Grid Glossary

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Energy-only interconnection approaches

Connecting new generation to the grid with minimal transmission upgrades and managing impacts through operational strategies rather than extensive upfront infrastructure investments. This approach, often referred to as “connect and manage,” prioritizes adding generation capacity quickly while relying on the grid operator to manage any resulting operational constraints. It requires new resources to risk curtailment (where the generator is asked to stop supplying power to the grid when supply is too high). The process has allowed Texas’ ERCOT to connect record numbers of new clean projects in the last several years significantly faster than other regions. 

ERCOT

The Electric Reliability Council of Texas serves as an independent system operator (ISO), managing the flow of electrical power over transmission infrastructure in the state of Texas.

Essential reliability services

A combination of automated and manual controls grid operators adjust to maintain grid reliability by ensuring a balance between supply (generation) and demand (load). They generally consist of three main aspects:

  • frequency response – short-term adjustments to maintain the grid’s oscillations at 60 hz)
  • balancing – related to frequency response but on longer time frames, to, for e.g., plan for energy resource outages due to maintenance, and 
  • voltage control – involves magnetic waves to allow for the movement of watts of energy
Watts

Measure of the rate of energy transfer over a unit of time, with one watt equal to one joule (J) per second.

Wind power

A form of renewable energy that uses the kinetic energy of wind to generate electricity. It involves capturing the wind’s energy through turbines, which then convert this mechanical energy into electricity. Modern wind power generation primarily relies on wind turbines, often grouped into wind farms, connected to the electrical grid.

Winter peaking

The increase in energy demand during the winter months, usually due to heating needs. This can lead to higher energy prices and bills for a number of reasons, including: 

  • Strained energy grid: The high demand can strain the energy grid, which can cause utilities to work harder to meet the need.
  • Seasonal rate adjustments: Many energy providers adjust rates based on seasonal demand.
  • Increased use of lighting: Shorter and darker winter days can lead to greater use of in-home lighting.

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