POWER FLOW BALANCE – SIMULATIONS AND EXPERIMENTS IN ELECTRICAL NETWORKS
DOI:
https://doi.org/10.59277/RRST-EE.2025.1.9Keywords:
Distribution grid, Active power, Reactive power, Unbalanced consumers, Nonlinear consumers, Symmetrical components power theory (SCPT), Powers of symmetry, Powers of non-symmetry, Residual (distorting) powers, Waveforms, Harmonics, Numerical simulationAbstract
This paper provides a detailed analysis of the effects of electric power transfer in distorted and asymmetric regimes specific to three-phase, four-wire systems by analyzing and exposing the negative influence of nonlinear and unbalanced consumers on the other grid-connected consumers and the power line. A key aspect of this study is to investigate the impact of these regimes on the parasitic active and reactive powers, which affect linear and balanced consumers due to distorted and unbalanced loads. The quantitative evaluation of the phenomena involved is carried out through the symmetric component power theory (SCPT), introduced by Acad. Andrei Țugulea, allowing the identification of the source of the non-symmetry and residual powers. This approach is consistent with the experimental data acquired in our previous research, proving the validity of SCPT. Circuit simulation was done with SPICE software, confirming the consistency between the data acquired experimentally and those provided by the numerical simulation.
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