中文摘要：

在电力信息物理融合系统（cyber physical system,CPS）中,信息空间中的风险有可能传递到电力空间中并导致电力设备故障。为此,有必要研究信息安全风险在电力CPS中的传播机制。首先,阐述了电力CPS中信息安全风险跨空间传播的基本形式,指出智能终端设备是安全风险跨空间传播的必经之路;之后,根据电力CPS的特点和细胞自动机理论的特征,建立了电力CPS中信息物理安全风险的传播模型。最后,以MATPOWER中自带的三机九节点系统为例,通过仿真计算分析了风险跨空间传递概率、故障细胞治愈概率等因素对风险传播的影响,也讨论了仿真时间间隔对仿真结果的影响。

英文摘要：

In a cyber-physical power system, cyber space risks can result in the failure of a power system. Thus, it is necessary to study the propagation mechanism of cyber physical security risks. In this paper, the basic propagation path of cyber physical security risks in a cyber-physical power system is first analyzed. Then, a risk propagation model of the cyber physical security is proposed based on the cellular automata and the characteristics of a cyber-physical power system. Finally, numerical simulations are carried out based on a 9-bus system in MATPOWER. Through these simulations, some important impact factors on the propagation of cyber physical security risks are discussed, such as the transfer probability and recovery rate. The impacts of the simulation time interval on simulation results are discussed as well.