WSEAS Transactions on Systems
Print ISSN: 1109-2777, E-ISSN: 2224-2678
Volume 23, 2024
Robust Controller for Limit Cycle Elimination of Two Input DC-DC Converter with Constant Power Load in Dc µGrid Applications
Authors: , , ,
Abstract: Direct Current (DC) µgrid is gaining more attention than Alternating Current (AC) µgrid, because of their simplicity in structure, which raises the utilization of dc power sources. However, for proper operation of dc µgrids, dc-dc power converters are required. MIMO converter systems are more commonly used in µgrid applications because of their vast benefits over SISO converter systems. The power converter operates under the previous state of tight control regulation which acts as constant power loads (CPL). Most loads in dc µgrid are CPLs, hence, one of the prime challenges in dc µgrid with CPLs is, an exhibition of negative incremental impedance (NII) which causes limit cycle behavior in the system. which tends to undesirable operations of the upstream converter and dc µgrid. The proposed double integral sliding mode controller (DISMC) control technique is designed to control and eliminate the dc µgrid bus voltage variations due to uncertainties of load and CPLs limit cycles. This control technique guarantees fast trainset response over system uncertainties and CPLs limit cycles. To validate the robustness of the proposed DISM controller, it is designed and simulated in a MAT lab environment.
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Keywords: Dc µgrids, dc-dc two input power converter, CPLs, DISMC, INI, Limit cycle of CPLs, nonlinear loads
Pages: 196-205
DOI: 10.37394/23202.2024.23.22