基于ARM的DTU遥信与遥控单元的设计与实现

论文简介：

随着人们对电能质量的要求越来越高，配电网的供电可靠性受到很大重视。开闭所配电终端 DTU 是配电网系统的重要组成部分，DTU的遥信遥控单元实现了对配电系统 中运行设备的实时监控功能，遥信遥控的可靠性直接影响电能质量的高低。然而在电网运行期间，经常出现遥信的误报与遥控的误动，这将给我们带来了直接的经济损失，甚 至可能引发巨大电力事故。为了解决上述问题，本文提出了基于ARM的DTU遥信与 遥控单元的设计。 

论文首先针对 DTU 的遥信遥控技术展开研究，确定了具体设计目标和功能需求， 在完成遥信遥控单元的总体设计以及软硬件的划分之后，然后进行了具体的软硬件设计 与实现。硬件设计采用多板卡设计方案，包括 CPU 板、遥信遥控板、液晶板，其中遥 信遥控板可进行热插拔与灵活配置，能够满足不同的配电场合。CPU 板采用基于 ARM9 内核的 i.MX287 处理器，遥信遥控板与液晶板采用基于 ARMv7 架构的 32 位芯片 STM32F103VE 处理器，速度快、精度高、稳定性好。遥信遥控回路采用两级隔离，抗 干扰性更强。软件设计采用模块化设计方案，包括 CPU 板、遥信遥控板、液晶板的软 件设计。整个软件设计利用了嵌入式开发技术，遥信技术，遥控技术等多种技术，依照 IEC60870-5-101电力规约，在异步串口通信和CAN通信的基础上采用多线程编程思想， 实现了遥信、遥控、SOE、数据存储与上传、系统对时、显示与通信等配电监控功能。 在完成整个设计之后，对遥信遥控单元的功能进行了测试，测试结果表明，遥信遥 控单元的设计符合预期目标，具有一定的应用价值。

ABSTRACT

As people have more and more high demand of the power quality, the supply reliabilityof power distribution network attracts more and more attention. DTU is the importantcomponent of distribution network, its teleindication unit and telecommand unit completereal-time monitoring function of running equipment in the power distribution system. Thereliability of teleindication and telecommand directly influences the power quality. However,during power grid operation period, teleindication often appears false alarm and telecommand often appears maloperation. These will bring us the direct economic losses and even may leadto huge power accidents. In order to solve the above problems, this paper puts forward thedesign of DTU teleindication and telecommand unit based on ARM. 

First of all, this paper studies DTU teleindication and telecommand technology, confirming specific design aim and functional requirement. After completing the wholedesign of teleindication and telecommand unit and the partition of soft-hardware, the specificsoft-hardware design and implementation are elaborated. The hardware design adoptsmultiple boards’ solution, including CPU board, teleindication and telecommand board, LCDboard. Teleindication and telecommand board is hot-plugging and configures flexibly. It canmeet the different requirements of power distribution occasions. CPU board uses i.MX287processor based on ARM9 core. LCD board and teleindication and telecommand board use ARMv7 architecture's 32-bit STM32F103VE processor. Multi processor has thecharacteristics of fast response speed, high accuracy and good stability. The teleindication andtelecommand’s circuit uses two stage isolated optocoupler to improve counter-jammingperformance. Software design uses modularized scheme, including software design of CPUboard, teleindication and telecommand board, LCD board. The whole software design adopts the development of embedded technology, teleindication technology, telecommandtechnology etc. According to IEC60870-5-101 power protocol, using the idea ofmulti-threaded programming based on asynchronous serial communication and CANcommunication, finally realizing the distribution monitoring functions, such as teleindication, telecommand, SOE, data conservation and uploading, time setting, display andcommunication and so on. 

At last, completing the whole design of the soft-hardware and testing teleindication andtelecommand unit’s functions. The test results show that the design of teleindication andtelecommand unit meets the desired goal and has a certain application value.

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