京南水电站微机发-变组纵差保护系统设计  

Microcomputer-based differential protection of generator-transformerblock of Jingnan Hydroelectric Power Plant

作　　者：林元[1] 张群英[2] 罗延平[3] 

机构地区：[1]广西水利电力勘测设计研究院,广西南宁530023 [2]桂林工学院电子与计算机系,广西桂林541004 [3]桂林电子工业学院机电与交通工程系,广西桂林541004

出　　处：《桂林工学院学报》2003年第4期373-377,共5页Journal of Guilin University of Technology

摘　　要：介绍了京南水电站微机发电机-变压器组纵差保护的设计.其原理是通过比较发电机和/或变压器两侧电流的幅值和相位实现纵差保护,当保护范围内发生故障时流入继电器的电流为两侧短路电流之和,使继电器动作.保护系统由输入输出接口变换器、处理器插件、输出单元和控制面板四部分构成;保护流程分成信号输入、信号控制和处理及信号输出三大步骤;微机保护功能通过软件实现,对两侧电流相位差和不平衡电流按输入参数预先进行处理,转化为两侧平衡电流判据,由差动原理依次判定后,向符合纵差保护动作条件的跳闸矩阵发出跳闸令.The design on microcomputer-based longitudinal differential protection of generator-transformer block in Jingnan Hydroelectric Power Plant is introduced. The principle of longitudinal differential protection is the comparison of current amplitude and phase between the sides of generator and/or transformer. The relay will actuate while there is a fault within the range of protection, due to the relay input current equals to the sum of the short-circuit current from two sides. The protection system is composed of the following four parts: input/output interface converter, processor module, output unit and control panel. The flow of protection includes three steps: signal input, signal control and processing and signal output. The software can realize the functions of microcomputer-based protection in accordance to the sequences listed below. Firstly, the input parameters on behalf of the current phase difference and unbalanced current between the two sides are preprocessed. Secondly, they are transferred as balanced current criteria of the two sides and then are judged successively by the differential principle. Finally, the trip order will be sent out to the trip matrix with the actuation conditions of longitudinal differential protection.

关 键 词：水电站 微机发-变组纵差保护 DRS系统 京南 广西 

分 类 号：TM77[电气工程—电力系统及自动化]