Study on Fault Diagnosis Technologies of HVDC Light System
نویسنده
چکیده
Because of high reliability and other characteristics, High Voltage Direct Current (HVDC) Light system had important applications in power transmission system. In order to ensure its operation safety, the fault diagnosis technologies based on observer were researched. The model of HVDC light system was introduced, and the types and characteristics of the system were analyzed. Several common fault diagnosis methods were discusses, including method based on analytical model, method based on expert system and method based on neural network. A fault diagnosis observer was designed, the output waveforms of observer were observed and analyzed when the failure occurred, the type of fault was determined, and finally, the automatic detection of fault in HVDC system was achieved. The test simulation results showed that this method detected the occurrence of failures, identified the faults in characteristics and provided evidence for exclusion and maintenance of fault.
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