Abstract
The transition to low carbon energy systems requires more Renewable Energy Sources (RES) into the electricity grid. However, the high penetration of RESs may cause a significant reduction in the power system inertial response, which may adversely affect the frequency regulation. Many studies utilized the Battery Energy Storage System (BESS) to participate in frequency regulation services, where most of the research were using a large-scale BESS in one location. This paper presents an analysis to investigate the impact of the distribution of the BESS throughout the network on frequency regulation performance. The frequency responses of twenty different BESS allocation scenarios and under two different RES penetration levels have been compared, with the same aggregated BESS capacity, which is 100 MVA - just the total capacity has been distributed throughout the network. The simplified 14 generator South-Eastern Australian power system has been simulated by using DigSILENT/PowerFactory software. The simulation results have shown that the distribution of the BESS in multiple locations have demonstrated better frequency nadir. However, the improvement in the Rate of Change of Frequency (ROCOF) were dependent on the BESS locations.