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1. (WO2018222858) ENERGY STORAGE SYSTEM HAVING A MULTI-PORT DC/DC POWER CONVERTER

Pub. No.:    WO/2018/222858    International Application No.:    PCT/US2018/035371
Publication Date: Fri Dec 07 00:59:59 CET 2018 International Filing Date: Fri Jun 01 01:59:59 CEST 2018
IPC: H02J 3/38
H02J 5/00
H02J 7/34
Applicants: GENERAL ELECTRIC COMPANY
Inventors: TEICHMANN, Ralph
HANSEN, Lukas
SCHELENZ, Owen
Title: ENERGY STORAGE SYSTEM HAVING A MULTI-PORT DC/DC POWER CONVERTER
Abstract:
Controlling an energy storage system includes providing an output power from a renewable power module to a voltage bus, a buck-boost converter of respective power converters regulating power flow between the voltage bus and one or more respective batteries to: if the output power exceeds a power limit of a power network inverter coupled to the voltage bus, charging one or more batteries with at least a portion of the output power. Also, if the power network has excess power, charging one or more of the batteries with at least a portion of the power network excess power, and if the output power is below the network inverter power limit, discharging one or more of the batteries on to the voltage bus. The method including instituting a time delay prior to discharging one or more of the batteries. A system for implementing the method and a non-transitory computer-readable medium are also disclosed.