基于GO法的配电网继电保护系统可靠性研究

发布时间：2018-10-29 12:38

【摘要】：现阶段,电网作为国民经济的主宰者,其可靠性的重要性不言而喻,配电网是电力系统中可靠性波动最大的网络,如何保障其可靠性将是一项艰巨的任务。由于一次回路设备较多,是系统可靠性研究重心所在,可随着二次系统中继电保护设备的增加,继电保护设备的误动或拒动会引起故障连锁反应,故其可靠性也逐渐重要起来,设备故障率也居高不下,然而它的可靠性却很容易被大家所忽视。如今,继电保护装置的可靠性分析还不够成熟,本文突出影响设备的主要因素,采用可靠性建模的方式,使用一种以成功为导向的可靠性分析方法—GO法,应用于淮南金家岭110kV变电站继电保护系统可靠性分析。重点依据淮南当地变电站的实际数据,设计出了继电保护的全过程风险智能评估管理系统,从而提高电网可靠运行的管理水平。本文首先对配电网可靠性评估方法进行概述,通过对几种常用可靠性算法比较,突出GO法可靠性分析优势。本文提出所采用的方法—GO法,首先介绍GO法基本原理,通过算例简介相关操作符特征及运算式,将GO法使用在淮南金家岭110kV变电站继保设备状态可靠性评估实例上,通过收集保护系统运行时设备的原始及基础数据,依据继电保护装置原理图特征画出相应要求的GO模型,通过对模型分析列出计算式,使用收集的数据计算出系统输出结果,显示设备状态情况并评价系统好坏;将往年指标统计数据与计算数据相比较得出GO法在继电保护系统可靠性分析上的可行性和独特性。依据上述所做分析,重点针对传统的继保系统在设备评判及检修上的缺陷,开发出一种继电保护可靠性评估管理系统,使用该软件可以做到实时在线监测,减少对设备完好度判断上的不足所带来的过修及欠修的情形;经过对淮南当地变电站测试表明,软件在分析使用上快捷、方便和有效。因此,可为系统可靠性实际运用带来长久发展,在当地经济发展中发挥重要作用。
[Abstract]:At present, as the master of the national economy, the importance of the reliability of power grid is self-evident. Distribution network is the most fluctuating network in the power system, how to ensure its reliability will be a difficult task. As there are more primary circuit equipments, which is the focus of the system reliability research, with the increase of relay protection equipment in the secondary system, the maloperation or failure of the relay protection equipment will cause a chain reaction of faults, so its reliability is gradually becoming more and more important. Equipment failure rate is also high, but its reliability is easy to be ignored. At present, the reliability analysis of relay protection device is not mature enough. In this paper, the main factors that affect the equipment are highlighted, and the reliability modeling method is adopted, and a successful oriented reliability analysis method, GO method, is used. It is applied to reliability analysis of relay protection system in Jinjialing 110kV substation in Huainan. According to the actual data of Huainan local substation, the whole process risk assessment and management system of relay protection is designed, so as to improve the management level of reliable operation of power network. In this paper, the reliability evaluation methods of distribution network are summarized firstly, and the advantages of GO reliability analysis are highlighted by comparing several commonly used reliability algorithms. In this paper, the GO method is put forward. Firstly, the basic principle of GO method is introduced. The GO method is applied to the reliability evaluation of the relaying equipment of Jinjialing 110kV substation in Huainan through an example. By collecting the original and basic data of the equipment during the operation of the protection system and drawing the corresponding GO model according to the characteristics of the schematic diagram of the relay protection device, the calculation formula is listed through the analysis of the model, and the output results of the system are calculated by using the collected data. Display the status of the equipment and evaluate the quality of the system; The feasibility and uniqueness of GO method in the reliability analysis of relay protection system are obtained by comparing the statistical data of previous years with the calculated data. According to the above analysis, aiming at the defects of the traditional relay protection system in equipment evaluation and maintenance, a relay protection reliability evaluation management system is developed, which can be used for real-time on-line monitoring. Reducing overrepair and underrepair caused by insufficient judgment of equipment integrity; The test of Huainan local substation shows that the software is fast, convenient and effective in analysis and use. Therefore, it can bring long-term development for the practical application of system reliability and play an important role in local economic development.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM77

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