Interconnection for electric power system

Details Interconnection for electric power system Interconnection for electric power system

1991-03-01

1992-05-05

Stephan, Steven L.

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

363 97, 363 98, 363131, 363132, H92M 7537

Patent

active

051113775

ABSTRACT:
In a power interconnection system between an electric power system and a power converter which makes AC power from a DC power source, a positive feed-back loop is constituted so as to include a frequency deviation detector, a band-pass filter, an inert zone circuit, an amplifier, an adder, a phase controller, an inverter controller, an inverter and an interconnection reactor. Thereby a sufficiently great frequency fluctuation is made after opening of a branch line switch, so as to produce a frequency abnormality signal to be given to a disconnection switch; and disconnection is made certainly.

REFERENCES:
patent: 3659060 (1972-04-01), Wolff et al.
patent: 4802077 (1989-01-01), Fujii et al.
patent: 4820891 (1989-04-01), Tanaka et al.

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