Access ISO studies evaluating proposed interconnections to and transmission service over the New England transmission system for projects listed in the ISO’s Interconnection Queue. The studies are performed to ensure that system reliability criteria and standards for no adverse impact are met. They typically consist of thermal, voltage, stability, and short-circuit analyses, and include studies related to:
Projects listed in the ISO’s Interconnection Queue are studied as a Cluster of projects associated with Interconnection Requests submitted during the related Cluster Request Window. Prior to April 4, 2025, projects were studied serially. The study reports for projects that have been studied in a Cluster or serially can be found below.
In certain circumstances, projects can be supported by a Cluster Enabling Transmission Upgrade (“CETU”) identified by a Cluster Enabling Transmission Upgrade Regional Planning Study (“CRPS”) in accordance with the CETU provisions in Schedules 22, 23, and 25 of the Open Access Transmission Tariff. Additional information on the CETU process can be found on the CETU Supported Projects page.
Some materials in this section contain CEII. Your browser cannot access them without the ISO’s prior approval. If you are not a market participant and wish to access this material, you will need to complete and submit a CEII Access Request Form in Ask ISO and receive the ISO’s approval. If you are a market participant and wish to access this material, contact your organization’s security administrator (SA) for the ISO’s Customer and Asset Management System (CAMS). Your SA must enter your name into the CAMS database and assign you the necessary roles and permissions. For further information, see the Request CEII Access page.
