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.
Claims14
A method for implementing a multi-power distributed power storage and generation system comprising:
- feeding a single input port inverter an output voltage from a solar power plant and a DC storage plant via a common bus, the DC storage plant including a plurality of bi-directional DC/DC converters configured to charge and discharge a plurality of battery banks;
- maintaining constant power output of the DC storage plant in an MPPT region of the solar power plant for a given load using the power droop method;
- ramping down an output power of the DC/DC converters when a bus voltage is higher than the MPPT region;
- ramping up an output power of the DC/DC converters when a bus voltage is higher than the MPPT region;
- and
- maintaining maximum power output of the solar power plant;
- wherein the ramping up and ramping down of an output power is achieved, at least initially, without active control of the DC/DC converters.
A multi-power distributed storage system comprising:
- 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;
- and
- a controller configured to communicate with at least the second power source, and the single input port inverter;
- wherein the second power source includes a DC storage plant 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
- wherein when a grid power curtailment command is received at the single input port inverter the bus voltage rises, and both the first and second power sources reduce output power without an active control;
- and
- wherein as load increases, the bus voltage lowers and both the first and second power sources increase output power without an active control.
A method for implementing a multi-power distributed power storage system comprising:
- feeding a single input port inverter an output voltage from a first power source and a second power source including a plurality of converters;
- maintaining constant power output of the DC storage plant in an MPPT region of the solar power plant for a given load using the power droop method;
- ramping down an output power of the DC/DC converters when a bus voltage is higher than the MPPT region;
- ramping up an output power of the DC/DC converters when a bus voltage is higher than the MPPT region;
- and
- maintaining maximum power output of the single input port inverter;
- wherein the ramping up and ramping down of an output power is achieved, at least initially, without active control of the DC/DC converters.
Dependencies are inferred from the claim text.