可控电流源型换流器IGCT串联均压技术  

IGCT Series Voltage Sharing Technology of Controllable Current Source Converter

作　　者：陈龙龙 汤广福 魏晓光 王以璇 崔翔 高冲 张闻闻 CHEN Longlong;TANG Guangfu;WEI Xiaoguang;WANG Yixuan;CUI Xiang;GAO Chong;ZHANG Wenwen(State Key Laboratory of Advanced Transmission Technology(State Grid Smart Grid Research Institute Co.,Ltd.),Changping District,Beijing 102209,China;Huairou Laboratory,Huairou District,Beijing 101400,China;State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources(North China Electric Power University),Changping District,Beijing 102206,China)

机构地区：[1]先进输电技术国家重点实验室(国网智能电网研究院有限公司),北京市昌平区102209 [2]怀柔实验室,北京市怀柔区101400 [3]新能源电力系统国家重点实验室(华北电力大学),北京市昌平区102206

出　　处：《中国电机工程学报》2024年第12期4859-4868,I0021,共11页Proceedings of the CSEE

基　　金：国家电网公司科技项目(基于可控关断的电流源型换流器关键技术研究与样机研究)(5500202058059A0000)。

摘　　要：高压大功率逆阻型集成门极换流晶闸管(integrated gate commutation thyristor,IGCT)串联是可控电流源型换流器的关键技术之一,主要面临开通和关断不一致将会引起击穿的问题,目前尚缺乏深入研究和实验测试。该文首先分析可控电流源型换流器均压问题产生的原因,提出串联器件均压电路。接着,对开通不一致影响因素进行分析,给出IGCT使用电压和保护电压的配合关系,以确保开通过程器件安全。然后,对IGCT的自然和主动关断2种特殊关断过程影响因素进行分析,给出缓冲电路参数选择方法。最后,研制8级串联的IGCT模块样机,搭建实验平台进行测试。结果表明,所提方法能够有效抑制IGCT关断电压过冲,均压不一致性控制在8%以内。The control of voltage sharing is one of the core technologies of the current source converter based on series connected integrated gate commutation thyristor(IGCT).At present,there is a lack of research and testing on series-connected IGCTs,specifically addressing the inconsistencies in turn-on and turn-off characteristics caused by variations in IGCTs,trigger delay and snubber parameters.First of all,the mechanism caused voltage unbalance is carried out and a sub-module circuit for voltage sharing is proposed in this paper.Then,the inconsistency factors leading to IGCTs’turn-on inconsistency is analyzed,and the coordination between the IGCT utilization and protection voltage ratio is suggested.After that,this paper analyzes the natural and active turn-off characteristics and recommends snubber parameters.Finally,a test platform and an 8-level series IGCT module prototype are developed to verify the performance.Significantly,the test results indicate that the inconsistency of the voltage among IGCTs is controlled within 8%.

关 键 词：电流源型换流器 均压特性 静态均压 开通一致性 关断一致性 

分 类 号：TM46[电气工程—电器]