THD analysis and stability enhancement of PID controller in SRF-based shunt active filter under different design criteria using GWO technique

Abstract

Power electronic devices are essential to industrial processes, research, and development, it provides high efficiency, low cost, fast operation, and ideal dimensions. Power systems are significantly affected by harmonics, which are mainly generated by non-linear loads and power conversion technologies, including static converters, breakers, cycloconverters, battery charging systems, and heating components. Various filtering methods are available for harmonic suppression, among which the active power shunt filter is one of the most significant and effective. Harmonics are suppressed and system efficiency is improved using the Grey Wolf Optimization (GWO) approach. The design criteria are integrated into the cost function itself. Using various design criteria, the performance of a shunt active power filter is investigated. The design criteria used are Integral square error (ISE), Integral absolute error (IAE), Integral time absolute error (ITAE), and Integral time square error (ITSE) with ITAE having the best performance.