正常运行厂变供电LGA模式下铁磁谐振抑制措施有效性研究  

Study on the Effectiveness of Ferroresonance Suppression Measures in LGA Mode of Plant Transformer Power Supply Under Normal Operation

作　　者：徐万长 李岚 刘俊峰 刘涛 张扬 XU Wanzhang;LI Lan;LIU Junfeng;LIU Tao;ZHANG Yang(Yunnan Electric Power Technology Co.,Ltd.,Kunming 650217,China;Fujian Strait Enterprise Management Service Co.,Ltd.,Kunming 650000,China)

机构地区：[1]云南电力技术有限责任公司,云南昆明650217 [2]福建海峡企业管理服务有限公司云南分公司,云南昆明650000

出　　处：《电工技术》2025年第5期171-174,共4页Electric Engineering

摘　　要：铁磁谐振过电压常出现在核电厂中压系统中,会影响系统供电的可靠性与稳定性。针对某核电厂厂用电厂变供电1LGA模式下铁磁谐振的不同抑制措施问题,从铁磁谐振的激发试验开始,通过二次消谐电阻消谐效果试验、微机消谐器消谐效果试验、PT热容量试验、PT短路承受能力试验,验证了随机选择PT组合搭配、励磁特性最差及各相相差最大组合、励磁特性最好及各相相差最小组合等不同情况下铁磁谐振抑制措施的有效性。Ferroresonance overvoltage often occurs in medium voltage system of nuclear power plant,which will affect the reliability and stability of power supply system.This paper aims at the different suppression measures of ferromagnetic resonance under the 1LGA mode of variable power supply for a nuclear power plant.Starting from the excitation test of ferromagnetic resonance,through the test of secondary detuning resistance detuning effect,the test of microcomputer detuning effect,the test of PT heat capacity and the test of PT short circuit endurance.The effectiveness of ferroresonance suppression measures is verified under different conditions,such as random selection of PT combinations,combinations with the worst excitation characteristics and the largest phase difference,and combinations with the best excitation characteristics and the smallest phase difference.

关 键 词：核电站 中压系统 PT铁磁谐振 LGA模式 抑制措施 

分 类 号：TM623[电气工程—电力系统及自动化]