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首页> 外文期刊>Research journal of applied science, engineering and technology >Hybrid Controller for Three Level Shunt Active Power Filter to Reduce Supply Current Harmonics for Power Quality Improvement
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Hybrid Controller for Three Level Shunt Active Power Filter to Reduce Supply Current Harmonics for Power Quality Improvement

机译：用于三级并联有源电力滤波器的混合控制器，可降低电源电流谐波，从而改善电能质量

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Shunt Active Power Filter (SAPF) of electric power has become a grown-up technology for mitigating supply current harmonics and compensation of reactive power in the grid. In this study, a combined Proportional Integral (PI) and Fuzzy Logic Controller (FLC) are proposed to extract required reference current of the SAPF for balanced, unbalanced with static and dynamic conditions. The DC bus voltage of three level diode clamped multilevel PWM inverter functioning as a SAPF is maintained at stable value by regulating the current error using the conjunction of PI and FLC algorithm. Switching pulses for the multilevel inverter are generated from the sampled reference phase voltage magnitudes as in the case of conventional space vector PWM. The implementation of PI and FLC algorithm is executed using MATLAB fuzzy logic tool box. The simulation results shows that, the proposed model provides with low harmonic content in supply side and necessary reactive power is supplied to the Point of Common Coupling (PCC) thereby power factor of the system is improved in both static and dynamic conditions.
机译：电力的并联有源电力滤波器（SAPF）已成为一种成熟的技术，用于减轻电源电流谐波并补偿电网中的无功功率。在这项研究中，提出了一种组合比例积分（PI）和模糊逻辑控制器（FLC）来提取平衡，不平衡的静态和动态条件下所需的SAPF参考电流。通过结合PI和FLC算法调节电流误差，可将充当SAPF的三电平二极管钳位多电平PWM逆变器的直流总线电压保持在稳定值。与常规空间矢量PWM一样，从采样的参考相电压幅值中生成用于多电平逆变器的开关脉冲。 PI和FLC算法的实现是使用MATLAB模糊逻辑工具箱执行的。仿真结果表明，所提出的模型在供电侧具有较低的谐波含量，并且向公共耦合点（PCC）提供了必要的无功功率，从而在静态和动态条件下均提高了系统的功率因数。

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