电力信号自适应滤波测量的收敛性

Study on Convergence of Adaptive Filtering Measurement for Power Signal

采用非线性系统稳定理论,对电力信号自适应滤波测量法稳定收敛性进行了分析和论证,导出其稳定收敛的约束条件,并给出自适应滤波测量法的设计方法。传统的电力稳态测量算法是开环算法,非频率同步采样和数据扰动时可造成误测。闭环的自适应滤波测量法可分析非频率同步采样、非整次谐波等造成的非周期正弦波采样数据,判别和修正采样失真,准确、可靠地实现电力系统稳态的测量。

Based on the nonlinear system theory, the stability and convergence of adaptive filtering measurement for power signals are analyzed and demonstrated to find its convergent condition and to design an appropriate adaptive filtering measurement method. Traditional steady measurement is an open-loop method and may misjudge in case of asynchronous sample and signal disturbances. The adaptive filtering measurement method is a close-loop method and it can be employed to deal with non-sin and non-period data, caused by asynchronous sample and non-integer harmonics, and to estimate and correct distortion. The adaptive filtering measurement method can be applied in accurate and reliable measurement in the steady power system.