Linear power flow formulation for low-voltage DC power grids
Universidad Tecnológica de Bolívar
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This paper presents a reformulation of the power flow problem in low-voltage dc (LVDC) power grids via Taylor's series expansion. The solution of the original nonlinear quadratic model is achieved with this proposed formulation with minimal error when the dc network has a well defined operative conditions. The proposed approach provides an explicit solution of the power flow equations system, which avoids the use of iterative methods. Such a characteristic enables to provide accurate results with very short processing times when real operating scenarios of dc power grids are analyzed. Simulation results verify the precision and speed of the proposed method in comparison to classical numerical methods for both radial and mesh configurations. Those simulations were performed using C++ and MATLAB, which are programming environments commonly adopted to solve power flows. © 2018 Elsevier B.V.
This work was supported by Universidad Tecnológica de Bolivar , Universidad Tecnológica de Pereira , Instituto Tecnológico Metropolitano , Universidad Nacional de Colombia and COLCIENCIAS under the research projects P-17211 and UNAL-ITM-39823 and the Doctoral Scholarship 727-2015. Moreover, this work was also supported by the PhD program in Engineering of the Universidad Tecnológica de Pereira and the Ph.D. program “Doctorado en Ingeniería – Línea de Investigación en Automática” of the Universidad Nacional de Colombia.
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