| Summary: | 碩士 === 國立臺灣科技大學 === 電機工程系 === 89 === The primary step in power quality regulation and improvement is system monitoring. Hence, it is important to establish a complete and perfect numerical analysis method . The cause of power quality pollution is extensive, such as harmonic distortions generated by non-linear load, voltage flickers resulting from the fluctuation loads, and three phase voltage unbalance, voltage sag, etc. Based on the digital signal processing technology, this thesis discusses the calculation algorithm of power quality quantities, which includes using Park’s transform to calculate basic power quantities that is active power, reactive power and complex power; estimating harmonics by average cycle method and analyzing the diversity of different demodulation methods. Furthermore, we use wavelet transform method to compress instantaneous waveform data. In order to exalt its practical application, this thesis uses not only test signals, but also field data for cross-validation. Finally, the combination of each calculation methods is used to design and develop a multi-objective Window-oriented analysis software.
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