State assessment of protective devices based on data of information processing system

At present, the evaluation of relay status maintenance depends on a large amount of manpower. However, the data sources of relay protection devices and fault recorder information system (as known as the information processing system) have reached the basic requirements of online prediction of status evaluation of protection devices. Taking the exported information as the data source, according to the configuration file information, the state-space information that can be monitored by the protection device can be automatically extracted, and then the automatic extraction of the historical state of the protection device and the calculation of the coefficient of the state-transfer matrix are completed. Using Markov state space model method, the probability of each state that can be monitored by protection device was calculated, and the state of protection is evaluated. Finally, the operation data of CSC-101B protection device are selected as an example. The correctness and effectiveness of the method for evaluating the state of the protective device are verified.