混合换相换流系统换相失败抵御方法与RTDS验证  

Commutation failure resistance strategy and RTDS verification of hybrid commutation converter

作　　者：王松 屈鲁 訾振宁 崔康生 施健 崔健 刘凯[3] 付红军 杜兴伟 姚孟 韩伟 刘超 肖超 WANG Song;QU Lu;ZI Zhenning;CUI Kangsheng;SHI Jian;CUI Jian;LIU Kai;FU Hongjun;DU Xingwei;YAO Meng;HAN Wei;LIU Chao;XIAO Chao(Department of Electrical Engineering,Tsinghua University,Beijing 100084,China;Sichuan Energy Internet Research Institute,Tsinghua University,Chengdu 610000,China;NR Electric Co.,Ltd.,Nanjing 211102,China;State Grid Henan Electric Power Company,Zhengzhou 450000,China)

机构地区：[1]清华大学电机工程与应用电子技术系,北京100084 [2]清华四川能源互联网研究院,四川成都610000 [3]南京南瑞继保电气有限公司,江苏南京211102 [4]国网河南省电力公司,河南郑州450000

出　　处：《电工电能新技术》2024年第7期51-59,共9页Advanced Technology of Electrical Engineering and Energy

摘　　要：换相失败是基于电网换相换流技术(LCC)的直流输电特有的故障形式,并且在弱交流系统中表现尤为明显。本文首先分析了LCC换相失败的原因,提出了采用大功率可控关断的集成门极换流晶闸管(IGCT)替代晶闸管的混合换相换流技术(HCC)方案。接着结合IGCT特点,提出了适用于HCC的正常换流与换相失败抵御两种工况下的主动关断模式及其实现方法。然后参照实际高压直流控制保护框架,设计并搭建了实时数字仿真平台(RTDS)环境下的HCC系统的一次回路、直流控保以及阀控系统,在尽量沿用现有的已经成熟的控保技术的同时,仅增加了主动关断部分。最后通过系列试验验证了HCC系统抵御换相失败的可行性与准确性。Commutation failure is a unique fault of LCC⁃HVDC,which is particularly conspicuous in weak AC sys⁃tems.This paper firstly analyzes the reasons for LCC commutation failure,and then proposes a hybrid commutation converter technology scheme that applies high⁃power controllable shutdown IGCTs for thyristor replacement.And combined with characteristics of IGCT,active shutdown strategies and implementation methods for HCC are pro⁃posed,under the conditions of normal commutation and commutation failure resistance.Subsequently,according to the actual HVDC control and protection framework,the primary circuit,CCP and PPR systems of HCC system in the RTDS environment were designed and established,for what only the active shutdown part was added compared to LCC.Finally,a series of experiments were conducted to verify the feasibility and accuracy of the HCC system for resisting commutation failure.

关 键 词：混合换相换流技术 换相失败抵御 集成门极换向晶闸管 主动关断 换相增强 实时数字仿真 

分 类 号：TM712[电气工程—电力系统及自动化]