| 引用本文: | 李功新,周文俊,薛尚青,等.动态电压恢复器的无迹卡尔曼滤波检测方法[J].电力系统保护与控制,2013,41(16):127-132.[点击复制] |
| LI Gong-xin,ZHOU Wen-jun,XUE Shang-qing,et al.Detection for dynamic voltage restorer based on unscented Kalman filter[J].Power System Protection and Control,2013,41(16):127-132[点击复制] |
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| 摘要: |
| 针对三相三线制系统中动态电压恢复器的信号提取问题，提出了无迹卡尔曼滤波结合数学形态滤波的电压暂降检测方法。在αβ坐标系下建立含电压稳态量和补偿量的基波分量非线性状态空间模型，通过无迹卡尔曼滤波构建状态空间方程，对电压输入信号采用数学形态滤波进行消噪预处理。所提方法实现了对电压稳态量的估计、补偿量的提取及暂降电压正序、负序分量幅值和相位的解耦检测，在动态响应速度及检测可靠性方面具有优越性。仿真结果验证了所提检测方法的正确性和有效性。 |
| 关键词: 动态电压恢复器 电压暂降 无迹卡尔曼滤波 数学形态滤波器 稳态量 补偿量 |
| DOI：10.7667/j.issn.1674-3415.2013.16.020 |
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| 基金项目: |
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| Detection for dynamic voltage restorer based on unscented Kalman filter |
| LI Gong-xin1,2,ZHOU Wen-jun1,XUE Shang-qing3,JIANG Xiu-bo3 |
| () |
| Abstract: |
| Focusing on the signal extraction for dynamic voltage restorer in three-phase three-wire system, an advanced detection method for voltage sag based on unscented Kalman filter is presented combining with mathematical morphology filter. Nonlinear state-space model for fundamental component containing steady-state component and compensation component is established in αβ reference frame. Unscented Kalman filter is used to realize the model and mathematical morphology filter is designed to preprocess the random noise in voltage input signal. The proposed method has the functions of steady-state component estimation, compensation component extraction and decoupling detection for positive/negative sequence component amplitude and phase. Especially, the proposed method has advantages of fast response and high reliability. Simulation results verify the correctness and effectiveness of the proposed method. |
| Key words: dynamic voltage restorer voltage sag unscented Kalman filtering mathematical morphology filter steady-state component compensation component |
