Practice of Chongqing state grid electric power accelerating the construction of new power system
Writer： Hengfeng you electric Time：2023-04-10 views：times
On May 8, after 16 days of continuous operation, State Grid Chongqing EHV Co., Ltd. organized and completed the large-scale comprehensive maintenance of 500kV Zhangjiaba substation, 500kV Zhangma line 1 and 2 and Zhangzhou line 1 and 2 at the same time, so as to prepare Chongqing power grid for peak summer.
In January this year, the State Grid Chongqing electric power company formulated and released a new power system construction plan, integrated the resource endowment and power grid characteristics of various regions in Chongqing, and accelerated the implementation of one top-level plan, eight demonstration projects and eight strategic topics. The company adheres to both the supply side and the demand side, focuses on building a diversified and clean power guarantee system, actively promotes the entry of foreign power into Chongqing, guides the formation of a green and low-carbon production and lifestyle, and provides safe, reliable, clean and low-carbon power guarantee for the construction of double City Economic circle in Chengdu Chongqing area.
Increase the outsourcing and consumption of clean electricity to ensure power supply
On March 1, Chongqing Municipal Bureau of planning and natural resources, Tongliang District Bureau of planning and natural resources, and relevant principals of State Grid Chongqing electric power came to Tongliang district to carry out on-site discussion on promoting the land use of Tianfu south to Chongqing Tongliang 1000 kV high voltage AC project.
"After the Sichuan Chongqing UHV project is completed and put into operation, it will promote the interconnection of Chengdu Chongqing power grid, deliver Sichuan's clean energy to the Chengdu Chongqing twin city economic circle, and promote the implementation of the goals of carbon peak and carbon neutralization in Chengdu and Chongqing." Wu Hongbing, deputy chief engineer of Tongliang power supply company and director of the Ministry of construction, introduced that the land for the site of Sichuan Chongqing UHV project is advancing in an orderly manner.
A strong and reliable power grid is the basis and premise to ensure power transmission and supply. This year's work report of Chongqing municipal government proposed to start the Sichuan Chongqing UHV exchange project and promote the Three Gorges power, Sichuan power and Xinjiang power into Chongqing. State Grid Chongqing Electric Power earnestly implements the requirements of the municipal government, takes the purchased power as the key to Chongqing's energy and power security, and strengthens the purchase of clean power in Sichuan, Xinjiang, Tibet and other places and the construction of foreign power access to Chongqing, so as to improve the power security capacity of Chongqing power grid.
During the "14th five year plan" period, Chongqing will build a diversified pattern of foreign power supply to Chongqing, which is dominated by Xinjiang power and Sichuan power, supplemented by power from other regions. On the premise of ensuring safety, Chongqing will consume as much clean power as possible, reduce coal-fired power generation, and strive to consume more renewable energy power generation than 45% of the power consumption of the whole society in 2025.
"This year, the governments of Sichuan and Chongqing jointly issued the integrated construction plan of Sichuan Chongqing power grid. The feasibility study review of Sichuan Chongqing AC UHV was carried out, and the feasibility study bidding of Xinjiang Chongqing DC UHV was started." Tao Lin, director of the early stage Department of Chongqing Power Development Department of State Grid, introduced that with the acceleration of the work related to the entry of Xinjiang power and Sichuan power into Chongqing, the power supply capacity of Chongqing power grid will be greatly improved, and the input channels of clean energy power generation such as wind, light and water will be more unblocked.
Fengdu County, located in the hinterland of the Three Gorges Reservoir area, is making every effort to build a 10 billion yuan clean energy demonstration base in Chongqing. "In 2021, Fengdu power grid will consume 974 million kwh of clean energy locally, which is equivalent to saving 292200 tons of raw coal and reducing 779200 tons of carbon dioxide." Yin Feng, director of the Development Department of Fengdu power supply company, said that this year, Fengdu power grid will fully absorb local clean energy power generation such as wind, light and water.
Recently, the construction site of liziwan pumped storage power station in Fengdu County has been busy. The total installed capacity of the power station is 1.4 million KW, and the pumped power is 1.076 billion kwh. After completion, it will further optimize the power supply structure of Chongqing and alleviate the peak shaving pressure of the power grid.
Chongqing Panlong and Fengdu liziwan pumped storage projects have been included in the implementation list of major projects in Chongqing during the 14th five year plan. State Grid Chongqing electric power will also fully cooperate to promote the flexibility transformation of thermal power units, mobilize the enthusiasm of thermal power plants to participate in flexibility transformation and peak shaving, further strengthen the construction of key projects, and contribute to serving the "six stabilities" and "six guarantees" and promoting economic and social development.
Promote the improvement of terminal energy efficiency and help the low-carbon upgrading of the industry
In the process of promoting the implementation of the "double carbon" goal, the State Grid Chongqing electric power supports the optimization and upgrading of the industry, implements the comprehensive saving strategy, focuses on the key directions of multi energy complementarity, smart energy use and power big data, and promotes the formation of a green production and lifestyle.
Aiming at the characteristics of source load interaction of the new power system, State Grid Chongqing power has created a smart interactive platform for load clustering and established a cluster interactive load resource regulation mechanism. In October 2021, the company started the construction of load clustering intelligent interactive platform, expanded the application scenarios of commercial buildings, communication base stations, new energy vehicle charging stations, industrial parks and so on, selected 9 demonstration sites, and surveyed 1826 cluster load users.
On April 15, Guangzhou Shuangqiao (Chongqing) Co., Ltd., located in Jiangjin Degan Industrial Park, put into operation the energy consumption diagnosis device - load clustering second level intelligent terminal, and connected to the load clustering intelligent interactive platform through the terminal. Guangzhou Shuangqiao (Chongqing) Co., Ltd. is the first pilot user of load clustering second smart terminal in Southwest China. After the terminal is put into operation, it helps the enterprise realize the application of load clustering resource regulation.
In recent years, the demand for nearby charging and fast charging of new energy vehicles has been growing. On March 7, the first batch of mobile charging piles in Chongqing were put into operation at the fast charging station in Weilong service area of Chongqing Chengdu expressway. The mobile charging pile can be connected to the power grid within 2 hours by building a "smart socket + mobile charging pile", so as to solve the problems of difficult holiday charging and low daily utilization of Expressway fast charging station.
"In the past, I used to charge at the charging station in Weilong service area on holidays. I often had to queue up and took a long time. Now there is a mobile charging pile, and the electricity is fully charged in less than 40 minutes." On May 2, at the fast charging station in Weilong service area, Zhang Yaming, an online car Hailing driver from Yongchuan District, told the staff of the charging station after using the mobile charging pile to charge the new energy vehicles.
State Grid Chongqing Electric Power accelerated the layout of charging stations and charging piles to serve citizens' green and low-carbon travel. By the end of 2021, the company had installed more than 3100 charging piles, built a "one ring and ten shooting" expressway charging service network, and realized the full coverage of charging piles in all districts and counties of the city.
While serving the new energy vehicle industry and helping the green development of the city, State Grid Chongqing electric power also plays the role of "barometer" of power big data in the macroeconomic and energy fields, assists relevant government departments to grasp the current situation and potential change trend of industrial structure, and provides decision-making reference for accurately formulating Industrial Development Planning and regional economic policies. "We took the lead in fully building the '1 + 38' city and district (county) energy big data center, forming an integrated service pattern of city and district (county) to help urban development." Guo Heng, special director of Intelligent Power Department of Chongqing Power Marketing Department of State Grid, introduced.
Promote the electrification of rural consumption and support the integrated development of urban and rural areas
On January 15, the combined mobile energy storage vehicle developed by State Grid Chongqing electric power was put into operation in Hejiayan village, Huatian Township, Youyang Tujia and Miao Autonomous County. He Huaqing, a villager, beat rice with the electric energy provided by the mobile energy storage vehicle, and said to the power supply staff who ensured the normal operation of the energy storage vehicle: "in the past, the rice beating machine sometimes couldn't be moved in case of power peak. Now with the mobile energy storage vehicle, the power consumption of rice processing is more guaranteed."
The combined mobile energy storage vehicle developed by State Grid Chongqing electric power adopts the free combination design of "vehicle, box and cabinet". The box and cabinet can be disassembled flexibly and can be used in a wide range of scenarios. The energy storage vehicle has been put into trial operation in the peak period of rice processing power consumption in Hejiayan village. It supplies power jointly with the transformer in the village, sharing one-third of the power supply load of the whole village, and meeting the power demand of 10 ~ 15 farmers in the whole process of rice irrigation, threshing and so on.
On April 10, Li Ling, the person in charge of the smart farm shed, remotely opened the sprinkler irrigation equipment through the "electricity housekeeper" app in the Changshou Chiang Mai Liangyuan scenic spot, which is more than 300 kilometers away from Hejiayan village. "I can now complete a series of processes such as watering, fertilizing, lighting and rolling curtains by sitting in the office and using my mobile phone." Li Ling said.
On March 9, Chongqing's first digital intelligence rural "electric post station" was completed and put into operation in the collective village of Ersheng Town, Banan District. The "electric post station" has three functional areas: business consultation and handling, rural intelligent energy monitoring platform and multi-functional services. The grid manager works regularly to help the villagers realize that the electricity can not go out of the village. At the same time, the "electric post station" promotes electric energy substitution and green energy consumption services in combination with the characteristics of local industries, and uses electric big data to assist the relevant departments of the governments of the two regions to continuously carry out rural revitalization and help the construction of beautiful villages.
In 2021, State Grid Chongqing Electric Power promoted the automation transformation of rural power grid, newly built and reconstructed 3570 kilometers of lines of 10kV and below, and newly replaced 1941 distribution transformers. The power supply reliability of rural distribution network reached 99.8006%, and the coverage of distribution automation lines reached 91%.
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