高压限流熔断器的过电压动态仿真与数值计算

Numerical Calculation and Dynamic Simulation of the Overvoltage during the Breaking Progress for the High Voltage Current Limiting Fuse

以高压限流熔断器短路试验系统为研究主体,用MATLAB建立了动态仿真模型对熔断器熔断过程进行仿真。建立了用于电磁暂态过程计算的数值计算模型,运用半隐半显格式的Callahan算法分析计算了熔断器的开断过电压,得到了过电压波形。仿真波形与计算波形均与实际试验波形基本吻合,充分说明两种方法的正确性,它们可以较好地模拟出熔断器短路试验时的开断过电压情况,还可用于其它非线性电路过电压的求解以及电磁暂态过程的计算。

Aiming to the short circuit test system, this paper discussed the generation mechanism of the overvohage during the breaking progress for the high voltage current limiting fuse and set up a dynamic simulation model to simulate the breaking progress of the fuse based on MATLAB. A numerical calculation model was established for electromagnetic transient progress. A great deal of calculations of the overvoltage were carried out by using Callahan algorithm. The resuits were almost the same as the fact. It illuminates that the two methods are both correct. The breaking voltage of the high voltage current limiting fuse in short circuit test can be simulated using the two methods. They can also be used to calculate the overvohage of the other nonlinear circuit and electromagnetism transient process.