基于模糊理论与证据推理方法的断路器状态评估模型

Circuit breaker state assessment model based on fuzzy theory and evidence reasoning method

基于模糊理论与证据推理方法提出一个新的断路器评估模型,该评判模型根据影响断路器状态的某些特性进行综合评估。利用层次分析法确定常权权重,并根据变权原理变换权数,通过模糊理论确定隶属函数,依据隶属函数确定断路器各指标的证据基本信任度分配,在此基础上应用证据推理的合成规则方法进行最终评估。最后对模型的有效性进行验证,实验结果表明,该方法可以对断路器的状态进行正确评估,比单一使用模糊理论算法更加准确。

A new circuit breaker evaluation model based on fuzzy theory and evidence reasoning method is presented, and performs the comprehensive evaluation according to some characteristics affecting on the circuit breaker state. The analytic hierar- chy process is used to determine the constant weight, and transform the weight according to the Variable weight principle. And then the membership function is determined with the fuzzy theory to conform each indicator of the circuit breaker, and distribute the basic credibility. On this basis, the synthesis rule method of the evidence reasoning is used to evaluate the circuit breaker state. The validity of the model was verified. The experimental results show that the method can evaluate the state of the circuit breaker correctly, and is more accurate than the method of using the fuzzy theory only.