Campo Ossa, Daniel Darío

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    Contribution to the power-sharing control strategies for microgrids
    (2022-12-09) Campo Ossa, Daniel Darío; Andrade Rengifo, Fabio; College of Engineering; Irrizarry Rivera, Agustín A.; Orama Exclusa, Lionel R.; Aponte, Erick E.; Department of Electrical and Computer Engineering; Lorenzo González, Edgardo
    This research proposed the development of a novel mathematical approach that integrates the impact of complex impedance lines on power-sharing control strategies for microgrids. The proposed mathematical approach is based on a rotated reference frame that mitigates power coupling. The use of the reference frame allows the integration of complex line impedance into existing power-sharing strategies. A rotated droop control was proposed which, due to the use of the new reference frame, can now be based on the premise that impedance is highly inductive in a microgrid, as in classical power-sharing theory. The analysis of this model showed that it improves the power stability of the microgrid, with less deviations in the operating point of the powers, quickly recovering the desired values through the integrated rotated droop control. In addition to this, a model of a rotated virtual synchronous generator integrating the complex line impedance to the power-sharing control using the new rotated reference frame was proposed. The analysis of this proposed mathematical approach in Microgrids, compared to classical power-sharing strategies, verified that it improves transient response, power quality, stability, and performance. The two proposed controllers were experimentally implemented in physical on grid-connected mode. The controllers are developed for runs into the dSPACE Scalexio Platform, the experiments were designed and implemented on the Microgrid Lab testbed. The experimental results showed that the behavior of the proposed controller models and the experimental results coincide. Consequently, the effectiveness of the two controllers is evidenced by the improved transient response and higher decoupling in power-sharing.