Summary of Key Technologies for Reliability Evaluation of the HVDC Protection Systems

The HVDC transmission protection system is an important line of defense for the HVDC transmission system, which is directly related to whether the HVDC project can operate safely and steadily. Therefore, it is necessary to evaluate the reliability of the HVDC protection system. Based on the analysis of the extraction of the relay protection reliability evaluation data and the factors affecting the reliability of the relay protection, this paper presents the research status of the reliability evaluation indicators of the HVDC protection systems. Then, the commonly used methods of the HVDC protection reliability evaluation are analyzed, finally, the research points and trends of the HVDC protection reliability evaluation are put forward, and the reliability evaluation methods of the HVDC protection system are summarized.