面向能源互联网的电力线通信技术研究

发布时间：2019-06-11 02:47

【摘要】：能源互联网以电力系统控制网络为核心,融合大量分布式可再生能源,利用信息通信等技术实现能量和信息的双向流动；电力线通信主要包括电力线载波与电力线工频通信技术,它们都无须架设专门线路、没有公共通信服务费用,能够有效利用电网公司自身资源,在能源互联网架构下,在分布式能源接入、微电网优化运行、主动负荷监控等领域具有广阔的应用空间。在此背景下,本文研究了能源互联网整体架构,分析了分布式电源在正常运行和孤岛运行模式下对信息传输的需求；在此基础上,根据电力线载波与工频通信的特点,分析了这两种电力线通信技术在能源互联网中可能的应用场景。针对分布式电源孤岛检测的难题,设计了于基于电力线工频通信的分布式电源孤岛检测方案,并且通过仿真验证了其可行性；将下行工频通信信号发生器安装在主网的母线处,位于分布式电源测的接收电路进行工频通信信号的检测,通过判断下行调制信号是否存在,来实现孤岛检测,由于下行工频通信接收电路的平台与电能计量几乎一致,这样可以在几乎不增加成本的情况下大大提高分布式电源孤岛检测的可靠性。在电力线载波通信技术方面,针对能源互联网的环境特点,研究了载波信道的噪声特性,并且基于参数匹配和传输线理论,构建了宽带电力线载波信道模型,研究了不同载波频率在复杂线路环境下的衰减情况,在此基础上,设计了改进电力线载波通信性能的方案。针对能源互联网中的应用需求,设计了基于电力线载波通信的光伏电站监控方案,以及基于电力线载波与工频通信结合应用的分布式风、水电源监控方案。
[Abstract]:The energy Internet takes the power system control network as the core, merges a large number of distributed renewable energy, and uses information communication technology to realize the two-way flow of energy and information. Power line communication mainly includes power line carrier and power line power frequency communication technology, they do not need to set up special lines, there is no public communication service cost, they can make effective use of the power grid companies' own resources, under the energy Internet architecture, It has a broad application space in the fields of distributed energy access, optimal operation of microgrid, active load monitoring and so on. Under this background, this paper studies the overall architecture of energy Internet, and analyzes the requirements of distributed power supply for information transmission in normal operation and isolated island operation mode. On this basis, according to the characteristics of power line carrier and power frequency communication, the possible application scenarios of these two power line communication technologies in energy Internet are analyzed. Aiming at the problem of distributed power island detection, a distributed power supply isolated island detection scheme based on power line power frequency communication is designed, and its feasibility is verified by simulation. The downlink power frequency communication signal generator is installed at the bus of the main network, and the power frequency communication signal is detected by the receiving circuit located in the distributed power supply measurement. The isolated island detection is realized by judging whether the downlink modulation signal exists or not. Because the platform of downlink power frequency communication receiving circuit is almost consistent with that of electric energy metering, the reliability of distributed power supply islanding detection can be greatly improved without increasing the cost. In the aspect of power line carrier communication technology, according to the environmental characteristics of energy Internet, the noise characteristics of carrier channel are studied, and the broadband power line carrier channel model is constructed based on parameter matching and transmission line theory. The attenuation of different carrier frequencies in complex line environment is studied. On this basis, a scheme to improve the performance of power line carrier communication is designed. According to the application demand of energy Internet, the monitoring scheme of photovoltaic power station based on power line carrier communication and the monitoring scheme of distributed wind and water power supply based on the combination of power line carrier and power frequency communication are designed.
【学位授予单位】：华北电力大学(北京)
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TN913.6

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