智能配变终端低压集抄技术的研究与实现
发布时间：2018-12-27 19:34
【摘要】：在配电网自动化系统中,智能配变终端是满足自动化需求不可或缺的配电网组件,它可以实时监测和分析配电变压器的工作情况,对于配电网的安全性、可靠性等方面都有着重大意义。随着电力线载波通信方式的快速发展,使其在智能配电网通信中的优势变得越来越明显,它作为一种物理强度大、覆盖范围广、无需布线、成本少的特殊接入方式,正被广泛应用。由于电力线信道复杂的通信特性,在数据传输过程中,会有高误码率、低可靠性的现象存在,为此,本文采用了基于正交频分复用技术的G3-PLC标准,它是面向智能电网的全球开放性协议,通过采取先进的信道编码技术以及强大的纠错编码机制,保证信号在电力线信道中能够进行强大的数据通信。本文首先概述了电力线通信的发展历程,论述了窄带电力线通信的发展现状,着重介绍了智能配变终端的整体设计。其次,论述了OFDM技术的工作原理和关键技术,详细说明了G3-PLC标准的协议和帧结构。随后,借助TI公司的PLC开发板和软件程序从物理层角度分析了信号在电力线复杂信道传输中的通信性能,为G3-PLC标准可以有效应用在智能配变终端提供依据。最后,依据DLT/645规约,对基于G3-PLC标准的智能配变终端进行集中抄表测试。经过大量测试表明,基于G3-PLC标准的智能配变终端低压集中抄表性能优良,具备低误码率、高可靠性的特点,所测得各项数据均符合要求,达到了预期的效果。
[Abstract]:In the distribution network automation system, intelligent distribution transformer terminal is an indispensable component of distribution network, which can monitor and analyze the working condition of distribution transformer in real time, and the security of distribution network. Reliability and other aspects are of great significance. With the rapid development of power line carrier communication mode, its advantages in smart distribution network communication become more and more obvious. It is a special access mode with large physical intensity, wide coverage, no wiring and low cost. Is being widely used. Because of the complex communication characteristics of power line channel, the phenomenon of high bit error rate and low reliability will exist in the process of data transmission. Therefore, the G3-PLC standard based on orthogonal frequency division multiplexing technology is adopted in this paper. It is a global open protocol for smart grid. By adopting advanced channel coding technology and powerful error-correcting coding mechanism, it ensures that the signal can carry out powerful data communication in the power line channel. In this paper, the development course of power line communication is summarized, the present situation of narrow band power line communication is discussed, and the whole design of intelligent distribution transformer terminal is introduced emphatically. Secondly, the working principle and key technology of OFDM technology are discussed, and the protocol and frame structure of G3-PLC standard are explained in detail. Then, with the help of TI's PLC development board and software program, the communication performance of signal in power line complex channel transmission is analyzed from the point of view of physical layer, which provides the basis for the effective application of G3-PLC standard in intelligent distribution transformer terminal. Finally, according to DLT/645 protocol, the intelligent distribution transformer terminal based on G3-PLC standard is tested by centralized meter reading. A large number of tests show that the intelligent distribution transformer terminal based on G3-PLC has excellent performance, low bit error rate and high reliability. All the measured data meet the requirements and achieve the desired results.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM76
本文编号：2393506
[Abstract]:In the distribution network automation system, intelligent distribution transformer terminal is an indispensable component of distribution network, which can monitor and analyze the working condition of distribution transformer in real time, and the security of distribution network. Reliability and other aspects are of great significance. With the rapid development of power line carrier communication mode, its advantages in smart distribution network communication become more and more obvious. It is a special access mode with large physical intensity, wide coverage, no wiring and low cost. Is being widely used. Because of the complex communication characteristics of power line channel, the phenomenon of high bit error rate and low reliability will exist in the process of data transmission. Therefore, the G3-PLC standard based on orthogonal frequency division multiplexing technology is adopted in this paper. It is a global open protocol for smart grid. By adopting advanced channel coding technology and powerful error-correcting coding mechanism, it ensures that the signal can carry out powerful data communication in the power line channel. In this paper, the development course of power line communication is summarized, the present situation of narrow band power line communication is discussed, and the whole design of intelligent distribution transformer terminal is introduced emphatically. Secondly, the working principle and key technology of OFDM technology are discussed, and the protocol and frame structure of G3-PLC standard are explained in detail. Then, with the help of TI's PLC development board and software program, the communication performance of signal in power line complex channel transmission is analyzed from the point of view of physical layer, which provides the basis for the effective application of G3-PLC standard in intelligent distribution transformer terminal. Finally, according to DLT/645 protocol, the intelligent distribution transformer terminal based on G3-PLC standard is tested by centralized meter reading. A large number of tests show that the intelligent distribution transformer terminal based on G3-PLC has excellent performance, low bit error rate and high reliability. All the measured data meet the requirements and achieve the desired results.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM76
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