Grid-linked power supply

• Main Authors: Lansberry, Geoffrey B, Holmansky, Evgeny N
• Format: Patent
• Language: English
• Published: 17.09.2002

The present invention relates to an economical power supply topology, which provides 100 percent of the required power to residential, commercial or industrial consumers, and that, further, protects consumers from power surges, dips, and outages; and, more particularly, to a on-site, grid-linked distributed electricity generation power supply topology that draws power for normal operation from fuel cells and/or other alternative energy sources, relying, on power from a public utility grid, which is coupled to an inverter through the direct current bus rather than in parallel with the inverter, to meet abnormal or anomalous peak power demand. A grid-linked power supply is described. An inverter, at least one distributed energy source to meet normal, non-peak power demand, a connection to a public utility grid to meet peak power demand requirements, and a converter for regulating delivery of power from the distributed energy source or the public utility grid are connected by bus lines. A topology for the grid-linked power supply has an inverter and a DC/DC converter that is connected to the distributed energy source. The inverter and converter are connected by bus lines, and a bias voltage is provided to select drawing power from the distributed energy source or the public utility grid.