用於感應發電機互聯電力系統動態電壓調整器之設計

隨著環保意識的抬頭，再生能源也逐漸受到重視，例如風力感應發電機系統即為其中一種方式。而三相感應發電機則成為動力的主要來源。但由於感應機本身具有電壓調整能力不佳的缺點，因此除了在風力發電外，常常不會被當作發電機使用。本論文之目的在分析及設計動態電壓調整器（Dynamic Voltage Regulator，DVR），來提供系統無效電力，以調整系統電壓改善電壓品質。此補償器為串聯型之架構，連接一直流電容器提供電壓來源，使用脈波寬度調變技術完成三相電壓源型變流器之設計。論文中針對皆有感應發電機之電力系統在遭遇接地故障及負載變動的情況下所造成的電壓變動，利用動態電壓調整器來穩定系統電壓。模擬方面使用Matlab_Simulink軟體來評估電壓補償效果；實驗方面，以個人電腦為基礎，配合研華公司PCL-1800資料擷取卡，透過軟體運算產生三相脈波調變訊號，達成電壓補償控制。最後由模擬及實驗結果來驗證動態電壓調整器在互聯系統中之應用，確實可以有效維持系統電壓之穩定性。

關鍵字

感應發電機；動態電壓調整器；互聯系統；感應機

並列摘要

As the issue of environmental protection receives increasing attention, renewable energy source, such as wind turbine-induction generator system, is getting more and more important. Three phase induction generators provide the desired electric power in a wind energy conversion system. Induction machines are not commonly employed as generators except in the case of wind farms due to their unsatisfactory voltage regulation. The purpose of this thesis is to analyze and design the Dynamic Voltage Regulator(DVR) for a wind energy conversion system with an induction generator. This compensator employs a direct current capacitor to offer the voltage source and uses the pulse-width modulation technology to adjust the output voltage of the three-phase voltage-sourced inverter. Dynamic responses for a grid-connected induction generator subject to three-phase faults and step load change are investigated in order to demonstrate the effectiveness of the proposed DVR in regulating system voltage. The effectiveness of the designed DVR is first investigated by digital simulations using the Matlab_Simulink software. Then, in the experiment, the control kernel of digital system for DVR is based on a personal computer with Adventec PCL-1800 data acquisition cards. The three-phase pulse width modulation signals are generated by computer software in order to reach the objective of voltage compensation. Finally, it is concluded from results of simulations and experiments that load bus voltage can be effectively regulated by the designed DVR.

並列關鍵字

Induction Generator ； Dynamic Voltage Regulator ； Induction machine

參考文獻

[5]. 吳勝隆, “串聯型動態電壓調整器之研究,” 台灣大學電機所碩士論文, 2004

[6]. 黃國禎, “用於不平衡電力系統串聯型動態電壓調整器之研究,” 台灣大學電機所碩士論文, 2005

[7]. 許明杰, “以最小電壓法設計串聯不平衡電壓調整器,” 台灣大學電機所碩士論文, 2005

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國際替代計量

用於感應發電機互聯電力系統動態電壓調整器之設計

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