POWER CONVERTER CONTROLLER

摘要

PROBLEM TO BE SOLVED: To keep constant a system voltage by quickly detecting a variation of terminal voltage, compensating for a reactive current to keep constant an internal voltage of a self-oscillating converter and then adding this compensating value to the reference value of reactive current. SOLUTION: A terminal voltage detecting means 14 is provided to quickly detect a terminal voltage. An internal voltage constant control means 21 is also provided to compensate for a reactive power reference on the basis of the voltage variation detected by the terminal voltage detecting means 14 to keep constant the internal voltage of the self-oscillating converter. An output of the internal voltage constant controlling means 21 is added in an adder 31 provided at the output stage of a system voltage constant controlling means 23. Moreover, this added value is added 31 to an output of the reactive current detecting means 13 to input to the reactive current control means 24. An output of the terminal voltage detecting means 12 is added to 31 the output of this control means 24 to control the power converter 3 via the PWM gate control means 25. Thereby, the system voltage can be kept at the predetermined value.