DC/DC converter for distributed storage and solar systems
AssigneeNextracker LLC
InventorYang Liu
Life of this patent
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Abstract
A multi-power distributed storage system including a first power source; a second power source electrically connected to a common bus with the first power source; a single input port inverter electrically connected to the common bus. The system including a controller configured to communicate with at least the second power source, and the single input port inverter. The second power source including a plurality of battery banks and a plurality of bi-directional DC/DC converters configured to charge and discharge the plurality of battery banks and provide DC to the single input port inverter.
Claims10
A method comprising:
- applying power generated by solar arrays to a common bus;
- discharging, by DC/DC converters, power from energy storage devices to the common bus;
- applying a voltage on the common bus to a single input port inverter;
- maintaining constant power output from the DC/DC converters in a maximum power point tracking (MPPT) region of the solar arrays using a power droop method;
- controlling power output from the DC/DC converters based on a power demand of an external load;
- decreasing an output power of the DC/DC converters when a voltage on the common bus is greater than the MPPT region;
- increasing an output power of the DC/DC converters when a voltage on the common bus is less than the MPPT region;
- and
- maintaining maximum power output of the solar arrays.
A multi-power distributed storage system comprising:
- solar modules coupled to a common bus;
- energy storage devices;
- DC/DC converters coupled between the energy storage devices and the common bus, the DC/DC converters configured to control power output from the energy storage devices based on a power demand of an external load;
- a single input port inverter coupled to the common bus;
- and
- a system controller configured to communicate with at least the energy storage devices and the single input port inverter,
- wherein, when a grid power curtailment command is received at the single input port inverter and a voltage on the common bus rises, the DC/DC converters reduce output power,
- wherein, when a load increases and the voltage on the common bus decreases, the DC/DC converters increase output power from the energy storage devices, and
- wherein, when maintaining constant power, constant power output from the DC/DC converters is maintained using a power droop method.
A method comprising:
- applying power output from solar arrays and energy storage devices to a single input port inverter via a common bus;
- maintaining constant output power of a DC/DC converter coupled to the energy storage devices in a maximum power point tracking (MPPT) region of the solar arrays using a power droop method;
- controlling, by the DC/DC converters, power output from the energy storage devices based on a power demand of an external load;
- decreasing the output power of the DC/DC converters when a voltage on the common bus is greater than the MPPT region;
- increasing the output power of the DC/DC converters when a voltage on the common bus is less than the MPPT region;
- and
- maintaining a maximum output power of the single input port inverter.
Dependencies are inferred from the claim text.