EMTP modelling of CIGRE benchmark based HVDC transmission system operating with weak AC systems

An EMTP based study of a CIGRE benchmark based HVDC system operating with weak AC systems is carried out. The modelled system provides a starting point for (a) educators teaching HVDC transmission courses, and (b) for utility planners to develop their own low-cost dedicated digital simulators for training purposes. In this paper, modelling details of the AC-DC system, DC converters and controls are presented. To validate the control schemes presented, the HVDC system is tested under AC-DC fault conditions. Results obtained from an EMTP-based study under these fault conditions are also presented in this paper.