| 摘要 |
<p>In a ground fault detection device 1, two photovoltaic strings 103 1 and 103 n are disconnected from a photovoltaic power generation system 100, a measurement of a first voltage value is performed for the one photovoltaic string 103 1 by a first measurement unit 3A, and in parallel therewith, a measurement of a second voltage value is performed for the other photovoltaic string 103 n by the second measurement unit 3B by executing various functions of a calculation control unit 4. Thus, a capacitance relative to a ground of a measurement target is reduced. Further, the photovoltaic string is electrically separated from a load device at the time of such a measurement. Further, separate measurements are performed on the one and other photovoltaic strings 103 1 and 103 n in the disconnected state, and the first and second voltage values are measured in parallel.</p> |
