Apparatus and method for hybrid power supply in offshore plant

The present invention relates to a hybrid power supply apparatus and method using the regeneration power generated in offshore plants. According to one embodiment of the present invention, in the hybrid power supply in offshore plants, the generator; AC / DC converter for supplying a DC bus is converted to an alternating current generated from the generator into a direct current; Power load which is connected to the DC bus to generate regenerative electric power; A first power storage unit to the voltage of the DC bus storage power while maintaining a first time for the first threshold value or more, and when the maintaining the second threshold value or less for 2 hours, supplying the stored power to the DC bus; And first includes a resistance portion, and the third time is a hybrid power supply of the longer and offshore plants than the first temporal apparatus when consuming power maintaining the voltage on the DC bus, the at least for three hours the first threshold value It is provided.