Optimal Operation of a Residential Battery Energy Storage System in a Time-of-Use Pricing Environment

Charalampos Galatsopoulos,Chrysovalantou Ziogou,Spyros Voutetakis,Dimitris Trigkas,Simira Papadopoulou

doi:10.3390/app10175997

Abstract

Premature ageing of lithium-ion battery energy storage systems (BESS) is a common problem in applications with or without renewable energy sources (RES) in the household sector. It can result to significant issues for such systems such as inability of the system to cover load demand for a long period of time. Consequently, the necessity of limiting the degradation effects at a BESS leads to the development and application of energy management strategies (EMS). In this work, EMSs are proposed in order to define optimal operation of a BESS without RES under time-of-use (ToU) tariff conditions. The objective of the developed EMSs is to reduce the capacity loss at the BESS in order to extend its lifetime expectancy and therefore increase the economic profit in the long-term. The EMSs utilize a widely used battery mathematical model which is experimentally validated for a specific BESS and a battery degradation mathematical model from the literature. Indicative simulation results of the proposed strategies are presented. The outcomes of these simulated scenarios illustrate that the objectives are achieved. The BESS operates efficiently by preventing premature ageing and ensuring higher economic profit at the long term.

Highlights

In recent years, the excessive global increment of energy consumption and the issue of environmental pollution has led to the shift towards a green economy
By setting to the model the maximum permissible depth of discharge (DOD) (80%) and charging/discharging rate (Crate) (0.33C) which are provided by the battery manufacturer the ageing trajectory is obtained (Figure 9)
This work demonstrated the development of two energy management strategies (EMS) for a residential battery energy storage systems (BESS)

Summary

Introduction

The excessive global increment of energy consumption and the issue of environmental pollution has led to the shift towards a green economy. In [2,3] it is analyzed that the application of a photovoltaic (PV) battery system in a household is a significantly challenging issue regarding its sustainability. This is mainly due to the high investment costs for the development of a BESS. In most countries single rate (SR) energy tariffs and time-of-use (ToU) energy tariffs are used. This implies that applying a BESS without renewable energy sources (RES) is at the first case (SR) infeasible and at the second case (ToU) extremely challenging

Objectives

Results

Conclusion