Abstract

Presently, the advancements in the electric system, smart meters, and implementation of renewable energy sources (RES) have yielded extensive changes to the current power grid. This technological innovation in the power grid enhances the generation of electricity to meet the demands of industrial, commercial and residential sectors. However, the industrial sectors are the focus of power grid and its demand-side management (DSM) activities. Neglecting other sectors in the DSM activities can deteriorate the total performance of the power grid. Hence, the notion of DSM and demand response by way of the residential sector makes the smart grid preferable to the current power grid. In this circumstance, this paper proposes a home energy management system (HEMS) that considered the residential sector in DSM activities and the integration of RES and energy storage system (ESS). The proposed HEMS reduces the electricity cost through scheduling of household appliances and ESS in response to the time-of-use (ToU) and critical peak price (CPP) of the electricity market. The proposed HEMS is implemented using the Earliglow based algorithm. For comparative analysis, the simulation results of the proposed method are compared with other methods: Jaya algorithm, enhanced differential evolution and strawberry algorithm. The simulation results of Earliglow based optimization method show that the integration of RES and ESS can provide electricity cost savings up to 62.80% and 20.89% for CPP and ToU. In addition, electricity cost reduction up to 43.25% and 13.83% under the CPP and ToU market prices, respectively.

Highlights

  • The aging power grid infrastructure is gradually improving due to the emerging technological innovations

  • This paper proposes a model for smart grid (SG) that handles the emerging advancement in technology of smart households and the power grid

  • It is established that integrating the renewable energy sources (RES) and the proposed optimization algorithm with its solution optimally addresses the multi-objective scheduling problem

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Summary

Introduction

The aging power grid infrastructure is gradually improving due to the emerging technological innovations. DSM uses demand response (DR) which plays a significant role in the operation of the power grid by shifting the electricity usage during the peak period in response to the market prices. This involves other forms of financial incentives as well as balancing supply and demand. To efficiently implement the DSM strategies, home energy management system (HEMS) is used to minimize the generation cost of electricity by shifting certain household loads to off-peak hours. This can be done by optimally adjusting the energy obtained from the power grid.

Related Work
Problem Statement
Shiftable Appliances
Non Shiftable Appliances
Electricity Cost
Energy Consumption
Load Balancing
Objective Function
Electricity Price Models
Proposed Schemes
Jaya Algorithm
Simulations and Discussions
Performance Trade-Off Made by Optimization Schemes
Hourly Load Behavior of Household Appliances
FR for Electricity Cost and Energy Load
FR for Cost and Waiting Time
Findings
Conclusions and Future Work
Full Text
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