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Elson N. M. Silva
Programa de Pós-Graduação em Engenharia Elétrica (PPGEE), UFMA, São Luís - MA, 65080-805
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Anselmo B. Rodrigues
Programa de Pós-Graduação em Engenharia Elétrica (PPGEE), UFMA, São Luís - MA, 65080-805
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Maria da Guia da Silva
Programa de Pós-Graduação em Engenharia Elétrica (PPGEE), UFMA, São Luís - MA, 65080-805
Keywords:
microgrids, islanding, power flow, Monte Carlo simulation, decoupling, Newton-Raphson method
Abstract
A fast decoupled power flow algorithm is proposed in this paper to calculate the frequency and voltages in islanded microgrids. The decoupling is characterized by two subproblems: Pθω and QV. The computational cost of the proposed method is minimized through the application of a stationary Newton- Raphson method. The Newton-Raphson and Fixed-Point methods were used to validate the accuracy and the computational cost of the proposed technique. This validation was carried out in a 310 nodes microgrid through a probabilistic power flow study. Uncertainties related to load forecasting error and equipment failures were modeled in the probabilistic power flow through the Monte Carlo Simulation. The tests results revealed that the proposed fast decoupled power flow achieved solutions very close to those generated by the Newton-Raphson and Fixed-Point methods, but with expressive reductions in the computational cost regarding to Newton-Raphson method.
