The high-voltage substation configuration influence on the estimated lightning performance

Stojković, Zlatan; Savic, Milan

doi:10.1007/bf01232800

Cited by 5 publications

(3 citation statements)

References 4 publications

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“…5. Instead of discharge point continuous variation along the span, only a few (usually five) equidistant points of discharges along the span are analyzed [22].…”

Section: Incorporation Of the Equivalentmentioning

confidence: 99%

“…The lightning stroke was assumed to hit the middle of the line span. The impulse current amplitude and steepness amount to 121 kA and 43.2 kA /!ls according to the joint log-normal current magnitudes and rates of rise of the frequency distribution [22]. The probabilities of exceeding the selected values are assumed to be 2 %.…”

Section: Calculation and Experimental Verificationmentioning

confidence: 99%

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Influence of transmission line tower grounding impedance to the line flashover rate

Stojković¹,

Savic²

1999

Int Trans Elec Energy Syst

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The paper presents a mathematical model for analysing impulse characteristics of complex grounding grids in uniform and two‐layer soil. The model is based on the grounding grid equivalent circuit with lumped parameters, described by a system of differential equations. The effect of the mutual couplings of the grounding grid elements can be comprised by the so‐formed model. The established model has been successfully checked experimentally for the square grounding grid. A grapho‐analytical approach to the evaluation of the transmission line tower impulse grounding impedance model is described. The proposed model is convenient for practical application. It is incorporated into the present lightning overvoltage computation program. The methodology of the line flashover rate estimation is illustrated at the example of 400‐kV overhead lines.

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“…5. Instead of discharge point continuous variation along the span, only a few (usually five) equidistant points of discharges along the span are analyzed [22].…”

Section: Incorporation Of the Equivalentmentioning

confidence: 99%

Section: Calculation and Experimental Verificationmentioning

confidence: 99%

Influence of transmission line tower grounding impedance to the line flashover rate

Stojković¹,

Savic²

1999

Int Trans Elec Energy Syst

Self Cite

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“…The denoted currents I max and I CR are important for failure risk evaluation using the method of limiting parameters. 16,17 This discussion has focussed on shielding the outside phase of a line. While shielding failures to the centre phase may occur in extremely rare cases, they are predicted to be and are essentially zero.…”

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confidence: 99%

AutoCAD-Based Concept for Estimating Lightning Protection Zone of Transmission Lines and Structures

Stojković

Stankić²

2006

International Journal of Electrical Engineering & Education

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The paper presents lightning protection zone visualisation for transmission lines and structures. Different methods used for protection zone evaluation are discussed. A software tool realised by applying AutoCAD and programming languages AutoLISP and Visual Basic is demonstrated. Some of the software tool possibilities are illustrated for concrete calculation examples.The use of computer simulation tools to improve efficiency in the learning process has been proposed since the 1980s. 1 As a result of recent technological trends in engineering education, the importance of applying software tools in power system studies has been realised. Computer simulation tools are widely used for transient event simulations, power flow studies, stability analysis and operational planning.Working as a design engineer of hydropower plants, the first author has identified the role of advanced computer-aided design (CAD) tools in the effective resolution of many practical problems. An important task in the design of lightning protection for transmission lines and structures is protection zone evaluation and its visualisation. This paper presents a review of the different methods used for protection zone evaluation. [2][3][4][5] The advantages and disadvantages of these methods are discussed. Formed by the application of powerful tool AutoCAD and programming languages AutoLISP and Visual Basic 6,7 the purpose of this user-oriented tool is to construct the lightning protection zone in a way suitable for the designer's practice. The algorithms contained in the tool are shown. The procedure of protection zone visualisation based on the use of different methods for a 220 kV transmission line tower and concrete structures is performed. Transmission line shielding zone constructionMathematical formulation of the physical problem Shielding of transmission lines is based on the application of corresponding ground wires. The purpose of overhead ground wires is to act as collector of the flashes and to prevent flashes from terminating on the phase conductors and causing a flashover.

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Computer-Aided Modeling and Simulation

Stojković

2012

Computer- Aided Design in Power Engineering

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The high-voltage substation configuration influence on the estimated lightning performance

Cited by 5 publications

References 4 publications

Influence of transmission line tower grounding impedance to the line flashover rate

Influence of transmission line tower grounding impedance to the line flashover rate

AutoCAD-Based Concept for Estimating Lightning Protection Zone of Transmission Lines and Structures

Computer-Aided Modeling and Simulation

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