摘要
介绍了一种新近研制的电力系统三相同时测量谐波分析仪,它是由MCS-98单片计算机构成的智能式数字谐波测量仪器。所设计的多通道采样保持和时分模数转换电路,在最小造价下实现了三相电压和电流的同步数据采集,由此给出了谐波幅值、初相位、含有率和总畸变度以及功率和阻抗等.其最显著的特点是向用户提供谐波统计分析估计值和最大筛选值以及日变化曲线.
This paper introduces a type of three-phase harmonic analyzer recently developed for power systems in which the waveform signals are sampled simul taneously. This digital harmonic analyzer is based on a MCS-8098 single chip microcomputer. Due to the incorporation of a multi—channel sampling—hold circuit and a time—share converter circuitonly two 12-bit high speed analog digital converters are used in this instrument for converting the six signals of voltage and current. From these measurements, harmonic amplitudes, angles, power, impedances and fundamental frequency in three—phase power systems can be calculated. Due to the simultaneous measurement of the three—phase waveforms, it is possible to analyze the harmonic power flow and the harmonic symmetric components. It can give an evaluation of the harmonic statistical analysis and the maximum harmonic amplitude obtained.
关键词
电力系统
谐波
测量
微机
power systems
harmonics
analysis
measunnent
