Abstract
Harmonic reduction is one of the most important aspects of any inverter system. The presence of harmonics will not only reduce the efficiency of the inverter-based system but also influence the quality of the output power, which will challenge the size of the conductor and the ratings of switching devices. One way of doing so is to opt for a multilevel inverter. In a multilevel inverter, an increase in the number of levels will reduce the THD. Further, reduction of THD may be achieved by proper selection of triggering pulses so that the dominant orders of harmonics get eliminated. It will help abolish the requirement of the low pass filters, as needed in the case of two-level inverters. The predominant harmonics may be removed by different optimization techniques. In this research paper, a 15th-level CHMLI with asymmetrical voltages has been considered, whose optimized seven triggering pulses have been obtained by the GA method. The generation of pulses uses the direct torque control (DTC) technique of an induction motor connected to CHMLI. The simulated results indicate a reduction in the dominant individual order of harmonics, thus signifying the fruitfulness of this technique.
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Annexure I – Motor parameter
Annexure I – Motor parameter
Sl. no. | Parameter | Value | Sl. no. | Parameter | Value |
|---|---|---|---|---|---|
1 | Stator resistance | 6.03 Ω | 5 | Mutual inductance | 489.3e-3 H |
2 | Stator inductance | 489.3e-3 H | 6 | No. of poles | 4 |
3 | Rotor resistance | 6.085 Ω | 7 | Moment of inertia | 0.00488 kgm2 |
4 | Rotor inductance | 450.3e-3 H | 8 | DC voltage source (sym.) | 54Â V |
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Sharma, A., Gao, S. (2023). Simulation of GA-Based Harmonics Elimination in CHMLI Using DTC for Dynamic Load. In: Mishra, M., Kesswani, N., Brigui, I. (eds) Applications of Computational Intelligence in Management & Mathematics. ICCM 2022. Springer Proceedings in Mathematics & Statistics, vol 417. Springer, Cham. https://doi.org/10.1007/978-3-031-25194-8_11
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