Abstract
针对智能变电站继电保护运行信息日益增多的趋势，为了对其状态做出准确的评估，提出一种基于综合权重与秩和比法的状态评估方法。首先分析继电保护状态评估流程和建立评估指标体系，利用乘法组合法将层次分析法确定的主观权重和变异系数法确定的客观权重相结合，得到最终的综合权重。其次通过引入秩和比法与综合权重相结合，构成加权秩和比，对继电保护装置状态进行综合评估分档。最后以某220 kV变电站各典型间隔的继电保护为例，通过对评估结果进行最佳分档一致性检验，验证了所提方法的合理性和可行性。 In view of the tendency of increasing operation information about smart substation relay protection, in order to obtain accurate evaluation of relay protection state, an evaluation method based on comprehensive weight and rank sum ratio is raised. Firstly, to analyze the relay protection status assessment process and establish the evaluation index system, and then use the multiplicative method to combine the subjective weight determined by the analytic hierarchy process and the objective weight determined by the coefficient of variation to obtain the final comprehensive weight. Secondly, relay protection state is comprehensively evaluated and graded by combining rank sum ratio method and comprehensive weight to make up weighted rank sum ratio. Finally, taking different interval relay protections of some 220 kV substations for instance, the rationality and the feasibility of proposed method were verified through the consistency assessment of the results of the optimal grading test.
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