ISOLATED OPERATION DETECTION DEVICE, ISOLATED OPERATION DETECTION METHOD, AND POWER CONDITIONER EQUIPPED WITH ISOLATED OPERATION DETECTION DEVICE

To provide an isolated operation detection device capable of suppressing induction of a voltage flicker phenomenon.SOLUTION: An isolated operation detection device 3 for detecting isolated operation of a power conditioner 1 comprises: an isolated operation active detection unit 36 that detects the isolated operation by an active system; a frequency detection unit 31 that detects a frequency f of an output voltage of the power conditioner 1; a first determination unit 32 that determines whether or not the frequency f detected by the frequency detection unit 31 matches a first condition, and determines that the power conditioner is in the isolated operation state when the frequency f matches the first condition; and a second determination unit 33 that determines whether or not the frequency f matches a second condition, and causes the isolated operation active detection unit 36 to start detection after a waiting time elapses when the frequency f matches the second condition.SELECTED DRAWING: Figure 1 【課題】電圧フリッカ現象を誘発することを抑制可能な単独運転検出装置を提供する。【解決手段】パワーコンディショナ１の単独運転を検出する単独運転検出装置３において、能動方式により単独運転を検出する単独運転能動検出部３６と、パワーコンディショナ１の出力電圧の周波数ｆを検出する周波数検出部３１と、周波数検出部３１が検出した周波数ｆが第１条件に一致したか否かを判定し、一致した場合に、単独運転状態であると判断する第１判定部３２と、周波数ｆが第２条件に一致したか否かを判定し、一致した場合、待機時間経過後に、単独運転能動検出部３６による検出を開始させる第２判定部３３とを備えた。【選択図】図１