可控关断逆阻型IGCT换流阀研制  

Development of RB-IGCT Forced Commutation Valve

作　　者：刘磊[1] 卢宇[1] 黄宇[2] 谢晔源[1] LIU Lei;LU Yu;HUANG Yu;XIE Ye-yuan(NR Electric Co.,Ltd.,Nanjing 211102,China;State Grid Sichuan Electrical Power UHVDC Center,Chengdu 610072,China)

机构地区：[1]南京南瑞继保电气有限公司,江苏南京211102 [2]国网四川省电力公司特高压直流中心,四川成都610072

出　　处：《电力电子技术》2025年第2期27-30,39,共5页Power Electronics

基　　金：国家电网公司科技项目(5108-202218280A-2-115-XG)。

摘　　要：基于大功率晶闸管构成的电流源型换流器在HVDC工程中得到广泛应用,由于晶闸管的固有关断特性,当交流系统电压跌落时会引发换相失败问题,这将导致直流功率波动、甚至直流闭锁,威胁电网安全稳定运行。为了解决换相失败问题,首先基于逆阻型集成门极换流晶闸管(RB-IGCT)构建了新型换流器,提出了这种换流器的两种运行模式,设计了可控关断RB-IGCT换流器控制系统,并基于所设计的控制系统提出了换流器换相工作时序。其次采用6英寸RB-IGCT设计了换流阀,并提出了IGCT驱动单元的设计方案。最后搭建了换流阀运行试验系统,完成了RB-IGCT换流阀样机研制和验证,通过试验验证了换流阀设计的合理性。所提成果可为后续RB-IGCT在HVDC工程中的应用提供有力支撑。The line-commutated converters based on high-power thyristors have been widely used in HVDC transmis-sion projects.However,due to the inherent commutation failure caused by the turn-off characteristics of thyristors,volt-age sag in the AC system can lead to commutation failure,resulting in DC power fluctuations,even DC blocking,and posing a threat to the security and stability of the power grid.To address the commutation failure issue in HVDC transmission,firstly,a novel converter based on the reverse-blocking integrated gate commutated thyristors(RB-IGCT)is constructed,two operational modes for this converter is proposed.A controllable turn-off RB-IGCT converter control system is designed,and a commutation sequence for the converter during commutation is presented based on the de-signed control system.Subsequently,a converter valve is designed using a 6-inch RB-IGCT,and a design scheme for the IGCT driving unit is proposed.Finally,a converter valve operation test system is established,and a prototype of the RB-IGCT converter valve is developed and verified through experiments,confirming the rationality of the convert-er valve design.The proposed results can provide strong support for the subsequent application of RB-IGCT in HVDC transmission projects.

关 键 词：换流器 可控关断 逆阻型集成门极换流晶闸管 

分 类 号：TM46[电气工程—电器]