An energy storage system configuration method to stabilize power fluctuation in different operation periods

This paper has developed a practical and economical method for energy storage system (ESS) configuration to smooth the power fluctuation in distribution network feeders. The method firstly uses historical load data and the output of renewable power plant to analyse the power fluctuation in the feeder over the required time period. Then the configuration of ESS system, in terms of rated power and capacity, is calculated and determined to minimise and reduce power fluctuation in the feeder over different time-window and operating period. It is found that the ESS configuration is closely related to the operational period for which the ESS is required to smooth the feed power fluctuation, such as over typical a day or year. Furthermore, it is shown that the requirement of ESS is larger when it is required to smooth the feed power fluctuation over an operation period of one year than a day.