介绍了非正弦周期电流电路的平均功率测量原理。

The measurement principle of the average power for non sinusoidal period current circuit is introduced in this paper.

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该算法考虑了RL电路中的暂态电流，假设暂态电流含有一个按正弦规律变化的周期分量和一个按指数规律变化的非周期分量。

RL circuit is taken into consideration, in which the transient current signal includes a period component varying in sinusoidal waveform and a non-period component varying in exponential waveform.

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讨论了雷云对地放电过程中的雷电流的特性，解释了非周期雷电流产生的电磁场的特性，并用一个雷电流实例进行了分析说明。

The feature of electromagnetic wave produced on discharge process from thundercloud to ground is discussed. A non-cycle lightning current model is built to explain it.

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