Grid Glossary

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Inverter

Technology that provides the interface between the grid and energy sources like solar panels, wind turbines, and energy storage, converting direct current to alternating current (which is how electricity is delivered in the United States). It is used to convert power output from solar cells, batteries, and wind turbines into power that can be injected into the grid.

Inverter-Based Resources (IBR)

A power generation or storage device (such as a battery) that connects to the electrical grid through an inverter, a power electronic device that converts direct current (DC) to alternating current (AC). These resources, including solar photovoltaic (PV) systems, wind turbines, and battery energy storage systems, are increasingly important for grid stability.

ISO-NE

ISO New England

Siting requirements

For electricity infrastructure, like power lines and generating facilities, these requirements involve a range of considerations, including safety, environmental impact, and community engagement. Specific regulations vary by location and project type, but generally include distance requirements from existing infrastructure, environmental assessments, and engagement with landowners and stakeholders.

Solar power

The conversion of sunlight into electricity using photovoltaics (PV) or solar thermal technologies. It’s a renewable energy source that is becoming increasingly important in the global energy landscape due to its sustainability and decreasing costs.

Spot Price

Refers to the real-time wholesale cost of electricity that fluctuates based on supply, demand, weather, and grid conditions.

SPP

Southwest Power Pool

Synchronous resources

Generators with turbines rotating in sync with the grid frequency. They include large-scale thermal (coal and gas) and hydropower plants.

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