eGENS

enhanced Grid Event Notification System

The electric power industry is rapidly adopting synchrophasor technology. Phasor Measurement Units (PMUs) provide high-resolution and time-synchronized data typically at 25 or 50 frames/second for 50 Hz systems and 30 or 60 frames/second for 60 Hz systems. This high resolution and time synchronized data provides unprecedented intelligence on power system dynamics that cannot be obtained from the traditional SCADA/EMS system. This intelligence is used in eGENS for:

• Event Detection - line trips, generation trips, load trips and other events
• Oscillation Detection and Source Location
• Generator Model Validation
• Dynamic Events linked to phase angle separations and other dynamic metrics

When major grid events occur, information needs to be available to operators, engineers and managers in and outside control room. During major events, gathering event information could take several hours and operators do not have time for information dissemination.

The eGENS platform (enhanced Grid Event Notification System) addresses this need by providing an automated notification which alerts authorized subscribers via email and mobile devices when events occur and provides key event intelligence including location, timing and severity with map-based visualization. eGENS specifically addresses utility needs for grid event source localization using data from PMUs, DFRs and other IEDs.

eGENS Platform Leverages Synchrophasor Data to Provide Timely Event Intelligence and Notifications

eGENS platform is flexible and scalable. It is designed to address industry needs for timely event information on:
• Oscillation events and oscillation source location
• Oscillation events and oscillation source location
• Frequency events including line trips, load drops, generator trips
• Automated Generator Model Validation when events are detected
• Dynamic Events via WAMS integration for all available alarms

eGENS is capable to send notifications in near real-time to the users and complements control room WAMS.Some key features are:
• Platform for automated event driven notifications
• Easy to interpret information using maps and graphic displays
• Information at your fingertips – emails, mobile device notifications
• Easy installation with minimal IT infrastructure requirements
• Help in compliance fulfillment such as NERC MOD-26/27 and NERC IRO-002-6 WECC Regional Variance
• Notifications

Use Case: Oscillation Source Location (OSL)

eGENS is designed for oscillation detection, source location and provides notifications, reports and alarms in near-real time to provide the relevant event information:

• Early detection of oscillation events due to root causes
• Pinpoint the oscillation source to a generating plant/unit
• Area-wise identification of source location
• Help in identifying event root cause
• Event severity in terms of oscillation energy and affected areas
• Provide oscillation frequency
• List of locations with highest oscillation energies
• Plots of key metrics relevant to the event
• Helps in complying with NERC IRO-002-6 WECC Regional Variance

Use Case: Frequency Events

eGENS is designed for frequency event detection, location and provides notifications, reports and alarms in near-real time to provide the most relevant event information:

• Event detection
• Event location on geographical map with heat maps/contours
• Event date and time
• Affected area(s)
• Plot of key metrics relevant to event
• Automated recording of event for archiving and further analysis

Use Case: Automated Generator Model Validation

eGENS includes capability to validate generator models and provide validation reports in near real-time to provide the most relevant event information:

• Automated system to perform model validation after significant events
• Validates multiple events
• Validates multiple generators
• Automated report generation and email
• Compliance with NERC MOD-26, 27
• Identifies good vs questionable model parameters (programmatically not visually)

Use Case: Dynamic Events

eGENS is also designed to integrate with EPG’s RTDMS WAMS software that is used in major control centers. An adaptor integrates all the dynamic event alarms that are available in RTDMS WAMS systems such as phase angles, oscillation detecting and damping, voltage stability index and notifies engineers and operators, including those who are not in the control room to stay abreast of events as they occur.

Architecture and Data Flow

eGENS application can receive the synchrophasor data from any device which supports IEEE C37.118 format such as PMUs, Phasor Data Concentrators (PDCs), DFR devices etc. eGENS application has four subsystems:

Server: A Windows Service to subscribe sub-second data from the substation devices, perform calculations for the 4 eGENS modules - oscillation source localization, frequency event detection, dynamic events and generator model validation, and provide data sink interfaces for the results and alarms.
Web App: A web application hosted by Microsoft Internet Information Service (IIS) to configure eGENS Server and monitor the results and alarms.
Event Notification: Event Notification subsystem sends a real time notification and report to the subscribed list upon detection of an event.
Alarm Processor: The application is capable to send alarms locally to the substation or to a central control room. The Alarm Processor is compatible with industry standard communication protocols such as ICCP, DNP3 and IEC 104.

eGENS also has a feature of archiving the event data for detailed engineering analysis.

Download the eGENS brochure

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