Search results for "fault current limiter"

showing 6 items of 6 documents

Currents Distribution During a Fault in an MV Network: Methods and Measurements

2016

When a single line to ground fault happens on the MV side of a HV/MV system, only a small portion of the fault current is injected into the ground by the ground-grid of the faulty substation. In fact the fault current is distributed between grounding electrodes and MV cables sheaths. In systems with isolated neutral or with resonant earthing this may be sufficient to provide safety from electric shock. Experimental measurements were performed on a real MV distribution network: a real single line to ground fault was made and fault currents were measured in the faulty substation and in four neighboring substations. In this paper the problem of fault current distribution is introduced, the tes…

EngineeringDistribution (number theory)020209 energyGlobal earthing system02 engineering and technologyglobal earthing systemsFault (power engineering)Industrial and Manufacturing EngineeringFault current limiter0202 electrical engineering electronic engineering information engineeringmedicineCurrent distributionElectrical and Electronic EngineeringElectrical conductorsingle line to ground faultglobal earthing systems (GESs)Current distribution electrical safety global earthing systems (GESs) grounding power distribution faults power system faults single line to ground fault (SLGF)business.industryGroundElectric shockElectrical engineeringpower system faultsgroundingmedicine.diseaseGridSingle linecurrent distribution; electrical safety; global earthing systems; grounding; power distribution faults; power system faults; single line to ground fault; control and systems engineering; industrial and manufacturing engineering; electrical and electronic engineeringSettore ING-IND/33 - Sistemi Elettrici Per L'EnergiaSettore ING-IND/31 - ElettrotecnicaPower system faultControl and Systems Engineeringsingle line to ground fault (SLGF)power distribution faultselectrical safetybusinessCurrent distribution; electrical safety; global earthing systems (GESs); grounding; power distribution faults; power system faults; single line to ground fault (SLGF); Control and Systems Engineering; Industrial and Manufacturing Engineering; Electrical and Electronic EngineeringPower distribution fault
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Arc Fault Detection Method Based on CZT Low-Frequency Harmonic Current Analysis

2017

This paper presents a method for the detection of series arc faults in electrical circuits, which has been developed starting from an experimental characterization of the arc fault phenomenon and an arcing current study in several test conditions. Starting from this, the authors have found that is it possible to suitably detect arc faults by means of a high-resolution low-frequency harmonic analysis of current signal, based on chirp zeta transform, and a proper set of indicators. The proposed method effectiveness is shown by means of experimental tests, which were carried in both arcing and nonarcing conditions and in the presence of different loads, chosen according to the UL 1699 standard…

Engineeringarc fault detection020209 energyseries arcsArc-fault circuit interrupter02 engineering and technologyUL 1699Fault detection and isolationlaw.inventionHarmonic analysisElectric arcarc fault circuit interrupter (AFCI)Arc dischargeslawArc discharges arc fault circuit interrupter (AFCI) arc fault detection electrical safety fault diagnosis home protection interrupters power system harmonics power system measurements series arcs UL 1699Fault current limiterhome protection0202 electrical engineering electronic engineering information engineeringElectronic engineeringElectrical and Electronic EngineeringInstrumentationpower system harmonicsinterruptersbusiness.industry020208 electrical & electronic engineeringfault diagnosispower system measurementsFault indicatorElectrical networkHarmonicelectrical safetybusinessSettore ING-INF/07 - Misure Elettriche E Elettroniche
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Current and Voltage Behaviour During a Fault in a HV/MV System: Methods and Measurements

2015

When a single line to ground fault happens on the MV side of a HV/MV system, only a small portion of the fault current is injected into the ground by the ground-grid of the faulty substation. In fact the fault current is distributed between grounding electrodes and MV cables sheaths. In systems with isolated neutral or with resonant earthing this may be sufficient to provide safety from electric shock. Experimental measurements were performed on a real MV distribution network: a real single line to ground fault was made and fault currents were measured in the faulty substation and in four neighbouring substations. In this paper the problem of fault current distribution is introduced, the te…

Engineeringelectrical and electronic engineeringGlobal earthing systemCurrent distribution; Electrical safety; Global earthing systems; grounding; Power distribution faults; Single line to ground faultHardware_PERFORMANCEANDRELIABILITYFault (power engineering)Fault current limiterElectronic engineeringmedicineGlobal earthing systemscurrent distribution; electrical safety; global earthing systems; grounding; power distribution faults; single line to ground fault; electrical and electronic engineering; energy engineering and power technologyenergy engineering and power technologyCurrent distributionPower distribution faultsElectrical safetySingle line to ground faultElectric shockGroundbusiness.industryElectrical engineeringgroundingSingle linemedicine.diseaseEarthing systemSettore ING-IND/33 - Sistemi Elettrici Per L'EnergiaSettore ING-IND/31 - ElettrotecnicaCurrent (fluid)businessPower distribution faultVoltage
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Performance Improvement of Grid-Integrated Doubly Fed Induction Generator under Asymmetrical and Symmetrical Faults

2023

The doubly fed induction generator (DFIG)-based wind energy conversion system (WECS) suffers from voltage and frequency fluctuations due to the stochastic nature of wind speed as well as nonlinear loads. Moreover, the high penetration of wind energy into the power grid is a challenge for its smooth operation. Hence, symmetrical faults are most intense, inflicting the stator winding to low voltage, disturbing the low-voltage ride-through (LVRT) functionality of a DFIG. The vector control strategy with proportional–integral (PI) controllers was used to control rotor-side converter (RSC) and grid-side converter (GSC) parameters. During a symmetrical fault, however, a series grid-side converter…

series grid-side converterControl and OptimizationRenewable Energy Sustainability and the EnvironmentEnergy Engineering and Power TechnologyBuilding and Constructiondoubly fed induction generator; wind energy conversion system; point of common coupling; low-voltage ride-through; fault current limiter; series grid-side converterDoubly fed induction generatorlow-voltage ride-throughSettore ING-IND/33 - Sistemi Elettrici Per L'Energiawind energy conversion systempoint of common couplingElectrical and Electronic EngineeringEngineering (miscellaneous)fault current limiterEnergy (miscellaneous)Energies; Volume 16; Issue 8; Pages: 3350
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Control of solid-state fault current limiter for DG-integrated distribution systems

2017

Fault current limier (FCL) is a device that limits the system current under fault conditions without disconnecting the system and affecting the power system protection components such as circuit breakers. Many types of FCLs have been proposed to limit the magnitude of the fault current. Solid-state fault current limiters (SSFCLs) can limit the peak value of the fault current by applying several methods, such as controlling the system impedance or controlling the voltage that appears across the fault. In this paper, a new control scheme for the SSFCL circuit is presented. The control method is based on controlling the duty cycle of solid state switches to control the rms value of the system …

Engineeringdistributed generationbusiness.industrySolid-state relay020208 electrical & electronic engineeringHardware_PERFORMANCEANDRELIABILITY02 engineering and technologyFault (power engineering)01 natural sciencesFault indicatorSettore ING-IND/33 - Sistemi Elettrici Per L'EnergiaControl theoryDuty cycleduty cycle0103 physical sciencesFault current limiter0202 electrical engineering electronic engineering information engineeringElectronic engineering010306 general physicsbusinessPower-system protectionsolid state fault current limiterElectrical impedanceCircuit breakerFault current limiter2017 IEEE International Conference on Environment and Electrical Engineering and 2017 IEEE Industrial and Commercial Power Systems Europe (EEEIC / I&CPS Europe)
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Reducing DC Link Voltage Unbalance in a Fault-Tolerant Inverter

2014

Today, continuous working of power inverter drives is mandatory for several applications. Damages to materials, machines or even risks to human life have to be absolutely avoided. In the literature, fault-tolerant algorithms and architectures to achieve a successful fault handling are investigated. Researchers aim at reducing the number and cost of additional components, improving at the same time the inverter performances under postfault conditions. Cost, post-fault power derating and increasing distortion are usually conflicting requirements. In this paper, a fault-tolerant three phase inverter is presented. A reconfigurable architecture and a novel fault-tolerant algorithm is designed to…

Engineeringbusiness.industryDc link voltageFault current limiterElectronic engineeringInverterFault toleranceSettore ING-IND/32 - Convertitori Macchine E Azionamenti ElettricibusinessPower electronics Power converters AC motor drives fault-tolerant Inverter
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