Installation for producing electrical energy provided with means of energy storage and control method of such an installation

• US 9,006,927 B2
• Filed: 11/16/2012
• Issued: 04/14/2015
• Est. Priority Date: 11/18/2011
• Status: Active Grant

• Current Assignee: GE Infrastructure Technology, LLC (GE Vernova, Inc.)
• Original Assignee: General Electric Company
• Inventors: Pena, Ezio, Biellmann, Herve, Buquet, Maxime, Chevalier, Frederic, Chillar, Rahul Jaikaran, Guyot, Julien, Vignolo, Jean-louis, Ingremeau, Jean Marc
• Primary Examiner(s): Waks, Joseph
• Application Number:
  US14/114,996
• Publication Number:
  US 20140244056A1
• Time in Patent Office: 879 Days
• Field of Search: 307/43, 290/4.R
• US Class Current: 307/43
• CPC Class Codes: F02C 1/00 Gas-turbine plants characterised by the use of hot gases or unheated pressurised gases, as the working fluid by the use of combustion products F02C3/00, F02C5/00
• CPC Class Codes: F02C 6/14 Gas-turbine plants having means for storing energy, e.g. for meeting peak loads
• CPC Class Codes: G05F 1/10 Regulating voltage or current G05F1/02 takes precedence; for electric railways B60M3/02
• CPC Class Codes: H02J 3/30 using dynamo-electric machines coupled to flywheels
• CPC Class Codes: H02J 9/066 characterised by the use of dynamo-electric machines H02J9/08 takes precedence
• CPC Class Codes: Y02B 10/70 Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
• 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: Y02E 60/16 Mechanical energy storage, e.g. flywheels or pressurised fluids
• CPC Class Codes: Y02T 50/60 Efficient propulsion technologies, e.g. for aircraft
• CPC Class Codes: Y04S 20/20 End-user application control systems

Abstract

An installation for producing electrical energy and a control method of such an installation are described. The installation includes an energy storage. The installation includes an electrical energy generator that connects to a distribution network and the energy storage. The installation also includes a controller controlling the operation of the energy storage and the connection of the energy storage to the electrical energy generator and the network. The controller receives a set of information from the network or, energy storage, and the electrical energy generator, and from the network manager to control the supply of the electrical energy generator and a set of auxiliary equipment of the installation from the energy storage in the event of power failure.

Claims

1. An installation for producing electrical energy, comprising:

means for generating electrical energy, said means including one of a type gas turbine, steam turbine, combined, coupled to an alternator, or renewable energy sources, said means being connected to a distribution network;

energy storage means for storing kinetic energy and the electrical energy;

means for generating electrical power;

a controller configured to control operation of the energy storage means and to control a connection of the energy storage means to said network and a connection of said means for generating electrical energy to said network, the controller controlling the energy storage means to provide active or reactive power to said network and to auxiliary systems of the installation based on a set of information received, respectively, from the network manager, the energy storage means, said means for generating electrical energy and the system operator.

2. The installation according to claim 1, wherein the controller controls the level of primary reserve available in the installation from the energy available in the energy storage means.

3. The installation according to claim 1, wherein the controller controls a supply of electrical energy from the energy storage means in response to a request from the network manager.

4. The installation according to claim 1, wherein the controller regulates the frequency of the network based on the network operator and on energy available in the energy storage means.

5. The installation according to claim 1, wherein the controller controls a supply of electrical energy to the auxiliary systems of the plant from the energy storage means in case of a fall in voltage for a predetermined length of time.

6. The installation according claim 1, wherein the means of generating electrical energy comprises a generator coupled to a gas turbine or steam turbine, the controller controlling recharging of the energy storage means, and stopping the means for generating electrical energy using inertia of a shaft of the means for generating electrical energy.

7. The installation according to claim 1, wherein the controller controls a level of the active power or provides a reactive network from energy available in the energy storage means.

8. The installation according to claim 1, wherein the energy storage means comprises a set of at least a flywheel coupled to a motor and generator or a set of batteries.

9. The installation according to claim 8, further comprising a set of auxiliary power sources of electrical energy connected to their associated power electronics and configured to maintain rotation of the flywheel.

10. The installation according to claim 9, wherein the auxiliary power sources are batteries or renewable type energy.

11. The installation according to claim 10, wherein the energy storage means comprises power electronic devices for regulating the current, voltage and frequency passing through the energy storage means.

12. The method according to claim 9, wherein the energy supplied to the network by the energy storage means is a difference between energy demand of a distribution network manager and energy supplied by the means for generating electrical energy, limited by the inertia of the gas turbine and steam turbine.

13. A method of controlling an installation for power generation comprising means for generating electrical energy intended to be connected to a distribution network and energy storage means for storing electrical energy and a controller controlling the operation of energy storage means and a connection of the energy storage means and said means for generating electrical energy to said distribution network, the method comprising:

controlling the energy storage means to provide active or reactive power to the network and to the installation of auxiliary systems based on a set of information from the distribution network, the energy storage means, and the means for generating electrical energy, and

controlling the energy storage means to provide different functions sequentially, ensuring optimal state of charge between two functions.

14. The method of claim 13, further comprising regulating a level of primary power reserve available in the installation from the energy available in the energy storage means.

15. The method according to claim 13, further comprising regulating frequency of the distribution network at the request of a transmission distribution system based on energy available in the energy storage means.

16. The method according to claim 13, wherein the means of generating electrical energy comprises an alternator coupled to a gas or steam turbine to load the energy storage means, inertia of a shaft of the means for generating electrical energy is used to stop the means for generating electrical energy.

17. A method according to claim 13, wherein the energy storage means starts the system, thereby limiting calls to groups of generators after disconnection of the distribution network.

18. A method according to claim 13, wherein the energy storage means supports stopping of the means for generating electric energy in feeding auxiliary systems.

19. The method of claim 13, wherein the controller detects or receives information about voltage drop of the distribution network and provides electrical energy to auxiliary systems of the plant from the energy storage means.

20. The method of claim 19, further comprising maintaining the distribution network voltage and supplying auxiliary systems of the installation with electrical energy from the energy storage means in case of a drop in distribution network voltage for a predetermined length of time.

21. The method according to claim 13, further comprising regulating a level of the active power or providing a reactive network from energy available in the energy storage means.