Energy Management System for Grid-Connected Nanogrid during COVID-19

Saif Jamal, Jagadeesh Pasupuleti, Nur Azzammudin Rahmat, Nadia M.L. Tan

    Research output: Journal PublicationArticlepeer-review

    1 Citation (Scopus)

    Abstract

    An effective energy management system (EMS) was designed based on the Stateflow (SF) approach for a grid-connected nanogrid (NG) composed of a photovoltaic (PV) array with a battery bank and supercapacitor (SC) energy storage system (ESS). The PV energy system, battery bank and SC (ESS), dual active bridge DC/DC converters, DC/AC inverters, control algorithms, and controllers were developed to test the operation of the NG. The average and high-frequency power components are separated using frequency division of the ESS power utilizing a low-pass filter; the average power is absorbed by the battery bank, while the high-frequency power is absorbed by the SC. The aim of this paper is to design an EMS to manage the energy of a grid-connected NG system considering the availability of the PV array, ESS, and demand requirements. Different scenarios of operation were tested to check the EMS behaviour during the day with a random demand profile, including: (1) a PV array with the grid supplying the load without an EMS; (2) a PV array, batteries, and the grid supplying the load with an EMS; (3) a PV array, batteries, an SC, and the grid supplying the load with an EMS; (4) a PV array, batteries, an SC, and the grid supplying the load with an EMS, with load profile reduction by 20% due to COVID-19. As per the simulation results, the proposed EMS enables the flow of power in the NG system and demonstrates the impact on the ESS by minimising carbon emissions via a reduction in grid consumption. Furthermore, the SF method is regarded as a helpful alternative to popular design approaches employing conventional software tools.

    Original languageEnglish
    Article number7689
    JournalEnergies
    Volume15
    Issue number20
    DOIs
    Publication statusPublished - Oct 2022

    Keywords

    • energy management system
    • energy storage system
    • nanogrid
    • photovoltaic
    • Stateflow

    ASJC Scopus subject areas

    • Renewable Energy, Sustainability and the Environment
    • Building and Construction
    • Fuel Technology
    • Engineering (miscellaneous)
    • Energy Engineering and Power Technology
    • Energy (miscellaneous)
    • Control and Optimization
    • Electrical and Electronic Engineering

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