Adaptive topology assisted protection and control of electric power delivery systems

• US 9,257,833 B2
• Filed: 03/26/2014
• Issued: 02/09/2016
• Est. Priority Date: 03/28/2013
• Status: Active Grant

• Current Assignee: Schweitzer Engineering Laboratories, Incorporated
• Original Assignee: Schweitzer Engineering Laboratories, Incorporated
• Inventors: Allen, William F., Haes, Dennis, Fazzari, Bryan J.
• Primary Examiner(s): PATEL, DHARTI HARIDAS
• Application Number:
  US14/225,796
• Publication Number:
  US 20140293494A1
• Time in Patent Office: 685 Days
• Field of Search: 361/93.1
• US Class Current: 1/1
• CPC Class Codes: H02H 1/0061 concerning transmission of signals transmission of measured quantities or switching orders; sectionalised protection involving signal transmission between at least two stations H02H7/261; comparison of the voltage or current values at two spaced portions of a single system H02H3/28; transferring the output of a sensing member to another variable G01D5/00; electrical measuring arrangements using modulation of electromagnetic waves, e.g. light beams G01R15/24, G01R15/26
• CPC Class Codes: H02H 1/0092 concerning the data processing means, e.g. expert systems, neural networks
• CPC Class Codes: H02H 7/20 for electronic equipment for converters H02H7/10; for electric measuring instruments G01R1/36; for dc voltage or current semiconductor regulators G05F1/569; for amplifiers H03F1/52; for electronic switching circuits H03K17/08
• CPC Class Codes: H02H 7/261 involving signal transmission between at least two stations transmission of signals in general H02H1/0061
• CPC Class Codes: H02J 13/00002 characterised by monitoring
• CPC Class Codes: H02J 13/00016 using a wired telecommunication network or a data transmission bus
• CPC Class Codes: H02J 13/00034 the elements or equipment being or involving an electric power substation
• CPC Class Codes: H02J 13/0004 involved in a protection system
• CPC Class Codes: Y02E 60/00 Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
• CPC Class Codes: Y04S 10/18 using switches, relays or circuit breakers, e.g. intelligent electronic devices [IED]
• CPC Class Codes: Y04S 10/20 using protection elements, arrangements or systems
• CPC Class Codes: Y04S 10/30 State monitoring, e.g. fault, temperature monitoring, insulator monitoring, corona discharge
• CPC Class Codes: Y04S 40/124 using wired telecommunication networks or data transmission busses

Abstract

Disclosed are adaptive communication assisted protection and control. Local intelligent electronic devices (IEDs) associated with local switching devices and having unique IDs may transmit switch status and unique IDs to an area IED. The area IED may calculate topology using switch status, and provide control information to local IEDs using the topology. The area IED may communicate the unique ID of the local IED calculated to be immediately upstream of each local IED and, upon detection of a fault, the local IEDs may send blocking signals that include the received unique ID of the IED immediately upstream therefrom. The area IED may communicate control commands that include the unique IDs and control commands for the local IEDs to take the control action. Upon matching of the unique ID in the control command with its own unique ID, the local IEDs may take the control action and transmit remaining actions.

Claims

1. A system for control of electric power delivery, comprising:

a plurality of switching devices for opening and closing at various locations on en electric power delivery system;

a plurality of local intelligent electronic devices (IEDs), each local IED of the plurality of local IEDs;

in communication with one of the plurality of switching devices;

comprising a unique ID;

in communication with the electric power delivery system for obtaining electric power information therefrom; and

comprising a communication module for sending power system information and receiving command information;

an area IED comprising;

a topology module for maintaining and updating a topology of the electric power delivery system;

a communication module for receiving electric power system information from the local IEDs and transmitting to each local IED the unique ID of the local IED immediately upstream of the local IED; and

,

a communication network in communication with the communication modules of the area IED and each of the local IEDs;

wherein upon detection of a fault, each local IED that detected the fault transmits a blocking message that includes the unique ID of the IED immediately upstream therefrom; and

,

wherein each local IED blocks opening of its associated switching device upon receipt of a blocking message that includes its unique ID.

2. The system of claim 1, wherein each local IED does not block opening of its associated switching device upon receipt of no blocking messages including its unique ID.

3. The system of claim 1, wherein the communication network comprises:

a control-class communication network for communication of the unique ID information; and

,

a protection-class communication network for communication of protection information.

4. The system of claim 3, wherein the control-class communication network and the protection-class communication network comprise the same physical network.

5. The system of claim 3, wherein the control-class communication network comprises a Supervisory Control and Data Acquisition (SCADA) network.

6. The system of claim 1, wherein the unique ID of each of the local IEDs comprise unique IDs of the switching devices associated with the local IEDs.

7. The system of claim 1, wherein the unique ID of each of the local IEDs comprise a MAC address of each of the local IEDs.

8. The system of claim 1, wherein the topology module of the area IED is configured to update the topology using electric power system information from the local IEDs.

9. The system of claim 1, wherein upon update of the topology, the area IED is configured to communicate to each local IED an updated unique ID of the local IED immediately upstream of the particular local IED.

10. The system of claim 3, wherein the area IED is configured to transmit to each local IED the unique ID of the local IED immediately upstream of the local IED using the control-class communication network.

11. A system for control of electric power delivery, comprising:

a plurality of switching devices for opening and closing at various locations on en electric power delivery system;

a plurality of local intelligent electronic devices (IEDs), each local IED of the plurality of local IEDs;

in communication with one of the plurality of switching devices;

comprising a unique ID;

in communication with the electric power delivery system for obtaining electric power information therefrom; and

comprising a communication module for sending and receiving electric power system information and protection information;

an area IED comprising;

a topology module for maintaining and updating a topology of the electric power delivery system;

a control module for calculating control actions that include open and close commands for specific switches; and

,

a communication module for receiving electric power system information from the local IEDs and transmitting the calculated control actions to the local IEDs; and

,

a communication network in communication with the communication modules of the area IED and each of the local IEDs;

wherein upon calculation of a control action, the area IED is configured to transmit a command comprising;

the unique ID of a first local IED;

a command for the first local IED to open or close its associated switching device;

a unique ID of a second local IED; and

a command for the second local IED to open or close its associated switching device; and

wherein the first local IED, upon receipt of the command from the area IED and matching of its unique ID with the unique ID of the first local IED in the command, the local IED is configured to;

open or close its associated switching device; and

transmit a command comprising;

the unique ID of the second local IED; and

the command for the second local IED to open or close its associated switching device.

12. The system of claim 11, wherein upon receipt of the command from the first local IED and matching of its unique ID with the unique ID of the second local IED in the command, the second IED is configured to open or close its associated switching device.

13. The system of claim 11, wherein the communication network comprises:

a control-class communication network for communication of the unique ID information; and

,

a protection-class communication network for communication of protection information.

14. The system of claim 13, wherein the control-class communication network and the protection-class communication network comprise the same physical network.

15. The system of claim 13, wherein the control-class communication network comprises a Supervisory Control and Data Acquisition (SCADA) network.

16. The system of claim 13, wherein the command from the area IED is communicated using the control-class communication network.

17. The system of claim 11, wherein the control module comprises detection of an overload condition, and calculation of which switches to open and which switches to close to ameliorate the overload condition.

18. The system of claim 11, wherein the control module comprises load transfer calculations.

19. The system of claim 11, wherein the control module comprises one selected from the group consisting of:

direct transfer trip calculations;

direct underreaching transfer trip calculations;

permissive overreaching transfer trip calculations;

permissive underreaching transfer trip calculations;

directional comparison blocking calculations;

directional comparison unblocking calculations; and

combinations thereof.

20. A method for protecting an electric power delivery system, comprising:

each local intelligent electronic device (IED) of a plurality of local IEDs obtaining local electric power system information from the electric power delivery system;

each local IED obtaining switch status information from associated switching device of a plurality of switching devices;

each local IED transmitting switch status information and local IED unique ID information to an area IED;

the area IED calculating a topology of the electric power system using the switch status information from the local IEDs;

the area IED calculating for each local IED the unique ID of the local IED immediately upstream of the local IED using the topology;

the area IED transmitting to each local IED the unique ID of the local IED calculated to be immediately upstream of the local IED;

upon detection of a fault using the obtained local electric power system information, each local IED transmitting a command that includes the unique ID of the local IED immediately upstream of the local IED, as was received from the area IED;

upon receipt of a command, each local IED comparing its own unique ID with the unique ID in the command and when the unique IDs match, the local IED performing the command.

21. The method of claim 20, wherein the area IED transmits the unique ID of the local IED calculated to be immediately upstream of the local IED using a control-class communication network.

22. The method of claim 20, wherein each local IED transmits the blocking command using a protection-class communication network.

23. The method of claim 20, wherein the command comprises a blocking command, and when the unique ID and the unique ID in the blocking command match, the local IED blocking the tripping of its associated switching device.

24. A method for protecting an electric power delivery system, comprising:

each local intelligent electronic device (IED) of a plurality of local IEDs obtaining local electric power system information from the electric power delivery system;

each local IED obtaining switch status information from associated switching device of a plurality of switching devices;

each local IED transmitting switch status information, local IED unique ID information, and electric power system information to an area IED;

the area IED calculating a topology of the electric power system using the switch status information from the local IEDs;

the area IED calculating control actions using the calculated topology and the received electric power system information;

the area IED transmitting a command comprising;

the unique ID of a first local IED;

a command for the first local IED;

a unique ID of a second local IED; and

a command for the second local IED;

the first local IED receiving the command from the area IED;

the first local IED performing the command for the first local IED;

the first local IED transmitting a command comprising;

the unique ID of the second local IED; and

a command for the second local IED;

the second local IED receiving the command from the first local IED;

the second IED performing the command for the second local IED.

25. The method of claim 24, wherein the area IED transmits the command using a control-class communication network.

26. The method of claim 24, wherein the control actions comprise overload protection transferring load from a first power source to a second power source.

27. The method of claim 24, wherein the step of calculating control actions further comprises calculating a margin using a rated capacity and a current load from the electric power system information transmitted from the local IEDs.

28. The method of claim 24, wherein the command for the first local IED comprises opening or closing a switching device.

29. The method of claim 24, wherein the command for the first local IED comprises one selected from the group consisting of:

trip blocking, open switching device, close switching device, transformer tap up, transformer tap down, block transformer tap, connect capacitor bank, disconnect capacitor bank, modify generator setpoints, modify storage setpoints, block reclosing, unblocking reclosing, enable sensitive settings, disable sensitive settings, change setting groups, adjust voltage setpoints, adjust power factor setpoints, curtail distributed generation, release distributed generation, and combinations thereof.