Traditionally, the model for power switching circuits at harmonic frequencies connected to an ac system has been an ideal current source. The magnitudes of the currents at each frequency are derived from the anaiysis of idealized current waveform. The...
Traditionally, the model for power switching circuits at harmonic frequencies connected to an ac system has been an ideal current source. The magnitudes of the currents at each frequency are derived from the anaiysis of idealized current waveform. These currents are injected into the ac system to determine the resonant frequencies and harmonic penetration into the system. A more accurate model for frequency plane analysis is proposed and it is applied to a static VAR compensator(SVC) consisting of a fixed capacitor in parllel with a thyristor controlled reactor(FCTCR).
This model consists of a harmonic voltage source in series with a variable source admittance. The differential equations for the system are first written in order to gain a better insight to the problem. The model is hypothesized and the circuit is analyzed to determine its parameters.
Finally, the results of a model test is shown which verify the accuracy of the model.