交流控制回路感應電壓計算分析與故障處理
李學龍,劉德龍,桂松
(雅礱江流域水電開發(fā)有限公司,四川 成都 610051)
摘 要:交流控制回路間存在感應電壓,嚴重情況下感應電壓會影響被控元件的可靠動作,影響設(shè)備正常運行。分析了交流控制回路感應電壓產(chǎn)生的原因,結(jié)合某水電站地下廠房加壓送風風機控制回路中接觸器無法釋放的問題,提出消除感應電壓的三種方法,并進行計算分析,通過并聯(lián)電容的方法解決現(xiàn)場問題,該故障處理方法可行有效。
關(guān)鍵詞: 感應電壓;接觸器;RLC 電路;故障處理
中圖分類號:TM572 文獻標識碼:B 文章編號:1007-3175(2023)05-0036-04
Analysis and Troubleshooting of Induced Voltage in AC Control Circuit
LI Xue-long, LIU De-long, GUI-Song
(Yalong River Hydropower Development Co., Ltd, Chengdu 610051, China)
Abstract: The induced voltage exists in AC control circuits, and it may affect the reliable actions of controlled components to disturb the normal operation of equipments in some serious cases. First, the paper analyzes the causes of induced voltage in AC control circuits. Then, it takes the release problem of a contactor in the control circuits occurring to the pressurization fan in the underground powerhouse of a hydropower station as the research object, and proposes three methods to eliminate the induced voltage. After calculation and analysis, the paper chooses the method of parallel capacitors to solve the release problem, which verifies this troubleshooting method feasible and effective.
Key words: induced voltage; contactor; RLC circuit; troubleshooting
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