建立了WAMS通信系统的信息安全评估框架。通过功能域和ISO/IEC 27002标准将WAMS分为若干子功能域并确定待评估的信息资产,再由功能树模型将功能与资产关联,确立系统信息安全评价的层次结构,并分配各子功能及下属资产的关键度。最后利用证据推理算法融合各子资产的判定数据,减少不同专家评判产生的信息模糊性。算例表明,建立的框架和评估方法对提高WAMS系统的信息安全有一定意义,该框架也可应用在电力安全评估的其他方面。 Established the information security assessment framework of WAMS communication system. WAMS is divided into several subdomains through functional domains and ISO / IEC 27002 standards, and the information assets to be evaluated are determined. Then, the functional tree model is used to associate functions with assets, establish the hierarchical structure of the system information security evaluation and assign sub-functions And the criticality of subordinate assets. At last, the judgment data of each sub-asset is fused by evidence reasoning algorithm to reduce the fuzziness of information produced by different experts. The examples show that the established framework and evaluation methods have some significance for improving the information security of WAMS system, and the framework can also be applied to other aspects of power security assessment.