Attachment A to Appendix 1 Application for Interconnection

Applicant's Legal Name*

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Name of Project*

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Gross Generating Facility Capability (at Inverter Terminals):*

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1. Simplified One-Line Diagram

Typical solar interconnection arrangement: (for illustration purpose only)

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Other equipment, including battery and location, if applicable, not shown.

One-Line Diagram of Interconnection Customer’s proposed generator is attached.

Attached

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2. Solar Panel and Inverter Data

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Battery Location, if applicable, not shown.

Solar Panel Data

Manufacturer:*

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Model Name:*

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Model No.*

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Model Version:*

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No. of Solar Panels:*

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Type of photovoltaic system (Fixed or Tracked):*

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Provide a summary of solar panel electrical data.

Attached

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Expected monthly peak generation profile.

Attached

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Inverter Data

Manufacturer:*

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Model Name:*

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Model No.*

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Model Version:*

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No. of Inverters:*

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Nominal Voltage:*

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Nameplate Rating:*

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Describe inverter reactive capability: *

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Inverter short circuit ratio limit:*

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Provide the inverter specification sheet with reactive capability curve.

Attached

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Battery and Inverter Data

Description Battery interconnection:*

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Manufacturer:*

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Model Name:*

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Model No.*

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Model Version:*

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No. of Inverters:*

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Nominal Voltage:*

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Nameplate Rating:*

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Describe inverter reactive capability: *

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Inverter short circuit ratio limit:*

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Provide the inverter specification sheet with reactive capability curve.

Attached

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Maximum Charge Rate: *

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Maximum Storage: *

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3. Inverter Step-Up Transformer

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Number of inverter step-up transformers:*

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Provide data for either two-winding or three-winding transformer as appropriate

Two-Winding Inverter Step-Up Transformer Data (as applicable):

Nameplate Rating:*

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Maximum Rating (if applicable):*

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Nominal Voltage for each winding (Low/High):*

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Winding Connections (Low/High) Delta or Wye:*

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Available taps:*

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Load or no-load tap changer and location of tap changer:*

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Positive sequence impedance (Z1):*

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Zero sequence impedance (Z0) *

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Three-Winding Inverter Step-Up Transformer Data (as applicable)

GSU connection and winding (attach diagram and mark to reference this form).

H Winding Data

Nameplate ratings (i.e. OA/FA/FA)

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Rated winding voltage base

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Tap positions available

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Present Tap Setting (if applicable)

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Solid or impedance grounding

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BIL rating

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X Winding Data

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Applicant's Legal Name:

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Y Winding Data

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Three-Winding Inverter Step-Up Transformer Impedance Data (as applicable)

H-X Winding Data

Transformer Per-unit base

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Positive sequence impedance Z1

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Zero sequence impedance Z0

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H-Y Winding Data

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X-Y Winding Data

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4. Collector System Equivalent Model

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Provide either absolute or per unit impedance values.

Collector System Voltage:

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Total Length of Collector System:

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Overhead or Underground Construction:

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Collector system equivalent model rating at 0°C/20°C/30°C/40°C/50°C ambient:

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R1

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X1

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B1

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X0

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B0

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5. Station Reactive Compensation Devices (if applicable)

(This describes devices beyond the inverters built-in reactive capability)

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Type of Reactive Compensation Device(s) (Fixed or Dynamic):

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Individual Fixed Shunt Reactive Device Type:

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No. and size of each:

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Dynamic reactive control device (e.g., SVC, STATCOM):

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Control range at rated MW output:

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Control Mode:

Voltage, maintained within Grant PUD’svoltage schedule

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Regulation Point:

High side of main station transformer

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Describe the overall reactive power control strategy:

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6. Main Station Transformer

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Number of main transformers:

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Provide data for either two-winding or three-winding transformer as appropriate.

Two-Winding Main Transformer Data (as applicable)

Nameplate Rating (OA/FA/FA):

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Nominal Voltage for Each Winding (Low/High):

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Winding Connections (Low/High) Delta or Wye:

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Available tap positions:

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Load or no-load tap changer and location of tap changer:

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Positive sequence impedance (Z1):

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Zero sequence impedance (Z0)

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Three-Winding Main Transformer Data (as applicable)

GSU connection and winding (attach diagram and mark to reference this form).

H Winding Data

Full load ratings (i.e. OA/FA/FA)

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Rated winding voltage base

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Tap positions available

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Present Tap Setting (if applicable)

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Solid or impedance grounding

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BIL rating

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X Winding Data

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Y Winding Data

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Three-Winding Inverter Step-Up Transformer Impedance Data (as applicable)

H-X Winding Data

Transformer Per-unit base

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Positive sequence impedance Z1

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Zero sequence impedance Z0

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H-Y Winding Data

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X-Y Winding Data

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7. Generator Interconnection Tie Line

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Provide either absolute or per unit impedance values.

Point of Interconnection (utility station/line name):

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Line Voltage:

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Line Length:

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Overhead or Underground Construction:

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Line rating at 0°C/20°C/30°C/40°C/50°C ambient:

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R1

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B1

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R0

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X0

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B0

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8. Dynamic Modeling Data

Provide with this form the WECC approved (and if applicable, recommended) standard dynamic models for generation facilities, including any additional dynamic reactive control devices.

Models Attached, including the power system model in a text-editable format.
Include plant volt/var control function model and active power/frequency control function model.
All the associated files for dynamic modeling should be in a format consistent with NERC’s Reliability Guidelines (BPS--Connected Inverter-Based Resource Performance), the document produced by NERC by this title, or its Standard Large Generator Interconnection Procedures 8 Rev 1, Anticipated Effective Date 06/22/2026 successor document, which contain guidelines for the operation of invertor-based resources. The files must be shareable on an interconnection-wide basis to support use in the interconnection-wide cases.
Model parameters for inverters shall include:
- Voltage response and ride-thru settings.
- Frequency response and ride-thru settings.
- Control mode (voltage control for POI >100 kV, power factor control for POI < 100 kV).
- Any plant-level real power limits

Grant PUD requires the solar installation to align with the recommended performance characteristics and other recommendations related to inverter-based resource performance, analysis, and modeling as identified by NERC’s Inverter-Based Resource Performance Joint Task Force and to conform to all NERC requirements.

9. Data Revision

If submitting revised data, record the date and a summary of the sections that have been updated:

Date

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Revision Summary

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