| Summary: | 碩士 === 崑山科技大學 === 電機工程研究所 === 93 === Recently the wide growth of nonlinear load has issued the problem of power quality. The requirement of power quality for precise equipment, which is often used in the industrial process, is very strict. In this paper, a shunt active power conditioner (APC) is proposed for electric power quality improvement in the load side to improve the power quality and advance the reliability of precise equipment. The developed active power conditioner is configured by a power converter, a link inductor and a battery set. The power converter is used to supply a high quality voltage to the load. The link inductor is inserted between the mains and the power converter to block the power disturbance from the mains, and a battery set is placed at the dc side of power converter to supply the back-up power. Hence, the proposed active power conditioner can solve the problems of power quality, including mains under-voltage, over-voltage, voltage spike, outage and pollution. Moreover, the active power conditioner can also be operate as an interface of renewable energy to generate an high quality AC energy to the load or to the utility. Considering the progress of electronic industry, the developed active power conditioner is implemented by a CPLD chip to simplify the control circuit. Finally, a single-phase prototype is developed to verify the performance of CPLD based active power conditioner.
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