The influence of zero-sequence impedance on power-frequency overvoltage of asymmetric eathing fault is researched though comparing surge impedance of different types of ACSR as ground-return wires .

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Compact line with High Surge Impedance Loading

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A distributed line tower model of multi-circuit transmission line is constructed ; different part of towers are modeled by different surge impedance and different wave velocity .

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According to the property that the surge impedance relay is realized by the ratio of voltage and current travelling waves the relay 's algorithm based on wavelets is present .

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When the surge impedance of the power line suddenly changes the travelling voltage or current wave will produce refraction and reflection .

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Increasing the Transmission Capacity of Overhead Lines & High Surge Impedance Loading Technique

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Through experimental and simulation analysis of surge impedance validity of the proposed theory is verified .

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For future research attentions should be paid to transmitting performance of lightning wave in extra-high transmission tower ; the reasonable model for analyzing lightning performance and mathematic equation for calculating the surge impedance of extra-high transmission tower should be established .

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Survey and Analysis of Surge Impedance and Potential Distribution of 500 kV Double Loop Steel Tower

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Tower surge impedance is an important parameter for lightning protection design but its value is not well determined .

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The calculation model of conductor and tower surge impedance under overvoltage caused by lightning striking as well as calculation formula of tower surge grounding resistance are introduced .

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The determination of the optimum impedance coefficient of the surge tank in a hydropower station a study of hybrid optimum impedance inversion method

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This paper introduces the effect of the impedance factor to the highest and the lowest amplitude value of the impedance surge chamber and analyzes the reasonable selection for the impedance factor of the surge chamber .

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Study of Tower Surge Impedance

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Using distributing parameter analyzing the surge impedance of tower the simulation value of tower surge impedance is close to the test value and the relative error between is in ten percent .

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