VSC-HVDC system robust stability analysis based on a modified mixed small gain and passivity theorem

@inproceedings{Song2017VSCHVDCSR,
  title={VSC-HVDC system robust stability analysis based on a modified mixed small gain and passivity theorem},
  author={Yujiao Song and Claes Breitholtz},
  year={2017}
}
In a VSC-HVDC system, when the input power to the converter is controlled to a positive constant, the converter acts a differential negative resistance −P0/i0^2, which may cause instability in case of a connected weak AC-grid. In order to analyze the robust stability of such a system, a modified mixed small gain and passivity theorem is proposed, which shows that the negative feedback interconnection of two linear time invariant stable subsystems (converter admittance and AC-grid impedance) is… CONTINUE READING