Topic:"Electricity Generation" in M12591

C0032664 NSEB IR-5 Attachment 1 Page 13 of 92 REDACTED (CONFIDENTIAL INFORMATION REMOVED) FINAL NS POWER DISPATCH STUDY or optimization tools are generating sub-optimal dispatch results. Based on Concentric's findings, these investments al...

AI summary The document discusses NS Power's dispatch study, emphasizing the need for a portfolio-based evaluation of dispatch performance and the potential benefits of automation in optimizing processes. It highlights the importance of considering both energy output and ancillary services in evaluating asset performance.

a. Observations - O1: The Marketing Desk optimizes the dispatch schedule to solve for the economics of the dispatch of the facilities for energy and ancillary services that yield the smallest cost possible. The Control Center reassesses an...

AI summary The document outlines observations regarding the optimization of dispatch schedules and ancillary services. It notes that the Marketing Desk and Control Center work together to minimize costs, and that PortOps® is being used appropriately for modeling Tufts Cove, though there are challenges in aligning gas procurement with electric dispatch planning.

Similarly, the facility provides important regulation and operating reserves services. Currently, it is the only unit in the NS Power hydro fleet that is equipped with Automatic Generation Control ("AGC"). AGC is a capability that allows a...

AI summary The facility provides regulation and operating reserves services and is the only NS Power hydro unit equipped with Automatic Generation Control (AGC), which allows real-time power output adjustments. Wreck Cove's regulation capabilities are discussed, along with operational constraints and water storage conditions affecting daily maximum output.

4.7 Hydro Capacity and Energy Optimization Practices65 The NS Power Market Procedures recognize that certain hydro facilities may be subject to firm limits on discharge over the day, either to preserve reservoir limits at prescribed minimu...

AI summary This section discusses hydro capacity and energy optimization practices, including the need to account for firm discharge limits, environmental considerations, and the integration of hydro facilities with grid operations. It also notes the importance of communication between hydro and grid operators, and the role of dispatch software in managing limitations, such as those at Wreck Cove. Long-term optimization work is ongoing but outside the scope of the current dispatch study.

4.8 Prospective Operation and Performance As noted above, Wreck Cove is one of NS Power's most flexible and valuable generating stations. Its value cannot be singularly assessed through its energy and capacity contributions, but rather nee...

AI summary Wreck Cove is a flexible generating station whose value extends beyond energy and capacity contributions to include ancillary services. Its operation depends on water levels and management, factors outside the control of operators. As NS Power adds more intermittent renewables, Wreck Cove's role will shift toward system support, with improved dispatch algorithms enhancing its efficiency.

C0032664 NSEB IR-5 Attachment 1 Page 48 of 92 REDACTED (CONFIDENTIAL INFORMATION REMOVED) FINAL NS POWER DISPATCH STUDY But due to the availability and water management, the facility is less flexible and more complicated to operate than th...

AI summary The document discusses the unique configuration and operational complexity of the Wreck Cove hydroelectric facility, noting its hybrid characteristics between impoundment and run-of-the-river systems. It highlights the challenges in modeling such facilities with economic dispatch platforms like PLEXOS® and PortOps®, emphasizing that discrepancies in generation forecasts stem from the asset's uniqueness rather than model inaccuracies.

C0032664 NSEB IR-5 Attachment 1 Page 50 of 92 REDACTED (CONFIDENTIAL INFORMATION REMOVED) FINAL NS POWER DISPATCH STUDY SECTION 5:

AI summary This section of the NS Power Dispatch Study discusses the final analysis and findings related to the dispatch process. It includes detailed information on energy control systems, real-time economic dispatch, and other related procedures used in power management.

5.3. Market Rules The Electricity Act , which opened the Nova Scotia electricity market to wholesale competition, went into effect on February 1, 2007. The Nova Scotia Power Wholesale Market Rules govern the administration and execution of...

AI summary The Electricity Act opened Nova Scotia's electricity market to wholesale competition in 2007. The Wholesale Market Rules and Procedures, governed by the Nova Scotia Power System Operator (NSPSO), outline the processes, documents, and forms used in the administration of the wholesale market.

5.5. Heat Rates NS Power used to dispatch its fleet using an average heat rate to align with an era where the average heat rate was dominated by one larger coal unit, such that any more efficient heat rates included in the average did not...

AI summary NS Power previously used average heat rates for dispatch, but now uses incremental heat rates in optimization models like PortOps® and PLEXOS®. The change reflects the inclusion of more efficient units and renewable generation. Concentric supports continuing this approach, emphasizing the need to evaluate dispatch in the context of the entire portfolio and ancillary services.

C0032664 NSEB IR-5 Attachment 1 Page 61 of 92 REDACTED (CONFIDENTIAL INFORMATION REMOVED) FINAL NS POWER DISPATCH STUDY - The New Brunswick Power Corporation System Operator ("NBPSO") initiates activation of Operating Reserve, or either pa...

AI summary Nova Scotia Power's dispatch process relies heavily on the Marketing Desk's optimized economic dispatch solution, which is then adjusted by the Control Center based on real-time conditions. The system is unique due to its isolation and the dominance of a single market participant. The Control Center's economic dispatch tools are less comprehensive than those used by the Marketing Desk and System Planning.

C0032664 NSEB IR-5 Attachment 1 Page 65 of 92 REDACTED (CONFIDENTIAL INFORMATION REMOVED) FINAL NS POWER DISPATCH STUDY in our perspective, it is consistent with the auditor's Recommendation IX-1103 for NS Power to take steps to increase c...

AI summary The document discusses the need for NS Power to enhance its IT platform to improve the accuracy of derate reporting and align economic dispatch optimization with real-time market conditions, referencing examples from PJM and Alberta's ISO. It emphasizes the importance of real-time analytical tools for the Control Center to reoptimize dispatch within two hours.

6.3 Current Tools - 1. PLEXOS ®.127 PLEXOS® is the economic dispatch tool utilized by NS Power's System Planning and Portfolio Optimization groups and it is sold and maintained by Energy Exemplar. The vendor produces one of the most popula...

AI summary This section outlines the current tools used by NS Power for economic dispatch and planning, including PLEXOS®, PortOps®, PRT®, and AWS TruePower. These tools are utilized for long-term planning, forecasting, and market support functions.

C0032664 NSEB IR-5 Attachment 1 Page 86 of 92 REDACTED (CONFIDENTIAL INFORMATION REMOVED) FINAL NS POWER DISPATCH STUDY SECTION 7:

AI summary The document presents a final section of the NS Power Dispatch Study, focusing on the Integrated Resource Plan (IRP) and related operational systems such as the Security-Constrained Economic Dispatch (SCED) and Real-Time Security-Constrained Economic Dispatch (RT SCED). It references various energy management systems and technologies used in power dispatch operations.

CONFIDENTIAL (Attachment Only) 1 of $24.3 million for the four projects. Due to each project's progress to the end of March 2 2025, the Optimization Tools project received less funding than originally anticipated but 3 the others all recei...

AI summary NS Power received funding for four projects under the Electricity Predevelopment Program (EPP), with a total of $24.3 million allocated. Funding was adjusted due to project progress, and all eligible costs were reimbursed at 100 percent, covering 44 percent of total project costs. The funding agreement and amendments are detailed in a confidential attachment.