On August 2, the author learned from the State Grid Jiangsu Yangzhou Power Supply Company that thanks to the country's first transmission phase shifter to regulate the power flow of the power grid, the maximum load of the No. 2 main transformer of the Yangzhou Baoying 220 kV Anyi Substation dropped to 4.47 10,000 kilowatts, which is less than half of the historical high level. This achievement not only effectively alleviates the pressure on Anguan Substation as the load center of Baoying City, but also ensures the high-quality and efficient power supply of Yangzhou Power Grid in summer.
Yangzhou Baoying area is rich in wind and light resources, and new energy has developed rapidly in recent years. As of the end of July, the county's new energy installed capacity reached 1.4922 million kilowatts, with annual power generation of 2.511 billion kilowatt hours. However, 92% of the new energy in the region is concentrated in the eastern suburbs, while 55% of the electricity load is distributed in the western central city. This inverse distribution of new energy generation and electricity load has led to the load of power facilities in the east and west of the region. The imbalance seriously affects the power supply security and economic operation of the power grid.
In order to solve this problem, State Grid Jiangsu Electric Power Co., Ltd. selected Baoying area as a pilot area and took the lead in carrying out the construction of a transmission phase shifter technology demonstration project. On the 110 kV tie line between Anyi substation in the main urban area of Baoying and Ping'an substation in the east, a transmission phase shifter was installed, and supporting equipment such as isolation switches, vacuum circuit breakers, and drop-out fuses were used to Ensure the intelligent and efficient flow of electric energy and the safety and reliability of the system.Li Qun, deputy director of the State Grid Jiangsu Electric Power Research Institute, said: "The transmission phase shifter is equivalent to installing a "smart valve" on the Yangzhou Baoying Power Grid, which intelligently and accurately regulates the flow of electric energy between Anyi Substation and Ping'an Substation. , which balances the load distribution between the two stations and realizes on-demand distribution of electric energy.
Through the application of power transmission phase shifters, up to 100,000 kilowatts of new energy power can be accurately transmitted to the urban center, which is equivalent to 15.9% of the total power load in Baoying area, which greatly relieves the power supply pressure of the load center and effectively reduces It reduces the frequency of overloaded power facilities and ensures the safe, stable and economic operation of the power grid.
In addition, the application of this equipment also fills the gap in the application of economical and compact power flow control technology in my country. In one year of operation, a total of 260 million kilowatt hours of new energy power has been adjusted to the power load center. The maximum load of the main transformers of the two connected substations has dropped by about 50%, and the average load difference between the main transformers has also dropped by about 50%. 40%, and also significantly increased the new energy consumption capacity of Ping An Substation, reaching approximately 100,000 kilowatts, further improving the overall operating efficiency and stability of the power grid.