用于次同步振荡模态提取的柔性原子滤波
发布时间：2019-01-03 19:00
【摘要】：针对现有次同步振荡模态提取方法在模式分辨率、动态特性和抗噪声干扰能力等方面的不足,提出一种柔性原子滤波方法。该滤波器的时频域带宽柔性可调,能根据测量需要获取较高模式分辨率和快速动态特性。该方法在次同步频带设置滤波器,每个滤波器具有相同尺度因子和带宽参数,能在次同步频带通过滤波计算获取主导模式幅值包络线和频率,再利用最小二乘法从幅值包络线中提取各模式初始振荡幅值和衰减因子,进而获取阻尼比参数。Matlab仿真算例和基于EMTDC/PSCAD的IEEE第一标准测试模型算例证明了所提方法的正确性和有效性。仿真结果证明该方法能准确辨识频谱密集的复合振荡模态,准确跟踪时变性振荡频率,且具有较好的噪声鲁棒性。
[Abstract]:A flexible atomic filtering method is proposed to overcome the shortcomings of the existing sub-synchronous oscillation mode extraction methods in the aspects of mode resolution dynamic characteristics and anti-noise interference ability. The bandwidth of the filter is flexible and adjustable in time and frequency domain, which can obtain high mode resolution and fast dynamic characteristics according to the measurement requirements. Each filter has the same scale factor and bandwidth parameter, and the envelope and frequency of dominant mode can be obtained by filtering in the sub-synchronous frequency band. Then the initial oscillation amplitude and attenuation factor of each mode are extracted from the amplitude envelope by the least square method. The Matlab simulation example and the IEEE first standard test model based on EMTDC/PSCAD show the correctness and validity of the proposed method. The simulation results show that the proposed method can accurately identify the frequency-intensive complex oscillation modes, track the time-varying oscillation frequency accurately, and have better noise robustness.
【作者单位】： 国网江苏电力调度控制中心;武汉大学电气工程学院;南京南瑞集团公司;
【分类号】：TM712
[Abstract]:A flexible atomic filtering method is proposed to overcome the shortcomings of the existing sub-synchronous oscillation mode extraction methods in the aspects of mode resolution dynamic characteristics and anti-noise interference ability. The bandwidth of the filter is flexible and adjustable in time and frequency domain, which can obtain high mode resolution and fast dynamic characteristics according to the measurement requirements. Each filter has the same scale factor and bandwidth parameter, and the envelope and frequency of dominant mode can be obtained by filtering in the sub-synchronous frequency band. Then the initial oscillation amplitude and attenuation factor of each mode are extracted from the amplitude envelope by the least square method. The Matlab simulation example and the IEEE first standard test model based on EMTDC/PSCAD show the correctness and validity of the proposed method. The simulation results show that the proposed method can accurately identify the frequency-intensive complex oscillation modes, track the time-varying oscillation frequency accurately, and have better noise robustness.
【作者单位】： 国网江苏电力调度控制中心;武汉大学电气工程学院;南京南瑞集团公司;
【分类号】：TM712
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