Research And Development Of The Experimental Device Of The Complex Synchronization System Based On VSC-HVDC

Synchronization operation is very important operation in the power grid,if the operation of the synchronization process is improper,it will have a larger impact on the system,which will cause the relay protection device tripping,resulting in a parallel failure.The fast,accurate and reliable synchronization of power grid is of great significance to the stability of power system.Therefore,it is of great significance to study the synchronization of the power grid.Based on the achievements in transmission power of the grid synchronization theory,the experimental device of the VSC-HVDC based grid synchronization complex system is developed in this paper.For the grid synchronization complex system can convert idle voltage source converter into SSSC through the switching operation,the model is constructed in PSCAD,and the feasibility of this function is verified by simulation.After a detailed analysis for control strategy and algorithm of the experimental device based grid synchronization complex system,completing the signal acquisition circuit and IGBT drive circuit,and making a selection of equipment in the experimental device such as DC capacitor and AC filter.Then,making a prototype of the experimental device of the VSC-HVDC based grid synchronization complex system,achieving generation of pulse signal and acquisition of voltage and current signal in CCS programming environment by programming,finally,makingexperiment and debugging in prototype of experimental device,the results of experiment verify the correctness of the function of the complex experimental device.