摘要
分析了基于模块化多电平换流器(MMC)交直流混合配电网与双馈风机(DFIG)的协调控制策略,研究了MMC换流站和DFIG对交流系统产生的暂态故障响应。基于协调控制提出一种改进的自适应撬棒(Crowbar)电路,提高了DFIG的低电压过渡能力。并利用RTDS软件平台,仿真验证了在交流系统发生三相短路和不对称故障时,含DFIG交直流混合配电网在故障回路中产生的故障特征。
The coordinated control strategy based on modular multilevel converter(MMC)and Doubly⁃Fed Induction Generator(DFIG)of AC-DC hybrid distribution network is analyzed,and the transient fault response of MMC converter station and DFIG to the AC system is researched.Then based on the coordinated control,this paper proposes an improved adaptive Crowbar circuit to improve the low⁃voltage ride⁃through(LVRT)capability of DFIG.In addition,this paper simulates and verifies the fault characteristics of AC-DC hybrid distribution network containing DFIG in the fault circuit when three-phase short circuit and asymmetric fault occur in the AC system on the RTDS software platform.
作者
赵晓敏
赵影
李斯特
郭金刚
王达
ZHAO Xiaomin;ZHAO Ying;LI Site;GUO Jingang;WANG Da(Eastern Inner Mongolia Electric Science Research Institute,Hohhot 010010,China)
出处
《内蒙古电力技术》
2021年第5期15-21,共7页
Inner Mongolia Electric Power
基金
国网内蒙古东部电力有限公司科技项目“综合能源应用及储能控制系统研究与应用”(526604190002)。
关键词
模块化多电平换流器
交直流混合配电网
分布式能源
低电压过渡
双馈风力发电
协调控制
modular multilevel converter
AC-DC hybrid distribution network
distributed energy resource
low voltage ride through
DFIG
coordinated control
