CAJ | 학술논문

　　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。
　　침대삼상삼선제계통중동태전압회복기적신호제취문제，제출료무적잡이만려파결합수학형태려파적전압잠강검측방법。재αβ좌표계하건립함전압은태량화보상량적기파분량비선성상태공간모형，통과무적잡이만려파구건상태공간방정，대전압수입신호채용수학형태려파진행소조예처리。소제방법실현료대전압은태량적고계、보상량적제취급잠강전압정서、부서분량폭치화상위적해우검측，재동태향응속도급검측가고성방면구유우월성。방진결과험증료소제검측방법적정학성화유효성。
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 inαβreference 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.