Improving the dynamic performance of grid connected wind farms using modern UPFC

Abstract

Reliable power from Wind energy is one of the promising non-conventional energy sources for the future. But the fluctuating nature of wind introduces power quality problems affects the stability of the entire grid. Another issue is that power system grid is non-linear dynamic system which needs plenty of real and reactive power to provide its load and power loss is unreliable. Nowadays Flexible AC Transmission Systems (FACTS) controllers are handling a transmission line power surges which magnify the entire grid operation. This manuscript aims at reducing the power quality issues using Unified Power Flow Controller (UPFC) which is interconnected at the Point of Common Coupling (PCC) to improves the transmission ability of the system and enhance the dynamic response of ac grids. The distortions in the waveform are reduced by the proper switching of the semiconductor devices of the UPFC. The switching is controlled using a PI controller with current controlled Pulse Width Modulation (PWM). The gains of the PI controller are tuned using Modified Particle Swarm Optimization Technique (MPSO). The power quality is then analyzed with Total Harmonics Distortion (THD) and the performance is simulated in SIMULINK/MATLAB. These results are acquired by means of modified Particle Swarm Optimization (MPSO), to demonstrate the superiority of the proposed method, the simulation conceded out on grid connected wind power system with Proportional Integral Controller, Fuzzy Logic Controller, Artificial Bee Colony Algorithm and Modified Particle swarm Optimization.