The Modeling and Simulation of HVDC Protection System Based on PSCAD/EMTDC

When a fault occurs,HVDC(High Voltage Direct Current) operators can only get the final acting information of the protection system,which is just a black box to the operators.This situation is obviously not conducive to HVDC protection setting calculating,sensitivity analyzing,protection configuring etc.In order to solve this problem,selecting a proper simulation environment and establish the simulation model of the protection system to get the inner information is of momentous significance.This paper comprehensively analyzes the method and key points of HVDC protection modeling in PACAD/EMTDC,and gives out the read-in method of fault recorded data to the established model.At last,an HVDC protection misoperating event is analyszed utilizing the protection model.Relevant reults afford a basis to the protection algorithm improvement.