Power quality improvement in an AC network using artificial neural network and hysteresis band current controller

Abdul Mutal Sulehri

doi:10.15446/ing.investig.v38n3.67885

Abstract

This paper demonstrates a study to improve the total harmonic distortion (THD) originated due to excessive use of power electronic (PE) equipment and non-linear loads. Shunt active power filter (SAPF) is used to mitigate the harmonics from the system because it has the capability of minimizing the harmonic problems initiated by non-linear loads. The instantaneous reactive power (IRP) p-q theory is used for the generation of reference signal and for the extraction of compensating components of the current. The proportional integral (PI) controller and artificial neural network (ANN) have been employed in the DC-link controller and for current errors adjustments. In this paper, both conventional hysteresis and adaptive hysteresis band current controller (HBCC) have been used for the generation of gate pulses for the SAPF, which reduces THD in the source current to a value within IEEE specified standards, without any phase error over the extensive range of adaptive HBCC strategy. Simulation results confirm that the SAPF with HBCC and ANN performs the harmonic mitigation efficiently and maintains power factor (PF) close to unity.

Highlights

The excessive use of power electronic (PE)-based devices at the distribution as well as transmission level has seriously resulted in the deterioration of power quality
This paper demonstrates a study to improve the total harmonic distortion (THD) originated due to excessive use of power electronic (PE) equipment and non-linear loads
The proportional integral (PI) controller and artificial neural network (ANN) have been employed in the DC-link controller and for current errors adjustments. Both conventional hysteresis and adaptive hysteresis band current controller (HBCC) have been used for the generation of gate pulses for the Shunt active power filter (SAPF), which reduces THD in the source current to a value within IEEE specified standards, without any phase error over the extensive range of adaptive HBCC strategy

Summary

Introduction

The excessive use of PE-based devices at the distribution as well as transmission level has seriously resulted in the deterioration of power quality. A three-phase SAPF with both PI and ANN controller is presented, employing conventional hysteresis and adaptive HBCC to address the power quality. The output of controllers and calculated instantaneous powers are used in calculation of gate signals by using both the conventional hysteresis and adaptive HBCC. The output of PI controller is loss signal, where i(load,α) and i(load,b) are used by the conventional hysteresis and adaptive HBCC for the calculation of the PWM signal and the generation of the sinusoidal waveform.

PI Controller with Conventional Hysteresis Controller

ANN and Conventional Hysteresis Controller

PI with Adaptive HBCC

Conclusion

ANN with Adaptive HBCC