本文通过比较5个商业软件包的精确度和执行时间,研究了具有固定时间和变换时间的网络仿真方法的性能差异。包含了多个三相二极管整流器和一个PWM电压源逆变器的一系列基准实例显示:对于线性电路来说,固定时间步长法的仿真时间更短一些;然而,为了得到精确的结果,即使对于低开关频率的PWM应用都可能需要非常小的时间步长。否则,如果使用的时间步长过大,即使波形看起来是正确的,PWM逆变器控制信号也可能有严重的错误。 By comparing the accuracy and execution time of five commercial software packages, this paper studies the performance differences of network simulation methods with fixed time and changeover time. A series of benchmark examples including multiple three-phase diode rectifiers and a PWM voltage source inverter show that the fixed-time-step method simulates a shorter time for linear circuits; however, to get accurate results, even with For low switching frequency PWM applications may require a very small time step. Otherwise, PWM inverter control signals can have serious errors if the time steps used are too large, even though the waveforms appear to be correct.