Solar inverter and control method
First Claim
1. A power generation system comprising:
- a photovoltaic (PV) module to generate direct current (DC) power;
a controller for determining a maximum power point for the power generation system;
a boost converter comprising boost inductors, diodes, and switching devices for receiving control signals from the controller to boost the power from the PV module to a threshold voltage required to inject sinusoidal currents into the grid;
a direct current (DC) to alternating current (AC) multilevel inverter to supply the power from the PV module to a power grid; and
a bypass circuit for bypassing the boost inductors, diodes, and switching devices of the boost converter when an input voltage of the DC to AC multilevel inverter is higher than or equal to the threshold voltage.
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Accused Products
Abstract
A power generation system including a photovoltaic (PV) module to generate direct current (DC) power is provided. The system includes a controller to determine a maximum power point for the power generation system and a boost converter for receiving control signals from the controller to boost the power from the PV module to a threshold voltage required to inject sinusoidal currents into the grid. A DC to alternating current (AC) multilevel inverter is provided in the system to supply the power from the PV module to a power grid. The system also includes a bypass circuit to bypass the boost converter when an input voltage of the DC to AC multilevel inverter is higher than or equal to the threshold voltage.
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Citations
18 Claims
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1. A power generation system comprising:
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a photovoltaic (PV) module to generate direct current (DC) power; a controller for determining a maximum power point for the power generation system; a boost converter comprising boost inductors, diodes, and switching devices for receiving control signals from the controller to boost the power from the PV module to a threshold voltage required to inject sinusoidal currents into the grid; a direct current (DC) to alternating current (AC) multilevel inverter to supply the power from the PV module to a power grid; and a bypass circuit for bypassing the boost inductors, diodes, and switching devices of the boost converter when an input voltage of the DC to AC multilevel inverter is higher than or equal to the threshold voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 18)
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16. A method of delivering solar power from a power generation system comprising a photovoltaic (PV) module, the method comprising:
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determining a threshold voltage for generating sinusoidal currents for the power generation system; determining whether an output voltage of the PV module at maximum power production is higher than the threshold voltage; when the output voltage of the PV module is less than the threshold voltage, boosting the power from the PV module to achieve the threshold voltage level via a boost converter comprising boost inductors, diodes, and switches and then converting the boosted power to alternating current (AC) power; and when the output voltage of the PV module is higher than the threshold voltage, bypassing the boost inductors, diodes, and switches of the boost converter and directly converting the power from the PV module to AC power. - View Dependent Claims (17)
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Specification