基于補償?shù)碾娙萜髯杩贡Wo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:不平衡保護作為電容器的主保護,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),可作為不平衡保護的后備保護或單獨使用。介紹了以阻抗偏差率為特征量的阻抗保護方法,探討了補償?shù)谋匾裕治隽遂o態(tài)補償、動態(tài)補償?shù)幕驹恚ρa償效果進行了RTDS實驗驗證。實驗結(jié)果表明,補償后阻抗保護靈敏性、可靠性均有了顯著提升。
關(guān)鍵詞:電容器;阻抗保護;阻抗偏差率;靜態(tài)補償;動態(tài)補償
中圖分類號:TM531.4 文獻標識碼: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
參考文獻
[1] SAMINENI S, LABUSCHAGNE C, POPE J.Principles of shunt capacitor bank application and protection[C]//2010 63rd Annual Conference Protective Relay Engineers, 2010.
[2] 胡旌杰,譚建成. 并聯(lián)電容器保護研究[J]. 電氣開關(guān),2012,50(5) :38-42.
[3] 吳婭妮,呂鵬飛,王德林,等. 交流濾波器高壓電容器不平衡保護新原理[J]. 電力系統(tǒng)自動化,2008,32(24) :56-59.
[4] 黃旭東. 電力電容器保護探討[J]. 電力電容器與無功補償,2009,30(3) :48-50.
[5] 肖遙,張晉寅,楊曉峰,等. Ⅱ型接線濾波電容器組不平衡電流保護判據(jù)及定值[J]. 電力系統(tǒng)自動化,2015,39(22) :137-144.
[6] 梅念,李銀紅,陳東,等.HVDC工程交/ 直流濾波器高壓電容器不平衡保護的判據(jù)研究[J]. 電網(wǎng)技術(shù),2011,35(12) :229-234.
[7] 朱韜析,王寧寧,郭衛(wèi)明,等. 交流濾波器電容器不平衡保護在南方電網(wǎng)直流輸電系統(tǒng)中的應(yīng)用[J].電力系統(tǒng)保護與控制,2010,38(20) :102-105.
[8] 余江,周紅陽,趙曼勇. 高壓電容器不平衡保護的相關(guān)問題[J]. 電力系統(tǒng)自動化,2006,30(13) :85-89.
[9] 張建軍,袁繼軍,孫紅華,等.35 kV及以上并聯(lián)電容器裝置保護方式研究[J]. 電力電容器與無功補償,2014,35(5) :16-20.
[10] MOXLEY R, POPE J, ALLEN J. Capacitor bank protection for simple and complex configurations[C]//2012 65th Conference for Protective Relay Engineers, 2012.
[11] KASZTENNY B, MCGINN D, VOLOH I.Enhanced Adaptive Protection Method for Capacitor Banks[C]//2008 Iet 9th International Conference on Developments in Power System Protection, 2008.
[12] 陶梅,江鈞祥. 自愈式并聯(lián)電容器加速壽命試驗方法探討[J]. 電力電容器,2007(1) :41-43.
[13] 王紫琪,和敬涵,王小君,等. 考慮溫度因素的特高壓并聯(lián)電容器雙橋差不平衡電流保護整定方法[J]. 電力系統(tǒng)保護與控制,2016,44(22) :82-88.
[14] KASZTENNY B, SCHAEFER J, CLARK E.Fundamentals of adaptive protection of large capacitor banks[C]//2007 Power Systems Conference: Advanced Metering, Protection, Control, Communication, and Distributed Resources, 2007.