Battery bank sizing for a grid connected wind system
Battery bank sizing for a grid connected wind system
(OP)
Dear all,
i am designing a wind-generation grid connected system with battery system.
Are there any pointers about the size of the battery?
the load is stable and doesnt have a lot of change. The battery should cover a portion of the load and minimize export to the grid.
Any literature concerning these systems.
Thank you.
i am designing a wind-generation grid connected system with battery system.
Are there any pointers about the size of the battery?
the load is stable and doesnt have a lot of change. The battery should cover a portion of the load and minimize export to the grid.
Any literature concerning these systems.
Thank you.






RE: Battery bank sizing for a grid connected wind system
Nearly any battery capacity will help with the short-term variations in generator output - it will almost ever be a constant output, but to be able to handle long periods of calm without purchasing grid power is going to be an expensive proposition.
RE: Battery bank sizing for a grid connected wind system
are there any standards for that?
i think economics are the only boundary here.
load is mainly stable since it is a utility technical building, and only the variations of the wind should be flattened out specially the over generation.
RE: Battery bank sizing for a grid connected wind system
Discharging the full capacity of a LA battery each cycle will give you a battery life measured in tens of cycles. Whereas discharging the bank down to only about 50% of capacity may give you 500 cycles. Further, discharging the bank down to 60% may provide a 1000 cycles and 70% could provide 5,000 cycles. You see the trend here? You need to carefully design your bank to not be abused by the system's discharge/charge patterns.
Hunt down your battery's life/cycle-depth curves and see what the manufacturer recommends.
Keith Cress
kcress - http://www.flaminsystems.com