Control circuit for an inverter operable in an individual mode a

Details Control circuit for an inverter operable in an individual mode a Control circuit for an inverter operable in an individual mode a

1991-07-18

1993-10-19

Stephan, Steven L.

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

363 96, 363 98, H02M 744

Patent

active

052551768

ABSTRACT:
A control circuit for an inverter for converting DC voltage to AC voltage, operable in an individual mode and an interconnection mode, and including a synchronous compensating circuit in which, when the inverter is operating in a power system synchronous operation mode under control of a synchronous-interconnection control system, a quantity of an instantaneous voltage variation component occurring in the power system is separated, in order to detect respectively, a quantity of the variation of the component in same phase with a reference voltage vector of the output voltage of the inverter, and a quantity of the variation of the component orthogonal to the reference voltage vector. The detected variation quantities are respectively added to the outputs of a voltage adjuster and a phase adjuster in the synchronous-interconnection control system. The circuit is capable of compensating an instantaneous variation of the power system without a decrease of circuit stability.

REFERENCES:
patent: 4328454 (1982-05-01), Okuyama et al.
patent: 4367522 (1983-01-01), Forstbauer et al.
patent: 4800478 (1989-01-01), Takahashi
patent: 4823251 (1989-04-01), Kawabata et al.
patent: 4947310 (1990-08-01), Kawabata et al.
patent: 5041959 (1991-08-01), Walker

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