具無變壓器式變流器小型垂直軸風力發電系統之研製

本文旨在研製具無變壓器式變流器小型垂直軸風力發電系統。首先採用PSIM套裝軟體模擬整體電路架構，再依照模擬結果作為實測系統與程式控制參數調整之依據。本文系統先將風力發電機輸出之交流電轉換為直流電，再利用高增益昇壓型直流轉換器搭配擾動觀察法進行最大功率追蹤控制，使小型垂直軸風力發電機在不同風速變動下，均能維持最大功率輸出，交流側則採用電壓源電流控制型無變壓器式變流器，將直流電轉換為交流電，再與市電併聯。本文首先使用人工風洞量測風力發電機之輸出特性，擬合與建構風力發電機數學模型，利用PSIM套裝軟體完成模擬與分析，並採用數位信號處理器（TMS320F28335）作為控制核心，完成300W小型垂直軸市電併聯型風力發電系統之雛型，並以實測驗證理論之正確。

關鍵字

風力發電系統；最大功率追蹤；高增益昇壓型直流轉換器；無變壓器式變流器；市電併聯

並列摘要

This thesis focuses on development of a small vertical axis wind generation system with transformerless inverter. Firstly, the PSIM software package was used to simulate the whole system architecture, and then according to the simulation results as a basis for measurement systems and program control parameters adjustment. The AC power of wind turbine output was rectified into DC power, the perturbation and observation method was adapted to control the high-gain boost DC converter for maximum power point tracking to keep the maximum power output of small vertical axis wind turbine at different wind speed. Finally, the DC power was transformed into AC power by a single-phase full-bridge with transformerless inverter for grid connected control. The wind turbine mathematics model was built from experimental data of wind tunnel laboratory for PSIM software simulation and analysis. Based on simulation results, a digital signal processor (DSP, TMS320F28335) was used to implement a 300W grid-connected small-scaled vertical axis wind power generation system prototype to verify the theory.