This Paper Proposes a Decentralized and Coordinated Voltage and Frequency (V-F) Control Framework for Islanded Microgrids, with Full Consideration of the Limited Capacity of Distributed Energy Resources (DERs) and V-F Dependent Load. First, the Concept of DER Inadequacy is Illustrated with the Challenges It Poses. Then, a Decentralized and Coordinated Control Framework is Proposed to Regulate the Output of Inverter-Based Generations and Reallocate Limited DER Capacity for V-F Control. the Control Framework is Composed of a Power Regulator and a V-F Regulator, Which Generates the Supplementary Signals for the Primary Controller. the Power Regulator Regulates the Output of Grid-Forming Inverters According to the Real-Time Capacity Constraints of DERs, While the V-F Regulator Improves the V-F Deviation by Leveraging the Load Sensitivity to V-F. Next, the Static Feasibility and Small Signal Stability of the Proposed Method Are Rigorously Proven through Mathematical Formulation and Eigenvalue Analysis. Finally, a MATLAB-Simulink Simulation Demonstrates the Functionalities of the Control Framework. a Few Goals Are Fulfilled within the Decentralized and Coordinated Framework, Such as Making the Best Use of Limited DERs' Capacity, Enhancing the DC Side Stability of Inverter-Based Generations, and Reducing Involuntary Load Shedding.
B. She et al., "Decentralized and Coordinated V-F Control for Islanded Microgrids Considering DER Inadequacy and Demand Control," IEEE Transactions on Energy Conversion, Institute of Electrical and Electronics Engineers, Jan 2023.
The definitive version is available at https://doi.org/10.1109/TEC.2023.3258919
Electrical and Computer Engineering
Keywords and Phrases
coordinated V-f control; Current limiters; DER inadequacy; droop control; Inverters; Islanded microgrid; load power control; Microgrids; Regulation; Regulators; Sensitivity; Voltage control
International Standard Serial Number (ISSN)
Article - Journal
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01 Jan 2023