【作者】 金明亮；

【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】 随着中国城乡电网的发展,中小型水电厂和变电站日益增多,用户对电能质量提出了更高的要求,从而也对保护装置提出更高的要求。与此同时,微处理器性价比的增高和电子设计自动化工具的发展也为新一代微机保护装置的开发提供了便利条件。本论文是围绕基于浮点数字信号处理器(FDSP)的线路保护测控装置的研究这一中心任务而展开的。保护逻辑原理的正确性是继电保护能可靠动作的重要因素之一,本文采用自行研制的基于虚拟仪器的继电保护测试系统对中低压线路保护测控功能进行了验证,确保保护逻辑原理的正误与微机继电保护装置软硬件无关。研究论证了采用FDSP作为装置的中央运算处理单元(CPU)以克服单片机微机保护不足的可行性,以复杂可编程逻辑器件(CPLD)取代传统分立逻辑器件从而强化了硬件系统,提高了系统电磁兼容(EMC)性能。研制了基于大屏幕液晶的人机界面显示平台,提供了多种通讯方式,建立了以FDSP 和CPLD 为核心的微机继电保护硬件平台。软件系统层次化是软件可靠性的一个重要因素,本文提出了继电保护软件层次化思想,并利用高级C 语言模块化和FDSP 汇编语言简练高效的特点进行了编码实现。利用FDSP 在数字信号处理上的优势,优化改进了离散傅立叶变换(DFT)算法来提取信号特征量。提出并实现了继电器阵列控制思想,保护判断逻辑程序不直接驱动继电器,而由继电器控制模块统一驱动。研发了可移植的通用继电保护人机界面软件,提出了光标跟踪算法,在研制的硬件平台上实现了线路保护测控功能。装置的试验数据肯定了本文的研究成果。随着计算机技术和芯片技术的发展,基于嵌入式实时操作系统的微机继电保护装置将是电力系统微机继电保护的主流发展方向。更多还原

【Abstract】 With the development of China’s urban and rural power grids and the increasing number of the hydroelectric plant and transformer substation in middle and small size, consumers require higher power quality, and consequently, higher request on the protection devices. In the mean time, the increment of the MPU’s (Micro Processor Unit) performance and cost ratio, as well as the development of Electric Design Automation tools, have offered convenient measures for the exploitation of the new generation protection device based on microcomputer. The research on the protection device for transmission line based on floating-point digital signal processor(FDSP) is the theme of this paper. The correctness of logic theory is one of the most important factors in relay protection. This paper validate the testing function of medium and low voltage line protection through the relay protection testing system based on virtual instrument developed by ourselves, so as to make the validation of the correctness of logic theory be independent of the relay protection devices’software and hardware. The research demonstrates the feasibility of using CPU(center processor unit) with the device of FDSP to overcome the shortage of single chip protection, and strengthens the hardware system by transferring the traditional discrete-logic device to complex and programmable device(CPLD), thus improves the electromagnetism compatible(EMC) performance of the system. Also the research adopts the large liquid crystal display(LCD) screen to be the display of man-machine interface. It provides multiple communication modes, establishes the FDSP and CPLD-cored hardware platform for the relay protection. The software system delamination is one of the most important factors for the software system reliability. We can compile the source code using the modularization of the high-level C language and the conciseness and high efficiency of the FDSP assembly language. Making use of the advantage of the FDSP in the digital signal processing, we can optimize and improve discrete Fourier transform(DFT) in order to acquire the characteristic variables of the signal. The output control of relay adopts the thought of array processing in order to drive the relay by control module but not the logical program. Research and develop the transplant interchangeable software of man-machine interface. Propose a cursor slot algorithm and implement the line protection measure and control function on the hardware platform we develop. The experimentation datas for the devices affirm the research production of this paper. Along with the development of the computer technology and chip technology, the relay protection device based on the embedded real-time operation system will become the main developing direction of relay protection based on microcomputer in power system.更多还原