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A Full State-Variable Direct Predictive Control for Islanded Microgrids With Parallel Converters

مؤلف البحث
Yu Li, Zhenbin Zhang, Cungang Hu, Mohamed Abdelrahem, Ralph Kennel, Jose Rodriguez
المشارك في البحث
تاريخ البحث
سنة البحث
2021
مجلة البحث
IEEE Journal of Emerging and Selected Topics in Power Electronics
الناشر
IEEE
عدد البحث
9
تصنيف البحث
Q1
صفحات البحث
4615-4628
موقع البحث
https://ieeexplore.ieee.org/document/9284450/authors#authors
ملخص البحث

In this work, we propose a high-quality control solution for islanded microgrids with multiparallel power converters; it uses a full state-variable direct model predictive control (FSV-DMPC) and has a simple structure. Unlike the conventional cascaded control loops, the proposed FSV-DMPC solution tracks the optimal reference generated by a robust droop loop using a unified cost function. This proposal enables the FSV-DMPC to be inserted into the entire control framework with plug-and-play capability; it is robust to parameter variations while also guaranteeing dynamics and stability. We conduct a deep analysis of the proposed approach, taking into account both the characteristics of the solution and the bounded stability of the system. Through comprehensive comparative studies with a classical double-loop linear controller, we validate that our solution achieves superior output voltage regulation during the load transients in terms of voltage error and settling time. Meanwhile, similar steady-state performances are accomplished for both methods. Finally, we verify our approach experimentally in different scenarios through a lab-constructed microgrid test bench. Experimental data confirm that the proposed approach achieves excellent steady-state and transient performances and obtains accurate load sharing.

Research Rank
International Journal