中文摘要
变电站是电力系统中不可缺少的重要环节，它担负着电能转换和电能重新分配的繁重任务，对电网的安全和经济运行起着举足轻重的作用。变电站作为输配电系统的信息源和执行终端，要求提供的信息量和实现的集成控制越来越多。因此，目前的变电站迫切需要一个简约的、智能的系统，实现信息共享，以减少投资，提高运行、维护效率。这些运行和管理的需求使智能变电站成为变电站自动化系统的发展新方向。随着计算机应用技术和现代电子技术的飞速发展，开展智能变电站的设计及研究具有重要意义。
本设计主要研究内容如下：
首先，阐述智能变电站的研究背景、基本概念及技术特征、研究现状，提出了智能化变电站主要支撑技术；其次，进行智能变电站技术特征及架构体系的研究，提出了智能变电站的主要技术原则及技术特征，并对三层两网结构的智能变电站的架构体系进行了详细的介绍，详细分析了过程层网络和站控层网络的结构；作为智能变电站的主要通讯手段，本文对智能变电站的IEC61850通讯标准进行了详细的介绍。
在介绍智能变电站的主要支撑技术、技术原则、技术特征及通讯标准后，对智能变电站的高压设备技术特征、组成架构进行了介绍，并对智能变压器、智能开关设备进行了初步设计。
最后，基于上述的工作，对智能变电站二次设备与监控系统进行进一步的研究，给出了智能变电站站控层设备集成优化设计方案及完成了智能变电站在线监测系统多层分布结构设计。并以220kV、110kV电压等级为例，给出了220kV电压等级智能变电站通用设计三层两网设计方案及110kV电压等级智能变电站通用设计三层两网设计方案。
关键词智能变电站，架构体系，三层两网，IEC61850，在线监测系统
Abstract
Substation is an important part of the power system, it is responsible for the heavy tasks of power conversion and power redistribution, and plays an important role in the safety and economic operation of power grid. Substation, as the information source and executive terminal of power transmission and distribution system, requires more and more information and integrated control. Therefore, the current substation urgently needs a simple and intelligent system to realize information sharing, so as to reduce investment and improve operation and maintenance efficiency. These requirements of operation and management make the Smart Substation become a new direction of substation automation system. With
the rapid development of computer application technology and modern electronic technology, the design and research of intelligent substation is of great significance.
The main contents of this design are as follows:
Firstly, the research background, basic concept, technical characteristics and research status of intelligent substation are expounded, and the main support technologies of intelligent substation are put forward. Secondly, the technical characteristics and framework system of intelligent substation technology are studied, and the main technical principle and technical characteristics of intelligent substation are put forward, and the architecture of the intelligent substation with three layers and two networks is introduced in detail. The structure of the process layer network and the station control layer network are analyzed in detail. As the main communication means of intelligent substation, the IEC61850 communication standard of intelligent substation are introduced in this paper.
After introducing the main support technology, technical principle, technical characteristics and communication standard of Smart Substation, the technical characteristics and structure of HV equipment in intelligent substation are introduced, and the intelligent transformer and intelligent switch device are preliminary designed.
Finally, based on the above work, further research on secondary installation and monitoring system of intelligent substation is carried out. The integrated optimization design scheme of substation control layer equipment in intelligent substation is given, and the multi-layer distribution structure design of intelligent substation on-line monitoring system is completed. Taking 220kV and 110kV voltage class as an example, 220kV voltage level intelligent substation general design three layer two network design scheme and 110kV voltage level intelligent substation general design three layer two network design scheme are given.
Key words：Intelligent Substation, Frame System, Three Layers and Two Network, IEC61850,On-Line Monitoring System
