电力综合自动化系统与变电站继电保护研究

发布时间：2019-03-16 09:49

【摘要】：变电站的综自系统(综合自动化系统)是利用自动化系统、计算机技术、信息处理技术和通信技术等高科技对变电站的继电保护、测量、控制、故障滤波、信号处理、运动装置和自动装置等二次设备功能进行优化组合,实现对变电站的所有设备运行情况的测量和控制。继电保护是指当电力系统发生故障或异常工况时,继电器在可能实现实现的最短时间和最小区域内,自动将故障设备从系统中切除,或发出信号由值班人员消除异常工况根源,以减轻或避免设备的损坏和对相邻地区供电的影响。继电保护是变电站综合自动化系统的重要组成部分,研究继电保护对变电站综合自动化系统的安全稳定运行具有重要意义。本文首先分析了传统变电站的缺点及目前变电站综自系统在可靠性、安全性、自动化管理的优势,对变电站综自系统和继电保护技术在国内外的发展过程进行简单的论述。然后在研究相关变电站综自系统的技术资料的基础上,分析了变电站的综自系统主要结构形式,同时详细解剖了微机保护的软件和硬件的结构形式,并对主要的软件程序和硬件电路进行分析介绍,对微机保护进行常用保护算法分析,综合评估每种算法的特征。分析了变电站综自系统的几种主要的继电保护形式,从过激保护、母线差动保护、主变压器差动保护和非电量保护方面分析了每种继电保护的原理。最后结合杭州市萧山区220kV瓜沥变电站综合自动化改造案例,提出了变电站综合自动化系统继电保护的方案设计,包括变压器保护和线路保护功能的实现,并研究了该保护方案的硬件系统设计和软件程序框图。变电站改造实施和验收结果表明基于该设计方案的变电站改造对于变电站继电保护的改善具有明显效果。
[Abstract]:The integrated automation system of substation is the relay protection, measurement, control, obstacle filtering, signal processing, and so on, which use automation system, computer technology, information processing technology and communication technology to relay protection, measurement, control, and so on. The function of the secondary equipment, such as motion device and automatic device, is optimized to measure and control the operation of all the equipments in the substation. Relay protection refers to the automatic removal of the faulty equipment from the system or the sending of signals by the duty personnel to eliminate the root causes of abnormal working conditions in the shortest possible time and minimum area when the power system fails or abnormal working conditions occur, and the relay protection means that the relay will automatically remove the fault equipment from the system in the shortest possible time and minimum area. In order to mitigate or avoid damage to the equipment and the impact of electricity supply to adjacent areas. Relay protection is an important part of substation integrated automation system. It is of great significance to study relay protection for the safe and stable operation of substation integrated automation system. In this paper, the disadvantages of traditional substation and the advantages of reliability, safety and automation management of substation integrated self-control system are analyzed, and the development process of substation integrated self-control system and relay protection technology at home and abroad is simply discussed. Then, on the basis of studying the technical data of substation integrated self-control system, the main structure forms of substation integrated self-control system are analyzed, and the software and hardware structure of microcomputer protection are dissected in detail. The main software programs and hardware circuits are analyzed and introduced. The common protection algorithms of microcomputer protection are analyzed and the characteristics of each algorithm are comprehensively evaluated. This paper analyzes several main relay protection forms of substation integrated automation system, and analyzes the principle of each relay protection from the aspects of over-excitation protection, bus-bar differential protection, main transformer differential protection and non-electric protection. Finally, combined with the case of comprehensive automation transformation of 220kV Guali substation in Xiaoshan District of Hangzhou City, this paper puts forward the scheme design of relay protection in substation integrated automation system, including the realization of transformer protection and line protection function. The hardware system design and software program block diagram of the protection scheme are also studied. The results of substation retrofit implementation and acceptance show that the substation retrofit based on this design scheme has obvious effect on the improvement of substation relay protection.
【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;TM77

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