Safety switch for photovoltaic systems

  • US 11,018,623 B2
  • Filed: 01/15/2019
  • Issued: 05/25/2021
  • Est. Priority Date: 04/05/2016
  • Status: Active Grant
First Claim
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1. A system comprising:

  • a power generation installation comprising;

    a plurality of power sources comprising a first power source and a second power source connected to each other at a first node, andat least one switching element connected, in parallel with the first power source, between the first node and a second node, wherein the second power source is serially connected, at the first node, to the parallel connected at least one switching element and first power source, and wherein the parallel connected at least one switching element and first power source are connected, at the second node, to a power converter; and

    a controller configured to;

    detect a sensor measurement indicative of a potentially unsafe condition at the power generation installation;

    control the at least one switching element to create a short circuit across the first power source but not across the second power source;

    receive a sensor measurement indicating that the potentially unsafe condition is no longer present; and

    control the at least one switching element to eliminate the short circuit across the first power source.

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