四川 阿坝特高压交流工程海拔最高标段今天贯通 成都 立体双环网 如何为超大城市充电

As a crucial clean energy base and a key hub for the "West-to-East Power Transmission" project, Sichuan is accelerating clean energy development while simultaneously advancing the construction of a new power grid that integrates the main grid, distribution network, and microgrids. The Aba-Chengdu East 1000 kV UHV AC project is one of the "main arteries" of this new power grid, and today (the 30th), the highest-altitude section of the project was completed. How was this project carried out in the high-altitude environment? The highest-altitude section of the Aba UHV AC project was completed today. CCTV reporter Chen Kai: This section, nestled among towering mountains, is the highest-altitude and most challenging section of the project. Just a few hours ago, this section was completed. Before completion, construction workers had to install spacers on the cables. This is a unique design for the high-altitude environment. At high altitudes, the air is thin, and the energy field of each 1000 kV UHV cable is very strong. If the conductors are arranged too close together, it can cause mutual interference, heat generation, and other problems, affecting transmission efficiency. Employing a highly distributed layout, the ten conductors are arranged like ten lanes of traffic, running parallel without interfering with each other. Testing has shown extremely high transmission efficiency and significantly reduced losses. The completed project today is equivalent to the "main artery" of the new power grid, while the Aba 1000 kV substation, once completed, will be the "heart" of the main grid. To cope with high altitude and extreme weather, the builders used many unique methods. First, the equipment here is very large, ensuring it can effectively withstand the challenges of extreme weather. Simultaneously, unique workshops were built for precision equipment like GIS (Gas Insulation System) units, using special materials that both block strong ultraviolet radiation and provide insulation, ensuring stable operation of the precision equipment. Furthermore, the construction site is located on a mountaintop. For the large transformers, the construction team adopted a method of breaking them down into smaller parts and transporting them to the mountaintop for assembly. The first assembled transformer weighed 350 tons, and workers used four 200-ton jacks to move it piece by piece to its designated location and finally place it in place. The energy for the Aba UHV substation comes entirely from clean energy sources in Aba Prefecture. Once completed, the clean energy from the Shuangjiangkou and Jinchuan hydropower stations upstream will be boosted to 1000 kV via the Aba UHV substation and then transmitted to the Chengdu-Chongqing region and even the whole country via UHV lines. The substation can transmit 15 billion kilowatt-hours of electricity annually, equivalent to the annual electricity consumption of 8 million households. It is precisely because of the establishment of the UHV project that clean energy can be transmitted across regions to areas with peak electricity consumption, entering production and daily life. Electricity can also be "precisely delivered": What does the new power grid look like? In the next five years, Sichuan plans to add over 50 million kilowatts of new energy installed capacity. The intermittency and volatility of new energy sources place higher demands on the grid's carrying capacity, dispatching, and absorption capacity. Traditional grids cannot directly support a high proportion of new energy access, making the construction of a more robust and intelligent new power grid imperative. What exactly does this grid look like? The new power grid is based on the main grid and distribution network, supplemented by smart microgrids, forming a "main-distribution-micro" coordinated power grid system. The main power grid is like a highway, the core component connecting large power plants and distribution networks, undertaking the transmission and dispatch of large-capacity electricity across regions. The distribution network is like the roads within a city, connecting the main grid and end users, responsible for voltage reduction, distribution, and delivery of electricity. To avoid congestion, a more accessible and flexible road network is needed. How should it be built, and where? CCTV Reporter Li Zhen: You can imagine the intelligent cable tunnel located about 10 meters underground in Chengdu as a "dormitory" for cables. Multiple high-voltage cables neatly "live" in the same tunnel, but go in different directions. Inspection robots, video monitoring, and 12 types of intelligent equipment transform this cable dormitory into a smart operation and maintenance "comprehensive complex." Through the "grid-based" urban power distribution network, each grid can independently supply power and support each other, significantly improving the safety and reliability of the power grid. Xie Weilin, Deputy Dire...