Research on Switch Type Series Compensation of Distribution Network

Due to the relatively small population density of the 10kV and 35kV rural power grids and the 35kV high-voltage power grids in most parts of Northwest, Inner Mongolia and Northeast China, the power load is relatively scattered and fluctuates, and long-distance power transmission is common. The resulting voltage quality problem at the end of the load is serious, especially when the heavy load starts and stops, the voltage fluctuation problem is particularly prominent. At present, to solve this problem, most of the parallel compensation measures are adopted, and the effect is extremely limited. However, the conventional series compensation device has a good effect, due to the complexity of the technology, the high price and the bulky volume, it cannot be widely promoted and applied in the 10kV-110kV power grid. State Grid Inner Mongolia Eastern Electric Power Company is located in the northeast, and the above-mentioned voltage problems of the 10kV-35kV power grid are prominent. State Grid Inner Mongolia Eastern Electric Power Company organized relevant departments and experts to conduct extensive investigations. It is understood that the current fast vacuum circuit breaker developed based on fast eddy current drive technology can achieve a closing time of about 10ms, and the opening time can be controlled within 5ms, and the use of high-energy capacity zinc oxide groups has been widely used in China. If fast vacuum circuit breakers and high-energy capacity zinc oxide are used in high and medium voltage series compensation devices, the problems of large area, complex equipment structure and high cost of series compensation devices will be solved.