| Summary: | 碩士 === 國立臺灣科技大學 === 電機工程系 === 87 === Abstract
This thesis studies designing a power quality measurement system, which consists of a personal computer, some voltage and current sensing devices, and analog/digital interfacing circuits. The whole system is implemented by using power electronics principle. This is a low cost measurement system, as a result, it can be widely used in industry and laboratory. A software package, based on the power electronic application and computer algorithm has been developed. By suitably combining the software and hardware circuits, the proposed analyzer can measure and calculate voltage, current, real power, reactive power, power factor, displacement factor, harmonics, and frequency spectra. The waveform shapping algorithm and the fast Fourier transformation (FFT) have been developed to compute harmonics as well as power spectra. The display of the data and figures is also carefully designed. The proposed measurement system is easily used, as a result, it is easily accepted by the users﹒This thesis has developed a low cost power analyzer by using a personal computer which has the strong computation ability. This thesis, therefore, provides a useful instrument for measurement.
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