This model implements an HVDC solid-state transformer composed of an H-bridge IGBT inverter and H-bridge diode rectifier. The model requires the SSN iterative switches (iSWITCH) to correctly simulate this circuit because of state dependances between the inverter and rectifier parts.
References
[1] C. Dufour, J. Mahseredjian , J. Belanger, "A Combined State-Space Nodal Method for the Simulation of Power System Transients", IEEE Transactions on Power Delivery, Vol. 26, no. 2, April 2011 (ISSN 0885-8977), pp. 928-935
[2] P. Monjean, J. Delanoe, D. Marin, J. Auguste, C. Saudemont, B.Robyns, "Control Strategies of DC-Based Offshore Wind Farm", EPE'11, September 2011, Birmingham, England