Generator Interconnection Studies

Generator Interconnection Studies and Procedures

MISO provides safe, reliable, equal and non-discriminatory access to the electric transmission system for generator interconnection projects. We are committed to helping current and future interconnection customers navigate the interconnection study process.

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Studies and Analyses

Once you have submitted a complete application for generator interconnection, your request will enter MISO's queue. The queue process includes the following studies and analyses.

GI Application and DPP Readiness

Get step-by-step guidance for making a generator interconnection request and completing the application. Start by downloading these quick-reference documents.

GI Process Flow Diagram

Attachment X and BPM 015 Reference Guide

GI Application Checklist

Definitive Planning Phase

Definitive Planning Phase (DPP)

Within the DPP, there are three phases and two Decision Points; however, customers must provide M1 and M2 milestones and D1 and D2 study deposits no later than the application deadline published on the Transmission Provider website. MISO will utilize reasonable efforts to complete the DPP System Impact studies and the Facility study in ~355 calendar days.

Phase 1
Preliminary SIS, Decision Point 1. Estimated time of completion for these studies is 140 days.
Phase 2
Revised DPP SIS and Interconnection Facilities FS, Decision Point 2. Estimated time of completion for these studies is 80 days.
Phase 3
Final DPP SIS and Network Upgrade Facilities Study. Estimated time of completion for these studies is 135 days.
Generator Interconnection Agreement (GIA)
Facilities Study review. Tender Draft GIA, IC/TO Execute GIA. Estimated time of completion is 150 days. Upon receiving the final GIA, customers must provide the following milestones:

Evidence of achieving one or more pro forma
Appendix B milestones in Attachment X of the Tariff
Initial GIA milestone payment to the transmission owner within thirty calendar days
Reasonable evidence of continued site control

Optional Studies

You may request an optional study to get sensitivity analysis and cost estimates for providing transmission service or interconnection service. The study will identify all of a transmission owner’s interconnection facilities, system protection facilities, distribution upgrades, generator upgrades, common-use upgrades and network upgrades.

MISO conducts optional studies in parallel with interconnection requests or on a stand-alone basis. To initiate an optional study, please provide MISO with:

The Optional Interconnection Study Agreement (pdf). See Appendix 5.
A deposit of $60,000 made out to MISO.

Provisional Studies

You may request a Provisional Study for Interconnection Request submission through Interconnection Customer Decision Point II or at any time the Interconnection Facility Study for Network Upgrades becomes delayed by more than 60 calendar days. (see PGIA study application form)

MISO conducts Provisional Studies to offer conditional ERIS to the customer prior to the completion on the Network Upgrades.

A deposit of $8,000 per MW studied for M3 and M4 submitted to MISO is required.