System and method for protection during inverter shutdown in distributed power installations
AssigneeSolaredge Technologies Ltd.
InventorsMeir Adest, Guy Sella, Lior Handelsman, Yoav Galin, Amir Fishelov, Meir Gazit
Life of this patent
Estimating the term…
Abstract
A protection method in a distributed power system including of DC power sources and multiple power modules which include inputs coupled to the DC power sources. The power modules include outputs coupled in series with one or more other power modules to form a serial string. An inverter is coupled to the serial string. The inverter converts power input from the string and produces output power. When the inverter stops production of the output power, each of the power modules is shut down and thereby the power input to the inverter is ceased.
Claims15
A distributed power system comprising:
- a plurality of DC power converters configured to provide DC output power;
- an inverter coupled, via input DC conductors, to the plurality of DC power converters and configured to convert the DC output power of the plurality of DC power converters into an AC output power to an electrical load, wherein the inverter comprises an input capacitor coupled across the input DC conductors;
- a monitoring controller configured to monitor at least one electrical parameter of the electrical load and detect that the at least one electrical parameter of the electrical load is out of a predetermined specification;
- and
- a switch circuit disposed in parallel to the input capacitor, wherein the switch circuit is activated based on the monitoring controller detecting the at least one electrical parameter of the electrical load being out of the predetermined specification.
A method comprising:
- monitoring, by a monitoring controller coupled to an inverter, at least one electrical parameter of an electrical load connected to an output terminal of the inverter;
- detecting, by the monitoring controller, the at least one electrical parameter of the electrical load being out of a predetermined specification;
- and
- activating, based on the detecting, a switch circuit coupled to an input of the inverter,
- wherein the switch circuit is connected in parallel to an input capacitor of the inverter.
An apparatus comprising:
- an inverter coupled, via input DC conductors, to a plurality of DC power converters and configured to convert DC output power of the plurality of DC power converters into an AC output power to an electrical load;
- and
- a switch circuit connected in parallel to an input capacitor of the inverter,
- wherein the switch circuit is configured to be activated based on at least one electrical parameter of the electrical load being out of a predetermined specification.
Dependencies are inferred from the claim text.