【摘要】 提出了电网故障诊断新模型及相应求解方法。该模型以故障停电区内的可疑故障设备状态、保护和断路器实际动作状态作为优化变量,建立保护/断路器的期望状态和实际状态差异度最小以及保护/断路器实际状态和对应警报信息差异度最小等的多目标优化解析模型;对于该模型采用基于模糊优化技术的求解方法进行求解。该模型优化变量的维数,大大降低而避免陷入"维数灾";同时,因所建立模型为多目标优化模型并采用模糊优化求解技术,回避了简单加权系数法加权系数选择的困难。算例分析结果证明了所提方法的有效性。更多还原

【Abstract】 A new model of power grid fault diagnosis and its corresponding solving methodology are proposed.By taking the real-time action state of the prospective faulty equipment,the protection equipment and the circuit breaker in the blackout area as the optimization variables,a multi-objective optimization model is built based on the maximum difference between the expected state and real state of protection and circuit equipment as well as the maximum difference between the real-time state and the corresponding alarming information.Fuzzy optimization technique is adopted to achieve the optimal matching of optimization variables.The dimensions of variables are greatly reduced to get rid of the "curse of dimensionality"of other approaches.At the same time,the difficulty of choosing the weighting coefficient is avoided by using the multi-objective and fuzzy optimization technique.Finally,the efficiency of this new model is verified by case study.更多还原