根据 EDA实验室的实际采样数据，分析计算电压、电流、功率等信号参数。基本要求：

Ø 画出电压、电流、功率等信号的时域波形（至少4个周波）；

Ø 画出 4 个最大的谐波电压和电流的周期特性（9或10个点）；

Ø 画出电压和电流信号畸变率（失真度）的周期特性（9或10个点）。-According to EDA laboratory actual sample data, analysis and calculation of voltage, current, power and other signal parameters. Basic requirements: Draw the voltage, current, power and other signals in the time domain waveform (at least 4 cycles)　Draw four largest harmonic voltage and current cycle characteristics (9 or 10 points)　Draw voltage and current signal distortion (distortion) of the periodic nature (9 or 10 points).