中文摘要：

城市电力供应系统与城市公共安全关系紧密，文章分析了导致城市电力供应系统故障或事故的主要风险因素、事故类型及其风险程度，建立了城市电力供应系统公共安全风险评估体系。利用建立的风险评估体系，对某市电力供应系统的安全性进行了风险评估，同时验证了该体系在城市电力供应系统风险评估中的良好适用性。

英文摘要：

Urban power supply system has close relationship with urban public safety. In this paper the main risk factors , accident types and the risk degree of failures or accidents in urban power supply system are analyzed and it has established the public safety risk assessment system of urban power supply system. In order to show that the assessment system has good applicability in the risk assessment of urban power supply system ,the power supply system safety of one urban is assessed by using established risk assessment system.