Method and system for managing electric power

Patent metadata

Field	Value
Publication number	US-2016190808-A1
Application number	US-201414585052-A
Country	US
Kind code	A1
Filing date	Dec 29, 2014
Priority date	Dec 29, 2014
Publication date	Jun 30, 2016
Grant date	—

Abstract

An electric power management method of an electric power management device includes controlling a first power generator to operate according to a preset operating plan, calculating an available amount of stored power by subtracting a required amount of emergency power from an amount of electric power stored in an energy storage system when a power generation amount of the first power generator is less than an electric power use amount of a plurality of electric power use devices, controlling a second power to operate when a sum of the power generation amount of the first power generator and the amount of electrical power stored in the energy management system is less than the electric power use amount, and interrupting electric power of the electric power use devices in ascending order of priority.

First claim

What is claimed is:

1 . A method of managing power devices, the method comprising:
operating a first power generator according to a predetermined operating plan; determining an amount of available stored power by subtracting a required amount of emergency power from a total amount of power stored in an energy storage system (ESS) when an amount of generated power of the first power generator is less than an amount of power required by a plurality of power use devices; operating a second power generator when a first sum of an amount of generated power of the first power generator and the determined amount of available stored power is less than the required amount of power; and interrupting power provided to the at least one of the plurality of power use devices in ascending order of priority when a second sum of the amount of generated power of the first power generator and an amount of generated power of the second power generator is less than the required amount of power.

2 . The method of claim 1 , further comprising:
operating each of the first power generator, the second power generator, and a third power generator according to a corresponding determined power generation efficiency and determined power generation cost.

3 . The method of claim 2 , further comprising:
operating the third power generator when a third sum of the amount of generated power of the first power generator, the amount of generated power of the second power generator, and the determined amount of available stored power is less than the required amount of power.

4 . The method of claim 3 , further comprising:
stopping operation of the third power generator when the second sum is greater than the required amount of power.

5 . The method of claim 1 , further comprising:
predicting information related to at least weather, resource cost or power generation efficiency; and revising the operating plan for each of a plurality of time zones according to the predicted information.

6 . The method of claim 1 , further comprising:
setting priorities of the plurality of power use devices according to a corresponding degree of importance and a corresponding degree of risk of power supply interruption.

7 . The method of claim 1 , further comprising:
storing excess power in the ESS when the amount of generated power of the first power generator is greater than the required amount of power.

8 . The method of claim 1 , further comprising:
supplying power stored in the ESS when the first sum is greater than the required amount of power.

9 . The method of claim 1 , further comprising:
identifying power use devices to which power has been previously interrupted when the second sum is greater than the required amount of power; and releasing the interruption of power to at least one of the identified power use devices in descending order of priority.

10 . The method of claim 9 , further comprising:
stopping operation of the second power generator if no power use devices are identified to which power has been previously interrupted.

11 . A power management system comprising:
a plurality of power generators configured to generate power; an energy storage system (ESS) configured to store power; a plurality of power use devices configured to use power; an ESS control unit configured to determine an amount of available stored power by subtracting a required amount of emergency power from a total amount of power stored in the ESS; a power generator operation control unit configured to:
operate a first power generator according to a predetermined operating plan;
determine that an amount of generated power of the first power generator is less than an amount of power required by a plurality of power use devices; and
operate a second power generator when a first sum of an amount of generated power of the first power generator and the determined amount of available stored power is less than the required amount of power; and
an electric power interruption control unit configured to interrupt power provided to at least one of the plurality of power use devices in ascending order of priority when a second sum of the amount of generated power of the first power generator and amount of generated power of the second power generator is less than the required amount of power use.

12 . The system of claim 11 , wherein the power generator operation control unit is further configured to operate each of the first power generator, the second power generator, and a third power generator according to a corresponding determined power generation efficiency and determined power generation cost.

13 . The system of claim 12 , wherein the power generator operation control unit is further configured to operate the third power generator when a third sum of the amount of generated power of the first power generator, the amount of generated power of the second power generator, and the determined amount of available stored power is less than the required amount of power.

14 . The system of claim 13 , wherein the power generator operation control unit is further configured to stop operation of the third power generator when the second sum is greater than the required amount of power.

15 . The system of claim 11 , further comprising:
an operating plan unit configured to: predict information related to at least weather, resource cost or power generation efficiency; and revise the operating plan for each of a plurality of time zones according to the predicted information.

16 . The system of claim 11 , wherein the electric power interruption control unit is further configured to set priorities of the plurality of power use devices according to a corresponding degree of importance and a corresponding degree of risk of power supply interruption.

17 . The system of claim 11 , wherein the ESS control unit is further configured to store excess power in the ESS when the amount of generated power of the first power generator is greater than the required amount of power.

18 . The system of claim 11 , wherein the ESS control unit is further configured to supply power stored in the ESS when the first sum is greater than the required amount of power.

19 . The system of claim 11 , wherein the electric power interruption control unit is further configured to:
identify devices to which power has been previously interrupted when the second sum is greater than the required amount of power use amount; and release the interruption of power to at least one of the identified power use devices in descending order of priority.

20 . The system of claim 19 , wherein the power generator operation control unit is further configured to stop operation of the second power generator if no power use devices are identified to which power has been previously interrupted.

Assignees

• Lg Cns Co Ltd

Inventors

• Lee Jeong Hwan
• Park Gun Dong
• Lee Hyunah

Classifications

• H02J3/48

  Controlling the sharing of active power · CPC title

• H02J3/28

  Arrangements for balancing of the load in networks by storage of energy · CPC title

• H02J3/381 Primary

  Dispersed generators · CPC title

• H02J2101/28

  Wind energy · CPC title

• H02J2101/24

  Photovoltaics · CPC title