Patent ID: 8218341

Claim:
An integrated power conditioning unit, comprising: a DC bus; a first terminal for connection to first AC equipment; a second terminal for connection to second AC equipment; a third terminal for connection to third AC equipment; a first inverter circuit providing bi-directional AC-DC conversion between a first AC power signal and a first DC power signal, the first DC power signal flowing from/to the DC bus and the first AC power signal flowing from/to the first terminal; a converter assembly providing bi-directional AC-DC conversion between a second AC power signal and a second DC power signal, the second DC power signal flowing from/to the DC bus and the second AC power signal flowing from/to the second terminal, wherein the converter assembly comprises: a DC-DC bi-directional converter providing bi-directional DC-DC conversion between the second DC power signal and a third DC power signal; an AC-DC bi-directional inverter connected to the DC-DC bi-directional converter and providing bi-directional AC-DC conversion between the third DC power signal and the second AC power signal; and a transformerless filter connected to the AC-DC bi-directional inverter and configured together with the AC-DC bi-directional inverter to generate the third DC power signal; and a rectifier and DC-DC converter together configured to provide AC-DC conversion between a third AC power signal and a fourth DC power signal, the fourth DC power signal selectively flowing to the DC bus via a switch and the third AC power signal flowing from the third terminal.