Simulation recurrence of a realistic DC line fault based on RTDS and its simulation reliability analysis

In this paper, the equivalent model of a local HVDC transmission system is set up based on Real-Time Digital Simulator (RTDS). A realistic DC line fault on the pole 2 of the HVDC project is simulated successfully by use of the RTDS model connected with actual physical control and protection devices. And then, a complete evaluation theory of simulation errors is proposed. In the theory, residuals similarity is used to characterize the global error of dynamic simulation, and frequency, damping and amplitude similarity are used to characterize features errors respectively. The comparison analysis has been carried out between the simulation results and the fault recordings by the simulation similarity computation procedure based on LabVIEW. It is proved that the simulation results of existing models are almost the same as the fault recordings, and the simulation model of HVDC transmission system established can reflect operation characteristics of real network exactly. The realistic faults can be reproduced by the simulation experiment accurately.