Outage Mgmt Sys

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Presented to:

NH House

Science, Technology and Energy Committee

June 9, 2009

Outage Management System(OMS)



Definitions / Acronyms• Outage Management System (OMS)

– A computer system used by operators of electric distributionsystems to assist in the restoration of power.

• Interactive Voice Response (IVR) – An interactive technology that allows a computer to detect voice

and keypad inputs.

• Advanced Metering Infrastructure (AMI) – The integration of advanced metering technology with

communication technology to allow two-way communicationbetween the utility and the customer meter.

• Supervisory Control And Data Acquisition (SCADA) – A communication system and computer/control system that

monitors and can control an electric power system.



Outage Management System (OMS)• A computer system that assists in the power

restoration process by:

– identifying the location of fuse(s) or breaker(s) that

operated to interrupt a circuit or portion of a circuit – translating customer call patterns into specific

“problem” locations requiring response by line crews.

– prioritizing restoration efforts and managing resourcesbased on defined criteria such as the size of outages,and the locations of critical facilities.

– providing accurate information on the extent ofoutages and number of customers affected.

– assisting with crew dispatching and tracking;management of crews assisting in restoration.



Managing Events without OMS

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OUTAGE

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IVR

Customer Service Representative

Storm Room

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Managing Events with OMSCUSTOMER CALL TO

REPORT ANOUTAGE

IVR

Customer Service Representative

SCADA AMI

SCADA picture property of efacec Advanced Control SystemsOMS picture property of Telvent Miner & Miner

OMS



OMS Localized Example

ReceiveCustomer Calls

Isolate AffectedCircuit

Model OutageExtent



OMS Wide-scale Example

View AllCustomer Meters

Receive OutageCalls

Model OutageExtent



OMS Information Flow

IVR

AMI GIS

Web

SCADA

OMS

AMIOutage Identification

2-Way communicationbetween customer

meter and AMI system

IVR

Process and manage

customer calls

Provide information tocustomers

Customer call backs

Disseminate Information

Internal and externalnotification on scale of

event and ETR.

Network ConnectivityModel

Mapping information

Landbase

SCADAOutage Identification

Instant notification ofbreaker and recloser

operation.



OMS Benefits• Manages the overwhelming complexity of a major event.

– OMS is most helpful when there are many scattered outages

• Vastly increases the speed of trouble analysis, allowing

managers to make better/faster decisions. – Quickly predicts the number of individual outage locations, the extent of

each outage and the scope of the restoration effort as a whole.

• Improves prioritization of outages and other priorities such ascritical facilities and life support customers.

• Provides better information to key stakeholders (customers,emergency officials, regulators, elected officials, media, etc.)about the extent of outages, customers affected, progress ofrestoration, and the estimated restoration time.



OMS Limitations• The OMS does not “manage” the utility’s restoration.

– It is not a substitute for the utility’s Emergency Restoration Plan (ERP).

• The OMS does not provide information about “damage”.

– An OMS only “knows” what it is told. i.e., the number and locations ofcustomers who have called, information from SCADA, etc.

• The OMS does not automatically know the status of the utility’sdistribution system.

– OMS is dependent on sources of information, such as customer calls.

• The OMS does not directly provide estimated restoration timesor other information that would be valuable to customers.

• An OMS can become overwhelmed in extreme situations, andmay not be able to deliver promised benefits in all scenarios.



Questions

Documents

Outage Mgmt Sys