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Rule-based adaptive control strategy for grid-forming inverters in islanded power systems for improving frequency stability

Gouveia, J. ; Moreira, C.L. ; Lopes, J. A. Peças

Electric power systems research, 2021-08, Vol.197, p.107339, Article 107339 [Periódico revisado por pares]

Amsterdam: Elsevier B.V

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  • Título:
    Rule-based adaptive control strategy for grid-forming inverters in islanded power systems for improving frequency stability
  • Autor: Gouveia, J. ; Moreira, C.L. ; Lopes, J. A. Peças
  • Assuntos: Adaptive control ; Alternative energy ; Batteries ; Disturbances ; Electric power distribution ; Electricity distribution ; Energy storage ; Frequency stability ; Grid-forming inverter ; Islanded power systems ; Parameters ; Power converters ; Renewable energy sources ; Self-adaptive control ; Simulation ; Storage systems ; Synchronous machines ; Thermal energy ; Transient stability ; Virtual synchronous machine
  • É parte de: Electric power systems research, 2021-08, Vol.197, p.107339, Article 107339
  • Descrição: •Analysis of the interactions between existing synchronous units and grid-forming type converters during short-circuits.•An optimal grid-forming control parameter tuning procedure considering different disturbances is presented, aiming to reduce the associated battery energy storage system power regulating effort following the disturbances.•Identification of a novel rule-based adaptive control solution to switch between different sets of control parameters used in grid-forming type converters depending on the network status following a fault-type disturbance. Operating isolated power systems with increasing shares of renewable energy sources requires the integration of battery energy storage systems in order to assure enhanced frequency regulation capabilities. The control mode of power converters interfacing battery energy storage systems to the grid can be based on grid-forming type structures given its superior performance with respect to the mitigation of network frequency disturbances. Nevertheless, in case of network faults, the interactions between existing synchronous units and the grid-forming type converters may adversely affect the global system behavior. Therefore, this paper addresses the study-case of a MW-scale isolated power system with large shares of converter-interfaced renewable generation, operating with both synchronous machines and a grid-forming type power converter. An optimal grid-forming control parameter tuning procedure considering different disturbances is presented, aiming to reduce the associated battery energy storage system power regulating effort following the disturbances. Moreover, it is proposed and discussed the need of a novel rule-based adaptive control solution to switch between different sets of control parameters used in grid-forming type converters depending on the network status following a fault-type disturbance. Extensive numerical simulations performed over different operating scenarios illustrate the performance of the proposed solution.
  • Editor: Amsterdam: Elsevier B.V
  • Idioma: Inglês
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