Deployment of Unified Power Quality Conditioner in a 33 kV Distribution Network Using MFO-ANFIS

Abstract

Power quality issues are often experienced along distribution lines. These challenges are in the form of voltage sag and swells, excessive power losses, and harmonic distortions at common points. Faults and non-linear loads are mostly responsible for introducing these power qualities which can be experienced as harmonics. Harmonics affect the quality of power on the affected lines or other parallel loads. The Unified Power Quality Conditioner (UPQC) has emerged as a promising solution to these power quality issues. The UPQC comprises of the Dynamic Voltage Restorer (DVR) for voltage related issues, and the Distribution Static Compensators (DSTATCOM) for current related issues. In this paper, the UPQC and a 33kV three-phase four wire distribution line of system are designed using MATLAB/Simulink. Simulink as a three-phase four-wire system. The DVR and DSTATCOM are designed using a 3-phase universal gate in IGBT mode as series and shunt filter respectively. The former compensates foe voltage sag or swell while the latter, compensates the current levels. One crucial component is a controller for the UPQC and this is done using a Moth-Flame Optimized Adaptive Neuro-fuzzy Inference System (MFO-ANFIS). The study compared the total harmonic distortion (THD) at the Point of common coupling (Pcc) in the current for two scenarios – without UPQC, and with MFO-ANFIS-controlled UPQC. The MFO-ANFIS performed very well with THD of 7.02% which is within the acceptable standards of IEEE-519.