Support the work of Earth fault passage indicator in MV grid

Lorenc, Józef; Andruszkiewicz, Jerzy; Staszak, Bogdan; Olejnik, Bartosz; Balcerek, P.

doi:10.1109/epnet.2016.7999354

Cited by 2 publications

(3 citation statements)

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“…Measurement can be performed locally with the use of voltage transformers or sensors. The literature also provides another possibility -remote transmission of information about U 0 from the MV switchgear [28]. This solution seems to be the most advantageous, provided that high-speed data transmission technology is used.…”

Section: Discussionmentioning

confidence: 99%

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Adaptive Zero-Sequence Overcurrent Criterion for Earth Fault Detection for Fault Current Passage Indicators in Resistor Grounded Medium Voltage Networks

Olejnik

2021

IEEE Access

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Earth faults are the most common disturbances in medium voltage networks. They cause threats to equipment and people, and reduce the quality and reliability of electricity supply. Detection and localization of earth faults is a key challenge to network operators, therefore it is important to constantly develop criteria that allow for an unequivocal assessment of the current network state. This article focuses analysis of effectiveness of classic zero-sequence overcurrent criterion and on modification of the zerosequence overcurrent criterion applied in fault current passage indicators, which are the devices used to effectively detect and locate earth faults. Two new adaptation criteria for networks with resistor grounded neutral point have been proposed, which enable significant improvement of the effectiveness of earth faults detection, in particular high impedance ones. The effectiveness of the criteria was verified computationally and in simulations. In certain situations, the proposed solutions may be over 40% more effective than the classic criterion. The value of detected transition resistance R F also increases significantly. All the abovementioned advantages make their potential use in practice very beneficial.

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Section: Discussionmentioning

confidence: 99%

“…The FCPI equipment is often used by dispatchers for the operation of medium voltage networks both in normal and emergency states, and they are also important elements of smart FDIR (Fault Detection, Isolation and Restoration) systems [26], [27]. In case of earth faults, FCPIs operate mostly by measuring only the zero-sequence current I 0 [28]- [30].…”

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confidence: 99%

Adaptive Zero-Sequence Overcurrent Criterion for Earth Fault Detection for Fault Current Passage Indicators in Resistor Grounded Medium Voltage Networks

Olejnik

2021

IEEE Access

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“…Once the fault has been isolated and there is no voltage in the network, the switchdisconnectors can then be operated through the telecontrol system. These devices include another element to detect the passage of the fault without sending a trip order known as DFPI [37]. As mentioned before current in the network can flow in both directions, it is very important to use the above directional protection to detect the fault.…”

Section: Figure 2 Directional Fault In a Meshed Distribution Networkmentioning

confidence: 99%