Reduction of operational cost using energy storage management and demand response

摘要

A method for managing demand or load includes, upon receipt of a demand response signal or a load management request from a utility to change the price of electricity, determining the cost of energy from a local battery, and if the cost of energy from battery is higher than the cost of electricity from the utility, shedding power from one or more devices based on the utility price, and otherwise discharging power from the battery to reduce a net load on the grid without any actual load reduction.

主权项

1. A method for managing demand or load, comprising:
receiving input demand by a real-time power and load management controller; information including different generation power, storage state of charge, and end-user demand; determining a discharge pattern of a storage used to estimate the battery lifetime and determining discharge event for the local battery as:L1=(DADR)u0⁢ⅇu1⁡(DADR-1)L2=CRCAwhere parameters u0 and u1 are determined by fitting cycle life versus depth of discharge (DOD) data, DA is a depth of discharge of a discharge event, DR is a rated depth of discharge, CR is a rated capacity of a battery at rated discharge current, and CA is determined by applying a one dimensional cubic spline interpolation on finite pairs of data for battery capacities versus discharge currents;
upon receipt of a demand response signal or a load management request from a utility to change a price of electricity, determining a cost of energy from a local battery, calculating a cost of energy from the battery based on a levelized cost model, wherein the cost of energy from the battery is then compared to the utility cost; if the cost of energy from battery is higher than the cost of electricity from the utility, shedding power from one or more devices based on the utility cost, and otherwise discharging power from the battery to reduce a net load on the grid without any actual load reduction.