【作者】 罗强；

【导师】 游大海；

【作者基本信息】 华中科技大学 ， 电力系统及其自动化， 2005， 硕士

【摘要】 随着微电子技术、计算机技术的发展,微机继电保护装置硬件和软件两大方面正在不断地完善和发展。硬件方面,从单片机发展到16位、32位的数字信号处理器和高集成度的嵌入式微处理器。相对于硬件的快速发展,软件方面的发展相对滞后。因此,构建新的硬件平台,并在此基础上采用更先进和完善的软件算法以及软件开发手段已经成为当务之急。本文的研究可以分为以下几个部分: 1.介绍了一种基于32位浮点数字信号处理器(DSP)的新型继电保护装置硬件平台,分析了其核心处理器TMS 320V C 33、复杂可编程逻辑器件(CPLD)、模数转换电路、存储系统、外围接口等硬件设计特点和性能。2.分析了从故障电流电压信号中提取所需的基频或高频分量的各典型算法特点,采用构造故障波形和利用实际故障录波数据对各算法进行了仿真对比,研究了各算法的优缺点,进而提出了一种将递推最小二乘算法和带差分滤波环节的全波傅氏算法相结合的新型算法方案。3.研究了所提新算法在基于DSP的新硬件平台上的实现方法。详细介绍了程序流程图、数据存储格式和读取方法,并指出了实际编程中要注意的一些问题。为了保证算法精度,每基频周期内的采样点数必须固定,论文给出了一种跟踪系统频率并实时调整采样率的软硬件方案。4.将嵌入式图形用户界面(GUI ,Graphical User Interface)技术引入到继保装置的人机界面设计中。分析了嵌入式GUI 的技术特点和体系结构,论述了采用这种技术的必要性与可行性。并以μc /GUI为例,详细介绍了开发原理、步骤和方法,指出了开发过程中需要注意的一些问题。本文最后总结了在以DSP为处理器的继保装置硬件平台上应用新算法和采用嵌入式GUI 进行人机界面设计给装置动作快速性和准确性以及整体性能方面带来的提高。更多还原

【Abstract】 With the development of micro-electronics technology and computer technology, relay protection equipment based on micro-computer has been improved unceasingly from hardware and software. In the aspect of hardware, it has developed into 16 bit or 32 bit-digital signal processor and highly compositive embedded micro-processor from single chip. In comparison to the rapid development of hardware, the development of software has lagged. So it is urgent to construct new hardware flatform and adopt more advanced and perfect software algorithm and tapping measures based on it. Research of this paper can be divided into the following aspects. 1. The paper introduces a new type of protection hardware flatform based on 32 bit float DSP and analyses the character and performance of some parts: the core processor CPU, complex and programmable logic device CPLD, AD switching circuit, memory system and peripheral interface. 2. The paper analyses characters of various typical algorithms to pick up requisite electro-value of basic frequency or high frequency from fault current or voltage signals, simulates and contrasts all the algorithms with constructed fault waveform and real fault recording data, makes a study of the merits and shortcomings of all the algorithms, and then puts forward a new type of algorithm which combines recursive least squares algorithm and all-period Fourier algorithm with differential filter. 3. The paper makes a study of how to realize the algorithm on the DSP hardware flatform. It introduces the program flow chart, data store format, reading and writing method in detail, and also points out some questions that need to be paid attention to in the programming. In order to insure the precision of the algorithm, the hits in a period must be fixed, so the paper puts forward a method which can adjust sampling frequency in real time according to the real frequency of the power system. 4. The paper introduces the embedded Graphical User Interface technology into the design of the equipment’s interface. It analyses the technical characters and system structure of embedded GUI, discusses the necessary and executable points to adopt this technology, then introduces the developing principle, approach and means in detail with the example of μc /GUI, and then points out some questions that need to be paid attention to in the developing process. In the end, the paper summarizes that it can improve the action speed, veracity and the monolithic performance of the equipment when adopting the new algorithm and embedded GUI technology on the DSP hardware flatform.更多还原