Power Quality Improvement in Solar Fed Cascaded Multilevel Inverter With Output Voltage Regulation Techniques

Albert Alexander Stonier,Srinivasan Murugesan,Sampath Kumar Venkatachary,Ravi Samikannu,S Senthil Kumar,Prakash Arumugam

doi:10.1109/access.2020.3027784

Abstract

The presence of harmonics in solar Photo Voltaic (PV) energy conversion system results in deterioration of power quality. To address such issue, this paper aims to investigate the elimination of harmonics in a solar fed cascaded fifteen level inverter with aid of Proportional Integral (PI), Artificial Neural Network (ANN) and Fuzzy Logic (FL) based controllers. Unlike other techniques, the proposed FLC based approach helps in obtaining reduced harmonic distortions that intend to an enhancement in power quality. In addition to the power quality improvement, this paper also proposed to provide output voltage regulation in terms of maintaining voltage and frequency at the inverter output end in compatible with the grid connection requirements. The simulations are performed in the MATLAB / Simulink environment for solar fed cascaded 15 level inverter incorporating PI, ANN and FL based controllers. To exhibit the proposed technique, a 3 kWp photovoltaic plant coupled to multilevel inverter is designed and hardware is demonstrated. All the three techniques are experimentally investigated with the measurement of power quality metrics along with establishing output voltage regulation.

Highlights

Providing electrical energy access to rural zones is a fundamental requirement as a means of improving sustainable living standards topping the agenda in many developing countries [1]–[4]
It is found that Fuzzy Logic Controller (FLC) presents better results for VR while considering the variations at the input solar Photo Voltaic (PV)
FLC is considered for the nine-level by [23], but the implementation is carried out with the DC power supplies without utilizing the solar panels

Summary

INTRODUCTION

Providing electrical energy access to rural zones is a fundamental requirement as a means of improving sustainable living standards topping the agenda in many developing countries [1]–[4]. Alexander Stonier et al.: Power Quality Improvement in Solar Fed CMLI and agriculture This impromptu pressure and challenge on the environment have encouraged the energy providers to develop further and transform the energy system in a much effective manner. With the rapid deployment of renewable energy, efficiency, economic benefits are immense and would result in significant energy security, while reducing the environmental effects This include positive developments in improved healthcare and reduction in infant mortality rates due to reduced pollution effect and countries would save millions on healthcare [6]–[8]. This disadvantage can be compensated by utilizing solar PV at its input Against this backdrop, the paper provides an elucidation to alleviate the voltage regulator control complexity and improve power quality in a solar power circuit. Section three discusses the proposed methods for the proposed system, while section four discusses the results, and lastly section five concludes the research

VOLTAGE REGULATION CONTROLLERS

SIMULATION AND ANALYSIS

Findings

CONCLUSION