Fault Ride through Strategy for Virtual Synchronous Control based Doubly-Fed Induction Generators

2018 2nd International Conference on Power and Energy Engineering

Cheng, Xuekun^1,2 ; Liu, Hui^1,2 ; Song, Peng^1,2 ; Jiang, Hao^1,2

State Grid Jibei Electric Power Co. Ltd. Research Institute, Beijing, China^1

Grid-connected Oper. Technol. for Wind-Solar-Storage Hybrid Syst. State Grid Corp. Key Laboratory, Beijing, China^2

关键词: Doubly fed induction generator (DFIG);    Doubly Fed Induction generators (DFIG);    Electro-magnetic transient;    Electromagnetic torques;    Engineering applications;    Fault characteristics;    Synchronous control;    Voltage compensation;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/192/1/012021/pdf
DOI  :  10.1088/1755-1315/192/1/012021

来源: IOP

【 摘 要 】

Virtual Synchronous Control (VSynC) strategy for Doubly-Fed Induction Generator (DFIG) has attracted much attention because of its advantages in providing dynamic supports of frequency and voltage. In this way, most researches of VSynC strategy concentrate on analysis of its electromechanical behaviours, but pay little attention to its electromagnetic transient responses and fault characteristics, which may hinder its promotion in engineering application. This paper pays special attention to the electromagnetic transient behaviours of VSynC-based DFIG and proposes a voltage compensation VSynC strategy to implement fault ride through during symmetrical grid faults. The proposed strategy improves the transient response of existing VSynC strategy, capable of limiting the overcurrent in DFIG rotor circuits and suppressing the oscillations of electromagnetic torque. Simulation results validate the effectiveness of the proposed strategy.