Battery Energy Storage System for Emergency Supply and Improved Reliability of Power Networks

Marcin Szott,Grzegorz Benysek,Marcin Jarnut,Jacek Kaniewski,Szymon Wermiński

doi:10.3390/en14030720

Marcin Szott, Grzegorz Benysek + Show 3 more

Open Access

https://doi.org/10.3390/en14030720

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Journal: Energies	Publication Date: Jan 30, 2021
Citations: 6	License type: CC BY 4.0

Affiliation: University of Zielona Góra

Abstract

This paper introduces the concept of a battery energy storage system as an emergency power supply for a separated power network, with the possibility of island operation for a power substation with one-side supply. This system, with an appropriately sized energy storage capacity, allows improvement in the continuity of the power supply and increases the reliability of the separated network at a specified time during the limitation of power transmission as a result of damage or disconnection of the main power line. This paper presents and describes a specific method of energy storage system dimensioning based on real measurement data. Based on the obtained parameters, an analysis of the reliability improvement of the considered network was performed. The implementation of the battery energy storage system will contribute to a more than 5-fold reduction in the occurrence of power outages in the time interval from 3 min to 1.5 h, which will clearly reduce the System Average Interruption Frequency Index and System Average Interruption Duration Index factors. In this paper, the network conditions for operational normality and failure are presented and the cost for implementation of an energy storage system (about EUR 1 million) is compared with the possible implementation of an additional power line (about EUR 5 million) to a specific power substation.

Highlights

IntroductionThe main role of an electric power system (EPS) is to provide uninterrupted electricity at an appropriate quality
The quality standards of electricity in public networks are defined in the European standard EN 50160 [1]
The object analysis allows the determination of appropriate measurement points

Summary

Introduction

The main role of an electric power system (EPS) is to provide uninterrupted electricity at an appropriate quality. The quality standards of electricity in public networks are defined in the European standard EN 50160 [1]. These standards define such parameters as: frequency and voltage value [2], rapid voltage changes “flicker” [3], voltage dips and swells [4], voltage asymmetry [5], and short and long power interruptions. The area that the authors focus on is power interruptions.

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