Operation of Grid Forming Converters as Self Excited Induction Generators Under Non-Ideal Loading Conditions

Roy Chowdhury, Vikram; Mather, Barry

doi:10.1109/APEC48139.2024.10509285

Operation of Grid Forming Converters as Self Excited Induction Generators Under Non-Ideal Loading Conditions

Conference · 02 May 2024

DOI:https://doi.org/10.1109/APEC48139.2024.10509285· OSTI ID:2368586

Roy Chowdhury, Vikram;

Self-excited induction generators offer a robust solution for power production for standalone as well as grid-connected systems. In general, self-excited induction generators require excitation capacitors which make use of the machine magnetization characteristics for voltage build up process as well as operation at a specific frequency. In this paper, a self-excited induction machine is modeled with both the electrical and mechanical dynamics. This modeled virtual machine's dynamics are utilized for voltage build up process for a standalone photovoltaic converter connected to a local load for a microgrid application. The modeled machine's parameters are used from the name plate rating from the manufacturer. However, in a microgrid the accommodation of unbalanced and/or nonlinear harmonic rich load is a necessity, therefore, in this work the virtual self-excitation capacitors of the modeled machine are varied based on the machine characteristics. With the objective of ensuring harmonic free point of common coupling voltage, the modeled virtual self-excitation capacitors are varied to accomplish change in terminal frequency and the virtual load torque is varied to obtain voltage magnitude change. To verify the efficacy, the overall system is modeled in MATLAB/Simulink and PLECS domain and most important case studies are presented.

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Research Organization:: National Renewable Energy Laboratory (NREL), Golden, CO (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Energy Efficiency Office. Advanced Manufacturing and Materials Technologies Office (AMMTO)

DOE Contract Number:: AC36-08GO28308

OSTI ID:: 2368586

Report Number(s):: NREL/CP-5D00-90031; MainId:91809; UUID:e5a10353-d89e-424d-8fb7-1918ab513f22; MainAdminId:72699

Country of Publication:: United States

Language:: English

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Lyapunov Energy Function based Control of a Soft Switching Solid State Transformer for Three-phase Standalone Application Chowdhury, Vikram Roy; Kandula, Rajendra Prasad; Divan, Deepak 2020 IEEE Energy Conversion Congress and Exposition (ECCE) https://doi.org/10.1109/ECCE44975.2020.9236395	conference	October 2020
Control of a Three-Phase Grid-Connected Inverter Under Non-Ideal Grid Conditions With Online Parameter Update Chowdhury, Vikram Roy; Kimball, Jonathan W. IEEE Transactions on Energy Conversion, Vol. 34, Issue 3 https://doi.org/10.1109/TEC.2019.2898152	journal	September 2019
Output Impedance Design of Parallel-Connected UPS Inverters With Wireless Load-Sharing Control Guerrero, J. M.; GarciadeVicuna, L.; Matas, J. IEEE Transactions on Industrial Electronics, Vol. 52, Issue 4 https://doi.org/10.1109/TIE.2005.851634	journal	August 2005
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Internal Model-Based Active Damping Strategy for a Back-to-Back Modular Multilevel Converter System for Advanced Grid Support Chowdhury, Vikram Roy; Singh, Akanksha; Mather, Barry 2022 IEEE 31st International Symposium on Industrial Electronics (ISIE) https://doi.org/10.1109/ISIE51582.2022.9831636	conference	June 2022
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Dynamic Performance of a Modular Multilevel Back-to-Back HVDC System Saeedifard, Maryam; Iravani, Reza IEEE Transactions on Power Delivery, Vol. 25, Issue 4 https://doi.org/10.1109/TPWRD.2010.2050787	journal	October 2010
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Power-Angle Synchronization for Grid-Connected Converter With Fault Ride-Through Capability for Low-Voltage Grids Mukherjee, Subhajyoti; Chowdhury, Vikram Roy; Shamsi, Pourya IEEE Transactions on Energy Conversion, Vol. 33, Issue 3 https://doi.org/10.1109/TEC.2018.2793880	journal	September 2018
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POWER TRANSMISSION AND DISTRIBUTION
grid forming converters (GFM)
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