LM-1型模拟发电机励磁监控系统的设计与实现

发布时间：2019-05-14 20:50

【摘要】：同步发电机模拟励磁系统是电力系统动态模拟实验室的重要设备。目前,在国内实验室中,该装置多采用模拟电路控制或单片机控制,除与现行电力系统发电机基于DSP的励磁系统有较大的差异外,也没有实现对如失磁等故障的模拟。本文主要研究工作包括：基于STC89C58单片机的LCD界面板的硬件设计和LCD监控界面软件实现；基于TMS320LF2812的主控板开入开出量信号处理；上述两板和上位机之间串行通信协议制定及各自实现；上位机远程监控界面实现。对研究工作进行系统总结之后,主要内容如下：在查阅相关文献的基础上,介绍了国内外模拟励磁系统的研究现状与应用,阐述了研制新型DSP模拟励磁监控系统的意义,以及本文完成的主要工作和创新点。首先,该文讲述了LM-1型模拟励磁监控系统的基本原理及硬件组成。硬件部分主要由励磁控制部分、主回路、操作回路与负阻器组成,对励磁控制部分中的DSP最小系统等模块硬件进行了分块叙述,详细叙述了监控系统涉及到的LCD界面板、DSP主控板以及串行通信接口、I/O隔离转换硬件及其原理。对励磁监控系统的其它部分的硬件进行了简介,重点为主控板开入开出信号处理、LCD显示控制、串行通信模块。其次讲述了了DSP主控板与界面板、远程计算机之间的通信协议的设计与实现；在DSP主程序框架内,按协议实现通信；使STC89C58单片机实现LCD菜单显示操作以及通信协议；设计远程监控计算机界面,并实现与DSP通信。对于DSP主控板程序的整体结构,详细阐明了DSP主控板通信部分、LCD界面板的程序流程,并给出上位机监控界面的程序流程。最后讲述了LM-1型模拟励磁监控系统的调试过程,总结调试中遇到的问题及其解决方法,并提出了模拟励磁系统的拓展设想。试验和现场运行表明：以TMS320LF2812DSP芯片作为控制核心的LM-1型模拟励磁监控系统,与模拟电路控制或单片机控制的同类装置相比,LM-1型模拟励磁系统在稳定性、可靠性和精度等方面具有明显优势,可拓展性强。励磁监控系统功能丰富,控制精度高,实时性好,有效地实现了对现行同步发电机励磁系统的模拟。
[Abstract]:Synchronous generator analog excitation system is an important equipment in power system dynamic simulation laboratory. At present, in the domestic laboratory, the device mostly adopts analog circuit control or single-chip microcomputer control, which is not only quite different from the current excitation system of power system generator based on DSP, but also does not realize the simulation of faults such as demagnetization. The main research work of this paper includes: the hardware design of LCD boundary panel based on STC89C58 single chip microcomputer and the software implementation of LCD monitoring interface, the input and output signal processing of the main control board based on TMS320LF2812. The serial communication protocol between the two boards and the host computer is established and implemented, and the remote monitoring interface of the upper computer is realized. After a systematic summary of the research work, the main contents are as follows: on the basis of consulting the relevant literature, the research status and application of analog excitation system at home and abroad are introduced, and the significance of developing a new type of DSP analog excitation monitoring system is expounded. And the main work and innovation of this paper. Firstly, this paper describes the basic principle and hardware composition of LM- 1 analog excitation monitoring system. The hardware part is mainly composed of excitation control part, main circuit, operating circuit and negative resistor. The hardware of DSP minimum system in excitation control part is described in detail, and the LCD interface panel involved in the monitoring system is described in detail. DSP main control board and serial communication interface, I / O isolation conversion hardware and its principle. The hardware of other parts of excitation monitoring system is briefly introduced, with emphasis on the input and open signal processing of the main control board, LCD display control and serial communication module. Secondly, the design and implementation of communication protocol between DSP main control board and boundary panel and remote computer are described. In the framework of DSP main program, communication is realized according to the protocol, and STC89C58 single chip microcomputer is used to realize LCD menu display operation and communication protocol. Design remote monitoring computer interface and realize communication with DSP. For the overall structure of DSP master control board program, the communication part of DSP main control board and the program flow of LCD boundary panel are expounded in detail, and the program flow of upper computer monitoring interface is given. Finally, the debugging process of LM- 1 analog excitation monitoring system is described, the problems encountered in debugging and their solutions are summarized, and the expansion idea of analog excitation system is put forward. The test and field operation show that the LM- 1 analog excitation monitoring system with TMS320LF2812DSP chip as the control core is stable compared with the similar devices controlled by analog circuit or single chip microcomputer. It has obvious advantages in reliability and accuracy, and has strong expansibility. The excitation monitoring system has rich functions, high control accuracy and good real-time performance, which effectively realizes the simulation of the current synchronous generator excitation system.
【学位授予单位】：湖南大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TM341;TP368.1

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