XI.C. Conclusions Conclusion XI-1: NSPI, to its credit, was able to keep its system running reliably through the period following the cyber event. However, the loss of automation and information required for scheduling and dispatch would h...
AI summary The document highlights NSPI's ability to maintain system reliability post-cyber event but notes inefficiencies and increased costs due to lost automation. It identifies issues with scheduling processes, RTED functionality, and dispatch of PH Biomass. There are concerns about understated system marginal costs and increased GHG emissions. A new Economic Dispatch Optimization Solution is expected to address some inefficiencies.
XV.B.4.b. The Number of PHP Deviations from Schedule During the audit period, we identified hours with a deviation from schedule when in the same hour NSPI did not. Also, we identified hours in which we found no deviation but NSPI did find...
AI summary The audit identified discrepancies in the number of PHP deviations from schedule compared to NSPI's findings, attributed to ramping issues and measurement problems. It recommends hourly identification of deviations for consistency with independent system operators. Cause Code 3 (PFL) and 5 (PDN) deviations show varying trends over the 2020-2025 period, with PNA deviations doubling between 2023 and 2024. In 2025, deviations were not tracked during a cyber event.
XV.B.5.b. Comparison of Wind Generation and PHP Load Figure XV-18 provides a comparison over the audit period of 14-day average hourly PHP load and system wind generation. Under ELIADC co-optimization, the expected relationship between the...
AI summary The audit period analysis of wind generation and PHP load under ELIADC co-optimization shows no significant correlation between the two, despite expectations of a positive relationship. Only a weak correlation of 0.14 was observed in the limited data available after a cyber event affected data integrity.