10kV馈电线路微机保护系统毕业设计.doc

10kV馈电线路微机保护系统的设计 摘 要 本文研究了以AT89C51为核心的线路微机保护系统的开发，包括保护原理的探讨、装置硬件的设计和软件系统的开发。 在参阅了大量文献资料的基础上，文中对电力系统10kV线路保护的原理进行了分析和总结，选取了以三段式电流保护为主的稳定可靠的保护判据。 本文介绍了保护单元的硬件组成、结构特点，以及软件实现方法。在装置硬件设计方面，进行了深入的研究和设计，包括处理器模块、模拟量采集模块、开入开出模块、人机接口模块、通信模块及电源模块等。论文详细分析了各模块的设计和实现。在软件设计方面采用了三采样值乘积算法。 最后，在总结论文涵盖的研发工作的基础上，提出了下一步工作方向。 关 键 词：微机保护 硬件设计 三段式电流保护 ABSTRACT This thesis mainly discusses the research on the development of microcomputer measuring and protection device for ten kilovolt transmission line based on AT89C51 platform. Firstly, it analyses the protection theory of ten kilovolt transmission line based on the reference to a lot of articles and data, and promotes the stable and reliable judge based on three stage current protection. This paper introduces the hardware, protection unit, the structural characteristics and the software realization method . In the hardware design, conducts in-depth research and design, and it includes a processor module, analog acquisition module, an opening-inserting opening-excluding module, man-machine interface module, communication module and power module The paper details analysis of each module in design and implementation. In software design using three sample value is the product of the algorithm. Finally, at the conclusion of the paper covers the research and development of work put forward, bases on the next work direction . Keywords : Microcomputer protection Hardware design Three phase current protection 目 录 TOC \o 1-2 \h \z \u HYPERLINK \l _Toc327794919 1 绪论 PAGEREF _Toc327794919 \h 1 HYPERLINK \l _Toc327794920 1.1微机保护的概述 PAGEREF _Toc327794920 \h 1 HYPERLINK \l _Toc327794921 1.2微机保护装置的特点 PAGEREF _Toc327794921 \h 3 HYPERLINK \l _Toc327794922 1.3 10kV线路微机保护的功能 PAGEREF _Toc327794922 \h 4 HYPERLINK \l _Toc327794923 1.4研究本课题的意义 PAGEREF _Toc327794923 \h 5 HYPERLINK \l _Toc327794924 1.5论文的结构及安排 PAGEREF _Toc327794924 \h 5 HYPERLINK \l _Toc327794925 2 10kV线路保护原理分析 PAGEREF _Toc327794925 \h 6 HYPERLINK \l _Toc32779492