Atomic Energy of Canada Limited
Affiliated Power Producer
A company that generates power and is affiliated with a utility.
Alternating Current (AC)
A current that flows alternately in one direction and then in the reverse direction. In North America, the standard for alternating current is 60 complete cycles each second. Such electricity is said to have a frequency of 60 hertz. Alternating current is used in power systems because it can be transmitted and distributed more economically than direct current.
The minimum continuous load over a given period of time. Base load generating stations operate essentially at full output whenever possible.
British Thermal Unit (Btu)
A unit of heat. The quantity of heat required to raise the temperature
of one pound of water by one degree Fahrenheit.
Large amounts of electric power at transmission voltages, generally to run industrial plants and operations.
Combining the costs of generation, transmission and distribution and other services into a single rate charged to the retail customer.
Canadian Deuterium Uranium.
In the electric power industry, capacity has two meanings:
1. System Capacity: The maximum power capability of a system.
For example, a utility system might have a rated capacity of 5000 megawatts, or might sell 50 megawatts of capacity.
2. Equipment Capacity: The maximum power capability of piece of equipment. For example, a generating unit might have a rated capacity of 50 megawatts.
For any equipment, the ratio of the average load during a defined time period to the rated capacity.
Canadian Electricity Association.
International Conference on Large High Voltage Electric Systems.
Canadian Nuclear Association.
The simultaneous production of power and thermal energy.
Such systems have great potential in industry, where a significant requirement for electricity is coupled with a large demand for process steam.
Use of electrical energy, typically measured in kilowatt hours.
Electricity that is produced at a generating station where the prime movers are driven by gases or steam produced by burning fossil fuels.
Polling of resources, loads and/or joint reservoir management between utilities to allow more efficient operation of existing dams and reservoirs.
The flow of electricity in a conductor. Current is measured in amperes.
The component of a two-part price for electricity that is based on
a customer's highest power demand reached in a specified period, usually a month, regardless of the quantity of energy used (e.g., $2.00 per kilowatt per month). The other component of the two-part price is the energy charge.
A producer agrees to make generating capacity available to a buyer when it is called upon or 'demanded'.
Direct Current (DC)
Current that flows continuously in the same direction (as opposed to alternating current). The current supplied from a battery is direct current.
Energy sold by one power system to another, to effect a saving in the cost of generating when the receiving party has adequate capacity to supply the loads from its own system.
A process allowing members of a power pool to buy and sell excess energy amongst themselves to maximize the efficiency of generation and transmission facilities.
Edison Electric Institute
Associatio of investor-owned utilities in the U.S. Foreign and non-investor utilities can join as affiliate members.
The quantity of electricity delivered over a period of time. The commonly used unit of electrical energy is the kilowatt-hour (kWh).
The rate of delivery of electrical energy and the most frequently used measure of capacity. The basic unit is the kilowatt (kW).
The component of a two-part price for electricity which is based on the amount of energy taken (e.g, 20 mills per kWh). The other component of the price is the demand charge.
An agreement by a selling utility to provide a buyer with a designated amount of electricity over a definite period of time.
The primary source that provides the power that is converted to electricity. Energy sources include coal, petroleum and petroleum products, gas, water, uranium, wind, sunlight, geothermal, and other sources.
Any alteration to the environment caused by man and affecting human, animal, fish and/or plant life.
Electric power Research Institute (U.S.A.).
The transfer and return of electricity from one utility to another at different time periods or seasons to achieve a more economic or efficient overall system operation. Such transfers are possible because of differences in electricity demand, generation resource capability or system operating characteristics.
Extra High Voltage (EHV)
Any transmission voltage higher than 345 kV.
Firm Energy or Power
Electrical energy or power intended to be available at all times during the period of the agreement for its sale.
Federal Energy Regulatory Commission (U.S.A.)
The number of cycles through which an alternating current passes in a second. The North American standard is 60 cycles per second, known as 60 hertz.
One billion watts. (see Watt)
Gigawatt hour (GW.h)
A unit of bulk energy. One million kilowatt hours. One billion watt hours.
The process of converting thermal, mechanical, chemical or nuclear energy into electric energy.
A network of electric power lines and connections.
Gross Domestic Product (GDP)
The total value of goods and services produced in Canada. GDP measured in constant dollars is defined as Real GDP.
Gross National Product (GNP)
The total value of production of goods and services measured at market prices.
The unit of frequency for alternating current. Formerly called cycles per second. The standard frequency for power supply in North America is 60 Hz.
International Energy Agency.
Integrated Gasification Combined Cycle.
Independent System Operator.
The capacity measured at the output terminals of all the gene-rating units in a station, without deducting station service requirements.
A system consisting of two or more individual power systems connected together by tie lines.
Interruptible Energy or Power
Energy or power made available under an agreement that permits curtailment or interruption of delivery at the option of the supplier.
Intertie (Interutility Tieline)
Transmission circuit used to tie or inter-connect two load areas of two utility systems.
Investor Owned Utility (IOU)
Utility that is structured as a tax-paying business financed through sales of common stock.
Independent Power Producer (IPP)
A privately owned power generating facility which may be connected to a utility system to supply electricity for domestic or export markets.
Institut de Recherche d'Hydro-Québec
The international unit of energy. The energy produced by a power of one watt flowing for one second. The joule is a very small unit: there are 3.6 million joules in a kilowatt hour.
The commercial unit of electric power; 1000 watts. A kilowatt can best be visualized as the total amount of power needed to light ten 100 watt light bulbs.
Kilowatt hour (kWh)
The commercial unit of electric energy; 1000 watt hours. A kilowatt hour can best be visualized as the amount of electricity consumed by ten 100-watt light bulbs burning for an hour. One kilowatt hour is equal to 3.6 million joules.
The total amount of electricity required to meet customer demand at any moment. The load equation fluctuates depending on electricity use throughout any given day.
The ratio of the average load during a designated period to the peak or maximum load in that same period. Usually expressed in per cent.
The anticipated amount of electricity required by customers
in the future.
One thousand cubic feet.
One million cubic feet.
Municipal Electric Association.
A unit of bulk power; 1000 kilowatts.
Megawatt hour (MW.h)
A unit of bulk energy; 1000 kilowatt hours
1/1000 of a dollar.
National Energy Board.
North American Electric Reliability Council.
Total exports minus total imports.
Non-utility Generator (NUG)
An electricity producer which does not have a mandate or obligation to supply electricity to the public.
National Research Council.
Power generated at a station where the steam to drive the turbines is produced by an atomic process, rather than by burning a combustible fuel such as coal, oil or gas.
The maximum power demand registered by a customer or a group of customers or a system in a stated period of time. The value may be the maximum instantaneous load or more, usually the average load over a designated interval of time, such as one hour, and is normally stated in kilowatt or megawatts.
The maximum power demand registered by a customer or a group of customers or a system in a stated period of time. The value may be the maximum instantaneous load or more, usually the average load over a designated interval of time, such as one hour, and is normally stated in kilowatts or megawatts.
The rate of doing work. Electric power is measured in watts.
Two or more interconnected electric systems that coordinate planning and maintenance and supply power reliably and economically to meet their combined load requirements.
A company that buys and resells power.
The interconnected facilities of an electrical utility. A power system includes the generation, transmission, distribution, transformation, and protective components necessary to provide service.
Reserve Generating Capacity
The extra generating capacity required on any power system over and above the expected peak load. Such a reserve is required mainly for two reasons: (i) in case of an unexpected breakdown of generating equipment; (ii) in case the actual peak load is higher than forecast.
Secondary Energy Consumption
The amount of energy available to, and used by, the consumer in its final form.
Generation of electricity by a customer for their own use.
Short Term Trade
Electricity trade of varying duration that involves only surplus electricity from existing generating and transmission facilities.
Utility assets that would lose value in a competitive market.
TerraWatt Hours (TW.h)
One billion kilowatt hours.
An electromagnetic device for changing the voltage of alternating electricity.
The process of transporting electric energy in bulk on high
voltage lines from the generating facility to the local distribution company for delivery to retail customers.
The separate pricing and provision of electricity service independent of equipment cost or charge.
Separating electric generation, transmission and distribution functions of a utility into separate companies.
The electrical force or potential that causes a current to flow in a circuit (just as pressure causes water to flow in a pipe). Voltage is measured in volts (V) or kilovolts (kV). 1 kV = 1000 V.
The scientific unit of electric power; a rate of doing work at the rate of one joule per second. A typical light bulb is rated 25, 40, 60 or 100 watts. A horse power is 746 watts.
World Energy Council.
The transmission of electric energy generated by one party to another using the transmission system of a third party. The wheeler does not own, generate or purchase the electricity being transported.