A Simple and Efficient Power Flow for Distribution Networks

Abstract

This paper presents an efficient power flow (PF) for distribution networks (DN). The proposed PF method uses basic circuit laws in deriving the final PF expression and appears like the classical Gauss-Seidel PF algorithm of transmission systems. It possesses the advantages of forward and backward sweeps (FBS) based PF methods but avoids the FBS and formation of a Jacobian matrix. It primarily depends on a constant transformation matrix, formed only once from the network topology and feeder parameters. The transformation matrix relates the node currents with effective feeder voltage drops, and helps to compute the node voltages directly from the given set of load powers. The proposed PF was studied on 15, 33 and 69 node DNs, and the study exhibited that the performances in terms of accuracy, robustness to different r/x ratios of distribution lines and computational efficiency of the proposed method are superior to those of existing methods.

Optimized Performance and Economic Assessment for Hybrid Island Microgrid System Considering Uncertainties

“…As mentioned earlier, one of the significant gaps in the research studies is the insufficiency of linkage between techno-economic analysis and design performance optimization [20] of the hybrid island microgrid with the suitable utilization of DER [21,22], forecast generation/load demand prediction analysis [23,24], and power system uncertainty measurement. The optimized modeling and performance analysis [25], techno-economic assessment [26], and uncertainty analysis [27] of the microgrid system are the three crucial factors that need to be met in order for the hybrid microgrid to operate effectively.…”