云南水力发电2024，Vol.40Issue(8)：140-143,4.DOI:10.3969/j.issn.1006-3951.2024.08.034
悬浮电压在大型水电厂监控系统开关量中的应用及研究
Application and Research of Suspended Voltage in the Switching Value of Monitoring System in Large Hydropower Plant
何战勇 1燕翔 1李政 1李和良 1段春晖1
作者信息
- 1. 华能澜沧江水电股份有限公司糯扎渡水电厂,云南 普洱 650005
- 折叠
摘要
Abstract
The DC voltage output by the isolation transformer is not connected to the ground,and the floating voltage measured to the ground is the floating voltage.The switching power supply for the monitoring system of large hydropower plants generally adopts a DC 24V floating voltage.Due to the ungrounded floating voltage,when a single grounding fault occurs in the switching DC circuit,it does not immediately result in consequences.When a second grounding occurs,a short circuit may occur,causing relay protection,automatic devices,switches and other malfunctions.In severe cases,it may even lead to accident shutdown.This paper studies and summarizes a set of rapid troubleshooting techniques for grounding faults in switch quantities for the application of floating voltage in the monitoring system of hydropower plants.关键词
悬浮电压/开关量/接地故障/公关端/信号端Key words
suspension voltage/switching quantity/grounding fault/public relations end/signal terminal分类
建筑与水利引用本文复制引用
何战勇,燕翔,李政,李和良,段春晖..悬浮电压在大型水电厂监控系统开关量中的应用及研究[J].云南水力发电,2024,40(8):140-143,4.
