晶闸管阀换相失败判据的理论分析  

Theoretical Analysis on the Commutation Failure Criterion of Thyristor

作　　者：郭龙 黄莹 李岩 赵晓斌 辛清明 卢毓欣 张祖安 李凌飞 侯婷 李春华 姬煜轲 GUO Long;HUANG Ying;LI Yan;ZHAO Xiaobin;XIN Qingming;LU Yuxin;ZHANG Zu＇an;LI Lingfei;HOU Ting;LI Chunhua;JI Yuke(State Key Laboratory of HVDC,Electric Power Research Institute,CSG,Guangzhou 510663,China)

机构地区：[1]直流输电国家重点实验室(南方电网科学研究院),广州510663

出　　处：《南方电网技术》2018年第5期1-9,共9页Southern Power System Technology

摘　　要：综合分析了常规直流晶闸管阀换相的全过程,包括晶闸管正向导通电流过零的换相重叠过程和阻断能力恢复过程;从换相电抗能量耗散的角度重新解释了晶闸管换相重叠过程,并从电荷角度分析了晶闸管阻断能力恢复过程,在此基础上,研究了晶闸管阀反向恢复电荷、载流子寿命和反向关断时间等参数对换相过程的影响,并对"γ<7°"这一换相失败判据的理论依据进行了分析和推导。The whole process of conventional DC thyristor valve commutation is analyzed comprehensively,including the commutation overlapping process during the forward conduction current being zero,and the recovery process of the reverse blocking ability. Especially,the thyristor＇s commutation overlapping process is reinterpreted in terms of commutation reactance energy dissipation,and the thyristor＇s recovery process of the reverse blocking ability is analyzed in terms of power charge. On the basis of these,the influence of the reverse recovery power charge,carrier lifetime and reverse turn-off time of the thyristor valve on the commutation process are studied. Finally,the theoretical basis of commutation failure criterion ＇γ 7°＇ is analyzed and deduced.

关 键 词：晶闸管 阻断能力恢复过程 换相电抗 换相失败判据 

分 类 号：TM46[电气工程—电器]