Experimental measuring of the earth faults currents in MV compensated networks

The MV compensated Networks in Czech Republic are operated as nonsymmetrical, that means as networks with non-transposed lines. The paper deals with experiments which were realized in distribution network held by E.ON Czech Republic. There were made a few different faults (low-impedance, spark gap arc, damaged MV cable, 1.6 k:, 4 k: and unearthed console of concrete tower) for three different places, for tuned and untuned Petersen coil and for some types of faults for all phases too, that means forty eight experimental faults. During each experiment the shunting of affected phase was applied.

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“…The scheme of experiment is shown on Fig. 1 [3], [5]. At first the workplace was prepared and the measurement equipments were connected.…”

Section: Experiments [3] [5]mentioning

confidence: 99%

Experimental analysis of electrical values during earth faults

Toman

Dvořák

Orságová

et al. 2010

Proceedings of the 2010 Electric Power Quality and Supply Reliability Conference

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“…Moreover, currents measurements were conducted during a real MV single line to ground fault (SLGF) to evaluate the effects of the ESs interconnection by experience [9], [10], [11], [12], [13].…”

Section: Introductionmentioning

confidence: 99%

A Comparative Review of the Methodologies to Identify a Global Earthing System

Colella

Pons

Tommasini

2017

IEEE Trans. on Ind. Applicat.

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International Standards IEC 61936-1 and EN 50522 define a Global Earthing System (GES) as the earthing network, created by the interconnection of local earthing systems, that should guarantee the absence of dangerous touch voltages. Despite that, Standards do not provide any official practical guidelines for its identification. The official classification of GES areas would lead to a simplification of the design and verification procedures of MV/LV substations grounding systems, with associated economical savings for both Distribution System Operators (DSOs) and MV users. To overcome this regulatory vacuum, several teams of researchers proposed methods to identify the presence of a GES. In this paper, the main methods developed to identify a GES are presented. The different methodologies are applied to a real urban scenario and compared.

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“…1). The detailed description of the method can be found in [1][2][3][4][5][6][7][8]. There is no doubt that the method yields positive results in case of resistive earth faults that represent a vast majority of all earth faults in MV distribution networks.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of different solutions of faulted phase earthing technique for an earth fault current limitation

Topolánek¹,

Dvořák²,

Toman³

et al. 2017

CIRED - Open Access Proceedings Journal

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The study is focused on evaluation of different types of prototypes of automatics for additional faulted phase earthing (FPE), which are used for earth fault (EF) current reduction in resonant earthed distribution network. Three prototypes of these automatics have been installed in Czech distribution network, the first one utilises direct connection of faulty phase-to-earthing system of supply substation, the second one utilises connection through resistor and the last one through reactor. The contribution is mainly focused on detail analysis of operational differences of these types of FPE systems based on case study of compensated distribution network. The main aim is to specify and describe benefits and disadvantages of individual FPE applications. The results could be used for evaluation of best solution of FPE application which could be chosen for an EF current reduction in compensated distribution network.

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Experimental measuring of the earth faults currents in MV compensated networks

Cited by 8 publications

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Experimental analysis of electrical values during earth faults

Experimental analysis of electrical values during earth faults

A Comparative Review of the Methodologies to Identify a Global Earthing System

Evaluation of different solutions of faulted phase earthing technique for an earth fault current limitation

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