次大气压力下的局部放电。航空航天应用的绝缘评定程序

D. Kasten, S. Sebo, X. Liu
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引用次数: 5

摘要

低压环境下的局部放电(PD)测试是评估高空飞行飞机和航天器电气绝缘完整性的一种诊断方法。为了确保航空航天设备的动力系统部件在工作条件下的可靠性能和正常功能,这种评估是必不可少的。本文概述了一项实验PD研究计划,涵盖了各种电极系统,使用空气,氩气和氦气,压力范围为101.3 kPa (760 Torr)至0.27 kPa (2 Torr), 60 Hz交流通电。这个压力范围对应于从海平面到大约60公里的飞行高度范围。在低压(高海拔)下,PD脉冲特性与在地面压力下通常遇到的值不同。在大多数情况下,这些次大气特性意味着需要改变常用的测试程序。本文建议在遵守IEC 60270标准基本原则的情况下,对通用测试程序进行修改和/或补充。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Partial discharges at sub-atmospheric pressures — insulation evaluation procedures for aerospace applications
Partial discharge (PD) testing in a low pressure environment is a diagnostic method for evaluating the integrity of electrical insulation in aircraft and spacecraft capable of operating at high altitudes. This evaluation is essential in order to ensure the reliable performance and proper functioning of power system components of aerospace equipment under operating conditions. The paper outlines an experimental PD investigation program covering various electrode systems, using air, argon and helium, at pressures in the range of 101.3 kPa (760 Torr) to 0.27 kPa (2 Torr) with 60 Hz ac energization. This pressure range corresponds to a range of flight altitudes from sea level to about 60 km. At low pressures (high altitudes) PD pulse characteristics are different compared to the values typically encountered at terrestrial pressures. In most instances, these sub-atmospheric characteristics imply a need for changes of commonly used test procedures. The paper suggests modifications and/or additions to common test procedures while observing the basic principles of the IEC 60270 standard.
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