PSO-GWO Optimized TID Controller Based Hybrid Shunt Active Power Filter for Power Quality Improvement

Authors:

I.Priyanka¹, Sri A.Surya Prakasa Rao² Assistant Professor

¹ Electrical and Electronics Engineering, Sir C. R. Reddy College of Engineering(A), Eluru.

Abstract:

Power quality has become a significant issue in modern electrical power systems due to the widespread use of nonlinear and power electronic-based loads such as rectifiers, inverters, adjustable speed drives, and industrial converters. These nonlinear loads generate harmonics, reactive power burden, voltage distortion, and poor power factor, which reduce system efficiency, stability, and reliability. Conventional passive filters provide limited harmonic compensation and suffer from resonance problems, while active power filters offer better compensation with increased complexity and cost. To overcome these limitations, this work proposes a PSO-GWO Optimized Tilt Integral Derivative (TID) Controller Based Hybrid Shunt Active Power Filter (HSAPF) for effective power quality improvement. The proposed HSAPF combines passive and active filtering techniques to compensate both lower-order and higher-order harmonics. The passive filter suppresses dominant harmonic frequencies, while the active filter dynamically injects compensating currents through a Voltage Source Inverter (VSI) to improve source current quality and maintain stable operation.

A Tilt Integral Derivative (TID) controller is employed to regulate the DC-link voltage and generate switching signals for harmonic compensation. To achieve optimal controller performance, a hybrid Particle Swarm Optimization–Grey Wolf Optimization (PSO-GWO) algorithm is used to tune the controller parameters automatically. The complete system is modeled and simulated in MATLAB/Simulink under three operating conditions: without filter, with passive filter, and with the proposed HSAPF. Simulation results demonstrate that the uncompensated system exhibits severe harmonic distortion with THD of 31.6%, while the passive filter reduces THD moderately to nearly 14%–18%. The proposed PSO-GWO optimized HSAPF significantly reduces THD to nearly 2%–4%, improves power factor close to unity, enhances source current waveform quality, and increases overall system stability and efficiency. The results confirm that the proposed system provides superior harmonic mitigation and effective power quality enhancement for modern electrical power systems

Keywords: Hybrid Shunt Active Power Filter (HSAPF), Power Quality Improvement, Total Harmonic Distortion (THD), Tilt Integral Derivative (TID) Controller, Particle Swarm Optimization (PSO), Grey Wolf Optimization (GWO), PSO-GWO Algorithm, Harmonic Compensation, Active Power Filter (APF), Passive Power Filter (PPF), Voltage Source Inverter (VSI), Nonlinear Loads, Reactive Power Compensation, MATLAB/Simulink, Harmonic Mitigation.