Research On The Reliability Design For Microprocessor-Based Protection's Hardware Platform

As the structure of power system is more and more complex, the higher reliability of the relay equipment is required. Another more, the competition of market is more and more fierce. Therefor, the research and design of high reliable microprocessor-based protection equipment becomes an important task for the design of relay protection.The thesis takes the research on design for the reliable microprocessor-based protection equipment using the technology of fault-tolerance and fault-avoidance. The thesis concretely discusses the design from three aspects. Because of the redundancy structure could enshroud the effect of the protection equipment's failure, this thesis designs high reliability structure of the microprocessor-based protection equipment applying for different situation. Otherwise, the hardware's failure could be discovered by the self-checking of the microprocessor-based protection equipment, avoiding the occurrence of the mal-action. This thesis analyzes and designs the self-checking of the microprocessor-based protection equipment from built-in monitoring and time-lapse self-checking, and analyzes the influence of the time-lapse self-checking using Markov model which can be used to examine the built-in monitoring and time-lapse self-checking features;educes the optimal interval in microprocessor-based protection equipment;compares the influences of reliability between built-in monitoring and time-lapse self-checking for the microprocessor-based protection equipment simultaneity. Avoiding the influence of electromagnetic disturbance, we should take some measures. At the basis of analyzing the electromagnetic environment and the theory of disturbance, the thesis takes the design of the anti-jamming. At last, contraposing the measures of enhancing reliability of the microprocessor-based protection equipment, the thesis analyses the impact that the design measures for the microprocessor-based protection equipment. The optimization of the design is analyzed from the point of view of economy, and these have certain reference meanings to the researchand development of new microprocessor-based protection equipment.