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An Improved Synchronverter based HVDC System Considering Damper Windings Effect

In recent years, the innovative concept of virtual synchronous machine (VSM) has been adopted in the modern control techniques of high voltage direct current (HVDC) technologies, and in particular, the synchronverter. This latter is originally defined as: inverter that mimics the behavior of synchronous generator is able to keep the entire positive and negative proprieties of a real synchronous machine during steady state and transient conditions. In this paper, a novel control strategy which demonstrate how to include damper windings in synchronverter based HVDC system is described, where both rectifier and inverter sides are controlled in similar way to that of synchronous motor (SM) and synchronous generator (SG) respectively. Simulation testes are performed to show the effectiveness of the proposed strategy of control to achieve high stability performance in ACDC power system.