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提出一种基于畸变电流有效值最小原理的谐波和无功电流检测新方法，并利用负反馈原理实现了基于该方法的检测电路。该方法不仅适用于单相，也适用于三相电路。
A novel harmonic and reactive current detection method based on the minimum principle of distortion current RMS is proposed. The detection circuit based on this method is implemented by the principle of negative feedback. This method is not only suitable for single-phase, but also for three-phase circuits.