一种抑制连续换相失败的关断角动态补偿控制方法  

An Extinction Angle Dynamic Compensation Control Method for Suppressing Continuous Commutation Failure

作　　者：朱龙臻 牛翀 王志冰 迟永宁 荆江平 王先为[1] ZHU Longzhen;NIU Chong;WANG Zhibing;CHI Yongning;JING Jiangping;WANG Xianwei(Xuji Group Corporation,Xuchang 461000,Henan Province,China;Xi'an XJ Power Electronics Technology Co.,Ltd.,Xi'an 710075,Shaanxi Province,China;State Key Laboratory of Operation and Control of Renewable Energy&Storage Systems(China Electric Power Research Institute),Haidian District,Beijing 100192,China;State Grid Jiangsu Power Company,Nanjing 210024,Jiangsu Province,China)

机构地区：[1]许继集团有限公司,河南省许昌市461000 [2]西安许继电力电子技术有限公司,陕西省西安市710075 [3]新能源与储能运行控制国家重点实验室(中国电力科学研究院有限公司),北京市海淀区100192 [4]国网江苏省电力有限公司,江苏省南京市210024

出　　处：《中国电机工程学报》2021年第22期7621-7630,共10页Proceedings of the CSEE

基　　金：国家电网公司科技项目(大型新能源基地采用VSC-LCC混合直流外送技术研究)。

摘　　要：为了抑制逆变侧LCC交流故障恢复过程中连续换相失败问题,该文首先借助系统稳态运行曲线对整个故障恢复过程进行分析。然后,通过理论分析证明故障恢复过程中在逆变侧VDCOL作用阶段系统不会发生换相失败,而在电流偏差控制作用阶段系统发生换相失败风险较高。基于理论分析成果,综合考虑直流电流、换相电压幅值以及换相电压偏移角影响提出一种关断角动态补偿控制方法,用以实现对连续换相失败的抑制。最后,基于PSCAD/EMTDC中CIGRE标准测试模型验证相关机理分析与抑制方法的正确性。In order to suppress the continuous commutation failure in the inverter side LCC during the AC system failure recovery process,this paper firstly analyzed the entire failure recovery process with the help of the system steady state operating curve. Secondly,theoretical derivation proved that the system would not fail in commutation during the VDCOL operation phase during the fault recovery process. At the same time, the system had a higher risk of commutation failure during the current deviation control phase. Based on the above analysis, an extinction angle dynamic compensation control method considering the influence of DC current, commutation voltage amplitude and commutation voltage offset angle was proposed to suppress continuous commutation failure. Finally,the correctness of related mechanism analysis and suppression method was verified by the CIGRE standard model in PSCAD/EMTDC.

关 键 词：连续换相失败 故障恢复过程 机理分析 动态关断角补偿 

分 类 号：TM721[电气工程—电力系统及自动化]