变电站直流系统抑制交流窜入过电压保护装置研制及应用  

Development and Application of Protection Device to Restrain AC Jacking Overvoltage in DC System of Substation

作　　者：邢钢 邢文珑 姜华 郭晓东 董鹏程 XING Gang;XING Wenlong;JIANG Hua;GUO Xiaodong;DONG Pengcheng(Inner Mongolia Power(Group)Co.,Ltd.,Ulanqab Power Supply Company,Ulanqab 012000,China)

机构地区：[1]内蒙古电力(集团)有限责任公司乌兰察布供电公司,内蒙古乌兰察布012000

出　　处：《内蒙古电力技术》2025年第1期96-100,共5页Inner Mongolia Electric Power

摘　　要：交流干扰导致的直流回路故障会引起继电保护装置的误动作,影响电力系统的安全稳定运行。对此,研制了一种新型的交流干扰过压保护装置。该装置通过调整氧化锌避雷器的接入数量来设定交流耐压值,并在交流干扰发生时通过桥式电路启动LC滤波电路,安全泄放交流分量。应用结果证明,该装置能够精确识别不同幅度的交流干扰模拟故障,有效保护和监测变电站直流系统,显著提高了电网的安全运行水平。DC circuit faults caused by AC interference may cause the misoperation of relay protection devices,which threatens the safety and stability of the system.To solve this problem,a new type of AC interference overvoltage protection device is developed.The device sets the AC withstand voltage by adjusting the access quantity of zinc oxide arresters,and activates LC filter circuit by bridge circuit when AC interference occurs,so as to release AC component safely.The experimental results show that the device can accurately identify AC interference simulation faults of different amplitudes,effectively protect and monitor the DC system of substations,and significantly improve the safety level of power grid operation.

关 键 词：变电站 直流系统 交流窜入 氧化锌避雷器 桥式电路 LC滤波 

分 类 号：TM77[电气工程—电力系统及自动化]