Document Type : Research Article

Authors

• sathyanarayana p ¹
• I.E.S Naidu ²

¹ Gitam

² Department of Electrical Electronics and Communication Engineering, GITAM School of Technology, Visakhapatnam

Abstract

In this research, a newly designed Grid-connected Photovoltaic (PV), HES based microgrid system is developed and a suitable Power Management Technique (PMT) is suggested with a Modified Power Management Algorithm (MPMA) to enhance system efficiency and reliability. The suggested PMT effectively regulate the DC voltage during the variation of PV generation, manage the power flow and power quality. The developed MG system component is interconnected to the DC bus through suitable controlled converters. PMT is used to generate the accurate reference signal using the MPMA which strengthens the accuracy level of the pulse of the converters and hence results quick adjustment of the DC-Link voltage and smoothly manage the power flow among various sources and improve the power quality by bringing the Total Harmonics Distortion (THD) level to 2.96% recommended under IEEE 519 standard. It also provides encouraging results of settling time of 0.2 sec and peak over shoot of only 2.80%. Battery and Super capacitor are used to enhance stability and continuity of smooth operation, in addition, super capacitor provides backup and also reduces the strain of the battery during transient condition. The effectiveness of the developed PMT with the designed microgrid is verified with MATLAB/SIMULINK Platform

Keywords

• Photovoltaic
• Hybrid Energy Storage System
• Power Management Techniques
• Modified Power Management Algorithm
• Proportional Integral Controller
• Microgrid