A Study on the Impact of Wind Generation on the Stability of Electromechanical Oscillations

TL;DR

This paper analyzes how DFIG-based wind farms affect power system stability, using modal analysis and control strategies to improve damping of electromechanical oscillations under various wind penetration levels.

Contribution

It introduces a comprehensive modal analysis approach to evaluate wind farm impacts and designs voltage and damping controllers to enhance system stability.

Findings

Damping improves up to 933% with control activation at 25% wind integration.

Eigenvalue analysis effectively assesses stability under different wind penetration levels.

Control strategies significantly enhance oscillation damping in wind-penetrated power systems.

Abstract

Wind is becoming an increasingly significant source of energy in modern power generation. Amongst existing technologies, Variable Speed Wind Turbines (VSWT) equipped with Double Fed Induction Generators (DFIG) is widely deployed. Consequently, power systems are now experiencing newer power flow patterns and operating conditions. This paper investigates the impact of a DFIG based Wind Farm (WF) on the stability of electromechanical oscillations. This is achieved by performing modal analysis to evaluate the stability of a two-area power network when subjected to different wind penetration levels and different geographical installed locations. The approach via eigenvalues analysis involves the design of voltage and Supplementary Damping Controllers (SDCs) that contribute to network damping. The effect of Power System Stabilizer (PSS) is also examined for several network conditions. Simulations demonstrate a damping improvement up to 933% when the control systems are activated and the system operates with 25% wind integration.