| Summary: | 碩士 === 國立臺北科技大學 === 電資碩士在職專班研究所 === 100 === Harmonic current distortion has become a major power quality problem in recent years. This is mainly due to the introduction of nonlinear loads, especially power electronic converters adopted in the power systems. In the meantime, they induce harmonic pollution problems. The equipment might not operate normally due to the effect. In order to reduce the harmonic pollution problems and ensure the quality of the power supply, this research measures a high-tech factory''s power quality including the harmonics, flicker and voltage unbalance ratio measurement.
This thesis in accordance with power harmonic theory to use as harmonic and power meter to measured the load of factory. Use personal computer to record the data of harmonic current and voltage. To test and verify harmonic theory with understand equipment known. We could analyze the harmonic contents and the voltage unbalance by using the mathematical model of the article. We could judge if we improve harmonic and voltage unbalance situation from field data according to the requirement of power system and production specification. When it is necessary to improve, we use 2nd order damping filter as solution for factory equipment. In addition to consider harmonic improvement, the limited space is also a challenge. The 2nd order damping filter could meet both requirements. With regard to voltage unbalance problem, it is necessary to do transposition power cable in the field.
Finally we collected two cases in this thesis. We proved that analysis method that we mentioned in this article is useful through those cases. And we verified whether we solve the problem by using 2nd order damping filter and transposition power cable through the same mathematician’s model.
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