分析了智能电网的发展目标，介绍了智能变电站的功能和系统结构，整个智能变电站可分为过程层、间隔层、站控层以及网省的生产管理系统等部分。提出了建设智能变电站的几个关键技术：一次设备智能化、信息网络化以及在线监测。借鉴 IEC 61850中功能自由分配的概念，对变电站的各种功能进行了分析和合并，将智能变电站的过程层和间隔层合并为设备层，提出了一种面向未来，适应智能电网要求的智能变电站体系结构。

Based on the development goal of smart grid, the function and system structure of smart substation was introduced. The smart substation system was divided into process layer, spacer layer, station control layer and grid-province production management system. Some key technologies for the construction of smart substation was proposed, including primary equipment intelligence, information network and on-line monitoring. Finally, based on the concept of free distribution function of IEC 61850, this paper analyzed and consolidated all sorts of functions of the substation, combined the process layer and the spacer layer of smart substation into the equipment layer, and put forward a intelligent substation system structure which could face the future and adapt to the requirements of smart grid.