中文摘要：

智能电网在传统电网基础上，通过先进的信息技术手段实现能源和电力的进一步精密化调控．文中在总结智能电网的概念定义、国内外发展现状、主要技术难点和挑战的基础上，着重从信息技术的角度提出适合于智能电网发展的信息系统体系结构．该结构分为3个层次：基础设施层，包括电力系统基础设备及通信网络；支撑平台层，包括传感量测、数据存储、分析决策和控制执行4个支撑平台；应用体系层，包括电源侧、电网侧和用电侧3类应用；真正实现物理、信息与应用系统的融合互动，信息、能量与业务流的高度一体化．该文详细总结了该体系结构涉及到的各方面技术的发展现状，同时指出了未来可能带来突破的研究方向．

英文摘要：

Smart grid is built on top of traditional power grid. With supports of the advanced in- formation technology, fine-grained power scheduling and control can be better achieved in smart grid. In this survey, the concepts of smart grid are summarized, with detailed introduction to the state of the art technologies. Information system architecture of smart grid is proposed on basis of major difficulties and challenges in smart grid development. The architecture is composed of three layers： infrastructure layer, including power grid devices and communication network; support- ing platform layer, including sensing ~ measurement, data ~〉- storage, analytics ga decision, control g~ execution; application layer, including generation-side, grid-side and demand-side three types of application. The architecture interacts with physical, cyber, and application sys- tems with highly integrated information, energy, and business flows. Related techniques are summarized in details. Future research directions on information technology for smart grid are also proposed.