Voltage sag compensation strategy for unified power quality conditioner with simultaneous reactive power injection

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• 作者：Yunfei XU ; Xiangning XIAO ; Yamin SUN…
• 关键词：Unified power quality conditioner (UPQC) ; Voltage sag ; Simultaneous reactive power injection ; Zero active power injection compensation region
• 刊名：Journal of Modern Power Systems and Clean Energy
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：4
• 期：1
• 页码：113-122
• 全文大小：3,032 KB
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• 作者单位：Yunfei XU (1)
  Xiangning XIAO (1)
  Yamin SUN (1)
  Yunbo LONG (1)
  
  1. State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing, 102206, China
  
• 刊物主题：Energy Systems; Renewable and Green Energy; Power Electronics, Electrical Machines and Networks;
• 出版者：Springer Berlin Heidelberg
• ISSN：2196-5420

文摘

Unified power quality conditioner (UPQC) holds the capability of solving power quality problems, especially shows good performance in the voltage sag compensation. In this paper, a compensation strategy based on simultaneous reactive power injection for UPQC (namely UPQC-SRI) is proposed to address the issue of voltage sag. The proposed UPQC-SRI determines the injection angle of compensation voltage with consideration of optimal configuration of UPQC current-carrying. Moreover, the compensation strategy also considers the current-carrying limit of UPQC, and then the zero active power injection region of UPQC-SRI (also called UPQC-SRI region) is obtained. Under the conditions which exceed the UPQC-SRI region, the limit value of shunt current is determined by this proposed strategy. Finally, the proposed strategy and the corresponding algorithm are verified under the PSCAD/EMTDC platform. The result indicates the proposed UPQC-SRI strategy in this paper can provide more persistent voltage sag compensation than the previous strategies for the sensitive load. Keywords Unified power quality conditioner (UPQC) Voltage sag Simultaneous reactive power injection Zero active power injection compensation region