摘 要：近年来，采煤自动化技术飞速发展，人们对于矿井供电系统的连续性、可靠性和安全性的要求越来越高。为此，本文设计了一种基于C8051F020单片机的智能化组合开关测控保护系统。根据3.3kV煤矿供电系统的运行特点，分析了故障原因及电气特性，系统主要设置了以下保护：先导控制电路、漏电闭锁、漏电保护、过负荷保护、短路保护、断相保护和电压保护；设计了相应的硬件电路、主控程序、功能模块程序；制定了软、硬件抗干扰措施。经过模拟实验表明3.3kV组合开关测控保护系统能够快速、准确、可靠地判断各种故障并执行相应操作，功能全面，性能可靠，具有良好的应用前景。56867

毕业论文关键词：组合开关，C8051F020，故障保护，测控系统

Abstract：In recent years, along with mining automation technology rapid development, people have higher and higher demands for the continuity, reliability and security of the mine power supply system.Thus this paper designed a kind of intelligent combination switch control protection system based on C8051F020 . According to the characteristics of 3.3 kV power supply system, we analyze the cause of the malfunction and electrical characteristics. The system is mainly set up the following protection: pilot control circuit, leakage lockout, leakage protection, overload protection, short circuit protection, phase failure protection and voltage protection. We design the corresponding hardware circuit, main control program developed, software and hardware anti-jamming measures. The simulation results show that 3.3kV combination switch and control protection system is quickly, accurately and reliably, and determine the various failures and take appropriate action, It has good prospects.

Keywords：Combination switch, C8051F020,Fault protection,Measurement and control system

目录

1 前言 4

2 本质安全型先导电路原理与设计 4

2.1 本质安全型电路 4

2.2 本质安全型先导电路的设计 4

3 漏电故障分析与保护电路设计 9

3.1 漏电故障分析 9

3.2 漏电保护硬件电路设计 10

3.3 保护电路动作值的分析与确定 13

3.4 漏电保护实验结果分析 14

4 电压故障分析与保护电路设计 21

4.1 电压故障分析 21

4.2 稳态电压保护电路设计与实验分析 21

4.3 暂态电压保护电路设计 24

5 电流故障分析与保护电路设计 24

5.1 电流故障分析 24

5.2 相敏保护电路原理与设计 25

5.3 负序保护电路原理与设计 26

5.4 过负荷保护电路设计与实验分析 27

6 系统的总体设计与硬件实现 29

6.1 CPU的选则 29

6.2 系统总体设计 31

6.3 系统的硬件实现 32

6.4 硬件电路抗干扰措施 35

7 系统的软件设计 35

7.1 主程序设计 36 C8051F020单片机矿用智能化组合开关测控保护系统的设计:http://www.751com.cn/zidonghua/lunwen_61447.html