A Modular Adaptive Robust Nonlinear Control for Resilient Integration of VSIs Into Emerging Modernized Microgrids

作     者：Davari, Masoud Aghababa, Mohammad Pourmahmood Blaabjerg, Frede Saif, Mehrdad 

作者机构：Georgia Southern Univ Allen E Paulson Coll Engn & Comp Dept Elect & Comp Engn Statesboro Campus Statesboro GA 30460 USA Urmia Univ Technol Dept Elect Engn Orumiyeh *** Iran Univ Windsor Fac Engn Dept Elect & Comp Engn Windsor ON N9B 3P4 Canada Aalborg Univ Dept Energy Technol DK-9220 Aalborg Denmark 

出 版 物：《IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS》 (IEEE J. Emerg. Sel. Top. Power Electron.)

年 卷 期：2021年第9卷第3期

页      面：2907-2925页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 

基　　金：U.S. National Science Foundation (NSF) via the Core Program of Energy, Power, Control, and Networks (EPCN) in the Division of Electrical, Communications and Cyber Systems (ECCS) [1902787, 1808279] Directorate For Engineering Div Of Electrical, Commun & Cyber Sys Funding Source: National Science Foundation Directorate For Engineering Div Of Electrical, Commun & Cyber Sys Funding Source: National Science Foundation 

主　　题：uncertainties disturbance observer emerging grids grid-connected voltage-source inverters (GC-VSIs) Lyapunov stability mismatched disturbances multi-infeed ac/dc (MIACDC) grids phase-locked loop (PLL) sliding mode control (SMC) 

摘      要：Nowadays, emerging modernized microgrids (MMGs) have significantly employed the voltage-source inverters (VSIs). VSIs are enabling technologies to form multi-infeed ac/dc (MIACDC) power systems integrating a variety of generation units and different loads into one coherent grid. In emerging MMGs, the frequency-dependent dynamics of multiple components affect the PQ-controlled, grid-connected VSIs (GC-VSIs), particularly when integrated into a weak network. In order to address this challenging problem, the full integration of the dynamics of the phase-locked loop (PLL) into those of GC-VSIs is accomplished in this research via an innovative modular structure to improve the VSI s performance. This action is expected to significantly reduce the effect of the ac-side dynamics on the control of GC-VSIs. In addition, there are uncertainties associated with the parameters in the system. Accordingly, mismatched disturbances and uncertainties (both matched and mismatched ones) will appear in a nonlinear dynamic problem, and therefore, from the standpoint of control theories, mismatched disturbances and uncertainties should be overcome. Satisfying them is a difficult task in control of nonlinear systems. Therefore, one of the main contributions of this work is finding an appropriate mathematical model of GCVSIs in the dq-frame for the problem under study. Afterward, in order to control both active and reactive power independently, this article presents a novel two-degree-of-freedom (2DoF) methodology with an enhanced modular design. It combines the sliding-mode control with a new sliding manifold and a disturbance observer with a new adaptation rule taking care of uncertainties and mismatched disturbances. Those disturbance signals may be generated by the PLL dynamics or voltage signals affecting the GC-VSI s dynamics. Through providing mathematical analyses (including stability assessments via various theorems using Lyapunov stability criterion), simulation results, and