Solar farm integrated with BESS

[Afshin]

What steps can we take to ensure that our system prioritizes charging the Battery Energy Storage System (BESS) before supplying excess power to the grid? I'm particularly interested in achieving a scenario where the power supplied to the Electrical Grid (E_Grid) approaches zero, while the majority of the kilowatt-hours (kWh) are stored in the Battery (E-Bat) in the following result table. 

 

[Linda Thoren]

Dear Afshin,

For a Grid-connected system with energy storage, any excess power will be stored in the battery before supplying energy to the grid. If the battery storage is fully charged, you have the choice to inject power to the grid or not by ticking the box “Allow solar injection into the grid” in the Operating conditions box.

Regards

[Afshin]

Thank you! Actually, I wanted a scenario that the PV system charges the batteries first and then if we have extra power, we can feed the grid. For example, I have 2-MW solar system and 10-MW BESS. I need to first charge the BESS completely. 

[Linda Thoren]

In PVsyst we have 3 strategies for Grid-storage. In the Self consumption strategy, the produced electricity from your PV system will firstly supply the user’s need (consumption), secondly charge the BESS and lastly supply energy to the grid. With the Peak shaving strategy doesn’t involve an internal use of the energy and you can define the operating conditions such as Grid power limit and discharging. In the Weak grid islanding strategy, you define the Grid unavailability and your storage pack is meant to fill up for the times when you have no production from your solar panel, nor power from the grid.

You can read more about this in the PVsyst help in the following link:
https://www.pvsyst.com/help/grid_storage.htm

Or watch some of the youtube-videos we have on the topic:
https://www.youtube.com/watch?v=-PGRnnF1VuA&list=PLxdyykgAqoynTXUHWrdCxPSYLkhJ9mW7c

https://www.youtube.com/watch?v=49d5pAV907Y&list=PLxdyykgAqoynTXUHWrdCxPSYLkhJ9mW7c&index=3

https://www.youtube.com/watch?v=jZKdz248WJQ&list=PLxdyykgAqoynTXUHWrdCxPSYLkhJ9mW7c&index=4

Regards