Research on Real-time Reliability of Relay Protection System in Intelligent Substation

Because the intelligent substation is composed of a variety of intelligent electronic components, various types of information data will be generated during its operation. With the continuous implementation and rapid development of smart grid construction, the application of smart substations in power systems is becoming more and more extensive, and the number and scope of use are gradually expanding. In the face of the substantial increase in the commissioning of smart substations, people are paying more attention to the reliability of relay protection devices in smart substations during use. Strengthening research on the relay protection system of intelligent substations and improving the reliability of the system are urgent problems that need to be solved. The digitization of data information of the whole station is a typical feature of intelligent substations, on this basis, distributed relay protection can be realized; At the same time, the system-level status information can be identified and evaluated. Because there are too many spatial states, the calculation is very complicated. To solve this problem, this paper proposes to calculate the reliability of the relay protection device by Markov method, and then calculate in system level by GO method. Combining the Markov algorithm model with the GO method, the reliability of the relay protection system is calculated and analyzed, enabling the on-site operation and maintenance personnel to grasp the basic status of the relay protection device and the system operation in real time, obtain real-time feedback information, and better relay protection work of smart substations.