【作者】 高丽芳；

【导师】 房国志；

【作者基本信息】 哈尔滨理工大学 ， 测试计量技术及仪器， 2009， 硕士

【摘要】 随着微电子技术、计算机技术和通信技术的飞速发展,远动终端技术在电力自动化系统中发挥着越来越重要的作用。远动终端装置(RTU)作为电力自动化系统的核心装置,完成对现场电力参数实时的测量和监控,广泛应用于电力自动化系统底层的数据采集和过程控制,对提高电力系统的供电安全和可靠性有着重要的意义。本文首先对新一代电力自动化系统的功能需求进行了分析,设计出一种新型的RTU系统结构,解决了早期RTU系统数据传输效率低、功能单一、技术开发性差的问题。其次,针对原有电力自动化系统中RTU采集数据量单一、实时响应差、测试精度低的缺点,本文设计出了一种能采集多种数据量的高速、高精度智能化远动数据采集终端,使RTU系统功能大大增强。该终端采用高性能的数字信号处理器(DSP) TMS320LF2407A作为主控电路,以CAN总线为通信载体;运用快速、简单的傅里叶变换(FFT)算法计算交流电压、电流、频率、功率以及功率因数等电力参数。与以往采用的8位、16位单片机的数据采集终端相比,该终端具有运算能力强、处理速度快、外围电路简单及工作可靠性高的特点。最后,本文使用C语言编写的调试软件对终端进行测试,测试结果表明终端满足了系统对终端采集数据的精度、速度和可靠性的要求。该终端具有低成本、高速、高精度、高可靠性等特点。更多还原

【Abstract】 With the rapid development of microelectronic technique, computer technology, and communication technology, remote terminal technology (RTU) is playing an increasingly important role in the power automation system. As the core device of power automation system, RTU completes the real-time measurement and monitoring for the electronic power parament. And it is widely used in the data acquisition and process control in the bottom of power automation system. RTU has an important significance improvement on power system security of power supply and reliability.Firstly, this paper analyses the function requirement of the power automation system. On this condition, a new RTU system is designed. This new system has solved the problems such as low data transmission speed, simplex function, bad technology opening of the early RTU system.Secondly, in this paper, aimed at the shortcoming of RTU of original power automation system which are a single data acquisition, bad real-time response and low measurement accuracy, an intellect remote data acquisition terminal with a variety data acquisition, high speed and high precision is designed, so that greatly enhances function of the system. The terminal uses a high-performance digital signal processor (DSP) TMS320LF2407A as the main control circuit, CAN bus as the communication carrier; and the power paraments which are AC voltage, current, freqyency, power, power factor and so on are calculated by the algorithm of Fast Fourier Transform (FFT). Compared to the early data acquisition terminals that always used 8-bit and 16-bit MCU, this new terminal has characteristics with better operation capability and faster processing speed. Besides, it makes peripheral circuit simpler and reliability higher.Finally, with the software which programmed with C, the terminal is tested in this paper, and result of the test shows that the terminal meets the system requirements which are speed, precision and reliability of the data acquisition. And the terminal has some characteristics with a low-cost, high speed, high precision, high reliability and so on.更多还原