A Framework for Occupational Risk Assessment in Power Grid Using AHP Method This study developed a occupational risk assessment indicators system of power grid enterprise, including 5 firstlevel indicators, a total of 24 secondary indicators. 5 firstlevel indicators are as the list: Dust Factors, Physical Factors, Chemical Factors, Behavior Factors and Protective Measures Factors. After two rounds of expertsxe2x80x99 consultation, the positive coefficient of experts were 95% and 100% respectively. The authority of experts coefficient was 0.90 on average. All experts coordination coefficient of two dimensions (significance and operability) range from 0.1379 to 0.8118, which is in statistically significance (P u003c 0.05). It indicated that there were well performance and high coordination on the evaluation for the indicators system. Afterwards, calculating the relative weight of each secondary indicators by AHP, according to the combined weights of the secondary indicators, the sequence of the first level indicators is as follows: Behavioral Factors, Dust Factors, Chemical Factors, Protective Factors, Physical Factors; The sequence of the Dust Factors, Physical Factors, Chemical Factors Behavioral Factors, and Protective measures factor were ranked.

Design and Application of a Case Analysis System for Handling Power Grid Operational Accidents Based on CaseBased Reasoning In recent years, power grid accidents have occurred frequently and higher requirements have been placed on their safety operation. In current safety management in the world, there is an effective practice that uses a unified standard for structuring an accident case database and based on that database, conducts quantitative analysis to cope with accident risks. However, that is not the case for power safety management. Casebased reasoning (CBR) is such a process that solves new problems based on the solutions to similar past problems. It works by matching a current problem with historical cases and solutions in a database, in order to obtain similar case solutions or inspirations. In the matching process, if necessary, such past solutions may be modified in order to better adapt to the current actual problems. Based on the CBR method, this paper proposes how to construct a case database of power grid operational accidents, provide data support for management of power grid risks and provide knowledge services for accurate grasping of grid accident development dynamics and making quick decisions to rapidly response to the emergencies. First, it designs an operational accident case database after considering the following three aspects: case features, power grid features and accident features based on safety management theory. Secondly, in terms of how to use the power grid operational accident case database, it proposed a twolevel search strategy, as well as the corresponding similarity calculation methods for different feature attributes of the case. Finally, it carried out a demonstration to verify the model by selecting four typical grid accidents. The grid database and CBR strategy proposed in this article could help Chinaxe2x80x99s power grids practice intelligent analysis of grid operational accidents and improve digitalization in safety management.