能源在线监测系统中电力信息采集器的设计与实现_欧莉.docx
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1、 独创性声明 本人声明所呈交的学位论文是本人在导师指导下进行的研究工作及 取得的研究成果,尽我所知,除了文中特别加以标注和致谢的地方外, 论文中不包含其他人己经发表或撰写过的研究成果,也不包含本人为获 得其它教育机构的学位或证书而使用过的材料。与我一同工作的同志对 本研究所做的任何贡献均己在论文中作了明确的说明并表示感谢。 作者签名: _ 日期: 年 月 日 关于论文使用授权的说明 本学位论文作者完全了解东华理工大学有关保留、使用学位论文的 规定:东华理工大学有权保留并向国家有关部门或机构送交论文的复印 件和磁盘,允许论文被查阅和借阅,可以将学位论文的全部或部分内容 编入有关数据库进行检索,可
2、以采用影印、缩印或扫描等复制手段保存、 汇编学位论文,并且本人电子文档的内容和纸质论文的内容相一致。 保密的学位论文在解密后也遵守此规定。 作者签名: _ 导师签名: _ 日期: 年月日 论 文 答 辩 日 期 : 年 月 日 毕业论文题目:能源在线监测系统中电力信息采集器的设计与实现 电子与通信工程 专业 2013级 硕士生姓名 : _ mm 指导教师(姓名、职称 ) : _ 李跃忠(教授 ) 摘要 能源计量作为节能计划的基石,已成为当今世界的热门研宄对象。为了方便对 重点耗能单位实施能源计量数据的在线监测与管理,本文以 “ 江西省能源计量数据 在线采集监测平台 ” 为基础,针对传统设备通信
3、稳定性差、抗干扰能力弱的问题, 设计了一套能够实现电能数据快速、准确、实时采集与传输的智能化电力信息采集 设备。 本文主要研宄了电力信息采集器的硬件和软件实现,重点介绍了电力信息参数 的采集与远程传输方法。为了满足系统对通信性能的需求,选用了具有 5串口的 32 位 STM32F103ZET6增强型芯片作为系统的核心处理器,通过设计最小系统电路、 通信电路、人机交互电路、电源电路、存储电路完成了整个硬件平台的搭建。为了 适应不同环境的需求,系统采用了 RS-485、 电力载 波、 GPRS三种通信方式。通过 对电力信道的分析,利用 Matlab进行信道建模,提出了利用过零检测实现信息的最 佳分
4、时段发送以及中继转发等提高通信质量的措施。考虑到三相四线电压转换的稳 定性对于系统的重大影响,本文针对电源电路的 EMC电磁兼容性展开了详细的设 计。系统的软件设计通过对多任务的管理调度来实现,主要设计了数据自动采集与 存储、通信协议解析与封装、通信信道的建立、指令控制、人机交互等流程模块, 软件设计过程中采用数据加密、数据校验、看门狗定时器来提高信息传输的安全性 和系统的稳定性。 本文所设计的电力信息采集器已通过实验室的测试,并在江西省计量测试研宄 院和江中药业股份有限公司现场试运行。实际应用与测试结果表明,系统能够很好 地实现对智能电表日冻结数据、月冻结数据、重点用户数据、曲线数据、异常告
5、警 数据的采集和传输,能够实时接收管理中心的控制指令并执行相应的操作,通信准 确率和成功率也达到了系统预期的目标。 关键词:数据采集,低压电力载波, GPRS通信, EMC电磁兼容性 THESIS : Design and Implementation of Power Information Collector for Energy Online Monitoring System SPECIALIZATION: Electronics and Communication Engineering POSTGRADUATE: Ouli MENTOR: Liyuezhong Abstract A
6、s the foundation of energy savings plan, energy measurement has become a hot research object of the world today. In order to better supervise energy consumption data from key energy-consuming organization, this paper designs an intelligent equipment which can realize precise,fast,real-time electric
7、energy data acquisition and transmission based on energy data collection online monitoring platform of Jiangxi province. The existing electric energy data acquisition devices not only have problems with communication success rate, accuracy and instantaneity, but also have limitation in scope of its
8、application. This paper introduces a lot of optimized measures which aims to resolve the problems of corresponding stability, corresponding distance and signal anti-interference in traditional devices. This paper mainly researched on hardware and software implementation of power information collecto
9、r. In order to satisfy communication requirements, the system applies 32-bit STM32F103ZET6 as core processor which has 5 serial interfaces. It has completed the construction of whole hardware platform by designing the minimum system circuit, communication circuit, human-interactive circuit, power ci
10、rcuit and memory circuit The system applies three kinds of communication methods which including RS-485, power line carrier and GPRS to adapt different circumstances. It has provided many measures to improve communication quality by analyzing and modeling power line channel through Matlab. One of th
11、e methods is to send message at the best time by detecting zero cross signal, the other one is to send message by relaying. This paper has proposed a detailed design which focused on EMC of power circuit, considered the significant impact caused by voltage conversion of three-phase four-wire. The so
12、ftware design of the system will be implemented through management of multi-mission scheduling. The design of software includes many process modules, which contains automatic data acquisition and storage, communication protocol parsing and encapsulation, establishment of communication channel, comma
13、nd control and human interactive. The system has adapted many techniques which include data encryption, data verification, watchdog to improve data security and system stability. By laboratorial testing, the system has been put into operation in JIMT and Jiangzhong pharmaceutical co. LTD at present
14、The results show that electric power information collector can realize acquisition and transmission of day data, month data, important user data, curve data and warning data. It can receive message from management center and take relevant action. The communication accuracy and success rate has also
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