Modeling and Simulation for Insulation Performance Analysis of Composite Transmission Line Tower Under Lightning Overvoltage

doi:10.11930/j.issn.1004-9649.201610010

Abstract

Abstract: The traditional multi-wave impedance model is utilized widely in lightning performance simulation analysis of composite material tower. However, the simulation result of lightning overvoltage is relatively large. In this paper, an improved multi-wave impedance model is proposed with consideration of the influence of capacitance of conductor to ground. The wave impedance is derived partly according to the 110 kV composite material tower. The equivalent capacitance of conductor to ground is calculated by finite element method (FEM), and the calculation results are compared with the traditional model. The results show that the over voltage of tower with consideration of capacitance decreases by 38%, which are close to the actual value, and the lightning withstand performance of composite material tower is optimal under the grounding down mode of shielding wire vertically suspended on the center line between the two circuit lines.

Key words: composite material tower, grounding down mode, multi-wave impedance model, lightning withstand level, ATP-EMTP

CLC Number:

TM866

ZHANG Yujiao, LIU Jiawei, HUANG Xiongfeng, SU Pan, ZHI Li, JIANG Lan. Modeling and Simulation for Insulation Performance Analysis of Composite Transmission Line Tower Under Lightning Overvoltage[J]. Electric Power, 2018, 51(5): 68-74.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.201610010

https://www.electricpower.com.cn/EN/Y2018/V51/I5/68

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