偏心条件下高压套管中使用的带状触头电气接触特性分析

IF 1.4 4区 工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC
Qingyu Wang, Xiaoyu Zhou, Wei Yang, Di Hu, Shoufeng Jin, Tao Xie, Peng Liu, Zongren Peng
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引用次数: 0

摘要

接触指电气连接结构是高压套管的关键部件,其安全性和可靠性直接影响套管的运行稳定性。为了研究接触指在偏心条件下的电接触性能,建立了一个三维电、热、力多物理场耦合计算模型。此外,还搭建了一个测试平台来测量接触指的电接触特性。获得了与母头相比,公头轴向偏转和径向偏移时接触指的接触特性。研究结果表明,当公头轴向偏转时,两侧接触指叶片的接触力变化相反。此外,随着公头轴向偏转角度的增大,电连接结构的电阻呈现出上升-缓慢下降-波动的趋势。3° 时电阻最大,电阻增加率为 7.35%。此外,电气连接结构的电阻随公头的径向偏移而变化,呈幂函数关系。当径向偏移量为 1.31 毫米时,会出现接触失败;当径向偏移量为 1.58 毫米时,电阻增加率达到 24.9%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Analysis of electrical contact characteristics of strap contacts used in high voltage bushings under eccentric conditions

Analysis of electrical contact characteristics of strap contacts used in high voltage bushings under eccentric conditions

The contact finger electrical connection structure is a crucial component of high voltage bushings, and its safety and reliability directly impact the operational stability of the bushing. To investigate electrical contact performance of the contact finger under eccentric conditions, a three-dimensional electrical, thermal, and force multi-physics coupling calculation model was established. Additionally, a test platform was constructed to measure electrical contact characteristics of the contact finger. The contact characteristics of the contact finger when the male head was axially deflected and radially offset compared to the female head were obtained. The research findings indicate when the male head deflects axially, the contact force changes of the contact finger blades on both sides are opposite. Moreover, as the axial deflection angle of the male head increases, the resistance of the electrical connection structure shows a rising-slow decreasing-fluctuating trend. The resistance is highest at 3°, with a resistance increase rate of 7.35%. Furthermore, the resistance of the electrical connection structure varies with the radial offset of the male head, following a power function. Contact failure occurs when the radial offset is 1.31 mm, and the resistance increase rate reaches 24.9% at a radial offset of 1.58 mm.

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来源期刊
Iet Science Measurement & Technology
Iet Science Measurement & Technology 工程技术-工程:电子与电气
CiteScore
4.30
自引率
7.10%
发文量
41
审稿时长
7.5 months
期刊介绍: IET Science, Measurement & Technology publishes papers in science, engineering and technology underpinning electronic and electrical engineering, nanotechnology and medical instrumentation.The emphasis of the journal is on theory, simulation methodologies and measurement techniques. The major themes of the journal are: - electromagnetism including electromagnetic theory, computational electromagnetics and EMC - properties and applications of dielectric, magnetic, magneto-optic, piezoelectric materials down to the nanometre scale - measurement and instrumentation including sensors, actuators, medical instrumentation, fundamentals of measurement including measurement standards, uncertainty, dissemination and calibration Applications are welcome for illustrative purposes but the novelty and originality should focus on the proposed new methods.
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