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Nowadays, the reliability analysis of the power system mainly concentrates on the power transmission and transformation equipment or power delivery, but the analysis of human reliability is few. First of all, the concept of human operation reliability of power system and the basic cognitive reliability and error analysis method (CREAM) are described. In this paper, the human reliability analysis model used in nuclear industry is taken as a reference. According to power system operation characteristics and existing security related rules and regulations, the detailed rules of nine types of common performance conditions (CPC) are given. And a quantitative approach for power system operation reliability based on (CREAM) is proposed. Case analysis of switching operation in some substation under different conditions verifies the accuracy of the proposed model.
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