In order to provide energy and/or capacity in New England, new resources need to interconnect to the administered transmission system. Please note that distribution facilities should check with their local transmission owner to see if they are subject to the ISO Interconnection Process. A new resource may be a supply-side generator or an elective transmission upgrade (ETU) as defined in Schedules 22, 23, and 25 of the Open Access Transmission Tariff.
The interconnection process begins as developers are evaluating where they would like to build a new resource or if they would like to modify an existing resource. The following links provide valuable information needed as part of this evaluation process. Note: You will need Critical Energy Infrastructure Information (CEII) Access to view some of the following material.
The ISO New England Interconnection Queue lists the current status of requests for the interconnection of new or uprated (increased capacity) generating facilities in New England, including ETUs and transmission service requests
The ISO studies proposed interconnections to and transmission service over the Administered 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. Studies are typically performed serially in queue order
In certain circumstances, projects can be studied in a Cluster, in accordance with the Clustering provisions in Schedules 22, 23, and 25 of the Open Access Transmission Tariff
Access Interconnection Agreements (IAs) for Generating Facilities and Elective Transmission Upgrades interconnecting to the New England Administered Transmission System as listed in the ISO’s Interconnection Queue
Details the rights and responsibilities of transmission owners and transmission customers, as well as the procedures they must follow and the fees transmission customers must pay to access the transmission system
The ISO performs Economic Study analyses to inform stakeholders about different future systems and assist stakeholders by identifying key regional issues
The ISO’s annual 10-year forecast of capacity, energy, loads, and transmission—a source for planning and reliability study assumption
A comprehensive planning report on system needs and the resource and transmission facilities needed to maintain the reliable operation of New England’s power system over a 10-year horizon, while also accounting for market efficiencies and economic and environmental considerations
Additional Information for Small Generators (≤ 20 MW):
Once you have determined that you intend to build a resource that needs to interconnect to the Administered transmission system, the Interconnection Process Guide will provide you the details needed to do so, as well as other interconnection steps. Requests must be submitted into the Interconnection Request Tracking Tool (IRTT).
For resources participating in the Forward Capacity Market, an interconnection process webinar is available to assist you.
Once a resource has a signed interconnection agreement, and becomes commercial, it may participant in all the New England Markets. Customers who participate in the ISO-administered markets must register their assets with ISO New England for settlement and other market-related purposes.