对高压少油断路器多断口均压问题的分析

Analysis on Multi-break Voltage-sharing of HV Oil-minimum Breaker

高压少油断路器中,灭弧室普遍采用多断口串联式结构。在开断过程中,各断口上的电压分配出现不均匀,为了使每个灭弧室工作条件达到一致,断口间需并接均压电容,但串联的灭弧室数量太多,断口上的电压分布将会愈来愈不均匀,使断口上的均压问题更难解决。为解决这一问题,普遍采用减少串联灭弧室的数量,提高每个灭弧室的工作电压,来解决高压少油断路器断口的均压问题。

In HV oil-minimum breaker,the arc extinguish chambers usually adopt serial-type construction of multi-break. In the course of breaking,voltage on the breaks in nonuniform. In order to make the working condition of each arc extinguish chamber the same, the uniform voltage capacitance is parallelly connected between breaks,but the number of series arc extingulish chambers is too many,the voltgae that is distributed on the breaks will be more and more nonuniform making voltage-sharing on the brenks more difficault to be solved. In order to solve the problem, the number of series are extinguish chambers is qenerally reduced, increase the working voltage of each chamber solving voltage-sharing of HV oil-minimum breaker.