A Battery-Based Energy Management Approach for Weak Microgrid System

Abstract

The conversion loss is the significant challenge due to the usage of multiple converters at different stages of a power distribution system. These stages include distribution of energy, energy storage, grid integration, and energy demand management. The conversion losses at each stage adversely impacts the performance of the power system, especially toward energy conservation if efforts are made toward it. To address this, a novel microgrid (MG) energy management scheme is introduced to mitigate conversion losses in distribution systems specifically under weak MG environment. This scheme employs a sophisticated control algorithm that assesses the potency of power available on the DC side before initiation of the conversion process. Conversion is executed only when available power meets the specific level. Otherwise, it is diverted and stored in a battery bank to prevent high losses. In this scenario, the AC loads are supplied by the utility grid while solar and battery bank catered the DC loads. The conversion process is selectively activated, prioritizing its use during indispensable circumstances. By optimizing conversion losses, this work reduces the energy prices by 1.95%. The proposed scheme guarantees economical deployment and affordability because of its effectiveness in a weak MG environment, thus promoting sustainable energy resources.