Load management and control apparatus

Details Load management and control apparatus Load management and control apparatus

1997-04-25

1998-08-25

Wong, Peter S.

Electricity: power supply or regulation systems

For reactive power control

Using converter

323210, 323255, G05F 170, G05F 114

Patent

active

057986347

ABSTRACT:
A load management and control apparatus comprising a control unit in which system voltage and a power flow state are measured to make an arithmetic decision by using the resultant variations in voltage and reactive power so as to estimate system reactance, and the estimated system reactance is used to carry out control operation while establishing unique relationship between tap changing operation of the transformer and connection or disconnection of the reactive power supply unit in the receiving side sub-station so as to set voltage and power factor of the receiving side of power system in desired ranges, whereby in a receiving end side substation, it is possible to prevent frequent tap changing operation of the transformer, and adjust system voltage not only to reduce the voltage deviation but also to provide integrated and reasonable management of the reactive power.

REFERENCES:
patent: 4752726 (1988-06-01), Aoyama
patent: 4755738 (1988-07-01), Shimamura et al.
patent: 4812669 (1989-03-01), Takeda et al.
patent: 5136233 (1992-08-01), Klinkenberg et al.
patent: 5349522 (1994-09-01), Konishi et al.
patent: 5402057 (1995-03-01), D'Aquila et al.
patent: 5422561 (1995-06-01), Williams et al.
patent: 5428551 (1995-06-01), Trainor et al.

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