变电站交流窜入直流系统时防止断路器误动作及报警电路设计  

A Design of Circuit to Prevent Breaker Malfunction and Alarm When AC Intrudes into DC System in Substation

作　　者：刘兆国 闫琪 马伸铜 张傲 胡图 尹鸿睿 LIU Zhaoguo;YAN Qi;MA Shentong;ZHANG Ao;HU Tu;YIN Hongrui(Xuzhou Power Supply Company,Xuzhou 221000)

机构地区：[1]国网江苏省电力有限公司徐州供电分公司,江苏徐州221000

出　　处：《电力安全技术》2025年第1期47-51,共5页Electric Safety Technology

摘　　要：变电站的直流电源系统发生交流电源窜入时,会使得断路器控制回路中继电器两侧电压升高,进而导致断路器误动作,造成不必要的损失与安全隐患。针对此问题,设计一种变电站交流窜入直流系统时防止断路器误动作及报警电路。该电路基于LC并联谐振原理隔离所窜入的交流电源,能够防止断路器误动作,同时还具有交流窜入报警功能,并在MATLAB/SIMULINK中仿真验证了所设计电路的有效性。When an AC power supply intrudes into a DC system in a substation,the voltage on both sides of the relay in the breaker control circuit will increase,which will cause the breaker malfunction,resulting in unnecessary losses and security risks.To solve this problem,a circuit available for preventing breaker malfunction and alarm when a AC power supply intrudes into a DC system is designed.The circuit is based on the principle ofLC parallel resonance to isolate the intruded AC power supply,which is available to prevent breaker malfunctions and possesses the function of AC intruding alarm.The effectiveness of the designed circuit is verified by simulations in the MATLAB/SIMULINK platform.

关 键 词：直流电源系统 交流电源窜入 断路器误动作 变电站 

分 类 号：TM63[电气工程—电力系统及自动化]