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  2. Nigerian energy supply crisis - Wikipedia

    en.wikipedia.org/wiki/Nigerian_energy_supply_crisis

    Until the power sector reforms of 2005, power supply and transmission was the sole responsibility of the Nigerian federal government. As of 2012, Nigeria generated approximately 4,000 - 5,000 megawatts of power for a population of 150 million people as compared with Africa's second-largest economy, South Africa, which generated 40,000 megawatts of power for a population of 62 million. [7]

  3. Unit commitment problem in electrical power production

    en.wikipedia.org/wiki/Unit_Commitment_Problem_in...

    The unit commitment problem (UC) in electrical power production is a large family of mathematical optimization problems where the production of a set of electrical generators is coordinated in order to achieve some common target, usually either matching the energy demand at minimum cost or maximizing revenue from electricity production.

  4. Power outage - Wikipedia

    en.wikipedia.org/wiki/Power_outage

    Power outages are categorized into three different phenomena, relating to the duration and effect of the outage: A transient fault is a loss of power typically caused by a fault on a power line, e.g. a short circuit or flashover. Power is automatically restored once the fault is cleared. A brownout is a drop in voltage in an electrical power ...

  5. Power system operations and control - Wikipedia

    en.wikipedia.org/wiki/Power_system_operations...

    The decisions ("economic dispatch") are based on the dispatch curve, where the X-axis constitutes the system power, intervals for the generation units are placed on this axis in the merit order with the interval length corresponding to the maximum power of the unit, Y-axis values represent the marginal cost (per-MWh of electricity, ignoring the ...

  6. Network analysis (electrical circuits) - Wikipedia

    en.wikipedia.org/wiki/Network_analysis...

    The solution principles outlined here also apply to phasor analysis of AC circuits. Two circuits are said to be equivalent with respect to a pair of terminals if the voltage across the terminals and current through the terminals for one network have the same relationship as the voltage and current at the terminals of the other network.

  7. Three utilities problem - Wikipedia

    en.wikipedia.org/wiki/Three_utilities_problem

    The classical mathematical puzzle known as the three utilities problem or sometimes water, gas and electricity asks for non-crossing connections to be drawn between three houses and three utility companies in the plane. When posing it in the early 20th century, Henry Dudeney wrote that it was already an old

  8. Electricity - Wikipedia

    en.wikipedia.org/wiki/Electricity

    Electric power is the rate at which electric energy is transferred by an electric circuit. The SI unit of power is the watt, one joule per second. Electric power, like mechanical power, is the rate of doing work, measured in watts, and represented by the letter P. The term wattage is used colloquially to mean "electric power in watts."

  9. 2000–2001 California electricity crisis - Wikipedia

    en.wikipedia.org/wiki/2000–2001_California...

    The 2000–2001 California electricity crisis, also known as the Western U.S. energy crisis of 2000 and 2001, was a period of time during which the U.S. state of California had a shortage of electricity supply caused by market manipulations and capped retail electricity prices. [10]