基于观测器的发电机功角与故障估计

摘要

A method based on observer is proposed to solve the problems of generator power angle estimation and fault diagnosis.Through the state transformation,the mathematical model can be divided into two parts with fault and no fault.Designing the observer for the fault-free part,the power angle information can be obtained through the state transformation.In the process of fault estimation,the amplitude of the fault can be estimated through extended state observer.The method based on observer is verified by the Matlab in view of power angle estimation and fault diagnosis,and this method has the characteristics of short response time and small error.%针对发电机功角与故障估计这个问题,提出一种利用观测器的方法.该方法通过对系统数学模型进行状态变换,将数学模型分为含故障与不合故障两部分.对不合故障部分设计观测器,然后经过状态变换可以得到功角信息.在故障估计过程中,通过增广误差系统设计增广观测器可以得到故障的幅值.最后通过Matlab仿真分析,验证基于观测器功角与故障估计方法的有效性,结果表明该方法具有速度快、误差小的优点.