高压断路器KEMA电弧模型改进研究

摘要

The expressions of classic Mayr and Cassie arc models are introduced and a detailed description of the KEMA arc model of circuit breaker based on Mayr-Cassie model is given. As the establishment of KEMA arc model is not easy and its calculation complicated, an improved model of same accuracy is achieved by making some mathematical transformation of the original one. The genetic algorithm is used to determine its parameters and a corresponding model is built in PSCAD/EMTDC. The simulative results are compared with those of the original model,as well as the measured data,which proves that,the proposed model can simulate in EMTDC the cut-off arc of high-voltage current breaker more accurately.%介绍了经典Mayr和Cassie电弧模型表达式,详细描述了基于Mayr-Cassie模型的KEMA型断路器电弧模型.在不改变原模型精度的情况下,针对KEMA模型计算过程复杂且不易于建模的缺点,对原模型做出了数学处理与改进.使用遗传算法确定了改进模型中的参数,并在PSCAD/EMTDC暂态电磁仿真软件中建立了相应的模型.对所建立的模型进行仿真,对比了测量数据、原模型仿真数据及改进模型仿真数据.对比结论证明该模型能在EMTDC下较准确地模拟高压断路器的开断电弧.