摘要
在无干扰情况下,传统的间谐波检测方法能较好地检测出间谐波分量;而当有干扰存在时,就无法检测出间谐波。针对传统检测方法的局限性,提出一种新的间谐波检测方法,实现了在有干扰情况下对间谐波的准确检测,且检测结果具有较高的精度。该方法利用形态滤波器有效抑制噪声的特性对检测信号进行消噪处理,保留信号的主要特征分量;对消噪后的信号采用TLS-ESPRIT算法进行检测,通过特征值分解得到信号子空间,并对信号子空间进行奇异值分解确定出空间旋转矩阵,求解间谐波分量。算例仿真结果表明,所提出的方法是可行和有效的。
Aiming at the limitation of traditional inter-harmonics detection methods,an inter-harmonics detection method is proposed to realize the accurate detection of inter-harmonics with interference.The morphological filter is applied to effectively suppress the noises and retain the main characteristic components of signal.TLS-ESPRIT algorithm is used to detect the denoised signal and the eigenvalue decomposition to obtain the signal subspace,which is then treated by the singular value decomposition to determine the spatial rotation matrix.The inter-harmonic components are thus solved.The simulative results show that the proposed method is feasible and effective.
出处
《电力自动化设备》
EI
CSCD
北大核心
2010年第6期87-91,共5页
Electric Power Automation Equipment
