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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
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
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
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
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
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