A digital instrument for measurement of voltage flicker

S. Nuccio
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引用次数: 30

Abstract

The voltage flicker is one of the aspects of power quality related to slow and repetitive fluctuations (0,5-30 Hz) of the rms voltage of the electricity supply network. To evaluate these fluctuations the UIE&IEC give functional and design specifications for a flickermeter. The proposed measurement techniques are basically designed for analog implementation. In this paper, a digital flickermeter is presented based on the forward and inverse F.F.T. and on the filtering in the frequency domain for the implementation of the functional blocks of simulation of lamp-eye-brain response. The instrument, implemented with a NI acquisition board inserted on a PC and with a software developed with the LabView tools, samples the voltage and furnishes the instantaneous flicker level, continuously sampled at 2 kHz. Results of simulated and actual data are reported to validate the performances of the realized flickermeter compliant the specifications of the IEC 868 recommendation.
一种测量电压闪变的数字仪器
电压闪变是电能质量的一个方面,与供电网络的均方根电压的缓慢和重复波动(0.5 -30 Hz)有关。为了评估这些波动,UIE&IEC给出了闪变计的功能和设计规范。所提出的测量技术基本上是为模拟实现而设计的。本文提出了一种基于正、逆f.f.t和频域滤波的数字闪变仪,实现了模拟灯眼脑反应的功能模块。该仪器由插在PC上的NI采集板和用LabView工具开发的软件实现,对电压进行采样并提供瞬时闪烁电平,连续采样频率为2khz。仿真结果和实际数据验证了所实现的闪变仪的性能符合iec868推荐规范。
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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