Topic:"Load Management" in M12661

s ultimately approved by the Board; - As applicable, the form and terms of a Board-approved Dispatchable Rider, Interruptible Rider, and priority interruptible service; Attachment 4, page 12, item g. • The timing and energy production from...

AI summary The document outlines the PHP Deferral process, comparing ELID and ELIADC tariffs, emphasizing cost-based rate structures. NS Power details the ELID Tariff's alignment with Nova Scotia rate-making practices, contrasting it with ELIADC's incremental approach. Key considerations include PHP's PPA energy production, tariff subscription, and deferred cost recovery subject to Board approval.

15 Q HOW WILL NS POWER PROPOSE TO PASS ON THE BENEFITS OF THE DR AND 16 INTERRUPTIBLE SERVICE TO PHP? 17 A There will be two credits made to PHP cost of service. First, NS Power will provide a 18 billing determinant demand charge credit eq...

AI summary NS Power proposes passing benefits of DR and interruptible service to PHP via two credits: a demand charge credit (matching LIIR interruptible rates plus a 10% premium) and a power supply credit based on modeled savings from dispatching PHP load during high-cost periods. This reduces NS Power's supply costs, benefiting PHP while maintaining costs for ATL customers.

NON-CONFIDENTIAL 1 Response IR-4: 2 3 (a) Please refer to the response for SBA IR-1 part (b). 4 5 (b) (i) Please refer to SBA IR-1 part (b). 6 7 (ii-iii) NS Power does not have the breakdown of the distribution of load at the PHP plant. 8...

AI summary NSPI responds to IR-4 by stating it lacks the load distribution breakdown at the PHP plant, only providing total metered load data. The response references prior submissions and highlights data limitations.

FOR THE YEAR ENDING DECEMBER 31, 2027 (1) TOTAL MONTH (2) (3) SMALL COMPANY DOMESTIC GENERAL GENERAL (4) (5) GENERAL LARGE (6) (7) SMALL MEDIUM LARGE (8) (9) (10) (11) INDUST. INDUST. INDUST. ELI 2P-RTP MUNICIPAL UNMETERED POWER GRLF ELIAD...

AI summary The document presents a detailed table of demand data for various customer categories and months from January to December 2027, including total demand, small company domestic general general, large general, small medium large, industrial, municipal, and real-time pricing data. The data is organized by month and includes summed demand totals and specific demand rider information.

NOVA SCOTIA POWER INC. SALES, GENERATION AND DEMAND ANALYSIS FOR JANUARY 2027 (1) MWH SALES (2) ENERGY LINE LOSSES (3) ENERGY REQUIREMENT (4) CLASS NON- COINCIDENT DMD. (KW) (5) SYSTEM COINCIDENT FACTOR (6) SYSTEM COINCIDENT DMD. (KW) (7)...

AI summary This document presents a table of sales, generation, and demand analysis for Nova Scotia Power Inc. for January 2027. It includes metrics such as MWH sales, energy losses, demand factors, and system peak demand. The data is organized into columns with technical terms related to energy management and system performance.

Value Assessment – Illustrative Example 2 - Scenario NSPSO experiences a capacity shortfall and reserve deficiency due to load exceeding forecast, resulting in the need to shed interruptible customers. - NSPSO implements load management pr...

AI summary This example illustrates a scenario where NSPSO faces a capacity shortfall and must interrupt load, prioritizing GRLF and ELIADC customers to avoid interrupting lower rank-order customers, including Shore Power and Large Industrial Interruptible Customers, without providing incremental value to the power system.

CONFIDENTIAL (Attachment Only) - 1 (e) Yes. In each instance, PHP load and LIIR with T&C loads would be held as operating 2 reserve; however, this was insufficient to maintain minimum operating reserve 3 requirements, so LIIR non-T&C custo...

AI summary The text discusses instances where PHP load and LIIR with T&C loads were held as operating reserve but were insufficient to meet minimum requirements, leading to interruptions for LIIR non-T&C customers, referencing Synapse IR-23 part (g). A table is also referenced for further details.

NON-CONFIDENTIAL 1 importance to system operations, any benefits incremental to the Dispatchable Rider, 2 situations where it may not be replaceable with DR actions, and others as described in the 3 PI assessment plans outlined in NSEB IR-...

AI summary The text discusses the importance of certain operational aspects related to the Dispatchable Rider (DR) and situations where it may not be replaceable with DR actions, referencing PI assessment plans outlined in NSEB IR-2 part (b).

NON-CONFIDENTIAL Due to the Dispatchable Rider (DR), NS Power will dispatch PHP's load to optimize generation and reduce total fuel costs. As more wind generation is available on the system, PHP will be scheduled to higher load levels, as...

AI summary NS Power will dispatch PHP's load to optimize generation and reduce fuel costs, particularly with the inclusion of wind energy from the Goose Harbour Lake Wind Farm. Energy from the wind farm will be treated as an IPP and netted off PHP's bill, with potential credits arising from demand shifting during low-cost periods.

NSPI Responses to Synapse Energy Economics, Inc. Information Requests 1 Request IR-1: 15 16 (d) Please provide the timing (date and hour) and load reductions (MW) of direct control 17 actions of PHP in 2022, 2023, 2024, and 2025. 18 19 (e)...

AI summary The document outlines several information requests directed at NSPI, seeking details on load reductions from PHP during specific years, non-NS Power tariff-related load shifting actions, system peak load data, and whether PHP load was curtailed while LIIR customers were not interrupted.

REDACTED (h) Please explain how often frequently both PHP load was curtailed and LIIR customers were also interrupted over the past four years (2022-2025). (i) Please describe the circumstances required for PHP to be fully curtailed to its...

AI summary The text contains three questions regarding curtailment practices: frequency of PHP load and LIIR customer interruptions (2022-2025), conditions for full PHP curtailment with LIIR customer impacts, and maximum LI curtailment scenarios with customer distribution. These focus on operational procedures and system reliability considerations.

Part C – Conditions - (9) Subject only to reasons of health, safety, environmental, system reliability, and Force Majeure events, PHP must not deviate from the NS Power/NSPSO final demand schedule. NS Power/NSPSO must comply with the weekl...

AI summary Part C outlines conditions for PHP's adherence to demand schedules, collaboration with NS Power/NSPSO, handling deviations, and maintaining communication. It emphasizes compliance with system reliability, health/safety, and Force Majeure events, with adjustments tracked and reconciled quarterly. ADC credits may be adjusted based on system cost impacts.

NON-CONFIDENTIAL 1 • System conditions were not stressed at the time of this peak and there were 2 no Advisories, Alerts, or Interruptions in place for non-firm customers, 3 consequently further reduction of load by PHP would not have brou...

AI summary The text states that during the peak period, system conditions were not stressed, and no advisories or interruptions were in place for non-firm customers. Consequently, further load reduction by PHP would not provide resource capacity or grid benefits.

DETAIL OF MONTHLY CLASS SYSTEM COINCIDENT KW DEMAND FOR THE YEAR ENDING DECEMBER 31, 2026 (1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12) (13) (14) (15) (16) TOTAL SMALL GENERAL SMALL MEDIUM LARGE SHORE REAL TIME MONTH COMPANY DOMESTIC...

AI summary The document presents monthly demand data across various customer classes (small domestic, large industrial, etc.) for 2026, including real-time pricing and interruptible rider demands. Totals and class-specific demand figures are aggregated, with notable entries for ELI 2P-RTP and GRLF.

REDACTED ELID Tariff Synapse IR-30 Attachment 2 Page 14 of 15 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Category Usage Data Medium Industrial 37,761,228 34,388,307 37,154,644 34,300,556 36,745,594 38,469,740 38,399,377 35,849,667 35,276,...

AI summary The text presents a table containing usage data categorized by different industrial and municipal sectors, including figures for Medium Industrial, Large Industrial (FIRM and INT), PHP, and Municipal. The data spans multiple years and includes totals for each category.

Response IR-9: (a) PHP is currently seeking approval of the ELID tariff modified to address the concerns raised in its Evidence, Exhibit N-3, at page 8, lines 18-31. (b) Please refer to PHP's response to CA IR-5. (c) Generally a below-the-...

AI summary PHP seeks approval for a modified ELID tariff, emphasizing a cost-based ATL rate. The response addresses concerns about tariff impacts on financial sustainability and references prior submissions. Request IR-10 questions PHP about dispatch events, load curtailment, and the rationale for setting the 3CP value at 8 MW despite a recorded low of 9 MW.

Response IR-10: - (a) Real time schedules are sent out in advance of the next several hours, and do not account for any immediate system disturbances. NS Power sends out real time dispatches that are informed by the best available system i...

AI summary NS Power clarifies that real-time dispatches do not account for immediate system disturbances, citing specific dispatch examples for PHP. It argues that interruptible demand does not require incremental capacity, as NS Power reserves capacity only for PHP's 8 MW firm demand. Dispatch records from 2020-2025 show load adjustments during peak periods, with some instances showing significant load reductions.

regarding load-shifting activity? - A. Yes. NSPI states that "[b]ecause the cost of the [DR credit] service is based on the benefit the - service provides to the system, [above-the-line] customers will be held harmless under the [Dispatcha...

AI summary NSPI confirms that load-shifting activity is addressed by holding above-the-line customers harmless under the Dispatchable Rider construct, as the cost of the DR credit service is tied to system benefits.

EXTRA LARGE INDUSTRIAL ACTIVE DEMAND CONTROL TARIFF Page 3 of 7 Schedule 1: Active Demand Control Energy Supply Protocol - (a) With respect to forecast PHP annual capital shutdowns, PHP will provide a minimum of one month's advance notice...

AI summary This section outlines the procedures for adjusting demand schedules and communication protocols under the Extra Large Industrial Active Demand Control Tariff, including advance notice requirements for shutdowns, intra-day schedule updates, and conditions for rate adjustments based on cost differences.

CONFIDENTIAL (Attachment Only) 1 Request IR-5: 2 3 Reference: 2025 Annual Report, Exhibit N-1, p. 3/9, Load Variations 4 5 PHP's initial 2025 forecast totalled 811 GWh. There were revisions to PHP's 6 7 load forecast through the year, with...

AI summary The document contains a request for information regarding PHP's 2025 load forecast, including initial forecasts, revisions, and the impact of forecast divergence on dispatch optimization and the CBL energy charge. It also references the ELIADC Tariff 2025 Annual Report and a matter number (NSEB M12768).

3.3 Issues With The Proposed IR - The ELID proposes that in addition to the DR control that NSP has over PHP's load, PHP will also be provided - with a separate credit for being interruptible at times of system constraints. This credit is...

AI summary The proposed ELID plan's interruptibility credit for PHP is challenged due to evidence that PHP's load is already dispatched down by NSP under existing DR mechanisms, rendering interruptions redundant. NSP's data shows no interruptions for PHP since 2020, as load reductions occur preemptively during capacity scarcity.

Response IR-5: - (a) Yes. - (b) FAM customers. - (c) There may be, but we have not developed one. Our recommendation is that any payments to PHP from FAM customers under the DR credit must be demonstrably tied to PHP deciding to shift load...

AI summary The response addresses demand response (DR) program design, emphasizing that payments to PHP from FAM customers must be tied to load-shifting due to energy prices. It compares the ELID Tariff's ex post demand control calculation to the ELIADC Tariff, noting differences in embedded cost rates and Goose Harbour Wind Farm output. Concerns about exogenous fuel cost fluctuations masking actual DR benefits are highlighted, referencing Bates White's audit.

Request IR-6: 2 Reference: N-20 Bates White Evidence, at p. 23, lines 19-23. We are unconvinced that PHP would ever have incentive to levelize its load. PHP itself explains that its load is dependent on its business activity, is subject to...

AI summary The text argues that PHP lacks incentive to levelize its load due to business activity dependencies, seasonal fluctuations, and potential spikes up to 25% of Nova Scotia's power, making levelized load unrealistic.

It is made clear by the terms of the PSA that only the energy in - 24 excess of the energy purchased under the Ministerial approved PSA is subject to regulated NS - 25 Power tariffs. 1 2627 - Q. At page 28 of Bates White's Evidence, Bates...

AI summary The response explains that PHP follows NS Power's dispatch schedules for load shifting, not based on energy price signals. Load shifting is done to reduce energy consumption during high-cost periods and increase it during low-cost periods, aligning with NS Power's economic dispatch optimization tools. Failure to shift load may reduce potential credits under the ELID.

M12661 NOVA SCOTIA ENERGY BOARD IN THE MATTER OF: The Public Utilities Act, R.S.N.S. 1989, c.380, as amended IN THE MATTER OF: Application by Nova Scotia Power Inc. for Approval of an Extra Large Industrial Dispatchable Above-the-Line Tari...

AI summary The Nova Scotia Energy Board has issued information requests to Port Hawkesbury Paper regarding events from 2020 to present related to load reductions and dispatchable events. The requests seek details on the reasons for events, their duration, base load reduction, and 5-minute interval load data.

- b. Please provide the workpapers calculating each rate element of the Large Industrial tariff. 1 c. Please explain why the LIIR credit is lower than that which would have been 22 were not interrupted? If so, how frequently did this occur...

AI summary The text contains a series of questions related to the Large Industrial tariff, LIIR credit, curtailments, and the ELID tariff. It requests workpapers, explanations of curtailment frequency, and bill calculations under different tariff scenarios.

- ii. Can PHP be dispatched for load reduction prior to the first tier of interruptible load being interrupted, that being Generation Replacement and Load 1 Following Tariff. Please provide historical examples of PHP being dispatched 22 i....

AI summary The document asks whether PHP can be dispatched for load reduction before interruptible load is interrupted, specifically Generation Replacement and Load Following Tariff. It also requests historical examples of PHP dispatches and clarification on the application of the Interruptible Rider to load above a customer's firm contracted load.

c. Please describe if the load reduction should have been instituted as a real time 1 b. Please provide the date and time of interruptions and direct control actions for PHP for 2 each of 2022, 2023, 2024, and 2025. Please provide an estim...

AI summary The text includes a request for details on load reduction during specific peak periods, including the dates and times of interruptions and direct control actions for PHP in 2022–2025, and the associated capacity reductions. It also asks about the impact of not reducing load during certain peak hours and the associated costs or benefits.

during the peak periods of 1/11/2022, 2/15/2022, 12/13/2022, and 12/22/2023? If not, why not? 2. Please provide the date and time of interruptions and direct control actions for PHP for each of 2022, 2023, 2024, and 2025. Please provide an...

AI summary The text includes a series of questions directed at NS Power regarding load interruption events, cost causation related to peak demand, and confidential responses to undertakings and COSS. It focuses on specific dates and the impact of load reduction on resource capacity and grid stability.

Response IR-11: The statement in Exhibit N-1, page 9 lines 5 to 7 is based on operational experience. NS Power does not track potential instances of Emergency Energy Alert situations, which were avoided by being effectively managed by supp...

AI summary The response discusses NS Power's handling of emergency energy alerts and the dispatch of PHP during such events. It raises questions about whether PHP was dispatched down to minimum load, the instances of load constraints, and the use of interruptibility provisions under the ELIADC tariff.

mber of occasions when Advisories, Alerts, and LIIR Interruptions occurred in the past number of years. PHP would have been dispatched down to minimum load for these occasions. [emphasis added]

AI summary The text discusses the frequency of Advisories, Alerts, and LIIR Interruptions over the past several years and notes that PHP would have been dispatched to minimum load during these events.

S Power may change the above order of interruption by interrupting Large Industrial Interruptible Rider Tariff customers whose load is not held as Operating Reserve before interrupting the Customer. 1. Please explain in what circumstances...

AI summary The text discusses potential changes to the order of customer interruption under the Large Industrial Interruptible Rider Tariff (LIIR) and Extra Large Industrial Dispatchable Capacity (ELID), raising questions about priority status, credit for interruptibility, and how PHP (Port Hawkesbury Paper) compares to other customers in terms of value and priority.