Power connection technology for full-digital real-time simulation and analog simulator

The study of UHVAC/UHVDC hybrid power grid demands various means in every stage, such as in planning, designing, building and operating. Full-digital real-time simulator has the merits such as very large simulation scale and very easy modified model. And analog HVDC simulator has the merits such as reliable and precision simulation results. To bring the merits of these two simulators into play, a power connection technology for combining them is developed, which is developed by distributed parameters transmission line model. Using this power connection technology, a hybrid simulation model for a simple AC/DC hybrid power grid is set up. Results of load flow, start-up and fault test show that this power connection technology is precision, stable and practical, thus it suits to realtime simulation for parallel operation of AC/DC hybrid power grid.