System and Method for Combining Electrical Power from Photovoltaic Sources
First Claim
1. A photovoltaic system comprising:
- a plurality of photovoltaic (PV) panels providing DC outputs at a first voltage;
a plurality of inverter modules, each of the inverter modules connected to a respective PV panel, each of the inverter modules comprising;
a maximum power point tracker (MPPT) for independently monitoring and controlling the respective PV panel, a switch regulator for converting the DC output to an AC output;
an insulating transformer for receiving the AC output and inverting the AC output at about the first voltage to a second voltage; and
a rectifier for rectifying the AC output to a second DC output at about the second voltage; and
a main inverter receiving two power terminals;
wherein the second DC outputs of the plurality of inverter modules are connected in parallel to the two power terminals at the second voltage,wherein the second DC outputs are inverted to an AC power by the main inverter.
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Abstract
A photovoltaic system with photovoltaic (PV) panels is described. Each of the PV panels has a corresponding inverter module. The inverter module includes a maximum power point tracker (MPPT) for independently monitoring and controlling the respective PV panel, a switch regulator for converting the DC output to an AC output; an insulating transformer for receiving the AC output and inverting the AC output at about the first voltage to a second voltage; and a rectifier for rectifying the AC output to a second DC output at about the second voltage. The photovoltaic system further includes a main inverter with two power terminals. The second DC outputs of the inverter modules are connected in parallel to the two power terminals at the second voltage, and the second DC outputs are inverted to an AC power by the main inverter.
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Citations
20 Claims
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1. A photovoltaic system comprising:
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a plurality of photovoltaic (PV) panels providing DC outputs at a first voltage; a plurality of inverter modules, each of the inverter modules connected to a respective PV panel, each of the inverter modules comprising; a maximum power point tracker (MPPT) for independently monitoring and controlling the respective PV panel, a switch regulator for converting the DC output to an AC output; an insulating transformer for receiving the AC output and inverting the AC output at about the first voltage to a second voltage; and a rectifier for rectifying the AC output to a second DC output at about the second voltage; and a main inverter receiving two power terminals; wherein the second DC outputs of the plurality of inverter modules are connected in parallel to the two power terminals at the second voltage, wherein the second DC outputs are inverted to an AC power by the main inverter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of providing electrical power from photovoltaic sources comprising:
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providing DC outputs at a first voltage from a plurality of photovoltaic (PV) panels; converting each of the DC output to a respective AC output at a respective inverter module; receiving the AC output at an insulating transformer of the inverter module, inverting the AC output at about the first voltage to a second voltage; rectifying the AC output to a second DC outputs at about the second voltage; connecting in parallel the second DC outputs from the respective inverter module of the plurality of photovoltaic (PV) panels to two power terminals of a main inverter; and inverting the second DC outputs to an AC power by the main inverter; wherein the second DC outputs of the plurality of inverter modules are connected in parallel to the two power terminals at the second voltage. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification