VAR generator system with minimal standby losses

Details VAR generator system with minimal standby losses VAR generator system with minimal standby losses

1986-12-18

1988-01-12

Salce, Patrick R.

Electricity: power supply or regulation systems

For reactive power control

Using impedance

323206, 323214, 323218, G05F 170

Patent

active

047194022

ABSTRACT:
In a hybrid switched-capacitor controlled-reactor static VAR compensator including a fixed-capacitor, hysteresis on switching-OFF a switchable capacitor of the capacitance bank is performed with a minimal fixed-hysteresis at the entrance of the standby region and with a temporary and variable-hysteresis in relation to any operating point in the standby region whenever maintaining the capacitor OFF is required. Since the fixed-hysteresis operates most often to prevent switching-OFF of the capacitor while the variable-hysteresis will operate less often, the losses at standby are minimized during thyristor-switched capacitor operation through most of this.

REFERENCES:
patent: 3989999 (1976-11-01), Thompson et al.
patent: 3999117 (1976-12-01), Gyugyi et al.
patent: 4234843 (1980-11-01), Gyugyi et al.
patent: 4307331 (1981-12-01), Gyugyi
patent: 4353024 (1982-10-01), Gyugyi
patent: 4489371 (1984-12-01), Kernick
patent: 4555659 (1985-11-01), Gyugyi
Gyugyi et al., "Characteristics of Static Thyristor-Controlled Shunt Compensators . . . ", IEEE, vol. PAS-99, No. 5, 9/10 1980.
Gyugyi et al., "Principles and Applications of Static Thyristor Controlled Shunt Compensators", IEEE, vol. PAS-97, No. 5, 9/10 1978.

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