摘要
传统的谐波检测方法——快速傅里叶变换存在栅栏和频谱泄露现象,因而对谐波和间谐波信号不能实现精确的检测。采用扩展Prony算法检测信号的谐波和间谐波,能一次性精确地检测到整数和非整数次谐波的相位、振幅、频率,为电力系统整次和非整次谐波检测提供了一条新的途径。数值仿真验证了该算法的有效性。
The traditional method of harmonic detection—fast Fourier transform could not be used to accurately detect harmonic and inter-harmonic due to its leakage and picket fence effects.Prony algorithm was used to detect the harmonic and inter-harmonic.It could accurately detect phases,amplitude and frequencies of integer and non-integer harmonics,which provided a new detection method for power systems.The effectiveness of the proposed al-gorithm was verified by simulation results.
出处
《低压电器》
北大核心
2011年第6期38-41,共4页
Low Voltage Apparatus
关键词
PRONY算法
谐波
间谐波
信号分析
参数辨识
Prony algorithm
harmonic
inter-harmonic
signal analysis
parameter identification
