Capacitance control for a static var generator

Details Capacitance control for a static var generator Capacitance control for a static var generator

1983-06-28

1986-07-22

Salce, Patrick R.

Electricity: power supply or regulation systems

For reactive power control

Using impedance

323207, H02J 318

Patent

active

046022066

ABSTRACT:
Improved control of a var generator of the static type using thyristors wherein control is accomplished by generating a capacitance command representing the value of an equivalent capacitor, as opposed to a current command or a var command. The gating times or angles of the thyristors are determined by the capacitance command acting through an intermediate control which may be an open-loop feed-forward control or a closed loop feedback control operating in response to the difference between the capacitance command and a capacitance feedback, or a combination of both these types of control. The effect of the capacitance control is to provide an improved response of the var generator for changes in source voltage or frequency. The capacitance control also provides an improved linearity of control.

REFERENCES:
patent: 4348631 (1982-09-01), Gyugyi et al.
"Reactive Power Generation and Control by Thyristor Circuits" by Laszlo Gyugyi, IEEE Transactions on Industry Publications, vol. 1A-15, No. 5, Sep./Oct. 1979, pp. 521-532-see especially 524-525.

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