Comparison of dynamic performance of meshed networks with different types of HVDC lines

The paper presents classical, Line Current Commutated (LCC) based and Voltage Source Converter (VSC) based HVDC line models for system dynamic studies. The models are developed based on the injection modelling principle and incorporated into a meshed four machine, multi-bus network. Small and large disturbance stability studies are performed to identify the sensitivity of electromechanical inter-area oscillatory modes to varying HVDC transmission capacity, converter type and HVDC point of connection. The application of LCC and VSC-HVDC resulted in varied system responses depending on the HVDC technology used and point of connection. In all cases connection of HVDC line was beneficial to overall system dynamic performance.