Outage Management System (OMS) Presented to: NH House Science, - PowerPoint PPT Presentation

Outage Management System (OMS) Presented to: NH House Science, Technology and Energy Committee June 9, 2009

Definitions / Acronyms • Outage Management System (OMS) – A computer system used by operators of electric distribution systems 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 communication between 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 resources based on defined criteria such as the size of outages, and the locations of critical facilities. – providing accurate information on the extent of outages and number of customers affected. – assisting with crew dispatching and tracking; management of crews assisting in restoration.

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Managing Events with OMS SCADA AMI CUSTOMER CALL TO REPORT AN OUTAGE IVR OMS Customer Service Representative SCADA picture property of efacec Advanced Control Systems OMS picture property of Telvent Miner & Miner

OMS Localized Example Isolate Affected Circuit Receive Model Outage Customer Calls Extent

OMS Wide-scale Example Receive Outage Calls View All Model Outage Customer Meters Extent

OMS Information Flow SCADA Outage Identification Instant notification of breaker and recloser operation. SCADA IVR Process and manage customer calls Disseminate Information IVR Web Provide information to Internal and external customers notification on scale of event and ETR. OMS Customer call backs AMI AMI GIS Outage Identification Network Connectivity 2-Way communication Model between customer meter and AMI system Mapping information Landbase

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 as critical 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 of restoration, 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 of customers who have called, information from SCADA, etc. • The OMS does not automatically know the status of the utility’s distribution system. – OMS is dependent on sources of information, such as customer calls. • The OMS does not directly provide estimated restoration times or other information that would be valuable to customers. • An OMS can become overwhelmed in extreme situations, and may not be able to deliver promised benefits in all scenarios.

Questions