Abstract
Due to the increasing use of renewable, non-controllable energy generation systems energy storage systems (ESS) are seen as a necessary part of future power delivery systems. ESS have gained research interest and practical implementation over the past decade and this is expected to continue into the future. This is due to the economic and operational benefits for both network operators and customers, battery energy storage system (BESS) is used as the main focus of this research paper. This paper presents an analytical study of the benefits of deploying distributed BESS in an electrical distribution network (DN). The work explores the optimum location of installing BESS and its impact on the DN performance and possible future investment. This study provides a comparison between bulk energy storage installed at three different locations; medium voltage (MV) side and low voltage (LV) side of the distribution transformer (DT) and distributed energy storage at customers’ feeders. The performance of a typical UK DN is examined under different penetration levels of wind energy generation units and BESS. The results show that the minimum storage size is obtained when BESS is installed next to the DT. However, the power loss is reduced to its minimum when BESS and wind energy are both distributed at load busbars. The study demonstrates that BESS installation has improved the loss of life factor of the distribution transformer.
Highlights
The traditional electricity market had to deal with challenges in supply–demand balance, but the introduction of renewable energy sources has resulted in a market need for energy storage systems.The traditional view has been that electricity should be consumed at the same instant that it is generated, i.e., the amount of electricity generated must always match the load demand
This study investigated the integration of battery energy storage system (BESS) and WT’s at various locations in the distribution network
This study has addressed the integration of energy storage systems and renewable energy sources into a distribution network
Summary
The traditional electricity market had to deal with challenges in supply–demand balance, but the introduction of renewable energy sources has resulted in a market need for energy storage systems.The traditional view has been that electricity should be consumed at the same instant that it is generated, i.e., the amount of electricity generated must always match the load demand. The traditional electricity market had to deal with challenges in supply–demand balance, but the introduction of renewable energy sources has resulted in a market need for energy storage systems. Any imbalance between generation and consumption will damage the stability and quality of the electrical supply grid parameters [1]. E.g., batteries, have played vital roles in everyday applications for many decades, the power demand has tended to be at low levels. For power plants and substations, batteries are used as a reliable power source for the operation of switchgear, critical standby systems and possibly black start of stations [2]. Due to the variability of generation of electricity from wind, solar, etc., the need for larger-scale storage of energy has developed. Grid-scale battery storage units have recently shown an improvement in both
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