电抗器过电压吸收装置应用分析

针对变电站电抗器投切过程中易产生过电压,导致真空断路器爆炸、烧毁等问题,分析了投切电抗器时过电压产生的机理及常规治理措施的不足。提出通过在电抗器加装过电压吸收装置,达到限制过电压水平、减少过电压对真空断路器冲击的目的。在锡林郭勒电业局220 kV高力罕变电站串联电抗器及220 kV玉龙变电站并联电抗器加装过电压吸收装置后,有效降低了电抗器投切时的过电压水平。

Analysis of Overvoltage Absorbing Device for Reactor and Its Application

In order to solve the problems such as overvoltage,explosion and burnout of vacuum circuit breakers in the switching process of substation reactors,this paper analyzes the mechanism of over-voltage in switching reactors and the deficiency of conventional measures.Put forward installing the overvoltage absorbing device onto the reactor to reduce the overvoltage level and the impact of overvoltage on vacuum circuit breaker.After installing overvoltage absorption devices for the series reactors at 220 kV Gaolihan substation and parallel reactors at 220 kV Yulong substation,the overvoltage level and its impact on the vacuum circuit breaker are reduced effectively.