'Decoupled method' for studying large interconnected grounding systems using microcomputers. I. Fundamentals

Sobral, S.T.; Fleury, Victor; Villalba, Julia; Mukhedkar, D.

doi:10.1109/61.193953

Cited by 26 publications

(7 citation statements)

References 2 publications

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“…In other works [22,28,29,31,[35][36][37], a simpler procedure named "decoupled method" has been proposed, currently adopted by the International Standard (IEC Std 60909 -3, 2003).…”

Section: Introductionmentioning

confidence: 99%

A method for the evaluation of fault current distribution in complex high voltage networks

Zizzo

Silvestre

Cascia

et al. 2015

Electric Power Systems Research

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“…In other works [22,28,29,31,[35][36][37], a simpler procedure named "decoupled method" has been proposed, currently adopted by the International Standard (IEC Std 60909 -3, 2003).…”

Section: Introductionmentioning

confidence: 99%

A method for the evaluation of fault current distribution in complex high voltage networks

Zizzo

Silvestre

Cascia

et al. 2015

Electric Power Systems Research

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“…In this study, we present a novel model of the electrical power system for a railway system. Manuscript The decoupled technique [3]- [5] is then applied to reduce the coupled model's complexity. The decoupled technique in [3]- [5] is used to analysis the distribution of faulted grounding currents.…”

Section: Introductionmentioning

confidence: 99%

Distribution of earth leakage currents in railway systems with drain auto-transformers

Chou

Hsiao

Wang

et al. 2001

IEEE Trans. Power Delivery

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This work presents a novel advanced methodology to accurately predict the earth leakage currents for analyzing the electrification railway systems with drain auto-transformers. The proposed methodology entails applying a decoupled technique to model the equivalent circuit while simultaneously considering the grounding network and the effects on mutual impedance between feeders. Also presented herein are several study cases, particularly with respect to how grounding resistance, span of auto-transformers, turn-ratio of auto-transformers, and location of ground faults influence the leakage currents. These study cases demonstrate that the computer program based on the proposed methodology can effectively analyze the leakage currents in the planning stage for developing railway systems.

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“…it generates a new point (b') along the line. A plane perpendicular to segment (3)(4) can also pass through the same pipeline point (b) giving rise to the new point (b") along the line. Using the same process, the points (c') and (d') are generated along the line.…”

Section: Vii-additional Points Created By the Program Along Thementioning

confidence: 99%

“…Using the Decoupled Method [3,4,5], these voltages are replaced by equivalent current sources applied at the terminal points of the pipeline segments. The whole pipeline is then replaced by a ladder circuit, composed by cascaded x circuits.…”

Section: Xii-voltage Calculation Along the Pipelinementioning

confidence: 99%

“…This component can not flow away from the ground wires due to the magnetic coupling between ground wires and phases.The non self neutralized component (b)(also called Ground Current) flows to ground through the towers within a region around 5-15 km on both left and right sides of the faulted tower. This extention corresponds to three times the Characteristic Length (also called Space Constant = CE) of the ladder circuit which is formed by the ground wire spans and the tower footing resistances[3,4,5].…”

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confidence: 99%

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Termorio-S.Jose double circuit transmission line crossing several pipelines-modelling problems

Sobral¹,

Ricci²,

Azzam³

2004 IEEE/PES Transmision and Distribution Conference and Exposition: Latin America (IEEE Cat. No. 04EX956)

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Abstruct-This article reports the procedures used to determine the voltage applied upon several pipelines crossing the 138 kV double circuit Termorio-S.Jose transmission line. During a fault to ground, the current flowing along one of the circuits can differ, in terms of value and direction from the current flowing in the other circuit. This fact gives rise to the need of special simulation techniques which are dealt here. This article also presents a summary of the basic calculation procedures used to determine the voltage difference which appears across the pipeline insulation (between metal and ground), when a fault occurs on the transmission line crossed by the pipeline. This voltage difference should not exceed 5kV for sa€ety reasons.

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'Decoupled method' for studying large interconnected grounding systems using microcomputers. I. Fundamentals

Cited by 26 publications

References 2 publications

A method for the evaluation of fault current distribution in complex high voltage networks

A method for the evaluation of fault current distribution in complex high voltage networks

Distribution of earth leakage currents in railway systems with drain auto-transformers

Termorio-S.Jose double circuit transmission line crossing several pipelines-modelling problems

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