Integration of primary protection relays for electric power delivery systems

Patent metadata

Field	Value
Publication number	US-11050234-B2
Application number	US-202016831128-A
Country	US
Kind code	B2
Filing date	Mar 26, 2020
Priority date	Aug 21, 2019
Publication date	Jun 29, 2021
Grant date	Jun 29, 2021

Abstract

Systems and methods for facilitating selected communications among primary protection relays using a supervisory system with a configurable input/output (IO) map. Primary protection relays may obtain signals from equipment associated with an electric power delivery system and provide primary protection without need for communication. The primary protection relays may communicate a unique identifier as well as signal values, states, and commands to the supervisory system. The supervisory system may route specifically identified communications among primary protection relays in accordance with a configurable IO map by transmitting selected portions of the communications on a port associated with the receiving primary protection relay. The primary protection relays may perform secondary protection and other operations using the communicated information.

First claim

What is claimed is:

1. A system to integrate communications among primary protection relays in an electric power delivery system, comprising:
a first primary protection relay and a second primary protection relay of the primary protection relays to provide primary protection to the electric power delivery system, each of the first primary protection relay and the second primary protection relay comprising:
a monitored equipment interface to receive an electric power delivery system signal value and to transmit a protective action to a piece of monitored equipment;
a protection subsystem to receive the electric power delivery system signal value from the monitored equipment interface and to implement the protective action when the value is outside of a predetermined operating parameter; and
a communication subsystem to communicate the electric power delivery system signal value and the protective action;

a supervisory system in communication with each of the protection relays, comprising:
a communication switch subsystem comprising a first communication port in communication with the first primary protection relay and a second communication port in communication with the second primary protection relay; and
an input/output (IO) map to route one of the electric power delivery system signal value or the protective action from the first primary protection relay to the second primary protection relay through the communication switch subsystem, the second primary protection relay to implement the protective action in response to receipt of the one of the electric power delivery system signal value or the protective action from the first primary protection relay, the input/output (IO) map to selectively and automatically route the one of the electric power delivery system signal value or the protective action from the first primary protection relay to one or more additional protection relays of the primary protection relays.

2. The system of claim 1 , wherein the electric power delivery system signal value comprises a state of the piece of monitored equipment and the protection subsystem is to implement the protective action when the state is outside of a predetermined operating parameter.

3. The system of claim 1 , wherein the communications switch subsystem is further to selectively transmit and receive communications from each of the first primary protection relay and the second primary protection relay.

4. The system of claim 1 , wherein the IO map comprises a plurality of associations between the first primary protection relay and the second primary protection relay.

5. The system of claim 1 , wherein the IO map comprises a plurality of associations of input communications and a plurality of targets of the input communications, the plurality of targets comprising a plurality of primary protection relays in the electric power delivery system.

6. The system of claim 1 , wherein the first protection relay and the second primary protection relay each comprise at least one of a transformer relay, a bus relay, a feeder relay, a line relay, a motor relay, or a generator relay.

7. The system of claim 1 , wherein the IO map is configurable to define a communication pathway between the first primary protection relay and the second primary protection relay.

8. The system of claim 7 , wherein the IO map comprises an identification of an input communication, an identification of the first primary protection relay associated with the input communication, and an identification of the second primary protection relay to which the input communication is to be transmitted.

9. The system of claim 1 , wherein the first primary protection relay is to generate a first unique identifier and the second primary protection relay is to generate a second unique identifier, and wherein the supervisory system is to associate the first unique identifier with the first primary protection relay and associate the second unique identifier with the second primary protection relay.

10. The system of claim 9 , wherein the IO map comprises associations between an input communication, the unique identifier of the first primary protection relay, and the unique identifier of second primary protection relay.

11. A supervisory system to facilitate selected communication among a first primary protection relay and a second primary protection relay in an electric power delivery system, comprising:
a communication subsystem in communication with the first primary protection relay and the second primary protection relay, each of the first primary protection relay and the second primary protection relay to perform primary protection operations for monitored equipment in the electric power delivery system and to receive one or more signals from the primary protection relays including:
at least one unique identifier of each of the first primary protection relay and the second primary protection relay; and
at least one electric power delivery system signal value of monitored equipment in the electric power delivery system;

a communications switch subsystem to transmit the at least one electric power delivery system signal value from the first primary protection relay to the second primary protection relay based on a preselected input/output (IO) map to route the at least one electric power delivery system signal value from the first primary protection relay to the second primary protection relay, the second primary protection relay implement a action in response to the at least one electric power delivery system signal value from the first primary protection relay.

12. The system of claim 11 , wherein the IO map comprises a plurality of associations of input communications and a plurality of targets of the input communications, the plurality of targets comprising a plurality of primary protection relays in the electric power delivery system.

13. The system of claim 12 , wherein the first primary protection relay is to generate a first unique identifier and the second primary protection relay is generate a second unique identifier, and wherein the supervisory system is to associate the first unique identifier with the first primary protection relay and associate the second unique identifier with the second primary protection relay.

14. A method of managing communications between protection relays of an electric power delivery system, the method comprising:
receiving, using a monitored equipment interface of a first primary protection relay, an electric power delivery system signal value;
implementing, using a protection subsystem of the first primary protection relay, a protective action when the value is outside of a predetermined operating parameter;
transmitting, using a communication subsystem of the first primary protection relay, the electric power delivery system signal value or the protective action to a supervisory system, using a communication subsystem of the supervisory system;
receiving, using a communication switch subsystem of a supervisory system, the electric power delivery system signal value or the protective action;
routing, using an input/output (IO) map of the supervisory system, one of the electric power delivery system signal value or the protective action from the first primary protection relay to a second primary protection relay using the communication switch subsystem;
receiving, from the communication switch subsystem, the one of the electric power delivery system signal value or the protective action from the first primary protection relay at the second primary protection relay; and
implementing, using a protection subsystem of the second primary protectio

Assignees

• Schweitzer Engineering Lab Inc

Inventors

• Schweitzer Iii Edmund O
• Whitehead David E
• Gubba Ravikumar Krishnanjan
• Wade Austin Edward

Classifications

• H02J13/36

  specially adapted for protection systems · CPC title

• H02J13/13

  characterised by the transmission of data to equipment in the power network · CPC title

• H02J3/18

  Arrangements for adjusting, eliminating or compensating reactive power in networks · CPC title

• H02H7/261 Primary

  involving signal transmission between at least two stations (transmission of signals in general H02H1/0061) · CPC title

• H02H1/0061 Primary

  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 title