【作者】 刘鹏；

【导师】 刘乃安； 闫培丽；

【作者基本信息】 西安电子科技大学 ， 工程硕士（专业学位）， 2018， 硕士

【摘要】 社会经济的快速发展,对电能的安全、可靠、优质提出了更高要求。变电站作为电能汇集和控制的核心节点,在保证可靠供电中发挥着不可替代的作用。随着电网智能化不断深入,变电站技术经历了从常规变电站到“综自站”再到“智能变电站”的递进。保护、控制、计算机监控系统等变电站关键设备经历了飞速的更新换代,随之带来的是变电站网络架构的不断调整和优化。智能变电站采纳的网络通信技术须满足变电站交易体系信息传输时间、带宽的要求,同时应适应一、二次装置深度整合等技术发展的趋势。目前传统变电站大多采取常用的站控层、间隔层及过程层“三层两网”的网络架构,变电站站端通信信息种类繁多、数据庞大,不仅造成交换机二次装置费用投资很大,而且对输变电工程的生产建设和运维造成了安全隐患,容易产生不确定性因素。因此,如何合理设计智能变电站二次系统网络结构是必须深入的问题。本文首先查阅文献等资料,第二章介绍了变电站自动化系统架构和特征,第三章介绍了变电站自动化系统组网及设备配置方案,对目前智能变电站的设备运行进行资料收集,掌握大量信息。然后对智能化设备、网络结构、交换机技术的现状进行了阐述和分析,针对存在问题,结合组网方式论证、网络拓扑比较、交换机配置等研究,提出了智能变电站网络“三层一网”优化方案。第四章通过计算机仿真计算,测试了“三层两网”与“三层一网”在“稳态”、继电保护动作、二次系统扰动故障的网络性能,分析了两者的优劣,证明了“三层一网”方案的可行性和有效性,为后续研究工作奠定了良好的基础。最后将该优化方案应用于国家电网公司新一代智能变电站试点工程中,对该方案的合理性和适用性进行了全面验证,证明了该方案具备现场实际应用条件,能够减少交换机及光纤的数量,简化全站二次接线,提升智能变电站网络设备的可靠性和利用率,降低智能变电站网络的运维工作量,压缩了智能变电站网络的建设和运营成本。试点工程的应用表明,变电站网络响应速度明显提升,经济效益显著,具有一定的推广价值。更多还原

【Abstract】 With the rapid development of social economy,there is higher demand for the electric energy,in terms of its safety,reliability and high quality.The substation,as the core of electric energy convergence and control,is playing an indispensable role in providing reliable electricity.With the deepresearch of the smart power grid,substation technology has gone through the transition from conventional substation to integrated substation and then to digital substation.The key equipments of substation,such as protection,control and computer monitoring system,have undergone rapid updating,and the network structure of substation has been constantly adjusted and optimized.The network communication technology adopted in the digital substation must meet the requirements ofinformation transmission time and bandwidth in the substation transaction system,and should be adapted to the development trend of the primary and secondary equipment depth integration technology.This paper first consults the literature and other material to collect the data of the equipment operation of current smart substation and acquire a large amount of information.Then the intelligent equipment,network structure and switchboard technology are analyzed.According to the existing problems,this paper puts forward the optimization scheme of "three layers one network" based on the research of the network modes,network topology comparison and switchboard configuration.Next,the network performance of "three layers two networks" and "three layers one network" in "steady state",relay protection action and secondary system disturbance failure are tested by computer simulation.The result proves the feasibility and effectiveness of the "three layers one network" scheme,which lays a good foundation for the follow-up research.Finally,the optimization scheme is applied to a pilot project of the new generation smart substation of SGCC.The rationality and applicability of the scheme are fully verified.The scheme has the practical application conditions in the field and can reduce the number of switchboards and optical fibers.It can simplify the secondary wiring of the whole station and enhance the reliability and utilization rate of the smart substation network equipment.It reduces the operation and maintenance workload of the smart substation network and reduces the construction and operation costs of the smart substation network.The application of the pilot project shows that the response speed of the substation network is obviously improved and the economic benefit is remarkable.The scheme has certain pextension value.更多还原