Research on Multilevel-Cell Master-Slave Random PWM Selective Harmonic Elimination Inverter
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Abstract
Multilevel inverters have significant advantages in medium- and high-voltage applications, but harmonic distortion and electromagnetic interference caused by fixed-frequency modulation remain practical obstacles in engineering deployment. This paper proposes a multilevel-cell master-slave random PWM selective harmonic elimination inverter control scheme. The power stage adopts a three-unit cascaded H-bridge topology, and a master-slave hierarchical control architecture is developed to achieve DC bus voltage balancing, with simulation results showing a balancing error below 0.5%. A dual randomization mechanism combining random carrier frequency and random pulse position is then introduced to disperse concentrated harmonic energy and reduce harmonic peak amplitude by 50.5%, enabling compliance with the CISPR 11 Class A electromagnetic compatibility standard. To solve the nonlinear selective harmonic elimination equations, an improved Multi-Verse Optimizer algorithm is proposed, achieving a switching-angle convergence success rate of 96.4% and a target-order harmonic elimination rate above 97%. A joint optimization framework combining random PWM and selective harmonic elimination is further constructed to balance output total harmonic distortion, dynamic response, and robustness under varying load conditions. The final system achieves an output THD of 1.93%, dynamic response time of 38 ms, and stable performance over a wide load range. Simulation and experimental curves show close agreement, verifying the validity and engineering feasibility of the proposed strategy for harmonic suppression, electromagnetic compatibility, and high-performance power conversion systems.
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References
L. Guohua, C. Dongman, and W. Yufeng, “RPWM selective voltage harmonic elimination method for single-phase five-level MPUC inverter based on cell division,” IET Gener., Transmiss. Distrib., vol. 15, no. 20, pp. 2847–2856, 2021, doi: 10.1049/GTD2.12220.
T. S. A. Hussain, T. Almulaisi, H. Desa, et al., “Selective harmonic elimination in T-type multilevel inverter with reduced switch count using Sea-Horse Algorithm,” Sci. Rep., vol. 16, no. 1, Art. no. 13777, 2026, doi: 10.1038/S41598-026-46979-9.
S. Pani and U. Subudhi, “Selective harmonic elimination in reduced switch multilevel inverters for microgrid application,” Arabian J. Sci. Eng., pp. 1– 15, 2026, doi: 10.1007/S13369-025-11059-Z.
A. Singh, A. Kumari, R. A. Singh, et al., “A reduced switch single-source multilevel inverter with GA-based selective harmonic elimination,” Power Electron. Drives, vol. 11, no. 1, pp. 157–174, 2026, doi: 10.2478/PEAD-2026-0010.
P. Verma and N. Katal, “Optimized harmonic elimination in multilevel inverters with variable DC sources using data-driven models,” Measurement, vol. 259, Art. no. 119719, 2026, doi: 10.1016/J.MEASUREMENT.2025.119719.
Y. Zhang, Y. Liu, S. Cai, et al., “Design of multi-frequency analog transmitter of magnetic source based on selective harmonic elimination technology,” J. Phys.: Conf. Ser., vol. 1748, no. 5, Art. no. 052015, 2021, doi: 10.1088/1742-6596/1748/5/052015.
L. Guohua, W. Yibo, and F. Zhenfang, “Modified Multiverse Optimizer selective harmonic elimination for five-level modified packed U-cells inverter and analysis of motor torque ripple suppression,” Math. Probl. Eng., vol. 2022, Art. no. 8397836, 2022, doi: 10.1155/2022/8397836.
P. Tanu and P. Swapnajit, “Fault recognition and reconfiguration for three-phase five-level cascaded H-bridge multilevel inverter,” Radioelectron. Commun. Syst., vol. 65, no. 6, pp. 317–329, 2023, doi: 10.3103/S073527272206005X.
K. Tesen, H. Cortes, S. Vicuna, et al., “Groundwater parameters estimation: a hybrid approach of convolutional layers with asynchronous and distributed bio-inspired algorithms,” Eng. Appl. Artif. Intell., vol. 161, Art. no. 112098, 2025, doi: 10.1016/J.ENGAPPAI.2025.112098.
T. Di, G. Zhen, Z. Yan-cheng, et al., “Efficiency optimization of asynchronous motor with particle swarm algorithm incorporating parameter identification,” J. Phys.: Conf. Ser., vol. 2522, no. 1, Art. no. 012003, 2023, doi: 10.1088/1742-6596/2522/1/012003.
G. Changfu, Z. Rongyun, S. Peicheng, et al., “Low-speed sensorless control of permanent magnet synchronous motors via the Cauchy–Gauss hybrid mutation particle swarm optimization algorithm,” Eng. Optim., vol. 54, no. 11, pp. 1938–1962, 2022, doi: 10.1080/0305215X.2021.1965999.
P. Tanu and P. Swapnajit, “Fault recognition and reconfiguration for three-phase five-level cascaded H-bridge multilevel inverter,” Radioelectron. Commun. Syst., vol. 65, no. 6, pp. 317–329, 2023, doi: 10.3103/S073527272206005X.
K. Peeyush and A. Sudha, “Implementation of hybrid GSA SHE technique in hybrid nine-level inverter topology,” IEEE J. Emerg. Sel. Topics Power Electron., pp. 1–1, 2020, doi: 10.1109/JESTPE.2019.2963239.
V. Miguel, D. Rafael, C. Marc, et al., “Real-time adaptive selective harmonic elimination for cascaded full-bridge multilevel inverter,” Energies, vol. 15, no. 9, Art. no. 2995, 2022, doi: 10.3390/EN15092995.
M. S. Daula, M. B. Sagar, R. Muhyaddin, et al., “Single-phase hybrid multilevel inverter topology with low switching frequency modulation techniques for lower order harmonic elimination,” IET Power Electron., vol. 13, no. 17, pp. 4117–4127, 2020, doi: 10.1049/IET-PEL.2020.0620.
G. Shengyao, T. Zhou, L. Yuhui, et al., “Application research of acoustic black hole in floating raft vibration isolation system,” Rev. Adv. Mater. Sci., vol. 61, no. 1, pp. 888–900, 2022, doi: 10.1515/RAMS-2022-0235.
A. A. Shojaei, B. Najafi, and H. Vahedi, “Standalone operation of modified seven-level packed U-cell (MPUC) single-phase inverter,” Electronics, vol. 8, no. 3, Art. no. 268, 2019, doi: 10.3390/electronics8030268.
D. M. Siddique, M. S. J. Ali, S. Mekhilef, et al., “Reduce switch count based single source 7L boost inverter topology,” IEEE Trans. Circuits Syst. II, Exp. Briefs, 2020, doi: 10.1109/TCSII.2020.2988090.
M. S. Jagabar, B. Kaustubh, N. S, et al., “An improved seven-level PUC inverter topology with voltage boosting,” IEEE Trans. Circuits Syst. II, Exp. Briefs, vol. 67, no. 1, pp. 127–131, 2020, doi: 10.1109/TCSII.2019.2902908.
A. Asha, K. Khumukchamba, S. S, et al., “Design and modelling of novel asymmetric multilevel switched-capacitor inverter for PV systems,” J. Inst. Eng. (India): Ser. B, pp. 1–14, 2025, doi: 10.1007/S40031-025-01282-5.
Y. Gopal, A. Kumari, P. K. Panda, et al., “Implementation and analysis of switched-capacitor multilevel inverters in solar photovoltaic system,” Sustain. Energy Technol. Assessments, vol. 75, Art. no. 104227, 2025, doi: 10.1016/J.SETA.2025.104227.
Y. Yuanmao, C. Shikai, Z. Xianyong, et al., “Half-bridge modular switched-capacitor multilevel inverter with hybrid pulse width modulation,” IEEE Trans. Power Electron., 2020, doi: 10.1109/TPEL.2019.2963230.
R. Takahashi, T. Mamiya, S. Mochiyama, et al., “Performance evaluation of discontinuous-PWM Y-inverter AC motor drive system focusing on a wide range of motor rotation speeds,” IEICE Proc. Ser., vol. 71, p. 433, 2022, doi: 10.34385/PROC.71.C2L-B-05.
M. P, V. Rajesh, C. B, et al., “Hybrid multicarrier random space vector PWM for the mitigation of acoustic noise,” Electronics, vol. 10, no. 12, Art. no. 1483, 2021, doi: 10.3390/ELECTRONICS10121483.
“Engineering; studies from School of Computing and Electrical Engineering reveal new findings on engineering (a novel application of harmonics spread spectrum technique for acoustic noise and vibration reduction of PMSM drive),” J. Eng., 2020.
D. Chariag and L. Sbita, “Implementation of different randomized PWM schemes using Atmega328p microcontroller for EMI reduction in boost converter,” Electr. Eng., vol. 102, no. 2, pp. 1–9, 2020, doi: 10.1007/s00202-020-00934-7.
P. A. Kumar, S. G. Kumar, and D. Sreenivasarao, “Model predictive control with constant switching frequency for four-leg DSTATCOM using three-dimensional space vector modulation,” IET Gener., Transmiss. Distrib., vol. 14, no. 17, pp. 3571–3581, 2020, doi: 10.1049/iet-gtd.2019.1775.
Z. Qiu, Y. Chen, Y. Guan, et al., “Vibration noise suppression algorithm of permanent magnet synchronous motor for new energy vehicles,” Int. J. Heavy Veh. Syst., vol. 29, no. 1, pp. 48–70, 2022, doi: 10.1504/IJHVS.2022.123241.
S. S. S. M and P. D, “PSO based selective harmonic elimination PWM for cascaded H-bridge multilevel inverter,” IOP Conf. Ser.: Mater. Sci. Eng., vol. 1012, no. 1, Art. no. 012054, 2021, doi: 10.1088/1757-899X/1012/1/012054.
K. Muhammad, S. T. U, M. Z. Fahad, et al., “Selective harmonic elimination in a cascaded multilevel inverter of distributed power generators using water cycle algorithm,” Machines, vol. 10, no. 5, Art. no. 399, 2022, doi: 10.3390/MACHINES10050399.
D. M. Siddique, P. Sundararajan, M. Sahani, et al., “Design, analysis, and validation of fault-tolerant switched-capacitor based ANPC multilevel inverter topology,” Electr. Power Syst. Res., vol. 247, Art. no. 111883, 2025, doi: 10.1016/J.EPSR.2025.111883.
M. T. Ayyaz, U. S. Tabrez, M. F. Salman, et al., “Dragonfly algorithm-based optimization for selective harmonics elimination in cascaded H-bridge multilevel inverters with statistical comparison,” Energies, vol. 15, no. 18, Art. no. 6826, 2022, doi: 10.3390/EN15186826.
P. B. Ranjan, P. K. P, and P. Gayadhar, “Power quality performance evaluation of multilevel inverter with reduced switching devices and minimum standing voltage,” IEEE Trans. Ind. Informat., vol. 16, no. 8, 2019, doi: 10.1109/TII.2019.2953071.
J. Vinoth, C. Bharathiraja, and J. M. Lange, “A comprehensive review on space vector modulation techniques for neutral point clamped multilevel inverters,” IEEE Access, vol. 9, pp. 112104–112144, 2021, doi: 10.1109/ACCESS.2021.3100346.
R. Hong, L. Zhang, J. Lifton, et al., “Artificial neural network-based geometry compensation to improve the printing accuracy of selective laser melting fabricated sub-millimetre overhang trusses,” Addit. Manuf., Art. no. 101594, 2020, doi: 10.1016/j.addma.2020.101594.