Simulation of Electric Faults in Doubly-Fed Induction Generators Employing Advanced Mathematical Modelling

Authors

  • Sebastian Martens Centre of Electric Power and Energy Department of Electrical Engineering Technical University of Denmark
  • Nenad Mijatovic Centre of Electric Power and Energy Department of Electrical Engineering Technical University of Denmark
  • Joachim Holbøll Centre of Electric Power and Energy Department of Electrical Engineering Technical University of Denmark
  • Georgis A. Skrimpas Remote Monitoring Group Brüel & Kjær Vibro A/S
  • Christian W. Sweeney Remote Monitoring Group Brüel & Kjær Vibro A/S

DOI:

https://doi.org/10.5324/nordis.v0i24.2292

Keywords:

Wind turbine generator, , doubly-fed induction generators, mathematical modelling, fault investigations

Abstract

Efficient fault detection in generators often require prior knowledge of fault behavior, which can be obtained from theoretical analysis, often carried out by using discrete models of a given generator. Mathematical models are commonly represented in the DQ0 reference frame, which is convenient in many areas of electrical machine analysis. However, for fault investigations, the phase-coordinate representation has been found more suitable. This paper presents a mathematical model in phase coordinates of the DFIG with two parallel windings per rotor phase. The model has been implemented in Matlab and its properties in context of fault simulations and investigations has been investigated. Some of the most common faults have been simulated, namely broken rotor bars or windings, dynamic eccentricities and stator phase winding short circuits. These fault conditions propagate to the stator current as undesired spectral components, which can be detected by applying frequency spectrum analysis.

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Published

2017-09-04

Issue

No. 24 (2015): Proceedings of the 24th Nordic Insulation Symposium

Section

Articles

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