風力發電直流電能儲存器與交流市電併聯型轉換器之研製

DC Power Storage Device and AC Grid-Connected Inverter Design for Wind Energy Systems

洪冠群(Guan-Qun Hong)

指導教授 ： 邱謙松

中原大學/工學院/電機工程研究所/碩士(2011年)

https://doi.org/10.6840/cycu201100700

摘要

本文旨在研製一具有直流電能儲存功能與市電併聯功能之風力發電轉換系統，在直流電能儲存器方面，為了將風力發電機產生的不穩定輸出電壓轉換成穩定電壓對電池進行充電，本論文使用一具有最大功率追蹤功能之低電壓大電流轉換器，能將風力發電機所產生之能量以最大的效能對電池進行充電。而在市電併聯系統方面則是將風力機產生之直流電壓轉換成交流電力輸出，本論文所採用市電併聯控制的模式為電流控制型電壓源換流器，其控制命令為市電回授電流訊號與基本參考訊號之誤差，再經由比例控制器計算出換流器之輸出電流命令，最後搭配風力發電市電併聯型之最大功率追蹤器改變電流命令大小，能使風力發電機的輸出功率以最高的效益直接饋送至市電端。系統之實現部分，本論文以風力發電模擬平台模擬實際風速，並以實際製作之400W小型風力發電系統進行測試，以驗證本論文之理論及方法。

關鍵字

市電併聯型換流器 ； 低電壓大電流轉換器 ； 最大功率追蹤 ； 風力發電機

並列摘要

Wind maximum power tracking with DC power storage and grid connected ability is developed separately in this thesis. In the first part, the DC power storage system regulates the unstable wind energy to a smoother power source in order to store the generated power into the battery stack. Moreover, the power generation is also maximized with a maximum power changer. Then, grid-connected inverter in the second part of this thesis, a current-controlled grid-connected inverter is designed to transfer the wind power energy to the AC utility grid. Furthermore, a maximum power algorithm is developed to increase the power transferred into the utility grid. Based on the current error between the utility-grid current and the maximum power reference current, a Proportional control circuit is used to synchronize and maximize the inverter current to the utility grid. Experimental performance and theoretical analysis are verified through a 400 watt wind turbine simulation platform. From the results, the DC power storage and grid connected systems are not only feasible but also show good results.

並列關鍵字

Wind power generator ； MPPT ； Grid-connected inverter

參考文獻

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