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Oscillations in an electric grid
The grid oscillations are oscillations in an electrical grid manifesting themselves in low-frequency (mostly below 1 Hz) periodic changes of the power
Grid_oscillation
Energy storage system using electrochemical secondary cells
battery energy grid storage (BEGS) or battery grid storage is a type of energy storage technology that uses a group of batteries in the grid to store electrical
Battery_energy_storage_system
Power outage in Spain and Portugal
– first period of oscillations in the grid detected and mitigated. 12:19 – 12:21 CEST – second period of oscillations in the grid detected and mitigated
2025 Iberian Peninsula blackout
2025_Iberian_Peninsula_blackout
Source of electricity
GFL devices cannot contribute to the grid strength, dampen active power oscillations, or provide inertia. A grid-forming (GFM) device partially mimics
Inverter-based_resource
Series of electrical grids that power the US and Canada
electrical power grid that powers Northern America is not a single grid, but is instead divided into multiple wide area synchronous grids. The Eastern Interconnection
North American power transmission grid
North_American_power_transmission_grid
Term in electrical engineering
recorded sustained voltage oscillations. Investigation revealed that the plant's voltage controller, tuned for stronger grid conditions, had excessive
Short circuit ratio (electrical grid)
Short_circuit_ratio_(electrical_grid)
Power grid frequency measurement system
damped. FNET/GridEye uses both the phase angle and frequency data to detect oscillations and provide real-time alerts. Once an oscillation has been detected
FNET
Facets of an ancillary service
control does not include reactive power injections to dampen the grid oscillations; these are a part of a separate ancillary service, so-called system
Voltage control and reactive power management
Voltage_control_and_reactive_power_management
Type of vacuum tube; early radio detector
paper on his oscillation valve, American engineer Lee de Forest in 1906 created a three-element vacuum tube, the Audion, by adding a wire grid between cathode
Fleming_valve
Number of occurrences or cycles per unit time
(SI) is the hertz, having the symbol Hz. For cyclical phenomena such as oscillations, waves, or for examples of simple harmonic motion, the term frequency
Frequency
Vacuum tube with four active electrodes
prone to oscillation due to the grid to anode capacitance of the triode. In the screen grid tube, a grid referred to as the screen grid, shield grid or sometimes
Tetrode
Electronic oscillator
Hartley oscillator is an electronic oscillator circuit in which the oscillation frequency is determined by a tuned circuit consisting of capacitors and
Hartley_oscillator
Recurring pattern of climate variability
The Pacific decadal oscillation (PDO) is a robust, recurring pattern of ocean-atmosphere climate variability centered over the mid-latitude Pacific basin
Pacific_decadal_oscillation
Bulk movement of electrical energy
conductor gallop or flutter depending on the frequency and amplitude of oscillation. A five-hundred kilovolt (500 kV) three-phase transmission tower in Washington
Electric_power_transmission
Space propulsion system
The gridded ion thruster is a common design for ion thrusters, a highly efficient low-thrust spacecraft propulsion method running on electrical power
Gridded_ion_thruster
Vacuum tube electronic oscillator circuit
the screen grid cancels the positive resistance of the tuned circuit, causing oscillations. As in the dynatron oscillator the control grid can be used
Dynatron_oscillator
Type of neuron
Yartsev, M. M.; Witter, M. P.; Ulanovsky, N. (2011). "Grid cells without theta oscillations in the entorhinal cortex of bats". Nature. 479 (7371): 103–107
Grid_cell
Wire screen used to suppress secondary emission in vacuum tubes
reduces or prevents dynatron oscillations. It is located between the screen grid and the plate electrode (anode). The suppressor grid is used in the pentode
Suppressor_grid
Instrument to measure radio frequency circuits
magnetic field, the field line angle in a vertical plane. Grid dip oscillator (GDO), also called grid dip meter, gate dip meter, dip meter, or just dipper
Grid_dip_oscillator
Instrument for displaying time-varying signals
relation to the reference signal and is useful across a wide range of oscillation frequencies. The dual-beam analog oscilloscope can display two signals
Oscilloscope
Audible vibration that travels via pressure waves in matter
viscous), or the superposition of such propagated oscillation. (b) Auditory sensation evoked by the oscillation described in (a)." This two-part definition
Sound
Propulsion system creating motion without propellant
included the Dean drive, electrogravitics and lifters, gyroscopic and oscillation devices, microwave-cavity thrusters such as the EmDrive and Cannae drive
Reactionless_drive
Neurobiological terminology
Subthreshold membrane potential oscillations are membrane oscillations that do not directly trigger an action potential since they do not reach the necessary
Subthreshold membrane potential oscillations
Subthreshold_membrane_potential_oscillations
Vacuum tube with five electrodes
in series with the screen grid to avoid exceeding the screen grid's power or voltage rating, and to prevent local oscillation. Triode-connection is a useful
Pentode
Frequency used on standard electricity grid in a given area
English) is the nominal frequency of the oscillations of alternating current (AC) in a wide area synchronous grid transmitted from a power station to the
Utility_frequency
causing unintended feedback between plate and grid circuits. This often led to oscillation. These oscillations produced audible whistles or “howling,” a problem
Neutrodyne
Electronic oscillator
or Peltz oscillator) is an electronic oscillator circuit in which the oscillation frequency is determined by a tuned circuit consisting of capacitors and
Cathode_follower_oscillator
passage of the electrons through the grid excites oscillations in a tank circuit attached to the grid, usually consisting of a quarter wavelength of parallel
Barkhausen–Kurz_tube
Device that controls current between electrodes
Edison effect bulbs, Fleming developed a vacuum tube that he termed the oscillation valve because it passed current in only one direction. The cathode was
Vacuum_tube
Oscillating dynamical system with nonlinear damping
working at Philips. Van der Pol found stable oscillations, which he subsequently called relaxation-oscillations and are now known as a type of limit cycle
Van_der_Pol_oscillator
Dutch and Belgian racing driver (born 1997)
Retrieved 30 May 2018. Cooper, Adam (13 April 2018). "Red Bull admits 'foot oscillation' caused Verstappen Bahrain crash". Autosport. Archived from the original
Max_Verstappen
Audio oscillator made by Hewlett-Packard
R., "Variable Frequency Oscillation Generator", published 11 July 1939, issued 6 January 1942 "Variable Frequency Oscillation Generator, US patent 2,268
HP_200A
Power outage in North America
Some towns in Bergen County only momentarily lost power, and had wild oscillations in power line voltage, ranging from about 90 V to 135 V every few minutes
Northeast_blackout_of_2003
Vacuum tube
frequency response, suppress voltage transients and prevent spurious oscillation. 5881 6P3S (6П3С) 6P3S-E (6П3С-E) 7027a 6BG6 6V6 KT66 KT88 6550 6CA7
6L6
Gas-filled tube, electrical switch, rectifier
sawtooth oscillator. The voltage on the grid controls the breakdown voltage and thus the period of oscillation. Thyratron relaxation oscillators were used
Thyratron
Moving wave that has oscillations perpendicular to the direction of the wave
advance. In contrast, a longitudinal wave travels in the direction of its oscillations. All waves move energy from place to place without transporting the matter
Transverse_wave
Vacuum tube used for amplifying radio waves
through grids attached to each side. The buncher grids have an oscillating AC potential across them, produced by standing wave oscillations within the
Klystron
When a particle's interactions with a material cause it to emit new particles
electrons from the cathode strike the anode, and can cause parasitic oscillation. Commonly used secondary emissive materials include alkali antimonide
Secondary_emission
Island country within the Kingdom of the Netherlands
variable from year to year, being strongly linked to the El Niño Southern Oscillation. As little as 200 millimetres or 8 inches may fall in a strong El Niño
Curaçao
Spanish technology startup company
innovation comes from its unusual shape and way of harnessing energy by oscillation; fiberglass and carbon fiber reinforced polymer mast oscillates in the
Vortex_Bladeless
Device for generating microwaves
magnetron oscillations". Proceedings of the Institute of Radio Engineers. 17 (4): 652–59. Okabe, Kinjiro (1930). "On the magnetron oscillation of new type"
Cavity_magnetron
Electrical resonant transformer circuit invented by Nikola Tesla
In Tesla’s early designs, a simple spark gap was used to set up the oscillations in a tuned, radio-frequency transformer. Tesla coils can produce output
Tesla_coil
Single-grid amplifying vacuum tube having three active electrodes
filament or cathode, a grid, and a plate (anode). Developed from Lee De Forest's 1906 Audion, a partial vacuum tube that added a grid electrode to the thermionic
Triode
Celestial coordinate system used to specify the positions of celestial objects
Superimposed on this is a smaller motion of the ecliptic, and a small oscillation of the Earth's axis, nutation. In order to fix the exact primary direction
Equatorial_coordinate_system
Electric circuit that generates sine waves
setting the loop gain to just over unity). The oscillations would build until the vacuum tube's grid would start conducting current, which would increase
Wien_bridge_oscillator
Electronic circuit using positive feedback
around an RF detector stage and operating the circuit below the onset of oscillation. Armstrong's key insight was that radio-frequency energy existed in the
Regenerative_circuit
Type of radio receiver
alternately allowing a resonant circuit to oscillate and then suppressing the oscillation. Edwin Armstrong patented the technique in 1922 as an extension of the
Superregenerative_receiver
Electronic control system
incorporated an electromechanical device that could vary the rate of oscillation of the pendulum, and derived correction signals from a circuit that compared
Phase-locked_loop
Radio receiver with amplifier stages and a detector
oscillations can be expected. It is not employed with pentode and screen-grid amplifiers, however, because the direct-capacity coupling between grid and
Tuned radio frequency receiver
Tuned_radio_frequency_receiver
Type of tetrode vacuum tube
Frequency Oscillation with the Beam Tube". Electronics. pp. 68, 69. Retrieved 7 May 2023. D. Mix (Aug. 1946). "Unstable Signals". QST. p. 26 (Screen-Grid Amplifiers
Beam_tetrode
Local boundary-limited electrical grid
create local oscillations, requiring a thorough small-disturbance stability analysis. Moreover, transition activities between the grid-connected and
Microgrid
Structure used to support an overhead power line
It is usually a lattice or tubular tower made of steel. In electrical grids, transmission towers carry high-voltage, transmission lines that transport
Transmission_tower
voltage could be controlled by the voltage on the grid. This allowed the frequency of the oscillation to be changed electronically. Thyratron oscillators
Pearson–Anson_effect
Types of electrical transformer
electronic oscillator circuit. Each pulse serves to drive resonant sinusoidal oscillations in the tuned winding, and due to resonance a high voltage can be developed
Transformer_types
Neural mechanism
progressively earlier in relation to the phase of the local field potential oscillation with each successive cycle. In place cells, a type of neuron found in
Phase_precession
Electronic device/component that increases the strength of a signal
could increase gain but also make the amplifier unstable and prone to oscillation. Much of the mathematical theory of amplifiers was developed at Bell
Amplifier
Exactly solvable model of coupled oscillators
39. Springer-Verlag, New York. p. 420. Kuramoto Y (1984). Chemical Oscillations, Waves, and Turbulence. New York, NY: Springer-Verlag. Strogatz, Steven
Kuramoto_model
south of 40oS where it is dominated by westerlies. The El Niño–Southern Oscillation leads to changes in the atmospheric circulation patterns (also known
Climate_of_Argentina
American inventor (1873–1961)
1906 issued July 1906; U.S. patent 836,070 "Oscillation Responsive Device" (vacuum tube detector – no grid), filed May 1906, issued November 1906; U.S
Lee_de_Forest
Solar cell power extraction method
solar systems have varying relationships to inverter systems, external grids, battery banks, and other electrical loads. The central problem addressed
Maximum_power_point_tracking
Global meteorological forecasting mathematical model
version accounts more accurately for variables such as the Madden–Julian oscillation and the Saharan Air Layer. In 2018, the processing power was increased
Global_Forecast_System
Type of microscopy using a physical probe
interactions are measured either by measuring the change in amplitude of the oscillation at a constant frequency just off resonance (amplitude modulation) or
Non-contact atomic force microscopy
Non-contact_atomic_force_microscopy
Frequency mixer of a superhet radio
pentagrid converter is a type of radio receiving valve (vacuum tube) with five grids used as the frequency mixer stage of a superheterodyne radio receiver. The
Pentagrid_converter
Strongest type of extratropical cyclone that occurs over Europe
catastrophe insurance loss in Europe. The state of the North Atlantic Oscillation relates strongly to the frequency, intensity, and tracks of European
European_windstorm
Patents and licensing affecting early radio technology
of an audion’s plate signal back to its grid greatly increased amplification and could also produce oscillation. Further experiments carried out during
Patents and licensing in early radio
Patents_and_licensing_in_early_radio
Burst of electromagnetic energy
electromagnetic compatibility Operation Outward Pulsed power Transient (oscillation) Ultrashort pulse Vircator Royal Air Force Common Core and Deployment
Electromagnetic_pulse
Long-baseline neutrino experiment in Japan
T2K ("Tokai to Kamioka") is a particle physics experiment studying the oscillations of the accelerator neutrinos. The experiment is conducted in Japan by
T2K_experiment
French nuclear power plant
The Chooz reactors were a source of neutrinos for the Chooz neutrino oscillation experiment; a new experiment, Double Chooz, was also operating nearby
Chooz_Nuclear_Power_Plant
Power outage in Pakistan
power generation from the northern system, and the grid began to exhibit voltage-current oscillations as reactive power sloshed between the northern and
2023_Pakistan_blackout
Measurement of power meeting specifications
Common Mode Distortion or interharmonics at higher frequencies. The oscillation of voltage and current ideally follows the form of a sine or cosine function
Electric_power_quality
Type of climate model
an ocean grid with higher resolution in the tropics to help resolve processes believed to be important for the El Niño Southern Oscillation (ENSO). Spectral
General_circulation_model
Neutrino detector at the South Pole
neutrino mass hierarchy, precision measurement of atmospheric neutrino oscillation (both tau neutrino appearance and muon neutrino disappearance), and searching
IceCube_Neutrino_Observatory
Mapping brain activity by recording magnetic fields produced by currents in the brain
low-pass network with a slow falloff to minimize positive feedback and oscillation. Built into the system are shaking and degaussing wires. Shaking wires
Magnetoencephalography
Branch of electrical power engineering
techniques and power grid equipment used to limit the damage caused by an electrical fault and safeguard other components of the grid, like generators and
Power_system_protection
Visual illusion
They also can be induced by alternating currents that entrain neural oscillation as with transcranial alternating current stimulation. In this case they
Phosphene
Human-caused changes to climate on Earth
phases of two such processes, Pacific Decadal Oscillation (PDO) and Atlantic Multidecadal Oscillation (AMO) caused a short slower period of warming called
Climate_change
Electromagnetic radiation generated by the thermal motion of particles
and lattice oscillations in a material. Kinetic energy is converted to electromagnetism due to charge-acceleration or dipole oscillation. At room temperature
Thermal_radiation
from the plate back to the grid. Even a small amount of feedback may cause tuning difficulties and perhaps even self oscillation. Coupling of energy from
Valve_transmitters
Instrument for measuring, keeping or indicating time
crystal, which had the potential for more accuracy. All modern clocks use oscillation. Although the mechanisms they use vary, all oscillating clocks, mechanical
Clock
Type of microscopy
most commonly the value of the deflection, the amplitude of an imposed oscillation of the cantilever, or the shift in resonance frequency of the cantilever
Atomic_force_microscopy
Simplifying model for electrical grids
system reduction is the process of simplifying a large and complex electrical grid by replacing less critical parts of the system with reduced equivalent models
Power_system_reduction
Elementary particle involved with rest mass
oscillation will not involve change of energy. Oscillations with unchanged energy imply that excitations (particles) associated with the oscillation are
Higgs_boson
Early radio receiver component
patent 906,991 - Oscillation detector (multiple metallic sulfide detectors), Clifford D. Babcock, 1908 U.S. patent 912,613 - Oscillation detector and rectifier
Crystal_detector
Numerical weather prediction system
the Diurnal Precipitation Cycle with the Passage of a Madden–Julian Oscillation Event through the Maritime Continent". Monthly Weather Review. 144 (5):
Weather Research and Forecasting Model
Weather_Research_and_Forecasting_Model
Type of AC motor
stators. The stator creates a magnetic field that rotates in time with the oscillations of the current. The rotor turns in step with the stator field at the
Synchronous_motor
Gas ionization process
electrical oscillations and waveforms, as in the relaxation oscillator whose schematic is shown in the picture on the right. The sawtooth shaped oscillation generated
Townsend_discharge
Power outages in the United States, Canada and Mexico
reactive power supplied by the McNary dam, the grid was susceptible to a large voltage-frequency oscillation. To the control circuits on the Pacific Intertie
1996 Western North America blackouts
1996_Western_North_America_blackouts
Type of atomic clock
comes from counting oscillations of visible light, which oscillates at approximately 700 quadrillion times a second. These oscillations divide a second into
Optical_clock
British musical equipment manufacturer
and without keyboards, both analogue and virtual analogue synthesisers, grid-based performance controllers, and grooveboxes. Novation's first commercial
Novation Digital Music Systems
Novation_Digital_Music_Systems
Numerical technique to simulate behavior of continuous substances
as the grid must be reset at the end of each MPM calculation step and reinitialised at the beginning of the following step. Spurious oscillation may occur
Material_point_method
Methods used to generate sound waveforms using a computer
case, the synthesizer includes mathematical models of the vocal fold oscillation and associated laryngeal airflow, and the consequent acoustic wave propagation
Physical_modelling_synthesis
American entrepreneur
of digital telephone switching systems and technologies used in the smart grid. In addition to his business endeavors, Oshman was involved in various philanthropic
Ken_Oshman
Finite difference method for numerically solving parabolic differential equations
However, the approximate solutions can still contain (decaying) spurious oscillations if the ratio of time step Δ t {\displaystyle \Delta t} times the thermal
Crank–Nicolson_method
Function for integral Fourier-like transform
A wavelet is a wave-like oscillation with an amplitude that begins at zero, increases or decreases, and then returns to zero one or more times. Wavelets
Wavelet
1656 painting by Diego Velázquez
seen, caught in a moment of stillness, at the neutral centre of his oscillation. His dark torso and bright face are half-way between the visible and
Las_Meninas
resonance (ICR), electron cyclotron resonance (ECR) or lower hybrid oscillation, to produce a high density cold plasma. The cold and dense plasma, produced
Electrodeless_plasma_thruster
Usually unwanted capacitance in a circuit
circuit to oscillate at high frequency. These unwanted oscillations are called parasitic oscillations. In high frequency amplifiers, parasitic capacitance
Parasitic_capacitance
Historical synonym for hertz, the unit of frequency
phenomena such as sound waves having a frequency measurable as a number of oscillations, or cycles, per second. With the organization of the International System
Cycle_per_second
Computational model used in machine learning
quickprop are primarily aimed at accelerating learning. In order to avoid oscillations such as connection weights that cycle between high and low values, and
Neural network (machine learning)
Neural_network_(machine_learning)
Electronic circuit
an additional capacitor (C0) placed in series with the inductor. The oscillation frequency in Hertz (cycles per second) for the circuit in the figure
Clapp_oscillator
GRID OSCILLATION
GRID OSCILLATION
Boy/Male
Norse
A man freed by Skallagrim.
Surname or Lastname
Dutch
Dutch : nickname for a dour and forbidding person, from Middle Dutch grim, grem ‘stern’, ‘severe’.English : nickname with the same meaning as 1, from Old English grim ‘fierce’, ‘grim’.Respelling of German Grimm.
Male
English
Short form of English Gideon, GID means "cutter down; hewer," i.e. "mighty warrior."
Female
Norse
Old Norse myth name of a frost giantess, GRID means "peace."
Boy/Male
Indian
Need, Strong grip
Female
Irish
Irish derived from Gaelic brÃgh, BRÃGHID means "force, strength." In Celtic mythology, this is the name of a goddess, the daughter of Dagda, one of the Tuatha Dé Danann. She is also known by the Gaulish name Brigindos, meaning "exalted one."
Boy/Male
Australian, Polish
To Sell; To Get Rid of
Boy/Male
Norse Vietnamese
Son of Grim.
Boy/Male
Norse
Son of Njal.
Male
Turkish
Turkish name YAVUZ means "grim, stern."
Girl/Female
Norse
A wife of Odin.
Girl/Female
Celtic, French, German, Irish
Strong; Protective
Boy/Male
American, Australian, British, English, German
Brave as a Bear; Form of Bernard; Grim Bear
Girl/Female
Celtic Irish
Strong.
Girl/Female
Assamese, Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Sanskrit, Sindhi, Telugu, Traditional
Get Rid of Everything; Liberated; Pearl
Boy/Male
Australian, Danish, German, Hebrew
Grim Bear; Bear; Courageous; Son of Comfort; Form of Bernard
Boy/Male
Muslim
Need, Strong grip
Male
German
Abbreviated form of German Ägidius, ÄGID means "kid; young goat" or "shield of goatskin."
Boy/Male
Tamil
Saptatala Prabhenthachha | ஸபà¯à®¤à®¾à®¤à®¾à®²à®¾ பà¯à®°à®ªà¯‡à®¨à¯à®¤à®¾à®šà®¾
Rid the curse of the seven tale trees
Saptatala Prabhenthachha | ஸபà¯à®¤à®¾à®¤à®¾à®²à®¾ பà¯à®°à®ªà¯‡à®¨à¯à®¤à®¾à®šà®¾
Boy/Male
Welsh
Legendary son of Eri.
GRID OSCILLATION
GRID OSCILLATION
Boy/Male
Indian, Sanskrit
Unassailable; Invincible; Proud
Girl/Female
English
Feminine of Evan: Young fighter.
Boy/Male
Arabic, Australian, Muslim
Another Name for the Holy Quran
Boy/Male
Tamil
Shreemohan | à®·à¯à®°à¯€à®®à¯‹à®¹à®¨
Lord Krishna
Boy/Male
Muslim
A word in the Quran
Male
Czechoslovakian
, love's peace (or, the world).
Boy/Male
Arabic, Gujarati, Hindu, Indian, Kannada, Marathi, Muslim, Sindhi
Happiness; Joy; Mirth
Male
Norse
 Old Norse name derived form the word rún, RÚNI means "secret lore."
Male
Hebrew
(גְּמַרְיָה) Hebrew name GEMARYAH means "God has accomplished." In the bible, this is the name of the son of Hilkiah who bore Jeremiah's letter to the captive Jews.Â
Male
Scandinavian
Scandinavian form of German Walther, VALTER means "ruler of the army."
GRID OSCILLATION
GRID OSCILLATION
GRID OSCILLATION
GRID OSCILLATION
GRID OSCILLATION
v. i.
To give forth a grating sound, as sand under the feet; to grate; to grind.
p. pr. & vb. n.
of Gride
imp. & p. p.
of Gride
n.
Structure, as adapted to grind or sharpen; as, a hone of good grit.
p. pr. &, vb. n.
of Grit
v. t.
To grind; to rub harshly together; to grate; as, to grit the teeth.
n.
To grin.
p. pr. & vb. n.
of Grin
p. pr. & vb. n.
of Grind
v. i.
To gride. See Gride.
v. t.
To give a grip to; to grasp; to gripe.
v. t.
That by which anything is grasped; a handle or gripe; as, the grip of a sword.
imp. & p. p.
of Rid
a. & n.
from Grind.
n.
A hard, coarse-grained siliceous sandstone; as, millstone grit; -- called also gritrock and gritstone. The name is also applied to a finer sharp-grained sandstone; as, grindstone grit.
imp. & p. p.
of Grit
v. t.
A peculiar mode of clasping the hand, by which members of a secret association recognize or greet, one another; as, a masonic grip.
imp. & p. p.
of Grind
imp. & p. p.
of Grin
v. t.
To prepare; to make ready; to equip; as, to gird one's self for a contest.