901 articles
Public Service Electric and Gas
Public Service Electric and Gas (PSE&G) is a regulated utility distributing electricity and natural gas throughout New Jersey, serving roughly 2.4 million electric and 1.9 million gas customers.
Puerto Rico Electric Power Authority
The Puerto Rico Electric Power Authority (PREPA; Spanish: Autoridad de Energía Eléctrica) is Puerto Rico's public power corporation, the sole electric utility serving about 1.5 million customers.
Puget Sound Energy
Puget Sound Energy is an investor-owned utility headquartered in Bellevue, Washington, serving about 1.1 million electric and 800,000 gas customers; its gas business dates to 1873, and its present name was adopted in 1997.
Pukchang Thermal Plant Complex
Pukchang Thermal Plant Complex, also called the Pukchang power station, is North Korea's largest power plant, a coal-fired station of at least 1,600 MW in South Pyongan Province.
Punjab State Power Corporation Limited
Punjab State Power Corporation Limited (PSPCL) is the state-owned utility that generates and distributes electricity in Punjab, India, formed in 2010 from the Punjab State Electricity Board.
Radisson Converter Station
Radisson Converter Station is an HVDC converter station in northern Manitoba, owned by Manitoba Hydro near Gillam, which converts AC from Nelson River hydroelectric stations to DC for transmission to Winnipeg.
Ralph D. Masiello
Ralph D. Masiello is an electric power systems engineer and National Academy of Engineering member who led analysis behind California's 2013 mandate to procure 1,325 megawatts of storage.
RATCH Group
RATCH Group (บมจ. ราช กรุ๊ป) is a Thai power-industry holding company founded by EGAT in 2000, listed in Thailand as "RATCH", investing in electricity generation and energy businesses in Thailand, ASEAN, and Australia.
Rate of change of frequency (RoCoF)
Rate of change of frequency (RoCoF) measures how quickly grid frequency changes, in Hz/s, after a generation-demand imbalance; it rises as inverter-based renewables displace synchronous generators.
Ratnagiri Gas and Power Private Ltd
Ratnagiri Gas and Power Private Limited (RGPPL) is an Indian power generation company, formed in 2005 to revive the abandoned Enron Dabhol project, now a subsidiary of NTPC.
Reactive power
Reactive power is the portion of AC electricity that sustains the electric and magnetic fields of equipment like motors and transformers, and it directly influences grid voltage.
Reactive power optimization
Reactive power optimization, also known as optimal reactive power dispatch or Volt/VAR optimization, adjusts generator voltages, transformer taps, and VAR sources to cut grid power losses.
Recloser
A recloser is an automatic switching device on electric power lines that interrupts fault current and recloses to test whether the fault has cleared, locking open if it persists.
Reconductoring
Reconductoring is the replacement of the wires on an existing overhead transmission or distribution line with new conductors, reusing existing towers and rights of way to increase capacity.
Rectifier transformer
A rectifier transformer is a specialized power transformer that supplies AC from the grid to a rectifier converting it to DC, serving electrolysis, plating, and DC drives.
Red Eléctrica de España
Red Eléctrica de España (REE) is the sole transmission system operator of Spain, running the national high-voltage grid since 1985 as the first company in the world dedicated exclusively to electricity transmission.
Reder Advisors
Reder Advisors is a Chicago utilities consultancy founded in 2018 by Wanda K. Reder, an electric power engineer elected to the National Academy of Engineering in 2016.
Redes Energéticas Nacionais
Redes Energéticas Nacionais (REN) is the Portuguese transmission system operator for electricity and natural gas, created in 1994. In 2025 renewables supplied a record 68% of Portugal's electricity consumption.
Relay coordination
Relay coordination is the process of choosing protective relay settings and time delays so devices trip in sequence during a fault, isolating the smallest part of the power system.
Réseau de Transport d'Électricité
Réseau de Transport d'Électricité (RTE) is the French transmission system operator that owns and runs the high-voltage electricity grid in mainland France, created in 2000.
Resonant transformer
A resonant transformer is a high-voltage test transformer operated in a resonant circuit, producing large test voltages from a small power source for testing cables and switchgear.
Rhode Island Energy
Rhode Island Energy is the utility that delivers electricity and natural gas to over 770,000 customers across Rhode Island, operating as a subsidiary of PPL Corporation.
Richard E. Balzhiser
Richard E. Balzhiser (1932–2012) was an American chemical and nuclear energy engineer who led the Electric Power Research Institute as president and CEO from 1988 to 1996.
Richard P. O'Neill
Richard P. O'Neill is an American energy economist at ARPA-E who was elected to the National Academy of Engineering in 2022 for designing natural gas and electricity markets.
Right-of-way (transmission)
A right-of-way in electric power transmission is the strip of land under a transmission line over which the utility holds rights to build, operate, and maintain the line.
Rihand converter station
The Rihand converter station is the sending-end terminal of the Rihand–Dadri HVDC link, a 1,500 MW system carrying power from Uttar Pradesh toward Delhi since 1990.
Ring main unit
A ring main unit (RMU) is a compact, factory-assembled switchgear unit used at load points of a ring distribution network, typically rated 11 to 24 kV.
Robert J. Creagan
Robert J. Creagan was a Westinghouse nuclear engineer from 1949 into the 1990s, known for analyzing pressurized water reactor limits and holding nuclear fuel patents.
Rolling blackout
A rolling blackout, also called loadshedding, is a deliberate, rotating shutdown of power to blocks of customers to keep demand from exceeding supply and protect the grid.
Rosseti
Rosseti (ПАО «Россети») is a Russian state-controlled electric grid holding, created in 2002, that manages 2.5 million kilometers of lines and transmits about 80% of Russia's electricity.