Self-excited induction generators are a specific form of three-phase induction generators that were frequently used for generating electricity in remote locations that had no access to the main power grid. The generator was commonly connected to different electrical loads, such as light bulbs, which were classified as resistive loads. However, because of its non-linear nature, the use of rectifiers can generate harmonic currents, leading to voltage distortion. Hence, this study performed a comparative analysis of the attributes of a self-excited three-phase generator operating with a resistive load in two different scenarios: one with the utilization of a rectifier and the other without. The PSIM software was utilized for the purpose of modeling and simulation. Three scenarios were established: generator working without any electrical load, generator connected only to a resistive load, and generator linked to a resistive load along with a rectifier. A study was undertaken to analyze distortion and found that when the output voltage was connected to a resistive load spanning from 15.29 Ω to 153 Ω, it generated a total harmonic distortion of 2.165% to 4.827%. Furthermore, the harmonic distortion of the load current, the harmonic distortion of the capacitor current, and the overall current varied from 28.965% to 30.512%, 3.684% to 16.246%, and 1.916% to 4.404%, respectively. The output harmonic distortion generated by the three-phase induction generator at rotational speeds of 1551, 1518, and 1432 rpm remained below the permissible thresholds, as specified in IEEE 519-2014.
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Umaya et al. (2024) studied this question.
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