改进物元模型在继电保护状态评估中的应用

摘要

为提高继电保护状态检修机制下状态评估能力,提出一种基于物元模型的继电保护状态可拓评估方法.基于可拓学物元理论,建立了继电保护状态评估的物元模型;综合改进层次分析法和熵权法各自优点,组合赋权确定指标权重值;定义新的可拓学关联函数,定量计算保护状态与各给定状态等级的关联度,按最大关联度值确定待评装置状态等级.算例分析分别从结果客观性、区分精度与模糊综合评价方法等方面进行了比较,验证了所提方法的有效性和合理性.%To enhance the state evaluation ability under the relay protection condition-based maintenance mechanism, an extension method for evaluating the relay protection condition is proposed. Based on matter-element theory,a model is established. By combining the advantages of improved analytic hierarchy process(AHP)and entropy weight method re-spectively,the combined weights and the new extended relation function are used to calculate the related degree of test-ed relay condition at different given levels,and determine the relay's condition level according to the maximum related degree. The example analysis results are compared between the proposed method and fuzzy comprehensive evaluation method,which proves the effectiveness and rationality of the proposed method.