New England ISO (ISO-NE)

New England ISO (ISO-NE)
Name	New England ISO (ISO-NE)
Formation	1997
Headquarters	Holyoke, Massachusetts
Region served	Connecticut; Maine; Massachusetts; New Hampshire; Rhode Island; Vermont
Leader title	President and CEO

New England ISO (ISO-NE) is the regional independent system operator responsible for managing the bulk electric transmission system and wholesale electricity markets across six states in the northeastern United States. It operates the high-voltage grid, administers day-ahead and real-time markets, and conducts long-term transmission planning to integrate resources such as natural gas, nuclear, hydroelectric, and increasingly, renewable generation. ISO-NE coordinates with federal agencies, state public utility commissions, and regional stakeholders to balance reliability, market efficiency, and policy objectives.

Overview and Mission

ISO-NE administers the wholesale electricity markets and directs the operation of the regional transmission system serving Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, and Vermont. Its mission aligns with mandates from the Federal Energy Regulatory Commission and collaborative initiatives involving the New England Governors and regional bodies such as the Northeast Power Coordinating Council and the Eastern Interconnection. ISO-NE’s responsibilities intersect with transmission owners like National Grid and Eversource Energy, generation operators including Exelon Corporation and NextEra Energy, and state regulators such as the Massachusetts Department of Public Utilities and the Connecticut Public Utilities Regulatory Authority.

History and Development

ISO-NE evolved from the restructuring of the New England electric power system in the 1990s following policies promulgated by the Federal Energy Regulatory Commission in Orders 888 and 889 and later Order 2000. Its formation built on regional coordination efforts by entities like the New England Power Pool (NEPOOL) and was influenced by national trends exemplified by the establishment of PJM Interconnection and the California Independent System Operator. Key milestones include market launch in 1999, implementation of locational marginal pricing and capacity markets, and the 2000s era integration of transmission planning reforms similar to those pursued by the North American Electric Reliability Corporation and the North American Transmission Forum.

Market Operations and Services

ISO-NE operates competitive wholesale markets including the day-ahead market, real-time energy market, ancillary services, and the Forward Capacity Market established to ensure resource adequacy. Market software and scheduling interface with independent generators such as Dominion Energy, Calpine Corporation, and Dynegy as well as merchant developers and municipal utilities like the Holyoke Gas & Electric Department. ISO-NE’s markets coordinate with regional market monitors and stakeholders including the Independent Market Monitor and state consumer advocates. It administers interconnection studies, tariff provisions under the Federal Power Act, and settlement systems that interact with balancing authorities across the Eastern Interconnection and neighboring entities like ISO New York and New Brunswick Power.

Grid Reliability and Planning

ISO-NE conducts transmission planning via its Regional System Plan and the Regional System Planning Committee, engaging transmission owners, state energy offices, and resource developers. Planning addresses seasonal peak demand, fuel-security risks tied to the regional reliance on natural gas pipelines operated by firms such as Kinder Morgan and Enbridge, and integration of non-dispatchable resources like offshore wind projects proposed by developers including Ørsted and Vineyard Wind. Reliability assessments reference standards from the North American Electric Reliability Corporation and coordinate with neighboring balancing authorities and operators, including New York Independent System Operator and Hydro-Québec TransÉnergie for interconnection and contingency planning.

Governance and Regulation

ISO-NE is governed by a stakeholder framework that includes the NEPOOL Participants Committee and a Board of Directors responsible for corporate oversight. Regulatory authority rests with the Federal Energy Regulatory Commission under the Federal Power Act, while state public utility commissions in Massachusetts, Connecticut, Rhode Island, Maine, New Hampshire, and Vermont shape resource and policy direction through integrated resource planning and procurement rules. ISO-NE’s tariff filings, market rules, and planning proposals undergo review and approval processes at FERC and frequent litigation and settlements involving entities like Entergy Corporation and state attorneys general.

Controversies and Criticisms

ISO-NE has faced controversy over market design choices such as the Forward Capacity Market, which drew scrutiny from resource owners including Nuclear Energy Institute supporters and state officials debating capacity market exemptions for retained nuclear units like Pilgrim Nuclear Power Station and Vermont Yankee. Critics have highlighted market outcomes linked to fuel-security issues during cold snaps, invoking comparisons to events like the 2014 polar vortex and leading to debates with pipeline companies and state policymakers. Legal and political disputes have involved FERC proceedings, state-sponsored procurement efforts in Massachusetts and Connecticut to subsidize specific resources, and concerns raised by environmental advocates and utilities about transmission siting, renewable interconnection queues, and cost allocation practices overseen by ISO-NE.

Category:Electric power transmission in the United States Category:Independent system operators in the United States