全數位控制在線式UPS之模擬分析

Abstract

本論文探討單相UPS的全數位控制方法，首先對單相UPS的電路架構，進行 介紹與分析，由各種UPS電路架構優缺點比較，得到一種精簡的在線式UPS 電路架構。本文以此為基礎，介紹此UPS電路架構之特色及電路原理並發 展出此UPS的全數位控制方式， 其中包含各級電路之控制如：輸入級的交 直流轉換與功因控制、蓄電池充放電控制、以及輸出級的交流穩壓控制。 本文利用IsSpice及其工具軟體CMSDK來進行此UPS數位控制的電腦分析、 模擬，發展出完整的電路模型與以C語言為基礎的高階數位控制模擬程式 。 本文對在線式UPS的數位控制進行了系統化的模擬分析，所建立的UPS 模擬系統具有良好的發展性及使用者介面，所發展的C語言數位控制程式 具有良好的可攜性， 可適用於以DSP為基礎的UPS數位控制。 This thesis proposes a fully digital control scheme for a single-phase UPS. Through the discussions and comparisons of a diversity of single-phase on-line UPS circuit topologies, a simplified on-line UPS topology is concluded. Based on the features and operating principles of the selected UPS topology, a fully digital control scheme is developed. The control scheme consists of input AC/DC converter control, bi-directional power flow control, PFC control, battery charging/discharging control, and output AC voltage regulation control. The complete circuit models and high-level digital control simulation program based on C-language have been developed and integrated by using IsSpice and its associated toolbox CMSDK. Based on the constructed environment, extensive computer simulation and analysis of a digitally controlled UPS has been carried out.This thesis also develops a systematic simulation and analysis of fully digital controlled on-line UPS. The windows based IsSpice also provide a flexible and friendly user*s interface. The developed C-language based simulation models for digital control and can be easily integrated to control programs of advanced DSP. Simulation results show the constructed CAD environment for UPS design can greatly improve the design works for a digitally controlled on-line UPS.