火电厂继电保护系统问题分析与改进
李振华
（晋能控股山西国金电力有限公司，山西 文水 032100）
摘要： 针对一火电厂存在的继电保护系统工作效果不佳的问题，开展了火电厂继电保护系统问题分析工作。结果表
明，出现继电保护不佳的主要原因是机组脱硫烟气不能设置旁路。通过优化机组的脱硫烟气旁路及接线形式完成了供电
系统的改进工作，相较于供电系统改进之前，月平均故障次数减少了近50%，每次故障时继电保护系统均发挥了作用，
单台机组故障停机未影响另一机组的正常运行，机组有效工作时间延长了近15%，改进效果显著。
关键词： 火电厂；供电系统；继电保护系统；脱硫系统；循环水泵房
中图分类号： TM77     文献标志码： A     文章编号： 2095-0802-(2022)08-0128-03
Analysis and Improvement of Relaying Protection System in Thermal Power Plants
LI Zhenhua
(Jinneng Holding Shanxi Guojin Electric Power Co., Ltd., Wenshui 032100, Shanxi, China)
Abstract: In view of the poor working effect of relaying protection system in a thermal power plant, the analysis of relaying
protection system problems in thermal power plants was carried out. The results show that the main reason for the poor relay
protection is that the desulfurization flue gas of the unit can not be set up by bypass. Using optimization of desulfurization of flue
gas bypass and connection form to complete the improvement work of power supply system, compared with before the improvement
of the power supply system, the monthly average number of faults has been reduced by nearly 50%, and the relaying protection
system has played a role in each fault. The fault shutdown of a single unit has not affected the normal operation of another unit,
and the effective working time of the unit has been extended by nearly 15%. The improvement effect is remarkable.

Key words: thermal power plant; power supply system; relaying protection system; gas desulfurization system; circulating water
pump house