線纜混合輸電線路故障區(qū)段判別用光學(xué)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(wǎng)有限責(zé)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(lián)網(wǎng)工程500 kV線纜混合輸電線路存在的故障區(qū)段難以判別的問題,介紹了一種利用柔性光學(xué)電流互感器實現(xiàn)對線纜混合輸電線路故障區(qū)段進行準(zhǔn)確判別的新方法。闡述了柔性光學(xué)電流互感器的原理、構(gòu)成及線纜混合輸電線路故障區(qū)段識別方案。實際應(yīng)用表明,將柔性光學(xué)電流互感器用于線纜混合輸電線路能夠準(zhǔn)確判斷故障區(qū)段,有效提高故障位置檢測速度,加快故障后系統(tǒng)恢復(fù)供電能力,降低維護檢修人員負擔(dān)。
關(guān)鍵詞:光學(xué)電流互感器;Faraday 磁光效應(yīng);線纜混合輸電線路;故障區(qū)段判別
中圖分類號:TM452+.94;TM726 文獻標(biāo)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
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