基于电力电子技术的电力变压器DSP保护装置的研制

发布时间：2018-02-17 00:19

本文关键词： 全控型电力电子器件(IGBT) 变压器传统保护断路器 DSP保护　出处：《安徽工业大学》2017年硕士论文　论文类型：学位论文

【摘要】：断路器是电力系统的重要开关元件,其重要作用是切断负荷电流和短路电流,传统断路器在应用过程产生电弧且需要配备专业灭弧装置,同时其具有开关速度较慢、使用寿命较短的缺点,随着IGBT科研的深入和制造技术的提升,功率器件的应用实例不枚胜举。电力电子器件具有无电弧、开关速度快且寿命长的优点,因此利用电力电子器件替代断路器的思想应运而生。电力变压器是供配电系统的重要组成部分,它的安全关乎整个系统的安危。在电力变压器的日常运行中,会出现多种不同故障和不正常运行状态。本文利用DSP作为控制手段来实现变压器保护,DSP保护具有传统的保护难以比拟的优点,维修整定方便且具有很高可靠性、比较灵活、易于取得额外功能、可以得到较好的保护效果。本文首先介绍论文的研究背景及发展应用,分析了传统断路器的工作特性,以变压器的电流速断和过流保护为研究对象,用全控型电力电子器件IGBT来实现替代传统断路器保护。本文重点工作有DSP芯片的选型、低通滤波设计、开关量接口设计、出口电路设计、通讯接口设计等硬件设计,软件设计方面利用了模块化设计思想,将各功能模块的软件控制尽量独立化,同时具有相对独立接口,便于今后的功能扩展。DSP保护通过采样、判别、通讯及运行实现了电力变压器的电流保护,充分发挥了电力电子器件在保护应用中的优越性。
[Abstract]:The circuit breaker switch is an important element of electric power system, its important function is to cut off the load current and short-circuit current, the traditional circuit breaker arc extinguishing device, and equipped with professional in the application process, at the same time with a switch of its slow speed, short service life of the shortcomings, with IGBT scientific research and manufacturing technology improvement, application power devices do not give pieces wins. Power electronic device has advantages of no arc, fast switching speed and long service life, so the use of power electronic devices to replace the circuit breaker thought came into being. The power transformer is an important part of power supply and distribution system, its safety is related to the system safety. In the daily operation of power transformer. There will be a variety of different fault and abnormal operation state. This paper uses DSP as a control means to achieve the protection of transformer protection, DSP protection is difficult to compare the traditional The advantages of convenient maintenance, tuning and has very high reliability, flexible, easy to obtain additional function, can provide better protection. This paper firstly introduces the background and development of research and application, analyzes the characteristics of the traditional circuit breaker, the transformer current and overcurrent protection as the research object, using the controlled power electronic devices to achieve the IGBT instead of the traditional circuit breaker protection. This paper focuses on the selection work of DSP chip, low-pass filter design, switch interface design, export circuit design, communication interface design, hardware design, software design using modular design, each functional module of the software to control the independent at the same time, has a relatively independent interface, extended.DSP protection by sampling, for the future of the discriminant function, communication and operation to achieve the current protection of power transformer, give full play to the power The advantages of sub devices in protection applications.

【学位授予单位】：安徽工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM41

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