继电保护评估指标体系及多维度评估研究

发布时间：2018-05-29 01:42

本文选题：继电保护 + 指标体系　；参考：《华北电力大学(北京)》2017年硕士论文

【摘要】：在我国电网西电东送、南北互供、大电网互联的发展战略下,特高压交直流大功率输送方式将成为新常态,交直流混联电网日趋复杂,各区域电网之间联系加强,区域之间电气联系紧密。复杂互联的网架结构和交直流混联的电网给人们带来巨大便利的同时,也给电网的运行、维护带来了巨大挑战。继电保护系统作为电力系统的第一道防线,对其进行评估研究工作至关重要。本文研究了继电保护评估指标体系及多维度评估分析,其主要工作如下:(1)建立继电保护评估指标库,并完成评估指标的分类;整理汇总了当前存在于继电保护评估中的不同指标,对指标的内涵和外延进行了研究。收集整理各类继电保护评估指标,形成指标库。基于保护运行的各类影响因素,从元件、系统等物理结构方面对所有评价指标进行总结和分类研究。(2)完成对继电保护评估指标体系的划分;建立一套从不同维度出发的继电保护评估指标体系,从系统运行需求、设备功能、检修因素、测试性、经济性、安全风险等角度出发,建立可靠性、维修性、测试性、保障性、安全性这样五个狭义的指标维度,这五个维度包含的指标具有相对独立性。(3)完成对继电保护复合型评估指标体系的划分;复合型指标体系的建立主要关注这些分类不明确、涵义丰富、相关定义交叉、指标相耦合和工程应用广泛的指标,提出占优型这一划分特征,即在复合型指标范畴内划分为可靠性占优型指标、维修性占优型指标、保障性占优型指标、安全性占优型指标和其他复合型指标。(4)基于建立的继电保护评估指标体系,完成多维度评估分析,给出整体评估继电保护的方法;首先结合工程实际选取具有典型意义的底层指标,其次利用改进熵值法、G1法等赋权方法为这些底层指标在各自维度下赋权,最后确定典型底层指标的标准值,结合某地区电网保护实际数据,将当前这批指标的实测值转化为评分值,再结合典型指标赋权的结果计算这一维度下的评分。综合得到的各自维度下的评估分值,构建具有全面评估意义的雷达图评估结果。
[Abstract]:Under the development strategy of power transmission from west to east, power supply from north to south, and interconnection of large power grids, UHV AC / DC high-power transmission mode will become the new normal, the hybrid AC / DC power grid is becoming more and more complex, and the connection between various regional power grids is strengthened. There is a close electrical connection between the regions. The complex interconnected grid structure and AC / DC hybrid grid bring great convenience to people, but also bring great challenges to the operation and maintenance of power grid. As the first line of defense of power system, it is very important to evaluate and study relay protection system. This paper studies the relay protection evaluation index system and multi-dimensional evaluation analysis, the main work is as follows: 1) establish the relay protection evaluation index database, and complete the classification of evaluation indicators; The different indexes existing in relay protection evaluation are summarized, and the connotation and extension of the indicators are studied. Collect and sort out all kinds of relay protection evaluation index, form index database. Based on the various factors affecting the operation of protection, this paper summarizes and classifies all the evaluation indexes from the physical structure of components and systems) and completes the division of the evaluation index system of relay protection. Set up a set of relay protection evaluation index system from different dimensions, from the system operation requirements, equipment functions, maintenance factors, testing, economy, safety risks and other angles to establish reliability, maintainability, testing, support, etc. Security is such a narrow index dimension, the five dimensions contain the index with relative independence. 3) complete the division of the composite evaluation index system of relay protection, the establishment of the composite index system mainly concerns about these categories are not clear, Based on the rich meanings, cross-related definitions, coupling indexes and widely used indexes in engineering, the dominant type is proposed, which is divided into reliability dominant index and maintainability dominant type index in the composite index category. Based on the established evaluation index system of relay protection, the multi-dimensional evaluation analysis is completed, and the method of overall evaluation of relay protection is given. First of all, combined with the engineering practice, select the typical bottom indicators, and then use the improved entropy method and G1 method to weight these bottom indicators under their respective dimensions, and finally determine the standard value of the typical bottom indicators. Combined with the actual data of power network protection in a certain area, the actual values of the current batch of indexes are converted into the scoring values, and then the scores under this dimension are calculated by combining the results of the typical indicators' weights. By synthesizing the evaluation scores of each dimension, the evaluation results of radar images with comprehensive evaluation significance are constructed.
【学位授予单位】：华北电力大学(北京)
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM77

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