Abstract
This paper proposes an Energy Management System (EMS) of an off-grid residential microgrid comprised of a solar photovoltaic array, wind turbine, and a battery-based energy storage system for a residential building in a remote area. The aim is to design a less complex energy management system that addresses energy resources dispatch challenge in a hybrid residential microgrid. It equitably dispatches resources and manages the generated energy to meet the residential load. The management control system algorithm is implemented using the state machine and simulated in MATLAB/Simulink environment for validation. Three scenarios are simulated, they emulate various contingencies scenarios that might rise due to the intermittency nature of the renewable resources. Simulation results show that the proposed energy management system achieves its design objectives. It maintains the power supply and demand balance, through an appropriate scheduling of resources even during contingency due to the intermittence nature of the renewable resources
Highlights
Access to energy in rural and urban areas is a challenge in developing countries
Most authors focused on energy management systems for application in grid-tied residential microgrids with enhanced features such as energy prediction, which rely on communication, rendering the system complex and expensive for application in off-grid rural areas [25]
The energy access is a challenge for rural community and renewable energy based hybrid residential microgrid emerged as a viable solution
Summary
Access to energy in rural and urban areas is a challenge in developing countries. The reliability of power supply in electrified areas and environmental awareness opens the door for microgrids. Microgrids are defined as a cluster of loads and power generating units operating as a single controllable system with the ability to be connected or not to a grid [1]. Hybrid microgrids are characterized by different renewable energy resources, technologies and an energy storage system for an increased power supply reliability. Energy and power management schemes are critical aspects for hybrid microgrid operation [15]. Olatomiwa et al [22] presented a comprehensive review on energy management strategies in hybrid renewable energy They analyzed various techniques and strategies used in isolated and grid-connected microgrids. Most authors focused on energy management systems for application in grid-tied residential microgrids with enhanced features such as energy prediction, which rely on communication, rendering the system complex and expensive for application in off-grid rural areas [25].
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