DC/AC CONVERTER APPARATUS CONFIGURABLE AS GRID-CONNECTED OR STAND-ALONE AND POWER CONVERSION AND GENERATION SYSTEM COMPRISING SUCH DC/AC CONVERTER APPARATUS

摘要

A DC/AC converter apparatus comprising:
input terminals (10) to be connected to a DC power source;a DC/AC conversion unit (11) adapted to receive input DC electrical power via the input terminals and to convert the input DC electrical power into AC electrical power, the DC/AC conversion unit comprising two output terminals (12);two AC backup output terminals (14);a switch arrangement (13) adapted to selectively connect the two AC output terminals to the grid terminals and to the two AC backup output terminals;a control unit (16) associated to the switch arrangement and adapted to:
drive the switches of the switch arrangement,sense when an AC voltage at the grid terminals is below a predetermined threshold; andautomatically drive the switches of the switch arrangement in such a way to disconnect the two AC output terminals from the grid terminals and to connect the two AC output terminals to the two AC backup output terminals when the AC grid voltage is below a said predetermined threshold.

主权项

1. A DC/AC converter apparatus comprising:
input terminals to be connected to a DC power source; a DC/AC conversion unit adapted to receive input DC electrical power via said input terminals and to convert said input DC electrical power into AC electrical power, said DC/AC conversion unit comprising two AC output terminals; two AC backup output terminals; a switch arrangement adapted to selectively connect said two AC output terminals to the grid terminals and to said two AC backup output terminals a control unit associated to said switch arrangement and adapted to drive the switches of said switch arrangement, wherein said control unit is further adapted to sense when an AC voltage at said grid terminals is below a predetermined threshold, and to automatically drive the switches of said switch arrangement in such a way to disconnect said two AC output terminals from said grid terminals and to connect said two AC output terminals to said two AC backup output terminals when the AC voltage at said grid terminals is below said predetermined threshold.