Proximity effect and magnetic field calculation in GIL and in isolated phase bus ducts

Benato, Roberto; Dughiero, Fabrizio; Forzan, Michele; Paolucci, Antonio

doi:10.1109/20.996202

Cited by 61 publications

(35 citation statements)

References 3 publications

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“…Comparing with the overhead lines and XLPE-insulated cables, the advantages of GIL are obvious [1][2][3]. The power transmission capacity of GIL is comparable with overhead lines, while the transmission losses are much lower.…”

Section: Introductionmentioning

confidence: 79%

Analytical Calculation of Coupled Magnetothermal Problem in Gas Insulated Transmission Lines

2013

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Section: Introductionmentioning

confidence: 79%

Analytical Calculation of Coupled Magnetothermal Problem in Gas Insulated Transmission Lines

2013

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“…The power of the self-made MCA is the applicability to very different systems, e.g., HVDC armoured cables [6], gas insulated lines [7][8][9], overhead lines with one or more earth-wires [10,11] and ac high speed railways [12]. In this paper, the MCA has been applied to a single-core CB UGC with shunt compensation.…”

Section: Discussionmentioning

confidence: 99%

Steady State Assessment of Shunt Compensated EHV Insulated Cables by Means of Multiconductor Cell Analysis (MCA)

Benato

2012

Energies

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Abstract:The author has already presented some papers which allow studying cable systems by means of the multiconductor cell analysis (MCA). This method considers the cable system in its real asymmetry without simplified and approximated hypotheses. The multiconductor matrix procedure based on the use of admittance matrices, which account for the line cells (with earth return currents), different types of screen bonding, possible multiple circuits (single and double circuit or more), allows predicting the steady-state regime of any cable system. In the previous papers, these matrix algorithms have been presented with reference to a short extra-high voltage (EHV) double-circuit cross-bonded (CB) underground cable (UGC) system. Since the cable link was short, the shunt reactive compensation was not necessary and consequently not considered. In this paper the procedure is generalized in order to take into account three single-phase (or also one three-phase) reactors installed at the cable ends or also at intermediate locations.

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“…Starting from the new values of the material conductivity (at this new phase conductors and shields temperatures), new resistance values are computed from (14) for each and every filament associated with all phase conductors and shields. With that, the system of equations in (4) is constructed again and numerically solved for the filament currents.…”

Section: Power Losses and Temperature Increasementioning

confidence: 99%

“…Additionally, shields of different phases are mutually bonded (i.e., short-circuited with appropriate current-carrying conductors) along the route, both for the high-current busducts and GIL systems. This establishes the current paths for the so-called circulating currents (along with eddy currents) in the shields, which oppose the phase currents (inducing them) through the strong electromagnetic coupling (additionally influenced by the skin and proximity effects), e.g., [12,13,14].…”

Section: Introductionmentioning

confidence: 99%

Coupled Electromagnetic and Thermal Analysis of Single-Phase Insulated High-Current Busducts and GIL Systems

Sarajčev¹,

Martinac²,

Radic³

2013

AJEEE

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This paper presents a mathematical model for the coupled electromagnetic and thermal analysis of the single-phase insulated high-current busducts of circular cross-section geometry and of gas-insulated transmission lines (GIL). The mathematical model, accompanied by a numerical solution procedure, features an exact current distribution in phase conductors and shields of the busduct or GIL system, accounting for the skin and proximity effects, and including the complete electromagnetic coupling between phase conductors and shields. The current distribution is based on the conductor filament method in combination with the mesh-current method. The mathematical model further couples the analysis of current distribution with the computation of (Joule) power losses and subsequent temperature increase in the high-current busducts or GIL systems, accounting for the material properties (electrical conductivity, thermal emission and convection coefficients) as well as for the surrounding ambient properties (ambient temperature, wind and solar radiation influences).

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Proximity effect and magnetic field calculation in GIL and in isolated phase bus ducts

Cited by 61 publications

References 3 publications

Analytical Calculation of Coupled Magnetothermal Problem in Gas Insulated Transmission Lines

Analytical Calculation of Coupled Magnetothermal Problem in Gas Insulated Transmission Lines

Steady State Assessment of Shunt Compensated EHV Insulated Cables by Means of Multiconductor Cell Analysis (MCA)

Coupled Electromagnetic and Thermal Analysis of Single-Phase Insulated High-Current Busducts and GIL Systems

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