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Voltage unbalancing reduction in a stand-alone ac-dc hybrid microgrid based on floating compensation reference | ||
International Journal of Industrial Electronics Control and Optimization | ||
مقاله 32، دوره 3، شماره 3، پاییز 2020، صفحه 235-247 اصل مقاله (3.03 MB) | ||
نوع مقاله: Research Articles | ||
شناسه دیجیتال (DOI): 10.22111/ieco.2020.31615.1209 | ||
نویسندگان | ||
seyed hossein tabatabaei1؛ Hussein Eliasi ![]() | ||
1Faculty of Electrical and Computer Engineering, University of Birjand, Birjand, Iran | ||
2University of Birjand | ||
3Department of Electrical Engineering -Center of Excellence for Power System Automation and Operation - Iran University of Science and Technology | ||
چکیده | ||
A hybrid AC-DC microgrid consists of an AC and a DC subgrid that are connected to each other through an interlinking converter (IC). The main function of an IC under islanded conditions is to transfer power between the two subgrids. In this paper, a scheme is presented to reduce the voltage unbalance factor in a hybrid AC-DC microgrid by using the free capacity of the IC. The free capacity of this converter is determined based on the current passing through each leg, and the amount of voltage unbalance compensation on the AC side of the microgrid is then obtained. The reference current of voltage unbalance compensation is calculated by using the positive, negative, and zero sequence components of the voltage of IC terminals. The total reference current is obtained by adding the reference current of voltage unbalance compensation and the current calculated for power transfer. Furthermore, a proportional-resonant (PR) controller is used in the control system of the four-leg inverter. Therefore, the reference current is properly tracked by the power stage of the inverter. Simulation results verify the accuracy of the proposed scheme under different conditions. | ||
کلیدواژهها | ||
hybrid AC-DC microgrid؛ power quality؛ voltage unbalance؛ interlinking converter | ||
آمار تعداد مشاهده مقاله: 131 تعداد دریافت فایل اصل مقاله: 140 |