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Gas Supply Charge
Reflects the actual costs of purchasing, transporting and storing natural gas.
Gas Turbine Plant
A plant in which the prime mover is a gas turbine. A gas turbine typically consists of an axial-flow compressor which feeds compressed air into one or more combustion chambers where liquid or gaseous fuel is burned. The resulting hot gasses are expanded through the turbine, causing it to rotate. The rotating turbine shaft drives the compressors as well as the generator, producing electricity.
Gasification
Any of various processes by which coal is turned into natural gas.
Gas-Reserves
Natural gas in natural underground formation in wells, fields or pools.
Generating Company (GENCO)
A Company that is solely engaged in the generation of electricity.
Generation
The process of producing electric energy by transforming other forms of energy such as steam, heat or falling water. Also, the amount of electric energy produced, expressed in kilowatt-hours (kWh) or megawatt-hours (mWh).
Generation Company (Genco)
A regulated or non-regulated entity (depending upon the industry structure) that operates and maintains existing generating plants. The Genco may own the generation plants or interact with the short-term market on behalf of plant owners.
Generator
A machine that converts mechanical energy into electrical energy. Generally rated in terms of real power (megawatts) and reactive power (Megavars) output or in terms or real power output (megawatts) and power factor. Generators require a source of mechanical energy input (typically a turbine) and ancillary equipment to interface with the transmission network. Also, a person firm that operates a generator.
Geothermal
Power generated from heat energy derived from hot rock, hot water or steam below the earth's surface.
Geothermal Plant
A plant in which the prime mover is a steam turbine, driven either by steam produced from hot water or by natural steam that derives its energy from heat found in rocks or fluids at various depths beneath the surface of the earth. The energy is extracted by drilling and/or pumping.
Gigawatt (GW)
One billion watts.
Gigawatt-hour (GWh)
One billion watt-hours.
Global Warming
An increase in the near surface temperature of the Earth. Global warming is most often used to refer to the warming predicted to occur as a result of increased emissions of greenhouse gases. Scientists generally agree that the Earth's surface has warmed by about
one degree Fahrenheit in the past 140 years.
Globalization
Accelerating trend that is creating greater access and exposure to opportunities, values, and products while also bringing threats such as increasing worldwide social and environmental destruction.
Greenfield Development
Development of a new power generating facility.
Greenhouse Effect
The increasing mean global surface temperature of the earth believed to be caused by gasses in the atmosphere (including carbon dioxide, methane, nitrous oxide, ozone and chlorofluorocarbon). The greenhouse effect allows solar radiation to penetrate but absorbs the infrared radiation returning to space.
Greenhouse Gas (GHG)
Any of the gases whose absorption of solar radiation is responsible for the greenhouse effect, including carbon dioxide, methane, ozone, and the fluorocarbons.
Greenhouse Gas Emissions
The emitting of greenhouse gasses from various sources including, but not limited to, the creation and burning of fossil fuels, agricultural and industrial processes, and/or the breakdown of organic waste.
Grid
The layout of the electrical transmission system or a synchronized transmission network of interconnected power lines and generators that is managed so that the generators are dispatched as needed to meet the requirements of the customers connected to the grid at various points.
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