Lightning Incidence on Transmission Overhead Lines

Author(s):  
Pavel Janys ◽  
Radek Prochazka
2013 ◽  
Vol 316-317 ◽  
pp. 161-166
Author(s):  
Mei Yun Zhao ◽  
Zheng Lin Liu ◽  
Xin Ze Zhao ◽  
Rui Feng Wang

Aeolian vibration often occurs in the high-voltage transmission overhead lines, and the amplitude of conductors has close relationship with conductors fretting wear. It is very difficult to measure actual amplitude of working conductor, so obtaining the amplitude of the conductor by the means of simulation is of practical significant to research quantitatively the relationship of the amplitude and the fretting wear. In this paper an imitation test-bed was built. The maximum amplitudes in the different location of a conductor in a test condition were obtained by Simulink software simulating, and the results were compared with the maximum amplitudes obtained by experimental test. The result of this comparison showed that between of them were of good similarity, and the locations of vibration nodes and maximum amplitudes were basically same. It was proved to be feasible that the aeolian vibration amplitude of the overhead conductor in kinds of conditions could be obtained by Simulink software simulating.


2019 ◽  
Vol 8 (2S8) ◽  
pp. 1876-1882

Now daily's electrical power necessity has expanded exponentially while the development and rebuilding of the electrical power framework for age and transmission in the power segment has been basically restricted because of present assets and natural conditions. Accordingly, roughly of the halls of power transmission overhead lines are intensely stacked and clogged. Additionally the serious issue of power framework voltage dependability turns into a power move constraining and capacity factor. A Modern power electronics innovation FATCS based gadget Static Synchronous Series Compensator (SSSC) is a VSC based series FACTS gadget. Bound together power flow controller (UPFC) is to control power flow, voltage magnitude, and phase point. In this examination paper proposed to keep up the voltage magnitude just as power flow of broken lines. The result of change of the power framework parameters, for example, voltage, phase point, dynamic power, responsive power, and in general power factor with and without SSSC and UPFC have additionally been consolidated. Assessment of power framework security is important in the public arena to create approaches to keep up framework activity when at least one segments come up short. A power framework is "secure" when it can resist the loss of at least one fixings and still continue working without serious issues. The Contingency occasion examination strategy is taken to recognize electrical hub power flow in the flawed transmission lines. The Performance of power framework is checked on IEEE 14-Bus System.


Author(s):  
Svetlana Guseva ◽  
Lubov Petrichenko

The choice of optimum cross section for overhead line by economic intervals' methodIn this paper an approach to choosing the optimum cross section for overhead line in conditions of incomplete and uncertain information is considered. The two methods of such choice are presented: method of economic current density and economic intervals' method. The correction of the economic intervals method is offered under market conditions of costs. As example 20 kV and 110 kV overhead lines with aluminum, copper and ferroaluminum wires are selected. Universal nomograms with different standard cross section are calculated and constructed. The graphics using Mathcad software are offered.


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