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IEEE Medal in Power Engineering

The IEEE Medal in Power Engineering was created by the Board of Directors of the Institute of Electrical and Electronics Engineers in 2008, and presented for the first time in 2010. This award is given to an individual with outstanding contributi ...

Intelligent electronic device

An Intelligent Electronic Device is a term used in the electric power industry to describe microprocessor-based controllers of power system equipment, such as circuit breakers, transformers and capacitor banks.

Intelligent hybrid inverter

An intelligent hybrid inverter or smart grid inverter is a trending generation of inverter for solar applications using renewable energy for home consumption, especially for solar photovoltaic installations. Some see this as a new technology, how ...

Islanding

Islanding is the condition in which a distributed generator continues to power a location even though electrical grid power is no longer present. Islanding can be dangerous to utility workers, who may not realize that a circuit is still powered, ...

Milliwatt hour

The kilowatt-hour is a unit of energy equal to 3600 kilojoules. The kilowatt-hour is commonly used as a billing unit for energy delivered to consumers by electric utilities.

Kron reduction

In power engineering, Kron reduction is a method used to reduce or eliminate the desired node without need of repeating the steps like in Gaussian elimination. It is named after American electrical engineer Gabriel Kron.

Leading and lagging current

Leading and lagging current are phenomena that occur as a result of alternating current. In a circuit with alternating current, the value of voltage and current vary sinusoidally. In this type of circuit, the terms lead, lag, and in phase are use ...

Lineworker

A lineworker, linesman, powerline technician, or powerline worker) is a tradesman who constructs and maintains electric power transmission, telecommunications lines and distribution lines. A lineworker generally does outdoor installation and main ...

Liquid resistor

A liquid resistor is an electrical resistor in which the resistive element is a liquid. Fixed-value liquid resistors are typically used where very high power dissipation is required. They are used in the rotor circuits of large slip ring inductio ...

Liquid rheostat

A liquid rheostat or water rheostat or salt water rheostat is a type of variable resistor. This may be used as a dummy load or as a starting resistor for large slip ring motors. In the simplest form it consists of a tank containing brine or other ...

Live-line working

In electrical engineering, live-line working, also known as hotline maintenance, is the maintenance of electrical equipment, often operating at high voltage, while the equipment is energised. Although this is more hazardous for personnel than wor ...

Load bank

A load bank is a device which develops an electrical load, applies the load to an electrical power source and converts or dissipates the resultant power output of the source. A load bank includes load elements with protection, control, metering a ...

Load duration curve

A load duration curve is used in electric power generation to illustrate the relationship between generating capacity requirements and capacity utilization. A LDC is similar to a load curve but the demand data is ordered in descending order of ma ...

Load profile

In electrical engineering, a load profile is a graph of the variation in the electrical load versus time. A load profile will vary according to customer type, temperature and holiday seasons. Power producers use this information to plan how much ...

Losses in electrical systems

In an electrical or electronic circuit or power system part of the energy in play is dissipated by unwanted effects, including energy lost by unwanted heating of resistive components, the effect of parasitic elements, skin effect, losses in the w ...

Low voltage ride through

In electrical power engineering, fault ride through, sometimes under-voltage ride through, or low voltage ride through, is the capability of electric generators to stay connected in short periods of lower electric network voltage. It is needed at ...

Low-power electronics

When personal computers were first developed, power consumption was not an issue. Soon after though, development of portable computers started, and with it, the requirement to run a computer off a battery pack, setting off the search for a compro ...

Luna Ring

Luna Ring is a speculative engineering project which consists in a series of solar generators, disposed around the equator of the Moon, that could send the generated electric energy back to the Earth via microwaves from the near side of the Moon. ...

MAIFI

The Momentary Average Interruption Frequency Index is a reliability indicator used by electric power utilities. MAIFI is the average number of momentary interruptions that a customer would experience during a given period. Electric power utilitie ...

Mains electricity

Mains electricity is the general-purpose alternating-current electric power supply. It is the form of electrical power that is delivered to homes and businesses, and it is the form of electrical power that consumers use when they plug items such ...

Mains electricity by country

Mains electricity by country includes a list of countries and territories, with the plugs, voltages and frequencies they commonly use for providing electrical power to appliances, equipment, and lighting typically found in homes and offices. Some ...

Microbial electrolysis cell

A microbial electrolysis cell is a technology related to Microbial fuel cells. Whilst MFCs produce an electric current from the microbial decomposition of organic compounds, MECs partially reverse the process to generate hydrogen or methane from ...

Microbial electrosynthesis

Microbial electrosynthesis is a form of microbial electrocatalysis in which electrons are supplied to living microorganisms via a cathode in an electrochemical cell by applying an electric current. The electrons are then used by the microorganism ...

Miscellaneous electric load

Miscellaneous electric loads in buildings are electric loads resulting from electronic devices not responsible for space heating, cooling, water heating, or lighting. MELs are produced by hard-wired and" plug-in” electrical devices, including hom ...

Multipoint ground

A multipoint ground is an alternate type of electrical installation that attempts to solve the ground loop and mains hum problem by creating many alternate paths for electrical energy to find its way back to ground. The distinguishing characteris ...

MultiSpeak

MultiSpeak is a specification / standard that defines standardized interfaces among software applications commonly used by electric utilities. It defines details of data that need to be exchanged between software applications in order to support ...

No load power

No load power consumption is the electric power consumed by a battery charger when it is plugged into a wall socket but without the mobile phone or other battery device being connected. Contrary to standby power, which is a low power mode of devi ...

Nodal admittance matrix

In power engineering, nodal admittance matrix or Y Matrix or Ybus is an N x N matrix describing a power system with N buses. It represents the nodal admittance of the buses in a power system. In realistic systems which contain thousands of buses, ...

Off-the-grid

Off-the-grid or off-grid is a characteristic of buildings and a lifestyle designed in an independent manner without reliance on one or more public utilities. The term "off-the-grid" traditionally refers to not being connected to the electrical gr ...

One Watt Initiative

The One Watt Initiative is an energy-saving initiative by the International Energy Agency to reduce standby power-use by any appliance to not more than one watt in 2010, and 0.5 watts in 2013, which has given rise to regulations in many countries ...

Outage management system

Major functions usually found in an OMS include: Providing information on extent of outages and number of customers impacted to management, media and regulators. Calculation of estimation of restoration times. Prioritizing restoration efforts and ...

Parasitic load

Parasitic load is a term used with regard to electrical appliances and railway locomotives. With regard to electrical appliances, it represents the power consumed even when the appliance is shut off, that is standby power. With regard to railway ...

Passive sign convention

In electrical engineering, the passive sign convention is a sign convention or arbitrary standard rule adopted universally by the electrical engineering community for defining the sign of electric power in an electric circuit. The convention defi ...

Per-unit system

In the power systems analysis field of electrical engineering, a per-unit system is the expression of system quantities as fractions of a defined base unit quantity. Calculations are simplified because quantities expressed as per-unit do not chan ...

Performance per watt

In computing, performance per watt is a measure of the energy efficiency of a particular computer architecture or computer hardware. Literally, it measures the rate of computation that can be delivered by a computer for every watt of power consum ...

Power distribution center

A power distribution center is electrical equipment designed to regulate the distribution of electrical power to various equipment, be that to machines in a factory or to various systems on an automotive vehicle. Typically, a switchgear supplies ...

Power engineering

Power engineering, also called power systems engineering, is a subfield of electrical engineering that deals with the generation, transmission, distribution and utilization of electric power, and the electrical apparatus connected to such systems ...

Power management system

On marine vessels the Power Management System PMS is in charge of controlling the electrical system. Its task is to make sure that the electrical system is safe and efficient. If the power consumption is larger than the power production capacity, ...

Power over Ethernet

Power over Ethernet or PoE describes any of several standard or ad hoc systems which pass electric power along with data on twisted pair Ethernet cabling. This allows a single cable to provide both data connection and electric power to devices su ...

Maximum continuous rating

In electrical engineering and mechanical engineering, the power rating of equipment is the highest power input allowed to flow through particular equipment. According to the particular discipline, the term "power" may refer to electrical or mecha ...

Power system simulation

Electrical power system simulation involves power system modeling and network simulation in order to analyze electrical power systems using design/offline or real-time data. Power system simulation softwares are a class of computer simulation pro ...

Power usage effectiveness

Power usage effectiveness is a ratio that describes how efficiently a computer data center uses energy; specifically, how much energy is used by the computing equipment. PUE is the ratio of total amount of energy used by a computer data center fa ...

Power-system automation

Power-system automation is the act of automatically controlling the power system via instrumentation and control devices. Substation automation refers to using data from Intelligent electronic devices, control and automation capabilities within t ...

Prospective short-circuit current

The prospective short-circuit current, available fault current, or short-circuit making current is the highest electric current which can exist in a particular electrical system under short-circuit conditions. It is determined by the voltage and ...

Public Utility Holding Company Act of 1935

The Public Utility Holding Company Act of 1935, also known as the Wheeler-Rayburn Act, was a US federal law giving the Securities and Exchange Commission authority to regulate, license, and break up electric utility holding companies. It limited ...

Pulsed DC

Pulsed DC or pulsating direct current is a periodic current which changes in value but never changes direction. Some authors use the term pulsed DC to describe a signal consisting of one or more rectangular, rather than sinusoidal, pulses. Pulsed ...

Ring ground

A ring ground is a type of electrical ground that is used to protect buildings and equipment from damage due to electrical surges. Ring grounds are typically used as protection against lightning strikes. They are also known as ground rings, altho ...

Ripple (electrical)

Ripple in electronics is the residual periodic variation of the DC voltage within a power supply which has been derived from an alternating current source. This ripple is due to incomplete suppression of the alternating waveform after rectificati ...

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