| 摘要: |
| 针对四桥臂并联型有源滤波器（SAPF）的拓扑结构，将广义积分器与基于abc坐标系的三维空间矢量PWM（3-D SVPWM）相结合，提出一种新的复合控制策略。其中，广义积分器能够无稳态误差地对特定频率次谐波进行补偿；而3-D SVPWM直流侧电压利用率高，稳定性好，易于数字实现。建立四桥臂SAPF仿真模型并进行仿真分析。仿真结果表明采用所提出复合控制策略的四桥臂SAPF能有效补偿三相电网谐波、基波负序、零序及中线电流，且能对谐波进行分次补偿，兼具较快的动态响应速度和较小的稳态误差，验证了该复合控制策略的正确性和可行性。 |
| 关键词: 三相四线制 四桥臂 有源滤波器 复合控制 广义积分器 三维空间矢量PWM |
| DOI： |
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| Compound control of four-leg shunt active power filter |
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MAO Sumin1, ZHOU Juan2
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1.School of Electronic Information and Electrical Engineering，Shanghai Jiao Tong University，Shanghai 200240，China;2.School of Information and Electrical Engineering，China University of Mining and Technology，Xuzhou 221008，China
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| Abstract: |
| According to the topology of four-leg SAPF（Shunt Active Power Filter），a compound control strategy is put forward，which combines the generalized integrators with the abc-coordinates-based 3-D SVPWM（3-Dimensional Space Vector Pulse Width Modulation）. The generalized integrator compensates the specified harmonic without static error while the 3-D SVPWM has higher DC voltage utilization ratio，better DC voltage stability and easier digital realization. The simulation model of four-leg SAPF is built and analyzed，and results show that it compensates the three-phase network harmonic currents，negative-sequence fundamental current，zero-sequence fundamental current and neutral current effectually and order-specifically，with both faster dynamic response and smaller static error，which verifies its validity and feasibility. |
| Key words: three-phase four-wire four-leg active filters compound control generalized integrator 3-dimensional space vector pulse width modulation |
