Control system of energy storage cluster and method for distributing energy using the same

• US 9,413,193 B2
• Filed: 11/09/2012
• Issued: 08/09/2016
• Est. Priority Date: 12/15/2011
• Status: Active Grant

• Current Assignee: KT Corporation
• Original Assignee: KT Corporation
• Inventors: Park, Jung-Bae, Kim, Min-Gyung
• Primary Examiner(s): Masinick, Michael D
• Application Number:
  US13/673,343
• Publication Number:
  US 20130158727A1
• Time in Patent Office: 1,369 Days
• Field of Search: 700/286
• US Class Current: 1/1
• CPC Class Codes: H02J 13/00002 characterised by monitoring
• CPC Class Codes: H02J 13/00022 using wireless data transmission
• CPC Class Codes: H02J 2300/24 of photovoltaic origin
• CPC Class Codes: H02J 2300/28 The renewable source being wind energy wind motors F03D
• CPC Class Codes: H02J 3/381 Dispersed generators
• CPC Class Codes: H02J 7/0013 acting upon several batteries simultaneously or sequentially H02J7/1423 takes precedence
• CPC Class Codes: H02J 7/34 Parallel operation in networks using both storage and other dc sources, e.g. providing buffering H02J7/14 takes precedence
• CPC Class Codes: Y02B 10/10 Photovoltaic [PV]
• CPC Class Codes: Y02B 70/30 Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
• CPC Class Codes: Y02B 70/3225 Demand response systems, e.g. load shedding, peak shaving
• CPC Class Codes: Y02B 90/20 Smart grids as enabling technology in buildings sector smart grids supporting the management or operation of end-user stationary applications in general, or like technologies with no associated climate change mitigation effect Y04S20/00
• CPC Class Codes: Y02E 10/56 Power conversion systems, e.g. maximum power point trackers
• CPC Class Codes: Y02E 10/76 Power conversion electric or electronic aspects
• CPC Class Codes: Y02E 40/70 Smart grids as climate change mitigation technology in the energy generation sector
• CPC Class Codes: Y02E 60/00 Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
• CPC Class Codes: Y04S 10/123 the energy generation units being or involving renewable energy sources
• CPC Class Codes: Y04S 10/30 State monitoring, e.g. fault, temperature monitoring, insulator monitoring, corona discharge
• CPC Class Codes: Y04S 20/221 General power management systems
• CPC Class Codes: Y04S 20/222 Demand response systems, e.g. load shedding, peak shaving
• CPC Class Codes: Y04S 40/126 using wireless data transmission

Abstract

Provided a cluster control system which controls energy storage systems (ESSs) within the cluster and a method for distributing energy among the ESSs in the cluster. The control system includes: ESSs which are provided in a consumption facility or a building and which supply power to respective loads in the facility or building; and a cluster control server distributing energy between the ESSs in the cluster based on an energy level with respect to stored energy amounts of the ESSs. Energy in a cluster in which a plurality of distributed ESSs are grouped is efficiently distributed to a predetermined zone partitioned by the cluster such that the cluster may mange the energy independent of supply of the energy from an external power system.

Claims

1. A control system of an energy storage cluster, the system comprising:

a plurality of energy storage systems (ESSs) which supply power to a plurality of respective loads;

a cluster control server which distributes energy between the ESSs based on individual energy levels stored in the ESSs with respect to energy required by the plurality of respective loads,

wherein the cluster control server comprises a load management device which acquires energy consumption amount information with respect to the plurality of respective loads and analyzes an energy consumption pattern using the acquired energy consumption amount information in order to compute real time energy consumption amount information and expected energy consumption amount information with respect to the plurality of loads, and

wherein the cluster control server further comprises;

an ESS management device which computes current stored energy amount in each of the ESSs and which controls charging and discharging based on the computed current stored energy amounts; and

an energy supply management device which determines redundant stored energy and insufficient amounts of energy for each of the ESSs based on the acquired energy consumption amount of a respective load associated with each respective ESS and an energy level of said each respective ESS obtained based on the computed current stored energy amount for said each respective ESS to distribute energy between the ESSs,

wherein the ESS management device is configured to compute the current stored energy amount in each respective ESS based on weather and temperature information that corresponds to a zone in which the respective ESS is located.

2. The control system of claim 1, wherein the energy supply management device comprises:

a cluster energy storing manager which determines an energy level based on the computed stored energy amount information of said each respective ESS obtained by communicating with the ESS management device;

a cluster energy consumption manager which determines a redundant energy supply amount or an insufficient energy supply amount of said each respective ESS based on energy consumption amount information obtained by communicating with the load management device; and

a cluster energy distributing manager which determines an energy supply difference of the ESSs based on information provided by the cluster energy storing manager and by the cluster energy consumption manager, and which manages a distribution of energy stored in said each respective ESS based on the determined energy supply difference of ESSs.

3. The control system of claim 1, wherein the ESS management device comprises:

a State of Charge (SOC) manager which acquires SOC information of said each respective ESS in real time or periodically, and which integrates the acquired SOC information to compute a current stored energy amount of said each respective ESS; and

a charging/discharging manager which controls charging and discharging with respect to said each respective ESS based on the current stored energy amount information obtained from the SOC manager.

4. The control system of claim 1, further comprising:

a plurality of clusters divided by zones and each having a corresponding set of loads and a corresponding set of ESSs; and

a central control server which acquires energy supply information of the plurality of clusters and which distributes energy of a cluster storing a redundant energy supply amount with respect to a first respective load to a cluster in which energy supplied to a second respective load is insufficient by communicating with respective cluster servers.

5. The control system of claim 4, wherein the central control server comprises:

a central energy storing manager which manages stored energy amount information of each cluster;

a central energy consumption manager which manages energy consumption amount of the cluster; and

a central energy distribution manager which manages energy distribution between the clusters based on information from the central energy storing manager and the central energy consumption manager.

6. The control system of claim 4, wherein the central controller communicates with respective cluster controllers to distribute energy among respective clusters.

7. The control system of claim 1, wherein a respective load which consumes energy and a corresponding ESS which supplies power is associated with a respective facility or a building.

8. The control system of claim 7, wherein the facility or the building is associated with at least one additional load which consumes energy.

9. The control system of claim 1, wherein the ESS stores power produced by a power generation equipment which generates power using a renewable power source comprising at least one of solar light, wind power, and tidal power.

10. The control system of claim 1, wherein the ESS stores power from an external power source during a time period when energy consumption is low or when costs of power are low.

11. The control system of claim 1, wherein the ESSs use an installed grid of an external power system or a grid separately formed to connect the ESSs with each other.

12. The control system of claim 1, wherein the cluster control server controls an ESS with a redundant energy amount to supply the redundant energy amount to one of adjacent ESSs and if the one adjacent ESS has a sufficient energy amount, the one adjacent ESS supplies a portion of the sufficient energy amount to one of adjacent ESS until an ESS with insufficient energy amount receives the portion of the sufficient energy amount.