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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
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)
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
Conformity Test PD—Preliminary Determination PDC—Phasor data concentrator. See description in phasor measurement unit article. (electricity) PDCI—Pacific Direct
List_of_energy_abbreviations
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
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)
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
American academic
the power industry, particularly microprocessor controllers and Phasor measurement unit (PMU) technology in electric power systems.[citation needed] Textbook:
Arun_G._Phadke
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
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
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)
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
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
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
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
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
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)
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
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
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
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)
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)
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
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
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
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
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
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
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
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
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
Unit of volume with numerous different definitions
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
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
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
Unit of length
Swedish Units of Measurement - Linear Measure Suureet ja yksiköt. SI-mittayksikköjärjestelmä Quantities and units. The International System of Units (SI)
Mile
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
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
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
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
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
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
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
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)
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
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
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
HVDC bulk transmission Load following Load management Peak demand Phasor measurement unit Power-line communication Power-to-X Sector coupling Policies Carbon
Electranet
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
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)
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
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
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
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
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
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)
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
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)
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
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
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
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
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
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
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
Speed of electromagnetic waves in vacuum
common to use systems of natural units of measurement or the geometrized unit system where c = 1. Using these units, c does not appear explicitly because
Speed_of_light
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
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
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
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
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
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
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
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
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
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)
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
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
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
Unit of reciprocal color temperature
micro reciprocal degree, the mired (/ˈmaɪrɛd/[citation needed]) is a unit of measurement used to express color temperature. Values in mireds are calculated
Mired
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
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
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
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
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
Quantum states light can be in
field but a phase-dependent uncertainty (e). Generally, quantum uncertainty reveals itself through a large number of identical measurements on identical
Squeezed_states_of_light
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
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
Mass per unit volume
saying among other things that the method would have required precise measurements that would have been difficult to make at the time. Nevertheless, in
Density
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
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
ordered by radius and separated into categories by galaxy. The unit of measurement used is the radius of the Sun (approximately 695,700 km; 432,300 mi)
List_of_largest_stars
Flow of electric charge
Electrical measurements History of electrical engineering Polarity symbols International System of Quantities SI electromagnetism units Single-phase electric
Electric_current
Symbol rate measurement in telecommunications
common unit of measurement of symbol rate, which is one of the components that determine the speed of communication over a data channel. It is the unit for
Baud
Units used in toxicology
and JP Kreitinger. 2006. Measurement of total polycyclic aromatic hydrocarbon concentrations in sediments and toxic units used for estimating risk to
Toxic_unit
PHASOR MEASUREMENT-UNIT
PHASOR MEASUREMENT-UNIT
Boy/Male
Biblical
An ass, clay, dirt.
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
Girl/Female
Hindu, Indian, Marathi
Size of Moon
Boy/Male
Muslim
Uprising
Boy/Male
Arabic, Muslim
Wisdom; Decorum
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.
Boy/Male
Sikh
Alt spelling Farid
Boy/Male
Hebrew
Strong.
Girl/Female
Biblical
A partaker, a companion.
Boy/Male
Hindu
A bird enamored of the Moon
Surname or Lastname
English and Irish
English and Irish : variant spelling of Fair.
Boy/Male
Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Sanskrit, Telugu
A Bird Enamoured of the Moon
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.
Surname or Lastname
English
English : variant of Farrar.
Girl/Female
Biblical
Court, hay.
Boy/Male
Arabic
Raising; Collecting
Boy/Male
Arabic, Muslim, Pashtun
Uprising
Surname or Lastname
English
English : probably a variant spelling of Hamer.
Boy/Male
Latin
Shepherd.
PHASOR MEASUREMENT-UNIT
PHASOR MEASUREMENT-UNIT
Female
English
Pet form of English Jessica, JESSA means "one who beholds" or "one who looks out."
Boy/Male
Muslim
Girl/Female
American, Australian, Christian, Danish, Dutch, French, German, Hebrew, Swedish
Feminine of Joseph; Jehovah Increases; He will Increase; God Shall Add
Girl/Female
Hindu
Boy/Male
Anglo, British, English
From the Roe Deer Meadow
Boy/Male
Bengali, Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Sanskrit, Telugu
Lord Shiva
Female
Hebrew
(יַרְדָן) Hebrew unisex name YARDEN means "flowing down." In the bible, this is the name of a river in Palestine.
Boy/Male
Indian, Punjabi, Sikh
Intelligent; Efficient
Boy/Male
Biblical
That hears or obeys, my reputation, my fame.
Boy/Male
Bengali, Indian
Nectar from God
PHASOR MEASUREMENT-UNIT
PHASOR MEASUREMENT-UNIT
PHASOR MEASUREMENT-UNIT
PHASOR MEASUREMENT-UNIT
PHASOR MEASUREMENT-UNIT
n.
Same as Chase gun, esp. in terms bow chaser and stern chaser. See under Bow, Stern.
n.
The act or result of measuring; mensuration; as, measurement is required.
a.
Pertaining to, or employed in, the measurement of magnetic forces; obtained by means of a magnetometer; as, magnetometric instruments; magnetometric measurements.
n.
Measurement (of cloth) by the ell; also, a duty for such measurement.
n.
A pharos; a lighthouse.
n.
Alt. of Phasma
n.
Measurement by the ell; alnage.
n.
Wrong measurement.
n.
See Phase.
v.
Measurement, especially of coal.
pl.
of Phase
a.
Relating to measurement; involving, or proceeding by, measurement.
n.
Measurement of distances by the odometer.
n.
The extent, size, capacity, amount. or quantity ascertained by measuring; as, its measurement is five acres.
n.
Any appearance or aspect of an object of mental apprehension or view; as, the problem has many phases.
v. i.
To make a measurement or measurements.
pl.
of Phasis
n.
Universal measurement.
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.
a.
The act of measuring; measurement.