高压断路器三相合成试验方法的研究

Three-phase synthetic test method of high voltage circuit breaker

基于前人对电流零点预测工作的研究成果,保证了电流引入时间的准确性,将单相合成试验采用的电流引入法借鉴到三相合成试验,实现三相电流并联引入.在此基础上,采用MAT-LAB/SIMULINK软件对三相合成试验线路仿真模型进行搭建,并对仿真结果做了进一步的分析研究.结果表明:首开相和两个后开相瞬态恢复电压值,及并联电流的投入时刻对实验的等价性起到至关重要的影响.因此,可以利用此仿真模型,通过对这几个参数的调节获得预期瞬态恢复电压值,节省实验投资并可为国内高压实验站进行三相合成实验提供理论依据.

Based on the work of current zero crossing forecasts, the accuracy of current introducing time was guaranteed. The current introducing method of single-phase synthetic test was adopted by three-phase synthetic test to realize three-phase current parallel introducing. The simulation model of three-phase synthetic test was performed using the commercial software MATLAB/SIMULINK. The simulation results were further analyzed. From the simulation results, it can be seen that the test equivalence is related to the transient recovery voltages of first breaking pole, two last breaking poles, and the time of shunt current introducing. Therefore, the anticipated transient recovery voltage can be obtained by the simulation model The method can reduce investment outlay of experiment and can offer the theoretical base for domestic high voltage experimental establishments.