Central & Western MA Cluster Study and ASO Study Update - December 5, 2019 Marlboro, MA
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Central & Western MA
Cluster Study and
ASO Study Update
December 5, 2019
Marlboro, MA
National Grid 1
Agenda
00 Welcome/Safety 02 ASO study Update
01 Transmission Study Update - Potential/On-going ASO studies
- Total Study Overview - GNF/PPA Process
- Part 1: Study Overview - Prioritization
- Part 2: Study Plan 03 MA Data Portal Demo
- Transmission Asset Management 04 Questions
- Next Steps
- Distribution Study Update
- Estimates by D-Study Area
National Grid 2
Safety Message – Winter Driving Safety Prepare Your Car – ❅ Keep a bundle of cold-weather gear in your car, such as extra food and water, warm clothing, a flashlight, an ice scraper, blankets, medications, jumper cables, and more. ❅ Make certain your tires are properly inflated and have plenty of tread. ❅ Keep at least half a tank of fuel in your vehicle at all times. ❅ Never warm up a vehicle in an enclosed area, such as a garage. ❅ Be sure your cellphone is charged before traveling incase you get stuck. Avoid a Crash – ❅ Avoid using cruise control in wintry conditions. ❅ Steer in the direction of a skid, so when your wheels regain traction, you don’t have to overcorrect to stay in your lane. ❅ Accelerate and decelerate slowly. ❅ Increase following distance to 8 to 10 seconds. ❅ Stay home. Only go out if necessary. National Grid 3
Disclaimer:
This presentation has been prepared solely as an aid to
discussions between National Grid and interested
stakeholders, and should not be used for any other purposes.
This presentation contains high-level, general information (not
project specific) which may not be applicable in all
circumstances. National Grid makes no guarantees of
completeness, accuracy, or usefulness of this information, or
warranties of any kind whatsoever, express or implied.
National Grid assumes no responsibility or liability for any
errors or omissions in the content. Nothing contained in this
presentation shall constitute legal or business advice or
counsel.
No party is authorized to modify this presentation.
The Webex is being recorded.
National Grid 4
01 Central/Western MA Cluster Study Transmission Update Barry Ahern – Transmission Planning, NEP Mike Porcaro – Distribution Planning, MECo
Transmission: Total Study Overview (May 2019)
Total: 937MW (240 Projects)
Part 1: 372MW
Part 2: 565MW
Magnitude of Applications in Western MA
760
>1MW - 4.99MW
200
180
>5MW
40
0 100 200 300 400 500 600 700 800
MWs No. of Applications
Goal: Progress a high volume of projects the most effective and efficient way
possible while identifying the appropriate upgrades to the system.
National Grid 6
Transmission: Part 1 Overview
Part 1 of the study appears to be the most efficiently completed Non-FERC
transmission interconnection study in the USA with the most points of
interconnection.
• Part 1: 372 MW scope
• Projects: 90+ Projects
• Substations: 30+ Substations
• Timeframe: 6 months
Study Start: May 2019
Steady State Analysis - Stability Analysis
Short Circuit Analysis - PSCAD Analysis
National Grid 7
Transmission: Part 1 – Category 2 Initial Results
Category 1: 14.5 MW No Thermal Overloads
Category 2: 75.5MW Overvoltages on • E-205
• A1/B2
• E5/F6
• A127/B128
• Y-25
National Grid 8
Transmission: Part 1 – Category 2 Re-Evaluation
Assumptions (Internal)
Working with Distribution Planning, we reviewed:
• Would shifting load at certain stations be possible
• Would moving Gen address the issues
Validation of Impacts
Assumptions (external)
• Commenced re-evaluating study assumptions within/outside of area
• We observed a number of reactive devices that could be switched off out side of the area
• The tweaks outside of area resolved a number of the voltage issues observed
• It resolved the voltages issues on a number of the offending circuits
• Brought the magnitude of the issues on the worst circuits down
National Grid 9
Transmission: Part 1 – Category 2 Potential Solutions
Solutions Assessed for Category 2
1. Utilization of Inverters
• Issues with Voltage coordination
2. Utilization of Distribution Capacitor Banks (SMART)
• Proven to be viable
3. Distribution Reactors
4. Transmission Reactors
SMART Capacitor Bank Solution
• Utilization of existing capacitor banks on feeders was an innovative method to resolve the adverse
impacts observed
• This is not a fully scalable solution
• This work also fit the Grid Mod program.
Result
In 4 months (August 2019) - NG brought 90MW of GNFs to the RC for approval.
National Grid 10Transmission: Part 1 – Category 3 (282MW)
Stakeholder Meeting (August 13) – Adverse Impacts Observed
Thermal Solutions (1 of 3 Options):
1. Reconductor 10 mile of the B2 line between Otter River and Pratts Junction
2. Installation of a Battery at East Westminster
3. Limited Operation: Preventing approximately 20MW from interconnecting on eastern section of B2 line
Voltage
1. Direct Transfer Trip Schemes between Pratts Junction and Both Otter River and Crystal Lake on the A1
and B2 circuits
2. All other types of solution identified when assessing Category 2
Affected Party Engagement
• Challenge to ISO-NE that one of the assumptions being utilized was not accurate
• Subsequent letter to ISO-NE
• Assumptions were re-evaluated and remained unchanged
National Grid 11Transmission: Part 1 (Finalizing Report)
Scorecard in September 2019:
1. Thermal: Reconductoring/Battery (millions of $)
2. Voltage: Reactors (millions of $)
3. Stability: Protection schemes ( millions $)
4. PSCAD – Potentially not feasible in timeframe
5. Short Circuit: No issues identified
New Study Inputs
1. Continued review = PP5-6: Section 3.4 No Increase in Conditional Dependence
• Increased dependency on Vernon Hydro following N-1 event
• Result: New Upgrade
A1: Span remediation between Royalston - Otter River ($)
2. Attrition – 372MW to 325MW
National Grid 12Transmission: Part 1 (Finalizing Report)
October 2019: 325MW
1. Thermal: Reconductoring/Battery on B2 Circuit (millions of $)
2. Voltage: Reactors multiple locations (millions of $)
3. Stability: Protection schemes involving multiple stations ( millions $)
4. PSCAD – Potentially not feasible in timeframe
5. A1: Span remediation between Royalston - Otter River ($)
Thermal: Re-ran All Cases
1. Revised MW numbers did not trigger the overload
2. No thermal remediation was deemed necessary
National Grid 13Transmission: Part 1 (Finalizing Report)
October 2019: 325MW
1. Thermal: Reconductoring/Battery on B2 Circuit (millions of $)
2. Voltage: Reactors multiple locations (millions of $)
3. Stability: Protection Schemes involving multiple stations ( millions $)
4. PSCAD – Potentially not feasible in timeframe
5. A1: Span remediation between Royalston - Otter River ($)
Voltage: Internal Review
Transmission
• Assessed the settings of equipment in the area
• Identified is reasonable action could be taken to improve voltages in the area
Distribution
• Applied all of the SMART Cap solutions available in this area
National Grid 14Transmission: Part 1 (Finalizing Report)
October 2019: 325MW
1. Thermal: Reconductoring/Battery on B2 Circuit (millions of $)
2. Voltage: Reactors multiple locations (millions of $)
3. Stability: Protection schemes involving multiple stations ( millions $)
4. PSCAD – Potentially not feasible in timeframe
5. A1: Span remediation between Royalston - Otter River ($)
Residual Voltage Issues: Reviewed 6 solutions
1. Operator Action - Discussed with NG control centers and formally proposed to ISO-NE
2. Inverters – Coordination not possible
3. Distribution Cap. Banks – Reliability concern with this occurring at Peak
4. Direct Transfer Trip – Determined optimal
5. Distribution Reactors
6. Transmission Reactors
National Grid 15Transmission: Part 1 (Finalizing Report)
October 2019: 325MW
1. Thermal: Reconductoring/Battery on B2 Circuit (millions of $)
2. Voltage: Reactors multiple locations (millions of $)
3. Stability: Protection schemes involving multiple stations ( millions $)
4. PSCAD – Potentially not feasible in timeframe
5. A1: Span Remediation between Royalston - Otter River ($)
Stability: Reviewed All Related Standards
This included
• ISO-NE SRD
• NG ESB 756
• IEEE 1547
• Identified if Momentary Cessation was applied - adverse impacts relating to ISO-NE PP3 could be mitigated
• ISO-NE confirmed that this change would be appropriate
• Letter to Developers in Mid-October/NG ESB 756 to be re-written
National Grid 16Transmission: Part 1 (Finalizing Report)
October 2019: 325MW
1. Thermal: Reconductoring/Battery on B2 Circuit (millions of $)
2. Voltage: Reactors multiple locations (millions of $)
3. Stability: Protection schemes involving multiple stations ( millions $)
4. PSCAD – Potentially not feasible in timeframe
5. A1: Span remediation between Royalston - Otter River ($)
PSCAD
• Reviewed final scope with contractor
• Agreed on assumptions to implement in order to complete study
• Set expectations for outputs
National Grid 17Transmission: Part 1 (Finalizing Report)
October 2019: 325MW
1. Thermal: Reconductoring/Battery on B2 Circuit (millions of $)
2. Voltage: Reactors multiple locations (millions of $)
3. Stability: Protection schemes involving multiple stations ( millions $)
4. PSCAD – Potentially not feasible in timeframe
5. A1: Span Remediation between Royalston - Otter River ($)
A1 Remediation: 3 Potential Solutions
• Transmission Tower Replacement
• Tensioning
• Distribution Relocations
Scope Change (4.9MW withdrew)
Re-ran the cases and the remediation was deemed not necessary
National Grid 18Part 1 - Conclusion
Reliability Committee - November 19
• Submission of Agenda on October 31
• Submission of 56 Proposed Plan Applications by November 5
• Following Reliability Committee recommendation for approval
• ISO-NE made determination that an alternative solution as discussed with NG in October would be
acceptable
Lessons Learned End Results for Part 1
• More time is required to review PPA prior to RC Category 1 (14.5MW – No Cost to Developer)
meeting
- No requirement for study
• Big changes or changes too late in the process will
Category 2 (75.5MW – No Cost to Developer)
impact this timeframe
- Utilization of SMART Caps. to mitigate voltage issues
Category 3 (230MW – No Cost to Developer)
- Tap Change on at Adams and maximized utilization of SMART Caps.
National Grid 19Part 2 – Scope Review
Scope – May 2019 Scope – November 2019
• Total: 937MW • Total: 751MW
• Part 1: 372MW • Part 1: 325MW
• Part 2: 565MW • Part 2: 431MW
• Projects: 90+ Projects (Part 1) • Projects: 120+ Projects (Part 2)
• Substations: 30+ Substations • Substations: 50+ Substations
Notes:
• Part 2 will include 5 new distribution substations & 9 rebuilds
• The impact of the attrition is being assessed relative to the distribution solutions
• A population of the developments in Part 1 will be mapped to new stations
• Transmission need to proceed with the study assuming no changes
National Grid 20Part 2 – Timeline (0-6 weeks)
December 2019 – January 2020
Draft Steady State Analysis Results Dec 15
Validate all PSCAD Models Dec 9
Validate all Stability Models Dec 21
Determine Steady State Analysis Solutions Dec 15 – Jan 1
Commence PSCAD and Stability Study Jan 6
Commence Short Circuit Analysis Jan 12
National Grid 21Part 2 – Timeline (6-10 Weeks)
January 2020 – February 2020
Finalize Short Circuit Analysis Feb 7
Determine Short Circuit Analysis Solutions Feb 7 – Feb 24
Draft PSCAD and Stability Reports for review Feb 10
Finalize Stability Study & Solutions Feb 10 – March 1
Draft Study Complete March 10
National Grid 22Part 2 – Timeline (10-14 Weeks)
March 2020 – April 2020
Complete All PPAs (120) March 1 – March 25
Complete all analysis prompted by review March 15
Final Cycle by Affected Parties March 1 to March 25
Submit Agenda, PPAs and Study March 13
Comments from ISO-NE/Affected Parties March 25 – April 12
Present Study at April RC April 15
National Grid 23What is an Asset? “An item, thing or entity that has potential or actual
value to an organization” – ISO 55000
What are National Grid’s Transmission Assets?
Substation, Circuits, Breakers, Switches, Communications, Security
“…the coordinated activity of an organization to
Transmission Asset Management? realize value from assets.” – ISO 55000
Asset Management focuses on embedding risk-based, value-driven, whole life decision-making
for our assets. All decisions to spend should be prudent
The management system back-bone and platform that unifies all facets of National Grid
• Bridges siloed decision-making stakeholders and processes to make holistic decisions on assets
National Grid 24Transmission Asset Management Framework National Grid 25
Map of Transmission Asset Projects
• Illustration of Asset Condition Projects in next 5 years in Western/Central MA
• Overlap on assets targeted with potential DG prompted upgrades
• If DG prompts an upgrade where an asset condition is planned
• DG will only pay for what is not already in the scope
National Grid 26Transmission Next Steps
High Level Cluster Timeline
Jan 2020 Identify the final transmission upgrades required for thermal/voltage
Feb 2020 Conclude Study (PSCAD/Stability/Short Circuit) with relevant upgrades
March 2020 Submit all of the PPAs to ISO for review
Determine overlap with Asset Projects and Upgrades
Determine cost allocation for upgrades
April 2020 Final Presentation to Reliability Committee
National Grid 27Distribution Area Study Update Michael Porcaro – Distribution Planning, MECo National Grid 28
Level of DG Saturation
Areas requiring MECo Distribution System upgrades
• Barre >48 MW • Leicester >48 MW
• Belchertown >32 MW • Brookfield >16 MW
• Athol >42 MW • Palmer >43 MW
• Gardner >85MW
Total in excess of 315MW
Upstream affect on additional substations that connect to the transmission lines
serving above areas
• Considering these additional affected subs, >750MW seeking to interconnect
Perspective:
• Vermont Yankee, Nuclear Power Plant, Vernon VT: 620 MW (decommissioned 2014)
• Typical “Heavily Loaded” 15kV Feeder: ~10 MW
• “Worcester Area Load”: approx. ~165 MW (low period)
National Grid 29Distribution Area Preliminary Analysis
Distribution Planning identified 7 specific concentrated areas currently
encompassing over 20 substations in MECo’s service territory.
◦ 5 new substations
◦ 9 substations to be significantly expanded and/or rebuilt
◦ 2 substations to be retired
◦ Remaining substations to undergo upgrades in support of feeder level system
modifications
Current expectations for Distribution Level solutions
◦ New substations and/or expansion of existing
◦ Rearrangement of distribution feeders
◦ Alternative distribution feeder voltage class
Total approximately $370M of infrastructure modification
National Grid 30Gardner Area - $96M; 5yrs
Total of 22 applications comprising >85MW
Rebuild East Winchendon Substation at existing location:
• Replace (1) existing 115kV:13.8kV substation transformer with 55MVA unit
• Install (1) new 55 MVA 115 kV:13.8 kV and (1) new 75 MVA 115 kV:34.5 kV substation transformers
Retire existing Westminster Substation & replace with new at new location:
• Install (2) new 55 MVA 115 kV:13.8 kV and (1) new 75 MVA 115 kV:34.5 kV substation transformers
New transmission taps to new substation transformers
New distribution feeder installation and area feeder reconfiguration
Area Substations
Ashburnham E. Winchendon
Crystal Lake Whitmanville (New
E. Westminster Replacing Westminster)
Values shown are approximate, for reference purposes of this presentation. Work scope describes the preliminary
proposed distribution solution which will be reviewed by the ASO. This solution is subject to change in whole or part
National Grid pending the results of the ASO studies. Does not reflect required system modifications for ASOs. 31Leicester Area - $39M; 5yrs
Total of 13 applications comprising >48MW
Upgrade North Oxford Substation at existing location:
• Install (1) new 55 MVA 115 kV:13.8 kV substation transformer
Retire existing Leicester Substation and replace with new near Stafford St in Leicester:
• Install (2) new 55 MVA 115 kV:13.8 kV substation transformers
Install 3V0 at Pondville Substation
New transmission taps to new substation transformers
New distribution Feeder installation and area feeder reconfiguration
Area Substations
Pondville Webster St.
N. Oxford Stafford St. (New Replacing
Leicester)
National Grid Values shown are approximate, for reference purposes of this presentation. Work scope describes the preliminary 32
proposed distribution solution which will be reviewed by ASO. This solution is subject to change in whole or part pending
the results of the ASO studies. Does not reflect required system modifications for ASOs.Brookfield Area - $54M; 4yrs
Total of 4 applications comprising >16MW
Upgrade Meadow St Substation at existing location:
• Install (1) new 55 MVA 69kV:13.2kV substation transformer
Install new substation near Cronin Rd in Brookfield:
• Install (2) new 55 MVA 115 kV:13.2 kV substation transformers
New transmission taps to new substation transformers
New distribution Feeder installation and area feeder reconfiguration
Area Substations
Lashaway Meadow St.
Brookfield (New)
National Grid Values shown are approximate, for reference purposes of this presentation. Work scope describes the preliminary 33
proposed distribution solution which will be reviewed by the ASO. This solution is subject to change in whole or part
pending the results of the ASO studies. Does not reflect required system modifications for ASOs.Athol Area - $52M; 4yrs
Total of 13 applications comprising >42MW
Upgrade Royalston Substation at existing location:
• Replace existing 3.75MVA, 69kV:4kV transformer with 40MVA, 69kV:13.2kV
Install new substation in New Salem:
• Install (1) new 75 MVA 115kV:34.5kV substation transformer
Upgrade Wendell Depot Substation at existing location:
• Replace (1) existing 20MVA, 115kV:13.8kV substation transformer with 55MVA unit
• Install (1) new 55 MVA 115 kV:13.8 kV substation transformer
New transmission taps to new substation transformers
New distribution Feeder installation and area feeder reconfiguration
Area Substations
Chestnut Hill Royalston
Wendell Depot New Salem (New)
National Grid Values shown are approximate, for reference purposes of this presentation. Work scope describes the preliminary 34
proposed distribution solution which will be reviewed by the ASO. This solution is subject to change in whole or part
pending the results of the ASO studies. Does not reflect required system modifications for ASOs.Palmer Area - $62M; 4yrs
Total of 14 applications comprising >43MW
Upgrade Palmer Substation at existing location:
• Replace (1) existing 20MVA, 115kV:13.2kV substation transformer with 55MVA unit
• Install (1) new 55 MVA 115kV:13.2kV substation transformer
Upgrade Little Rest Rd Substation at existing location:
• Install (1) new 55 MVA 115kV:13.2kV substation transformer
• Install (1) new 75 MVA 115kV:34.5kV substation transformer
New transmission taps to new substation transformers
New distribution Feeder installation and area feeder reconfiguration
Area Substations
Little Rest Rd. Shearer’s Corner
Palmer
National Grid Values shown are approximate, for reference purposes of this presentation. Work scope describes the preliminary 35
proposed distribution solution which will be reviewed by the ASO. This solution is subject to change in whole or part
pending the results of the ASO studies. Does not reflect required system modifications for ASOs.Belchertown Area - $14M; 4yrs
Total of 13 applications comprising 32MW
Upgrade Five Corners Substation at existing location:
• Install (1) new 55 MVA 115kV:13.2kV substation transformer
Upgrade Thorndike Substation at existing location:
• Install (1) new 55 MVA 115kV:13.2kV substation transformer
New transmission taps to new substation transformers
New distribution Feeder installation and area feeder reconfiguration
Area Substations
Belchertown Thorndike
Five Corners
National Grid Values shown are approximate, for reference purposes of this presentation. Work scope describes the preliminary 36
proposed distribution solution which will be reviewed by the ASO. This solution is subject to change in whole or part
pending the results of the ASO studies. Does not reflect required system modifications for ASOs.Barre Area - $53M; 4yrs
Total of 13 applications comprising >48MW
Upgrade Barre Substation at existing location:
• Replace (2) existing 12.5MVA and 9.375MVA, 115kV:13.8kV substation transformers with 55MVA units
Install new Substation in Barre (tentatively named Powder Mill):
• Install (1) new 75 MVA 115kV:34.5kV substation transformer
New Transmission taps to new substation transformers
New Distribution Feeder installation and area feeder reconfiguration
Area Substations
Barre Ware
Powder Mill (New)
National Grid Values shown are approximate, for reference purposes of this presentation. Work scope describes the preliminary 37
proposed distribution solution which will be reviewed by the ASO. This solution is subject to change in whole or part
pending the results of the ASO studies. Does not reflect required system modifications for ASOs.MECo Distribution Study Status Summary
Next Steps:
• Continue to collaborate with ASO’s as needed
• Finalize distribution line reconfigurations, load flow, and protective device analyses
• Continue coordination to ensure viable solution
- Constructability
- Operational requirements
- Cost effective
- Maintaining overall safety and reliability
• Commence Detailed Studies after Cluster study has been reviewed and approved by ISO
• Adjust distribution interconnection solutions as needed based on results of ASO study
National Grid 3802
ASO Study Update
Pending/On-Going ASO Studies
GNF/PPA Process
Project Prioritization
National Grid
Will Kern – Customer Energy IntegrationMA Transmission Saturation Due to the stagnant load growth and the increase in DG interconnections on the Distribution System in MA, ISO-NE has a growing concern about the back feed of generation onto the Transmission System. Because of this concern and the desire to operate the Transmission EPS safely and reliably, there has been an increase in the need for Affected System Operator (ASO) studies. Generation thresholds have been communicated to help Massachusetts Electric Company (MECo) identify potential issues and where ASO studies may be required. MECo, New England Power (NEP), and ISO-NE continue to work closely to determine the most expedient path forward for each interconnection project. Due to the DG saturation levels in MA, delays during the study stage of the interconnection process should be expected in all National Grid territories. National Grid 40
Northern (NEMA) ASO Studies
• W Amesbury/Ward Hill (Non-Comprehensive) • Billerica (Non-Comprehensive)
- 27.62MW to be studied and 10 projects - 5.43MW to be studied and 3 projects
- Study/payment status – in progress - Study/payment status – in progress
- Impacted Distribution Substations - Impacted Distribution Substations
◦ W Amesbury ◦ Meadowbrook
◦ King St ◦ Billerica
◦ Newburyport • King St / W. Amesbury (Comprehensive)
◦ Beech St
- 10.98MW to be studied and 3 projects
◦ N Haverhill
- Study/payment status – not commenced
◦ Whittier
- Impacted Distribution Substations
◦ W Newbury
◦ Topsfield
National Grid 41Southern (SEMA) ASO Studies
• Brockton (Non-Comprehensive) • Swansea (Non-Comprehensive)
- 11.39MW to be studied, 4 projects - 7.5MW to be studied and 3 projects
- Study/payment status –commenced - Study/payment status- commenced
- Impacted Distribution Substations - Impacted Distribution Substations
◦ Belmont ◦ Swansea
◦ Easton ◦ Mink St
◦ Mill St • Attleboro/Uxbridge (Non-Comprehensive)
• Dighton (Non-Comprehensive) - 11.61MW to be studied and 5 projects
- 5.37MW to be studied, 2 projects - Study/payment status – commenced
- Study/payment status –commenced - Impacted Distribution Substations
- Impacted Distribution Substations ◦ Depot St
◦ Dighton ◦ S Wrentham
◦ West St
National Grid 42Southern (SEMA) ASO Studies
• Chartley Pond (Non-Comprehensive) • Uxbridge/Whitins Pond (Comprehensive)
- 4.5MW to be studied and 1 projects - 25.15MW to be studied and 7 projects
- Study/payment status - commenced - Study/payment status – commenced
- Impacted Distribution Substations - Impacted Distribution Substations
◦ Chartley Pond ◦ Uxbridge
◦ Whitins Pond
◦ Mendon
National Grid | [Insert document title] | [Insert date] 43Western MA ASO Studies
• Pleasant St (Level TBD) • Fiskdale – (Level TBD)
- 15.51MW to be studied and 6 projects
- 7.998MW to be studied and 2 projects
- Study/payment status
- Study/payment status – in progress
- Impacted Distribution Substations
- Impacted Distribution Substations
◦ Sheffield
◦ Fiskdale
◦ Stockbridge
• Laurel Cir – (Non-Comprehensive)
◦ Risingdale
- 8.85MW to be studied and 2 projects
◦ W.M.E.Co substations
- Study/payment status – not commenced
• Florence Jct (Level TBD)
- Impacted Distribution Substations
- 18.41MW to be studied and 4 projects
◦ Laurel Circle
- Study/payment status
• North Marlboro – (Level TBD)
- Impacted Distribution Substations
- 4.9MW to be studied and 1 projects
◦ Florence Jct (W.M.E.Co substations)
- Study/payment status – not commenced
National Grid 44National Grid GNF/PPA Process*
• For Interconnection applications between 1MW - 5MW
• Screening will review for potential of ASO Study and provide screening memo and Distribution
System Impact Study (DSIS) costs
• At or around 20BD mark, ISO-NE will be contacted and consulted on need for ASO study
- If customer chooses to move forward and pay the DSIS fee
- The Distribution study will continue unless/until the need for ASO study has been determined
◦ This may be identified at screening and the DSIS will go on ASO Hold at this time
• ISO-NE will review the GNF to determine the potential for impact to the Transmission system
• ISO-NE will determine level of study required:
- Level 0,1 – no adverse impact, GNF can progress to RC
◦ Non-comprehensive study may be required as required by ISO-NE – 3-5 month study timeframe
- Level 3 (comprehensive) – 4-6 month study timeframe
- MECo and NEP will group applications if necessary for expediency
- Study will be scoped and ASOs will be engaged by NEP
National Grid 45
*This process subject to change due to MA DPU Docket 19-55National Grid GNF/PPA Process* (continued)
• ASO study fees will be determined (based on level of study requires) and invoiced to the customer
- Will have 20 BD to make ASO study fee payment
- Customer will be requested for any required information to proceed with the ASO study
- If payments are not received on time, the project will be removed from the current ASO study
◦ The project will be given a 1 time, 10 BD opportunity to make payment to reserve inclusion in future ASO studies
◦ Failure to make this payment will result in the application being withdrawn
• ASO Study will commence
• Once ASO study is complete, GNF/PPA will be submitted to the ISO for inclusion on RC agenda
- Customer will be notified if Transmission modifications will be required
• Once GNF/PPA is approved by the RC, the ASO hold will be removed and DSIS will continue
- GNF is considered “approved” once the company receives the approval letter from ISO-NE
• If Transmission modifications are required they will be included in the Interconnection Service Agreement
(ISA)
- These modification will be expected to be completed before the project can interconnect
National Grid 46
*This process subject to change due to MA DPU Docket 19-55GNF/PPA process Update
Implications:
• Earlier notification of potential • Additional time required during
Transmission impacts the study stage
• ISA will include all total (T&D) • Limitation on project changes
cost estimate, scope, and
• Need to update the ISO-NE if a
schedule
project is withdrawn
ASO Study Communications:
• DPU Interim Guidance
- Customer(s) will be notified of need for study as soon as company is made aware
◦ Including: level and expected timeline of study, area/region impacted, # of MW
and applications in the study, and if additional project info is required
- ASO study specific communication bi-weekly until study is kicked-off
- ASO study specific communication monthly once study has started
National Grid • ISA will include total (T&D) cost estimate, scope, and schedule 47Post-ISA Prioritization System
• Has customer paid its full construction advance for system
modifications
• When did the MECo receive customer payment?
• What is the date of the customer’s anticipated authority to
interconnect?
• What stage is the project within the MECo’s construction
process?
• How far along is the customer’s construction (developers may
need to self-certify the responses to these questions)?
- Does customer have all necessary local permits to construct?
- Does customer have site control?
National Grid 48Pre-ISA Prioritization System
• What date was the application deemed complete?
• Has the customer filled out, signed, and returned the Land Use
Certification delivered on November 4th?
- This is not just about “site control”
- This is about project maturity and prioritization.
- The certification is not mandatory
- no projects will be withdrawn if not returned
- More mature projects will be prioritized if opportunities to progress
projects presents during Part 2 of the Cluster Study
National Grid 4903 Data Portal Map Demo National Grid Vishal Ahirrao – Customer Energy Integration
What is the MA System Data Portal?
A new web-based tool that houses a collection of interactive maps
hosted on ARCGIS.
Each map provides the location and specific information for
selected electric distribution lines and associated substations
within the National Grid electric service area in Massachusetts.
Find the MA System Data Portal at the National Grid Project
Guidance Page for Massachusetts:
https://ngus.force.com/s/article/Massachusetts-
System-Data-Portal ( best used in Chrome)
National Grid 51Major Features
• The map sets have been updated on October 25 with CY Electric Grid
Configurations and 2018 Feeder Peaks. 2019 Peaks will be uploaded
Electric Map before End of Year 2019
• National Grid now posts our Annual Reliability Report (ARR) which
Annual Reliability contains much of the information in the MA Portal but in tabular form.
Located in the “Company Reports” tab.
Report
• National Grid has posted a color coded map which highlights Feeders
that are close to their max rating based on 2018 Loads. This can help
Heat Map developers locate NG’s desirable places for interconnection.
• National Grid has posted a DG Hosting Capacity Map which is color
Hosting Capacity coded by Available Hosting Capacity (Under Development). It also
shows aggregate connected and pending DG by Feeder.
Map
• National Grid is also including 3V0 information and aggregate
Substation connected and pending DG of transformer banks on an individual
Feeder level.
Information
National Grid 52Massachusetts Distribution Assets Overview National Grid 53
Massachusetts Heat Map Overview National Grid 54
Massachusetts Hosting Capacity Overview National Grid 55
Stakeholder Involvement
Please reach out to IMAP@NationalGrid.com with any questions or
suggestions for improvement regarding the Portal.
Please contact Non-WiresAlternativeSolutions@NationalGrid.com for
questions regarding NWA and to request to be added to our NWA
Stakeholder distribution list.
National Grid 5604 QUESTIONS?
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