An Electromagnetic Transient Analysis Model for DFIG Considering LVRT Hardware Protection

IEEE Access

Tongchui Liu¹  Zhu Zhu¹  Wenxia Pan¹  Yibo Zhang²  Mingyang Liu³  Chenghao Li³  Yufei Rao³ 

[1] College of Energy and Electrical Engineering, Hohai University, Nanjing, China;State Grid Henan Electric Power Corporation Maintenance Company, Zhengzhou, China;State Grid Henan Electric Power Research Institute, Zhengzhou, China;

关键词: DFIG-based wind turbine;    equivalent model;    crowbar protection;    chopper protection;   

DOI  :  10.1109/ACCESS.2021.3060409

来源: DOAJ

【 摘 要 】

Crowbar protection and chopper protection (CCP) are commonly used hardware protection measures in the process of low voltage ride through (LVRT) of doubly-fed induction generator (DFIG). The protections operating states during fault have an important influence on the electromagnetic transient (EMT) process of DFIG. Therefore, different from only considering the influence of single protection, the coordinated control of crowbar protection and chopper protection are further considered in this paper, and a novel analysis method of CCP operation criterion is proposed by analyzing the relationship between rotor current, DC-link voltage and post-fault terminal voltage (PFTV) of DFIG. On this basis, the states of CCP under different voltage drop depths are analyzed. And an EMT analysis model of DFIG considering CCP is studied. The proposed method and EMT analysis model for DFIG are later validated through PSCAD/EMTDC-based simulation results. The results show that the method and model proposed in this paper have good accuracy and practicability, which provides more references for further study of the transient characteristics of DFIG.

【 授权许可】

Unknown