新型分布式微机母线保护的研究  

STIDU OF NEW DISTRIBUTED BUS PROTECTION OF POWER SYSTEM

作　　者：罗姗姗[1] 贺家李[1] 李永丽[1] 焦彦军[1] 

机构地区：[1]天津大学电力及自动化工程系发电教研室

出　　处：《电力系统及其自动化学报》1995年第4期9-18,共10页Proceedings of the CSU-EPSA

基　　金：博士点基金

摘　　要：针对传统的集中式母线保护原理所存在的缺点，本文提出一种新型的分布式母线保护原理．这种原理是将母线保护分成若干单元分散地装设在母线上所联接的各个回路上，而通过计算机网络将它们联接起来．通过计算机网络每个保护单元可以得到所有回路的电流数值，各保护单元独立地进行母线区内外故障的计算和判断，当判断为母线区内故障时，只将本回路开关断开。这种装置不仅能够根据获取的信息，自动适应母线的结线和运行方式，快速切除各种故障，而且不会发生保护受干扰误动使母线全部停电的事故，因而能极大地提高保护的可靠性。文中介绍了装置的硬件构成及母线保护单元实时通信网络的构成原理和通信方式。In view of the disadvantages of the traditional centralized principle of bus protection this paper proposes a new distributed bus principle based on microprocesors and communication newwork. According to this principle the whole bus protection system is divided into a number of bus protection units installed each on one power circuit connected to the bus. These bus protection units arc connected together by the data communication network, so that each unit obtains the current datum of all the circuits connected to the bus. Every protection unit can complete the bus differential protection calculation and judgment independently. It will trip only its own circuit breaker as soon as it discovers that the fault is on the protected bus section. In this case all the protection units will trip their circuit breakers so that the fault will be cleared. If one of the protection units maloperates owing to the electromagnetic electromagnetic interference failure, only its own circuit breaker will be tripped incorrectly, so that the serious consequence due to maloperation of the traditional bus protection relay will be avoided. It greatly increases the reliability of the protection. On the other hand, each protection unit sends the information not only about the current values but also about the status of the circuit on which it is installed, such as to which one section of the bus system it is connected, the operating condition of its circuit breaker etc. Therefore this type of bus protection can easily adapt to the variable working conditions of the bus system. The principle description, the hardware structure. communication network and the preliminary experimental results are presented.

关 键 词：母线保护 继电保护 电力系统 微机 

分 类 号：TM645.11[电气工程—电力系统及自动化]