Development of the Model for Simulation of Transient Processes in Cables and Power Lines

Jakšić, U.; Marković, Nenad; Živanić, Jeroslav; Milenković, N

doi:10.9734/cjast/2017/39169

Cited by 3 publications

(2 citation statements)

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“…If the line element has distributed parameters, it is represented by a quadripoles model and more easily considers the wave character of energy transfer through that part [17,18]. Voltages, currents and power flow at the inlet or outlet of line are determined from the equivalent scheme.…”

Section: Analysis Of the Network Element Model As A Quadripolesmentioning

confidence: 99%

Idling and Short-circuit Analysis of a Three-phase Power Transformer Represented by a Scheme with Distributed Parameters and П line Scheme in the Electrical Network

Marković¹,

Bjelić²,

Marković³

et al. 2023

CJAST

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Aims: The paper presents a simulation of a theoretical model of electromagnetic extreme regimes, idling and short circuit, in a three-phase power transformer. The main goal of this paper is to show in a quality way that the computer simulation of the obtained theoretical model using the software package MATLAB Simulink confirms the possibility of analyzing the extreme modes of transformers. Methodology: To solve the problem of the presence of a transformer as an element of power in the power system, the following are used: Analytical methods in which the transformer is presented as a network element - usually as a quadripole, numerical programming that includes dynamic programming and independent variables, and combined programming with integer values. In the process simulation on elements with given parameters and frequency, a comparison of the substitution schemes used so far in the theory of electric circuits is performed. The accuracy of these theoretical models can be confirmed by voltage and current diagrams in the adapted software package MATLAB Simulink. Conclusion: The presented theoretical model and the applied algorithm in the simulation are universal and can be used for different states in which a three-phase power transformer can be found. Problems that occur in the analysis of transient processes in electrical networks where the element is a transformer can be minimized using simulation methods. Changing any parameter in the electrical circuit requires a new calculation of the condition of the circuit from the very beginning due to the new initial conditions. Analytical methods combined with the simulation method were used in the research of extreme regimes, such as idling and short circuit. The verified simulation method realized using the adapted MATLAB Simulink program had a threefold purpose: to serve the calculation and simulation of quantities that can be obtained by testing or measuring, to establish the original algorithm and to verify the proposed method. Also, this type of simulation can replace the idle and short circuit test.

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Section: Analysis Of the Network Element Model As A Quadripolesmentioning

confidence: 99%

Idling and Short-circuit Analysis of a Three-phase Power Transformer Represented by a Scheme with Distributed Parameters and П line Scheme in the Electrical Network

Marković¹,

Bjelić²,

Marković³

et al. 2023

CJAST

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show abstract

“…In the superposition method, the process of current interruption in a switch with an arc is equivalent to the inclusion in the circuit of a conditional source with a current equal in intensity and opposite in direction to the tripping current (the resulting current is equal to zero) [17,18]. Combined with the operator this method allows the setting voltage to be determined with:…”

Section:  mentioning

confidence: 99%

New Theoretical Model of Electric Arc in Circuit Breaker and the Role of Parallel Resistance – The Shunt

Bjelić¹,

Marković²,

Jakšić³

et al. 2021

CJAST

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Aims: The paper presents a new theoretical model of an electric arc in a circuit breaker with reference to the role of shunt resistance parallel to the electric arc in a circuit breaker switch. One of the goals of the paper is to show the efficiency of using the software package MATLAB Simulink in which the previously derived system of equations is easily implemented in the blocks of the mentioned software package. Methodology: The discharges in the electric arc determine the potential between the metal contacts of the switch and the structure and shape of the electric arc make it difficult to solve the transient process. The main step in solving the problem is the formation of a theoretical model of the electric circuit from which the current and voltage can be determined, which depend on the parameters of the electric field in the arc. The use of shunts in oil and air switches, due to a number of shortcomings, was not possible, but the disadvantages are overcome if thyristors are used to interrupt the current. The equations and the algorithm for solving the problem are obtained from the parameters of the electric field potential that shape the electric arc and its path. The accuracy of the theoretical model is confirmed by voltage and current diagrams in the adapted MATLAB Simulink software package. Conclusion: The presented theoretical model and algorithm are universal and can be used for different states in which an electric line can be found. Problems that occur in the analysis of transient processes in an electric circuit where an electric arc occurs can be minimized using different types of simulations. Changing any parameter in the electrical circuit requires a new calculation of the state of the circuit from the very beginning due to the new initial conditions. Analytical methods combined with the simulation method were used in the research of overvoltages, asymmetries and harmonics during the appearance of an electric arc. The MATLAB simulation program had a threefold purpose: to serve the calculation and simulation of quantities that can be obtained by testing or measurement, to establish the original algorithm and to verify the proposed method. Also, this type of simulation can replace the type tests of the electric arc on the switch.

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Transient Processes in the Electric Circuit Where Inverter Arbitrarily Supplies the One-Phase R(L) Loading

Bjelić¹,

Marković²,

Jakšić³

et al. 2018

2018 26th Telecommunications Forum (TELFOR)

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Development of the Model for Simulation of Transient Processes in Cables and Power Lines

Cited by 3 publications

References 0 publications

Idling and Short-circuit Analysis of a Three-phase Power Transformer Represented by a Scheme with Distributed Parameters and П line Scheme in the Electrical Network

Idling and Short-circuit Analysis of a Three-phase Power Transformer Represented by a Scheme with Distributed Parameters and П line Scheme in the Electrical Network

New Theoretical Model of Electric Arc in Circuit Breaker and the Role of Parallel Resistance – The Shunt

Transient Processes in the Electric Circuit Where Inverter Arbitrarily Supplies the One-Phase R(L) Loading

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