地区电网继电保护整定计算若干问题研究

华中科技大学

硕士学位论文

地区电网继电保护整定计算若干问题研究

姓名：张央

申请学位级别：硕士

专业：电力系统及其自动化

指导教师：陈金富；段献忠

20070201

华中科技大学硕士学位论文

摘要

整定计算是保障电网安全运行的基础性工作，是继电保护装置及时切除故障，避免恶性事故发生的保证，

其研究具有巨大的经济效益和社会效益。合理的整定计算对提高保护运行的性能具有重要作用，保护装置的快速、准确动作要靠整定计算获得精准合理的定值来保证。本文针对地区电网继电保护整定计算的特点和要求，结合地区电网继电保护整定计算软件开发中出现的一些具体问题进行了研究，内容涉及整定计算理论研究、整定计算自动化技术和定值校核系统的设计。

首先，在整定计算理论方面，本文结合地区电网的特点，分析了地区电网的主要保护形式，介绍了零序电流保护和接地距离保护的计算原则，并详尽的阐述了线路互感对零序电流保护计算的影响、零序电流保护的不足、基于感受量的接地距离保护的优点及两种特殊接线方式（T接线和长短线配合）的整定计算问题。

其次，在整定计算自动化技术方面，分析了地区电网运行方式的特点，对整定计算中查找不到极端运行方式和多次重复开断同一条线路这两个问题进行了讨论，并对确定极端运行方式的电流分布系数法、扰动域法和紧邻集法进行了研究，对提高计算机整定计算效率有指导意义。

最后，文章介绍了定值校核系统的研制，对定值校核系统的结构、校核的规则、工作模式和计算流程进行了介绍，并对定值校核中的保护范围快速求取和在线校核数据的获取这两个问题进行了研究。

关键词：继电保护整定计算运行方式定值校核

华中科技大学硕士学位论文

Abstract

Relay setting coordination is the basis of secure operation of power grids, it is the guarantee for relay device to isolate faults from the grids in time and to avoid the occurrence of fatal accidents, so its research is of tremendous economic and social benefits. Reasonable setting calculation plays an important role to improve the operating performance of the protection device. The accurate and reasonable calculation is the guarantee for the quick, accurate and reliable action of the protection device. According to the characteristics and special requirement of protective relaying setting in district power network, combining with the specific issues in the software development, this paper present coordination theory research, coordination automation technology and the settings verification system.

First, in aspect of the setting theory, considering the characteristics of regional power grids, this paper analyses the main forms of the protection of district power grids, present the calculation principle of zero-sequence current protection , grounding distance protection, and some other content, such as the influence of line mutual inductance to the zero-sequence current protection calculation, the abuses impact of zero-sequence current protection, the merits of detective impedance method, the setting of two special kinds connecting lines, and so on.

Secondly, in aspect of relay coordination automation technology, this paper analyses the characteristics of the operation mode of the district power grids, and two problems in searching for the operation mode are pointed out: (1) failure for searching for the unfavourable mode; (2) repeating the same line breaking when searching. The methods to solve these problems are proposed which are based on the current distribution coefficient, the disturbance area and the close degree. This part of research content has guiding significance to improve the efficiency to the computer setting.

Finally, the settings verification system is present. The verification structure, principle,

华中科技大学硕士学位论文

operation mode of the system and the calculation process are proposed. At last two problems are studied: (1) the arithmetic of quickly attaining protection range based on node impedance matrix; (2) obtaining methods of on-line data for setting verification.

Key words:Relay protection Setting calculation Operation mode

Settings verification

独创性声明

本人声明所呈交的学位论文是我个人在导师指导下进行的研究工

作及取得的研究成果。尽我所知，除文中已经标明引用的内容外，本论文不包含任何其他个人或集体已经发表或撰写过的研究成果。对本文的研究做出贡献的个人和集体，均已在文中以明确方式标明。本人完全意识到本声明的法律结果由本人承担。

学位论文作者签名：

日期：年月日

学位论文版权使用授权书

本学位论文作者完全了解学校有关保留、使用学位论文的规定，即：学校有权保留并向国家有关部门或机构送交论文的复印件和电子版，允许论文被查阅和借阅。本人授权华中科技大学可以将本学位论文的全部或部分内容编入有关数据库进行检索，可以采用影印、缩印或扫描等复制手段保存和汇编本学位论文。

本论文属于（请在以上方框内打“√”）学位论文作者签名：

指导教师签名：日期：年月日

日期：年月日