基于ARM的智能分段开关控制器分析与设计

发布时间：2018-05-17 17:39

本文选题：配电自动化 + 控制器　；参考：《南京理工大学》2017年硕士论文

【摘要】：随着智能电网的不断发展,国家对电能生产和输配的可靠性、安全性、经济性提出了更高的要求。配电网位于输电系统的终端,下接电力用户,是制约电力系统整体性能的重要环节。其中,10kV配电网由于线路长、覆盖广、设备数量庞大、环境因素多样等问题,智能化相对薄弱,其自动化建设无疑将成为智能电网发展进程中的关键所在。本文从实际应用角度出发,结合功能需求与行业标准,研究并设计了一种基于ARM内核的多功能分段开关控制器。本文首先分析了分段开关的工作原理,设计了过流保护、电流速断、零序保护的动作依据与流程,并根据零序功率方向判定设计了故障分段定位算法,然后分析比较各种交流采样算法的优劣,并对DFT算法进行优化,最后,根据配电网自动化的发展需求,对智能控制器的功能进行了分析与总结。在此基础上,采用模块化设计方法,完成了基于LPC1778芯片的主控模块、基于ADE7878芯片的采样模块、基于SIM800C芯片的GPRS模块、基于ZNE-100TL的以太网接口模块、基于CC2530芯片的ZigBee模块以及电源模块、时钟模块、开入开出模块等系统硬件电路的设计。在硬件设计基础上,编写了各个模块的软件驱动程序,并设计了系统上层功能及流程。最后,对系统软硬件进行调试。实验结果表明,本控制器交流采样误差控制在±0.5%以内,可在50ms内动作切除故障线路,具备可靠的继电保护功能,且具备"三遥"功能及友好的人机交互功能,系统运行稳定,满足设计需求。
[Abstract]:With the continuous development of the smart grid, the state has put forward higher requirements for the reliability, security and economy of electric energy production and distribution. The distribution network is located in the terminal of the transmission system, and the power users are connected to the power system. It is an important link to restrict the overall performance of the power system. Among them, the 10kV distribution network is covered by a large number of equipment because of the long line, the large number of equipment and the environment. The problem of various factors, such as factors and so on, is relatively weak in intelligence, and its automation construction will undoubtedly become the key to the development of smart grid. From the perspective of practical application, this paper studies and designs a multi-function piecewise switch controller based on the ARM kernel, combining functional requirements and industry standards. This paper first analyzes the piecewise switch. Working principle, the operation basis and process of over current protection, current speed breaking, zero sequence protection are designed, and the fault segmentation algorithm is designed according to the zero sequence power direction decision. Then, the advantages and disadvantages of various AC sampling algorithms are analyzed and compared, and the DFT algorithm is optimized. Finally, according to the development demand of distribution network automation, the intelligent controller is applied to the intelligent controller. On this basis, using modular design method, the main control module based on LPC1778 chip, sampling module based on ADE7878 chip, GPRS module based on SIM800C chip, Ethernet interface module based on ZNE-100TL, ZigBee module based on CC2530 chip, power module, clock module, and clock module are opened. On the basis of hardware design, the software driver of each module is written on the basis of hardware design, and the upper function and process of the system are designed. Finally, the software and hardware of the system are debugged. The experimental results show that the control of the AC sampling error of this controller is less than 0.5%, and the fault line can be excised in 50ms. The road has reliable relay protection function, and has the function of "three remotely" and friendly man-machine interaction. The system runs stably and meets the design requirements.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM76

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