文档介绍：河北工业大学硕士学位论文
基于 DSP 的变压器差动保护装置的研究
摘要
随着我国电力工业的迅速发展,在现代电力系统中,变压器保护装置能否准确、及时、
可靠的动作是保证电网安全运行的关键因素之一。因此,必须根据变压器的容量和重要程
度以及可能发生的各种类型的故障和不正常工作的情况,而装设性能良好、工作可靠的继
电保护装置。微机继电保护装置因其软件设计的灵活性可实现各种故障的判断,得到普遍
应用。
本文首先论述了国内外变压器保护系统发展现状及存在的问题,其次对变压器保护原
理的几个关键问题包括励磁涌流、不平衡电流、差动保护等进行了深入的研究,同时对微
机保护系统中常用的算法进行了深入的研究,为本文的设计提供了理论依据。
本文在总结了变压器微机保护原理应用基础上,设计了一个基于 DSP 的变压器微机差
动保护装置。DSP 拥有快速的指令周期以及地址、数据总线分离等适合快速数字信号处理
的优点。除此之外,它有着丰富的硬件资源、强大的功能、先进的开发环境及开发平台,
能够极大地提高保护产品的性能。因此,为了满足实时监测及处理故障的要求,本文设计
中采用了具有快速处理能力的 DSP 芯片 TMS320VC33 作为核心,提出了集测量、保护、控制、
通信等功能于一体的变压器差动保护装置设计方案。
关键词:变压器,差动保护,DSP,保护算法
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基于 DSP 的变压器差动保护装置的研究
The Study on Differential Protection Device
for transformers Based on DSP
ABSTRACT
With the rapid development of power industrial in our country, the protection device for
transformers whether can exactly, timely, reliably act, which is one of the important factors for
power grid to guarantee running securely in modern electric system. So high-performance and
secure relay protection devices are needed for power transformers. Especially puter
relay protection devices, with software’s agility, find a wide application in protection of power
transformers.
Firstly, the author discusses the situation and problem of protection system of power
transformer at present. Secondly, author makes detailed study on the main aspects of protection
principle of power transformer (including inrush current, the unbalance electric current,
differential protection etc.), at the same time the in-depth study for the algorithms which are
commonly used in the protection of puter relay protection systems provides a
theoretical basis for the design of this paper.
In this paper, a puter relay set for power transformer is designed under
summarizing the protection theory. DSP owns rapid instruction periods, address buses separated
from data buses, which can excellently adapt to the rapid digital signal process. Besides