Economic Dispatch of Renewable Generators and BESS in DC Microgrids Using Second-Order Cone Optimization

Gil-González, Walter; Montoya, Oscar Danilo; Grisales-Noreña, Luis Fernando; Cruz-Peragón, Fernando; Alcalá, Gerardo

doi:10.3390/en13071703

Cited by 41 publications

(31 citation statements)

References 28 publications

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“…Este software es muy utilizado en la literatura especializada porque puede resolver problemas de optimización con múltiples variables. Algunos de los trabajos más relevantes usando este software han sido ubicación de generadores distribuidos en redes AC y DC usando variaciones de carga [18] y [19], despacho óptimo de baterías en redes AC y DC [20,21]…”

Section: Metodología De Soluciónunclassified

Estimación de parámetros entransformadores monofásicos empleandomedidas de tensión y corriente

Bocanegra¹,

Montoya²,

Molina-Cabrera³

2020

revuin

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En este artículo se presenta una metodología para la estimación de parámetros en transformadores de distribuciónconsiderando medidas de tensión y corriente mediante un modelo matemático de programación no lineal (PNL).Este modelo de programación es desarrollado a través de la aplicación de las leyes de Kirchhoff al modelo del circuitoequivalente del transformador. Para resolver el modelo de PNL resultante se emplea el sistema de modelado algebraicogeneral conocido como GAMS. La metodología de optimización propuesta se desarrolla a manera de tutorial conun ejemplo de implementación el cual corresponde a un transformador monofásico de 20 kVA y una relación detransformación de 8000/240 V. Los resultados numéricos muestran que la estimación paramétrica en transformadoresmediante el modelo de PNL propuesto representa adecuadamente el comportamiento eléctrico de estos dispositivosen relación consu funcionamiento para diferentes escenarios de carga a los que se encuentren sometidos. Todas lassimulaciones fueron realizadas con la versión 25.1.3 de GAMS licenciado por la Universidad Tecnológica de Bolívar

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Section: Metodología De Soluciónunclassified

Estimación de parámetros entransformadores monofásicos empleandomedidas de tensión y corriente

Bocanegra¹,

Montoya²,

Molina-Cabrera³

2020

revuin

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“…Power-flow analysis is an essential tool in the design and operation of alternating current (AC) and direct-current (DC) networks [1][2][3]. It employs loads that are typically modeled as constant power loads (CPLs), which generate hyperbolic non-convexities on the mathematical model that represents the power-flow problem (PF) in electrical grids [4,5].…”

Section: General Contextmentioning

confidence: 99%

A Comparative Study on Power Flow Methods for Direct-Current Networks Considering Processing Time and Numerical Convergence Errors

et al. 2020

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This study analyzes the numerical convergence and processing time required by several classical and new solution methods proposed in the literature to solve the power-flow problem (PF) in direct-current (DC) networks considering radial and mesh topologies. Three classical numerical methods were studied: Gauss–Jacobi, Gauss–Seidel, and Newton–Raphson. In addition, two unconventional methods were selected. They are iterative and allow solving the DC PF in radial and mesh configurations. The first method uses a Taylor series expansion and a set of decoupling equations to linearize around the desired operating point. The second method manipulates the set of non-linear equations of the DC PF to transform it into a conventional fixed-point form. Moreover, this method is used to develop a successive approximation methodology. For the particular case of radial topology, three methods based on triangular matrix formulation, graph theory, and scanning algorithms were analyzed. The main objective of this study was to identify the methods with the best performance in terms of quality of solution (i.e., numerical convergence) and processing time to solve the DC power flow in mesh and radial distribution networks. We aimed at offering to the reader a set of PF methodologies to analyze electrical DC grids. The PF performance of the analyzed solution methods was evaluated through six test feeders; all of them were employed in prior studies for the same application. The simulation results show the adequate performance of the power-flow methods reviewed in this study, and they permit the selection of the best solution method for radial and mesh structures.

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“…The result of this consumer behaviour is a flatter load curve, which shows that even selfish actors can be beneficial to the system if the goal is congestion relief or peak shaving. Gil-González et al [91] showed that using an ESS in a distribution grid with high penetration of RES reduces its operating costs. Nazir et al [40] explored the possibility of using ESS for loss minimisation in unbalanced distribution grids with high penetration of PV.…”

Section: Distribution System-level Essmentioning

confidence: 99%

Operating and Investment Models for Energy Storage Systems

2020

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In the context of climate changes and the rapid growth of energy consumption, intermittent renewable energy sources (RES) are being predominantly installed in power systems. It has been largely elucidated that challenges that RES present to the system can be mitigated with energy storage systems (ESS). However, besides providing flexibility to intermittent RES, ESS have other sources of revenue, such as price arbitrage in the markets, balancing services, and reducing the cost of electricity procurement to end consumers. In order to operate the ESS in the most profitable way, it is often necessary to make optimal siting and sizing decisions, and to determine optimal ways for the ESS to participate in a variety of energy and ancillary service markets. As a result, many publications on ESS models with various goals and operating environments are available. This paper aims at presenting the results of these papers in a structured way. A standard ESS model is first outlined, and that is followed by a literature review on operational and investment ESS models at the transmission and distribution levels. Both the price taking and price making models are elaborated on and presented in detail. Based on the examined body of work, the paper is concluded with recommendations for future research paths in the analysis of ESS.

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Economic Dispatch of Renewable Generators and BESS in DC Microgrids Using Second-Order Cone Optimization

Cited by 41 publications

References 28 publications

Estimación de parámetros entransformadores monofásicos empleandomedidas de tensión y corriente

Estimación de parámetros entransformadores monofásicos empleandomedidas de tensión y corriente

A Comparative Study on Power Flow Methods for Direct-Current Networks Considering Processing Time and Numerical Convergence Errors

Operating and Investment Models for Energy Storage Systems

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