LQR-Based Control Strategy for Subsynchronous Resonance Suppression in DFIG Wind Farms

Subsynchronous Resonance (SSR) mitigation of a wind farm which is connected to transmission line of type series compensated has emerged as a key concern with the developing integration of wide-reaching wind farms into the power system. In this study, a Linear Quadratic Regulator (LQR) management method is suggested for reducing Wind farm SSR which is DFIG based where series compensated lines are connected. The state-space abstraction of the DFIG wind farm system, which comprises the dynamics of the generator wind turbine categorized as DFIG, the series compensation system with the transmission line, serves as the foundation for the suggested control method. The LQR system regulator is made to reduce SSR and keep the system reliable under a variety of operating circumstances. To assess the effectiveness of the developed controller, a simulation study is conducted on a 100 MW wind farm composed of 66 individual 1.5 MW turbines. Results from simulations show how well the LQR controller controls SSR and keeps the system functioning. The efficiency of the LQR controller in suppressing SSR and preserving system stability under various operating situations is shown by the simulation results. In a notable simulation scenario with 55% series compensation, the LQR controller demonstrates significant performance. The results indicate a remarkable reduction in SSR effects and improvement in system stability and control efficiency. So, efficient method of reducing SSR in wind farms associated to the arrangement of transmission line that is compensated is offered by the suggested control strategy.