VOLTAGE INSERTION CONTROL CIRCUIT OF SERIES-TYPE SYSTEM COMPENSATOR

摘要

PROBLEM TO BE SOLVED: To simplify the operating circuit of a series-type system compensator, which inserts the three-phase AC voltage of optional phase, amplitude, and frequency in series into a system path, and keeps load-end voltage at an objective voltage value, and to reduce errors. ;SOLUTION: The magnitude of power-reception-end voltage fundamental wave components is extracted with a three/two-phase converter 1, a rotational coordinate 2, a filter 3, etc., and the effective components and ineffective components of the system current fundamental wave are, extracted with a three-phase/two-phase converter 10, a rotational coordinate converter 11, and a filter 12, etc., and the objective voltage fundamental wave components which become the object of the load-end voltage are obtained by an objective voltage computing element 4, whereby the voltage that is a series-type system compensator should insert can be obtained simply and with accuracy.;COPYRIGHT: (C)1999,JPO