Abstract
The aim of this work is to analyze and stabilize the power system when connecting an energy storage system (ESS) to replace the traditional power reserve of a power plant. Thus, it is necessary to validate and simulate the power facility protection system using a relay coordination approach. The input feasibility of the generator for the frequency regulation (FR) of the operational ESS is also validated through detailed analysis studies including power flow, short circuit and relay coordination analysis. The case scenarios for ESS installation are categorized based on its operation mode and location in the power system. These studies are carried out on the power system at the peak load condition specified for both grids. With the electrical transient analyzer program (ETAP), an analysis is performed to study the implementation of the ESS in a large, integrated power system to determine which location best fits the installation of ESS considering the load flow, short circuit and relay coordination results in each case scenario. Cost evaluation was performed for the choice of locations under study.
Highlights
Energy storage systems (ESSs) offer technical, economic and environmental benefits in power systems; their implementation in distribution networks has increased
A method of carrying out a feasibility study for the installation of an ESS in a power system based on the case scenarios is proposed
The result from the load flow studies for each case scenario showed that the overloading of equipment occurred at bus 5 with a percentage loading of 117.5% when the load ESS was installed at the lower-voltage (6.9 kV) level in the power system, which could damage the equipment
Summary
Energy storage systems (ESSs) offer technical, economic and environmental benefits in power systems; their implementation in distribution networks has increased. These benefits include power quality improvement, frequency regulation, the mitigation of voltage deviation, the facilitation of renewable energy source (RES) integration, power network expansion and overall cost reduction, among others. The energy storage needs to have an appropriate rated power and energy capacity [3] This represents essential equipment that provides an attractive means of restoring the balance between power demand and supply. We propose a software approach for the investigation of ESS installation positions by considering the ESS’s capacity size and the power grid under peak load conditions. The alert function of the load flow and short circuit modules of the electrical transient analyzer program (ETAP) represent a convenient way to size protective devices at the facility
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