| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a distributed power plant which can prevent an overvoltage state that occurs immediately after power failure in a system even if extreme unbalance is occurring in the power load state of two pieces of voltage lines, being possible of systematic interconnection with a single-phase three-line system of system power source. <P>SOLUTION: This distributed power plant is equipped with a DC power source 2, an inverter circuit part 3 which converts the DC power outputted from the DC power source 2 into effective voltage of single-phase AC power the same as between the two pieces of voltage lines U and V of a system power source 40 and outputs it to a pair of output terminals OUT1 and OUT2 not connected with the neutral line N of the system power source 40, a controller 4 which controls the action of the inverter circuit part 3, and voltage detectors 13 and 14 which detect each output voltage at the output terminals OUT1 and OUT2 separately, on the basis of the neutral line N. In case that the controller 4 detects an overvoltage state where the absolute value of at least either output voltage detected separately with voltage detectors 13 and 14 is over specified reference voltage, it controls the action of the inverter circuit part 3 so that the absolute value of the output voltage may drop. <P>COPYRIGHT: (C)2008,JPO&INPIT |
