Details

Autor(en) / Beteiligte

• Rostami, Ali
• Rezaei, Navid

Titel

A novel protection scheme for doubly fed induction generator‐based wind turbines during the fault occurrence in the rotor‐circuit

Ist Teil von

• IET generation, transmission & distribution, 2023-09, Vol.17 (17), p.3968-3983

Ort / Verlag

Wiley

Erscheinungsjahr

2023

Link zum Volltext

Quelle

Wiley Online Library Journals Frontfile Complete

Beschreibungen/Notizen

• The rotor‐circuit (RC) of the doubly fed induction generator‐based wind turbine (DFIG‐WT) consists of various equipment in which faulty conditions must be immediately identified, because this faulty status leads to the loss‐of‐excitation (LOE) phenomenon and may cause some serious damages. In this regard, this paper develops a novel solution to protect the DFIG‐WT during such a condition. For this purpose, a comprehensive investigation on behavior of the DFIG‐WT during the conditions of the RC failures has been carried out. The results show that, the output active power of the machine (Pdfig) can be considered as a suitable initial indicator for detecting the RC failures. However, to reliable detection of the partial‐LOE (PLOE), complete‐LOE (CLOE) and discrimination from the other power system disturbance (PSD), a directional over‐current (DOC) and an under voltage (UV) relays are suggested to be installed in the RC, at both ends of the back‐to‐back converters. Consequently, by detecting the Pdfig decrement, the provided DOC and UV relays in the RC will be triggered to classify the occurred events. The outlined protection scheme is exhaustively investigated on a typical power system which the obtained simulation results show the high reliability in discriminating the RC failures and PSD events with an acceptable detection time. This paper introduced a novel protection method for PLOE/CLOE detection in RC of the DFIG‐WT and discriminating from other events. The developed strategy utilizes the Pdfig as a first indicator for RC failures, and DOC and UV relays in the RC as the main protection functions to identify the PLOE and CLOE, respectively. According to the obtained results from deep investigation on a typical power system, the major benefits of the suggested approach of this paper can be clustered as follows. Reliable discrimination of the PLOE/CLOE from other PSD events. Simple execution of the suggested strategy in real‐world for the DFIG‐WT. Fast detection of the both CLOE and PLOE events. Independent from the operating conditions of the machine.