昆柳龙直流工程柳州站双阀组充电跳闸事件分析及对策  

Analysis of the Kunliulong UHVDC Tripping Event During Charging Process of High and Low Values in Liuzhou Converter Station and Countermeasure

作　　者：杨雪飞 杨绍远 李桂源 章功辽 姚日斌 杨顺建 YANG Xuefei;YANG Shaoyuan;LI Guiyuan;ZHANG Gongliao;YAO Ribing;YANG Shunjian(Liuzhou Bureau,EHV Power Transmission Company,CSG,Liuzhou,Guangxi 545006,China;State Key Laboratory of HVDC,Electric Power Research Institute,CSG,Guangzhou 510663,China)

机构地区：[1]南方电网超高压输电公司柳州局,广西柳州545006 [2]直流输电技术国家重点实验室(南方电网科学研究院),广州510663

出　　处：《南方电网技术》2022年第2期82-88,共7页Southern Power System Technology

基　　金：直流输电技术国家重点实验室科技项目(SEPRI-K183003);国家重点研发计划资助项目(2016YFB0901000)。

摘　　要：昆柳龙直流作为世界首个特高压混合多端直流工程,柔直站采用高低阀组串联结构,启动前需要依次对高、低阀组进行充电。针对昆柳龙现场调试过程发生的柳州换流站极2双阀组充电跳闸事件,首次指出后充电阀组直流侧被动充电是特高压柔性直流的特有现象,并从机理上对该现象进行分析,结合阀控充电逻辑的梳理结果,定位了跳闸事件的原因。最后,在此基础上,提出相应的改进措施并经过了RTDS仿真验证。所提方案已成功应用于昆柳龙直流工程,为工程调试和后续安全稳定运行提供了保证,对以后特高压柔性直流工程具有重要的参考价值。Kunliulong UHVDC is the world’s first hybrid multi-terminal UHVDC project in which the VSC station adopts the series structure of high and low converter.Before starting,it needs to charge the high and low converter in turn.As for the tripping event of Liuzhou converter station during charging process of high and low values/value group,this article first points out that the later charging converter jassively charged by DC side is a special phenomenon of VSC-UHVDC.Combined the mechanism analysis of this special phenomenon and the charging logic of valve control system,the reason of tripping event is found.Finally,based on the above analysis,the corresponding improvement measure is put forward and verified through RTDS simulation.The proposed scheme has been successfully applied to Kunliulong HVDC project.It has provided a guarantee for projects debugging and subsequent safe and stable operation,which also has an important reference value for future VSC-UHVDC projects.

关 键 词：特高压混合多端 特高压柔性直流 高低阀组 不控充电 被动充电 

分 类 号：TM721[电气工程—电力系统及自动化]