Topic:"Capacity Costs" in M12744

Why do this project now? Feeder 92H-331 has a winter peak load beyond the 325 Amp, NS Power Capital Expenditure Justification Criteria (CEJC) and has experienced cold load pickup issues, as observed during the February 4, 2024 extreme cold...

AI summary Feeder 92H-331 exceeds NS Power's 325 Amp design criterion, faces cold load pickup issues, and has a 4% annual load growth rate. Adjacent feeders are also over capacity, limiting operational flexibility. A new feeder is proposed to reduce loading, improve voltage, and enhance reliability. The project is deemed in-service after infrastructure upgrades by July 2026, with a Final Cost Date in June 2027.

B. Capacity

AI summary The document outlines a section labeled 'B. Capacity,' which likely relates to capacity planning or management within the context of a regulatory proceeding. However, no further details or discussion are provided in the text.

This project is being filed as a Class 3 estimate. The defined deliverables for this project indicate that 87% of Class 3 deliverables are completed. A 15% Contingency Value has been applied to this project. Risks intended to be covered by...

AI summary The project is filed as a Class 3 estimate with 87% of deliverables completed. A 15% contingency has been applied to cover risks such as equipment replacement, contract work, environmental mitigation, and additional labor requirements.

1.0 SCOPE This study was initiated to address transformer and feeder overloads at the 92H-Tidewater and 137H-Hammonds Plains substations. Both substations have experienced sustained loading above planning criteria during recent winter peak...

AI summary This study addresses transformer and feeder overloads at 92H-Tidewater and 137H-Hammonds Plains substations due to sustained winter peak loading and forecasted residential growth. It evaluates alternatives to meet planning criteria (133% transformer loading, 325 A feeders) and contingency capacity (e.g., mobile transformers, load transfer) over a 15-year period, recommending capital investments to resolve overloads and ensure reliability.

7.3 Tidewater Economic Analysis The economic analysis model evaluating the alternatives to address Tidewater capacity was developed using the estimates shown in Section 7.1. The results of this analysis are shown below: REDACTED CI C008010...

AI summary The economic analysis model for Tidewater capacity alternatives, based on Section 7.1 estimates, concludes Alternative A has the lowest net present value (NPV) cost among evaluated options.

Request IR-13: - In Attachment 1, Section 5.1.1, NS Power noted the following: - ... recent operating experience has shown that hydro availability cannot be relied upon during winter peak seasons. For these reasons, the hydro capacity are...

AI summary NS Power notes that hydro availability cannot be relied upon during winter peak seasons, leading to exclusion of hydro capacity from 92H contingency calculations. The request seeks clarification on NS Power's strategy for utilizing hydro generation and its impact on system planning for feeder and facility upgrades.

capacity during winter peak load; therefore, load transfer through step-down transformers is not possible. As such, existing feeder 92H-331 has limited load transfer capability with adjacent feeders. NS Power stated that extending feeder 9...

AI summary NSP seeks approval to extend feeder 92H-335 to reduce winter peak load on 92H-331 from 320A to 179A, citing a Planning Study showing load growth will remain within design limits for 10 years. The Board requested clarifications on transformer overload issues at Tidewater substation, which NSP plans to resolve via a $1M transformer upgrade using an existing spare unit.