| 摘要 |
<P>PROBLEM TO BE SOLVED: To perform reverse power flow preventing operation for each phase of a single-phase three-wire type utility power system without using two sets of completely independent inverter circuits or two isolation transformers. <P>SOLUTION: A smoothing circuit 7 is connected between output terminals of a DC generator 3, and a common connection wire of smoothing capacitors 7a, 7b which constitute the smoothing circuit 7 is connected with a neutral line 1n of the single-phase three-wire type utility power system 1. An inverter circuit 8 and an AC filter circuit 10 comprising a half bridge connection configuration are provided between the DC generator 3 and a voltage wire 1a, and an inverter circuit 9 and an AC filter circuit 11 comprising the half bridge connection configuration are provided between the DC generator 3 and a voltage wire 1b. AC output control circuits 14, 15 perform complete reverse power flow preventing control based on receiving power values Wa, Wb and generating output reference values PIa*, PIb*. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
