【作者】 刘健； 尹项根； 张哲； 唐萍； 熊卿； 王存平；

【Author】 LIU Jian,YIN Xiang-gen,ZHANG Zhe,TANG Ping,XIONG Qing,WANG Cun-ping (State Key Laboratory of Advanced Electromagnetic Engineering and Technology(Huazhong Univ.of Sci.& Tec.) Wuhan 430074,Hubei Privince,China)

【机构】 强电磁工程与新技术国家重点实验室(华中科技大学)；

【摘要】 高压大功率三电平逆变系统故障形式多样且特殊,传统主设备保护已不能完全满足要求。本文针对三电平逆变系统的结构特点,将其划分为交流输入、直流、交流输出三个环节,对各环节对可能出现的故障及其特性进行了分析,并指出现有保护配置与原理的不足,同时对新的保护原理与实现方法进行了研究。论文还建立了系统的故障仿真模型,并以此为基础进行了仿真分析。论文所提出的保护配置在6kV/1MW三电平逆变系统中得到了应用,静态模拟以及试验研究均验证了所提出的保护原理与算法的正确性。更多还原

【Abstract】 Fault types in high voltage and high power three-level NPC inverter system are diverse,and each of them has its characteristics.Traditional main equipment protection technology can not satisfy the requirement completely.This paper divided the inverter system into three parts according to its structure characteristic.They were AC input,DC-Link and AC output.Then the possible faults and its features were analyzed in each part.The shortcoming of the current protection configuration and principle were pointed out,and the new protection principle and realization method were studied.The fault simulation model of the system was built and the simulation analysis was conducted on this basis.At last,the proposed protection configuration and principle has been put into practice in the 6kV/1MW three-level inverter system,and the static simulation and experimental results were given to verify the correctness of the protection principle and algorithm.更多还原