| 摘要 |
<p>PURPOSE:To early detect disconnection of an output side of an inverter from an AC system in a protecting device for the inverter to be operated by converting DC power into AC power and linking it to the AC system. CONSTITUTION:The reverse charge protecting device for a system linkage inverter detects a voltage phase and frequency of an output side of an inverter 2 by detectors 10, 22, 25, obtains a reference phase from the voltage phase, generates a current reference of a phase responsive to this reference phase by generators 12, 26, controls an output current of the inverter by a controller 13, corrects the reference phase in response to the frequency by correctors 23, 24, early detects disconnection of the output side of the inverter from an AC system and protects it.</p> |
