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Device measuring electrical waves on a power grid
A phasor measurement unit (PMU) is a device used to estimate the magnitude and phase angle of an electrical phasor quantity (such as voltage or current)
Phasor_measurement_unit
Quantity standard
A unit of measurement, or unit of measure, is a definite magnitude of a quantity, defined and adopted by convention or by law, that is used as a standard
Unit_of_measurement
System of identifying electrical power devices
– Scheme Logic MET – Substation Metering PDC – Phasor Data Concentrator PMU – Phasor Measurement Unit PQM – Power Quality Monitor RIO – Remote Input/Output
ANSI_device_numbers
Power grid frequency measurement system
GridEye) is a wide-area power system frequency measurement system. Using a type of phasor measurement unit (PMU) known as a frequency disturbance recorder
FNET
Conformity Test PD—Preliminary Determination PDC—Phasor data concentrator. See description in phasor measurement unit article. (electricity) PDCI—Pacific Direct
List_of_energy_abbreviations
Topics referred to by the same term
Phasor measurement unit, a measurement device in power systems to estimate magnitude and phase angle of time-varying electric signals Police MRT Unit
PMU
Measurement units used in the Ottoman Empire
The list of traditional Turkish units of measurement, a.k.a. Ottoman units of measurement, is given below. The Ottoman Empire (1299–1923), the predecessor
Ottoman_units_of_measurement
Unit of length
length when surveying land. The rod was still in use as a common unit of measurement in the mid-19th century, when Henry David Thoreau used it frequently
Rod_(unit)
American academic
the power industry, particularly microprocessor controllers and Phasor measurement unit (PMU) technology in electric power systems.[citation needed] Textbook:
Arun_G._Phadke
American mathematician and electrical engineer (1865–1923)
"a simple problem of algebra". He systematized the use of complex number phasor representation in electrical engineering education texts, whereby the lower-case
Charles_Proteus_Steinmetz
Topics referred to by the same term
synthesizer for the Apple II computer Phasor measurement unit, a device that measures phasors on an electricity grid Phasor (radio broadcasting), a network
Phasor_(disambiguation)
Simplest symbolic representation of an electric power system
involves direct simultaneous measurements (synchrophasor) using the phasor measurement units. The theory of three-phase power systems tells us that as
Single-line_diagram
Customary unit of length
foot (standard symbol: ft) is a unit of length in the British imperial and United States customary systems of measurement. The prime symbol, ′, is commonly
Foot_(unit)
Type of electrical grid
radio technology, and Digital protective relays. Smart meters. Phasor measurement units. Many in the power systems engineering community believe that the
Smart_grid
Wide-area electricity transmission network
control of the network would use smart grid technologies such as phasor measurement units to rapidly detect imbalances in the network caused by fluctuating
Super_grid
Modern form of the metric system
comprises a coherent system of units of measurement starting with seven base units, which are the second (symbol: s, the unit of time), metre (m, length)
International_System_of_Units
receiving data from an outside source such as a phasor measurement unit. That data is used to create measurements which are sent to other adapters to be processed
OpenPDC
Integration of energy sectors
HVDC bulk transmission Load following Load management Peak demand Phasor measurement unit Power-line communication Power-to-X Sector coupling Policies Carbon
Sector_coupling
SATEC labs. Examples are fault detection, location and recording, Phasor Measurement Unit (per IEEE C37.118-2005) for wide-area monitoring of frequency and
SATEC
Simplifying model for electrical grids
not fully available, such as for external areas or when using phasor measurement unit (PMU) data. These methods rely on active and reactive power exchange
Power_system_reduction
Power outage in Spain and Portugal
low-frequency oscillations of the frequency were measured (with phasor measurement units) and damped out. The 0.2 Hz oscillations appear to have been between
2025 Iberian Peninsula blackout
2025_Iberian_Peninsula_blackout
Measurement of radiation exposure
roentgen or röntgen (/ˈrɛntɡən, -dʒən, ˈrʌnt-/; symbol R) is a legacy unit of measurement for the exposure of X-rays and gamma rays, and is defined as the
Roentgen_(unit)
Large scale electricity supply management
HVDC bulk transmission Load following Load management Peak demand Phasor measurement unit Power-line communication Power-to-X Sector coupling Policies Carbon
Grid_energy_storage
List of definitions of terms and concepts used in electrical engineering and electronics
to frequency modulation. phasor A vector representing a signal of a given frequency in phase space. phasor measurement unit A system that measures the
Glossary of electrical and electronics engineering
Glossary_of_electrical_and_electronics_engineering
Term in electrical engineering
was taken out of service, the SCR fell to around 2 or below, and phasor measurement units at the POI recorded sustained voltage oscillations. Investigation
Short circuit ratio (electrical grid)
Short_circuit_ratio_(electrical_grid)
Technique used in the development and testing of complex real-time embedded systems
Leelaruji, R. (22 July 2012). "Virtualization of synchronized phasor measurement units within real-time simulators for smart grid applications". 2012
Hardware-in-the-loop simulation
Hardware-in-the-loop_simulation
Probability of a normal operation of the electrical grid at a given time
to unaffected areas without manual intervention. Furthermore, phasor measurement units (PMUs) used in Wide Area Monitoring Systems (WAMS) help maintain
Power_system_reliability
Non-SI unit measuring absorbed dose of ionizing radiation
on the approximation of the laws of the Member States relating to Unit of measurement and on the repeal of Directive 71/354/EEC". Retrieved 19 May 2012
Rad_(radiation_unit)
Unit of length
inch (symbol: in or ″) is a unit of length in the British Imperial and the United States customary systems of measurement. It is equal to 1/36 yard
Inch
capability. Phasor measurement units (PMUs) are typically preferred to obtain sufficient fidelity in voltage/current angle measurements. These modern
Wide-area_damping_control
Storing surplus electricity production in chemical form
encompassed by the term. In 2016 the German government funded a €30 million first-phase research project into power-to-X options. Surplus electric power can be
Power-to-X
Measurement of power meeting specifications
filters can remove harmonics. Modern systems use sensors called phasor measurement units (PMU) distributed throughout their network to monitor power quality
Electric_power_quality
Network protocol for smart grid applications
HVDC bulk transmission Load following Load management Peak demand Phasor measurement unit Power-line communication Power-to-X Sector coupling Policies Carbon
Open_Smart_Grid_Protocol
Ziaei, S.; Binderbauer, M. W.; Osakabe, M. (21 February 2023). "First measurements of p11B fusion in a magnetically confined plasma". Nature Communications
Timeline of sustainable energy research 2020 to the present
Timeline_of_sustainable_energy_research_2020_to_the_present
Opposition of a circuit to a current when a voltage is applied
ratio of the phasor voltage across the element to the phasor current through the element, as determined by the relative amplitudes and phases of the voltage
Electrical_impedance
Unit of length
Swedish Units of Measurement - Linear Measure Suureet ja yksiköt. SI-mittayksikköjärjestelmä Quantities and units. The International System of Units (SI)
Mile
Radiation Units and Measurements (ICRU) is a standardization body set up in 1925 by the International Congress of Radiology, originally as the X-Ray Unit Committee
International Commission on Radiation Units and Measurements
International_Commission_on_Radiation_Units_and_Measurements
SI derived unit of angle
1936 and 2022 have made proposals to treat the radian as a base unit of measurement for a base quantity (and dimension) of "plane angle". Quincey's review
Radian
Power lines designated by the US DOE as needing expansion
HVDC bulk transmission Load following Load management Peak demand Phasor measurement unit Power-line communication Power-to-X Sector coupling Policies Carbon
National Interest Electric Transmission Corridor
National_Interest_Electric_Transmission_Corridor
Recording of temperature
Temperature measurement (also known as thermometry) describes the process of measuring a current temperature for immediate or later evaluation. Datasets
Temperature_measurement
Petroleum pH meter Phase (waves) Phase converter Phase-fired controllers Phase-locked loop Phase modulation Phasor Phasor measurement unit Phasor Phonograph Photocell
Index of electrical engineering articles
Index_of_electrical_engineering_articles
Interaction of a quantum system with a classical observer
In quantum physics, a measurement is the testing or manipulation of a physical system to yield a numerical result. A fundamental feature of quantum theory
Measurement in quantum mechanics
Measurement_in_quantum_mechanics
Device for measuring a physical quantity
events are used as units, and the process of measurement gives a number relating the item under study and the referenced unit of measurement. Measuring instruments
List_of_measuring_instruments
Satellite navigation technique used to enhance the precision of position data
mobile units. The base station re-broadcasts the phase of the carrier that it observes, and the mobile units compare their own phase measurements with the
Real-time kinematic positioning
Real-time_kinematic_positioning
standard adequate measurement is 200; this is generally equivalent to 27 kPa of combined pressure change within 10 minutes. Units are directly equal
Montevideo_units
Unit of weight or mass, with differing values
NIST. 3 December 2019. Retrieved 15 February 2020. Text of the UK Units of Measurement Regulations 1995 as originally enacted or made within the United
Hundredweight
Imperial and US customary unit
translate similar units in other measurement systems. The word "bushel" was originally used for a container, and later as a unit of measurement. The name comes
Bushel
States of matter for water as a solid
entropy difference between ice VI (disordered phase) and ice IV is very small, according to Bridgman's measurement. Several organic nucleating reagents had
Phases_of_ice
Conversion of the definition of a unit of measure into reality
methods of realisation: Realisation of a measurement unit from its definition. Reproduction of measurement standards. Adopting a particular artefact
Realisation_(metrology)
SI unit of apparent power in an electrical circuit
The volt-ampere (SI symbol: VA, sometimes V⋅A or V A) is the unit of measurement for apparent power in an electrical circuit. It is the product of the
Volt-ampere
Unit of measurement for temperature
it to refer exclusively to the French-language name for the unit of angular measurement. For Vienna Standard Mean Ocean Water at one standard atmosphere
Celsius
HVDC bulk transmission Load following Load management Peak demand Phasor measurement unit Power-line communication Power-to-X Sector coupling Policies Carbon
Electranet
SI derived unit of molar energy
but the unit of measurement is used specifically to describe certain existing phenomena, such as in thermodynamics it is the unit of measurement that describes
Joule_per_mole
SI unit of temperature
2022-02-21. "Handbook 44 – 2026 – Appendix C – General Tables of Units of Measurement" (PDF). nist.gov. NIST. Retrieved 2026-02-23. "Kelvin: History".
Kelvin
quantified by measurement; it has a value and units. The International System of Quantities, which underlies the International System of Units, defines seven
List_of_physical_quantities
Issue in determining wave cycle part
physics, the phase problem is the problem of loss of information concerning the phase that can occur when making a physical measurement. The name comes
Phase_problem
Video signal feature
The IRE unit is used in the measurement of composite video signals. Its name is derived from the initials of the Institute of Radio Engineers. A value
IRE_(unit)
Hydro power station in New Zealand
restoration of circuits after a fault. EA Networks plans to install phasor measurement units (or synchrophasors) on their 66 kV network in 2025 to enable automatic
Highbank_Power_Station
is still in vogue in villages for economic reasons. List of customary units of measurement in South Asia "Ground". Sizes. Retrieved 2007-01-20. v t e
Ground_(unit)
Sciences with reforming the units of measurement. The Academy formed a commission, which rejected using the pendulum as a unit of length and decided that
History_of_the_metre
Conversion to the metric system of measurement
the metric system of measurement. All over the world, countries have transitioned from local and traditional units of measurement to the metric system
Metrication
Measure of alcohol content
States, alcohol proof is defined as twice the percentage of ABV. The measurement of alcohol content and the statement of content on bottles of alcoholic
Alcohol_proof
Measurement of absorbed ionizing radiation
dosimetry in the fields of health physics and radiation protection is the measurement, calculation and assessment of the ionizing radiation dose absorbed by
Dosimetry
Methods and tools to measure electricity
definition of the units for electrical measurements, with precision in some cases on the order of a few parts per million. Less precise measurements are required
Electrical_measurements
storage systems and electric heaters. For real-time monitoring, phasor measurement units (PMUs) are used. "EPFL Smart Grid Control - Commelec". École Polytechnique
Commelec
Adoption of the metric system of measurements
measurement system (Imperial units) is still used in society. Imperial units as of 2024 remain mandated by law to still be used without metric units for
Metrication in the United Kingdom
Metrication_in_the_United_Kingdom
Ancient unit of mass
of men (Iliad 8.69, 19.223, 22.209). The term is also used as a unit of measurement, always denoting gold. "From the order of the prizes in Il. 23.262
Talent_(measurement)
Tool used to measure dimensions of an object
corrupt form of caliber. Many types of calipers permit reading out a measurement on a ruled scale, a dial, or an electronic digital display. A common
Calipers
Old French measurement system
of measurement History of the metric system International System of Units List of unusual units of measurement Metric system Systems of measurement Units
Mesures_usuelles
Number of occurrences or cycles per unit time
occur repeatedly in geometry or space. The unit of measurement of frequency in the International System of Units (SI) is the hertz, having the symbol Hz
Frequency
Unit of measurement
The function point is a "unit of measurement" to express the amount of business functionality an information system (as a product) provides to a user
Function_point
Amount of energy deposited in matter by ionizing radiation
the European Union European units of measurement directives required that their use for "public health ... purposes" be phased out by 31 December 1985. Kerma
Absorbed_dose
original (PDF) on October 13, 2008. Retrieved 2010-07-20. time unit (TU): A measurement of time equal to 1024 μs. Maufer, Thomas (2004). A Field Guide
TU_(time_unit)
Physical constant for the strength of gravity induced by a mass
Technology References on Constants, Units, and Uncertainty The Controversy over Newton's Gravitational Constant — additional commentary on measurement problems
Gravitational_constant
Application software published by ETAS
INCA (Integrated Calibration and Application Tool) is a measurement, calibration and diagnostic software published by ETAS. With its large installation
INCA_(software)
Measurement of a passive magnetic circuit
(SI Unit: H−1) is a measurement of a passive magnetic circuit (or element within that circuit) dependent on sinusoidal magnetomotive force (SI Unit: At·Wb−1)
Magnetic_complex_reluctance
Speed of electromagnetic waves in vacuum
adopted for the fixed speed of light in the current unit system was chosen to agree with the best measurements available before 1983. The current definition
Speed_of_light
Basic unit of quantum information
where the relative phase have no effect on measurement. Measuring instead in the X or Y Pauli basis depends on the relative phase. For example, ( | 0
Qubit
Instrument for measuring the concentration of suspended particulates
Unit (FNU). The most generally applicable unit is Formazin Turbidity Unit (FTU), although different measurement methods can give quite different values
Nephelometer
In power systems, expression of system quantities as fractions
per-unit value is a phasor. The phase angles of complex power, voltage, current, impedance, etc., are not affected by the conversion to per unit values
Per-unit_system
weights and measures Jain units of time Jyotishya List of numbers in Hindu scriptures Tamil months Tamil units of measurement Time in India Universe Vedanga
Hindu_units_of_time
Continuous progression from past to future
of action, age, and causality, being a component quantity of various measurements used to sequence events, to compare the duration of events (or the intervals
Time
Analysis of the dimensions of different physical quantities
compared to each other, even if they are expressed in differing units of measurement; e.g., metres and feet, grams and pounds, seconds and years. Incommensurable
Dimensional_analysis
Distance from center of Earth to center of Moon
Earth. The measurement is also useful in measuring the lunar radius, as well as the distance to the Sun. Millimeter-precision measurements of the lunar
Lunar_distance
Property of magnitude or multitude
"less", or "equal", or by assigning a numerical value multiple of a unit of measurement. Quantity is among the basic classes of things along with quality
Quantity
Unit of time based on Earth's orbit
A year is a unit of time based on how long it takes the Earth to orbit the Sun. In scientific use, the tropical year (approximately 365 solar days, 5 hours
Year
Quantity with no physical dimension
into units of measurement. Typically expressed as ratios that align with another system, these quantities do not necessitate explicitly defined units. For
Dimensionless_quantity
Derived SI unit of equivalent dose of ionizing radiation
renowned for work on radiation dose measurement and research into the biological effects of radiation. The sievert unit is used for radiation dose quantities
Sievert
Apollo spacecraft guidance system
inertial measurement unit (IMU) was the Delco Division of General Motors. PGNCS consisted of the following components: an inertial measurement unit (IMU)
Apollo_PGNCS
Rate at which air moves from high- to low-pressure areas
Organization – International Standards and Recommended Practices – Units of Measurement to be Used in Air and Ground Operations – Annex 5 to the Convention
Wind_speed
Unit used in signals
decibels. For example, phase noise is expressed in dBc/Hz at a given frequency offset from the carrier. dBc can also be used as a measurement of Spurious-Free
DBc
Quantifying the behaviour of loudspeakers
of the drive units on the axis with the high-frequency driver. While this can produce repeatable results, such a 'free-space' measurement is not representative
Loudspeaker_measurement
Power carried by sound waves
intensity, is the watt per square meter (W/m2). One application is the noise measurement of sound intensity in the air at a listener's location as a sound energy
Sound_intensity
Figure formed by two rays meeting at a common point
issue of "measurement units chosen". A smoother approach is to measure the angle by the length of the corresponding unit circle arc. Here "unit" can be
Angle
Flow of electric charge
Electrical measurements History of electrical engineering Polarity symbols International System of Quantities SI electromagnetism units Single-phase electric
Electric_current
Power in alternating current systems
denotes the positive sequence voltage phasor, and I + {\displaystyle I^{+}} denotes the positive sequence current phasor. A perfect resistor stores no energy;
AC_power
Antenna testing techniques
Antenna measurement techniques refer to the testing of antennas to ensure that they meet specifications or simply to characterize them. Typical antenna
Antenna_measurement
Air pollution measurement is the process of collecting and measuring the components of air pollution, notably gases and particulates. The earliest devices
Air_pollution_measurement
Pressure exerted by a vapor in thermodynamic equilibrium
pascal (Pa) as its standard unit. One pascal is one newton per square meter (N·m−2 or kg·m−1·s−2). Experimental measurement of vapor pressure is a simple
Vapor_pressure
Measuring instrument for surface profile and roughness
1000 fps. Time-resolved systems enable measurement of topography changes as healing of smart materials or measurement of moving specimens. Time-resolved profilometers
Profilometer
PHASOR MEASUREMENT-UNIT
PHASOR MEASUREMENT-UNIT
Surname or Lastname
English, Portuguese, Galician, Spanish, Catalan, and French
English, Portuguese, Galician, Spanish, Catalan, and French : occupational name for a shepherd, Anglo-Norman French pastre (oblique case pastour), Portuguese, Galician, Spanish, Catalan, pastor ‘shepherd’, from Latin pastor, an agent derivative of pascere ‘to graze’. The religious sense of a spiritual leader was rare in the Middle Ages, and insofar as it occurs at all it seems always to be a conscious metaphor; it is unlikely, therefore, that this sense lies behind any examples of the surname.German and Dutch : humanistic name, a Latinized form of various vernacular names meaning ‘shepherd’, for example Hirt or Schäfer (see Schafer).Americanized spelling of Hungarian Pásztor, an occupational name from pásztor ‘shepherd’.
Boy/Male
Bengali, Indian
Sun
Boy/Male
Arabic
Raising; Collecting
Girl/Female
Hindu, Indian, Marathi
Size of Moon
Male
Spanish
Spanish name derived from Latin Pastor, PASTOR means "shepherd." St. Pastor was a 9-year-old boy who along with his 13-year-old brother, Justus, was martyred at Alcalá de Henares in the early 4th century.
Surname or Lastname
English and Irish
English and Irish : variant spelling of Fair.
Boy/Male
Muslim
Uprising
Boy/Male
Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Sanskrit, Telugu
A Bird Enamoured of the Moon
Boy/Male
Latin
Shepherd.
Surname or Lastname
English
English : variant of Farrar.
Boy/Male
Arabic, Muslim
Wisdom; Decorum
Girl/Female
Biblical
Court, hay.
Boy/Male
Hindu
A bird enamored of the Moon
Boy/Male
Biblical
An ass, clay, dirt.
Boy/Male
Sikh
Alt spelling Farid
Girl/Female
Biblical
A partaker, a companion.
Surname or Lastname
English
English : probably a variant spelling of Hamer.
Boy/Male
Hebrew
Strong.
Surname or Lastname
English
English : metonymic occupational name for a maker of razors or a barber, from Old French rasor, rasur ‘razor’.Humanist Latinized form of the German occupational name Bartscherer ‘barber’ (literally ‘beard cutter’), recorded as early as the 14th century.
Boy/Male
Arabic, Muslim, Pashtun
Uprising
PHASOR MEASUREMENT-UNIT
PHASOR MEASUREMENT-UNIT
Male
English
Variant spelling of English unisex Mahlah, MAHALAH means "disease." In the bible, this is the name of a Gileadite (sex uncertain), and the name of the eldest of Zelophehad's five daughters.
Girl/Female
Tamil
The earth, Of the universe, Bestowed with speed
Boy/Male
Tamil
Poornendu | பூரà¯à®£à¯‡à®¨à¯à®¤à¯
Full Moon
Male
Hindi/Indian
(Tamil à®®à¯à®°à¯à®•à®©à¯): Hindi name MURUGAN means "six-faced." In mythology, this is the name of a god of war, the husband of Valli. Variant spelling of Hindi Murukan, meaning "six-faced."
Male
Ukrainian
, Christian, follower of Christ.
Male
Irish
Variant spelling of Irish RuaidhrÃ, RUAIRÃ means "red king."
Boy/Male
Tamil
Capable, Skilful
Girl/Female
Australian, Turkish
Beautiful Gorgeous River in Kurdistan
Female
Hindi/Indian
Hindi name KIRI means "amaranth flower."
Boy/Male
Tamil
Bright
PHASOR MEASUREMENT-UNIT
PHASOR MEASUREMENT-UNIT
PHASOR MEASUREMENT-UNIT
PHASOR MEASUREMENT-UNIT
PHASOR MEASUREMENT-UNIT
n.
Any appearance or aspect of an object of mental apprehension or view; as, the problem has many phases.
n.
Alt. of Phasma
v.
Measurement, especially of coal.
n.
Wrong measurement.
n.
Measurement by the ell; alnage.
n.
A pharos; a lighthouse.
n.
See Phase.
pl.
of Phase
a.
Relating to measurement; involving, or proceeding by, measurement.
a.
Pertaining to, or employed in, the measurement of magnetic forces; obtained by means of a magnetometer; as, magnetometric instruments; magnetometric measurements.
n.
The act or result of measuring; mensuration; as, measurement is required.
n.
Same as Chase gun, esp. in terms bow chaser and stern chaser. See under Bow, Stern.
v. i.
To make a measurement or measurements.
n.
A species of starling (Pastor roseus), native of the plains of Western Asia and Eastern Europe. Its head is crested and glossy greenish black, and its back is rosy. It feeds largely upon locusts.
n.
The extent, size, capacity, amount. or quantity ascertained by measuring; as, its measurement is five acres.
n.
Universal measurement.
n.
Measurement of distances by the odometer.
n.
Measurement (of cloth) by the ell; also, a duty for such measurement.
pl.
of Phasis
a.
The act of measuring; measurement.