Solution of coupled electromagnetic and thermal problems in gas-insulated transmission lines

Benato, Roberto; Dughiero, Fabrizio

doi:10.1109/tmag.2003.810393

Cited by 46 publications

(32 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…From the above obtained power losses, the temperature increase of the busduct (or GIL) phase conductors and shields are determined for each of the phases as follows (equations are here provided for the phase L1 only), [24,25,26 (15) and (16), with particular emphasis on the wind influence, consult [25]. These equations were in-fact derived by the application of the well-known Stefan-Boltzman formula for the radiative heat transfer, where various constants have been experimentally obtained, see [25] for additional information and necessary explanations.…”

Section: Power Losses and Temperature Increasementioning

confidence: 99%

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

Sarajčev¹,

Martinac²,

Radic³

2013

AJEEE

View full text Add to dashboard Cite

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).

show abstract

Section: Power Losses and Temperature Increasementioning

confidence: 99%

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

Sarajčev¹,

Martinac²,

Radic³

2013

AJEEE

View full text Add to dashboard Cite

show abstract

“…DC-GIE received much attention due to the rapid development of high-voltage DC (HVDC) transmission and flexible HVDC technologies [6][7][8][9][10][11]. However, when partial discharge (PD) occurs inside the equipment, this phenomenon can decompose SF 6 and generate a series of low-fluorine sulfides (such as SF 5 , SF 4 , SF 3 , and SF 2 ). These low-fluorine sulfides then react with the trace moisture and oxygen that inevitably exist in the equipment, thus generating some stable decomposition products, such as SO 2 F 2 , SOF 2 , SO 2 , CF 4 , CO 2 , HF, and H 2 S and resulting in the insulation performance degradation of SF 6 [12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

“…However, when partial discharge (PD) occurs inside the equipment, this phenomenon can decompose SF 6 and generate a series of low-fluorine sulfides (such as SF 5 , SF 4 , SF 3 , and SF 2 ). These low-fluorine sulfides then react with the trace moisture and oxygen that inevitably exist in the equipment, thus generating some stable decomposition products, such as SO 2 F 2 , SOF 2 , SO 2 , CF 4 , CO 2 , HF, and H 2 S and resulting in the insulation performance degradation of SF 6 [12][13][14][15][16][17]. Using SF 6 decomposed component analysis (DCA) effectively avoid the complex electromagnetic interference in the substation; this method has recently become a popular topic for researchers around the world [18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Using SF6 Decomposed Component Analysis for the Diagnosis of Partial Discharge Severity Initiated by Free Metal Particle Defect

Tang

Yang

et al. 2017

Energies

View full text Add to dashboard Cite

Abstract:The decomposition characteristics of a SF 6 gas-insulated medium were used to diagnose the partial discharge (PD) severity in DC gas-insulated equipment (DC-GIE). First, the PD characteristics of the whole process were studied from the initial PD to the breakdown initiated by a free metal particle defect. The average discharge magnitude in a second was used to characterize the PD severity and the PD was divided into three levels: mild PD, medium PD, and dangerous PD. Second, two kinds of voltage in each of the above PD levels were selected for the decomposition experiments of SF 6 . Results show that the negative DC-PD in these six experiments decomposes the SF 6 gas and generates five stable decomposed components, namely, CF 4 , CO 2 , SO 2 F 2 , SOF 2 , and SO 2 . The concentrations and concentration ratios of the SF 6 decomposed components can be associated with the PD severity. A minimum-redundancy-maximum-relevance (mRMR)-based feature selection algorithm was used to sort the concentrations and concentration ratios of the SF 6 decomposed components. Back propagation neural network (BPNN) and support vector machine (SVM) algorithms were used to diagnose the PD severity. The use of C(CO 2 )/CT 1 , C(CF 4 )/C(SO 2 ), C(CO 2 )/C(SOF 2 ), and C(CF 4 )/C(CO 2 ) shows good performance in diagnosing PD severity. This finding serves as a foundation in using the SF 6 decomposed component analysis (DCA) method to diagnose the insulation faults in DC-GIE and assess its insulation status.

show abstract

“…The calculation speed of the analytic method is applicable for the preliminary calculation of temperature rise with a low calculation accuracy. [5][6][7][8][9] does the numerical calculation coupling by vortex, fluid and thermal field by means of finite element method. The numerical method has the problems of data transfer between different cells and heavy workload.…”

Section: Introductionmentioning

confidence: 99%

Thermal Circuit Model of Gas-insulated Transmission Line Based on the Finite Element Method

Song¹,

Jin²,

Zhu³

et al. 2017

dtetr

View full text Add to dashboard Cite

Abstract. Based on the finite element method and thermoelectric analogy theory, the steady-state equivalent thermal circuit model of Gas-insulated transmission line(GIL) is established to calculate the temperature of its tank and conductor, and the transient model is established as well. The losses of tank and conductor are solved by analyzing the electromagnetic field of GIL using the finite element method. Steady-state equivalent thermal circuit model is framed for solving temperature, based on the heat transfer characteristics of GIL. Introducing thermal capacity, transient thermal characteristics of its tank and conductor are solved by simplified transient thermal circuit model. Compared with experimental data and the finite element simulation data, the accuracy of this thermal model of GIL is verified and a theoretical basis is also provide for temperature prediction of GIL.

show abstract

Solution of coupled electromagnetic and thermal problems in gas-insulated transmission lines

Cited by 46 publications

References 7 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

Using SF6 Decomposed Component Analysis for the Diagnosis of Partial Discharge Severity Initiated by Free Metal Particle Defect

Thermal Circuit Model of Gas-insulated Transmission Line Based on the Finite Element Method

Contact Info

Product

Resources

About