Abstract

This article proposes a multiobjective hybrid energy management system that minimizes both the electricity expenses and the household greenhouse gas emissions released due to consumption, considering the entire life cycle of the generation assets used to provide energy. The global warming potential indicator is used to decide if it is more sustainable to purchase electricity from the grid or use the household's flexible generation sources like photovoltaic panels and the energy storage system. Results prove that it is possible to reduce greenhouse gas emissions without incurring expensive electricity bill costs thanks to the hybrid-based home energy management system approach. This method gives the end-users a more influential role in the climate change solution, allowing them to give more or less importance to the economic or environmental component, according to their preferences.

Highlights

  • G LOBAL carbon dioxide emissions reached in 2019 an all-time high, despite coal fading [1]

  • This article introduces a novel hybrid-based home energy management systems (HEMS) formulation that optimizes the operation of PV generators and distributed storage units behind-the-meter in order to achieve the best tradeoff between electricity cost and greenhouse gas (GHG) emissions minimization, considering a life cycle analysis of the generation sources used to meet the household demand

  • The results confirm the reduction of GHG emissions in the HEMS containing the environmental component

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Summary

INTRODUCTION

G LOBAL carbon dioxide emissions reached in 2019 an all-time high, despite coal fading [1]. Several studies have applied multiobjective functions HEMS for optimal scheduling considering electricity cost and end-user discomfort minimization [4]–[12]. A third environmental-based (EB) category has been proposed in [15], which focuses on minimizing the GHG emissions produced by the generation units that provide electricity to the household. BARJA-MARTINEZ et al.: NOVEL HYBRID HEMS CONSIDERING ELECTRICITY COST AND GHG EMISSIONS MINIMIZATION. To the best of the authors knowledge, no HEMS approach in literature focuses on both electricity bill and GHG minimization. 1) The development of a multiobjective hybrid HEMS that minimizes the costs and the GHG emissions associated with generators that produce the electricity that the household consumes by assigning weights to the two competing objectives. This article is an extension of previous study conducted by the authors [15]

LCA FOR ELECTRICITY GENERATION SYSTEMS: A TIME-VARYING GWP APPROACH
HEMS Objective Function
Energy Storage System
CASE STUDIES
RESULTS
Price-Based Scenario
Scenario A
Scenario B
Sensitivity Analysis
Results Comparison and Discussion
CONCLUSION
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