Method for controlling the stability of an electric supply grid

• US 9,203,241 B2
• Filed: 05/13/2011
• Issued: 12/01/2015
• Est. Priority Date: 05/19/2010
• Status: Active Grant

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG
• Inventors: Krug, Florian
• Primary Examiner(s): BARNES-BULLOCK, CRYSTAL JOY
• Application Number:
  US13/698,677
• Publication Number:
  US 20130116845A1
• Time in Patent Office: 1,663 Days
• Field of Search: 700/286, 700/291, 700295-297, 701/2, 701/22, 701 23- 26, 701/29.1, 701/29.3, 701/29.4, 701/31.4, 701/31.5, 701/32.3, 701/32.4, 701/33.4, 702/57, 702 60- 63, 705/63, 705/412, 180/65.1, 307/9.1, 307/10.1, 307/43, 307/69, 307/80, 340/636.1, 340988-994
• US Class Current: 1/1
• CPC Class Codes: H02J 2300/10 The dispersed energy generation being of fossil origin, e.g. diesel generators
• CPC Class Codes: H02J 2300/20 The dispersed energy generation being of renewable origin
• 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 2300/40 wherein a plurality of decentralised, dispersed or local energy generation technologies are operated simultaneously
• CPC Class Codes: H02J 3/241 The oscillation concerning frequency
• CPC Class Codes: H02J 3/381 Dispersed generators
• CPC Class Codes: H02J 3/46 Controlling of the sharing of output between the generators, converters, or transformers
• CPC Class Codes: Y02B 70/3225 Demand response systems, e.g. load shedding, peak shaving
• 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: Y04S 20/222 Demand response systems, e.g. load shedding, peak shaving

Abstract

A method for controlling the stability of an electric supply grid is provided. A first device, designed to exchange electrical energy with the supply grid, locates a part of the supply grid, with which the first device is associated for an energy connection, by a geographic location of the first device. The first device determines parameters for an intended energy exchange. At least one second device associated with the part of the supply grid for energy exchange also determines parameters for an intended energy exchange. The first device performs the energy exchange considering the parameters of the first and the second device such that an electric stability of the part of the supply grid is ensured.

Claims

1. A method for controlling the stability of an electric supply grid, comprising:

locating a supply grid by a first device via a geographical location of the first device, wherein the first device is embodied to exchange electrical energy with the supply grid,

determining, by the first device, first parameters for an energy exchange with the supply grid,

determining, by a separate second device associated with the supply grid, second parameters for an energy exchange with the supply grid, and

exchanging electrical energy between the first device and the supply grid based upon the first and second parameters such that an electrical stability of the supply grid is ensured,

wherein the first and/or second parameters are selected from the group consisting of an intended power exchange with the first and/or second device, a frequency in the supply grid, an output available in the supply grid, an expected change of the power output and the frequency in the supply grid in the case of the energy exchange, and a combination thereof.

2. The method as claimed in claim 1, wherein an end consumer, as the first device and/or as the second device, determines the first and/or second parameters for the energy exchange.

3. The method as claimed in claim 2, wherein the end consumer is an electrically-powered car.

4. The method as claimed in claim 1, wherein the second device is a power plant component.

5. The method as claimed in claim 1, wherein the first device exchanges the first and/or second parameters with the second device and/or with the supply grid by way of a connected power supply line.

6. The method as claimed in claim 1, wherein the first device performs the energy exchange by taking additional parameters of a network node point of the supply grid into consideration in order to ensure the electrical stability of the supply grid.

7. The method as claimed in claim 1, wherein an administrative function evaluates the stability of the supply grid based upon the first and second parameters of the first and second devices.

8. The method as claimed in claim 1, wherein a local control of at least one parameter of the supply grid is implemented using the first and second parameters.

9. The method as claimed in claim 1, wherein electrical energy is fed into the supply grid by way of connected power plants, wherein nuclear power plants, hydroelectric power plants, steam power plants and/or power plants with a temporally predictable energy output are used as power plants.

10. The method as claimed in claim 1, wherein electrical energy is fed into the supply grid by way of connected solar power plants and/or wind power plants.

11. The method as claimed in claim 1, wherein the location of the first and/or second device and/or the supply grid is determined with a connection cable which is provided for the energy exchange with the supply grid.

12. The method as claimed in claim 1, wherein the location of the first and/or second device and/or the supply grid is determined with a GPS or with a DGPRS or with a GPS-based system.