基于PSASP的高压交流SF_6断路器触头电寿命及电磨损建模仿真研究

Modeling and simulation research on electrical life and electrical wear of AC high voltage SF_6 circuit breaker contact based on PSASP

电力系统的三相短路和两相短路接地故障对断路器触头的电气寿命有重要影响。应用电力系统分析软件包(PSASP)建立了各元件的数学模型及仿真模型,模拟了不同短路故障后断路器的动态状态。仿真结果表明,触头电磨损量与短路故障类型和短路点位置有关,短路电流的大小直接影响断路器触头的电磨损量和电寿命。

Three-phase short-circuit and two-phase short-circuit grounding faults in power system have significant influence on the electrical life of circuit breaker contacts. The mathematical model and simulation model of each component are established by using Power System Analysis Software Package （PSASP）, and the dynamic state of the circuit breaker under different short-circuit fault conditions are simulated. The simulation results show that the contact electrical wear is related to the type of short-circuit fault and the location of short-circuit point. The value of short circuit current directly affects the electrical wear quantity and electrical life of circuit breaker contact.