Simulation test study on fatigue characteristics of circuit breaker insulation pull rod

IF 1.4 4区工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

Iet Science Measurement & Technology Pub Date : 2022-08-12 DOI:10.1049/smt2.12120

Liu Peng, Wu Qingsong, Wang Haoran, Cui Boyuan, Wu Zhehua, Chen Yun, Yang Yong, Peng Zongren

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引用次数: 1

Abstract

The insulation pull rod is the main transmission mechanism of the circuit breaker. In addition to strong electrical performance, it should also have strong mechanical properties. Studying the dynamic characteristics and response insulation pull rods during opening and closing operation and exploring the changes in mechanical characteristics of insulation pull rods during multiple openings and closings are of great significance. In this paper, a 252kV GIS circuit breaker simulator is used to carry out an opening and closing impact fatigue test on an insulation pull rod. The strain signals of the insulation pull rod during the opening and closing stages are obtained. The strain distribution of insulation pulls rod and the influence of operation times on strain are analyzed. The results show that the force on the pull rod is uneven during operation. The force on the mechanism side and contact side is small, and the force on the rod body is large. Also, the pull rod is unstable and bent under pressure force. The impact response frequency is mainly distributed between 0∼1500Hz. With the increase in operation times, the low-frequency component of frequency response basically remains unchanged, while the high-frequency component decreases. After 10000 times opening and closing operations, there was no obvious mechanical loss on the pull rod, but the mechanical properties decreased. The research results can provide reference and basis for the formulation of the performance test method, and specifications of insulating rod materials.

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断路器绝缘拉杆疲劳特性模拟试验研究

绝缘拉杆是断路器的主要传动机构。除了具有较强的电气性能外，还应具有较强的机械性能。研究绝缘拉杆在开闭过程中的动态特性和响应，探索绝缘拉杆在多次开闭过程中力学特性的变化具有重要意义。本文利用252kV GIS断路器模拟器对绝缘拉杆进行了开闭冲击疲劳试验。得到了绝缘拉杆在开启和关闭阶段的应变信号。分析了绝缘拉杆的应变分布及操作次数对应变的影响。结果表明，拉杆在运行过程中受力不均匀。作用在机构侧和接触侧的力小，作用在杆体上的力大。此外，拉杆不稳定，在压力下弯曲。冲击响应频率主要分布在0 ~ 1500Hz之间。随着运行次数的增加，频率响应的低频分量基本保持不变，高频分量减小。经过10000次开合操作后，拉杆没有明显的力学损失，但力学性能下降。研究结果可为绝缘棒材料性能试验方法和规范的制定提供参考和依据。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

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

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.