Alocação otimizada de dispositivos de controle e proteção em redes de distribuição

Silva, Luis Gustavo W. da; Pereira, R. Araujo; Mantovani, José Roberto Sanches

doi:10.1590/s0103-17592010000300007

Cited by 7 publications

(6 citation statements)

References 14 publications

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“…Unlike the crossover process, the mutation rate increases as similar individuals in the population increase. In this case, the factors 𝑘 and 𝑘 exchange their positions and the superscript m is employed, representing the mutation parameters (28).…”

Section: Genetic Algorithmmentioning

confidence: 99%

Optimal Coordination of Protection Devices in Distribution Networks With Distributed Energy Resources and Microgrids

Reiz

Leite

2022

IEEE Access

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Microgrids are promising to enhance power distribution systems' efficiency, quality, sustainability, and reliability. However, microgrids operation can impose several challenges to traditional protection schemes, like changes in the power flow direction and an increase in short-circuit currents. Microgrids can include several distributed generation technologies with different behaviours during shortcircuit conditions, requiring additional protection schemes and devices. In this way, the optimized coordination of reclosers and fuses in distribution networks with directional overcurrent relays, which operate as interconnection devices, might overcome many imposed protection challenges. Regarding to different generation technologies, voltage-restrained overcurrent relays and frequency relays are presented as local microgrid protection for rotative and inverter-based distributed generators, respectively. The optimized coordination of these protection devices maximizes microgrid benefits and minimizes operation drawbacks by reducing interruptions impacts and energy not supplied to consumers. This work proposes, thus, a mathematical model for the optimal coordination of protection devices in distribution networks with distributed energy resources operating in grid-connected and islanded modes. The minimization technique of operating times using an elitist genetic algorithm with variable crossover and mutation processes is proposed, as well. The results show adequate coordination using passive and low-cost protection devices.

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Section: Genetic Algorithmmentioning

confidence: 99%

Optimal Coordination of Protection Devices in Distribution Networks With Distributed Energy Resources and Microgrids

Reiz

Leite

2022

IEEE Access

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“…En [10] presentan una metodología para localización de dispositivos de protección a través de un modelo no lineal con una función objetivo denominada índice de restauración, la cual permite simplificar el problema; emplean como técnica de solución un algoritmo genético y evalúan el desempeño de la metodología con un sistema de distribución real.…”

Section: Descripción General Del Problemaunclassified

Nuevo enfoque para la localización óptima de reconectadores en sistemas de distribución considerando la calidad del servicio y los costos de inversión

Isaza

Echeverri

2016

Ingeniare. Rev. chil. ing.

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Nuevo enfoque para la localización óptima de reconectadores en sistemas de distribución considerando la calidad del servicio y los costos de inversiónA new approach to optimal allocation of reclosers in distribution systems considering service quality and fixed costs RESUMENEn este artículo se presenta una nueva metodología para la ubicación óptima de reconectadores en sistemas de distribución de energía eléctrica. La metodología considera en forma simultánea la instalación de reconectadores normalmente cerrados y abiertos, destinados al aislamiento de fallas y restauración del servicio, respectivamente. El problema es descrito por un modelo matemático multi-objetivo, donde la primera función objetivo minimiza el nivel de energía no servida del sistema (NENS) y la segunda los costos de inversión del proyecto. El conjunto de restricciones considera criterios operativos del sistema. Como estrategia de solución se introduce el concepto de áreas operativas, las cuales disminuyen esfuerzos computacionales al considerar que el NENS por área permanece constante. En la solución del problema se emplea un algoritmo elitista de ordenamiento no dominado (NSGA-II). Los resultados obtenidos reflejan la validez de la metodología propuesta y su posibilidad de aplicación a sistemas de distribución reales.

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“…The protection system's central function, besides protecting the network elements, is to ensure that a minimal portion of the network is affected by a contingency. The insertion of several protection devices in series despite increasing the network's reliability leads to the increase of the substation's protection response time, which is contrary to the need for a high-speed action to ensure the grid's equipment safe operation (Silva, 2002). Thus, the insertion of protection devices at strategic points of the DS becomes safely and economically more feasible than to install multiple elements in series throughout the system.…”

Section: Introductionmentioning

confidence: 99%

Modeling and Validation of a Directional Overcurrent Relay as an Island Interconnection Device

Faria

Souza

Otto

et al. 2020

Anais Do Simpósio Brasileiro De Sistemas Elétricos 2020

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The growing number of decentralized generators in the distribution systems and the consequent increase in the penetration level in the networks have prompted the inclusion of this scenario in researches involving the planning of electrical power systems. The planning of protection systems for distribution networks considering distributed generators requires adaptations in the approach due to modifications in characteristics of the network, such as passivity and unidirectional power flow. Furthermore, the insertion of generators in distribution networks allows the implementation of new operation methods, such as the possibility of disconnecting some loads from the main feeder and supplying them through distributed generators. The island operation can improve the service continuity indexes, as well as reduce the costs of non-supplied energy. Although the island operation is widely proposed in the literature as a means to improve the system's reliability, the simulation of a protective device to intentionally island a region and the verification of its limitations is not. In this paper, we present the modeling of a directional overcurrent relay through ATP-EMTP, and its employment as a device for island interconnection, analyzing its zone of non-operation. CIGRE 14-bus test system is used to conduct short-circuit tests with the variation of resistance and type of fault applied. Theresults show the effectiveness of the device, which is able to identify all faults with real impact on the network, placing the region in island operation in less than 20 ms.

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Alocação otimizada de dispositivos de controle e proteção em redes de distribuição

Cited by 7 publications

References 14 publications

Optimal Coordination of Protection Devices in Distribution Networks With Distributed Energy Resources and Microgrids

Optimal Coordination of Protection Devices in Distribution Networks With Distributed Energy Resources and Microgrids

Nuevo enfoque para la localización óptima de reconectadores en sistemas de distribución considerando la calidad del servicio y los costos de inversión

Modeling and Validation of a Directional Overcurrent Relay as an Island Interconnection Device

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