Fig. 1. Simplified diagram of power supply system

Fig. 2. Phase current waveform of valve-side of converter transformer with the firing angle α

Fig. 3. Equivalent circuit of synchronous phase shifting for converter

Fig. 4. Phasor diagram of converter system

Fig. 5. Relation between maximum output voltage V_dmax and short circuit impedance u_k of transform

Fig. 6. Equivalent circuit of transferring from V₅ to V₁

Fig. 7. A-phase current waveform of three phase bridge converter

Fig. 8. Relation between harmonic current and short circuit impedance u_k of transform

Fig. 9. Short-circuit fault diagram of converter

Fig. 10. Relationship curve between Q_S, PF and u_k