Islanding detection device, islanding detection method and power conditioner equipped with islanding detection device

摘要

Problem to be solved: to provide a single operation detection device capable of suppressing voltage flicker phenomenon.In the single operation detecting device 3 for detecting the single operation of the power conditioner 1,The islanding active detector 36 detects an independent operation by an active method andA frequency detector 31 for detecting the frequency f of the output voltage of the power conditioner 1 andIt is determined whether or not the frequency f detected by the frequency detector 31 coincides with the first condition.ReturnsA first determination part 32 which judges that it is in a standstill stateIt is determined whether or not the frequency f coincides with the second condition.ReturnsAfter the wait timeA second determination section 33 for starting detection by the single operation active detecting section 36 is provided.Diagram