IEC 61850变电站通信网络仿真与可靠性研究

发布时间：2019-02-12 12:37

【摘要】：随着科学技术与信息化水平的进步，我国电力系统的电网规模也在不断地提高，扩大电网规模带来的直接问题是对于电力系统可靠性的要求也会越来越高，因此，电网的发展面临着新的课题和挑战。近年来，在我国基于IEC61850国际规约的IEC61850变电站飞速发展，但是与之相适应的组网技术及其可靠性研究却略显落后。为提高IEC61850变电站的运行效率及可靠性，本文围绕基于IEC61850标准的变电站通信系统展开研究，在参阅大量相关文献以及现场实习的基础上，对IEC61850变电站的组网技术、仿真方法、可靠性分析以及可靠性提升策略等进行了研究，具体内容如下：第一，分析了IEC61850变电站通信网络的特征，如：智能电子设备（Intelligent Electronic Device，，简称IED）和电子式互感器代替传统设备、网络化数据交换方式突破传统变电站点对点的数据交换方式、数字信号代替模拟信号交换、设备采用标准化建模和统一的描述方法，分析了其发展方向以及组网研究的需求，包括设备选型，拓扑规划，流量延时分析等等。第二，分析了OPNET网络仿真软件技术在IEC61850变电站组网技术研究中的适应性，并基于OPNET对变电站过程层网络进行建模，实现了其仿真，并以榆次北变电站过程层为案例进行了过程层网络的仿真分析。同时，还以OPNET为平台，研究了多链路透明协议（Transparent Interconnectionof Lots of Links，简称TRILL）技术在IEC61850变电站通信网络组网中的应用。实验研究表明基于TRILL技术的IEC61850变电站过程层网络在网络拓扑发现和报文多路径传输技术上具有优势，TRILL技术在网络流量方面适应过程层网络要求并在网络收敛方面具有较强的适应性。第三，提出了以继电保护可靠性为载体的IEC61850变电站通信网络可靠性描述方式，并分析了IEC61850变电站的技术特征对其网络可靠性的影响，最后给出了基于报文可达性的通信网络可靠性分析方法，并以榆次北变电站的母差保护通信网络为实例，对本文提出的可靠性分析方法进行了案例分析。最后，从IEC61850变电站建设周期中的重要环节——调试入手，以榆次北变电站为工程背景，给出了集中式联调准备工作、SCD文件配置检查工作、智能IED设备互联实验以及系统性能实验等方面的建议。并重点针对榆次北的网络测试，就背靠背帧数测试、帧丢失率测试、时延测试和GOOSE传输功能测试等给出了系统的测试方法，为提升IEC61850变电站通信网络可靠性提供了有效策略。整篇论文从基于IEC61850组网研究、可靠性分析及可靠性提升手段三个方面入手进行了大量的研究与分析，研究结果对实现IEC61850变电站的可靠高效运行方面有较大的参考价值与实际意义。
[Abstract]:With the progress of science and technology and the level of information, the scale of power system in our country is also increasing. The direct problem brought by the expansion of power network scale is that the requirement of power system reliability will be higher and higher. The development of power grid is facing new problems and challenges. In recent years, the IEC61850 substation based on IEC61850 international protocol has developed rapidly in China, but the corresponding networking technology and its reliability research are lagging behind. In order to improve the operation efficiency and reliability of IEC61850 substation, this paper focuses on the research of substation communication system based on IEC61850 standard. On the basis of referring to a large number of related documents and field practice, the network technology and simulation method of IEC61850 substation are studied. Reliability analysis and reliability promotion strategy are studied. The main contents are as follows: first, the characteristics of IEC61850 substation communication network are analyzed, such as: intelligent electronic equipment (Intelligent Electronic Device, IED) and electronic transformer replace the traditional equipment, the network data exchange method breaks through the traditional substation point-to-point data exchange mode, the digital signal replaces the analog signal exchange, the equipment adopts standardized modeling and unified description method. The development direction and the needs of networking research are analyzed, including equipment selection, topology planning, traffic delay analysis and so on. Secondly, the adaptability of OPNET network simulation software technology in the research of IEC61850 substation networking technology is analyzed, and the process layer network of substation is modeled based on OPNET, and its simulation is realized. The process layer of Yuci North Substation is taken as a case to simulate and analyze the process layer network. At the same time, on the platform of OPNET, the application of multi-link transparent protocol (Transparent Interconnectionof Lots of Links, (TRILL) technology in IEC61850 substation communication network is studied. The experimental results show that the process layer network of IEC61850 substation based on TRILL technology has advantages in network topology discovery and multipath transmission. TRILL technology adapts to the requirement of process layer network in network traffic and has strong adaptability in network convergence. Thirdly, the reliability description method of IEC61850 substation communication network based on relay protection reliability is put forward, and the influence of technical characteristics of IEC61850 substation on its network reliability is analyzed. Finally, the reliability analysis method of communication network based on message reachability is given. Taking the bus differential protection communication network of Yuci North Substation as an example, the reliability analysis method proposed in this paper is analyzed by a case study. Finally, starting from the important link in the construction cycle of IEC61850 substation-debugging, taking Yuci north substation as the engineering background, this paper gives the centralized connection adjustment preparation work, the SCD file configuration inspection work, Intelligent IED equipment interconnection experiment and system performance experiment and so on the suggestion. Aiming at the network test in Yuci North, the paper gives the test methods of the system, such as back-to-back frame number test, frame loss rate test, delay test and GOOSE transmission function test, which provides an effective strategy for improving the reliability of IEC61850 substation communication network. The whole thesis has carried on the massive research and the analysis from three aspects: the research based on the IEC61850 network, the reliability analysis and the reliability promotion method. The results are of great reference value and practical significance for the reliable and efficient operation of IEC61850 substation.
【学位授予单位】：太原理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM63;TM73

【参考文献】