Reducing voltage sags through fault current limitation

Tosato, F.; Quaia, S.

doi:10.1109/61.905572

Cited by 79 publications

(22 citation statements)

References 9 publications

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“…A simple searching algorithm is used offline to find the optimum values of α and β for each unbalance factor n. With each pair α, β for a given unbalance factor, the peak values over a line period are computed using (13) and (14). It must be noted that the minimum peak value will be reached when i a peak = i b peak .…”

Section: B Proposed Control Strategymentioning

confidence: 99%

“…The overcurrent will flow until the sag is cleared or the switch that disconnects the source from the grid is opened after the regulated trip time. The use of fuses as overcurrent protection devices is very common in distribution systems, but in weak grids with a high penetration of distributed generation systems, the traditional protection possibilities have been exhausted [13], [14].…”

Section: Introductionmentioning

confidence: 99%

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Control Scheme for Photovoltaic Three-Phase Inverters to Minimize Peak Currents During Unbalanced Grid-Voltage Sags

Miret

Castilla

Camacho

et al. 2012

IEEE Trans. Power Electron.

220

129

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Nowadays, the majority of the photovoltaic (PV) power sources are connected to the public grid. One of the main connection problems occurs when voltage sags appear in the grid due to short circuits, lightning, etc. International standards regulate the grid connection of PV systems, forcing the source to remain connected during short-time grid-voltage faults. As a consequence, during the voltage sag, the source should operate with increasing converter currents to maintain the injection of the generated power. This abnormal operation may result in nondesired system disconnections due to overcurrents. This paper proposes a controller for a PV three-phase inverter that ensures minimum peak values in the grid-injected currents, as compared with conventional controllers. From the system analysis, a design method is presented in order to set the parameters of the control scheme. Selected experimental results are reported in order to validate the effectiveness of the proposed control.Index Terms-Fault ride-through, grid international standards, photovoltaic (PV) power source, voltage sag.

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Section: B Proposed Control Strategymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Control Scheme for Photovoltaic Three-Phase Inverters to Minimize Peak Currents During Unbalanced Grid-Voltage Sags

Miret

Castilla

Camacho

et al. 2012

IEEE Trans. Power Electron.

220

129

View full text Add to dashboard Cite

show abstract

“…But they cannot affect the fault current. Since the voltage sag during the fault is proportional to the short circuit current, an effective fault current limiter, connected to the beginning of feeders, not only limits the large fault current but also improves the reliability [5], stability [6], and the system power quality [7]. In recent years, various types of fault current limiter such as, solid state fault current limiter, resonant circuit and SFCL (Superconducting Fault Current Limiter) have been proposed and developed [8,9].…”

Section: Introductionmentioning

confidence: 99%

A dual-functional bridge type FCL to restore PCC voltage

Firouzi

Gharehpetian

Pishvaei

2013

International Journal of Electrical Power & Energy Systems

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“…The evaluation method on voltage sags in radial and loop power distribution system with SFCL was studied in [1] and [2]. The improvement of voltage sag by SFCLs installed in the various locations of radial distribution system was studied in [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Reliability Cost Evaluation of Power Distribution System with Superconducting Fault Current Limiter

Moon

2014

The Transactions of the Korean Institute of Electrical Engineer

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-In this paper, the effects of superconducting fault current limiter (SFCL) installed in power distribution system on reliability are evaluated and analyzed. The fault current will be decreased in power distribution system with SFCL because of the increased impedance of SFCL. The decreased fault current will improve the voltage drop of the bus of substation. The voltage drop is an important factor of power distribution system reliability. In this paper, improvement of reliability worth is analyzed when SFCLs are installed at the starting point in power distribution system. First, resistor-type SFCL model is used in PSCAD/EMTDC. Next, typical power distribution system is modeled. Finally, when the SFCLs with impedance 0.5 [Ω] are installed in feeder, power distribution system reliability is evaluated. Also, the improvement effect of reliability worth including the effect of voltage sag is analyzed using customer interruption cost according to whether or not SFCL is installed.

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Reducing voltage sags through fault current limitation

Cited by 79 publications

References 9 publications

Control Scheme for Photovoltaic Three-Phase Inverters to Minimize Peak Currents During Unbalanced Grid-Voltage Sags

Control Scheme for Photovoltaic Three-Phase Inverters to Minimize Peak Currents During Unbalanced Grid-Voltage Sags

A dual-functional bridge type FCL to restore PCC voltage

Reliability Cost Evaluation of Power Distribution System with Superconducting Fault Current Limiter

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