The document discusses outage management systems. It provides an overview of the key components of an outage management system, including becoming aware of outages, diagnosing and locating the problem, providing feedback to customers, dispatching repair crews, restoring power, and maintaining historical outage records. It also covers some of the issues utilities face with outage management systems, such as data requirements, the impact of deregulation, and the main players and suppliers involved in outage management.
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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
DefinitionsDefinitions
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Becoming aware of outagesBecoming 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
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Diagnosing & locatingDiagnosing & 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
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Feedback to affected customersFeedback 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
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Repair and restorationRepair 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
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Historical RecordsHistorical 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
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Drivers for current interest in OMSDrivers 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!
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Data requirementsData 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
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Impact of De-regulationImpact 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?
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Main Players in OMSMain Players in OMS
Customer
Customer service representative
Dispatcher
Trouble/repair crews
New trouble calls Outage management updates
Business Dept.
Operations Dept.
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OMS SuppliersOMS Suppliers
“Home-made” systems
Stand alone OMS
GIS vendors
SCADA vendors