变频系统中交流电弧故障特性及检测技术
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作者单位:

南京航空航天大学自动化学院南京211106

作者简介:

通讯作者:

王莉,女,教授,博士生导师,E-mail:liwang@nuaa.edu.cn。

中图分类号:

V37

基金项目:

国家自然科学基金 51877102国家自然科学基金(51877102)资助项目。


AC Arc Fault Characteristics and Detection Technique in Variable Frequency System
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Affiliation:

College of Automation Engineering, Nanjing University of Aeronautics & Astronautics, Nanjing, 211106, China

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    摘要:

    目前,交流电弧故障特性分析基本上都是基于恒频系统,先进飞机交流电源系统向变频电源方向发展,频率变化范围为360~800 Hz。交流电弧故障的特征量如电流变化率、平肩段比例、谐波分量等都会随着频率而变化,因此恒频系统的电弧故障检测算法无法完全适用于变频系统中。基于此,本文搭建了交流电弧故障实验平台,在115 V/360~800 Hz条件下模拟了串行和并行电弧故障。在此基础上,分析了不同频率条件下故障电流的变化规律,从时域和频域角度研究了交流电弧故障电流的特征,提取了电流有效值的标准差、奇次谐波功率和、偶次谐波功率和作为变频系统电弧故障检测的特征量,最后设计并验证了交流电弧故障检测算法的有效性和可行性。

    Abstract:

    In recent research, AC arc fault characteristic analysis is basically based on constant frequency system. The AC power supply of aircraft is developing towards the direction of variable frequency power supply, and the frequency range is 360—800 Hz. The characteristics extracted from constant frequency system, such as current change rate, the ratio of flat shoulder and harmonic component will change with frequency, which cannot be applied in variable frequency system. Therefore, this paper designs the AC arc fault experiment platform, and the serial and parallel arc faults are simulated under the condition of 115 V/360—800 Hz. Based on this, the change rule of arc current under different frequencies is analyzed. The characteristics of AC arc fault are studied in time domain and frequency domain respectively, then the standard deviation, odd harmonic and even harmonic are extracted as the characteristics of arc fault detection in the variable frequency system. Finally the effectiveness and feasibility of AC arc fault detection algorithm is designed and verified through experiment.

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引用本文

曾珂,邢丽冬,高杨,王莉.变频系统中交流电弧故障特性及检测技术[J].南京航空航天大学学报,2020,52(2):215-223

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  • 收稿日期:2018-05-10
  • 最后修改日期:2019-05-19
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  • 在线发布日期: 2020-05-19
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