Thévenin Equivalent of Voltage-Source Converters for DC Fault Studies

  title={Th{\'e}venin Equivalent of Voltage-Source Converters for DC Fault Studies},
  author={Himanshu J. Bahirat and Hans Kr Hoidalen and Bruce A. Mork},
  journal={IEEE Transactions on Power Delivery},
This paper presents a simple modulation index-dependent Thévenin equivalent circuit model of the voltage-source converters (VSCs) and the associated anti-parallel diode rectifier. The model derivation uses orthogonal transformation and a transformer analogy to transfer impedances to the dc side of the converter. The paper proposes a switched equivalent representation of a three-phase diode rectifier formed due to the antiparallel diodes when VSC switching is inhibited. The proposed model is… CONTINUE READING