Patent ID: 9442165
Filing Date: 2016-09-13
CPC Classification: G01R,H01M,H02J,Y02E,Y02P,Y04S

Claim Text:
1. A method for estimating battery life in power management of a microgrid with an energy storage device that includes charging and discharging modes, comprising: i) receiving power data from different generation sources, storage state of charge and a storage discharge pattern; ii) estimating a storage lifetime and determining cost of energy from the energy storage device which includes estimating battery life that considers a supercycle (SC) of a battery as a single discharge unit instead of treating each individual discharge period separately, the supercycle defines a time window between two consecutive full charges of a battery which allows assessing a worst case scenario impact of all partial cycles within a supercycle on the battery life; and iii) allocating desired power between the energy storage device and a power grid to minimize cost of energy through reduced grid power or feed-in-tariff while maximizing storage lifetime based on a final energy cost; wherein steps i)-iii) are implemented by a computer.