110KV线路微机距离保护系统设计

论文编号:ZD307  论文字数:17410,页数:56 

摘 要
 110KV线路微机距离保护是通过微机保护装置来实现对输电线路的监控，微机保护装置包括数据采集系统、CPU主系统、开关量输入/输出回路、跳闸出口电路及逻辑电路。其中CPU主系统包含微处理器、存储器及相映接口。通过模数转换器ADC将信号传送给CPU主系统，然后由主系统判断线路是否发生故障。如有故障，CPU主系统发出跳闸命令，使110KV输电线路的安全运行得到保障。此外，说明了三段距离保护的工作原理，对三段相间距离保护参数进行了计算及动作值整定和三段接地距离保护参数计算及动作值整定。验证了110KV微机距离保护的三段式距离保护。还设计了系统工作的流程图及相关流程图工作原理的说明，其中主程序包括初始化和自检两个主要部分使主程序能更好的配合中断程序和故障程序，编写了相关距离保护的主程序、距离保护中断服务程序设计、距离保护故障处理程序设计。通过微机保护装置的设计、三段距离保护的计算和相关程序的设计使整个系统有机的结合起来，实现了110KV线路微机距离保护。
 关键词：距离保护；三段相间距离保护参数计算；数据采集系统；中断服务程序
 
 
Abstract
110KV lines from the computer through the protection of computer protection equipment to achieve the monitoring of transmission lines, computer protection equipment, including data collection system, CPU main system, switching of input / output circuit, tripping circuit exports and logic circuits. CPU main system which includes microprocessors, memory and Xiangying interface. By ADC ADC signal sent to the main system CPU, and then from the main system judge whether a fault line. If there is fault, CPU tripping the main system issued an order, the 110 KV transmission lines to the safe operation of protection. In addition, three of the distance that the protection of the working principle, the three-phase distance protection parameters were calculated and determined action of the whole earth and three from the protection of parameters and action of the entire set. Computer verification of the 110 KV from the protection of the Three-stage distance protection. Also designed the system work flow chart and related flow chart of the principle that one main program, including initialization and self-inspection of two major part of the main program to better cope with the disruption procedures and fault procedures, the preparation of the relevant distance protection The main program, suspended from the service program designed to protect from the failure to protect the design process. Computer protection through the design, three from the protection of computing and related procedures designed so that the whole system of combining organic and achieve a 110 KV line from the computer protection.
 
 Key words：Distance Protection; Three-phase distance protection parameters; Data Acquisition System; Interrupted service program
 
 目 录
 第1章 绪 论 1
1.1 微机继电保护的历史背景 1
1.2 微机继电保护的现状 2
1.3 微机继电保护的发展方向 4
 第2章 110KV线路微机距离保护系统设计 5
2.1数据采集系统设计 5
 2.1.1 ADC原理模数变换器 6
 2.1.2 数据采集系统方案 6
2.2 CPU主系统设计 8
 2.2.1 微处理器 8
 2.2.2 存储器 9
 2.2.3 两路开出回路 11
 2.2.4 六路开出回路 11
 2.2.5 CPU的开入量 11
2.3 开关量输入/输出回路设计 11
 2.3.1 开关量输入回路 11
 2.3.2 开关量输出回路 12
2.4 跳闸出口电路及逻辑等电路设计 14
 2.4.1 跳闸出口电路 14
 2.4.2 逻辑电路 15
 第3章 110KV线路微机距离保护相关计算 17
3.1 距离保护的原理 17
图3.1  距离保护原理图 17
3.2 三段相间距离保护参数计算及动作值整定 18
3.3 三段接地距离保护参数计算及动作值整定 21
 第4章 110KV线路微机距离保护流程图 28
4.1 主程序流程图 28
 4.1.1 初始化 28
 4.1.2 自检 28
4.2 中断服务程序流程图 30
 4.2.1 电流电压求和自检功能 30
 4.2.2 不对应工作状态 30
4.3 故障处理程序流程图 32
 4.3.1 电压电流求和自检出错时告警 32
 4.3.2 手和于故障线路 32
 4.3.3 方向元件 32
 第5章 结论 34
 参考文献 35
 致 谢 36
 附 录1 程序清单 37
 附 录2 原理图 44