Energy Storage System and Its Power Electronic Interface

Energy Storage System Interfacing To Grid

The converter of power electronics or module is an assembly including many power elements, mostly semiconductor device, properly connected to do the power conversion function. The functions of power converter positioned at the middle is to control the energy flow between a given power grid to the electrical energy storage system (De et al. 2013; Alhelou et al., 2019; Makdisie et al., 2018; Alhelou et al., 2018; Alhelou et al., 2016; Haes Alhelou et al., 2019; Njenda et al., 2018). A realistic converter design must approach 100% efficient. The energy storage system (ESS) is planned to balance with power supply as well as to store energy at the time of high peak power generation, which can be consequently exploited to supply electricity at the time of high demand (Bouzid et al. 2015; Khan et al. 2014; Khan et al. 2013; Khan et al. 2012; Negash et al., 2017; Negash et al., 2016; Jariso et al. 2017; Kifle et al. 2018; Yeshalem et al. 2017; Singh et al. 2017; Gupta et al., 2015). So, the main target of the power bidirectional inverter-rectifier to concurrently reserve the battery SOC within safe boundaries and to smooth the power profile exchanged with the grid, i.e., minimizing the grid power fluctuations and grid power peaks (Fini et al., 2016; Alhelou et al., 2018; Zamani et al., 2018; Alhelou et al., 2015; Njenda et al., 2018; Haes Alhelou et al., 2018; Haes Alhelou et al., 2019). Figure 1 presents the block diagram of energy storage integrated to the grid.

Figure 1.

Block diagram of energy storage integrated to the grid