Should Accelerate the Construction of Large Power Channels

In order to solve the problems existing in the current development, it is necessary to adjust the power development ideas and transform the mode of power development. One of the focal points is to adjust the structure of the power supply and promote the diversification and clean development of power generation. The second is to optimize the layout of power supply, build large-scale power bases, and intensively develop energy resources. The National Twelfth Five-Year Plan for Renewable Energy Development proposes to intensify the development and construction of renewable energy resources in resource-rich regions and build a renewable energy advantage zone that is concentrated, contiguous and large-scale development. By 2020, the installed capacity of hydropower will reach 350 million kilowatts, 200 million kilowatts of wind power, 50 million kilowatts of solar power, and 30 million kilowatts of biomass power.

The national “Twelfth Five-Year Plan” outlines the construction of integrated energy bases in Shanxi, Ordos Basin, Eastern Inner Mongolia, Southwest China, and Xinjiang. It is located 800 to 3,000 kilometers away from the central and eastern load center, and over 90% of clean energy bases are The areas in the southwest, northwest, north China, and northeastern remote areas cannot be eliminated locally and must be absorbed by the UHV power grid in the load center of the central and eastern regions. In the future, the power flow pattern of large-scale transmission of electricity from west to east and from north to south in China will remain unchanged for a long time.

At the end of 2004, the State Grid Corporation of China initiated the UHV research and demonstration, and went to the “One Transit and Two Straight” project, which verified the feasibility and superiority of UHV transmission, and realized the large-scale, long-distance, and high-efficiency power transmission in China. Safeguarding the smooth implementation of national energy strategic planning and the sustainable economic and social development have created necessary conditions.

In January 2009, the 1000 kV Jindongnan-Nanyang-Jingmen UHV AC pilot demonstration project was put into operation; in July 2010, ±800 kV Xiangjiaba-Shanghai UHV DC project was put into operation; in December 2012, ± The 800 kV Jinping-Su-Nanh UHV DC project was put into operation; in January 2013, the “Ultra-high voltage AC transmission key technologies, complete sets of equipment and engineering applications” won the National Science and Technology Progress Award. UHV transmission technology is a fully mature technology and is a support technology for transforming the development mode of China's power.

It is recommended to approve and start the construction of a batch of UHV AC/DC projects that are in good condition and in urgent need, and to promote the coordinated development of UHV AC and DC. It is recommended to further increase the support for the construction of UHV projects, introduce preferential policies in land use, and improve relevant policies and standards in terms of compensation, demolition and civil coordination.

NPC deputy and general manager of Jiangsu Electric Power Co., Ltd. Shanye Cai is a large energy-saving and resource-saving province. Over 90% of primary energy is transferred from outside the province. Environmental protection and transportation pressure are huge. At the same time, the province’s newly-increased power generation capacity was limited, and the power supply was under strain. In 2012, the highest electricity load in the entire province reached 72.31 million kilowatts, and it is expected to reach 100 million kilowatts and 130 million kilowatts in 2015 and 2020, respectively. Considering the power generation projects that have been approved and allowed to carry out preparatory work and the out-of-area power-receiving plans that have already been completed, Jiangsu's 2015 and 2020 peak power consumption periods will have power shortages of 15 million kilowatts and 38 million kilowatts, respectively. The serious shortage of primary energy in Jiangsu and the difficulty in secondary energy self-sufficiency have determined that more calls must be introduced outside the region to create a new "large artery" for energy transmission through UHV power grids to fundamentally ease the power supply and demand contradiction across the province, ensuring energy security and electricity. Reliable supply.

From the start of the construction of the first UHV demonstration project in 2006, China’s UHV AC/DC transmission technology has achieved a complete breakthrough and has already met the conditions for large-scale construction of UHV power grids. The UHV cross-regional power transmission project has made remarkable achievements in Jiangsu. At the end of 2012, the ±800 kV Sichuan Jinping Hydropower Station to Jiangsu Suzhou UHVDC power transmission project was successfully put into operation, with a rated transmission power of 7.2 million kilowatts; and a 1,000 kV UHV AC demonstration project under construction by Suidong Electric (Huinan-Zhebei) ~ Shanghai) It is expected that it will be completed within the year and will deliver approximately 5 million kilowatts of power to the East China Load Center.

The related work of the UHV project has progressed smoothly. The Jiangsu Provincial Government set up a leading group for work and actively promoted the preliminary work of UHV and other important grid projects. At present, the preparatory work for the UHV AC project in Huainan, Nanjing, Shanghai, Ximeng, and Nanjing has been completed, with the approval conditions. The feasibility study for the Ximeng-Taizhou UHV DC project, the Jindongnan-Xuzhou UHV AC project has passed the review, and all preliminary preparations are in place.

It is recommended that under the guidance of the national energy plan, full consideration should be given to the reality of tight energy and electricity supply in economically developed areas and energy-intensive provinces such as Jiangsu, and the need for energy development and delivery in western and northern energy bases in China should be taken into consideration to accelerate the development of UHV power grids and promote greater development. Scope optimization of energy resources.

The first is to accelerate the development of the national UHV grid. Promote the formation of a UHV synchronous power grid, link large-scale energy bases and major load centers, and realize a large-scale energy distribution pattern of “West Power Transmission to the East” and “Northern Power Transmission to the South”. The second is to accelerate the implementation of relevant UHV projects in Jiangsu. In the first half of this year, it is recommended to approve the Huai'nan-Nanjing-Shanghai, Xi'an-Nanjing UHV AC power transmission and transformation project as soon as possible, and agree as soon as possible to carry out the preliminary work of the UHV DC in Jiangsu Province (Taizhou), UHV DC in Shanxi Province, Xudong-Xuzhou UHV AC project.

Zhang Ning, member of the National Committee of the Chinese People's Political Consultative Conference and general manager of Tianjin Electric Power Co., Ltd., saw from Tianjin that how to ensure sufficient and reliable supply of electricity while effectively solving the contradiction between energy and the environment is a major issue at present. First, there is a large gap in electricity supply. It is estimated that by 2015, the total social power consumption in Tianjin will reach 102 billion kwh, the maximum load on the power grid will reach 17 million kilowatts, and the power gap will be about 4.5 million kilowatts (30% of the total). The second is the pressure on energy conservation and emission reduction. Tianjin is a typical energy input city, in which coal consumption accounts for about 70% of the total primary energy consumption in the city, and it is urgent to accelerate the transformation of energy development methods. Recently, Tianjin has experienced the most severe long-term and extensive smog weather in the same period since 1990. PM2.5 is 5 to 8 times higher than the safety value, and environmental protection issues are further highlighted. It is imperative to increase the proportion of electricity received outside Tianjin and reduce coal-fired emissions.

The first proposal is to incorporate the development of UHV into the National Twelfth Five-Year Plan for energy development, power planning and special power grid planning, and to promote construction throughout the country. The second is to push Ximeng to Nanjing and other projects to land in Tianjin as soon as possible. It is recommended that the National Energy Administration approve and start construction of the Snake Union to the Nanjing 1000kV UHV power transmission and transformation project as soon as possible, and agrees to carry out the preparatory work for the 1000 kV UHV exchange between Mengxi and Tianjin South and the Tianjin Nantes UHV substation project. The Tianjin Nantes High-voltage substation and the Ximeng-Nanjing UHV transmission channel were constructed in the same period, and Tianjin Power Grid obtained power from the transmission channel to reach 3 million kilowatts at the end of the “Twelfth Five-year Plan” period.

Wang Xiaoxiang, member of the National Committee of the Chinese People's Political Consultative Conference and general manager of Sichuan Electric Power Co., Ltd., is characterized by outstanding energy resources such as water-footed and coal-poor. The theoretical reserve of hydraulic resources is 143 million kilowatts, and the amount of technological development is 120 million kilowatts, ranking first in the country; and coal The resource reserves rank 13th in the country, accounting for about 1% of the country's total reserves, and the per capita share is only one-seventh of the country's total. Hydropower's rich endowments determine the power structure based on hydropower. According to the Sichuan Power Construction Plan, by the end of 2015, the installed capacity of power generation in Sichuan reached approximately 93 million kilowatts, of which hydropower installed capacity was approximately 75 million kilowatts, and hydropower installed capacity accounted for 81%. Due to poor regulation performance of most hydropower stations, the maximum output of hydropower in dry season is only 40% of the installed capacity. It is expected that in 2015 and 2020 the province's largest power shortage during the dry season will reach about 10 million kilowatts and 14 million kilowatts, respectively, and the power shortage will exceed 20 billion yuan. Kilowatt hours. To meet the province's electricity supply, a large amount of thermal power is needed to supplement it during the dry season. If all of the province's coal-fired power plants make up for the shortfall, more than 13 million tons of electricity coal will need to be added in 2015 and 2020, and most of the coal shortages need to be met. Enter the resolution through the province. However, subject to factors such as the difficulty of coal source implementation and transportation capacity, even if Sichuan accelerates the pace of thermal power construction and makes up for the lack of installed capacity, there will be no coal available after the completion of the power plant. Therefore, it will be difficult to ensure Sichuan's dry season power supply by continuing to rely on a single coal-conveying traditional energy transmission method.

The "12th Five-Year Plan" for energy development formally promulgated in January 2013 clearly puts forward the energy strategy of "persisting coal transmission and transmission, and gradually increasing the proportion of transmission." With the breakthrough of UHV transmission technology, the transformation of traditional energy transmission methods and the transformation of coal transmission into electricity transmission have become a new direction of development. Xinjiang is one of the five comprehensive energy bases identified by the State's "12th Five-Year Plan for Energy Development." Coal has a predicted reserve of 2.19 trillion tons, ranking first in the country, and has abundant wind and solar energy resources. According to the “12th Five-Year Plan for Energy Development”, a large-scale coal base will be built in Xinjiang and will be sent to Central China. In order to co-ordinate the power demand of central-bound load centers in central China, in accordance with the principles of safety, efficiency, investment optimization, and best efficiency, considering the transmission distance, corridors, and routes, Sichuan is located in the westernmost part of central China, and the flow of power to Xinjiang is reasonable. Location advantages are even more pronounced.

The planned Xinjiang quasi-eastern ~ Sichuan Chengdu ±1100 kV UHVDC transmission project has a transmission capacity of 10 million kilowatts, which is equivalent to providing thermal power installations with the same capacity to Sichuan Province. The annual transmission of electricity is 50 billion kwh, equivalent to the annual transmission of electricity to Sichuan. Coal 33 million tons. This not only effectively solved the problem of insufficient supply of electricity during the dry season in Sichuan, reduced the pressure on coal transportation, alleviated the increasingly prominent environmental problems, but also contributed to the local transformation of resources in Xinjiang. It was the implementation of the national goal of achieving 30 million kilowatts of Xinjiang's external transmission of electricity. The important measures are of great significance for the promotion of economic and social development and long-term stability in ethnic areas.

It is proposed to accelerate the establishment and construction of the UHV DC transmission and transformation project of Xinjiang Jiangdian into Sichuan, and actively appeal to the relevant state departments to reach an unanimous consensus on the relevant issues as soon as possible, and strive to be included in the national "12th Five-Year Plan" special plan for the power grid to promote the country as soon as possible. The project agreed to carry out the preparatory work of the preparatory work, and pay close attention to carry out the preparatory work for the project as soon as possible to approve and start the construction, to achieve the completion of the 2015 production and lay the foundation.

National People's Congress Deputies, General Manager of Chongqing Electric Power Company Meng Qingqiang Chongqing Municipality is the only municipality in the central and western regions. It plays an important strategic role in promoting regional coordinated development and advancing the overall situation of reform and opening up. At present, relying on the Three Gorges follow-up work, coordinating the urban and rural reforms, and the development of the Liangjiang New Area, the Chongqing economy and society have entered a golden period of development.

According to the State Council's “Several Opinions on Promoting Overall Urban-Rural Reform and Development in Chongqing” (Guofa [2009] No. 3), Chongqing will build a power-centered, coal-based, natural gas-based, resource development and regional cooperation. Energy security system. However, Chongqing’s own resources are insufficient, and coal, water, and solar energy, wind energy and biomass energy are not dominant, and it is expected that the city's external energy dependence will approach 50% by the end of the “Twelfth Five-Year Plan”.

In the long run, Chongqing has a limited capacity for carrying its own power. It urgently needs to optimize and improve foreign power input channels, establish a long-term energy strategic cooperation mechanism with resource-rich regions, and realize “coal transmission and transmission” in parallel to fundamentally resolve the power shortage in Chongqing.

From the analysis of the power supply and demand situation in Chongqing in recent years and in the medium and long term, the demand for outsourcing power has been continuously increasing, and the capacity of existing trans-regional and inter-provincial power transmission channels is limited, and the pressure to protect power supply is increasing.

The Twelfth Five-Year Plan for National Economic and Social Development and the National Twelfth Five-Year Plan for Energy Development have all explicitly proposed to strengthen the construction of energy transmission corridors and develop UHV and other large-capacity, high-efficiency, and long-range advanced technologies. Transmission technology. From the viewpoint of ensuring the balance between long-term power supply and demand in Chongqing, Ya'an-Chongqing UHV AC and Hamibei-Chongqing UHV DC jointly form an AC-DC hybrid power supply structure, which is of great significance for securing Chongqing's energy power supply. The support of the construction of the "external transmission power plant" UHV channel. We are eager to incorporate Chongqing UHV construction into the national power grid special plan, accelerate the construction of Chongqing UHV projects, and lay a solid foundation for Chongqing to take the lead in building a well-to-do society and achieve optimal allocation of energy resources. Suggestions for this:

Accomplish the approval of the Ya'an-Chongqing 1000-kilovolt UHV AC project as soon as possible to ensure that construction will begin in 2013 and be put into operation as soon as possible. While ensuring the power supply in Chongqing, it will promote the optimal allocation of power resources in Chengyu Economic Zone.

As early as possible agreed to the early stage of the Hami North-Chongqing ± 800 kv UHV DC project to ensure the medium and long-term power supply in Chongqing. While meeting Chongqing's electricity demand, we will implement the East and West Water, Power, and Fire, and promote the optimal allocation of energy resources across the country.