The maximum load during a specified period of time. A naturally occurring, oily, flammable liquid composed mostly of hydrocarbons. Crude oil is occasionally found in springs or pools, but usually is drilled from wells beneath the earth's surface. The engine, turbine, water wheel, or similar machine that drives an electric generator. An energy source that is regenerative or virtually inexhaustible.
Typical examples are wind, geothermal and water power.
The shutdown of a generating unit, transmission line, or other facility, for inspection or maintenance, in accordance with an advance schedule. Substations are like interchanges on interstate highways or intersections on city streets, depending on the voltages involved and the amount of power passing through them. Enclosed by fences, substations contain transformers, switches, circuit breakers and other devices used to control and direct the flow of electric power through the energy delivery grid. Sulfur dioxide is a product of fossil fuel combustion, such as the burning of oil or coal. Small amounts of sulfur contained in the fuel is converted into sulfur dioxide in the combustion process.