Use of demand response to enable improved power supply restoration planning

• US 9,553,455 B2
• Filed: 07/02/2013
• Issued: 01/24/2017
• Est. Priority Date: 10/11/2012
• Status: Active Grant

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG
• Inventors: Horsfield, Peter
• Primary Examiner(s): Fennema, Robert
• Assistant Examiner(s): STEVENS, THOMAS H
• Application Number:
  US13/933,176
• Publication Number:
  US 20140107852A1
• Time in Patent Office: 1,302 Days
• Field of Search: 702/58, 700/295
• US Class Current: 1/1
• CPC Class Codes: H02J 13/00024 by means of mobile telephony
• CPC Class Codes: H02J 13/00026 involving a local wireless network, e.g. Wi-Fi, ZigBee or Bluetooth
• CPC Class Codes: H02J 13/00028 involving the use of Internet protocols
• CPC Class Codes: H02J 13/00034 the elements or equipment being or involving an electric power substation
• CPC Class Codes: H02J 2203/20 Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
• CPC Class Codes: H02J 2310/60 Limiting power consumption in the network or in one section of the network, e.g. load shedding or peak shaving
• CPC Class Codes: H02J 3/001 Methods to deal with contingencies, e.g. abnormalities, faults or failures
• CPC Class Codes: H02J 3/0073 for providing alternative feeding paths between load and source when the main path fails, e.g. transformers, busbars
• CPC Class Codes: H02J 3/06 Controlling transfer of power between connected networks; Controlling sharing of load between connected networks
• CPC Class Codes: H02J 3/144 Demand-response operation of the power transmission or distribution network
• CPC Class Codes: H02J 4/00 Circuit arrangements for mains or distribution networks not specified as ac or dc
• CPC Class Codes: Y02B 70/3225 Demand response systems, e.g. load shedding, peak shaving
• CPC Class Codes: Y02E 60/00 Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
• 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
• CPC Class Codes: Y04S 40/20 Information technology specific aspects, e.g. CAD, simulation, modelling, system security

Abstract

A utility network powered by a power source has a plurality of substations enabled to power electrical equipment in a participant site. At least one substation is disconnected from the utility network and is to be reconnected via a substation with a power constraint. A processor determines how much power should be shed in a participant site of the substation with the power constraint to allow reconnection of the substation that is disconnected. The processor initiates a Demand Response signal to power consuming equipment in the participant site of the substation with the power constraint to shed power. After shedding power based on the Demand Response signal, the substation that was disconnected is connected to the utility network by closing a switch.

Claims

1. A method for controlling a utility network with a power source applying power via a feeder for a substation, which supplies power to a first participant site connected to the substation and is enabled to supply power to a disconnected substation that supplies a second participant site when a switch is closed, the switch being connected to the disconnected substation, comprising:

determining, by a processor, an amount of power required to be delivered to the disconnected substation when the switch is closed;

the processor determining a power capacity constraint of the substation;

the processor determining an amount of power being fed to the first participant site prior to closing the switch;

the processor determining a reduced amount of power for the first participant site to meet the power capacity constraint of the substation when the switch is closed;

the processor providing a Demand Response signal to a metered power consumer in the first participant site to contribute to reducing power consumption to meet the reduced amount of power; and

the processor providing an instruction to close the switch remotely responsive to the Demand Response signal causing the metered power consumer in the first participant site to contribute to reducing the power consumption to meet the reduced amount of power and changing a status of the disconnected station to being connected.

2. The method of claim 1, wherein the utility network has at least 50 sub stations.

3. The method of claim 1, wherein a consumer in the first participant site has opted in to shed power based on a Demand Response event.

4. The method of claim 1, further comprising:

the processor applying a planning program to determine a viable route to connect the disconnected substation to the power source.

5. The method of claim 1, wherein at least two connected substations, each supporting at least one Participant Site, are in a restoring route of the disconnected sub station.

6. The method of claim 5, wherein Participant Sites of the at least two substations have to shed power based on a Demand Response event to enable changing the status of the disconnected substation.

7. The method of claim 1, further comprising:

determining by the processor that the second participant site includes one or more devices that are enabled to be switched off based on a Demand Response signal;

the processor selectively connecting the second participant site to the substation; and

the processor shedding at least one device in the one or more devices in the second participant site based on the Demand Response signal.

8. The method of claim 1, wherein a number of devices that is switched off by the Demand Response signal depends on a severity of an outage.

9. The method of claim 1, further comprising:

the processor determining a power capacity constraint of the feeder and the substation; and

the processor determining a reduced amount of power for the first participant site to meet the power capacity constraint of the feeder and substation when the switch is closed.

10. The method of claim 1, further comprising a communication network enabled to report a status of equipment in the utility network to a server.

11. A system to control a utility network with a power source applying power to a substation, which supplies power to a first participant site connected to the substation and is enabled to supply power to a disconnected substation that feeds a second participant site when a switch is closed, the switch being connected to the disconnected substation, comprising:

a memory enabled to store data and instructions;

a processor enabled to retrieve instructions from the memory and to execute the instructions to perform the steps;

determining a status of the utility network;

determining an amount of power required to be delivered to the disconnected substation when the switch is closed;

determining a power capacity constraint of the substation;

determining an amount of power being fed to the first participant site prior to closing the switch;

determining a reduced amount of power for the first participant site to meet the power capacity constraint of the substation when the switch is closed;

providing a Demand Response signal to a metered power consumer in the first participant site to contribute to reducing power consumption to meet the reduced amount of power; and

providing an instruction to close the switch remotely responsive to the Demand Response signal causing the metered power consumer in the first participant site to contribute to reducing the power consumption to meet the reduced amount of power and changing a status of the disconnected station to being connected.

12. The system of claim 11, wherein the utility network has at least 50 sub stations.

13. The system of claim 11, wherein a consumer in the first participant site has opted in to shed power based on a Demand Response event.

14. The system of claim 11, further comprising:

the processor applying a planning program to determine a viable route to connect the disconnected substation to the power source.

15. The system of claim 11, wherein at least two connected substations, each supporting at least one Participant Site, are in a restoring route of the disconnected sub station.

16. The system of claim 15, wherein Participant Sites of the at least two substations have to shed power based on a Demand Response event to enable changing the status of the disconnected substation.

17. The system of claim 11, the processor further enabled to perform the steps:

determining that the second participant site includes one or more devices that are enabled to be switched off based on a Demand Response signal;

selectively connecting the second participant site to the substation; and

shedding at least one device in the one or more devices in the second participant site based on the Demand Response signal.

18. The system of claim 11, wherein a number of devices that is switched off by the Demand Response signal depends on a severity of an outage.

19. The system of claim 11, wherein at least two substations in the utility network were disconnected and are reconnected.

20. The system of claim 11, further comprising a communication network enabled to report a status of equipment in the utility network to a server.