METHOD FOR PROVIDING CONTROL POWER FOR A POWER NETWORK

• US 20140309801A1
• Filed: 10/29/2012
• Published: 10/16/2014
• Est. Priority Date: 11/10/2011
• Status: Abandoned Application

• Current Assignee: Steag Power Saar GmbH (KSBG Kommunale Beteiligungsgesellschaft GmbH & Company KG), Evonik Degussa GmbH (Rag-Stiftung)
• Original Assignee: Steag Power Saar GmbH (KSBG Kommunale Beteiligungsgesellschaft GmbH & Company KG), Evonik Degussa GmbH (Rag-Stiftung), Evonik Industries AG (Rag-Stiftung)
• Inventors: Markowz, Georg, Schweissthal, Wolfgang, Kolligs, Carsten, Flemming, Anna, Gamrad, Dennis, Cochet, Sebastien, Deis, Wolfgang, Igel, Michael, Winternheimer, Stefan
• Application Number:
  US14/357,273
• Publication Number:
  US 20140309801A1
• Time in Patent Office: Days
• US Class Current: 700/295
• CPC Class Codes: H02J 3/241 The oscillation concerning frequency
• CPC Class Codes: H02J 3/32 using batteries with converting means
• CPC Class Codes: H02J 7/00711 with introduction of pulses during the charging process
• CPC Class Codes: Y02B 70/3225 Demand response systems, e.g. load shedding, peak shaving
• CPC Class Codes: Y04S 20/222 Demand response systems, e.g. load shedding, peak shaving

Abstract

Method for the provision of control power for a power supply network, wherein the level of the control power provided is determined depending on a deviation of the actual alternating current frequency from a nominal alternating current frequency of the power supply network, wherein the control power is provided in a pulsed manner in order to increase the efficiency, wherein the control energy provided in a specific time period from the pulsed operation corresponds to the control energy to be provided in the same time period in the case of a continuous operation of a control power source.

Claims

1. :

A method for supplying control power for a power supply network, wherein a level of the control power is determined depending on a deviation of an actual alternating current frequency from a nominal alternating current frequency of the power supply network, the

method comprising supplying control power in a pulsed manner in order to increase efficiency, wherein the control energy supplied in a specific time period from pulsed operation corresponds to the control energy in the same time period in the case of a continuous operation of a control power source.

2. :

The method according to claim 1, wherein

a duty cycle according to DIN IEC 60469-1 is from greater than zero to 1,

at least temporarily no control power and, alternately or deferred, pulses are supplied with a control power level in a range from 2% to 35% of a rated power of a control power source,

or both.

3. :

The method according to claim 1, wherein, for a reduction in harmonics or the like,

the control power is supplied with a rising or falling edge preceding or following a pulse,

the control power is supplied with a pulse with a graduated pulse height, so that only a proportion of the control power supplied throughout a duration of a pulse at the beginning and/or at the end of the pulse, and/or

a power gradient within a range from 1 to 1000 kW per second in terms of amount is not exceeded.

4. :

The method according to claim 1, wherein at least one selected from the group consisting of a frequency and number of the pulses, a duty cycle of the pulses, a height of the pulses and a shape of the pulses is set for the supplying of the required control power depending on an inertia of the power supply network, and/or local transmission characteristics of a power supply network, or both.

5. :

The method according to claim 1, wherein the control power is supplied depending on efficiency of an energy producer, an energy store, an energy consumer, an inverter, inertia of the power supply network, local transmission characteristics of a power supply network, further components of a device for the provision of control power, or any combination thereof.

6. :

The method according to claim 1, wherein, for a determination of the required control power, an actual alternating current frequency of the power supply network is measured and, in an event of a deviation from a nominal alternating current frequency or a deviation over a frequency band/dead band around a nominal alternating current frequency, control power is fed into the power supply network or is drawn from the power supply network and/or, in the event of a return of the actual alternating current frequency to the nominal alternating current frequency or into the frequency band, the control power is reduced.

7. :

The method according to claim 1, wherein the control power is supplied with at least one selected from the group consisting of an energy store, an energy producer and an energy consumer.

8. :

The method according to claim 1, wherein an energy store is supplied in the form of at least one selected from the group consisting of a flywheel, a hydrogen producer and store with a fuel cell, a hydrogen gas turbine, a hydrogen-powered engine, a natural gas producer with a gas-fired power station, a pumped storage power station, a compressed air storage power station, a superconducting magnetic energy store, a redox flow element and a galvanic element.

9. :

The method according to claim 8, wherein the energy producer, the energy consumer, or both has or have a rated power of at least 5 kW.

10. :

The method according to claim 1, wherein the control power is supplied in a pulsed manner in a first power provision range from 0% of the rated power up to 80% of the rated power of a control power source, and the control power is supplied continuously in a second power provision range, with a higher control power which is to be supplied.

11. :

The method according to claim 1, wherein at least two energy stores, energy producers energy consumers, or any combination thereof, are jointly operated for supplying control power, wherein the control power is supplied at least up to a defined proportion of the rated power of the entire pool, alternately by an energy store, an energy store and an energy producer or an energy store and an energy consumer, while the further energy stores, energy producers and/or energy consumers provide no control power.

12. :

A device for carrying out the method according to claim 1, comprising a control or regulation and an inverter, wherein, the energy producer, the energy store, the energy consumer, or any combination thereof, can be operatively connected to the power supply network by means of the inverter, and

the control controls the supplying of the control power, wherein a pulsed feed or removal of energy into or from the energy store, the energy producer, the energy consumer, or any combination thereof, can be controlled or regulated.

13. :

The device according to claim 12, wherein the device comprises a measuring means for measuring the actual alternating current frequency of the power supply network and a store, and the control or regulation compares a nominal network frequency stored in the memory, with the measured actual alternating current frequency and regulates the supplying of the control power on the basis of this comparison.

14. :

The method according to claim 2, wherein

a duty cycle according to DIN IEC 60469-1 is from greater than zero to 1.

15. :

The method according to claim 2, wherein at least temporarily no control power and, alternately or deferred, pulses are supplied with a control power level in a range from 2% to 35% of the rated power of a control power source.

16. :

The method according to claim 2, wherein

a duty cycle according to DIN IEC 60469-1 is from greater than zero to 1, and

at least temporarily no control power and, alternately or deferred, pulses are supplied with a control power level in a range from 2% to 35% of the rated power of a control power source.

17. :

The method according to claim 2, wherein

the duty cycle according to DIN IEC 60469-1 is from 0.05 to 0.9, and

at least temporarily no control power and, alternately or deferred, pulses are supplied with a control power level in a range from 5% to 25% of the rated power of a control power source.

18. :

The method according to claim 3, wherein, for a reduction in harmonics or the like,

the control power is supplied with a rising or falling edge preceding or following a pulse, in an edge with a duration of 1 to 3 seconds,

the control power is supplied with a pulse with a multiply graduated, pulse height, so that only a proportion of the control power is supplied throughout the duration of a pulse at the beginning and/or at the end of the pulse, and

a power gradient within a range from 2 to 500 kW per second, in terms of amount is not exceeded.

19. :

The method according to claim 10, wherein the control power is supplied in a pulsed manner in a first power provision range from 0% of the rated power up to 50% of the rated power of a control power source.

20. :

The method according to claim 10, wherein the control power is supplied in a pulsed manner in a first power provision range from 0% of the rated power up to 35% of the rated power of a control power source.