基于单片机微机变压器保护装置设计与实现.doc

摘 要 在我国，110kV变压器微机保护得到了广泛的应用，微机式继电保护在70年代出现以后发展迅速，已逐渐代替了传统的模拟式继电保护，微机保护给继电保护带来了一些新的概念和新的原理。如何进一步提高110kV变压器微机保护的性能，仍然有很多课题需要深入的研究。 本文在全面介绍和评述电力系统微机保护原理及其发展趋势的基础上，对电力系统中大量应用的110kV电压等级的电力变压器的微机保护进行了专门研究。以所制定的保护方案为依据，提出了以80C196KC单片机为核心的微机变压器保护装置的具体实现方法。并对保护装置的硬件系统设计和软件模块设计进行了详细的研究。在硬件设计方面，采用了集成度高的数据采集芯片MAX125，满足了变压器对保护装置的要求。在软件设计方面，采用了优化的快速算法，使该装置具有很高的准确性和可靠性，并在操作上更加简明方便。 本装置将变压器运行工况监测与继电保护相结合，体现了新一代微机保护装置的设计思想。经有关部门实验测试，本装置测量精确，动作快速准确，性能达到设计要求。 【关键词】 变压器；微机保护；继电保护；单片机 ABSTRACT It is widely used that transferring electric power with 110kV transformers in China. Since s computer play a more and more important role in protective relaying，new ideas and new theories also come along with it。And now the protections using computers have taken the place of the traditional protections，but there are many problems needing further research，suh as how to improve the properties when use computers to realize the protection of 110kV transformers. This dissertation give a special research in microcomputer relay protection for power transformer of 110kV , According to this scheme，a design method of power transformer protection device is also advanced. This device uses 80C196KC microcomputer chip as the central processor. Hardware and software are designed in details. On the ways of hardware design, The new type of liquid crystal display, serial communication interface are so this device can meet the demand of Automatic control on power system. On the way of software design, the optimal fast algorithm, technology of menu in man-computer interface and function of self-diagnosis are combined .All these characters give the device great accuracy and reliability and make it easier to operate. The device that combines measurement with protection shows the modern design concept .The experiment results show that this device has accurate measuring, fast and correct response. In a word, its feature qualifies the requirements. 【Keywords】 Transformer；Microprocessor-based Protection；