摘要随着经济发展，电网规模日益扩大，结构也越来越复杂，发生各类故障的概率也逐渐增大。继电保护作为电网最重要的一道防线，在防止故障扰动方面起着非常重要的作用，其可靠性与电网的正常运行息息相关。因此研究继电保护装置的可靠性成为人们日益关注的课题。7353
在电力系统稳定性评估方面，经常使用故障树法和Markov状态空间法，由于继电保护是可修复系统，所以马尔科夫状态空间法得到了广泛的应用。本论文考虑到继电保护由很多模块组成，故采用基于故障树分析法，使得设计更加优化，并结合Markov状态空间法评估出可用度和失效度，并在此分析的基础上，通过C++编程实现可靠性的便捷计算，同时在此基础上提出一些提高可靠性的方案。
关键词 继电保护 可靠性 故障树法 Markov状态空间法 C++实现
毕业设计说明书（论文）外文摘要
Title The microcomputer relay protection device
reliability analysis and C++ realized
Abstract With economic development, the size of power grid is expanding gradually and the structure becomes more and more complex. So the probability of various faults increases. As the most important line, relay protection plays an important role in preventing fault disturbance. Its reliability and normal operation of grid are closely linked. So people increasingly focus on the subject of researching the reliability of the relay protection device.
In the power system stability assessment, people often use FTA and Markov state space method. Because the relay protection is a repairable system, Markov state space method has been widely used. In this paper, we consider that relay protection consists of many modules, so we choose the way based on FTA to make the design more optimization and combine Markov state space method to estimate the reliability and failure rate. Based on this, we program it to realize the calculation process via C++. What’s more, based on these analyses, we put forward some plans to improve the reliability.
Keywords relay protection reliability FTA Markov state space method C++ realized
目录
1 绪论 1
1.1 课题背景及意义 1
1.2 国内外研究现状 2
1.3 本文主要工作 7
2 微机保护的可靠性指标 9
2.1 常用可靠性指标 9
2.2 微机继电保护装置的可靠性指标建立 9
2.3 本章小结 14
3 可靠性评估方法介绍 15
3.1 电力系统可靠性评估方法概论 15
3.2 故障树法 15
3.3 马尔可夫状态空间法 17
3.4 本章小结 20
4 基于故障树法的微机继电保护装置可靠性分析 22
4.1 概述 22
4.2 保护系统硬件失效因素及模型 22
4.3 保护系统可靠性分析 26
4.4 实例计算及分析 27
4.5 计算过程的C++实现 28
4.6 本章小结 39
5 提高微机保护装置可靠性的一些措施 40
5.1 概述 40
5.2 微机保护装置的干扰来源及抗干扰措施 40
5.3 本章小结 42
总结 43
结论 43
后续研究工作及展望 43
致谢 45 C++微机继电保护装置可靠性分析:http://www.youerw.com/zidonghua/lunwen_5268.html