| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To enable compactly and inexpensively obtaining reactive power of a load without increasing a circuit scale. <P>SOLUTION: In the reactive power compensator interlocked with a power system and controlling voltage fluctuation of the power system, in order to compensate the reactive power of the load, a multiplier 15 obtains a reactive power instantaneous value q from the product of a voltage v2 delayed by 90°from a system voltage v1 and a load current if, while a multiplier 16 obtains the product q of a differential value obtained by averaging the load current for a predetermined period and the system voltage, and the values are added to obtain the reactive power. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
