敏感设备电压暂降敏感度模糊评估方法

提出了基于模糊理论的敏感设备电压暂降敏感度评估方法。暂降期间设备从安全到故障存在一个过渡过程，提出将这一过渡过程作为模糊极限过程，用设备隶属于安全状态的隶属度进行描述。利用能量函数作为设备隶属于安全状态的隶属函数，并结合正态分布函数刻画系统扰动和设备耐受曲线的随机分布规律。系统扰动和设备耐受曲线的概率密度函数参数分别由IEEE 30节点仿真数据及实际测试数据得到。仿真结果验证了所提方法的有效性和准确性。

Sensitivity Evaluation of Sensitive Equipment Based on FuzzyTheory Due to Voltage Sags

A new sensitivity evaluation method for sensitive equipment based on fuzzy theory due to voltage sags is proposed in this paper. The transitional process is considered as a fuzzy limit state, which is from safety to fault during voltage sags. The degree of membership which belongs to safety state is used to describe this transitional process. Energy function is used as the membership function. Normal distribution is used to describe the random process of system disturbance and tolerant capacity of equipment. The parameters of probability density function of system disturbance is calculated from the simulation data of IEEE-30, while that of tolerant capacity of equipment is calculated from the test data. Simulation results show that the method proposed is available and accurate.