Power Loss Computation in High-current Generator Bus Ducts of Rectangular Cross-section

Sarajčev, Petar; Goić, Ranko

doi:10.1080/15325001003735192

Cited by 13 publications

(48 citation statements)

References 9 publications

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“…Figure 1 depicts a part of the geometry involved in deriving the self and the mutual GMD of phase conductor and/or shield filaments. For the arbitrary i-th filament of a rectangular cross section, the self GMD is given by [12]:…”

Section: Conductor Filamentsmentioning

confidence: 99%

“…Also, GMD between any two filaments of the busduct (or GIL) system is given as a geometrical distance between their central points, i.e., the GMD between the i-th and the k-th filament is given by [12]:…”

Section: Conductor Filamentsmentioning

confidence: 99%

“…A following general system of complex linear algebraic equations could be formed for the system of conductor filaments [12]:…”

Section: Current Distributionmentioning

confidence: 99%

“…Hence, the total number of filaments equals N = 3Nc + 3Ns. Mentioned numbers of filaments for the phase conductors and shields are chosen in such a manner that the current density remains uniform across the surface (of each) of the filaments [12].…”

Section: Conductor Filamentsmentioning

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%

See 4 more Smart Citations

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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Section: Conductor Filamentsmentioning

confidence: 99%

Section: Conductor Filamentsmentioning

confidence: 99%

“…A following general system of complex linear algebraic equations could be formed for the system of conductor filaments [12]:…”

Section: Current Distributionmentioning

confidence: 99%

Section: Conductor Filamentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

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

Sarajčev¹,

Martinac²,

Radic³

2013

AJEEE

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Magnetic field of a ribbon busbar of finite length

2018

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Analysis of Electromagnetic Influences Concerning Two Adjacent Parallel High-current Bus Ducts

Sarajčev

2012

Electric Power Components and Systems

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Due to the medium-voltage level of generator terminals and very high current output, generator connection to the step-up transformer is often accomplished by means of high-current air-insulated bus duct systems. These high currents during normal generator operation produce accompanying power losses, which could result in excessive heating of the bus duct system. Additionally, the associated electromagnetic fields could have adverse effects on the performance of the neighboring equipment. Problems are further exacerbated by the fact that there are often two parallel adjacent systems, often equal in cross-sectional geometry, which interact through the electromagnetic coupling. The starting point for the analysis of the aforementioned problems involves a determination of current distribution in phase conductors and in the shields of the metal-enclosed bus duct systems. This article presents a computation model for the mentioned analysis, which is based on the mesh-current method, with the application of the geometric mean distance method in combination with the conductor filament method. It takes into account both skin effect and proximity effects, as well as the complete electromagnetic coupling between phase conductors and metal enclosures of two mutually parallel and adjacent high-current bus duct systems having equal cross-sectional geometry.

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Power Loss Computation in High-current Generator Bus Ducts of Rectangular Cross-section

Cited by 13 publications

References 9 publications

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

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

Magnetic field of a ribbon busbar of finite length

Analysis of Electromagnetic Influences Concerning Two Adjacent Parallel High-current Bus Ducts

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