Digital filter realizations of a phase domain transmission line model for electromagnetic transient analysis

2014 ◽  
Author(s):  
Martin G. Vega ◽  
J. L. Naredo ◽  
O. Ramos-Leanos
Keyword(s):  
Transmission Line ◽  
Digital Filter ◽  
Transient Analysis ◽  
Transmission Line Model ◽  
Line Model ◽  
Electromagnetic Transient ◽  
Phase Domain ◽  
Electromagnetic Transient Analysis

A TWO LEVEL TRANSMISSION LINE MODEL FOR TRANSIENT ANALYSIS

1999 ◽  
Vol 09 (01n02) ◽  
pp. 113-124
Author(s):  
METHEE HWANGKHUNNATHAM ◽  
EKACHAI LEELARASMEE
Keyword(s):  
Transmission Line ◽  
Transient Analysis ◽  
Circuit Analysis ◽  
Simultaneous Solution ◽  
Transmission Line Model ◽  
Line Model ◽  
Segmented Model ◽  
Efficient Approach

An efficient approach based on conventional techniques for transient analysis of transmission line circuit initially modelled as large number (N) of segments of lumped components is presented. This technique avoids the simultaneous solution of a large number of variables by computing an equivalent macromodel of each transmission line and splitting the analysis into two levels. The first level deals with a normal circuit analysis in which each transmission line is replaced by a simple lumped equivalent two port companion macromodel having only three resistors and two current sources. However, the initial N-segmented model of transmission line must be separately analyzed at the second level in order to update the transmission line companion macromodel at each timepoint. This latter analysis of the transmission line can be done efficiently using a set of recursive formulae whose complexities depend linearly on N. A simulation result of this technique is presented and compared with SPICE program.

scholarly journals Analysis of the transients on the multi-circuit overhead transmission line

2017 ◽  
Vol 68 (6) ◽  
pp. 476-481
Author(s):  
Tomáš Nazarčík ◽  
Zdeňka Benešová
Keyword(s):  
Differential Equations ◽  
Transmission Line ◽  
Ordinary Differential Equations ◽  
Time Distribution ◽  
Transient Analysis ◽  
Transmission Line Model ◽  
Line Model ◽  
Overhead Transmission Line ◽  
Parallel Circuits

Abstract In this paper a method for a transient analysis on the multi-circuit overhead transmission line with different voltage levels (EHV and HV) is presented. The influence of inductive and capacitive couplings between the parallel circuits placed on the same tower is studied. The transmission line model consists of mutual coupled two-port cascades which can be described by a system of ordinary differential equations (ODE). This system has been solved numerically in MATLAB, the obtained results provide the time distribution of currents and voltages in all conductors along the transmission line. The presented algorithm allows solving various types of transients which can occur during switching off- and on-operations, shortcircuits etc.

scholarly journals A Non-Uniform Transmission Line Model of the ±1100 kV UHV Tower

Energies ◽  
2019 ◽  
Vol 12 (3) ◽  
pp. 445 ◽  
Author(s):  
Xianshan Guo ◽  
Ying Fu ◽  
Jingqiu Yu ◽  
Zheng Xu
Keyword(s):  
Transmission Line ◽  
Transmission Lines ◽  
Transmission Line Model ◽  
Voltage Level ◽  
Line Model ◽  
Lightning Strikes ◽  
Impedance Model ◽  
Electromagnetic Transient ◽  
Structure Changes ◽  
The Impact

The modeling of the Ultra-High Voltage (UHV) tower plays an important role in lightning protection analysis of transmission lines because the model used will directly affect the reliability of the results. Moreover, the higher the voltage level is, the more prominent the impact becomes. This paper first analyzes the inapplicability of the Hara multi-segment multi-surge impedance model for the ±1100 kV UHV towers, and then builds a non-uniform transmission line model of the tower. Secondly, the multi-segment multi-surge impedance model is used to study the influence of the tower’s spatial structure changes on its electromagnetic transient characteristics. It is concluded that the more accurately the nominal height of the tower is modeled, the more accurately its electromagnetic transient response is reflected. Finally, the lightning electromagnetic transient responses of the tower with the non-uniform transmission line model and with the multi-segment multi-surge impedance model are compared and analyzed, which shows that the non-uniform transmission line model is more in line with the actual situation under the lightning strikes.

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