線纜混合輸電線路故障區段判別用光學電流互感器
劉子寰1,羅蘇南2,王耀2,閻嫦玲2,丁曄2,李亞會1
(1 中國南方電網有限責任公司超高壓輸電公司廣州局,廣東 廣州 510405;2 南京南瑞繼保電氣有限公司,江蘇 南京 211102)
摘 要:針對海南聯網工程500 kV線纜混合輸電線路存在的故障區段難以判別的問題,介紹了一種利用柔性光學電流互感器實現對線纜混合輸電線路故障區段進行準確判別的新方法。闡述了柔性光學電流互感器的原理、構成及線纜混合輸電線路故障區段識別方案。實際應用表明,將柔性光學電流互感器用于線纜混合輸電線路能夠準確判斷故障區段,有效提高故障位置檢測速度,加快故障后系統恢復供電能力,降低維護檢修人員負擔。
關鍵詞:光學電流互感器;Faraday 磁光效應;線纜混合輸電線路;故障區段判別
中圖分類號:TM452+.94;TM726 文獻標識碼:B 文章編號:1007-3175(2020)06-0047-03
Optical Current Transducer Used in the Fault Section Discrimination for Overhead
Line-Submarine Cable Hybrid Transmission Line
LIU Zi-huan1, LUO Su-nan2, WANG Yao2, YAN Chang-ling2, DING Ye2, LI Ya-hui1
(1 EHV Transmission Company Guangzhou Bureau of China Southern Power Grid Co., Ltd, Guangzhou 510405, China;
2 Nari-Relays Electric Co., Ltd, Nanjing 211102, China)
Abstract: In order to solve the problemthat it is difficult to discriminate the faulty section of the 500 kV cable hybrid transmission line in Hainan interconnected project, this paper introduces a new method to accurately identify the faulty section of the cable hybrid transmission line using a flexible optical current transformer is introduced. The principle and structure of the flexible optical current transformer and the identification scheme of the fault section of the cable hybrid transmission line are described. Practical applications show that the use of flexible optical current transformers for cable hybrid transmission lines can accurately determine faulty sections, effectively improve the speed of fault location detection, speed up the system's ability to restore power after a fault, and reduce the burden on maintenance and repair personnel.
Key words: optical fiber current transducer; Faraday magneto optic effect; overhead line-submarine cable hybrid transmission line; fault section discrimination
參考文獻
[1] 李園園,沈軍,朱曉彤,等. 區域電網電纜—架空線混合線路故障區間判別方法及實現[J]. 江蘇電機工程,2014,33(2):64-68.
[2] 羅蘇南,曹冬明,須雷,等.500 kV直流電子式電流互感器及其應用[J]. 電工電氣,2013(9):41-44.
[3] 羅蘇南,曹冬明,王耀,等.±800 kV特高壓直流全光纖電流互感器研制及應用研究[J]. 高壓電器,2016,52(10):1-7.
[4] 羅蘇南,王耀,丁曄,等. 柔性直流輸電用±500 kV直流全光纖電流互感器研制及測試[J]. 高壓電器,2017,53(6):48-55.
[5] 黃建華,王佳. 光學電流互感器的關鍵技術[J]. 電力自動化設備,2009,29(12):94-97.
[6] 張朝陽,張春熹,王夏霄,等. 光纖電流互感器λ/4波片溫度誤差補償[J]. 電工技術學報,2008,23(12):55-59.
[7] 張朝陽,張春熹,王夏霄,等. 數字閉環全光纖電流互感器信號處理方法[J]. 中國電機工程學報,2009,29(30):42-46.