级联多端特高压直流控制保护系统配置及策略  

Configuration and Strategies of the Control and Protection System for CMT-UHVDC

作　　者：张庆武[1,2] 徐莹 沈天骄 高子健 肖建民 唐俊[1] ZHANG Qingwu;XU Ying;SHEN Tianjiao;GAO Zijian;XIAO Jianmin;TANG Jun(NR Electric Co.,Ltd.,Nanjing 211102,Jiangsu Province,China;State Grid Electric Power Research Institute Co.,Ltd.,Nanjing 211000,Jiangsu Province,China;State Grid Economic and Technological Research Institute Co.,Ltd.,Changping District,Beijing 102209,China)

机构地区：[1]南京南瑞继保电气有限公司,江苏省南京市211102 [2]国网电力科学研究院有限公司,江苏省南京市211000 [3]国网经济技术研究院有限公司,北京市昌平区102209

出　　处：《电网技术》2024年第4期1799-1807,I0104,共10页Power System Technology

基　　金：国家电网有限公司总部管理科技项目(5200-202256077A-1-1-ZN)。

摘　　要：该文针对金上直流工程主回路拓扑结构与运行方式的特点,设计了送端分址级联多端特高压直流控制保护系统的配置方案;提出送端分站的高、低压换流器的电压平衡控制方案,根据送端两站间通信条件,切换采用附加电压平衡控制的触发角协调控制和串联两换流器一个定电压、另一个定电流的控制策略;基于送端分站级联拓扑,研究了其直流保护功能配置方案,并提出针对送端站1内的极区/换流器区故障或者送端两站之间直流线路永久故障的快速清除方法。基于控制保护工程样机的RTDS闭环仿真结果表明,该级联多端特高压直流控制保护系统可以满足实际工程应用的要求。This paper designs the configuration scheme of the control and protection system in different converter stations at the sending-terminal for the cascade multi-terminal ultra high voltage direct current(CMT-UHVDC),according to the characteristics of the topology and operation mode of Jinsha river upstream CMT-UHVDC project.The DC voltage balance control method for the high-voltage converter and the low-voltage converter in different stations at the sending-terminal is proposed.The method include two control strategies:one is the fire-angle coordination with additional voltage balance control strategy,the other is one converter runs in constant voltage control mode and the other converter runs in constant current control mode.According to the communication states between the stations at sending terminal,one of the two control strategies will be selected as active.The protection function configuration scheme for the sending-terminal of CMT-UHVDC is studied,and a clearing method for the fault which occurs in pole/converter zone in Station 1 or the DC line between Stations at sending terminal is proposed.The RTDS closed-loop simulation results show the control and protection prototype for CMT-UHVDC can adapt the requirements of practical project.

关 键 词：特高压直流输电 级联多端特高压直流 送端级联直流 控制保护系统 功能配置 

分 类 号：TM721[电气工程—电力系统及自动化]