220kv变压器微机保护原理研究.doc

220kv变压器微机保护技术的研究 摘 要 作为电力系统继电保护重要组成部分的变压器继电保护，对保障变压器的安全运行具有十分重要的作用。本文在介绍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22035KV电压等级的变压器的继电保护进行了专门研究,根据这一类变压器的运行特点吸取以往各种保护方法的长处了一套适合于22035KV电压等级的电力变压器保护方案以所制定的保护方案为依据了以位单片机为核心的变压器微机保护装置的硬件平台,保护装置的硬件系统设计和软件模块设计在硬件设计方面在软件设计方面,Abstract Transformer relaying protection is one important part of power system relay protection, it is very important to the transformers safe operation. This paper is on introduce the microprocessor-based protection power system to protect the foundation of the principle and its development trend , to power system inside large quantity application of 220/35KV electric voltage the grade s transformer of relay protection the specialized researched, and analyze the produce cause and characteristic of the unbalanced current which influence the reliability and sensitivity of transformer differential protection, some microcomputer-based methods are compensating the unbalanced current. According to this the transformers movement characteristics , absorb the strength of the every kind of protection method before , formulation a suitable for 220/35KV electric voltage the grade’s transformer protect the project , with differential protection and protect with gas to main protection , and the low electric voltage is after starting of protect over the electric current for to have the protection . With the established protection the project is a basis , and with the transformer microcomputer-based protection that MCS-96 series 16 single-chip machine 8098 for the core to choice , hardware that protect the device terrace hardware that combine the right protect the device the system design and software mold the piece designed. Design the aspect in the hardware , include data collecting system , CPU main system , switch amount to import / output the system and trip to export the design of such circuit as some ,etc. mainly. Design the aspect in the software , protect algorithms to compare , analyze to the existing m