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The evaluations of the energy storage density, system efficiency and power output, under the effects of insufficient charging/discharging, are presented in Fig. 8, Fig. 10, Fig. 12. The results demonstrate that the actual performance of density and power, except for the system efficiency, could highly deviate from the targets at design conditions.
Abstract: An important figure-of-merit for battery energy storage systems (BESSs) is their battery life, which is measured by the state of health (SOH). In this study, we propose a two-stage model to optimize the charging and discharging process of BESS in an industrial park microgrid (IPM).
A clearly defined sufficient charging/discharging at design conditions is a point in the phase space (noted by the star in green), while the rest of the space can be referred to as “off-design conditions”. For example, two dashed curves are given for off-design charging and discharging.
However, the effects of insufficient charging and discharging, due to the variability of renewable energy have not been investigated before. The output power and the energy density evaluated in the present work could be incorporated with future work of techno-economic analysis.
Therefore, all the scenarios for insufficient charging and discharging can be classified into four categories, which are charge begin, discharge end, charge midway and discharge midway as shown in Fig. 4. These processes will be rearranged in Sec. 4 for further analysis.
Sufficient charging/discharging only occurs on the second day, and the insufficiency extent on the first day and the third day could be about 75 and 50%, respectively. Here, the insufficiency extent of charging/discharging is evaluated by the normalized pressure at the high-pressure tank. Fig. 1.
Two-stage charge and discharge optimization of battery energy … In this study, we propose a two-stage model to optimize the charging and discharging process of BESS in an industrial …
In this paper, two charging/discharging strategies for the grid- scale ESS were proposed to decide when and with how much power to charge/discharge the ESS. In order to...
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An important figure-of-merit for battery energy storage systems (BESSs) is their battery life, which is measured by the state of health (SOH). In this study, we propose a two-stage model to …
In this study, we propose a two-stage model to optimize the charging and discharging process of BESS in an industrial park microgrid (IPM). The first stage is used to optimize the charging …
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In this paper, two charging/discharging strategies for the grid- scale ESS were proposed to decide when and with how much power to charge/discharge the ESS. In order to...
In this study, we propose a two-stage model to optimize the charging and discharging process of BESS in an industrial park microgrid (IPM). The first stage is used to optimize the charging …
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