ERCOT Odessa Disturbance Events IEEE PI2 March Tech Meeting


IEEE PI2 Austin, March 28th, 2023, Tech Meeting via WebEx and In-Person 6 PM Central / 7 PM Eastern at Lupe Tortilla off MoPac.

  • New Location:    Lupe Tortilla, 10515 N MoPac Expy, Austin, Texas

    Dinner (Fajitas) and soft beverages will be provided for those with reservations. If you do not have a reservation you will not be able to eat.

    Cost, to defray the room, dinner and refreshments cost. Thank you in advance:

    • All Attendees: In-person Choices:
      • $25.00 Paypal from your card when registering  - you do not need a Paypal account to use it. Click through to the credit/debit page.
      • $25.00 credit/debit with Square at the meeting. Please resister in advance (skip the payment)
      • $30.00 cash at the meeting
    • On-Line- $5.00 Paypal (you don’t need to have an account to pay)
    • IEEE Student Members  - free (must register in advance with your IEEE member number)

The WebEx information will be emailed to you the day of the event. Contact if you have any questions or do not receive the WebEx details.

For PDH hours, please email the PI2 Secretary, Haley Hirschfield at or


This talk will provide an overview of two major Inverter Based Resource (IBR) events occurring on May 9th, 2021 and June 4th, 2022, originating in West Texas, informally known as the “Odessa Events”. These events resulted in the tripping of numerous inverter based generators in West Texas on the ERCOT system. The scope of this discussion will include:

  • Details concerning the origin and impact of each event
  • Causes of each solar PV reduction on the ERCOT system
  • Explanation of each inverter fault code
  • Corrective actions determined by discussions between ERCOT and inverter Original Equipment Manufacturer (OEM)
  • Summary of ERCOT activities in response to Odessa Events

  Date and Time




  • Date: 28 Mar 2023
  • Time: 06:00 PM to 08:00 PM
  • All times are (UTC-06:00) Central Time (US & Canada)
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  • Lupe Tortilla
  • 10515 N MoPac Expy
  • Austin, Texas
  • United States 78759
  • Building: Building R
  • Click here for Map

  • Starts 07 March 2023 08:15 PM
  • Ends 27 March 2023 11:00 AM
  • All times are (UTC-06:00) Central Time (US & Canada)
  • Admission fee ?


Julia Hariharan Julia Hariharan of ERCOT ISO


ERCOT Odessa Disturbance Events


Julia Hariharan is an Operations Engineer in the Operations Analysis & Improvement group at ERCOT ISO, where she has been employed since 2021. Julia works alongside Patrick Gravois, a Lead Engineer on her team, to diagnose and analyze all issues related to severe IBR events, including the event that occurred in the Odessa area on June 4th, 2022. Her other responsibilities include documenting other NERC reportable events, assisting with Operations
Improvement meetings, analyzing data and providing information internally pertaining to significant grid events, and various other technical roles. Prior to joining the Operations Analysis & Improvement team, Julia completed the Engineer Development Program at ERCOT ISO, which is a self-paced rotational program for first-level engineers based out of the Network Modeling
group. She received her BSEE degree from the University of Akron in 2019 and her MSEE from Rensselaer Polytechnic Institute in 2020.


Mixer/Food-Refreshments/Sign-In: 6:00 PM to 6:30 PM

Program: 6:30 PM to 7:45 PM

Networking: 7:45 PM to 8:00 PM