摘要
分析了经典卡尔曼以及其相关的改进算法的跟踪特性,提出了一种利用拉格朗日线性插值的电压过零点法测得电网频率,再经过改进卡尔曼滤波得到高精度频率的测频算法,具有实时、快速跟踪的特点,且频率测量精确度高.最后通过Matlab软件进行实例仿真,验证了该改进算法的可行性.
After analyzing the characteristics of the classic Kalman tracking and its improved relative algorithms,a kind of frequency measurement algorithms is put forward,which obtains the grid frequency by the voltage zero-crossing method based on Lagrangian linear interpolation. Then the high accuracy frequency could be obtained by means of the improved Kalman filter algorithm.The improved algorithm is characterized by real-time,fast tracking,and high accuracy. Finally,through Matlab software instance simulation,the feasibility of the improved algorithm is proved.
出处
《上海电力学院学报》
CAS
2015年第3期247-250,254,共5页
Journal of Shanghai University of Electric Power
关键词
频率测量
线性插值
过零点法
卡尔曼滤波器
frequency measurement
linear interpolation
zero-crossing method
Kalman filter
