This article deals with a double-stage photovoltaic (PV) grid-tied three-phase system with a higher order passive filter. It gives a solution to some real issues, such as load balancing, harmonics compensation, reduced filter size, and power loss, in the distribution network. The improved adaptive damped circular current limit (ADCCL) control -filter-based technique is used for harmonics elimination in this system. The maximum power is tracked from a PV array by an incremental conductance maximum power point tracking algorithm. However, the boost converter is used for extracting the maximum power from the PV array and feeds it to the grid and a proportional–integral controller used to maintain the dc-link voltage of the voltage-source converter. The ADCCL control is used to mitigate the power quality issues with the grid current total harmonic distortion below 5%. A feed-forward term of PV array is added with total active component, which improves the dynamic response. The power quality issues are mitigated and demonstrated by the test results. Moreover, the comparison is made with different controls under various dynamic conditions.

中文翻译：

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光伏并网系统的自适应阻尼环形电流限制控制

本文涉及带有高阶无源滤波器的双级光伏 (PV) 并网三相系统。它为配电网络中的一些实际问题提供了解决方案，例如负载平衡、谐波补偿、减小的滤波器尺寸和功率损耗。改进的自适应阻尼循环电流限制 (ADCCL) 控制基于滤波器的技术用于该系统中的谐波消除。通过增量电导最大功率点跟踪算法从 PV 阵列跟踪最大功率。然而，升压转换器用于从光伏阵列中提取最大功率并将其馈送到电网和一个比例积分控制器，用于维持电压源转换器的直流母线电压。ADCCL 控制用于缓解电网电流总谐波失真低于 5% 的电能质量问题。光伏阵列的前馈项加上总有功分量，改善了动态响应。测试结果可以缓解和证明电能质量问题。此外，还对各种动态条件下的不同控制进行了比较。