Enhancing the reliability of a microgrid through optimal size of battery ESS

Optimal Sizing of Battery Energy Storage for a Grid-Connected Microgrid Subjected to Wind Uncertainties

“…Microgrid characteristics include distributed generators, renewable energy sources, storage devices, and controllable loads [2]. These characteristics make microgrids more flexible, reliable and effective [3]. Figure 1 shows the distinctions between centralized systems and microgrids.…”

“…The optimum size of the ESS is when this size minimizes the total investment and operating costs. Furthermore, the expenses and profits of exchanged energy are included in the total cost of in grid-connected microgrids [3]. There is a mathematical relationship between the size of an ESS and its cost of investment and its cost of operating microgrid.…”

“…In addition, it does not cost in terms of manufacturing or operation when an ESS is formed. There are other indexes of reliability and they also improve after the ESS has been integrated [3]. The uncertainty is important when renewable energy sources are integrated into a power system because the power output from these sources cannot be correctly determined.…”

Reliability modelling of compressed air energy storage for adequacy assessment of wind integrated power system

“…Though MCS based method can incorporate the correlations and dependencies between the system variables, these methods are computationally cumbersome and cannot provide a generic model to provide a direct solution to the reliability planning problem. The authors of [23–27] use an analytical method to evaluate the reliability value of ESS. Zhang et al [23] use the load profile modification technique to model the ESS operation and evaluates the reliability using an analytical framework.…”

“…However, in the existing literature, applications and technical characteristics specific to CAES reliability modelling have not yet been explored. A generic ESS model has been used in [16–20, 23] while a battery energy storage model has been used in [22, 27]. The CAES reliability model used in [21] lacks accurate modelling of the charging/discharging process and the components involved.…”