Reduction of operational cost using energy storage management and demand response
AssigneeNEC Laboratories America, Inc.
InventorsBabak Asghari, Ratnesh Sharma
Life of this patent
Estimating the term…
Abstract
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.
Claims21
A method for managing demand or load, comprising:
- 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.
1A. The method of claim 1, comprising:
- detecting an unbalance in a supply and a demand based on a measured distributed generation (DG) output and a load demand;
- and
- if a DG generation of power is more than the demand and an energy storage unit is not fully charged, applying the excess energy generation to charge the storage unit.
A system for energy management, comprising:
- An energy storage unit;
- a computer coupled to a distributed generator (DG) and a grid;
- a primary management unit for detecting an unbalance in a supply and a demand based on a measured distributed generation output and a load demand;
- and
- a secondary management unit for managing energy, including:
- computer code for applying excess energy generation to charge the storage unit if a DG generation of power is more than the demand and an energy storage unit is not fully charged;
- and
- computer code for applying a secondary management scheme to a power shortage either by discharging the battery or by buying power from a grid or by actual load reduction if the DG generation is less than the load demand.
Dependencies are inferred from the claim text.