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American Electric Power 4.3 Distribution Grid Management
Document ID: Use case #
3.3
Title: Circuit Reconfiguration Use Case
Subject Matter Expert: Author: Reviewed by: Ron Cunningham Brian D. Green Ron Cunningham
Copyright © 2011 American Electric Power Company
Circuit Reconfiguration
Version History Rev. Date Author Change description
A 9/22/2011 Brian D. Green Initial Release B 10/21/2011 Ron Cunningham Final team review
"Acknowledgment: This material is based upon work supported by the Department of Energy under Award Number DE-OE0000193."
Disclaimer: "This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information,
apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or
service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. The views and opinions of authors expressed herein do not necessarily
state or reflect those of the United States Government or any agency thereof."
American Electric Power 4.3 Distribution Grid Management
Document ID: Use case #
3.3
Title: Circuit Reconfiguration Use Case
Subject Matter Expert: Author: Reviewed by: Ron Cunningham Brian D. Green Ron Cunningham
Page 2 of 12 Copyright © 2011 American Electric Power Company Rev. 2
Summary:
This use case describes how the system will use the circuit reconfiguration controller (CRC) to handle faults and restoration automatically.
Narrative:
In the use case, a fault occurs on the distribution system and the Fault Clearing Device clears the fault. The Fault Clearing Device sends the lock out signal to the Circuit Reconfiguration Controller (CRC). The CRC sends the lock out information to the Distribution SCADA (D-SCADA)/DMS, the Outage Management System (OMS), and Distribution Historian. The CRC sends an abnormal control area configuration status to any applicable Volt-Var Controller. By polling the various devices, the CRC is able to perform a fault isolation calculation to isolate the fault. The CRC then sends a device command to the Isolation Device which acknowledges the command and performs the functions needed to isolate the fault. These events are monitored in the D-SCADA through regular polling of the devices. The CRC eventually calculates the reconfiguration scenario and sends the commands to the Reconfiguration Device which acknowledges the commands. After the Reconfiguration Device functions, it sends an update to the CRC which sends all equipment status updates to D-SCADA which updates the Distribution Historian.
American Electric Power 4.3 Distribution Grid Management
Document ID: Use case #
3.3
Title: Circuit Reconfiguration Use Case
Subject Matter Expert: Author: Reviewed by: Ron Cunningham Brian D. Green Ron Cunningham
Page 3 of 12 Copyright © 2011 American Electric Power Company Rev. 2
Interface Diagram:
Operations
Field
Fault Clearing Device
OMS
Distribution Historian
11
D-SCADA (DMS)
Substation
Distribution RTU
Isolation Device
Reconfiguration Device
Circuit Breaker
Transmission RTU
Substation
Circuit Breaker
TransmissionRTU
60
61
80
64
64
82
82
70
72
73
Volt-VAR Controller 71
Circuit Reconfiguration
Controller63
Volt-VAR Controller
69
Note(s):
Fault Clearing Device includes: Reclosers, Circuit Breakers, Interrupting Switches
Isolation Device includes: Circuit Breakers, Reclosers, Switches
Reconfiguration Device includes: Reclosers, Switches, Circuit Breakers
CRC Feeder Device includes: Reclosers, Circuit Breakers, Interrupting Switches, Switches
Circuit Reconfiguration Controller: Some vendor implementations have the CRC logic and application bundled with the RTU.
American Electric Power 4.3 Distribution Grid Management
Document ID: Use case #
3.3
Title: Circuit Reconfiguration Use Case
Subject Matter Expert: Author: Reviewed by: Ron Cunningham Brian D. Green Ron Cunningham
Page 4 of 12 Copyright © 2011 American Electric Power Company Rev. 2
Typical Circuit Layout for this Use Case:
Circuit Breaker 1
Circuit Breaker 2
Fault Clear Device 1
N.C.
Fault Clear Device 2
N.C. 1) opens on fault
Isolate Device 1
N.C.2) opens to Isolate
Reconfig Device 2
N.C.
CRC Device A
N.C.
CRC Device C N.O.
3) closes to Reconfig
CRC Device B
N.C.
Reconfig Device 3
N.C. Fault
Actor(s):
The list of the actors and the roles that are participating in this use case described in the table below.
Name Role description
CRC Circuit Reconfiguration control logic and application
Distribution Historian Distribution Historian
D-SCADA / (DMS) Distribution SCADA is a component of the Distribution Management System (DMS)
Fault Clearing Device Recloser, Circuit Breaker, Interrupting Switch
Isolation Device Circuit Breaker, Recloser, Switch,
OMS Outage Management System
Reconfiguration Device Recloser, Switch, Circuit Breaker
Distribution RTU (D-RTU), provides communication acces to in-scope Distribution Devices and Actors
Transmission RTU (T-RTU), provides communication access to Circuit Breaker
Volt VAR Controller Controller for Volt VAR operation
American Electric Power 4.3 Distribution Grid Management
Document ID: Use case #
3.3
Title: Circuit Reconfiguration Use Case
Subject Matter Expert: Author: Reviewed by: Ron Cunningham Brian D. Green Ron Cunningham
Page 5 of 12 Copyright © 2011 American Electric Power Company Rev. 2
Participating Business Functions:
The participating business function, its acronym and what they provide in this use case are detailed in the table below.
Acronym Business Function/Abstract Component Services or Information Provided
CRC Circuit Reconfiguration Controller, controls fault isolation and circuit reconfiguration for the substation circuits
Circuit Reconfiguration control logic and application, initiating operational commands for fault isolation and reconfiguration devices
VVC Volt-VAR Controller, controls Volt VAR operations for the field equipment
Controls Volt VAR operations by initiating operational commands for field devices
Assumptions / Design Considerations:
• Standard International Electrotechnical Commission (IEC) 61968 Message Definition format will be followed to provide the Header, Request, Reply, and payload used when defining the messages for the design specifications. For the purpose of the use cases identified in this document these have been omitted as they are to be provided in the design specification for the Circuit Reconfiguration use case.
• It is understood that the Isolation Device includes circuit breakers, reclosers, and/or switches.
• It is understood that the Reconfiguration Device includes reclosers, switches, and/or circuit breakers.
• It is understood that the Fault Clearing Device includes: reclosers, interrupting switches, and/or circuit breakers
• T-RTU will provide the CRC with control to and status of the station circuit breakers.
• The CRC sends control area configuration status to any applicable Volt-Var Controller.
American Electric Power 4.3 Distribution Grid Management
Document ID: Use case #
3.3
Title: Circuit Reconfiguration Use Case
Subject Matter Expert: Author: Reviewed by: Ron Cunningham Brian D. Green Ron Cunningham
Page 6 of 12 Copyright © 2011 American Electric Power Company Rev. 2
Normal Sequence:
The sequences of events, showing the order in which they ocurr during the typical progression of this use case are provided in the table below. The Sequence Diagram that graphically depicts the events is presented immediately following the table.
Use Case Step
Triggering Event
Description Of Process Information To Be Exchanged
Producer Receiver Message Type
1.A Protective devices clears fault
Fault Clearing Device sends Lock Out Signal to the D-RTU
Lock Out Signal
Fault Clearing Device
D-RTU DNP3
1.B1 Circuit sends Lock Out Signal to the D-RTU via T-RTU
Lock Out Signal
Circuit Breaker
T-RTU DNP3
1.B2 T-RTU sends Lock Out Signal to the D-RTU
Lock Out Signal
T-RTU D-RTU DNP3
2 D-RTU sends Lock Out Signal to the CRC
Lock Out Signal
D-RTU CRC DNP3
3 The D-RTU sends the Lock Out Signal to the D-SCADA
Lock Out Signal
D-RTU D-SCADA
DNP3
4 The D-SCADA sends the Lock Out Signal to the OMS
Lock Out Signal
D-SCADA
OMS Proprietary
5 The D-SCADA sends the Lock Out Signal to the Distribution Historian
Lock Out Signal
D-SCADA
Distribution Historian
Proprietary
6 Lock Out signal received by CRC
CRC sends an abnormal control area configuration state to Volt-VAR Controller via D-RTU
Abnormal Control Area Configuration
CRC D-RTU DNP3
7 D-RTU sends an abnormal control area configuration state to Volt-VAR Controller
Abnormal Control Area Configuration
D-RTU Volt-VAR Controller
DNP3
8 CRC polls applicable Feeder Devices for status from D-RTU
Poll of Feeder Devices
CRC D-RTU DNP3
American Electric Power 4.3 Distribution Grid Management
Document ID: Use case #
3.3
Title: Circuit Reconfiguration Use Case
Subject Matter Expert: Author: Reviewed by: Ron Cunningham Brian D. Green Ron Cunningham
Page 7 of 12 Copyright © 2011 American Electric Power Company Rev. 2
Use Case Step
Triggering Event
Description Of Process Information To Be Exchanged
Producer Receiver Message Type
9.A D-RTU sends pool request for System Monitoring Data to Isolation Devices
Poll of Feeder Devices
D-RTU Isolation Device
DNP3
9.B1 D-RTU sends pool request for System Monitoring Data to Circuit Breaker via T-RTU
Poll of Feeder Devices
D-RTU T-RTU DNP3
9.B2 T-RTU sends pool request for System Monitoring Data to Circuit Breaker
Poll of Feeder Devices
T-RTU Circuit Breaker
DNP3
10.A Receipt of Poll Request from CRC
Isolation Device sends System Monitoring Data to CRC via D-RTU
System Monitoring Data
Isolation Device
D-RTU DNP3
10.B1
Receipt of Poll Request from CRC
Circuit Breaker sends System Monitoring Data l to the D-RTU via T-RTU
System Monitoring Data
Circuit Breaker
T-RTU DNP3
10.B2
T-RTU sends System Monitoring Data to the D-RTU
System Monitoring Data
T-RTU D-RTU DNP3
11 D-RTU sends specified Feeder Device System Monitoring Data to the CRC
System Monitoring Data
D-RTU CRC DNP3
12 Receipt of Specified Feeder Device System Monitoring Data
CRC performs a Fault Isolation Calculation to isolate the fault using Feeder Device System Monitoring Data
Fault Isolation Calculation
CRC Internal proprietary
13 CRC sends Device Commands to the appropriate Isolation Devices via D-RTU
Device Commands
CRC D-RTU DNP3
14 D-RTU sends Device Commands to the appropriate Isolation Devices
Device Commands
D-RTU Isolation Device
DNP3
American Electric Power 4.3 Distribution Grid Management
Document ID: Use case #
3.3
Title: Circuit Reconfiguration Use Case
Subject Matter Expert: Author: Reviewed by: Ron Cunningham Brian D. Green Ron Cunningham
Page 8 of 12 Copyright © 2011 American Electric Power Company Rev. 2
Use Case Step
Triggering Event
Description Of Process Information To Be Exchanged
Producer Receiver Message Type
15 Receipt of CRC Isolation command
Isolation Device functions according to the Device Command
Device Commands
Isolation Device
Internal Proprietary
16 Isolation Devices sends Device System Monitoring Data to CRC via D-RTU
System Monitoring Data
Isolation Device
D-RTU DNP3
17 D-RTU sends Feeder Device System Monitoring Data to the CRC
System Monitoring Data
D-RTU CRC DNP3
18 D-RTU sends Status Updates to D-SCADA
Status Updates D-RTU D-SCADA
DNP3
19 D-SCADA sends Equipment Status Updates to the OMS
Equipment Status Updates
D-SCADA
OMS Proprietary
20 D-SCADA sends Equipment Status Updates to the Distribution Historian
Equipment Status Updates
D-SCADA
Distribution Historian
Proprietary
21 Receipt of Feeder Device System Monitoring Data after Fault Isolation Operation
CRC calculates Optimal Circuit(s) Reconfiguration Scenario
Optimal Circuit(s) Reconfiguration Scenario
CRC Internal Proprietary
22 CRC send Device Commands to Reconfiguration Devices via D-RTU
Device Commands
CRC D-RTU DNP3
23 D-RTU sends Device Commands to the appropriate Reconfiguration Devices
Device Commands
D-RTU Reconfiguration Device
DNP3
American Electric Power 4.3 Distribution Grid Management
Document ID: Use case #
3.3
Title: Circuit Reconfiguration Use Case
Subject Matter Expert: Author: Reviewed by: Ron Cunningham Brian D. Green Ron Cunningham
Page 9 of 12 Copyright © 2011 American Electric Power Company Rev. 2
Use Case Step
Triggering Event
Description Of Process Information To Be Exchanged
Producer Receiver Message Type
24 Receipt of CRC Reconfiguration command
Reconfiguration Device functions according to the Device Command
Device Commands
Reconfiguration Device
Internal Proprietary
25 Reconfiguration Devices sends Device Status Updates to CRC via D-RTU
Status Updates Reconfiguration Device
D-RTU DNP3
26 D-RTU sends Feeder Device Device Status Updates to the CRC
Status Updates D-RTU CRC DNP3
27 D-RTU sends Status Updates to D-SCADA
Status Updates D-RTU D-SCADA
DNP3
28 D-SCADA sends Equipment Status Updates to the OMS
Equipment Status Updates
D-SCADA
OMS Proprietary
29 D-SCADA sends Equipment Status Updates to the Distribution Historian
Equipment Status Updates
D-SCADA
Distribution Historian
Proprietary
American Electric Power 4.3 Distribution Grid Management
Document ID: Use case #
3.3
Title: Circuit Reconfiguration Use Case
Subject Matter Expert: Author: Reviewed by: Ron Cunningham Brian D. Green Ron Cunningham
Page 10 of 12 Copyright © 2011 American Electric Power Company Rev. 2
American Electric Power 4.3 Distribution Grid Management
Document ID: Use case #
3.3
Title: Circuit Reconfiguration Use Case
Subject Matter Expert: Author: Reviewed by: Ron Cunningham Brian D. Green Ron Cunningham
Page 11 of 12 Copyright © 2011 American Electric Power Company Rev. 2
Integration Scenarios: None
The following are the points of integration that must be tested for this use case. Other non-CIM message interfaces may be testable in this use case.
Actor Interface Points
Circuit Conconfiguration Controller
• D-SCADA • Recloser • Circuit Breaker • Interrupting Switch • Switch
OMS • Distribution Historian • D-SCADA
Pre-conditions: None
Post-conditions: None
Exceptions / Alternate Sequences: None
There are no exceptions, unusual events or alternate sequences defined for this use case.
Use Case Step
Triggering Event
Description Of Process Information To Be Exchanged
Producer Receiver Message Type
Message Type(s) Diagram: None
An XML Schema Definition (XSD) diagram shows the normative and informative parts of the message. Not all of the International Electrotechnical Commission’s (IEC) – CIM message optional elements must or will be used in the use of IEC – CIM for this specific use case.
American Electric Power 4.3 Distribution Grid Management
Document ID: Use case #
3.3
Title: Circuit Reconfiguration Use Case
Subject Matter Expert: Author: Reviewed by: Ron Cunningham Brian D. Green Ron Cunningham
Page 12 of 12 Copyright © 2011 American Electric Power Company Rev. 2
References:
Use Cases or other documentation referenced by this use case include:
• 20100625 AEP Ohio Interoperability Plan V1.docx: Section 4.3.4 (Circuit Re-Configuration)
• 20100625 Use Cases EPRI Report_V2.4.docx: Section 3.3 (Circuit Reconfiguration)
Issues: None
ID Description Status
Miscellaneous Notes: None