Abstract
The fault current characteristics of Doubly Fed Induction Generator (DFIG) based wind turbine generator (WTGs) differ from those of traditional generators. Although asymmetrical faults are far more frequent, the studies on transient current characteristics of DFIG-based WTGs are mainly focused on symmetrical faults and consider the variations in voltage magnitude only. This paper presents highly accurate and concise analytical expressions for the stator and rotor currents of DFIG-based WTGs under crowbar protection considering the variations in magnitude and phase angle of both the positive- and negative-sequence voltages during asymmetrical faults. The proposed expressions are validated using a detailed simulation model of a 1.5 MW DFIG-based WTG. The expressions can be directly integrated into protection tools for the evaluation of dynamic performance of relays and design of fault ride through (FRT) solutions.
| Original language | English |
|---|---|
| Article number | 108553 |
| Journal | Electric Power Systems Research |
| Volume | 211 |
| DOIs | |
| Publication status | Published - Oct 2022 |
Keywords
- Crowbar
- Doubly fed induction generator (DFIG)
- Short circuit current
- Unbalanced voltage
- Unsymmetrical fault
ASJC Scopus subject areas
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering