單相全橋零電壓整流無變壓器式市電併聯型變流器之研製

本論文旨在研製單相全橋零電壓整流無變壓器式市電併聯型變流器，以解決市電併聯型變流器共模電壓變動及洩漏電流問題。本論文首先模擬驗證各種無變壓器式變流器之共模電壓特性，完成1kW單相全橋零電壓整流無變壓器式市電併聯型變流器製作，所有控制均以軟體程式完成，以降低成本及提高系統的可靠度。本論文之控制法則均以Psim套裝軟體作計算機模擬及分析，以電流控制法控制單相全橋式變流器以達到市電併聯的功能，配合全橋整流器作零電壓狀態控制，以達到固定的共模電壓輸出及抑制洩漏電流的目的。本論文以數位信號處理器(TMS320F28335)為控制核心，完成單相110V，60Hz，1kW容量全橋零電壓整流無變壓器式市電併聯型變流器之雛型，並完成測試以驗證理論之分析，而變流器轉換效率可達到94.9%以上。

關鍵字

共模電壓；市電併聯型變流器

並列摘要

This thesis focuses on design and implementation of a single-phase H-bridge zero voltage rectifier grid-connected transformerless to overcome common-mode voltage variable and leakage current problems of the grid-connected transformerless inverter. First, the common-mode voltage characteristics of various transformerless inverters were simulated and verified, then a 1kW single-phase H-bridge zero voltage rectifier grid-connected transformerless inverter was implemented. All the control methods were finished by software to reduce the cost and improve the reliability of the system. In this thesis, the control algorithms of the proposed system was simulated and analyzed by the Psim software first. The current control method was adopted to control the single-phase full-bridge inverter for grid connection function and the zero-voltage status was used to control the full-bridge rectifier to obtain a fixed common mode voltage for suppressing leakage current of the inverter. A digital signal processor (DSP, TMS320F28335) was used to implement a 1kW, 110V, 60Hz, prototype single-phase H-bridge zero voltage rectifier grid-connected transformerless inverter. Experiment then was conducted to justify the analysis. The prototype inverter conversion efficiency can reach 94.9%.