关键词: 智能电网, 信息物理系统, 电力系统安全, 虚假数据攻击, 信息物理融合安全

Abstract: Smart grids integrate the power system engineering technology with the information and communication technology as a typical cyberphysical system. Resulting from the frequent cyberattacks on computer networks and communication networks, the smart grid has become the focus of cyberattacks. False data injection attack is one type of cyberphysical attacks, which has aroused public concern. It can physically tamper with the remote access utilities, intentionally intercept communication traffic flows or cooperatively manipulate data transmitted over the communication network to circumvent the power system integrity check and then malfunction equipment even collapse the whole power system. According to its attack targets, it can be divided into four categories: device attack, data attack, privacy attack and network availability attack. In order to defend against this kind of attack, fusion security measures are designed which can combine the characteristics of the power system and network data flow to detect the bad data and locate the failed physical equipment. With the development of advanced information technology, smart grids will face enormous challenges on fusion security.

Key words: smart grids, cyber-physical system, power system security, false data injection attack, cyber-physical fusion security