高压输电线路电流纵差保护装置的研究
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摘要
由于电流差动保护具有灵敏度高、简单可靠和动作速度快等显著优
    点,随着电力通信系统的快速发展,它将越来越多地被用作电力系统
    高压、超高压输电线路的主保护;因而数字式分相电流差动保护装置,
    亦成为国内外各继电保护研究机构和生产厂家竞相研制的重点。本课
    题就是针对这一研究方向,结合最新的数字式继电保护技术和数字通
    信技术,研究开发了CSL103型数字式高压线路分相电流差动保护装
    置。本文的内容主要包括以下几个方面:
    1.本文不仅是就电流差动保护的原理,更结合了我国继电保护现有的
     实际问题以及电力通信的发展现状和趋势,综述了本课题的研究意
     义;然后,在综述了国内外的数字式高压线路分相电流差动保护的
     现状之后,提出了本文研究的主要内容。
    2.本文提出了数字式高压线路分相电流差动保护装置通信接口的整体
     设计思想与方案;在分析研究现有的电流采样同步方法以及电力通
     信系统的发展前瞻的基础上,提出了新的电流采样同步方案;在研
     究了高压输电线路纵差保护装置的通信出错的特点和纠错的意义之
     后,提出通信报文的实时纠错思想,并推出了可用于保护装置的汉
     明码纠错方法;根据实际的运行需要,设计出实时监视保护通信通
     道的通信质量的方法;研究了CSL103型保护装置的通信同步时钟
     方案。
    3.本文提出了纵差保护装置硬件的设计原则。根据这一设计原则和本
     文提出的纵差保护通信的整体方案,在分析和试验比较了几种方案
     之后,完成了纵差保护的硬件设计。
    4.本文对目前国内外主要采用的几种判据进行了介绍,针对高压输电
     线路纵差保护装置的保护判据已较为成熟的情况,本文所作的研究
     工作主要是在分析研究现有的各保护判据之后,开发研制CSL103
    
    
     华北电力大学博士学位论文 摘 要
     型保护装置的软件。同时考虑到保护装置的实际运行,研究工作主
     要注重保护判据的实用化。
     5.仿真和动模试验的结果表明,CSLI 03型电流差动保护装置在各种
     故障条件下,均动作正确,各项指标满足高压、超高压输电线路的
     主保护的运行要求。样机己投入现场试运行,可以期望它将成为我
     国高压、超高压输电线路的又一种主保护。
Due to the advantage of high sensitivity, simpleness, trustiness, and
     speediness, the current differential protection will be used as the main
     protection of high-voltage & exceed high-voltage power transmission
     lines more and more, with communication system of electric power fast
     developing. And on digital phase segregated current differential
     protection becomes the researching emphasis by domestic and alien
     protection's research organizations and manufactory companies.
     Aiming at this direction, the research of this paper is to design typed
     CSL1 03 digital phase segregated current differential protection for high-
     voltage & exceed high-voltage power transmission lines, using the
     newest digital protection technology and digital communication
     technology. The mainly contents of this paper are:
     1. The significance of the topic of this paper is summarized, It is not
     only based on the principle of current differential protection but
     also combined the real problem of protection of our country and
     the developing reality & trend of electric communication in China.
     2. The main design idea & schemes of communication interface of
     digital phase segregated current differential protection for high-
     voltage & exceed high-voltage power transmission lines is
     introduced in this paper. Based on analyzing the existed
     synchronization of current sampling and to forecast the develop
     trend of electric power communication system, the new
     synchronization of current sampling is presented. After studying
     the characteristics of communication error and the necessary of
     correcting communication error of current differential protection for
     high-voltage & exceed high-voltage power transmission lines, the
    
    
    
    
    
     idea of correcting communication error while running is proposed.
     And the method of correcting communication error with hamming
     code for this protection is produced. With meeting real serving, the
     channel supervising communication quality is designed. The
     schemes of synchronization clock of communication have been
     studied in this paper.
     3. The fundamentals of the hardware design of digital current
     differential protection are presented. And the main schemes of
     communication of the current differential protection are produced
     in this paper. After several schemes are analyzed, tested and
     compared with, the hardware design of the current differential
     protection has been finished.
     4. The several exited current differential protection criterions have
     been introduced. The study of this paper is mainly designing the
     software of typed CSL1O3 digital phase segregated current
     differential protection. And aiming at the serve of the protection,
     the research work has been paid attention to realization of the
     criterion of typed CSL1O3 digital phase segregated current
     differential protection.
     5. After some simulating experiments, the results indicate that typed
     CSL1O3 digital phase segregated current differential protection
     can correctly serve with any kind of power system fault. It can
     meet the request of main protection of high-voltage & exceed
     high-voltage power transmission lines. The sample protection has
     been to served successfully on a 220kv transmission line. It can
     be expected that the typed CSL1O3 digital phase segregated
     current differential protection will be a new best main protection for
     high-voltage & exceed high-voltage p
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