Cuello Polo, Gustavo A.

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    Diffusing the electric power transmission-distribution boundary through high DER presence
    (2019-12-05) Cuello Polo, Gustavo A.; Irizarry Rivera, Agustín A.; College of Engineering; O'Neill Carrillo, Efraín; Andrade Rengifo, Fabio; Department of Electrical and Computer Engineering; Lorenzo González, Edgardo
    The future of the electric power industry aims for a more decentralized and resilient service with stricter environmental regulations. The traditional electric system has been facing challenges due to the growing integration of distributed energy resources (DERs), the hierarchical design of the transmission and distribution systems, and inflexible generation plants which limit the renewable energy integration. Nowadays, society needs the improvements in sustainability and resiliency offered by renewable energy resources while maintaining the levels of stability and reliability the conventional grid has provided. Consequently, there is a need to harmonize conventional generation and renewable resources to facilitate and coordinate the needed electric infrastructure improvements and achieve an ideal balance between centralized generation and DERs. This thesis contributes to the study of the impact of spatially distributed Photovoltaic (PV) systems on electrical grids, considering the interplay of transmission and distribution systems. The discussion about how conventional generators would contribute to power systems reliability on the current changing electrical system is also included in this investigation. The case study focused on an isolated power system, dependent on imported fossil fuels, and with an excellent solar resource. The Puerto Rico electric power system was simulated using public data to evaluate its behavior with different levels of PV-based DERs penetration in test scenarios. Finally, this work provides recommendations for the establishment of fair and transparent operational and regulatory criteria that ensure sustainability and resiliency in power grids with increased levels of PV-based DERs.