交流电窜扰直流母线对微机综保的影响及对策探讨  

Influence of AC Interference to DC Bus on Integrated Protection of Microcomputer and Countermeasures

作　　者：高嵩 GAO Song(Sinopec Zhongyuan Petrochemical Co.,Ltd.,Puyang 457000,China)

机构地区：[1]中国石化中原石油化工有限责任公司,河南濮阳457000

出　　处：《电工技术》2024年第13期112-114,共3页Electric Engineering

摘　　要：基于特定的电路参数及综保设备,分析了交流电串入变电站直流母线正负极及微机综保外部跳闸开入回路的光耦上侧时对微机继电器的影响,使用Multisim仿真模拟了交流扰动时光耦两端的电压波形,验证了理论分析的正确性,提出了对重要的跳闸回路使用大功率中间继电器进行重动的对策,对中间继电器的动作功率和动作时间的选定进行了分析,对工程应用具有借鉴意义。The study theoretically analyzes how an AC power flow penetration into positive and negative poles of the DC bus in the substation and the optocoupler of the external tripping input circuit of the microcomputer integrated protection impacts microcomputer relay based on specific circuit parameters and integrated protection equipment.Multisim simulation is used to simulate the voltage waveform at both ends of the coupling during AC disturbance,verifying the correctness of the theoretical analysis.The strategy of using high-power intermediate relays for resetting important tripping circuits is proposed,and the selection of action power and action time of intermediate relays is analyzed,which provide useful information for engineering applications.

关 键 词：交流扰动 光耦 分布电容 重动中间继电器 

分 类 号：TM774[电气工程—电力系统及自动化]