Transient Analysis Modelling of Complex HVDC Networks using Parallel Computing This paper presents a transient analysis modelling of a multiterminal HVDC network using PSCAD EMTDC on a parallel computing grid platform. The different dynamic cases, such as re-dispatch of power flow in DC network, DC network fault clearing with the application of HVDC circuit breakers and the redistribution of power after fault clearing, are simulated. The key considerations are discussed for dividing a complex HVDC network into smaller sub-systems and to run each subsystem simultaneously in a multi-core environment. The subsystems are separated from the other subsystems by transmission lines or cables (t-lines). Finally, a case study is presented to demonstrate the significant gain in simulation speed for simulating a HVDC network using parallel processing against simulating the network on a single machine using serial processing.