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特高压多端混合直流输电系统阀组计划投/退控制方法
刘静佳, 梅红明, 刘树, 于华龙, 王皆庆
北京四方继保自动化股份有限公司,北京 100085
摘要:
现有的阀组投入/退出控制策略只适用于特高压两端常规直流输电系统,不能适用于特高压柔性直流输电系统,更不能适用于特高压多端混合直流输电系统。为此,以乌东德电站送电广东广西工程为背景,提出基于混合桥模块化多电平换流器的阀组计划投入/退出控制方法,并对现有常规直流阀组计划投/退控制方法进行改进。在RTDS仿真试验平台上进行硬件闭环测试,结果表明所提阀组计划投入/退出控制方法能够平稳、快速地完成特高压多端混合直流输电系统阀组的计划投/退。
关键词:  特高压直流  多端混合直流输电系统  柔性直流零压解锁  阀组计划投/退  改进的阀组投/退控制
DOI:10.16081/j.epae.201909032
分类号:TM721
基金项目:国家重点研发计划项目(±800 kV/5 000 MW特高压柔性直流换流阀关键装备研发)(2016YFB0901003)
Planned valve group entry/exit control method for UHV multi-terminal hybrid HVDC system
LIU Jingjia, MEI Hongming, LIU Shu, YU Hualong, WANG Jieqing
Beijing Sifang Automation Co.,Ltd.,Beijing 100085, China
Abstract:
The existing valve group entry/exit control strategies are only suitable for two-terminal LCC-UHVDC(Line Commutated Converter Ultra-High Voltage DC) transmission system, but cannot be used in VSC-UHVDC(Voltage Source Converter Ultra-High Voltage DC) transmission system and multi-terminal hybrid UHVDC transmission system, for which, based on the background of the project transmitting power from Wudongde power station to Guangdong and Guangxi, a planned valve group entry/exit control method based on hybrid bridge MMC(Modular Multilevel Converter) is proposed, and the existing planned valve group entry/exit control method for LCC-HVDC is improved. The hardware closed-loop test is performed in RTDS simulation test platform, and results show that the proposed method can smoothly and quickly complete the planned valve group entry/exit in multi-terminal hybrid UHVDC transmission system.
Key words:  UHVDC  multi-terminal hybrid HVDC system  zero voltage deblock of MMC  planned valve group entry/exit  improved valve group entry/exit control

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