CAJ | 학술논문

从故障暂态信号中准确地提取出工频分量对于继电保护十分重要。最小二乘矩阵束算法采用衰减指数和模型，可以有效消除各类谐波及衰减直流分量的影响。文中通过仿真研究了采样频率、时间窗及模型阶数等关键参数选取对最小二乘矩阵束算法的影响。同时，分析了滤波器及数据采样对算法的影响。最后，在1个工频周期下与傅氏算法进行对比，仿真结果表明最小二乘矩阵束算法具有较高的计算精度。
종고장잠태신호중준학지제취출공빈분량대우계전보호십분중요。최소이승구진속산법채용쇠감지수화모형，가이유효소제각류해파급쇠감직류분량적영향。문중통과방진연구료채양빈솔、시간창급모형계수등관건삼수선취대최소이승구진속산법적영향。동시，분석료려파기급수거채양대산법적영향。최후，재1개공빈주기하여부씨산법진행대비，방진결과표명최소이승구진속산법구유교고적계산정도。
Quick and accurate extraction of the power-frequency phasor from transient fault signals is crucial for relay protection.Using the sum of damping exponents to approximate the original signal,the least-square matrix pencil algorithm can avoid the impact of decaying DC components and fractional harmonics.This paper studies the influence of the sample frequency,the length of data window and model order on the least-square matrix pencil algorithm and analyzes the influence of filters and data sampling on the algorithm.Finally,compared with the Fourier algorithm in one cycle,the least-square matrix pencil algorithm is found to be more accurate.