特高压变电站无功装置主断路器合闸控制优化改进及效益评估

Optimization Design and Benefit Assessment of Main Circuit Breaker Closing Control for Reactive Power Device in UHV Substation

特高压电网中的无功补偿装置具有无功输出容量大、运行电压高等特点,其特殊性和重要性对投切电容器组的断路器合闸回路可靠性提出了更高要求。笔者提出了特高压变电站中110 kV电容器组专用断路器的合闸控制回路改进方法,采用双合闸控制回路并配置专用信号回路,该种方法可有效改善电容器组断路器合闸控制回路故障频发,提升特高压电网无功补偿装置运行可靠性。

Considering the features of the reactive power compensation device in ultra high voltage power grid, such as large reactive power output capacity and high operation voltage, the improvement of the special circuit breaker＇s closing control loop of the 110 kV capacitor-bank in a UHV substation is proposed. In the method, double-switching control circuit and a special signal circuit are adopted to diminish frequent occurrence of the faults in the capacitor-bank circuit breaker＇s control loop,and to enhance operation reliability of reactive power compensation device of ultra-high voltage power grid.