Location of the earth faults in MV compensated networks

Toman, Petr; Orsigova, J.; Topolánek, David

doi:10.1049/cp:20080058

Cited by 5 publications

(6 citation statements)

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“…Firstly, their analysis [18] was based on analyzing the advantages or disadvantages of using fundamentalfrequency versus ripple control signal injection (interharmonics, mostly 216,66 Hz) in MV ringed networks. For this purpose, the theory worked out by the Haefely-Trench company was used by simulating in MATLAB the injection of a remote control signal (HDO).…”

Section: B Impedance Based Techniquesmentioning

confidence: 99%

“…In this regard [21][22][23], the three ancillary balancing tunable suppression coils, connected to the busbar of the distribution substation, have an interharmonic frequency signal generator connected in its secondary winding. By means of the higher interharmonic signal injected to the affected phase, it is possible to obtain the fault distance using impedance calculations.…”

Section: B Impedance Based Techniquesmentioning

confidence: 99%

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Signal injection techniques for fault location in distribution networks

Buigues

Valverde²,

Zamora³

et al. 2012

REPQJ

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Abstract. Over the last 50 years, fault location in transmission systems has been a subject of interest to utility engineers and researchers. Nevertheless, it has not been until the last decades that fault location in distribution networks has started to gain prominence.Traditionally, fault location techniques for distribution networks have been classified in three different groups: fundamental frequency measurements, high frequency measurements and the use of artificial intelligence (AI). Yet despite this rigid classification, a new approach has started to be developed over the last years based on the injection of a discernible signal into the distribution systems, mainly in non-effectively grounded networks. However, even when recent developments of new grounding systems reinforce the possibility of using this kind of techniques, these are not usually cited by general reviews and overviews of fault location systems in distribution networks. Accordingly, this paper aims to provide a general but clear overview on the existing techniques for fault location in distribution networks based on signal injection. Apart from describing the different options presented to date, the most important aspects that characterize them and the injected signal are briefly outlined, as well as a comparative performance analysis.

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Section: B Impedance Based Techniquesmentioning

confidence: 99%

Section: B Impedance Based Techniquesmentioning

confidence: 99%

Signal injection techniques for fault location in distribution networks

Buigues

Valverde²,

Zamora³

et al. 2012

REPQJ

View full text Add to dashboard Cite

show abstract

“…Transients and/or sinusoidal injection was performed through extra voltage transformers [28] [29] or by the short-circuit of the compensation coil [30] [31] . By tracing the injected signal, the faulted line is detected.…”

Section: Introductionmentioning

confidence: 99%

Marine Power Distribution System Fault Location Using a Portable Injection Unit

Jia

Liu

Christopher

et al. 2015

IEEE Trans. Power Delivery

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A note on versions:The version presented here may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the repository url above for details on accessing the published version and note that access may require a subscription.For more information, please contact eprints@nottingham.ac.uk 1  Abstract--A portable injection unit for Active Impedance Estimation (AIE) is built and tested in a DC zonal marine power distribution system to provide useful information for system protection and restoration. The portable unit generates current "spikes" and injects them into the system once short circuit faults are detected (by measuring the system voltage drop). The faulted system impedance can be estimated by AIE and comparing the estimated impedance with the pre-calibrated value, the fault location can be determined. The proposed method does not rely on system fault transient information or communication from the remote-end measurement and offers fast and accurate fault location in DC marine distribution systems. The proposed method has been tested and validated on a 750V, 2 MW twin bus DC Commercial Test Facility with the system both de-energised and energised.

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“…Injection was done through an extra voltage transformers [17], [18] or by short circuiting the compensation coil [19], [20]. Detection of faulted line is done by tracing the injected signal.…”

mentioning

confidence: 99%

An Accurate Noniterative Fault-Location Technique for Low-Voltage DC Microgrid

Mohanty

Balaji

Pradhan

2016

IEEE Trans. Power Delivery

130

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The least erroneous knowledge on fault location in distribution system helps for restoration process, expedite maintenance and reduce power outage duration. A fault location method using probe power unit (PPU) in DC microgrid assumes that the natural frequency of the system is equal to damped resonant frequency of probe current. This assumption leads to prominent error in fault location calculation. To estimate location of fault in low voltage DC microgrid system, a noniterative fault location technique using PPU is proposed in this paper. Considering damping frequency and attenuation of the probe current, which is a function of fault distance and damping coefficient, fault location is obtained. The technique is tested for high resistance fault and radial and looped topologies and found to be more accurate.

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Location of the earth faults in MV compensated networks

Cited by 5 publications

References 0 publications

Signal injection techniques for fault location in distribution networks

Signal injection techniques for fault location in distribution networks

Marine Power Distribution System Fault Location Using a Portable Injection Unit

An Accurate Noniterative Fault-Location Technique for Low-Voltage DC Microgrid

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