| Summary: | 碩士 === 國立雲林科技大學 === 電機工程系碩士班 === 93 === Out of the prosperity of the high-technology industry and the determination of human beings to pursue the higher quality of lives, the supply of the power source has become the most essential link in people’s daily lives. An electric defect will result in not only the damage of system equipments but also the great impact on both the high-technology industry and people’s daily lives. Therefore, the multifunctional NPC (Neutral-Point-Clamped) Converter, which is about to be presented in this paper, can effectively improve the stability of the voltage and the current, both of them easily cause problems in the end of the power source. The static synchronous compensator of the NPC Converter aims to regulate the low and the over voltage. On the other hand, the active electric filter of the NPC Converter can ameliorate the harmonic and reactive power to achieve a balance of the three-phase current. Besides, regarding the characteristic of electric circuit, it enables the NPC Converter to save the cost by choosing the less pressure-proof components. In the following article, it is going to be confirmed by means of simulations and experiments that the multifunctional NPC Converter can be used to improve effectively the stability of both the voltage and the electric current, and moreover, to achieve the excellent quality of the electric power.
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