抑制多馈入系统后续换相失败的协调控制策略  

Coordinated Control Strategy for Suppressing Subsequent Commutation Failure in Multi-infeed System

作　　者：高毅 赵逸帆 赵学伟 秦海杰 GAO Yi;ZHAO Yifan;ZHAO Xuewei;QIN Haijie(Urban Power Supply Company,State Grid Shanghai Municipal Electric Power Company,Shanghai 200080,China)

机构地区：[1]国网上海市电力公司市区供电公司,上海200080

出　　处：《电力系统及其自动化学报》2025年第4期139-149,共11页Proceedings of the CSU-EPSA

基　　金：国网上海市电力公司科技项目(B30911230005)。

摘　　要：为解决多馈入直流输电系统因故障恢复阶段各直流恢复次序不当而导致的后续换相失败问题,提出一种能动态适应系统运行方式变化的协调控制策略。首先,基于多馈入系统的整体恢复原则,提出多馈入动态恢复灵敏因子(multi-infeed dynamic recovery sensitivity factor,MIDRSF)以量化各直流子系统的恢复强度;其次,将多馈入模型等值为单馈入模型,并提出能充分调用系统无功储备的多馈入系统自适应直流电流控制策略;最后,以多馈入动态恢复灵敏因子量化修正各直流电流的恢复速率,从而实现各直流的有序恢复。在PSCAD/EMTDC中搭建双馈入模型进行仿真分析,结果验证所提出的协调控制策略可以有效改善系统的恢复性能,抑制后续换相失败的发生。To solve the problem of subsequent commutation failure in a multi-infeed LCC-HVDC transmission system caused by improper DC recovery sequence at the fault recovery stage,a coordinated control strategy which can dynam-ically adapt to the changes in system operation mode is proposed.First,based on the global recovery principle for the multi-infeed system,a multi-infeed dynamic recovery sensitivity factor(MIDRSF)is proposed to quantify the recovery strength of each DC subsystem.Second,the multi-infeed model is equivalent to a single-infeed model,and an adaptive DC current control strategy for the multi-infeed system is put forward,which can fully utilize the reactive power reserve of the system.Finally,the recovery rate of each DC current is quantitatively corrected by MIDRSF,so as to realize the ordered recovery of each DC current.A dual-infeed model is built in PSCAD/EMTDC for simulation analysis,and re-sults verify that the proposed coordinated control strategy can effectively improve the recovery performance of the system and suppress the subsequent commutation failure.

关 键 词：多馈入直流输电系统 电压稳定 后续换相失败 动态恢复灵敏因子 协调控制策略 

分 类 号：TM712[电气工程—电力系统及自动化]