Bidirectional power conversion system and control method

A method comprising:

• transferring energy from an AC power source to a DC load through a power conversion device, wherein the energy is transferred from the AC power source to the power conversion device through a diode rectifier and a power factor correction device, wherein the diode rectifier and the power factor correction device are external to each other, and wherein the power conversion device includes a first switching network and a second switching network magnetically coupled to each other, and wherein a hybrid power device includes a combination of switches and diodes, a portion of the hybrid power device being configured as the diode rectifier;
• configuring the DC load as a DC power source and transferring energy from the DC power source to an AC load through the power conversion device, the diode rectifier and the power factor correction device;
• during the configuring the DC load as the DC power source and the transferring the energy from the DC power source to the AC load, configuring the second switching network as a first inverter;
• configuring the first switching network as a rectifier;
• and
• configuring switches of the hybrid power device and switches of the power factor correction device as a second inverter.

A system adapted to deliver power from an AC power source to a DC load during a first system configuration and to deliver power from a DC power source to an AC load during a second system configuration, the system comprising:

• an isolated power converter having a first input connected to an output of a diode rectifier and a second input connected to an output of a power factor correction device, wherein the diode rectifier and the power factor correction device are external to each other;
• and
• a plurality of switches and a plurality of diodes configured such that:
• the plurality of switches and the plurality of diodes form the diode rectifier and the power factor correction device when the system delivers power from the AC power source to the DC load;
• and
• the plurality of switches forms an inverter when the system is configured to deliver power from the DC power source to the AC load,
• wherein the plurality of switches and diodes includes a first switch and a second switch connected in series between a first voltage bus and a second voltage bus, a third switch and a fourth switch connected in series between the first voltage bus and the second voltage bus, a first diode and a second diode connected in parallel with the first switch and the second switch respectively, a third diode and a fourth diode connected in series between a third voltage bus and the second voltage bus, and a fifth diode and a sixth diode connected in series between the first voltage bus and the second voltage bus, and a common node of the fifth diode and the sixth diode being connected to the third voltage bus.