摘要：對傳統(tǒng)開關(guān)電源的輸入電流中含有大量的諧波電流，給電網(wǎng)帶來嚴(yán)重的威脅，嚴(yán)重影響電網(wǎng)，本文通過給電壓環(huán)和電流環(huán)進(jìn)行補(bǔ)償，并采用電流注入法建立數(shù)學(xué)模型，最后通過仿真和實驗兩個方面共同驗證了建立模型的實用性，取得了很好的結(jié)果。 敘詞：開關(guān)電源，諧波電流，電流注入法，優(yōu)化 Abstract：The input current to the traditional switch power supply contains much harmonic current, which may seriously endanger thegrid. The paper adopts current injection method to build mathematical modle by compensating voltage loop and current loop. Simulationand experiments verified the practicability of the model built, and a good result was reached. Keyword：Switch power supply, Harmonic current, Current injection method, Optimization