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

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直流光電流互感器故障分析及整改措施研究

來源:電工電氣發(fā)布時(shí)間:2021-12-16 10:16 瀏覽次數(shù):482

直流光電流互感器故障分析及整改措施研究

馬洪灼1,曾子安2,吳小東1,申狄秋1,樊友平2
(1 中國(guó)南方電網(wǎng)有限責(zé)任公司超高壓輸電公司柳州局,廣西 柳州 545000;
2 武漢大學(xué) 電氣與自動(dòng)化學(xué)院,湖北 武漢 430072)
 
    摘 要:隨著昆柳龍多端混合直流輸電工程投入運(yùn)行,光電流互感器 (純光CT) 的故障率也逐漸變高。介紹了直流純光 CT 的結(jié)構(gòu)以及工作原理,分析了昆柳龍直流輸電工程使用的純光 CT 在運(yùn)行中發(fā)生的問題,進(jìn)行了通斷測(cè)試、局放試驗(yàn)及解體測(cè)試,并在 ANSYS 軟件中進(jìn)行建模,使用有限元方法對(duì)其電場(chǎng)進(jìn)行仿真計(jì)算。結(jié)合試驗(yàn)以及仿真結(jié)果,提出了增大絕緣管的壁厚、增加均壓環(huán)等整改措施,為以后純光 CT 的設(shè)計(jì)提供了參考。
    關(guān)鍵詞:光電流互感器;混合直流輸電;故障分析;整改措施
    中圖分類號(hào):TM452+.93     文獻(xiàn)標(biāo)識(shí)碼:B     文章編號(hào):1007-3175(2021)12-0031-05
 
Study on Fault Analysis and Remedial Measures of DC Pure Optical CT
 
MA Hong-zhuo1, ZENG Zi-an2, WU Xiao-dong1, SHEN Di-qiu1, FAN You-ping2
(1 China Southern Power Grid EHV Transmission Company Liuzhou Bureau, Liuzhou 545000, China;
2 School of Electrical Engineering and Automation, Wuhan University, Wuhan 430072, China)
 
    Abstract: The failure rate of pure optical CT has gradually increased during the Kunliulong multi-terminal hybrid DC transmission project’operation.This article introduced the structure and working principle of DC pure optical CT, analyzed the problems that emerged in the operation of the pure optical CT used in the Kunliulong DC transmission project. Besides, it conducted many tests, such as continuity test,partial discharge test, and disassembly test. Furthermore, it built a model in ANSYS software and did a simulated experiment for its electric field by using the finite element method.This work combines the results of experiments and simulations. Many remedial measures are proposed,such as increasing the wall thickness of the insulating tube and increasing the equalizing ring. Overall, it provides a reference for the design of pure optical CT in the future.
    Key words: pure optical CT; hybrid DC transmission; fault analysis; remedial measure
 
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