高可靠度感應發電機虛功補償技術之研製

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Title:	高可靠度感應發電機虛功補償技術之研製 A Reliable Reactive Power Compensator for Induction Generator
Authors:	吳晉昌張鈞涵潘俊宏
Keywords:	感應發電機虛功補償電力轉換器 induction generator reactive power compensation power converter
Date:	2006-08-08
Issue Date:	2009-08-15 19:40:45 (UTC+8)
Abstract:	鼠籠式感應發電機因為具有結構簡單且堅固、體積小、成本低、操作簡單及維護容易等優點而非常適合中低容量之風力發電系統，本計畫主要研究鼠籠式感應發電機作為風力發電系統，由於鼠籠式感應發電機缺乏一個獨立的磁場電路，所以在運轉時須注入一額外的虛功電流作為激磁，因此需要一虛功補償系統來改善功率因數。本計畫將提出由一電力電容器及一電力轉換器兩者串聯組成之虛功補償系統。該電力電容器用以提供一基本虛功量，並降低電力轉換器之耐受電壓及容量，而該電力轉換器可使本計畫所提之虛功補償系統在某一範圍內無段調整其所提供之補償虛功量，並保護電力電容器。經虛功補償系統補償後感應發電系統將產生一接近單位功因之實功送回配電系統。本計畫所提之虛功補償系統同時具有控制電路簡單之特點，由實測結果可驗證本計畫所提之虛功補償系統具有優異之性能。The squirrel-cage induction generator has the advantages of rugged construction, simple andreliable operation, less expensive and little maintenance, and it is suitable for small capacity ofpower generation. In this project, the squirrel-cage induction generator is used as a windgeneration system. Because the squirrel-cage induction generator has no an independentexcitation system, it requires a reactive power compensator to improve its power factor. A newreactive power compensator, constructed by an AC power capacitor and a power converterconnecting in series, is proposed in this project. The AC power capacitor is adapted to provide abasic reactive power and reduces the voltage rating and power capacity of the power converter.The power converter is used to adjust the compensating reactive power within a predeterminedrange and protect the AC power capacitor. The induction generation system will generate acurrent with sinusoidal waveform and in phase with the utility voltage after compensating by theproposed reactive power compensator. Hence, the input power factor is nearly unity. Moreover,the control circuit of proposed reactive power compensator is simplified. The test results areverified the ability of the proposed reactive power compensator.
Appears in Collections:	[電機工程系所] 研究計畫

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