As the "12th Five-Year Plan" grid investment starts gradually, the 2012 grid construction will continue to focus on the two main aspects of "new and old", namely, the construction of power grids and the promotion of smart grids including UHV, on the one hand, and Rural-based power grid renovation and upgrading project. Among them, the smart grid can efficiently and optimally configure China's power resources, and is an important means to solve the "electricity shortage". It is already in the final stages of pilot planning and standard formulation, and will therefore enter a large-scale construction phase in 2012. At the same time, a new round of three-year rural network upgrade will also enter a critical period in 2012.
Among them, the grid investment will gradually assume the characteristics of "big two, small in the middle", that is, the UHV investment and rural power grid below 110 kV and the "two big" investment in urban distribution network. After the main network has undergone large-scale construction in recent years, investment will slow down. In addition, power grid companies will also make new achievements in terms of “going out†to strengthen international cooperation, build an electric vehicle replacement and charging service network, promote the construction of smart substations, and resolve new energy grids.
“Electricity Road†is a new engine for the development of Tibet-producing areas On December 9, 2011, the Qinghai-Tibet Power Grid interconnection project, a major energy artery linking Qinghai and Tibet, was put into trial operation. According to the information recently released by the Northwest Electric Power Grid Company, with the completion and commissioning of the Qinghai-Tibet network project, the Northwest Power Grid currently transmits power to Tibet with a maximum transmission power of 100,000 kilowatts per day. In the winter of 2011, the maximum load expected by the Tibet-China Power Grid is up to 540,000 kilowatts, and there will be no shortage of electricity in the centralized electricity use area in Tibet.
"The Qinghai-Tibet network project is the 'bright line' and 'happy line' of the people in the Qinghai-Tibet provinces. More people in Tibet will use electricity and use electricity to plug wings for Tibet's leap-forward development." Chairman of Tibet Power Company Liu Kezhen said.
It is foreseeable that from 2012 onwards, the Qinghai-Tibet network project will not only rewrite the history of the “electricity shortage†in Tibet, but will also become an important channel for the “transmission of hidden electricityâ€. After the hydropower construction in Tibet reaches a certain level, the Qinghai-Tibet Interconnection Project can transfer the surplus hydroelectricity during the summer flood season to the Qinghai Power Grid, transforming the hydropower resources in Tibet into economic benefits, and will also support the Qaidam National Circular Economy Experimental Zone in Qinghai Province. Rapid development. It has been estimated that through this route, Tibet Power Grid can fully meet the electricity demand of Tibet’s economic and social development, and will no longer be embarrassed to protect the people’s livelihood and limit power supply to the industry.
In recent years, Tibet has seized six specialty industries, namely mining industry, Tibetan medicine, national handicrafts, special tourism, featured agriculture and animal husbandry, and green food (food) products, and has built a number of high-profile plateau features. Brand. With the official operation of the Qinghai-Tibet network project, Tibet will transform its economic development mode and expand its characteristic and advantageous industries, which will open up a new chapter in leap-forward sustainable development in the region.
UHV projects will be accelerated In recent days, the National Grid Corporation's 1,000-kV Jindongnan-Jingmen UHV AC demonstration project expansion project was formally put into operation. At this point, the line has become the world's highest voltage level, the highest level of technical transmission and transmission projects, transmission capacity of more than 500 million kilowatts, creating the world's highest single-circuit AC transmission capacity of the highest record.
According to the previous unified deployment of the State Grid, five UHV AC projects in Huainan (Tongnan)-Shanghai, Ximeng-Nanjing, Huainan (Nanjing)-Shanghai, Mengxi-Changsha, Jingbian-Lianyungang, and Xiluodu were completed in 2011. The approval of two UHV DC projects in West Zhejiang, Hami and Henan. However, actual progress was lower than expected. It is understood that as of December 15, 2011, exchange of UHV only Ximeng – Nanjing, Huainan – Shanghai was approved.
With the country's control of coal production, the increasing pressure on coal transportation, and the far-reaching impact of Japan's Fukushima nuclear accident on China's nuclear power development, coal shortages and power shortages in the eastern and central regions of China will persist for a long time to come. Therefore, supporting the development and application of ultra-high voltage transmission technology and giving full play to the role of the power grid in the allocation of energy resources is undoubtedly one of the important measures to ease the “electricity shortageâ€.
According to sources, the Hami-Zhengzhou ±800 kv UHVDC transmission project has been approved by the National Development and Reform Commission; the Huainan-Shanghai UHV AC line can be tendered in the first quarter of 2012; the Ningdong-Zhejiang UHV DC project won the National Energy Administration. Agreeing to carry out the approval of the preliminary work... These show that the construction of UHV projects in 2012 will accelerate.
Rural network transformation and upgrading to enter the critical stage Recently, the National Grid held a rural network project stage summary and work to promote video and telephone conference revealed that the state issued a rural network transformation and upgrading of the 2010 plan is about to complete, the 2011 plan has been launched. At the same time, the country will arrange the 2012 plan in the near future.
It is understood that the State Grid plans to invest 48.84 billion yuan for a new round of agricultural network transformation and upgrading projects in 2010, as of December 20, 2011, has completed investment 47.87 billion yuan. Twelve provincial power companies such as Jiangxi, Jilin and Ningxia completed the investment plan for 2010. The rural “low voltage†treatment speeded up, and the 14.47 million household low-voltage problems were comprehensively managed; the rural grid power supply reliability and comprehensive supply voltage pass rates increased by 0.029 and 0.211 percentage points, respectively.
According to the previous deployment of the National Development and Reform Commission, this round of rural network reconstruction upgrade for a period of three years, to the end of 2012. By then, there will be no basic transformation of the rural power grids that has been transformed to solve the problem of inadequate power supply capacity in rural power grids. Rural residents' electricity consumption will be better protected, and power supply in agricultural production facilities will be basically solved; all types of use in cities and rural areas will be realized by provinces. Electricity price target; basically build a new type of rural power grid that is "safe, reliable, energy-saving, environmental protection, advanced technology, and standardized management." Therefore, the task of upgrading and upgrading rural power grids in 2012 will be extremely heavy.
At present, the State Grid requires all units to seriously plan for 2012 work. Some areas that have made rapid progress have begun to deploy the upgrading and upgrading of rural power grids in 2012. For example, the feasibility study report on a new round of rural power network transformation and upgrading project in Shanxi Province was successfully passed in 2012, with a planned investment of 1.75 billion yuan. The assessment of the feasibility study report for the 2012 rural power grid reconstruction and upgrading project in Jiangxi Province has been completed, and it is planned to invest 2 billion yuan; 2012 In Xinjiang, the key projects will be focused on the demonstration project... Comprehensive news from all parties that the 2012 rural power grid transformation and upgrading will enter the all-out stage.
Xiafeng Dongfeng Even more pressure At present, China is in the stage of rapid industrialization and urbanization, and economic restructuring needs a process. It is expected that in the next two years, China's power demand will continue to grow at a relatively fast rate, with an average annual growth rate of approximately 8.5%. According to statistics, the electricity situation in 2012 will be even more tense, and the peak period of summer electricity consumption may reach 50 million kilowatts.
According to relevant data from the State Grid, in 2012, the maximum load for the unified adjustment of the State Grid's operating area is expected to reach 635 million kilowatts, and 60 million kilowatts of new installed capacity, a year-on-year drop of 25%. It is expected that the power supply and demand situation in the country's power grid operating region will become more severe, with a maximum power shortage of about 49 million kilowatts. Among them, the maximum power gaps in North China, East China, and Central China Power Grid reach 1,000, 2500, and 14 million kilowatts, respectively. Among the provincial power grids, the power supply and demand situation of 11 power grids such as Beijing-Tianjin-Tangshan, Hebei-South, Shandong, Shanghai, Jiangsu, Zhejiang, Hubei, Hunan, Henan, Jiangxi and Chongqing are tense. Its Jiangsu and Zhejiang power grids have a power gap of 13.4 million and 9.3 million kilowatts, respectively, accounting for about 17% of the maximum load.
China Southern Power Grid recently revealed that the Southern Power Grid's electricity supply and demand situation and the West-China East Power Transmission Symposium in 2012 also revealed that comprehensive consideration of factors such as dry weather and insufficient installed capacity in the next year will result in a continuous shortage of electricity for the whole year. The maximum power gap is 8 million to 14 million kilowatts, of which the most difficult one is March to May, and the average power gap is about 13 million kilowatts. Among them, Guangdong's electricity gap is the largest in the entire network.
In this case, the power grid companies will be very difficult to maintain the voltage. In this regard, power grid companies will focus on equipment procurement, installation, commissioning, acceptance and other aspects of the strict quality control to ensure that the project completed on schedule. At the same time, we will scientifically and reasonably arrange power grid operation methods, strengthen safety assessment and operation maintenance of power transmission and transformation equipment, earnestly implement disaster prevention measures such as flood prevention, typhoon prevention, and lightning protection, and actively organize self-inspection and special supervision to eliminate potential accidents in advance.
Power grid companies "going out" accelerating It is reported that the British National Grid is currently negotiating with the national grid to sell its four natural gas networks. Each gas grid is expected to sell between 1 billion and 2 billion pounds. At the same time, the news also stated that National Grid has a stake of approximately 10% of the UK national grid and has a price of 2.2 billion pounds. It is expected that the transaction will be completed in January 2012 at the earliest. At that time, State Grid may become a major shareholder of the British National Grid, which involves the issuance of new shares. The estimated price is 21.66 billion yuan. It is understood that the British National Grid Corporation has a number of regional gas networks in the United Kingdom and the national high-pressure gas network.
Lin Boqiang, director of the China Energy Economic Research Center at Xiamen University, said: "For the national grid, the benefits of overseas investment are not necessarily worse than domestic ones. This is also an important step for the country's grid to 'go global.' Hundreds of billions of grid investments are not large amounts of money."
In 2007, SGCC established the Philippine National Grid Corporation with Philippine Grid Power Resources Corporation of the Philippines and Karaka Power Company, of which the national grid accounted for 40% of the total shares and was the single largest shareholder. In 2009, the State Grid officially took over the operation of the Philippine National Transmission Network. In 2010, State Grid acquired and took over seven transmission concessions in Brazil for US$989 million... With the breakthrough in UHV technology breakthroughs and the successful acquisition of Philippine Power Grid and Brazilian transmission companies, the national grid has gained international reputation. The conditions for becoming internationalized have become increasingly mature. It can be expected that compared with the previous period, the “going out†of the national grid in 2012 will pay more attention to the follow-up effect, including the output of technology, product output, and operational capabilities.
In addition, China Southern Power Grid will also play its role as the Chinese executive unit of the Greater Mekong Subregion Power Cooperation. It will take advantage of China Southern Power Grid's unique geopolitical and locational advantages to coordinate international and domestic resources and two markets, and to ensure the nation’s energy security while expanding the South China Grid. Expansion capacity.
Smart Substation Construction Further Expanded On December 24, 2011, the first 220 kV intelligent substation in Anhui Power Grid--Binjiang Substation was completed and put into operation in Tongling; on December 24, the first 220 kV pilot intelligent substation in Zhejiang's State Grid-- The Hangzhou Yunhui Substation was smoothly put into operation; on December 23, the first new 220kV smart substation of Hebei Nanwang was put into operation; on the morning of December 20th, the first 220kV substation in Sichuan was put into use in Mianyang. ...... As of now, China has built smart substations in various regions, and has initially demonstrated the features of resource conservation, environmental protection, smart equipment, and advanced technology, and has played a good role in demonstration.
From the Beichuan 110 kV smart substation to the 220 kV Xiqiao smart substation, from the 500 kV Lanxi substation to the world's highest voltage level smart substation - the 750 kV Yanan substation, and to the first domestic 500 in the "mirror" layout. The KV smart substation - 500 kV Changshu South Substation was put into operation, and the pilot project of China's smart substation continued to make new progress. It is understood that these substations use some of the same smart technology, but also according to different voltage levels and types of projects, adding some corresponding intelligent functions, which will accumulate valuable experience for the construction of smart substations in China.
Smart substations can better meet the requirements of grid informatization, automation, and interaction in terms of technology and functions, optimize the grid structure of the grid, and greatly increase the capacity of transmission and distribution and the level of intelligence. At present, the State Grid has made smart substations one of the promotion tasks.
Therefore, with the completion of relevant standards development work, and the maturity and improvement of related technologies and equipment, starting from the second half of 2011, a large number of smart substation projects in China have begun bidding, and the number and range of equipment will gradually expand. It is foreseeable that the construction of smart substations will be further expanded in 2012.
The Bohai Bohai Electric Vehicle Replacement and Speed-Up Network will be completed soon. The first phase of the construction of the Shanghai-Hangzhou Intercity Interconnect Project will mark the realization of the inter-provincial free-riding operation of electric passenger car users in the Suhuhang area. The electric vehicles originally subject to cruising mileage limits have been able to freely travel between Shanghai, Suzhou and Hangzhou, truly inter-provincial inter-city interoperability, and this project is part of the Yangtze River Delta charge-for-service network.
It is understood that, in light of the distribution characteristics of China's electric vehicle replacement demand for electricity, the State Grid will build an inter-city smart charging and replacement service network in two regions around the Bohai Sea and the Yangtze River Delta. Compared with the Yangtze River Delta region, the Bohai Rim region covers the two major municipalities of China, Beijing and Tianjin. Therefore, industry sources revealed that compared with the Yangtze River Delta region, the State Grid is more cautious in building a smart charging and replacing power service network in the Bohai Rim region.
With the launch of the first phase of the Suzhou-Shanghai-Shanghai inter-city interconnection project, and the Zhejiang demonstration project of the intelligent charging and replacing power service network that was completed and put into operation (supporting electric vehicles traveling across the city between Hangzhou and Jinhua), the State Grid has accumulated experience and innovation. The standard system and operation mode will break through the development of key equipment and technologies, and will play an important role in promoting the establishment of the Bohai Sea charge and exchange service network.
In fact, related areas in the Bohai Rim have begun to plan the construction of an electric vehicle charging and replacement service network. For example, during the "12th Five-Year Plan" period, the Liaoning Provincial Electric Power Company will comprehensively create a coastal economic belt covering the "Five Points and One Line" in Liaoning Province and an economically developed city centered in Shenyang, as well as intelligent electric vehicle replacement for the major highways in the province. Service network; Tianjin inter-city Internet construction will use Beijing-Tianjin inter-city interconnection as a starting point to form an inter-city interconnection network covering Tianjin-Beijing, Tianjin-Tangshan, Tianjin-Baoding, and Tianjin-Jinan within the Bohai economic zone.
In addition to the Yangtze River Delta and the Bohai Rim, other provinces and cities are also accelerating the pace of building electric vehicles to replace electric equipment and networks. Some cities in Jinan have made it clear that they will initially build a service radius of no more than 5 during the “Twelfth Five-Year Plan†period. Kilometers of intelligent charging service network. Therefore, it can be foreseen that the construction of electric vehicle charging and swapping service network in 2012 will be further expanded.
The intelligentization of rural power network spreads from "point" to "face" in 2011. The first batch of rural power network intelligent pilot projects of the State Grid passed acceptance. On this basis, the State Grid has built six pilot sites such as Gaomi and Penglai in Shandong, Feixi in Anhui, Mengyang in Henan, Mengjin in Tianjin, and Shenbei New District in Liaoning, vigorously expanding the intelligent coverage of agricultural networks. At present, these rural network intelligence projects are being steadily implemented, and some have begun to show results. For example, the agricultural network of Shenbei New District has the advantages of substations adopting GIS combined electric appliances, applying ACCC carbon fiber composite core conductors, realizing remote centralized meter reading, conducting live operation, applying amorphous alloy transformers, and introducing geographic information systems. It is expected that these projects will be completed by the end of 2012.
The intelligentization of rural power grids is a typical example of combining rural power grids with smart grids. On the one hand, it integrates the high-speed, two-way, real-time, and integrated advanced technology and standardized management concepts of the smart grid into the rural network transformation, which greatly promotes the degree of intellectualization of the rural power grid; on the other hand, through the rural network transformation and With the combination of smart grids, advanced technologies of smart grids can be introduced into the transformation of rural power grids, and in accordance with local conditions and economically reasonable principles, the demand for electricity generated by rural development can be met.
Previously, as the first batch of pilot projects, Zhejiang Quzhou, Jinghai, Tianjin, and Pucheng, Shaanxi, representing the coastal developed areas, the surrounding areas of large and medium-sized cities, and the central and western regions, implemented rural power distribution automation, rural power distribution stations, and rural areas. Comprehensive information collection system and agricultural network management mode optimization and other integrated projects.
It is understood that through these pilot projects, the State Grid will expand the coverage of key technologies such as smart distribution stations and agricultural distribution network automation, combine the changes in the development mode of the State Grid, further strengthen research on key technologies, equipment, and management models, and focus on county areas. The construction of power communication network will gradually establish a series of standards for agricultural network intelligence. It can be foreseen that with the advancement of the rural network's intelligent project "points" to the "face", not only will the level of rural power grids be improved, the electricity demand for farmers' lives will be guaranteed, but also the local industry will be combined to drive the local economy. development of.
The role of the “granary†of Northwest Electric Power emerged From December 22-23, 2011, the State Grid organized a (preliminary) preliminary design review meeting for the Hami-Zhengzhou ±800 kV UHVDC transmission project in Beijing, and conducted a comprehensive and detailed assessment of the project's commutation. Station and line design technical solutions. This is the world’s first ±800 kV DC transmission project with a transmission capacity of 8 million kilowatts. After completion, it can deliver 37 billion kilowatt-hours of electricity to Henan, equivalent to 18 million tons of coal.
Zheng Baosen, deputy general manager of the State Grid, pointed out that the construction of the Hami-Zhengzhou DC transmission project will send the coal power and wind power resources in the Hami region of Xinjiang to the Henan load center area, and transform the western resource advantages into economic advantages. It is of great significance for the implementation of regional development strategies such as maintaining long-term peace and stability in the ethnic areas of Xinjiang, and promoting the development of the western region and the rise of the central region.
Northwest China is currently one of the most prosperous regions in China's energy resources. Among them, coal reserves account for about half of the country's total, and wind energy resources account for about one-third of the nation's total land-based development. The potential for power development is enormous. During the “Twelfth Five-Year Plan†period, the Northwest Power Grid, as the sending end of the UHV power grids of North China, Central China, and East China, will “join†the large-scale coal-fired power, hydropower, and wind power bases in the northwest region with China’s central and eastern power loads.
The data show that in 2011, Northwest Grid achieved 42.8 billion kWh of cross-regional transaction power, an increase of 160% compared with the same period of last year, and completed cross-provincial transaction power of 7.2 billion kWh, a year-on-year increase of 38%, both of which hit a record high, and Northwest Power “granary†"The effect has already begun to appear.
In 2012, the Northwest will, on the basis of ensuring the power supply in the five provinces (districts) within the region and the demand for direct-flow trading in the Qinghai-Tibet Plateau, satisfy the power purchase needs of the central and western China, North China (Shandong) and East China in the northwest region to the maximum, and deepen the acceptance of new energy resources. We implemented the mutual economic transactions between Gansu wind power, thermal power and hydropower in Qinghai, and promoted Haixi Photovoltaic Access Energy Trading. It is estimated that in 2012, the trans-provincial and inter-provincial electricity consumption in the five northwestern provinces will reach 58.8 billion kilowatt-hours, of which 42 billion kilowatt-hours will be sent to Central China, North China, and Tibet, and the trans-provincial transaction power will reach 16 billion kilowatt-hours.
Further cracking new energy grid connection difficulties On December 25, 2011, the National Wind Energy Storage and Transmission Demonstration Project independently designed and built by the State Grid was completed and put into production. This is the largest in the world and integrates wind power, photovoltaic power generation, energy storage, and intelligent power transmission. The new energy comprehensive utilization platform, the first phase of the project built wind power 100,000 kilowatts, photovoltaic power generation 40,000 kilowatts, energy storage 20,000 kilowatts, supporting the construction of a joint control center for scenery and storage and a 220 kV smart substation. According to the State Grid, the project achieves stable and controllable new energy generation through wind and solar power compensation, energy storage regulation, and intelligent dispatch, and can effectively solve the technical difficulties of new energy grid integration.
In recent years, China's wind power and other new energy industries have continued to develop rapidly, and their grid connection problems have also become increasingly prominent. For example, in 2011, wind turbines in Jiuquan, Guazhou, and Zhangjiakou in Hebei caused grid off-grid accidents. Zhao Yuhai, Director of the Department of High-tech Development and Industrialization of the Ministry of Science and Technology, said that this demonstration project of wind-storage storage and storage will be developed into a base for testing various new energy grid-connected technologies in China to promote the development of new energy technologies such as photovoltaic and energy storage batteries.
It is understood that at present, China has increased the research of new energy grid-connected technologies to the national level. On December 21st, the project of “Research and Development of Wind Farms and Photovoltaic Power Plant Cluster Control Systemâ€, which was listed as a national high-tech research and development program ("863" project), was launched in Gansu. It is reported that this project will use Jiuquan windmills with 10 million kilowatts of wind power and million kilowatts of photovoltaic bases as its control targets. It will focus on research on the safety and stability control strategies for large-scale wind and photovoltaic clusters, and build Jiuquan wind farms and photovoltaic power station cluster control systems to improve overall landscape scenery. The power clusters respond to the ability of large-scale power grid dispatches to ease the contradiction between large-scale and centralized development of renewable energy and grid coordination.
It can be foreseen that, under the drive of the National Wind Energy Storage and Demonstration Project, with the efforts of related departments and enterprises, the new energy grid connection problem will be further solved in 2012, and the corresponding industry standard system will be formed.
Among them, the grid investment will gradually assume the characteristics of "big two, small in the middle", that is, the UHV investment and rural power grid below 110 kV and the "two big" investment in urban distribution network. After the main network has undergone large-scale construction in recent years, investment will slow down. In addition, power grid companies will also make new achievements in terms of “going out†to strengthen international cooperation, build an electric vehicle replacement and charging service network, promote the construction of smart substations, and resolve new energy grids.
“Electricity Road†is a new engine for the development of Tibet-producing areas On December 9, 2011, the Qinghai-Tibet Power Grid interconnection project, a major energy artery linking Qinghai and Tibet, was put into trial operation. According to the information recently released by the Northwest Electric Power Grid Company, with the completion and commissioning of the Qinghai-Tibet network project, the Northwest Power Grid currently transmits power to Tibet with a maximum transmission power of 100,000 kilowatts per day. In the winter of 2011, the maximum load expected by the Tibet-China Power Grid is up to 540,000 kilowatts, and there will be no shortage of electricity in the centralized electricity use area in Tibet.
"The Qinghai-Tibet network project is the 'bright line' and 'happy line' of the people in the Qinghai-Tibet provinces. More people in Tibet will use electricity and use electricity to plug wings for Tibet's leap-forward development." Chairman of Tibet Power Company Liu Kezhen said.
It is foreseeable that from 2012 onwards, the Qinghai-Tibet network project will not only rewrite the history of the “electricity shortage†in Tibet, but will also become an important channel for the “transmission of hidden electricityâ€. After the hydropower construction in Tibet reaches a certain level, the Qinghai-Tibet Interconnection Project can transfer the surplus hydroelectricity during the summer flood season to the Qinghai Power Grid, transforming the hydropower resources in Tibet into economic benefits, and will also support the Qaidam National Circular Economy Experimental Zone in Qinghai Province. Rapid development. It has been estimated that through this route, Tibet Power Grid can fully meet the electricity demand of Tibet’s economic and social development, and will no longer be embarrassed to protect the people’s livelihood and limit power supply to the industry.
In recent years, Tibet has seized six specialty industries, namely mining industry, Tibetan medicine, national handicrafts, special tourism, featured agriculture and animal husbandry, and green food (food) products, and has built a number of high-profile plateau features. Brand. With the official operation of the Qinghai-Tibet network project, Tibet will transform its economic development mode and expand its characteristic and advantageous industries, which will open up a new chapter in leap-forward sustainable development in the region.
UHV projects will be accelerated In recent days, the National Grid Corporation's 1,000-kV Jindongnan-Jingmen UHV AC demonstration project expansion project was formally put into operation. At this point, the line has become the world's highest voltage level, the highest level of technical transmission and transmission projects, transmission capacity of more than 500 million kilowatts, creating the world's highest single-circuit AC transmission capacity of the highest record.
According to the previous unified deployment of the State Grid, five UHV AC projects in Huainan (Tongnan)-Shanghai, Ximeng-Nanjing, Huainan (Nanjing)-Shanghai, Mengxi-Changsha, Jingbian-Lianyungang, and Xiluodu were completed in 2011. The approval of two UHV DC projects in West Zhejiang, Hami and Henan. However, actual progress was lower than expected. It is understood that as of December 15, 2011, exchange of UHV only Ximeng – Nanjing, Huainan – Shanghai was approved.
With the country's control of coal production, the increasing pressure on coal transportation, and the far-reaching impact of Japan's Fukushima nuclear accident on China's nuclear power development, coal shortages and power shortages in the eastern and central regions of China will persist for a long time to come. Therefore, supporting the development and application of ultra-high voltage transmission technology and giving full play to the role of the power grid in the allocation of energy resources is undoubtedly one of the important measures to ease the “electricity shortageâ€.
According to sources, the Hami-Zhengzhou ±800 kv UHVDC transmission project has been approved by the National Development and Reform Commission; the Huainan-Shanghai UHV AC line can be tendered in the first quarter of 2012; the Ningdong-Zhejiang UHV DC project won the National Energy Administration. Agreeing to carry out the approval of the preliminary work... These show that the construction of UHV projects in 2012 will accelerate.
Rural network transformation and upgrading to enter the critical stage Recently, the National Grid held a rural network project stage summary and work to promote video and telephone conference revealed that the state issued a rural network transformation and upgrading of the 2010 plan is about to complete, the 2011 plan has been launched. At the same time, the country will arrange the 2012 plan in the near future.
It is understood that the State Grid plans to invest 48.84 billion yuan for a new round of agricultural network transformation and upgrading projects in 2010, as of December 20, 2011, has completed investment 47.87 billion yuan. Twelve provincial power companies such as Jiangxi, Jilin and Ningxia completed the investment plan for 2010. The rural “low voltage†treatment speeded up, and the 14.47 million household low-voltage problems were comprehensively managed; the rural grid power supply reliability and comprehensive supply voltage pass rates increased by 0.029 and 0.211 percentage points, respectively.
According to the previous deployment of the National Development and Reform Commission, this round of rural network reconstruction upgrade for a period of three years, to the end of 2012. By then, there will be no basic transformation of the rural power grids that has been transformed to solve the problem of inadequate power supply capacity in rural power grids. Rural residents' electricity consumption will be better protected, and power supply in agricultural production facilities will be basically solved; all types of use in cities and rural areas will be realized by provinces. Electricity price target; basically build a new type of rural power grid that is "safe, reliable, energy-saving, environmental protection, advanced technology, and standardized management." Therefore, the task of upgrading and upgrading rural power grids in 2012 will be extremely heavy.
At present, the State Grid requires all units to seriously plan for 2012 work. Some areas that have made rapid progress have begun to deploy the upgrading and upgrading of rural power grids in 2012. For example, the feasibility study report on a new round of rural power network transformation and upgrading project in Shanxi Province was successfully passed in 2012, with a planned investment of 1.75 billion yuan. The assessment of the feasibility study report for the 2012 rural power grid reconstruction and upgrading project in Jiangxi Province has been completed, and it is planned to invest 2 billion yuan; 2012 In Xinjiang, the key projects will be focused on the demonstration project... Comprehensive news from all parties that the 2012 rural power grid transformation and upgrading will enter the all-out stage.
Xiafeng Dongfeng Even more pressure At present, China is in the stage of rapid industrialization and urbanization, and economic restructuring needs a process. It is expected that in the next two years, China's power demand will continue to grow at a relatively fast rate, with an average annual growth rate of approximately 8.5%. According to statistics, the electricity situation in 2012 will be even more tense, and the peak period of summer electricity consumption may reach 50 million kilowatts.
According to relevant data from the State Grid, in 2012, the maximum load for the unified adjustment of the State Grid's operating area is expected to reach 635 million kilowatts, and 60 million kilowatts of new installed capacity, a year-on-year drop of 25%. It is expected that the power supply and demand situation in the country's power grid operating region will become more severe, with a maximum power shortage of about 49 million kilowatts. Among them, the maximum power gaps in North China, East China, and Central China Power Grid reach 1,000, 2500, and 14 million kilowatts, respectively. Among the provincial power grids, the power supply and demand situation of 11 power grids such as Beijing-Tianjin-Tangshan, Hebei-South, Shandong, Shanghai, Jiangsu, Zhejiang, Hubei, Hunan, Henan, Jiangxi and Chongqing are tense. Its Jiangsu and Zhejiang power grids have a power gap of 13.4 million and 9.3 million kilowatts, respectively, accounting for about 17% of the maximum load.
China Southern Power Grid recently revealed that the Southern Power Grid's electricity supply and demand situation and the West-China East Power Transmission Symposium in 2012 also revealed that comprehensive consideration of factors such as dry weather and insufficient installed capacity in the next year will result in a continuous shortage of electricity for the whole year. The maximum power gap is 8 million to 14 million kilowatts, of which the most difficult one is March to May, and the average power gap is about 13 million kilowatts. Among them, Guangdong's electricity gap is the largest in the entire network.
In this case, the power grid companies will be very difficult to maintain the voltage. In this regard, power grid companies will focus on equipment procurement, installation, commissioning, acceptance and other aspects of the strict quality control to ensure that the project completed on schedule. At the same time, we will scientifically and reasonably arrange power grid operation methods, strengthen safety assessment and operation maintenance of power transmission and transformation equipment, earnestly implement disaster prevention measures such as flood prevention, typhoon prevention, and lightning protection, and actively organize self-inspection and special supervision to eliminate potential accidents in advance.
Power grid companies "going out" accelerating It is reported that the British National Grid is currently negotiating with the national grid to sell its four natural gas networks. Each gas grid is expected to sell between 1 billion and 2 billion pounds. At the same time, the news also stated that National Grid has a stake of approximately 10% of the UK national grid and has a price of 2.2 billion pounds. It is expected that the transaction will be completed in January 2012 at the earliest. At that time, State Grid may become a major shareholder of the British National Grid, which involves the issuance of new shares. The estimated price is 21.66 billion yuan. It is understood that the British National Grid Corporation has a number of regional gas networks in the United Kingdom and the national high-pressure gas network.
Lin Boqiang, director of the China Energy Economic Research Center at Xiamen University, said: "For the national grid, the benefits of overseas investment are not necessarily worse than domestic ones. This is also an important step for the country's grid to 'go global.' Hundreds of billions of grid investments are not large amounts of money."
In 2007, SGCC established the Philippine National Grid Corporation with Philippine Grid Power Resources Corporation of the Philippines and Karaka Power Company, of which the national grid accounted for 40% of the total shares and was the single largest shareholder. In 2009, the State Grid officially took over the operation of the Philippine National Transmission Network. In 2010, State Grid acquired and took over seven transmission concessions in Brazil for US$989 million... With the breakthrough in UHV technology breakthroughs and the successful acquisition of Philippine Power Grid and Brazilian transmission companies, the national grid has gained international reputation. The conditions for becoming internationalized have become increasingly mature. It can be expected that compared with the previous period, the “going out†of the national grid in 2012 will pay more attention to the follow-up effect, including the output of technology, product output, and operational capabilities.
In addition, China Southern Power Grid will also play its role as the Chinese executive unit of the Greater Mekong Subregion Power Cooperation. It will take advantage of China Southern Power Grid's unique geopolitical and locational advantages to coordinate international and domestic resources and two markets, and to ensure the nation’s energy security while expanding the South China Grid. Expansion capacity.
Smart Substation Construction Further Expanded On December 24, 2011, the first 220 kV intelligent substation in Anhui Power Grid--Binjiang Substation was completed and put into operation in Tongling; on December 24, the first 220 kV pilot intelligent substation in Zhejiang's State Grid-- The Hangzhou Yunhui Substation was smoothly put into operation; on December 23, the first new 220kV smart substation of Hebei Nanwang was put into operation; on the morning of December 20th, the first 220kV substation in Sichuan was put into use in Mianyang. ...... As of now, China has built smart substations in various regions, and has initially demonstrated the features of resource conservation, environmental protection, smart equipment, and advanced technology, and has played a good role in demonstration.
From the Beichuan 110 kV smart substation to the 220 kV Xiqiao smart substation, from the 500 kV Lanxi substation to the world's highest voltage level smart substation - the 750 kV Yanan substation, and to the first domestic 500 in the "mirror" layout. The KV smart substation - 500 kV Changshu South Substation was put into operation, and the pilot project of China's smart substation continued to make new progress. It is understood that these substations use some of the same smart technology, but also according to different voltage levels and types of projects, adding some corresponding intelligent functions, which will accumulate valuable experience for the construction of smart substations in China.
Smart substations can better meet the requirements of grid informatization, automation, and interaction in terms of technology and functions, optimize the grid structure of the grid, and greatly increase the capacity of transmission and distribution and the level of intelligence. At present, the State Grid has made smart substations one of the promotion tasks.
Therefore, with the completion of relevant standards development work, and the maturity and improvement of related technologies and equipment, starting from the second half of 2011, a large number of smart substation projects in China have begun bidding, and the number and range of equipment will gradually expand. It is foreseeable that the construction of smart substations will be further expanded in 2012.
The Bohai Bohai Electric Vehicle Replacement and Speed-Up Network will be completed soon. The first phase of the construction of the Shanghai-Hangzhou Intercity Interconnect Project will mark the realization of the inter-provincial free-riding operation of electric passenger car users in the Suhuhang area. The electric vehicles originally subject to cruising mileage limits have been able to freely travel between Shanghai, Suzhou and Hangzhou, truly inter-provincial inter-city interoperability, and this project is part of the Yangtze River Delta charge-for-service network.
It is understood that, in light of the distribution characteristics of China's electric vehicle replacement demand for electricity, the State Grid will build an inter-city smart charging and replacement service network in two regions around the Bohai Sea and the Yangtze River Delta. Compared with the Yangtze River Delta region, the Bohai Rim region covers the two major municipalities of China, Beijing and Tianjin. Therefore, industry sources revealed that compared with the Yangtze River Delta region, the State Grid is more cautious in building a smart charging and replacing power service network in the Bohai Rim region.
With the launch of the first phase of the Suzhou-Shanghai-Shanghai inter-city interconnection project, and the Zhejiang demonstration project of the intelligent charging and replacing power service network that was completed and put into operation (supporting electric vehicles traveling across the city between Hangzhou and Jinhua), the State Grid has accumulated experience and innovation. The standard system and operation mode will break through the development of key equipment and technologies, and will play an important role in promoting the establishment of the Bohai Sea charge and exchange service network.
In fact, related areas in the Bohai Rim have begun to plan the construction of an electric vehicle charging and replacement service network. For example, during the "12th Five-Year Plan" period, the Liaoning Provincial Electric Power Company will comprehensively create a coastal economic belt covering the "Five Points and One Line" in Liaoning Province and an economically developed city centered in Shenyang, as well as intelligent electric vehicle replacement for the major highways in the province. Service network; Tianjin inter-city Internet construction will use Beijing-Tianjin inter-city interconnection as a starting point to form an inter-city interconnection network covering Tianjin-Beijing, Tianjin-Tangshan, Tianjin-Baoding, and Tianjin-Jinan within the Bohai economic zone.
In addition to the Yangtze River Delta and the Bohai Rim, other provinces and cities are also accelerating the pace of building electric vehicles to replace electric equipment and networks. Some cities in Jinan have made it clear that they will initially build a service radius of no more than 5 during the “Twelfth Five-Year Plan†period. Kilometers of intelligent charging service network. Therefore, it can be foreseen that the construction of electric vehicle charging and swapping service network in 2012 will be further expanded.
The intelligentization of rural power network spreads from "point" to "face" in 2011. The first batch of rural power network intelligent pilot projects of the State Grid passed acceptance. On this basis, the State Grid has built six pilot sites such as Gaomi and Penglai in Shandong, Feixi in Anhui, Mengyang in Henan, Mengjin in Tianjin, and Shenbei New District in Liaoning, vigorously expanding the intelligent coverage of agricultural networks. At present, these rural network intelligence projects are being steadily implemented, and some have begun to show results. For example, the agricultural network of Shenbei New District has the advantages of substations adopting GIS combined electric appliances, applying ACCC carbon fiber composite core conductors, realizing remote centralized meter reading, conducting live operation, applying amorphous alloy transformers, and introducing geographic information systems. It is expected that these projects will be completed by the end of 2012.
The intelligentization of rural power grids is a typical example of combining rural power grids with smart grids. On the one hand, it integrates the high-speed, two-way, real-time, and integrated advanced technology and standardized management concepts of the smart grid into the rural network transformation, which greatly promotes the degree of intellectualization of the rural power grid; on the other hand, through the rural network transformation and With the combination of smart grids, advanced technologies of smart grids can be introduced into the transformation of rural power grids, and in accordance with local conditions and economically reasonable principles, the demand for electricity generated by rural development can be met.
Previously, as the first batch of pilot projects, Zhejiang Quzhou, Jinghai, Tianjin, and Pucheng, Shaanxi, representing the coastal developed areas, the surrounding areas of large and medium-sized cities, and the central and western regions, implemented rural power distribution automation, rural power distribution stations, and rural areas. Comprehensive information collection system and agricultural network management mode optimization and other integrated projects.
It is understood that through these pilot projects, the State Grid will expand the coverage of key technologies such as smart distribution stations and agricultural distribution network automation, combine the changes in the development mode of the State Grid, further strengthen research on key technologies, equipment, and management models, and focus on county areas. The construction of power communication network will gradually establish a series of standards for agricultural network intelligence. It can be foreseen that with the advancement of the rural network's intelligent project "points" to the "face", not only will the level of rural power grids be improved, the electricity demand for farmers' lives will be guaranteed, but also the local industry will be combined to drive the local economy. development of.
The role of the “granary†of Northwest Electric Power emerged From December 22-23, 2011, the State Grid organized a (preliminary) preliminary design review meeting for the Hami-Zhengzhou ±800 kV UHVDC transmission project in Beijing, and conducted a comprehensive and detailed assessment of the project's commutation. Station and line design technical solutions. This is the world’s first ±800 kV DC transmission project with a transmission capacity of 8 million kilowatts. After completion, it can deliver 37 billion kilowatt-hours of electricity to Henan, equivalent to 18 million tons of coal.
Zheng Baosen, deputy general manager of the State Grid, pointed out that the construction of the Hami-Zhengzhou DC transmission project will send the coal power and wind power resources in the Hami region of Xinjiang to the Henan load center area, and transform the western resource advantages into economic advantages. It is of great significance for the implementation of regional development strategies such as maintaining long-term peace and stability in the ethnic areas of Xinjiang, and promoting the development of the western region and the rise of the central region.
Northwest China is currently one of the most prosperous regions in China's energy resources. Among them, coal reserves account for about half of the country's total, and wind energy resources account for about one-third of the nation's total land-based development. The potential for power development is enormous. During the “Twelfth Five-Year Plan†period, the Northwest Power Grid, as the sending end of the UHV power grids of North China, Central China, and East China, will “join†the large-scale coal-fired power, hydropower, and wind power bases in the northwest region with China’s central and eastern power loads.
The data show that in 2011, Northwest Grid achieved 42.8 billion kWh of cross-regional transaction power, an increase of 160% compared with the same period of last year, and completed cross-provincial transaction power of 7.2 billion kWh, a year-on-year increase of 38%, both of which hit a record high, and Northwest Power “granary†"The effect has already begun to appear.
In 2012, the Northwest will, on the basis of ensuring the power supply in the five provinces (districts) within the region and the demand for direct-flow trading in the Qinghai-Tibet Plateau, satisfy the power purchase needs of the central and western China, North China (Shandong) and East China in the northwest region to the maximum, and deepen the acceptance of new energy resources. We implemented the mutual economic transactions between Gansu wind power, thermal power and hydropower in Qinghai, and promoted Haixi Photovoltaic Access Energy Trading. It is estimated that in 2012, the trans-provincial and inter-provincial electricity consumption in the five northwestern provinces will reach 58.8 billion kilowatt-hours, of which 42 billion kilowatt-hours will be sent to Central China, North China, and Tibet, and the trans-provincial transaction power will reach 16 billion kilowatt-hours.
Further cracking new energy grid connection difficulties On December 25, 2011, the National Wind Energy Storage and Transmission Demonstration Project independently designed and built by the State Grid was completed and put into production. This is the largest in the world and integrates wind power, photovoltaic power generation, energy storage, and intelligent power transmission. The new energy comprehensive utilization platform, the first phase of the project built wind power 100,000 kilowatts, photovoltaic power generation 40,000 kilowatts, energy storage 20,000 kilowatts, supporting the construction of a joint control center for scenery and storage and a 220 kV smart substation. According to the State Grid, the project achieves stable and controllable new energy generation through wind and solar power compensation, energy storage regulation, and intelligent dispatch, and can effectively solve the technical difficulties of new energy grid integration.
In recent years, China's wind power and other new energy industries have continued to develop rapidly, and their grid connection problems have also become increasingly prominent. For example, in 2011, wind turbines in Jiuquan, Guazhou, and Zhangjiakou in Hebei caused grid off-grid accidents. Zhao Yuhai, Director of the Department of High-tech Development and Industrialization of the Ministry of Science and Technology, said that this demonstration project of wind-storage storage and storage will be developed into a base for testing various new energy grid-connected technologies in China to promote the development of new energy technologies such as photovoltaic and energy storage batteries.
It is understood that at present, China has increased the research of new energy grid-connected technologies to the national level. On December 21st, the project of “Research and Development of Wind Farms and Photovoltaic Power Plant Cluster Control Systemâ€, which was listed as a national high-tech research and development program ("863" project), was launched in Gansu. It is reported that this project will use Jiuquan windmills with 10 million kilowatts of wind power and million kilowatts of photovoltaic bases as its control targets. It will focus on research on the safety and stability control strategies for large-scale wind and photovoltaic clusters, and build Jiuquan wind farms and photovoltaic power station cluster control systems to improve overall landscape scenery. The power clusters respond to the ability of large-scale power grid dispatches to ease the contradiction between large-scale and centralized development of renewable energy and grid coordination.
It can be foreseen that, under the drive of the National Wind Energy Storage and Demonstration Project, with the efforts of related departments and enterprises, the new energy grid connection problem will be further solved in 2012, and the corresponding industry standard system will be formed.
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