智能变电站二次设备状态评估模型及其应用的研究

发布时间：2018-01-27 15:17

本文关键词： 状态评价模糊综合评判智能变电站二次设备　出处：《华北电力大学》2015年硕士论文　论文类型：学位论文

【摘要】：目前电网正在向坚强智能电网的方向发展。随着大量新建智能变电站的投入运行,智能二次设备的数量急剧增加。智能二次设备与常规二次设备存在着较大的差异,其状态评价系统也应做出调整来适应这种差异。本文主要研究智能二次设备的状态评估方法及其应用。首先梳理了电力设备检修体制的发展过程,分析状态检修和定期检修的不同,阐述继电保护设备状态检修的必要性、可行性和优越性,总结了继电保护装置进行状态检修的关键技术。其次,介绍智能变电站的体系结构,分析了在IEC61850标准规约基础上的智能变电站二次设备状态监测和智能化装置自检技术,阐述继电保护二次回路物理链路和逻辑链路的在线监测原理和实施方式,设计出220kV长风智能变电站继电保护在线监测系统及实施流程,总结提炼出具体的可操作的在线监测信息用于状态评估。最后将模糊数学理论引入到智能变电站二次设备状态评价中,基于模糊综合评判思想,利用专家估测法和层次分析法为多层次的众多评判因素建立权重集,根据评判因素的特性构造适当的模糊分布函数计算出模糊关系矩阵,对模糊合成运算的算子做了适当改进,根据最大隶属原则对模糊综合评判结果向量进行分析,并将分析结果进行了百分制数量化,从而清析直观的呈现给状态检修决策者。通过对长风智能变电站继电保护设备运行状态的实际评估,证明该评判方法是合理有效的。在智能二次设备状态评估中引入模糊数学理论,很好的发挥了智能设备在线监测的优势,把人们对智能设备的定性判断转换成计算机能识别的精确语言,实现对智能设备运行状态的定量分析,对电力企业施实标准化、规范化管理具有重要的意义。
[Abstract]:At present, the power grid is developing towards the direction of strong smart grid. With a large number of new intelligent substation put into operation. The number of intelligent secondary equipment has increased dramatically. There is a great difference between intelligent secondary equipment and conventional secondary equipment. The state evaluation system should also be adjusted to adapt to this difference. This paper mainly studies the status assessment method and its application of intelligent secondary equipment. Firstly, the development process of power equipment maintenance system is analyzed. This paper analyzes the difference between condition maintenance and periodic maintenance, expounds the necessity, feasibility and superiority of condition maintenance of relay protection equipment, and summarizes the key technology of condition maintenance of relay protection device. Secondly. This paper introduces the architecture of intelligent substation, and analyzes the secondary equipment condition monitoring and intelligent device self-checking technology based on IEC61850 standard. The on-line monitoring principle and implementation mode of physical link and logical link in secondary circuit of relay protection are described. The on-line monitoring system and implementation flow of relay protection for 220 kV Changfeng intelligent substation are designed. Finally, the fuzzy mathematics theory is introduced into the secondary equipment condition evaluation of intelligent substation, based on the fuzzy comprehensive evaluation idea. The expert estimation method and the analytic hierarchy process (AHP) are used to establish the weight set for the multi-level evaluation factors, and the fuzzy relation matrix is calculated according to the characteristics of the evaluation factors. Based on the principle of maximum membership, the fuzzy synthetic evaluation result vector is analyzed, and the analysis results are quantified by the percentile system. Through the analysis of the situation maintenance decision makers, through the Changfeng intelligent substation relay protection equipment operation status of the actual evaluation. It is proved that the evaluation method is reasonable and effective. The fuzzy mathematics theory is introduced into the state evaluation of intelligent secondary equipment, and the advantage of on-line monitoring of intelligent equipment is well brought into play. It is of great significance to convert the qualitative judgment of intelligent equipment into an accurate language that can be recognized by computer, to realize the quantitative analysis of the running state of intelligent equipment and to standardize and standardize the operation of electric power enterprises.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM76;TM63

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