摘要
以乌东德电站送电广东广西特高压多端直流示范工程为背景,针对混合多端直流运行方式复杂、可靠性要求高的特点,研究了特高压混合多端直流输电系统的控制策略,提出了适用于特高压混合多端直流输电系统的控制模式以及启动/停运方案,实现了混合直流的外特性匹配、两端/三端启动/停运,以及第三端在线投入/退出;同时,提出了各端稳态控制策略和多端协调控制策略,可适应混合多端直流输电系统复杂的运行方式。最后,基于PSCAD/EMTDC的数字仿真结果验证了所述控制策略的有效性,可以保证特高压混合多端直流输电系统可靠稳定运行。
Based on Wudongde multi-terminal UHVDC demonstration project,the control strategy of multi-terminal hybrid UHVDC transmission system is researched to adapt to the characteristics of complex operation and high reliability requirements. The control mode and starting-up/shutting-dow n approach applied to multi-terminal hybrid UHVDC system are proposed,which could realize the matching of external characteristics of hybrid DC,two/three terminal stations starting-up/shutting-dow n,and the third terminal station online inputting/quitting. Also,the steady state control strategy of each terminal and multi-terminal coordinated control strategy are also studied,which could adapt to the complex operation of multi-terminal hybrid HVDC transmission system. Finally,the simulation results based on PSCAD/EMTDC show the validity of proposed control strategy,verifying the reliable and stable operation of multiterminal hybrid UHVDC transmission system.
作者
李婧靓
黄伟煌
刘涛
李明
李岩
LI Jingjing, HUANG Weihuang, LIU Tao, LIMing, LI Yan(State Key Laboratory of HVDC, Electric Power Research Institute, CSG, Guangzhou 510663, Chin)
出处
《南方电网技术》
北大核心
2018年第2期47-55,共9页
Southern Power System Technology
关键词
特高压多端混合直流输电
控制模式
启动停运方案
多端协调控制策略
multi-terminal hybrid UHVDC transmission
control mode
start-up/shut-down approach
multi-terminal coordinated control strategy
