Synchronizing methodology for shunt active power filter (SAPF) based on the resonant controller using generalized integrator (GI) in the stationary reference frame is of great interest for researchers now a day. In this paper, a phase synchronizing technique based on the complex coefficient filter (CCF) embedded with a frequency locked loop (FLL) is proposed for the fundamental active and reactive component extraction of load current and unit template generation from grid supply. The proposed CCF‐FLL–based control works effectively under varying grid frequency, distorted and unbalance grid voltage conditions to generate the reference source current at a unity power factor for proper harmonic compensation using an indirect current control method. In this work, a detailed mathematical modeling for development of control logic for CCF‐FLL is done, and its feasibility with the bode plot is also confirmed. Simulation for SAPF is performed using both CCF and CCF‐FLL–based control strategy separately to judge the performance of each. Simulation confirms that the proposed CCF‐FLL based control is capable of maintaining the source current with low total harmonic distortion (THD) as per the IEEE‐519 standard with the nonlinear load. The effectiveness of the proposed controller for desired harmonics compensation is also validated through real‐time simulation using OPAL‐RT OP4510 platform.

中文翻译：

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复系数滤波器-频率锁定环在可变电​​网频率条件下提高并联有源电力滤波器的性能

在当今的研究人员中，基于谐振控制器的并联有源功率滤波器（SAPF）的同步方法在固定参考系中使用广义积分器（GI）进行了同步。本文提出了一种基于嵌入了锁频环（FLL）的复数系数滤波器（CCF）的相位同步技术，用于负载电流的基本有功和无功分量提取以及从电网供电生成单元模板。所提出的基于CCF‐FLL的控制在变化的电网频率，畸变的电网电压和不平衡的电网条件下可以有效地工作，以使用间接电流控制方法以统一的功率因数生成参考源电流，以进行适当的谐波补偿。在这项工作中，完成了用于开发CCF-FLL控制逻辑的详细数学模型，并证实了其与波特图的可行性。SAPF的仿真是分别使用基于CCF和基于CCF-FLL的控制策略来执行的，以判断每种方法的性能。仿真证实，根据IEEE‐519标准和非线性负载，所提出的基于CCF‐FLL的控制能够以较低的总谐波失真（THD）保持源电流。通过使用OPAL-RT OP4510平台进行的实时仿真，也验证了所建议控制器对于所需谐波补偿的有效性。仿真证实，根据IEEE‐519标准和非线性负载，所提出的基于CCF‐FLL的控制能够以较低的总谐波失真（THD）保持源电流。通过使用OPAL-RT OP4510平台进行的实时仿真，也验证了所建议控制器对于所需谐波补偿的有效性。仿真证实，根据IEEE‐519标准和非线性负载，所提出的基于CCF‐FLL的控制能够以较低的总谐波失真（THD）保持源电流。通过使用OPAL-RT OP4510平台进行的实时仿真，也验证了所建议控制器对于所需谐波补偿的有效性。