電流互感器內(nèi)置防開路模塊故障分析與選型策略
夏鑫，吳秋亮，周世鋼
(江蘇南瑞帕威爾電氣有限公司，江蘇 南京 211100)
摘 要：針對(duì)近年某地區(qū)一起一二次融合 ZW32-12 型柱上斷路器的故障進(jìn)行了技術(shù)分析與試驗(yàn)驗(yàn)證，通過錄波數(shù)據(jù)查找事故原因，發(fā)現(xiàn)故障發(fā)生的根本原因是電流互感器內(nèi)置防開路模塊啟動(dòng)電壓的設(shè)計(jì)余量小。闡述了防開路模塊的作用和原理，通過理論計(jì)算和試驗(yàn)驗(yàn)證給出了防開路模塊啟動(dòng)電壓的設(shè)計(jì)依據(jù)。經(jīng)更換合理啟動(dòng)電壓的防開路模塊及時(shí)避免同類故障的再次發(fā)生，提升柱上斷路器的入網(wǎng)質(zhì)量，保障了配網(wǎng)的安全穩(wěn)定運(yùn)行。
關(guān)鍵詞： 一二次融合柱上斷路器；電流互感器；防開路模塊；伏安特性；選型策略
中圖分類號(hào)：TM452 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：1007-3175(2024)07-0053-04
Fault Analysis and Selection Strategy of Built-In Anti-Open
Circuit Module of Current Transformer
XIA Xin, WU Qiu-liang, ZHOU Shi-gang
（Jiangsu NARI Power Electric Co., Ltd, Nanjing 211100, China）
Abstract: In recent years, a primary and secondary fusion ZW32-12 type pole circuit breaker failure was technically analyzed and verified by experiments. The accident cause was searched through the recorded wave data, it was found that the root cause of the fault was the small design margin of the starting voltage of the built-in anti-open circuit module of current transformer. In this paper, the function and principle of anti-open circuit module are briefly described, and the design basis of starting voltage of anti-open circuit module is given through theoretical calculation and experimental verification. Replacing the anti-open circuit module with reasonable starting voltage to avoid the recurrence of similar faults in time, and improve the network access quality of the circuit breaker on the column, thus ensuring the safe and stable operation of the distribution network.
Key words: primary and secondary fusion column circuit breaker; current transformer; anti-open circuit module; volt-ampere characteristic;selection strategy
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