Outage Management

1
Outage Management

• Roy Hoffman
• 29 Jan 2001

2
Outline

• Outage Management Basics
• Some issues
• Standards for Distribution Management

3
Definitions

• A system of computer-based tools and utility
  procedures to efficiently effectively -
• become aware of,
• diagnose locate,
• provide feedback to affected customers
• dispatch trouble/repair crews,
• restore
• maintain historical records of
• compute statistical indices on
• electrical outages

4
Becoming aware of outages

• Customer telephone calls
• conventional human communication
• automatic voice response systems (CTI)
• Auto outage detection/reporting systems
• SCADA detection of breaker trip/lockout
• Ideal Become aware of outages before the first
  customer calls in

5
Diagnosing locating

• Grouping of customer trouble calls
• reverse tracing of electric topology
• determine a common protective device suspected to
  be open
• transformer?
• lateral fuse?
• recloser?
• substation breaker?
• Take into account automatic feeder switching
• Compute extent of suspected outage
• Number of customers affected
• Highest priority of affected customers
• Confirm or modify (split/enlarge) based on
  feedback from crews

6
Feedback to affected customers

• Timely, accurate feedback is almost as important
  as fixing the problem
• Telling customer you are aware of his problem
• Current status of outage response
• Expected time of restoration

7
Crew Dispatch Management

• Computer-aided modeling of crews
• capabilities, tools, equipment
• real-time location tracking
• work load

8
Repair and restoration

• Simple problems
• direct repair restore
• Major outages
• isolate fault restore un-faulted portions of
  feeder
• OMS tracks partial restorations
• Automated Fault Detection, Isolation, Restoration
  schemes with feeder automation are considered
  desirable outside N. America

9
Historical Records

• Keep track of all outages
• root cause, number of customers, duration
• Provides the data for
• Performance statistics SAIDI, SAIFI, CAIFI, etc
• Planning / budgeting maintenance activities
• Condition based maintenance

10
Outline

• Outage Management Basics
• Some issues
• Standards for Distribution Management

11
Drivers for current interest in OMS

• Customer expectations of reliability
• Momentary outages are also important
• The plague of electronic clocks!
• Performance-based rates
• More likely a penalty for poor performance than a
  reward for good performance!

12
Data requirements

• Distribution Network Model
• getting an accurate electronic network model is
  generally a mammoth under-taking
• Keeping it up-to-date with construction
• Real-time representation of switch positions
• Customer data
• Customer - premise occupancy (business data)
• critical customers
• outage history
• Premise connectivity to Network model (operations
  data)
• Timely, reliable feedback to affected customers
  during an outage

13
Impact of De-regulation

• Separation of
• energy provider
• energy delivery (poles wires)
• Ancillary services (eg meter reading)
• Increased interest in performance-based rates
• Issues
• Who does the customer call?
• Proprietary data issues?

14
Main Players in OMS
Business Dept.

• Customer
• Customer service representative
• Dispatcher
• Trouble/repair crews

New trouble calls
Outage management updates
Operations Dept.
15
OMS Suppliers

• Home-made systems
• Stand alone OMS
• GIS vendors
• SCADA vendors

16
Outline

• Outage Management Basics
• Some issues
• Standards for Distribution Management

17
IEC TC57 WG14System Interfaces For Distribution
Management

• Liaison Report
• Contact Greg Robinson, Xtensible Solutions,
• For Further Information
• E-mail g.m.robinson_at_worldnet.att.net

18
IEC 61968 Interface
Dist Wires Model
Trans Wires Model
DAC
VRU
Information Exchange Model
Outage Management
Distribution Automation
Planning
EMS
CIS
Interface Adapter
Interface Adapter
Interface Adapter
...
IEC 61968 Compliant Middleware Services
Event History
Human Resources
Maint. Analysis Diagnostic Tools
Work Management
GIS
Financial
19
Revised IEC TC57 WG14Interface Reference Model
Goal Reduce Integration Effort By Incrementally
Building A Common Language Among The Many
Applications Used By Utilities
Information http//support.ces.com/wg14
20
The Next Level Of The Revised IRM
21
WG14 Teams

• Editor Team
• Architecture General Requirements (61968-1)
• Glossary Team (61968-2)
• Vertical Teams (61968-3-10)
• Part 3 Team Network Operations
• Part 4 Team Records Asset Management
• Part 6 Team Maintenance Construction Just
  Formed
• Modeling Team (61968-11)
• Supports Vertical Teams With Consistent Model
  Necessary To Define Information Exchange
• Rather Than Inventing Everything, Extensions Are
  Being Harmonized (WG13, CCAPI, WG10/11/12, OAG)

22
Discussion Conclusion