Compensation for reactive power and harmonic current drawn by a non-linear load in a pv-micro hydro grid

TL;DR

This paper proposes a simulation method using a Shunt Active Power Filter to improve power quality in a PV-micro hydro grid by compensating reactive power and harmonics from non-linear loads, reducing THD significantly.

Contribution

It introduces a novel simulation approach integrating SAPF with instantaneous PQ theory and hysteresis control to enhance power quality in renewable energy grids.

Findings

THD reduced from 7% to 2.96%

Effective reactive power and harmonic current compensation

Improved sinusoidal current supply to the grid

Abstract

This paper presents a simulation approach to enhance the power quality of a PV-micro hydro grid supplying both linear consumer load and non-linear industrial load by integrating Shunt Active Power Filter (SAPF), utilizing instantaneous PQ theory and hysteresis current control band logic. The non-linear load draws reactive power and harmonic current from the source thereby affecting the power quality. The integration of the SAPF at the point of common coupling (PCC) offers reactive power and harmonic current compensation, ensuring that the current supply to the grid remains nearly sinusoidal and proportional to the active power. By injecting equal and opposite harmonic components, the SAPF effectively reduces Total Harmonic Distortion (THD) from 7% to 2.96%, thereby enhancing the overall power quality of the PV-micro hydro grid system.