Parallel Connected Inverters
AssigneeSolaredge Technologies Ltd.
InventorsMeir Adest, Guy Sella, Lior Handelsman, Yoav Galin, Amir Fishelov, Meir Gazit, Tzachi Glovinski, Yaron Binder
Life of this patent
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Abstract
A distributed power system wherein a plurality of power converters are connected in parallel and share the power conversion load according to a prescribed function, but each power converter autonomously determines its share of power conversion. Each power converter operates according to its own power conversion formula/function, such that overall the parallel-connected converters share the power conversion load in a predetermined manner.
Claims17
A distributed power system comprising:
- a direct current (DC) power source;
- a plurality of inverters with respective inverter inputs adapted for connection in parallel to said DC power source and with respective inverter outputs adapted for connection in parallel;
- and
- a plurality of control modules coupled respectively to said inverter inputs, said control modules respectively controlling current drawn by said inverters from said DC input responsive to selectably either the voltage or power of the DC input, whereby said inverters share the load of inverting power from DC power source to output power.
In a distributed power system including:
- a direct current (DC) power source;
- a plurality of inverters coupled in parallel to the DC power source;
- said inverters inverting power from the DC power source to an output power;
- a method comprising the steps of:
- autonomously controlling current drawn by each of said inverters from DC power source responsive to selectably either the voltage or power of the DC input;
- and
- upon reaching selectably either a voltage or power equilibrium in the DC input, said inverters sharing load of said inverting power from said DC power source to said output power.
A distributed power system comprising:
- a direct current (DC) power source;
- a plurality of power converters with respective power converter inputs adapted for connection in parallel to said DC power source and with respective power converter outputs adapted for connection in parallel;
- and
- a plurality of control modules connected respectively to said power converter inputs, said control modules respectively controlling current drawn by said power converters from said DC input responsive to selectably either the voltage or power of the DC input until selectably either a voltage or power equilibrium is reached in said DC input, whereby said power converters share the load of inverting power from DC power source to output power.
A method for controlling load distribution of a plurality of inverter coupled in parallel, the method comprising the steps of:
- autonomously controlling current drawn by each of said inverters from a DC input, wherein said controlling current is responsive to said DC input;
- to thereby reach an equilibrium in said DC input, whereby each inverter autonomously draws a portion of the load of inverting power from said DC input to output power to distribute the conversion load.
A system for controlling load balancing of a plurality of inverters, the system comprising:
- a means for individually controlling current drawn by each one of said inverters from a DC input, wherein said controlling current is responsive to said DC input;
- whereby the inverter autonomously draws a portion of the load of inverting power from said DC input to output power.
A power system comprising:
- a DC power source;
- a plurality of power converters coupled to the DC source in parallel;
- a plurality of control modules, each coupled to a respective one of the power converters, and each configured to monitor the DC power source and vary the operation of the respective power converter according to the performance of the DC power source.
Dependencies are inferred from the claim text.