10kV配电网铁磁谐振过电压柔性抑制方法  

A Flexible Suppression Method of Ferromagnetic Resonance Overvoltage in 10 kV Distribution Network

作　　者：柯红海 冯小兰 金辉 蔡晋 KE Hong-hai;FENG Xiao-lan;JIN Hui;CAI Jin(Sinopec Maoming Petrochemical Company,Maoming 525000,China;College of Electrical Engineering and Automation,Fuzhou University,Fuzhou 350108,China;Putian Power Supply Company,State Grid Fujian Electric Power Co.,Ltd,Putian 351100,China)

机构地区：[1]中国石油化工股份有限公司茂名分公司,广东茂名525000 [2]福州大学电气工程与自动化学院,福建福州350108 [3]国网福建省电力有限公司莆田供电公司,福建莆田351100

出　　处：《电工电气》2022年第4期26-31,共6页Electrotechnics Electric

摘　　要：配电网的铁磁谐振过电压严重影响电力设备的安全稳定运行,已有的消谐方法难以适应不同网络结构。分析了铁磁谐振过电压特征,借鉴有源滤波器技术思路,提出了中性点电压控制方案,经单相有源逆变器向系统注入零序电流,将中性点位移电压强制为零,抑制铁磁谐振。仿真结果表明,该消谐装置能够正确判断出基频谐振和单相接地故障,且只需短时作用即可有效抑制铁磁谐振,实现柔性消谐。Ferromagnetic resonance overvoltage of the distribution network impacts the safety and stability of power equipment.The current harmonic elimination method could not adapt to the different structures of the network.This research analyzed the ferromagnetic resonance overvoltage characteristics.It drew lessons from the technical idea of active filter and proposed a neutral point voltage control scheme to restrain the ferromagnetic resonance.The simulation results show that the harmonic elimination device could detect the fundamental frequency resonance and single-phase ground fault.This device can restrain the ferromagnetic resonance and realize flexible harmonic elimination immediately.

关 键 词：配电网 铁磁谐振 柔性消谐 有源逆变器 

分 类 号：TM864[电气工程—高电压与绝缘技术]