串聯型動態電壓調整器之研究

Design of a Series-type Dynamic Voltage Regulator

吳勝隆(Sheng-Lung Wu)

指導教授 ： 許源浴

國立臺灣大學/電機資訊學院/電機工程學研究所/碩士(2004年)

https://doi.org/10.6342/NTU.2004.01469

摘要

電力品質對產業用電影響極大，供電品質不良易造成敏感設備損壞，導致工廠損失，因此本文對電壓驟降及電壓變動等問題提出改善之方法，達到系統電壓穩定，以提供高品質之電力給工業用戶。
本論文之目的在分析及設計動態電壓調整器(Dynamic Voltage Regulator，DVR) 。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。論文中主要針對動態電壓調整器在穩態及暫態兩方面之特性進行研究。在穩態方面，由動態電壓調整器來補償線路電抗所造成的壓降，提高電壓之穩定性。在暫態方面，使用感應馬達為負載來驗證動態電壓調整器的補償能力及速度，確保在短時間內補償暫態壓降。模擬方面使用PSCAD 軟體來評估系統補償效果；實驗方面採用數位式控制架構，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配電系統中之應用，確實可以有效維持系統電壓之穩定性。

關鍵字

電壓源變流器 ； 動態電壓調整器

並列摘要

The power quality affects the industry to a great extent. Poor quality in the power supply, such as voltage fluctuations, may cause damage in sensitive equipments. How to maintain constant voltage profile at the load bus under disturbance conditions is of major concern in this work.
The purpose of this thesis is to analyze and design the Dynamic Voltage Regulator (DVR). 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. Both steady-state performance and transient characteristic of the DVR are investigated in the thesis. In steady-state, DVR can be used to compensate the voltage drop caused by circuit reactance. In transient state, voltage sag in the load bus can be improved in a very short period by the proposed DVR.
The effectiveness of the designed DVR is first investigated by digital simulations using the PSCAD 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

DVR ； VSI

參考文獻

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