General Equations for Fault Currents in Transmission Line Ground Wires

DeSieno, C. F.; Marchenko, Peter P.; Vassell, Gregory S.

doi:10.1109/tpas.1970.292773

Cited by 22 publications

(3 citation statements)

References 4 publications

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“…Due to the symmetrical characteristics of the circuit, the impedance Z n=2 can be obtained by Equation (12).…”

Section: Islanded Multi-grounded Neutral Wire Current Calculationmentioning

confidence: 99%

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Shielding effect of multi-grounded neutral wire in the distribution system

Wang¹,

Acharya²,

Xu³

2010

Euro. Trans. Electr. Power

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SUMMARYThe voltage induced by the power line on the nearby conductors, like telephone lines and pipelines, is investigated in this paper. The relationship between the phase currents and the neutral current plays an important role in reducing the induced voltage. Firstly, the impact of the MGN (multi-grounded neutral) configurations on the induced voltage is analyzed. It is found that the MGN-I (Islanded MGN) is the most practical configuration to reduce the induced voltage. Then a new method to calculate the neutral current for MGN-I is proposed. Based on the proposed method, a series of charts for neutral wire selections are given to facilitate the field engineers select the proper neutral wire. Finally, the validation of the proposed method is verified by the results obtained from EMTP-based multiphase harmonic load flow (MHLF) program.

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“…Due to the symmetrical characteristics of the circuit, the impedance Z n=2 can be obtained by Equation (12).…”

Section: Islanded Multi-grounded Neutral Wire Current Calculationmentioning

confidence: 99%

“…To simplify the induced voltage calculation, we assume that the current flowing in each shielding wire segment is the same by ignoring the end-effect [12]. Then the average current of each segment can be obtained by Equation (15).…”

Section: Shielding Effect Of Mgn-i Neutral Wirementioning

confidence: 99%

Shielding effect of multi-grounded neutral wire in the distribution system

Wang¹,

Acharya²,

Xu³

2010

Euro. Trans. Electr. Power

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“…After the elements of 2 are determined, (2) and the specification of the termination at the remote end of the line allow the evaluation of the currents and the voltages at the remote end. The current distribution along the neutral is obtained by applying (17) to each of the phase currents.…”

Section: Power Line Voltages and Currentsmentioning

confidence: 99%

Computation of fault currents and voltages along a multigrounded neutral power line having multiple phase conductors

Levey¹

1991

IEEE Trans. Power Delivery

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A procedure is described for determining the distribution of currents and voltages to remote earth along a faulted multigrounded neutral power line that has an arbitrary number of phase conductors. Line capacitances are omitted; otherwise, the parameters of the line, its sources, and the locations and impedances of the grounds are not restricted. The open-circuit impedance matrix of the line at the fault site is derived first; from this, the local voltages and currents are obtained. These are utilized to compute the voltages and currents elsewhere along the line. All network analyses that are required by the procedure are confined to a simplified "neutral ladder" network. The neutral ladder is determined by the neutral conductor and the paths to ground from it; however, it is independent of the phase conductors and all of the mutual impedances of the line. The neutral ladder reduces the computational effort required for numerical evaluations and offers insights into characteristics of the voltage and current distributions along the neutral conductor. As an example, an analysis of a faulted, doublefed, three-phase line is provided.

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Computation of inducing current in transmission systems during fault by the combined use of symmetrical coordinate method and ladder‐type network theory

Mori

Sakai

1979

Electrical Engineering Japan

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General Equations for Fault Currents in Transmission Line Ground Wires

Cited by 22 publications

References 4 publications

Shielding effect of multi-grounded neutral wire in the distribution system

Shielding effect of multi-grounded neutral wire in the distribution system

Computation of fault currents and voltages along a multigrounded neutral power line having multiple phase conductors

Computation of inducing current in transmission systems during fault by the combined use of symmetrical coordinate method and ladder‐type network theory

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