Power Supply System and Power Supply Method
AssigneeHuawei Technologies Co., Ltd.
InventorsYongbing Gao, Yanfeng Li, Xun Wang
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Abstract
A power supply system includes at least one inverter, at least one cell string, and a transformer, where an input end of the at least one inverter is connected to an output end of the at least one cell string, an output end of the at least one inverter is connected to an input end of the transformer, and an output end of the transformer is configured to output a power supply voltage. The output end of the at least one inverter is connected to an output end of an inverter unit.
Claims20
A power supply system, comprising:
- a cell panel string;
- a first inverter coupled to the cell panel string and comprising a first input end and a first output end;
- a transformer coupled to the first inverter;
- a voltage controller coupled to the first inverter and comprising:
- a direct current (DC) converter configured to output a DC converted voltage;
- a second inverter coupled to the DC converter and comprising a second output end, wherein the second output end is coupled to the first output end;
- and
- a controller coupled to the DC converter and the second inverter and configured to adjust a bus voltage of the second inverter and at least one of an input voltage of the DC converter or an output voltage from the DC converter such that the voltage controller continuously adjusts a first voltage to earth value of the voltage controller starting from 0 volts.
A power supply method for a power supply system and comprising:
- obtaining, by a voltage controller, a first voltage or a second voltage, wherein the voltage controller comprises a first inverter, wherein the first voltage comprises a first voltage to earth value of a cell panel string, wherein the second voltage is a first bus voltage of a second inverter, wherein the cell panel string is coupled to an input end of the second inverter and comprises a negative electrode and a positive electrode, and wherein the power supply system comprises the cell panel string, the first inverter, a transformer, and the voltage controller;
- and
- adjusting, by the voltage controller, a second bus voltage of the first inverter and at least one of an input voltage of a DC converter or an output voltage of the DC converter based on the first voltage or the second voltage such that the voltage controller adjusts a second voltage to earth value of the negative electrode to 0 volts or higher or adjusts a third voltage to earth value of the positive electrode to 0 volts or lower.
A computer program product comprising computer executable instructions stored on a non-transitory computer-readable medium that, when executed by a processor in a power supply system, cause the power supply system to:
- obtain, from a voltage controller, a first voltage or a second voltage, wherein the first voltage comprises a first voltage to earth value of a cell panel string, wherein the second voltage is a first bus voltage of a first inverter, wherein the power supply system comprises the cell panel string, the first inverter, a transformer, and the voltage controller comprises a second inverter, wherein the cell panel string is coupled to an input end of the first inverter and comprises a negative electrode and a positive electrode;
- and
- adjust, from the voltage controller, a second bus voltage of the second inverter and at least one of an input voltage of a DC converter or an output voltage of the DC converter based on the first voltage or the second voltage such that the voltage controller adjusts a second voltage to earth value of the negative electrode to 0 volts or higher or adjusts a third voltage to earth value of the positive electrode to 0 volts or lower.
Dependencies are inferred from the claim text.