I am designing the optimal HESS capacity for the renewable system.
I have to select the cutoff frequency of low pass filter to divide the low and high-frequency components.
charge and discharge cycles increase with the frequency.
same is the effect on maximum required capacity i.e low cutoff frequency implies low power capacity required for low-frequency components.
There is a trade-off between depth of discharge and no. of cycles. But, at this stage, I cannot measure the DoD due to the fact that I don't have rated capacity.
So, is there any way to define the optimal cutoff frequency?
There are limitations of charging and discharging in storage devices during each time interval, the following limitations and equations can be expressed for a battery which is attached below in the manuscript section 2.6.3.
The purpose of a battery is to store energy and release it at a desired time. This section examines discharging under different C-rates and evaluates the depth of discharge to which a battery can safely go. The document also observes different discharge signatures and explores battery life under diverse loading patterns.
The electrochemical battery has the advantage over other energy storage devices in that the energy stays high during most of the charge and then drops rapidly as the charge depletes. The supercapacitor has a linear discharge, and compressed air and a flywheel storage device is the inverse of the battery by delivering the highest power at the beginning. Figures 1, 2 and 3 illustrate the simulated discharge characteristics of stored energy.
https://www.forbes.com/sites/arielcohen/2020/12/30/teslas-new-lithium-ion-patent-brings-company-closer-to-promised-1-million-mile-battery/amp/https://www.forbes.com/sites/arielcohen/2020/12/30/teslas-new-lithium-ion-patent-brings-company-closer-to-promised-1-million-mile-battery/amp/
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