Research On Optimization Of Electromechanical Transient Model And Interfaces Model Based On Real-Time Digital Simulation(RTDS)

The HVDC systems and large-scale power electronics devices are increasingly installed in modern power systems. Concerning the limitations of the existing methods which can not meet the current needs of the development of large-scale power system, a novel hybrid simulation of electromechanical transient simulation (TS) and electromagnetic transient simulation (EMT) is of great theoretical value and practical significance. Model based on dynamic equivalent is studied. Based on the established hybrid simulation platform on Real-Time Digital Simulation (RTDS), a feasible and effective method is proposed to expanding the size of electromechanical transient in the hybrid real-time simulation in order to meet the needs of rapid development of large-scale AC system. also the method of improving simulation accuracy is proposed through the reseach of interface's models. This dissertation's main contents include:(1) IEEE 14 bus system simulation experiment was calculated by the established TS module on RTDS/CBuilder, then a hybrid simulation was developed in the condition that the electromagnetic transient part is an actual DC system; (2) through the study of the theory and methods of dynamic equivalence, a method based on dynamic equivalent is proposed to expanding the size of the AC system scale in the electromechanical transient simulation; (3) Some useful guidance for the interface location selection is summarized for reference; (4) The interface was optimized-modeled and an example of a simple system proved the effectiveness of the optimizing method.