基于直觉梯形模糊数的数字保护可靠性分析郭艺.pdfVIP

第 42 卷 第 12 期 Vol.42 No.12 2014 年6 月 16 日 Power System Protection and Control Jun. 16, 2014 基于直觉梯形模糊数的数字保护可靠性分析 摘要： 关键词： Reliability analysis of digital relay based on intuitionistic trapezoidal fuzzy numbers GUO Yi, Lü Fei-peng, WANG Gang (School of Electrical Engineering and Information, Sichuan University, Chengdu 610065, China) Abstract: The structure and theory of relay protection system in smart substation have changed greatly. How to analyze the reliability of relay systems objectively and properly is an important problem. The information can be divided into three parts and the topology is analyzed rationally by minimal path sets algorithm, then the theory of intuitionistic trapezoidal fuzzy numbers is used to analyze and calculate the fuzzy and uncertain failure probabilities of devices. With the reliability indexes of relay protection system and the software of model, every minimal path can be analyzed by the decision-making method based on intuitionistic trapezoidal fuzzy numbers and the weakness of relay system is identified. This method proposed is proved correct and practical by the sample model. Key words: digital protection; minimal path sets algorithm; intuitionistic trapezoidal fuzzy numbers; reliability 中图分类号： TM77 文献标识码：A 文章编号： 1674-3415(2014)12-0065-06 变化都具有不确定性。考虑其元件的制造水平复杂 0 引言 和影响质量因素很多，它们的正常运行都服从一定 随着 IEC61850 标准的颁布、高速以太网交换 的概率分布，因此基于其随机性定量评估是客观有 技术的快速发展及非常规互感器技术的实用化，智 效的。但是电力系统不