901 articles
Potomac Electric Power Company
The Potomac Electric Power Company (Pepco) is an electric utility serving Washington, D.C., and Montgomery and Prince George's counties in Maryland, incorporated in 1896 and owned by Exelon.
Power and Water Utility Company for Jubail and Yanbu
The Power and Water Utility Company for Jubail and Yanbu, known as Marafiq, is a Saudi utility serving the Jubail and Yanbu industrial cities since 2003.
Power Assets
Power Assets Holdings Limited, known until 2011 as Hongkong Electric Holdings, is a Hong Kong-listed investment company holding electricity, gas, and renewable energy utilities across several countries.
Power flow calculation
A power flow calculation, also called load flow, is a numerical method that computes the steady-state operating point of an electrical grid, giving bus voltages and line power flows.
Power Grid Corporation of India (पावर ग्रिड कॉर्पोरेशन ऑफ़ इंडिया लिमिटेड)
Power Grid Corporation of India Limited, known as POWERGRID, is India's largest state-owned power transmission utility, a Government of India Maharatna enterprise incorporated in 1989.
Power outage
A power outage, also called a power failure or power cut, is the loss of electric service, ranging from brief interruptions to blackouts lasting days or weeks.
Power quality monitor
A power quality monitor is an instrument that analyzes voltage and current signals to detect, record, and quantify disturbances such as sags, swells, harmonics, flicker, and transients.
Power synchronization control
Power synchronization control is a grid-forming control method for voltage-source converters that synchronizes to the AC grid through a power loop instead of a phase-locked loop.
Power system stabilizer
A power system stabilizer (PSS) is a supplementary controller on a synchronous generator's excitation system that damps low-frequency electromechanical rotor oscillations by modulating field voltage, extending power transfer capability.
Power system state estimation
Power system state estimation is a computational method that estimates voltage magnitudes and phase angles at every bus of an electric network from redundant, noisy power and voltage measurements.
Power transformer
A power transformer transfers energy between AC circuits at different voltage levels, stepping voltage up for transmission and down for distribution in the power grid.
Power-flow study
A power-flow study, or load-flow study, computes voltages, currents, and power flows in an electrical network, checking that delivery stays within voltage and thermal limits.
Power-from-shore
Power-from-shore is the supply of onshore grid electricity to offshore oil and gas installations via subsea cables, replacing gas turbines; it is Norway's most important measure for cutting petroleum emissions.
Power-line communication
Power-line communication, also known as power-line networking or broadband over powerline, carries data signals over existing electrical power lines for smart grids, smart metering, home automation, and in-home networking.
PowerCON
PowerCON is a family of locking three-conductor AC mains connectors made by Neutrik, introduced in 1996 and now standard on professional moving-head light systems and other AV equipment.
PowerSouth Energy Cooperative
PowerSouth Energy Cooperative is a generation and transmission electric cooperative headquartered in Andalusia, Alabama. Founded in 1941, it wholesales power to 18 cooperatives and four municipal systems.
PPL Corporation
PPL Corporation, originally Pennsylvania Power & Light, is an Allentown, Pennsylvania energy holding company formed in 1920 that delivers electricity in four states and gas in two.
Primary frequency response
Primary frequency response is the rapid, automatic action of grid generators to arrest and stabilize frequency deviations within seconds, until secondary control restores normal frequency.
Protective earth (ground)
A protective earth, or equipment ground, is a conductor connecting exposed metal parts of equipment to earth so an insulation fault cannot leave them at a dangerous voltage.
Protective relay
A protective relay, also called a protection relay, is a device that monitors current and voltage, detects faults, and trips circuit breakers to isolate the faulted section.
Provincial Electricity Authority
The Provincial Electricity Authority (การไฟฟ้าส่วนภูมิภาค; PEA) is a Thai state enterprise, established in 1960, that buys bulk electricity and distributes it to over 20 million customers across 74 of Thailand's 77 provinces.
PSE&G
PSE&G, formally Public Service Electric and Gas Company, is a New Jersey utility delivering electricity and natural gas to about 2.4 million electric and 1.9 million gas customers.
PSEG
Public Service Enterprise Group (PSEG) is a New Jersey utility holding company founded in 1903, operating the state's largest electric and gas utility and nuclear plants.
PSEG Long Island
PSEG Long Island, a subsidiary of Public Service Enterprise Group, has operated the Long Island Power Authority's electric grid, serving about 1.1 million customers, since 2014.
PT Voksel
PT Voksel Electric Tbk (VOKS) is an Indonesian cable manufacturer and EPC contractor producing power, copper wire, and fiber optic cables, founded in 1971 and listed in 1990.
Public Establishment of Electricity Generation
The Public Establishment of Electricity Generation is Syria's state body owning and operating the country's thermal power plants; created in 1994, it was merged into the Syrian Electricity Company in 2026.
Public Power Corporation
Public Power Corporation (ΔΕΗ, PPC) is Greece's largest electricity generation and supply company. Founded in 1950, it has 11.1 GW of capacity, serves about 5.6 million customers, and is phasing out lignite.
Public safety power shutoff
A public safety power shutoff (PSPS) is the proactive de-energization of power lines by a utility during extreme wildfire risk, used as a last resort before fire starts.
Public Service Company of Colorado
Public Service Company of Colorado (PSCo) is an investor-owned electric and natural gas utility centered on Denver, formed in 1924 and now an Xcel Energy subsidiary.
Public Service Company of Oklahoma
Public Service Company of Oklahoma, or PSO, is an investor-owned electric utility in Tulsa serving about 580,000 customers as a subsidiary of American Electric Power.