Locating fault using voltage sags profile for underground distribution system

Mokhlis, Hazlie; Li, H.Y.; Bakar, Ab Halim Abu; Mohamad, Hasmaini

doi:10.1109/powercon.2010.5666450

Cited by 4 publications

(4 citation statements)

References 11 publications

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“…Due to this, the process of locating fault using the voltage sag concept needs to consider each line as a separate function of fault distance between two adjacent nodes. Instead of [8] using fitting method to estimate the equation of the voltage sags as a function of fault distance, as above-mentioned, we can attain node-voltage function of fault distance and resistance for each section.…”

Section: A Database Establishmentmentioning

confidence: 99%

“…When an actual fault occurs, we get the current In [8], it uses (11) and (12) to estimate possible fault section, which will produce multiple possible fault sections considering the fault resistance. Through multiple simulating, we can know that multiple possible fault sections can be eliminated by using the current measured at substation to estimate additionally.…”

Section: B Fault Section Estimation I) Global Searchmentioning

confidence: 99%

“…In [7]- [8], the technique works by matching during fault voltage sag with simulated data to eliminate multiple estimations. The location method in [7] uses the voltage sag magnitude and phase shift measured at the monitored node to compare with the simulated data and get all possible fault sections.…”

Section: Introductionmentioning

confidence: 99%

“…For each section, the voltage sag function is considered to be linear. Different from [7], the nonlinearity of the function is considered in [8]. There is still deficiency in this method that the function between two adjacent node is derived using the curve fitting method according to several simulated data.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Fault Location for Distribution Networks Based on Node Voltage Equation

Tan

Hong-geng

2012

2012 Asia-Pacific Power and Energy Engineering Conference

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This paper proposed a method to estimate shortcircuit fault location in electrical distribution networks using voltage sags data and current measured at the local substation. With the knowledge of bus impedance matrix, the bus voltage during the fault can be obtained for any fault in the network. Based on the non-liner profile characteristic of voltage sag measured at the bus, the paper proposed a new method. Firstly, voltage quantity for each section is expressed as a function of fault location and resistance base on the bus impedance matrix. The possible fault is estimated by incorporating the real and imaginary part of voltage sags into the node-voltage equation. Then, the method applies rank reasoning analysis to prioritize the possible fault locations due to the same electrical distance. In this method, the uncertainty of fault resistance is also considered. Through simulating for an 11kv typical test distribution network, the method's validity and accuracy are proved.

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Section: A Database Establishmentmentioning

confidence: 99%

Section: B Fault Section Estimation I) Global Searchmentioning

confidence: 99%