VARIABLE SPEED PUMPING-UP ELECTRICAL POWER SYSTEM

摘要

Disclosed in a variable speed pumping-up electrical power system comprising a variable speed generator/motor, a frequency converter connected between the generator/motor and an a.c. power system, a controller controlling an effective power input to the generator/ motor by controlling the frequency converter on the basis of the difference between an actual effective power input from the a.c. power system and an externallyapplied effective power command, and a correction circuit correcting the effective power command on the basis of the difference between the frequency of the a.c. power system and a frequency setting.