接地电阻模型对冲击电流回路输性影响的仿真

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Abstract Four kinds of tower grounding simulation model (constant resistance model, nonlinear resistance model, capacitance impedance model, combination model) were set up to study the influence law of these models on 8/20μs impulse current waveform parameters. The following results are obtained. Firstly, when the charging voltage is larger than a certain value, the output impulse current waveform parameters of the nonlinear resistance model and the combination model are affected by the charging voltage. Secondly, critical breakdown electric field intensity E_c and soil resistivity ρ mainly affect the nonlinear resistor part of the grounding model. Larger soil resistivity ρ and smaller critical breakdown electric field intensity E_c can improve the amplitude of the output waveform and make the ratio of wave tail and wave head closer to 2.5. Thirdly, the larger the capacitor part of the grounding is, the greater the output waveform amplitude would be, but the further the ratio of wave tail and wave head would deviate from 2.5. Fourthly, the ratio of R_i and R₀ has little impact on the output waveform parameters of the capacitance impedance model and combination model.

Key words： tower grounding model impulse current circuit output characteristic ATP-EMTP

Received: 20 April 2015 Published: 23 March 2015

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	Articles by authors
	Huang Bo
	Jiang Anfeng
	Fu Zhengcai

Cite this article:

Huang Bo,Jiang Anfeng,Fu Zhengcai. Simulation of Effect of Grounding Resistance Model on Output Characteristics of Impulse Current Circuit[J]. Electrical Engineering, 2015, 16(03): 1-5.

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http://dqjs.cesmedia.cn/EN/Y2015/V16/I03/1

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