Design of linear quadratic regulator for SCIG based wind farm to damp SSR oscillations

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Abstract:

As the penetration of wind energy to the grid is increasing drastically, the transmission line must be capable of handling large power which demands the series capacitor compensation for the lines. This can result in Sub-synchronous oscillations in the system. This paper explains the detailed mathematical modeling of a Squirrel Cage Induction Generator (SCIG) based wind farm, which is interconnected to the grid through a series, compensated transmission line. The detailed Sub-synchronous Resonance (SSR) analysis has been conducted under various operating conditions such as varying wind penetration levels, varying series compensation levels and varying grid impedance levels. Damping of different modes of SSR oscillations are analysed using the eigen value method. A Linear Quadratic Regulator has been designed for damping of these oscillations. The performance of the system with the proposed controller is analyzed for different operating conditions and the performance was satisfactory. © 2017 IEEE.

Notes:

cited By 0; Conference of 2017 IEEE International Symposium on Technologies for Smart Cities, TENSYMP 2017 ; Conference Date: 14 July 2017 Through 16 July 2017; Conference Code:131361