面向电力系统的继电保护故障建模研究

针对数字式继电保护系统,提出了一种基于故障维修和保护功能的单主保护和双主保护系统的隐式马尔可夫可靠性模型,该模型基于状态检修(CBM)环境和可靠性指标计算了保护系统隐藏故障状态的概率。分析了不同参数(含人为误差的影响)对隐藏故障状态概率的影响,采用可变参数法提高了可靠性的最优措施。与单主保护相比,双主保护系统具有更高的隐藏故障概率,从而降低了实际的良好状态概率,同时提高了两个主保护的可靠性,实现了整个继电保护系统的简化配置。通过对数字保护系统中的在线自校验和监控系统的进行改进,CBM的实际应用可以降低隐藏故障状态概率,这对保护系统的可靠性设计具有一定的参考价值。

Research on Fault Modeling of Relay Protection for Power System

Aiming at the digital relay protection system,a hidden Markov reliability model of single-main protection and double-main protection system is proposed based on fault maintenance and protection.The model is based on the condition-based maintenance (CBM) environment and reliability.The sex index calculates the probability that the protection system hides the fault condition.The influence of different parameters (including the influence of human error) on the probability of hiding the fault state is analyzed,and the variable parameter method is used to improve the optimal measure of reliability.Compared with single-master protection,the double-master protection system has a higher probability of hidden failures,which reduces the probability of an actual good state.At the same time,the reliability of the two main protections is improved,and a simplified configuration of the entire relay protection system is realized.Through the improvement of the online self-check and monitoring system in the digital protection system,the practical application of CBM can reduce the probability of hiding the fault state,which has certain reference value for the reliability design of the protection system.