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Electric Transmission


Our electric transmission system — more that 4,000 miles of overhead and underground high-voltage wires and substations — plays an essential role in connecting customers across New England with reliable, affordable power.  

The power grid is undergoing significant change to achieve carbon reduction targets outlined in state and regional policies, and help us achieve our own goal to have carbon-neutral operations by 2030.

The power grid is the interconnected network that delivers electricity from where it’s generated to where it's consumed.

We continue to ensure the grid is ready to meet an increase in demand from electrification, while also making significant investments that enable our transmission system to integrate clean energy resources and better withstand the increasingly extreme weather events and other issues associated with climate change.

Investments in the power grid have three key benefits:

Reliability: The ability to meet the electric demand and energy requirements of customers at all times
Resiliency: The ability to harden the power grid to prevent damage from extreme weather and other disasters
Clean Energy: Connecting a growing number of clean resources to the grid and ensuring we’re ready to meet an increased electric demand

A strong, well-connected transmission network delivers power from the point of generation to where it's most needed and can allow for an optimized mix of energy sources.

While this power has traditionally flowed in one direction from power plants to homes and businesses, in the modern electric grid, power flows in multiple directions — from clean energy resources both large (solar and wind farms) and small (rooftop solar panels and home batteries). 

These resources will grow dramatically over the next several decades in conjunction with the electrification of the heating and transportation sectors.

To seamlessly connect clean energy resources to the grid, we are focused on maintaining a robust transmission system that is affordable, reliable, efficient, flexible and increasingly automated, while also being resilient to damage from extreme weather.

We invested approximately $1 billion in the electric transmission system in 2021. These investments have resulted in strong reliability and safety performance, improved resiliency, supported economic growth, and the integration of more renewable energy in the region.