WITH the increase of distributed generations (DG), more and more renewable energy-based generation units are integrated into the power systems, and they are in the form of ac or dc sources,such as the wind turbines,photovoltaic panels, biofuel and biomass genertions. Forming alocal dc or ac active distribution network is an efficient way to integrate these DGs to support the local loads, as well as feed the utility grid [1]– [4]. The interconnection between the dc and ac active networks could become necessary,and a high effective interface converter would be the key issue to realize this connection. The interface converter between ac and dc systems normally fulfills the following requirements [5]: 1) voltage buck-boost capability; 2) bidirectional power control; 3) galvanic isolation
WITH the increase of distributed generations (DG), more and more renewable energy-based generation units are integrated into the power systems, and they are in the form of ac or dc sources,such as the wind turbines,photovoltaic panels, biofuel and biomass genertions. Forming alocal dc or ac active distribution network is an efficient way to integrate these DGs to support the local loads, as well as feed the utility grid [1]– [4]. The interconnection between the dc and ac active networks could become necessary,and a high effective interface converter would be the key issue to realize this connection. The interface converter between ac and dc systems normally fulfills the following requirements [5]: 1) voltage buck-boost capability; 2) bidirectional power control; 3) galvanic isolation
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