系统侧的电压在0.04秒到0.06秒发生15％的电压跌落，在0.06 秒到0.07秒分别加入了3次和2次谐波，幅值分别为基波电压的20％和15％，相位分别为负25度和35度。-System voltage side occurs in 0.04 seconds to 0.06 seconds 15 of the voltage drop in 0.06 seconds to 0.07 seconds and 3 were added to the second harmonic amplitu