開關電源的小信號建模與非線性優化

摘要：對傳統開關電源的輸入電流中含有大量的諧波電流，給電網帶來嚴重的威脅，嚴重影響電網，本文通過給電壓環和電流環進行補償，并采用電流注入法建立數學模型，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，取得了很好的結果。 敘詞：開關電源，諧波電流，電流注入法，優化 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