Oncor recently developed a three-year System Resiliency Plan (SRP) to harden and modernize the transmission and distribution system to improve overall resilience against resiliency events for customers in North Texas. The SRP includes investment to mitigate a wide range of storm-based events, including thunderstorms, ice storms, blizzards, extreme hot and cold, and other resiliency risks such as security threats against physical and cyber infrastructure. This presentation focuses on the resiliency measures developed to mitigate risks from storm-based events by hardening and modernizing the T&D system. 

Oncor leveraged an integrated resiliency and risk model to simulate 22 different storm events across a service territory the size of New York State. The model built the relationship between three foundational data sets to establish the relationships between events and customer outages: 1) 25 years of historical NOAA event data; 2) 10 years of historical outage records, and 3) Oncor's Geographic Information System (GIS). By integrating and mapping these three data sets, Oncor and 1898 & Co. established relationships between events, and their impact on asset failure. 

Key Takeaways:

• Review of the resilience framework at the system and project level, how resilience benefits were calculated to justify the investment to stakeholders, and the measures developed to enhance system resiliency
• Impact of major events on customer outages
• Impact of these events on specific types of infrastructure
• Show the relationship between major events and underground cable failures.
• Execution approaches