Energy class dependent residential battery storage sizing for PV systems in Cyprus

Stavros Afxentis,Helfried Brunner,Charalambos Anastassiou,Vasilis Machamint,Christos Yianni,Christoph Mayr,Per Norgaard,Venizelos Efthymiou,Johannes Kathan,George Elia Georghiou,Hendrik Bindner,Michalis Florides

doi:10.1049/joe.2018.9338

Abstract

Battery energy storage systems (BESS) have started to be part of the photovoltaic (PV) system design to allow the further penetration of PV into the grid. This study deals with the sizing (power and energy capacity) of a BESS for residential households which are represented by a typical load consumption profile, they have electrical air conditioning and electrical water heating (water boiler) resembling a common residential house in Cyprus. The BESS sizing is done considering the local energy consumption profile and the energy efficiency class of the house and the water boiler. The BESS is sized in order to achieve zero PV grid export and to increase self-consumption.

Highlights

The recent price reduction of photovoltaic (PV) systems has brought the technology to the forefront rendering it as a very attractive alternative to fossil fuel generation
This study describes a case study of a household which consists of an existing solar PV system and two flexible loads that strongly depend on the season, namely a water boiler (WB) and a house air conditioning (AC) system
The simulation of either the WB or the house AC system is done separately in order to investigate the influence each system has on the battery size for different efficiency class (EEC) under different ambient temperatures

Summary

Introduction

The recent price reduction of photovoltaic (PV) systems has brought the technology to the forefront rendering it as a very attractive alternative to fossil fuel generation. The increasing share of PV generation in the total installed capacity and energy production poses numerous challenges to the energy network. Amongst various solutions to support further PV deployment, the combination of energy storage systems (ESS) and demand response (DR) is a potential solution to support future smart grids and provide the desired flexibility. This combination and in particular the utilisation of battery ESS (BESS) is considered as a viable and potentially sustainable option which can offer numerous services to support grid operation. The coupling of BESS with DR flexibility can increase prosumer self-consumed electricity, in a way to alleviate grid issues that are associated with surplus energy injection to the grid

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