Abstract
Hybrid active power filters (HAPF) are effective harmonic compensation devices. However, the inductor voltage is too low, so the DC-bus voltage can not get enough power flow. Thus, the compensation performance and stability of HAPF can be reduced. Theoretically, increasing the inductor voltage can improve the DC side control performance. Therefore, the relevant mathematical model is established, and systematic analysis is carried out. To improve the performance of HAPF, a new double closed-loop control strategy is proposed. To sum up, the main variable of the outer loop control is the inductor voltage. The current flow direction can be changed by changing the value of the inductance voltage to improve the inductance voltage and realize the stability of the DC-side voltage. Secondly, from the transfer function and the Bode Plots, the introduction of the inverter output current inner loop results in significant resonant spike suppression of the system. Compared with the self-excitation control method with voltage feedforward, this new control method is easy to implement and very effective in DC-bus control. Simulation and experimental results show that the compensation effect of HAPF is improved, the DC-side voltage is stable, and the system can operate safely and reliably.
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Acknowledgements
This research was supported Natural Science Foundation of Guangdong Province (Research on Interconnection Sensing and Cooperative Control Strategy of Microgrid Based on Impedance Autonomous Matching, Grant no.2015A030313487).
Funding
Natural Science Foundation of Guangdong Province for Distinguished Young Scholars, 2015A030313487, Zhang miao.
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Wen, J., Zhang, M., Lu, J. et al. A Novel Control Strategy for Improving the Performance of Hybrid Active Power Filters. J. Electr. Eng. Technol. 18, 4269–4285 (2023). https://doi.org/10.1007/s42835-023-01496-x
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DOI: https://doi.org/10.1007/s42835-023-01496-x