飞机交流电源特性参数测量研究

Research on Measurement of AC Electrical Power System Characteristics[JZ)][HS)]

摘要:

飞机机载电源系统供电品质直接关系到飞机用电设备可靠工作和飞行安全,为此,2006年国际标准组织推出了新的机载电源标准ISO1540-2006;本文根据该标准要求,提出了一种机载电源的稳态和瞬态特性的测试的实用方法;建立了测量的数学模型；采用虚拟仪器技术,设计硬件测试平台,包括功率因数可调的大功率数字化程控负载和计算机数据采集系统；基于LabVIEW开发了测试软件；为满足暂态特性的测量要求和精度要求,采用了NI高速高精度数据采集卡,实现了较高的测量精度,综合测量误差小于0.5%,并在暂态测量中,考虑了负载接触器吸合时间;该测试系统可以用来检验恒频机载交流电源的特性是否符合国际标准要求,以保证飞行安全。

Abstract:

The characteristics of aircraft power system are direct related to utilization equipment operation and fly safety. In 2006, The International Standard Organization (ISO) issued new standard ISO1540-2006 “Characteristics of aircraft electrical system”. According to the requirements of the standard, this paper puts forward a useful method to measure Steady-state Characteristics and Transient Characteristics of aircraft electrical power system. This paper founds the mathematic measuring modals; the virtual instrument technology has been adopted to design hardware measuring platform, include adjustable power factor and digital programming large loads and computer data acquisition system. Measuring software is designed based on LabVIEW. In order to satisfy measuring transient characteristics and the accuracy of measurement NI high speed and high accurate data acquisition card is used; the relative high measuring accuracy has been reached ,the total error of measurement is lower than 0.5%,in measuring transient characteristics, the response time of load contractor is took into account. This system can be used to check onboard constant frequency electrical power system whether or not meet the requirements of international standards, to ensure flight safety.