MSWF和稳定图理论在电压闪变检测中的应用

Applications of MSWF and Stabilization Diagram Theory in Detection of Voltage Flicker

提出一种基于多级维纳滤波器(MSWF)和稳定图的电压闪变信号检测方法。首先利用MSWF实现信号子空间的快速估计,不需要进行数据矩阵的奇异值分解,大大降低了计算量;然后利用总体最小二乘-旋转不变技术(TLS-ESPRIT)实现对闪变信号的高精度检测;结合稳定图的思想实现对信号分量个数的准确估计,更直观、可靠。Matlab仿真结果表明,该方法计算复杂度低、计算精度高、计算速度快。

The paper proposes a method for voltage flicker signal detection based on multi-stage wiener filter （MSWF） and stabilization diagram. First, the MSWF is used to rapidly estimate signal subspace. Since singular value decomposition for data matrix is no longer needed, the computation can be considerably reduced. Then, the total least squares rotation invariant technology （TLS-ESPRIT） is adopted to realize the high precision testing on flicker signal. Combined with the stabilization diagram, accurate estimates of the number of signal components can be made more directly and reliably. The Matlab simulation results show that this method has low computing complexity, high precision and fast computing speed.