Suzhou Electric Appliance Research Institute
期刊號: CN32-1800/TM| ISSN1007-3175

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基于補償?shù)碾娙萜髯杩贡Wo(hù)方法

來源:電工電氣發(fā)布時間:2021-03-26 13:26 瀏覽次數(shù):744
基于補償?shù)碾娙萜髯杩贡Wo(hù)方法
 
鄧鑫,丁力,王萬純,陳建松,王天偉
(南京南瑞繼保電氣有限公司,江蘇 南京 211102)
 
    摘 要:不平衡保護(hù)作為電容器的主保護(hù),存在使用范圍受限、對稱故障無法識別的問題。提出了基于補償?shù)碾娙萜髯杩贡Wo(hù)方法,該方法適用范圍廣,特征量可監(jiān)測且無死區(qū),可作為不平衡保護(hù)的后備保護(hù)或單獨使用。介紹了以阻抗偏差率為特征量的阻抗保護(hù)方法,探討了補償?shù)谋匾裕治隽遂o態(tài)補償、動態(tài)補償?shù)幕驹?,并對補償效果進(jìn)行了RTDS實驗驗證。實驗結(jié)果表明,補償后阻抗保護(hù)靈敏性、可靠性均有了顯著提升。
    關(guān)鍵詞:電容器;阻抗保護(hù);阻抗偏差率;靜態(tài)補償;動態(tài)補償
    中圖分類號:TM531.4     文獻(xiàn)標(biāo)識碼:A     文章編號:1007-3175(2021)03-0025-05
 
Compensation-Based Impedance Protection for Capacitors
 
DENG Xin, DING Li, WANG Wan-chun, CHEN Jian-song, WANG Tian-wei
(NR Electric Co., Ltd, Nanjing 211102, China)
 
    Abstract: As the main protection of capacitors, unbalance protection has the problems of limited use range and unrecognized symmetrical faults. This paper proposes a capacitor impedance protection method based on compensation. This method has a wide range of applications, feature quantities can be monitored and no dead zone, and can be used as a backup protection for unbalanced protection or used alone. This paper also introduces the impedance protection method with impedance deviation as the characteristic quantity, discusses the necessity of compensation, analyzes the basic principles of static compensation and dynamic compensation, and verifies the compensation effect by RTDS experiment. Experimental results show that after compensation, the sensitivity and reliability of impedance protection have been significantly improved.
    Key words: capacitor; impedance protection; impedance deviation rate; static compensation; dynamic compensation
 
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