A schematic of dc microgrid

A schematic of the dc microgrid with the conventions employed for power is given in Figure. The dc bus connects wind energy conversion system (WECS), PV panels, multilevel energy storage comprising battery energy storage system (BESS) and supercapacitor, EV smart charging points, EV fast charging station, and grid interface. The WECS is connected to the dc bus via an ac–dc converter. PV panels are connected to the dc bus via a dc–dc converter. The BESS can be realized through flow battery technology connected to the dc bus via a dc–dc converter. The supercapacitor has much less energy capacity than the BESS. Rather, it is aimed at compensating for fast fluctuations of power and so provides cache control.

Kai Strunz, Ehsan Abbasi and Duc Nguyen Huu “DC Microgrid for Wind and Solar Power Integration” IEEE Journal of Emerging and Selected Topics in Power Electronics, Vol. 2, No. 1, March 2014.


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