Application of the lumped parameter line model to simulate electromagnetic transients in three-phase transmission lines with vertical symmetry

In this paper is described the implementation of the frequency-dependent line model (FD-Line) in a real-time digital power system simulator. The main goal with such development is to describe a general procedure to incorporate new realistic models of power system components in modern real-time simulators based on the Electromagnetic Transients Program (EMTP). In this procedure are described, firstly, the steps to obtain the time domain solution of the differential equations that models the electromagnetic behavior in multi-phase transmission lines with frequency dependent parameters. After, the algorithmic solution of the FD-Line model is implemented in Simulink environment, through an S-function programmed in C language, for running off-line simulations of electromagnetic transients. This implementation allows the free assembling of the FD Line model with any element of the Power System Blockset library and also, it can be used to build any network topology. The main advantage of having a power network built in Simulink is that can be executed in real-time by means of the commercial eMEGAsim simulator. Finally, several simulation cases are presented to validate the accuracy and the real-time performance of the FD-Line model.

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Quasi-modes frequency dependent three-phase transmission line model analyzing the earth conductivity influence to electromagnetic transient phenomena

2000 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.00CH37077) ◽

10.1109/pesw.2000.847304 ◽

2002 ◽

Author(s):

C.M. Portela ◽

M.C. Tavares ◽

J. Pissolato

Keyword(s):

Transmission Line ◽

Transmission Line Model ◽

Line Model ◽

Frequency Dependent ◽

Transient Phenomena ◽

Electromagnetic Transient ◽

The Earth ◽

Three Phase ◽

Phase Transmission ◽

Earth Conductivity

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Transmission Line Theories for the Analysis of Electromagnetic Transients in Coil Windings

Advances in Computer and Electrical Engineering - Electromagnetic Transients in Transformer and Rotating Machine Windings ◽

10.4018/978-1-4666-1921-0.ch001 ◽

2013 ◽

pp. 1-44

Author(s):

Akihiro Ametani ◽

Teruo Ohno

Keyword(s):

Transmission Line ◽

Propagation Constant ◽

Characteristic Impedance ◽

Electromagnetic Transients ◽

Distributed Parameter ◽

System A ◽

Three Phase ◽

Distributed Parameter Circuit ◽

Transformer Winding ◽

Phase Transmission

The chapter contains the basic theory of a distributed-parameter circuit for a single overhead conductor and for a multi-conductor system, which corresponds to a three-phase transmission line and a transformer winding. Starting from a partial differential equation of a single conductor, solutions of a voltage and a current on the conductor are derived as a function of the distance from the sending end. The characteristics of the voltage and the current are explained, and the propagation constant (attenuation and propagation velocity) and the characteristic impedance are described. For a multi-conductor system, a modal theory is introduced, and it is shown that the multi-conductor system is handled as a combination of independent single conductors. Finally, a modeling method of a coil is explained by applying the theories described in the chapter.

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