| Summary: | 碩士 === 長庚大學 === 電機工程學系 === 104 === Inverters in back to back connection are utilized to convert the voltage and frequency of the power source to another format. Typical application of inverters is the wind power system. This study presents a back to back inverter for equal voltage and frequency format conversion. In the back to back inverter, one inverter works to get active power in order to maintain the dc-link voltage, and another inverter returns part of the active power to the power grid. The power grid affords only the power loss of the inverter, which benefits the test of the inverter rated above 10kW under general distribution line. Experimental setups include single inverter reactive power control and back to back inverters active and reactive power controls. Experimental results show that the power returns to the power grid is close to originally put in, and the power capability can achieves 15kW.
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