电网技术2024，Vol.48Issue(4)：1799-1807,后插1,10.DOI:10.13335/j.1000-3673.pst.2023.0845
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
摘要
Abstract
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Key words
UHVDC(ultra high voltage direct current)/CMT-UHVDC(cascade multi-terminal UHVDC)/cascade HVDC at sending terminal/control and protection system/function configuration分类
信息技术与安全科学引用本文复制引用
张庆武,徐莹,沈天骄,高子健,肖建民,唐俊..级联多端特高压直流控制保护系统配置及策略[J].电网技术,2024,48(4):1799-1807,后插1,10.基金项目
国家电网有限公司总部管理科技项目(5200-202256077A-1-1-ZN).Project Supported by Science and Technology Project of SGCC(5200-202256077A-1-1-ZN). （5200-202256077A-1-1-ZN）
