摘要
混合串联补偿对输电线路暂态特性的影响亟待研究。为研究串联补偿混合复用对瞬态恢复电压(transient recovery voltage,TRV)暂态特性的影响,以500 kV超高压示范工程线路为研究背景,利用PSCAD/EMTDC建立可控串补与固定串补的电磁暂态仿真平台,分析系统发生单相接地故障时瞬态恢复电压变化规律,得到恢复电压上升率与短路电流变化曲线;采用对比分析方法,针对可控串补与固定串补不同配置方式,研究不同串补度对TRV特性的影响,并得出最佳串补配比。仿真表明:相比固定串联补偿(fixed series capacitor compensation,FSC)双平台分段布置,系统采用可控串联补偿(thyristor controlled series compensation,TCSC)与FSC混合复用时,TRV超标工况大幅增加;合理配置TCSC+FSC线路串补度,能够有效降低TRV与断路器短路电流,且能够满足断路器正常开断的国家标准。
The influence of hybrid series compensation on transient characteristics of transmission lines needs to be studied.In order to study the influence of series compensation hybrid multiplexing on the transient characteristics of TRV(transient recovery voltage),the 500 kV ultra-high voltage demonstration project line was taken as the research background.The electromagnetic transient simulation platform of controllable series compensation and fixed series compensation was established by PSCAD/EMTDC.The transient recovery voltage variation law was analyzed when single-phase ground fault occurs in the system,and the recovery voltage rise rate and short-circuit current change curve were obtained.The comparative analysis method was adopted.For different configurations of controllable series compensation and fixed series compensation,the influence of different series compensation degrees on TRV characteristics was studied,and the optimal series compensation ratio was obtained.The simulation results show that compared with the FSC(fixed series capacitor compensation)dual-platform segmented layout,the TRV exceeding condition is greatly increased when the system adopts TCSC(thyristor controlled series compensation)and FSC hybrid multiplexing.Reasonable configuration of TCSC+FSC line series compensation,TRV and circuit breaker short-circuit current can be effectively reduced,and the national standard for normal breaking of circuit breakers can be met.
作者
何柏娜
孟凡涛
董彦辰
林莘
刘洋
吴硕
代维汉
尉元龙
王硕
张东进
HE Bai-na;MENG Fan-tao;DONG Yan-chen;LIN Xin;LIU Yang;WU Shuo;DAI Wei-han;WEI Yuan-long;WANG Shuo;ZHANG Dong-jin(College of Electric and Electronic Engineering,Shandong University of Technology,Zibo 255049,China;State Grid Shandong Zibo Power Supply Company,Zibo 255049,China;Key Laboratory of Special Machine and High Voltage Apparatus,Ministry of Education,Shenyang University of Technology,Shenyang 110870,China)
出处
《科学技术与工程》
北大核心
2023年第27期11681-11687,共7页
Science Technology and Engineering
基金
山东省自然科学基金(ZR2021ME057)
特种电机与高压电器教育部重点实验室开放课题(KFKT202111)。
关键词
可控串补
固定串补
瞬态恢复电压
恢复电压上升率
短路电流
controllable series compensation
fixed series compensation
transient recovery voltage
recovery voltage rise rate
short circuit current
