黄奂,卢泉,黄阳,陈邕安.基于奇异值分解和总体最小二乘-旋转矢量不变技术的电力系统基波频率测量方法[J].电测与仪表,2014,51(16):. Huang huan,lu quan,huang yang,chen yong an.A Method to Measure Fundamental Frequency of Power SystemBased on Singular Value Decomposition and TLS-ESPRIT[J].Electrical Measurement & Instrumentation,2014,51(16):.
基于奇异值分解和总体最小二乘-旋转矢量不变技术的电力系统基波频率测量方法
A Method to Measure Fundamental Frequency of Power SystemBased on Singular Value Decomposition and TLS-ESPRIT
This paper proposes a method for measuring the fundamental frequency of power system. First, the valid order of the reconstructed signal is determined by the increment of singular entropy and its incremental differential. Then, the grid voltage signal is reconstructed through the reverse process of singular value decomposition. By this way, the fundamental signal is extracted, the noise and the disturbance is eliminated. Finally, the fundamental frequency of power system is calculated by TLS-ESPRIT. The result of simulation tests proves that the method is effective, the value of the fundamental frequency is estimated more accurately, in the cases such as noise, frequency offset, harmonic with instantaneous impulse, harmonic with oscillatory transients.
