Damping and Resonance in a High Power Switching Circuit
نویسندگان
چکیده
Switching circuits with thyristor controlled reactors are used in high power systems for static VAR control and flexible AC transmission. These circuits can exhibit highly nonlinear behavior because the thyristor switch off time depends on the circuit state. This paper shows how to understand and predict damping and resonance in a basic thyristor controlled reactor circuit used for static VAR control. The circuit damping occurs even in the absence of circuit resistance. An analytic formula for the circuit Jacobian is studied to predict resonance effects and a simple test for detecting resonance involving circuit frequencies spanning an integer harmonic is proven to be correct.
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