一起斷路器二次回路設(shè)計(jì)隱患分析與改進(jìn)
李榜，傅一凡，孫亞輝
(國(guó)網(wǎng)福建省電力有限公司超高壓分公司，福建 福州 350013)
摘 要：變電站內(nèi)斷路器隨著運(yùn)行年限、操作次數(shù)的增長(zhǎng)，其二次元件逐漸老化，由于設(shè)計(jì)方面考慮不足引起的弊端逐漸暴露。從一起斷路器重合閘失敗的案例引入，介紹了二次回路絕緣、缺陷復(fù)現(xiàn)等現(xiàn)場(chǎng)檢查情況，對(duì)分閘線(xiàn)圈勵(lì)磁異常原因及液壓機(jī)構(gòu)快速泄壓原因進(jìn)行了分析，最終發(fā)現(xiàn)故障源頭來(lái)自該型號(hào)斷路器二次回路設(shè)計(jì)存在接點(diǎn)間電壓互串的隱患，并針對(duì)性提出一種避免輔助開(kāi)關(guān)電壓互串的改進(jìn)措施。經(jīng)過(guò)對(duì)保護(hù)功能進(jìn)行測(cè)試，測(cè)試結(jié)果合格，表明該舉措在實(shí)際應(yīng)用中具有可操作性強(qiáng)、簡(jiǎn)單高效的優(yōu)勢(shì)，為老舊設(shè)備消除缺陷、排除故障提供了一種新方法，也為新設(shè)備設(shè)計(jì)提供了新思路。
關(guān)鍵詞： 變電站；斷路器；二次回路；電壓互串
中圖分類(lèi)號(hào)：TM561 文獻(xiàn)標(biāo)識(shí)碼：B 文章編號(hào)：2097-6623(2026)01-0056-05
Analysis and Improvement of Hidden Danger Hazard in the
Secondary Circuit Design of a Circuit Breaker
LI Bang, FU Yi-fan, SUN Ya-hui
（UHV Branch of State Grid Fujian Electric Power Co., Ltd., Fuzhou 350013, China）
Abstract: With the increase of service life and operation times of circuit breakers in substations, their secondary components gradually age, and the drawbacks caused by insufficient design considerations are gradually exposed. Starting from a case of circuit breaker reclosing failure, this paper introduces the on-site inspection conditions such as secondary circuit insulation and defect reproduction, analyzes the causes of abnormal excitation of the opening coil and rapid pressure relief of the hydraulic mechanism, and finally finds that the source of the fault is the hidden danger of voltage cross-talk between contacts in the secondary circuit design of this type of circuit breaker. A targeted improvement measure to avoid voltage cross-talk of auxiliary switches is proposed. After testing the protection function, the test results are qualified, indicating that this measure has the advantages of strong operability, simplicity and high efficiency in practical application. It provides a new method for eliminating defects and troubleshooting of old equipment, and also offers new ideas for the design of new equipment.
Key words: substation; circuit breaker; secondary circuit; voltage cross-talk
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