组合波试验用压敏电阻耦合方法及推荐参数

IF 1.4 4区 工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC
Mi Zhou, Weihan Zhao, Dongdong Wang, Haoshen Fan, Li Cai, Jianguo Wang, Yadong Fan
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引用次数: 0

摘要

国际电信联盟建议在浪涌防护器的组合波测试波形中使用压敏电阻耦合,尽管对组合波测试的压敏电阻耦合方法和推荐参数还不太了解。本文详细研究了变阻器耦合引入的波形影响特性。本文在OrCAD/PSpice环境中采用了最大工作电压在130~750V范围内的低压变阻器,以分析变阻器耦合对组合波发生器(CWG)在0~20kV测试水平下输出特性的影响。仿真结果表明,由于变阻器的耦合,开路电压会出现反向振荡现象。同样由于变阻器耦合,与CWG直接产生的变阻器相比,OCV和短路电流的峰值、前沿时间和尾部时间都将减少,而虚拟阻抗将增加。此外,测试水平越低,或者变阻器的最大工作电压越高,这种影响就越严重。在这里也进行了实验,我们的模拟结果与实验结果吻合得很好。与传统的电容器耦合相比,供电网络的电压范围和变阻器耦合的组合波测试水平似乎必须在很大程度上受到限制。SPD组合波测试用变阻器耦合只能在没有严格波形限制的特殊情况和特殊测试级别下使用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Varistor coupling method and recommendation parameters for combination wave test

Varistor coupling method and recommendation parameters for combination wave test

Varistor coupling is recommended by International Telecommunication Union in combination wave test waveforms of surge protective devices (SPD), although the varistor coupling method and recommendation parameters for the combination wave test are not well understood. The waveform influencing characteristics introduced by varistor coupling are studied in detail in this paper. Low-voltage varistors, with maximum operating voltages ranging from 130 to 750 V, are adopted here in the OrCAD/PSpice environment to analyze the influence of varistor coupling on the output characteristic of the combination wave generator (CWG) in test levels of 0 to 20 kV. Simulation results show that, owing to varistor coupling, the reverse oscillation phenomena will arise in the open-circuit voltages (OCVs). Also owing to varistor coupling, compared with those generated directly by a CWG, the peak value, the front time, and the tail time for both OCV and short-circuit current will decrease, whereas the virtual impedance will increase. Moreover, the lower the test level, or the higher the maximum operating voltage of the varistor, the more serious this effect. Experiments have also been conducted here, and our simulation results are found to match the experimental ones well. It seems that, compared with the conventional capacitor coupling, the range of the voltage of power supply networks and the levels of combination wave test by varistor coupling have to be limited to a great extent. Varistor coupling for combination wave test of SPD should be only used in special cases and special test levels where there are no strict waveform limitations.

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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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