GIC Modeling Deadlines Approaching for NERC TPL-007-1 Compliance
Deadlines set by independent system operators to comply with NERC TPL-007-1 are quickly approaching.
As we’ve discussed in an earlier blog post, NERC standard TPL-007-1 was developed to help protect the bulk electric system from the impact of geomagnetic disturbances (GMDs). A byproduct of solar storms, GMDs carry the potential to trigger voltage collapse, cause widespread power outages and damage power transformers.
R2: Collection of GIC Modeling Data
Upcoming deadlines relate to TPL-007-1 Section R2: Collection of GIC Modeling Data. Regional transmission operators (RTOs) must perform studies based on information provided by their transmission and generation companies. As a result, RTOs have requested applicable generation and transmission owners (GOs/TOs) connected above 200 kV fulfill compliance requirements of Section R2 by mid-to-late 2017. Exact dates depend on where you operate. Details from two regional independent system operators, Electric Reliability Council of Texas (ERCOT) and ISO New England (ISO-NE), are provided below.
ERCOT has informed applicable generation and transmission owners (GOs/TOs) that the compliance requirement to provide GIC modeling data and information as specified in TPL-007-1 Section R2 must be completed by June 30, 2017.
Once GMD network vulnerability assessments have been completed, applicable GOs/TOs may also be required to conduct a GIC transformer thermal impact assessment as specified in TPL-007-1 Section R6.
ISO-NE has separate deadlines for generation owners and transmission owners. TOs must fulfill the compliance requirement to provide GIC modeling data and information as specified in TPL-007-1 Section R2 by November 30, 2017, while GOs must complete the requirement by December 31, 2017.
After GMD network vulnerability assessments are completed, GOs/TOs may also be required to conduct a GIC transformer thermal impact assessment as specified in TPL-007-1 Section R6.
ISO R2 Deadlines
The table below shows deadlines the independent system operators (ISOs) have set for in TPL-007-1 R2 submissions:
- Watch Presentation — Geomagnetic Induced Current (GIC) and In-Service Transformers
- Geomagnetic Disturbance Risk Mitigation Services Page
- NERC TPL-007-1: Geomagnetic Disturbances and What They Mean for Your Large Power Transformers