光数字和模拟一体化继电保护测试仪的实现

发布时间：2018-05-11 12:45

本文选题：继电保护测试仪 + 计算模块　；参考：《华北电力大学》2015年硕士论文

【摘要】：伴随电力系统飞速发展而来的是对电力系统可靠性要求的日益提高。近年来,国内外发生的多次严重电力事故对社会造成了不可估量的经济损失,充分暴露了电力系统在大电网背景下的脆弱。因此,如何在日益复杂的电力系统下进一步提高自身保护与控制能力,最大程度减少事故的发生概率,成为了至关重要的事情。继电保护测试仪是根据国家颁布的《微型机继电保护试验装置技术条件》等标准,研制出的对继电保护装置进行仿真、测试的仪器。其性能、仿真试验结果的准确性将直接影响到继电保护设备是否安全可靠。随着我国电力事业的飞速发展,继电保护技术的不断提高,用户对继电保护测试仪也提出了更高的要求。本论文的研究内容基于“数字继电保护测试仪DSP系统的软件开发”科技合作项目。论文的主要研究内容如下：(1)通过阅读大量文献与实际操作,分析了继电保护测试仪发展现状,掌握了光数字继电保护测试仪与模拟继电保护测试仪的工作原理及性能特点,总结了两种测试仪结构上的相同与不同之处。阐述光数字与模拟继电保护测试仪一体化的实际意义,设计出一体化测试仪的整体结构；(2)通过在EMTP仿真软件中搭建电力系统继电保护常用输电线路计算模型,研究输出文件生成方式,编写C++程序使得生成文件自动转化为COMTRADE标准格式等研究内容,实现了一种应用于一体化测试仪上位机基于EMTP的复合故障实时计算模块。计算模块与传统计算、RTDS进行比较,阐述新仿真模块的优越性；(3)一体化测试仪下位机数字信号处理系统的核心是DSP。本文将对继电保护测试仪硬件平台结构进行优化设计,并根据其性能要求,分析DSP芯片特性指标,选择出适用于一体化继电保护测试仪的DSP芯片,FPGA芯片及网络芯片,并对所选取的DSP芯片外围电路进行设计。最后通过DSP编程,验证芯片功能；(4)设计一种应用于一体化测试仪的模拟量功率放大模块,放大模块由基于互补推挽式电流放大电路构成。其中电流放大电路可以实现根据输出电流大小不同切换不同放大电路输出回路的功能。并进行仿真验证放大电路实际效果。最后根据所设计的电路,选择电路中主要元器件型号。实现测试仪的模拟量功率放大模块降低功率,减小体积,节约成本,提高效率的设计目的。
[Abstract]:With the rapid development of power system, the requirement of power system reliability is increasing day by day. In recent years, many serious electric power accidents at home and abroad have caused incalculable economic losses to the society, and have fully exposed the fragility of the power system in the context of large power grids. Therefore, how to further improve the ability of self-protection and control under the increasingly complex power system, and reduce the probability of accidents to the greatest extent, has become a crucial matter. The relay protection tester is an instrument developed to simulate and test the relay protection device according to the standard issued by the State such as the Technical conditions of the Microcomputer Relay Protection Test device and so on. Its performance and accuracy of simulation results will directly affect the safety and reliability of relay protection equipment. With the rapid development of China's power industry and the continuous improvement of relay protection technology, users have put forward higher requirements for relay protection tester. The research content of this thesis is based on "Software Development of DSP system of Digital Relay Protection Tester". The main research contents of this paper are as follows: (1) through reading a lot of documents and practical operation, this paper analyzes the present situation of relay protection tester, and grasps the working principle and performance characteristics of optical digital relay protection tester and analog relay protection tester. The similarities and differences in the structure of the two kinds of instruments are summarized. This paper expounds the practical significance of the integration of the optical digital and analog relay protection tester, and designs the integral structure of the integrated tester. The calculation model of the transmission lines commonly used for the relay protection in power system is built in the EMTP simulation software. The method of output file generation is studied, and the C program is written to automatically transform the generated file into COMTRADE standard format. A real time calculation module of complex fault based on EMTP is implemented in the host computer of integrated tester. Comparing the calculation module with the traditional RTDS, this paper expounds the superiority of the new simulation module and expounds that the core of the digital signal processing system of the lower computer of the new simulation module is the DSP3). In this paper, the hardware platform structure of relay protection tester is optimized, and according to its performance requirements, the characteristic index of DSP chip is analyzed, and the DSP chip and network chip suitable for integrated relay protection tester are selected. The peripheral circuit of the selected DSP chip is designed. Finally, through DSP programming, the function of the chip is verified. (4) A kind of analog power amplifier module is designed, which is based on complementary push-pull current amplifier circuit. The current amplifying circuit can switch the output circuit according to the output current. The actual effect of amplifier circuit is verified by simulation. Finally, according to the designed circuit, select the main components in the circuit model. The purpose of the design is to reduce the power, reduce the volume, save the cost and improve the efficiency of the analog power amplification module of the tester.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM774

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