| Summary: | 碩士 === 國立雲林科技大學 === 電機工程系碩士班 === 91 === In recent years, power electronic products are widely used in the industry. Most of these converters are non-linear loads，which bring power system unexpected current harmonics, voltage flicker and voltage noise, etc.
In this thesis, three categories of neutral point clamped power converters are constructed for a single-phase on-line uninterruptible power supply system. They are includes neutral point AC switch clamped converter, neutral point diode clamped converter and capacitance clamped converter. Finally, simulations based on Matlab/Simulink are presented to demonstrate the performance of the adopted neutral point clamped power converters. The results revealed that the adopted models have the characteristics of high power factor, and high efficiency.
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