Power system compensator apparatus and power converter apparatus

Details Power system compensator apparatus and power converter apparatus Power system compensator apparatus and power converter apparatus

1995-11-02

1997-07-08

Krishnan, Aditya

Electricity: power supply or regulation systems

For reactive power control

Using converter

H02J 306

Patent

active

056465114

ABSTRACT:
A power system compensator apparatus comprising a power converter unit that works in series with the transmission of a power system and switching control means for controlling the link voltage (V.sub.LINK) of the non-power system side. The switching control means controls the phase of, at least, the fundamental frequency of the power system. The power converter unit contains a static power converter transformer with phase differences taking place the secondary windings of the power converter unit. The static power converter unit is operated in non-PWM or fixed pulse width ratio. Switching rate is minimized. Loss is lowered while economy of operation is improved. Since the voltage that works in series with the power transmission line is controlled, direct compensation of system reactance voltage and direct control of line current are performed. Improved performance thus results.

REFERENCES:
patent: 5198746 (1993-03-01), Gyugyi et al.
patent: 5309346 (1994-05-01), Gyugyi
patent: 5343139 (1994-08-01), Gyugyi et al.
patent: 5400240 (1995-03-01), Araki
patent: 5422518 (1995-06-01), Sashida
Einar Larsen, et al., "Benefits of GTO-Based Compensation Systems for Electric Utility Applications"; GE Industrial and Power Systems; pp. 1-8, 1991 IEEE.
Shosuke Mori, et al., "Development of a Large Static VAR Generator Using Self-Commutated Inverters for Improving Power System Stability"; The Kansai Electric Power Co., Inc.; pp. 1-7; 1992 IEEE.

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