無橋Boost PFC在UPS中的應用研究

摘要：不間斷電源(UPS)在生活和工業中應用十分廣泛。傳統UPS電源輸入側直接接在電網上，輸入電流諧波含量高，網側輸入功率因數很低，對電網造成污染。該文提出在UPS的輸入側加入功率因數校正環節，通過無橋Boost PFC對網側電流進行控制，使網側電流跟蹤電壓相位，大大提高網側輸入的功率因數，幾乎消除了對電網的諧波污染，達到清潔使用電能的目的。本文詳細分析了無橋Boost PFC電路的工作原理，通過Matlab/Simulink進行了系統的仿真，并進行了硬件實驗，仿真和實驗結果驗證了提出方法的正確性和可行性。 敘詞：升壓 功率因數校正 雙閉環 不間斷電源 Abstract：　Uninterrupted Power Supply(UPS) is widely used in industry and life. Traditional UPS is directly connected to the grid. The harmonic content of in-current is very high. The power factor of the grid side is quit low. So it is an pollution to the grid. This article proposes an idea that increasing the power factor correction part to the input side of the UPS. Make the grid current phase following the voltage phase through the Boost PFC of free bridge. Greatly increase the PF of the grid side and almost dismiss the harmonic pollution to the grid. Realize the purpose of clean using power. This paper detailed analyzes the principle of the PFC circuit.　Make simulation of the system. The simulation and experiment results verify the correction and feasibility of the proposed method.　　 Keyword：Boost, PFC, Double loop, UPS