摘要配电自动化是我国电力系统中的重要环节，它主要负责将二次变压后的电能直接或处理后传给用户使用，因此配电自动化系统的可靠性关乎整个电力系统的安全运行。配电变压器监测终端就是用来监测配电变压器的相关运行参数，并及时可靠的传输给监测总站。随着计算机技术的不断发展成熟，在众多无线通信技术中，GPRS无线通信显露独特的优势。本课题采用GPRS通信实现了监测终端的数据双向传输和指令下达功能。40854
配电变压器监测终端主要由三部分组成：监测分站、通信系统和监测总站，本次设计主要是对监测分站进行设计分析。其中，监测分站采用MSP430F149单片机作为分站的重要核心部分；并通过辅助电路实现信号采集、数据处理、故障报警、系统电源、人机接口、数据存储等功能。数据通过监测终端采集转换后，通过CPU进行处理，如电压和电流的有效值、三相有功功率和无功功率、功率因数等参数的计算。GR47为监测终端的通信部分。在本次课题中还对各模块的软件功能进行了设计。
毕业论文关键词：配电自动化    变压器监测终端    MSP430单片机    数据采集
Abstract Distribution automation changes the secondary variable pressure power, which is important to power system in China. The reliability of distribution automation system decides the whole electrical power system. To improve the power distribution system, the most important way is to monitor the running parameters of distribution transformer and transmits the running parameters to the monitoring station timely. With the development of computer technology, now, GPRS wireless communication shows the special advantages among wireless communication technology. GPRS wireless communication is used in this paper to realize the function of two-way data transmission and control.
Monitoring terminal is composed by the monitoring substation, communication system and monitoring station. The paper mainly designs monitoring station. In the design, MSP430F149 is used as the MCU, which plays an important role in monitoring terminal. By external expansion, the terminal achieves the function of signal acquisition, data processing, fault alarm, power supply, man-machine interface, data storage and so on. After the collected data is transformed, algorithm which is used to calculate effective value of voltage and current, three-phase active power and reactive power, power factor, is gave in the design. The paper also introduces the way of software which realizes the function of each model.
Key words: distribution automation    monitoring of distribution transformer MSP430 MCU    data acquisition
 目   录
摘  要    I
Abstract    II
1 绪论    1
1.1 课题背景及研究意义    1
1.2 国内外研究动态    1
1.2.1 国内研究动态    1
1.2.2 国外研究动态    2
1.3 课题研究内容    2
2 配电数据采集原理及计算    4
2.1 交流采样方式    4
2.2 交流采样频率的确定    4
2.3 交流采样计算方法    5
2.3.1 电压、电流有效值的计算    5
2.3.2 有功功率和无功功率的算法    6
2.3.3 功率因数的算法    6
2.3.4 三相不平衡度计算方法    7
2.3.5 电压合格率    7
3 监测终端总体方案设计    9
3.1 监测终端的硬件方案    9
3.2 通信设计方案    9
3.3 监测终端的基本功能    11
4 监测系统的硬件设计    13 MSP430单片机10kV配电变压器监测终端的设计+电路图:http://www.751com.cn/zidonghua/lunwen_39289.html