Characterization of the ground impedance of rural MV lines on Hydro-Quebec's system

Rajotte, Y.; Fortin, J.; Cyr, B.; Raymond, G

doi:10.1049/cp:19970486

Cited by 6 publications

(3 citation statements)

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“…In North America residential loads are fed by single phase MV/LV transformers and MV lines are thus equipped with a neutral conductor to ensure the return of the unbalance load current. All the grounds along the line, including those of customers, are connected to the neutral conductor and constitute an extended grounding system called "multigrounded neutral" [15], [16], [17].…”

Section: Structure Of MV Distribution Systemsmentioning

confidence: 99%

Impact of MV Ground Fault Current Distribution on Global Earthing Systems

Pons

Colella

Napoli

et al. 2015

IEEE Trans. on Ind. Applicat.

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Global Earthing Systems (GES), created by the interconnection of local earthing systems, should guarantee the absence of dangerous touch voltages. One of the reasons for this safety characteristic of GES is the fault current distribution between grounding electrodes and MV cables sheaths: only a small portion of the fault current is injected into the ground by the ground-grid of the faulty substation. In systems with isolated neutral or with resonant earthing this effect may be sufficient to provide safety from electric shock. In this paper a model describing the behavior of the MV distribution system with interconnected grounding electrodes during a ground fault is built. It is then used to analyze the impact of different factors on the fault current distribution. A sensitivity analysis is performed varying the main parameters and the results are used to draw some conclusions on the current distribution influence on global earthing systems.

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Section: Structure Of MV Distribution Systemsmentioning

confidence: 99%

Impact of MV Ground Fault Current Distribution on Global Earthing Systems

Pons

Colella

Napoli

et al. 2015

IEEE Trans. on Ind. Applicat.

View full text Add to dashboard Cite

show abstract

“…In the past, a lot of studies have been done for single circuit multi-grounded configurations and a great deal of literature is available [1][2][3][4][5][6][7][8][9][10], but limited work has studied the composite systems comprised of multiple multi-grounded conductors. Mostly computer-based methods were preferred for the studies of multigrounded systems.…”

Section: Introductionmentioning

confidence: 99%

“…Alternatively, analytical methods can be developed to compensate such shortcomings. Computer models were used to estimate the GPR of the multi-grounded neutral (MGN) in [2][3][4] and power flow studies were performed in [5][6][7]. Analytical approaches for the GPR analysis were proposed in [8][9][10].…”

Section: Introductionmentioning

confidence: 99%