Power system protection system

Details Power system protection system Power system protection system

2004-03-16

2009-08-25

Paladini, Albert W (Department: 2836)

Electrical transmission or interconnection systems

Plural load circuit systems

Selectively connected or controlled load circuits

Reexamination Certificate

active

07579712

ABSTRACT:
A power system protection system prevents a voltage drop resulting from the reactive power characteristic of a power system. A main device for acquiring a system electric quantity of one or a plurality of upper substations detects a voltage drop resulting from the reactive power characteristic of the power system and transmits a detection signal of the voltage drop to a terminal device for acquiring a system electric quantity of one or a plurality of lower substations. Each terminal device sequentially sheds loads starting from those suffering more from the influence of the voltage drop resulting from the reactive power characteristic based on the load voltage and load current of a load bus.

REFERENCES:
patent: 2003/0187550 (2003-10-01), Wilson et al.
patent: 2004/0010350 (2004-01-01), Lof et al.
patent: 6-096216 (1989-03-01), None
patent: 01-227628 (1989-09-01), None
patent: 09-117064 (1997-05-01), None
patent: 2002-058159 (2002-02-01), None

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