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US 8,058,747 B2Granted
Systems to connect multiple direct current energy sources to an alternating current system
AssigneeTigo Energy, Inc.
InventorsMordechay Avrutsky, Ron Hadar, Shmuel Arditi
Life of this patent
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Abstract
High voltage direct current systems to connect direct current energy sources to an alternating current system. In one aspect, a system includes a plurality of direct current modules having variable direct current inputs; an inverter; and a direct current bus to connect the direct current modules to the inverter, where the bus is configured to operate at a nominal voltage higher than 100 volts and to operate within 10 percent of the nominal operating voltage.
Claims20
A system, comprising:
- a plurality of direct current modules having variable direct current inputs and each module having a step up converter;
- an inverter;
- and
- a direct current bus connecting the direct current modules to the inverter, the modules and the bus together being configured to operate at a nominal operating voltage higher than 100 volts and to operate within 10 percent of the nominal operating voltage.
1 more element
An energy system, comprising:
- a direct current bus;
- a plurality of photovoltaic panels;
- a plurality of direct current modules each including a step up converter and wherein the modules are coupled between the plurality of photovoltaic panels and the bus;
- and
- an inverter coupled between the bus and a power grid, wherein the direct current modules and the bus are configured together to operate at a nominal voltage higher than 200 volts and to operate within 4 percent of the nominal voltage of the bus even when a current supplied by the photovoltaic panels is reduced to a level to power the inverter without substantial output to the power grid.
2 more elements
Dependencies are inferred from the claim text.