Analysis of Sub-Synchronous Resonance in DFIG based Wind Farm

Authors

  • D. Maharajan , K. Mohanraj , R. Vignesh , A. T. Muralikrishna , M. Athreya , V.P. Boopathi

Abstract

To enhance the real power transfer of the system, a series compensated capacitor is used widely in a grid utility.
Although the real power evacuation is enhanced, there is a possibility for Sub-Synchronous Resonance (SSR) created
by a series compensated capacitor in the grid to the wind farm. The SSR causes electro-mechanical stress in the
wind turbine shaft, which ultimately leads to a point of weakness or fracture. In this paper, a two rotating mass
connected by a shaft which analogous to Doubly-Fed Induction Generator (DFIG) based Wind Turbine Generator
(WTG). The DFIG based WTG has subjected to sub-synchronous oscillation (SSO) by adding various levels of series
compensation and its mechanical vibration due to resonance is studied using simulation. A 3 MW WTG shaft is
designed using ANSYS. For a given specification, SSO in a grid connected wind farm is investigated by using
MATLAB/Simulink. The IEEE's first benchmark model is exploited for sub-synchronous resonance studies. The PVSTATCOM model is used for mitigating the SSR for the investigated cases of the study system.

Published

2020-03-31

Issue

Section

Articles