Washington

Tariff Rules

If you would like to review the rules for Small Generating Facilities please see sections 39-52 of the OATT for processes and regulations.

Link to OATT

DGI-Study-Deposit-Matrix

Application

Interconnection Customer must submit the following for a valid application to receive
a queue number:

original signed application with all applicable fields completed
application deposit $1,000
demonstration of site control
- Specifically, PacifiCorp requires documentation reasonably demonstrating ownership, right to develop, option to purchase, leasehold or an exclusivity or business relationship between the applicant and the person/company owning the property that gives the applicant the right to construct a generating facility on the land. If Interconnection Customer owns the land, the most recent property tax receipt for the location would be an acceptable form of site control.
for those customers who implement a Fast Track study, their application deposit is $500

PDF DGI-Application

PDF Application for Interconnecting a Certified Inverter-Based Small Generating Facility No Larger than 10kW

PDF DGI Application Checklist

Interconnection Customer must submit the following for a valid application to receive
a queue number:

original signed application with all applicable fields completed

application deposit $1,000

demonstration of site control

Specifically, PacifiCorp requires documentation reasonably demonstrating ownership, right to develop, option to purchase, leasehold or an exclusivity or business relationship between the applicant and the person/company owning the property that gives the applicant the right to construct a generating facility on the land. If Interconnection Customer owns the land, the most recent property tax receipt for the location would be an acceptable form of site control.

for those customers who implement a Fast Track study, their application deposit is $500

DGI-Application
PDF

Application for Interconnecting a Certified Inverter-Based Small Generating Facility No Larger than 10kW PDF

DGI Application Checklist

Study Agreements

Fast Track Study

For projects ≤ 2 MW, the customer can request a Fast Track Study. The project must meet certain criteria outlined in section 50.1 of the OATT.

There is no additional study deposit after the initial $500 application fee is submitted.
The study will take fifteen (15) Business Days to complete.
The estimated cost to complete the study is $2,000-5,000. The balance of the study cost will be invoiced / refunded upon completion of the study.

SCOPE:

The company verifies that the Small Generating Facility can be interconnected safely and reliably using the screens contained in the Fast Track Process in the Small Generator Interconnection Procedures (SGIP). Please refer to section 50.2 of the OATT (PDF). The interconnection fast track study will consider base case as well as all generating facilities (and with respect to (iii) below, an identified network upgrades associated with such higher queued interconnection) that, on the date the interconnection fast track study is commenced:

are directly interconnected to the distribution system;
are interconnected to affected systems and may have an impact on the interconnection request;
have a pending higher queued interconnection request to interconnect to the distribution system; and
have no queue position but have executed an DGIA.

Fast Track Study For projects ≤ 2 MW, the customer can request a Fast Track Study. The project must meet certain criteria outlined in section 50.1 of the OATT.

There is no additional study deposit after the initial $500 application fee is submitted.

The study will take fifteen (15) Business Days to complete.

The estimated cost to complete the study is $2,000-5,000. The balance of the study cost will be invoiced / refunded upon completion of the study.

SCOPE: The company verifies that the Small Generating Facility can be interconnected safely and reliably using the screens contained in the Fast Track Process in the Small Generator Interconnection Procedures (SGIP). Please refer to section 50.2 of the OATT (PDF). The interconnection fast track study will consider base case as well as all generating facilities (and with respect to (iii) below, an identified network upgrades associated with such higher queued interconnection) that, on the date the interconnection fast track study is commenced:

are directly interconnected to the distribution system;

are interconnected to affected systems and may have an impact on the interconnection request;

have a pending higher queued interconnection request to interconnect to the distribution system; and

have no queue position but have executed an DGIA.

Standard Study Process

Feasibility Study

The Feasibility Study Report is an optional study the Interconnection Customer can request. The Feasibility Study would be completed prior to the System Impact Study. Should the Interconnection Customer decide to skip this study they would be required to complete the System Impact Study. View OASIS (PDF)

The study deposit is $1,000
The study will take thirty (30) Business Days to complete.
The estimated cost to complete the study is $5,000-10,000. The balance of the study cost will be invoiced / refunded upon completion of the study.

SCOPE:

The interconnection Feasibility Study will consider base case as well as all generating facilities (and with respect to (iii) below, an identified network upgrades associated with such higher queued interconnection) that, on the date the interconnection Feasibility Study is commenced:

are directly interconnected to the distribution system;
are interconnected to affected systems and may have an impact on the interconnection request;
have a pending higher queued interconnection request to interconnect to the distribution system; and
have no queue position but have executed an DGIA.

The interconnection feasibility study report shall provide the following information:

preliminary identification of any circuit breaker short circuit capability limits exceeded as a result of the interconnection;
preliminary identification of any thermal overload or voltage limit violations resulting from the interconnection; and
preliminary description and non-binding estimated cost of facilities required to interconnect the large generating facility to the distribution system and to address the identified short circuit and power flow issues. (PDF)

PDF DGI-FEASA

DGI-FEAS Tech Checklist WIND

DGI-FEAS Tech Checklist Non-WIND

System Impact Study

The System Impact Study is a required study and must be completed prior to the Facility Study and Interconnection Agreement.

The SIS Study deposit is $10,000.
The study will take thirty (30) Business Days to complete.
The estimated cost to complete the study is $7,000-10,000. The balance of the study cost will be invoiced / refunded upon completion of the study.

SCOPE

The interconnection system impact study shall evaluate the impact of the proposed interconnection on the reliability of the distribution system.

The interconnection system impact study will consist of a short circuit analysis, a stability analysis, and a power flow analysis. The interconnection system impact study will state the assumptions upon which it is based; state the results of the analyses; and provide the requirements or potential impediments to providing the requested interconnection service, including preliminary indication of the cost and length of time that would be necessary to correct any problems identified in those analyses and implement the interconnection. The interconnection system impact study will provide a list of facilities that are required as a result of the Interconnection Request and a non-binding good faith estimate of the cost responsibility and a non-binding good faith estimated time to construct. (PDF)

DGI-SISA

DGI-SIS Technical Checklist Wind

DGI-SIS Technical Checklist NON-Wind

Facilities Study

The Facility Study is a required study and must be completed prior to signing the Interconnection Agreement.

The FS Study deposit is $15,000.
The study will take forty-five (45) Business Days to complete.
The estimated cost to complete the study is $10,000-15,000. The balance of the study cost will be invoiced / refunded upon completion of the study.

SCOPE:

The interconnection facilities study will consider base case as well as all generating facilities (and with respect to (iii) below, an identified network upgrades associated with such higher queued interconnection) that, on the date the interconnection facilities study is commenced:

are directly interconnected to the distribution system;
are interconnected to affected systems and may have an impact on the interconnection request;
have a pending higher queued interconnection request to interconnect to the distribution system; and
have no queue position but have executed an DGIA.

The objective of the facilities study is to complete a facilities analysis, which shall specify and estimate the cost of equipment, engineering, procurement, and construction required to address issues as outlined in the system impact study, and shall provide a scope of work and an estimated cost and schedule for completing the scope of work.

DGI-FSA

Feasibility Study The Feasibility Study Report is an optional study the Interconnection Customer can request. The Feasibility Study would be completed prior to the System Impact Study. Should the Interconnection Customer decide to skip this study they would be required to complete the System Impact Study. View OASIS (PDF)

The study deposit is $1,000

The study will take thirty (30) Business Days to complete.

The estimated cost to complete the study is $5,000-10,000. The balance of the study cost will be invoiced / refunded upon completion of the study.

SCOPE: The interconnection Feasibility Study will consider base case as well as all generating facilities (and with respect to (iii) below, an identified network upgrades associated with such higher queued interconnection) that, on the date the interconnection Feasibility Study is commenced:

are directly interconnected to the distribution system;

are interconnected to affected systems and may have an impact on the interconnection request;

have a pending higher queued interconnection request to interconnect to the distribution system; and

have no queue position but have executed an DGIA.

The interconnection feasibility study report shall provide the following information:

preliminary identification of any circuit breaker short circuit capability limits exceeded as a result of the interconnection;

preliminary identification of any thermal overload or voltage limit violations resulting from the interconnection; and

preliminary description and non-binding estimated cost of facilities required to interconnect the large generating facility to the distribution system and to address the identified short circuit and power flow issues. (PDF)

DGI-FEASA

DGI-FEAS Tech Checklist WIND

DGI-FEAS Tech Checklist Non-WIND System Impact Study The System Impact Study is a required study and must be completed prior to the Facility Study and Interconnection Agreement.

The SIS Study deposit is $10,000.

The study will take thirty (30) Business Days to complete.

The estimated cost to complete the study is $7,000-10,000. The balance of the study cost will be invoiced / refunded upon completion of the study.

SCOPE The interconnection system impact study shall evaluate the impact of the proposed interconnection on the reliability of the distribution system. The interconnection system impact study will consist of a short circuit analysis, a stability analysis, and a power flow analysis. The interconnection system impact study will state the assumptions upon which it is based; state the results of the analyses; and provide the requirements or potential impediments to providing the requested interconnection service, including preliminary indication of the cost and length of time that would be necessary to correct any problems identified in those analyses and implement the interconnection. The interconnection system impact study will provide a list of facilities that are required as a result of the Interconnection Request and a non-binding good faith estimate of the cost responsibility and a non-binding good faith estimated time to construct. (PDF) PDF

DGI-SISA

DGI-SIS Technical Checklist Wind

DGI-SIS Technical Checklist NON-Wind Facilities Study The Facility Study is a required study and must be completed prior to signing the Interconnection Agreement.

The FS Study deposit is $15,000.

The study will take forty-five (45) Business Days to complete.

The estimated cost to complete the study is $10,000-15,000. The balance of the study cost will be invoiced / refunded upon completion of the study.

SCOPE: The interconnection facilities study will consider base case as well as all generating facilities (and with respect to (iii) below, an identified network upgrades associated with such higher queued interconnection) that, on the date the interconnection facilities study is commenced:

are directly interconnected to the distribution system;

are interconnected to affected systems and may have an impact on the interconnection request;

have a pending higher queued interconnection request to interconnect to the distribution system; and

have no queue position but have executed an DGIA.

DGI-FSA

Engineering & Procurement

Prior to executing a Small Generator Interconnection Agreement, an Interconnection Customer may, in order to advance the implementation of its interconnection, request and Transmission Provider shall offer the Interconnection Customer, an Engineering and Procurement Agreement that authorizes Transmission Provider to begin engineering and procurement of long lead-time items necessary for the establishment of the interconnection.

PDF DGI-E&PA

DGI-E&PA

Interconnection Agreement

Upon completion of the Facilities Study, and with the agreement of the Interconnection Customer to pay for Interconnection Facilities and Upgrades identified in the Facilities Study, the Transmission Provider shall provide the Interconnection Customer an executable interconnection agreement within five (5) Business Days. See OASIS (PDF)

PDF DGIA

DGIA

Standards

This PacifiCorp Generation Interconnection Policy explains the technical requirements for interconnection of generators to PacifiCorp's distribution power systems. It is based on applicable rules and tariffs crafted by the Federal Energy Regulatory Commission (FERC) and jurisdictional state regulatory agencies. In addition to providing reliability, this policy is consistent with safety requirements for PacifiCorp employees and the general public.

PDF View policy

View policy

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