基于换流母线电流负序二次谐波分量的换相失败检测方法  

Detection Method for HVDC Commutation Failure Based on Negative Sequence Second Harmonic Component of Current

作　　者：孟祥宇 李晓华[1] 李昊 王玉麟 Meng Xiangyu;Li Xiaohua;Li Hao;Wang Yulin(School of Electric Power Engineering,South China University of Technology,Guangzhou Guangdong 510641,China)

机构地区：[1]华南理工大学电力学院,广东广州510641

出　　处：《电气自动化》2023年第5期46-49,56,共5页Electrical Automation

基　　金：国家自然科学基金委员会-国家电网公司智能电网联合基金项目(U1766213);国家自然科学基金(51677073)。

摘　　要：高压直流输电工程中缺乏一种准确、可靠、快速检测换相失败的方法。为此,分析了高压直流输电换相失败时母线电流的特征,提取负序二次谐波电流作为特征量并研究其影响因素,提出了基于换流母线负序二次谐波分量的换相失败检测方法。在电磁暂态仿真平台PSCAD/EMTDC中,基于工程模型搭建了换流母线负序二次谐波分量的换相失败检测模块。试验结果表明,所提方法能有效、准确及可靠地检测出换相失败,验证了理论分析的正确性。In response to the issue of the lack of a precise,dependable,and swift method for detecting commutation failure in high voltage direct current(HVDC) transmission projects,an analysis was conducted on the characteristics of the bus current during commutation failure in such projects.The negative-sequence second harmonic current was identified as a key feature and its influencing factors were examined,leading to the proposal of a commutation failure detection method based on the negative-sequence second harmonic component of the commutation bus.To validate the proposed method,a commutation failure detection module was constructed using an engineering model on the PSCAD/EMTDC electromagnetic transient simulation platform.The experimental results demonstrate that the proposed method is effective,precise and dependable in detecting commutation failure,thereby confirming the accuracy of the theoretical analysis.

关 键 词：高压直流输电 换相失败 负序分量 二次谐波 检测方法 

分 类 号：TM721[电气工程—电力系统及自动化]