开关柜论文变电站高压开关柜实时在线温度监测系统软件.doc

开关柜论文：变电站高压开关柜实时在线温度监测系统软件设计【中文摘要】随着我国经济的快速增长,电力需求量日益增加,电力供应量的持续快速增长给电网设备带来一系列安全问题,而电网设备主要集中在变电站,其中开关柜作为变电站的重要电气设备,担负着关合及断开电力线路、保护系统安全的双重作用,对变电站的安全可靠运行起着举足轻重的地位。近年来,在电厂和变电站中,由于开关柜触头过热已发生多起事故,造成火灾和大面积的停电,因此解决开关柜触头过热问题是杜绝此类事故发生的重要手段。由于高压开关触头处于高电压、大电流、强磁场以及极强的电磁干扰环境中,人工巡查测温困难,且无法使用常规的测温方法对温度进行监测。光纤光栅传感器的发展为高压开关柜内的温度监测提供了可能。因此,建立一套完善的变电站实时在线温度监测系统势在必行。本课题来源于日照五莲向阳站实时在线温度监测系统项目。在分析了当前变电站温度监测的现状以及系统的需求分析之后,设计并开发了基于光纤光栅传感器测温方法的实时在线温度监测系统。系统工作流程：底端数据采集模块将采集到的数据保存到MySQL数据库中,现场监测层首先从MySQL数据库中取得数据,然后进行相应处理,包括实时显示、报警以及历史查询等操作,并按照循环式远动规约CDT将实时测量温度及报警数值打包为遥测遥信上行传送到远程控制室中,及下行命令实现远程对时等操作。满足了变电站与调度部门对信息的实时性、可靠性的要求,真正实现实时在线温度监测。数据库系统设计是系统设计的基础且重点部分。频繁的插入、查询等操作,给数据库的可靠性、实时性等性能带来严峻的考验,并直接影响整个系统的运行情况。因此,本系统选用MySQL数据库,首先对数据库进行结构设计,并着重分析了MySQL数据库性能优化问题,使MySQL数据库达到最高性能。本文详细介绍了软件设计,主要包括软件平台的搭建以及各个功能模块的具体设计与实现。采用Netbeans开发出了良好的人机交互界面,主要包括：各测点的实时刷新模块、用户管理配置模块、实时列表实时曲线模块、历史列表历史曲线模块、报表打印模块、报警模块以及CDT远动通信模块等。适用于无人值守的变电站温度监测。目前,系统已投入使用,而且运行良好。本系统实时在线监测温度变化情况,并可预测温度的变化趋势,把事故消灭在萌芽中,对保证设备安全可靠运行具有十分重要的现实意义。【英文摘要】With Chinese rapid economic growth, electricity demand increases day by day. The sustained rapid growth of electricity supply has brought a series of security problems to the power grid equipment. Power equipment mainly concentrates on substation. Switchgear, as the major power equipment in substation, is responsible for closing and disconnecting power line and protecting the security of the system. Switchgear plays an important role in the safe and reliable operation of substation. In recent years, several accidents have occurred in power plant and substation because of switchgear contact overheating, and caused fires and large-scale power outage. So the key to prevent such accidents is to solve the problem of switchgear contact overheating. However, because the environment where the high-voltage switch contact exists is high voltage, heavy current, strong magnetic field and strong electromagnetic interference, it is difficult to measure temperature manually and can not use the conventional temperature measurement methods. The development of fiber grating sensor offers the possibility of temperature monitoring in high voltage switchgear. Therefore, it is imperative to establish a comprehensive real-time online temperature monitoring system.This subject comes from the Rizhao Wulian Xiangyang substation real-time online temperature monitoring system project. We design and develop a new real-time online temperature monitoring system based on fiber grating sensor after we analyze the current situation of temperature monitoring in substation and the system requirements. The system works as follows:The data acquisition module will collect the measurements and save them to the MySQL database. And the on-site monitoring system first obtains the data from the database, and then handles data, such as real-time display, alarm and history search. Besides, it sends real-time temperature and alarm to the remote control room and checks time remote following CDT protocol. It meets the real time and reliability of the substation and the dispatcher center. So this system can really monitor temperature real time and online.The design of database is the basis and emphasis of the system. The frequent insertion and query operations bring serious challenges on the reliability and real time of the database so that the whole system may work badly. So we choose MySQL database. First, we design the database structure, and analyze the performance optimization of MySQL database so that the database can reach its high performance.This paper describes the software design in detail, including the build of the software and the design and implementation of various functional modules. We use Netbeans to develop a good human-computer interface, including real-time refresh of the measuring point module, the user management configuration module, real-time table, real-time curve, historical list, historical curve, report printing module, alarm module, and CDT communication module. This system is suitable for the unattended substation temperature monitoring.At present, the system has been put into use and works well. This system can monitor temperature changes online and real time, and predict the temperature trend. So the accident can be nipped in the bud. It is significant to ensure the safe and reliable operation of the equipment.【关键词】开关柜 实时测温 数据库 CDT【英文关键词】switchgear real-time monitoring temperature database CDT【目录】变电站高压开关柜实时在线温度监测系统软件设计摘要10-12ABSTRACT12-13第1章 绪论14-201.1 课题提出的背景及意义14-151.2 现有开关柜测温方案比较15-171.3 课题研究内容与章节安排17-201.3.1 课题研究内容171.3.2 论文章节安排17-20第2章 系统硬件设计及安装20-262.1 温度监测要求与技术指标20-212.1.1 温度监测要求20-212.1.2 技术指标212.2 硬件整体方案设计21-222.3 传感器的设计封装22-232.4 传感器现场安装23-252.4.1 传感器分布原理图23-242.4.2 传感器现场安装24-252.5 本章小结25-26第3章 系统软件设计26-423.1 软件设计原则263.2 软件总体架构及功能模块设计26-293.2.1 软件总体架构设计26-273.2.2 功能模块设计27-293.3 软件开发平台和开发工具29-303.3.1 开发平台的选择29-303.3.2 开发工具的选择303.4 多线程设计30-343.4.1 多线程基础30-313.4.2 多线程创建31-333.4.3 多线程同步33-343.5 CDT规约解析34-413.5.1 CDT规约简介343.5.2 CDT规约帧结构34-403.5.3 CDT规约传送方式40-413.6 本章小结41-42第4章 系统数据库设计42-584.1 数据库简介42-444.1.1 数据模型42-434.1.2 MySQL简介43-444.2 JDBC(Java Database Connectivity)基础44-474.2.1 JDBC简介444.2.2 JDBC的结构模型44-464.2.3 JDBC操作数据库的基本流程46-474.3 数据库结构设计47-514.4 数据库性能优化51-574.4.1 选择优化的数据类型51-524.4.2 索引优化52-544.4.3 查询性能