| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a voltage drop detector capable of detecting the voltage drop on the power supply side, without affecting the voltage drop due to transformer impedance. <P>SOLUTION: A transformer for instrument 14 is provided on the primary side of a transformer installed on a power system, and the voltage detected by the transformer 14 is introduced into a control section of an inverter 6 so as to perform power compensation corresponding to the primary voltage. The voltage and current detected by a transformer for instrument 5 and an instrument current transformer provided on the secondary side of the transformer are introduced into an impedance drop compensating section to compute the power supply voltage, and the computed value is introduced into control section of the inverter and compensation is carried out. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
