中国电机工程学报2025，Vol.45Issue(18)：7136-7148,中插10,14.DOI:10.13334/j.0258-8013.pcsee.240536
计及电磁式电流互感器测量环节高频特性的柔性直流输电孤岛空载建模与谐振机理分析
Modeling and Resonance Mechanism Analysis of MMC-HVDC Under Unload Condition Considering the High Frequency Characteristics of Electromagnetic Current Transformer Measurement Link
摘要
Abstract
During the operation of Zhangbei Renewable Energy flexible DC power grid demonstration project,high frequency resonance occurred many times in Kangbanuoer Island converter station under no-load condition.To solve this problem,we firstly consider the dynamic characteristics of electromagnetic current transformer measurement loop in modeling,obtain π-type equivalent circuit for the current measurement link of the cable,and build a mathematical model of flexible HVDC island absorbing new energy system with current measurement link under no-load condition.Secondly,the stability of the above mathematical model is analyzed,and the mechanism of high frequency resonance in the converter station under no-load condition is proposed.Then we conduct simulation and field test,which demonstrate the accuracy of the new energy system model and the rationality of the high frequency resonance mechanism of the island converter station caused by the measurement link of the current transformer.At the same time,the suppression measures of high frequency resonance are proposed,which are verified by simulation and field test.The research can provide important technical guidance for MMC-HVDC projects,and has great practical significance.关键词
柔性直流输电/张北柔直工程/孤岛/电流测量环节/高频谐振Key words
MMC-HVDC/Zhangbei flexible DC project/isolated island/current measuring link/high frequency resonance分类
信息技术与安全科学引用本文复制引用
胡应宏,沈禹辰,尹光祖,李雨,卢毅..计及电磁式电流互感器测量环节高频特性的柔性直流输电孤岛空载建模与谐振机理分析[J].中国电机工程学报,2025,45(18):7136-7148,中插10,14.基金项目
国网冀北电力有限公司科技项目(52018K22001C).The Science and Technology Project of State Grid Jibei Electric Power Co.,Ltd.(52018K22001C). （52018K22001C）
