Research on Fault Diagnosis of Fieldbus State in Converter Station

Fieldbus (Profibus) systems are widely used in HVDC transmission projects. By monitoring the bus station activity status and bus electrical signal quality, it is possible to grasp the health status of the bus network, perform early identification and troubleshooting existing faults and potential problems, and deal with them in time to prevent the accumulation and further development of bus fault anomalies. The research on the typical fault of the Profibus is carried out in a targeted manner, and the method of troubleshooting the fault point and fault type under the field Profibus fault condition of the converter station is summarized. Through the longitudinal fault diagnosis research of the converter station, the field bus system of the high-end group control system 1 of the Sennan converter station is taken as the simulation object, and the faults of different types of fieldbus faults are diagnosed. the data interaction of the converter station control system is mastered, so that the status of each station device on the bus can be assisted at the data level, and the converter station control system can be directly grasped.