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- W2945976883 abstract "This paper presents an improved selective harmonic minimization (SHM)-pulse width modulation (PWM) scheme using three-phase seven-level cascaded H-bridge (CHB) inverter suitable for medium-voltage distribution systems by achieving high-quality voltage waveform with least number of switching instances (ie, each power semiconductor devices switched once in a quarter period). Here, each isolated DC voltage sources have been taken as variable and unequal for the CHB inverter. The efficacy of the proposed SHM-PWM scheme over selective harmonic elimination (SHE)-PWM scheme and existing SHM-PWM scheme has been verified through a comparative inverter performance analysis with equal number of switching instances. Both simulation and experimental results prove that the proposed SHM-PWM scheme ensures equal percentage of power-sharing between the H-bridge cells, achieves desired fundamental voltage component, minimizes each individual odd nontriplen harmonics, and limits %total harmonic distortion (THD) up to 25th-order harmonics such that, it satisfies the power quality standards CIGRE WG 36-05 and EN 50160 for the entire modulation index range. It is also seen that the proposed scheme requires least no of switching (three) than other reported SHE-/SHM-PWM schemes to meet the aforesaid power quality standards. It also results lower inverter losses and improves efficiency compared with conventional schemes. Finally, the scheme is applied to a closed-loop control of induction motor driven by back-to-back PWM-controlled converter." @default.
- W2945976883 created "2019-05-29" @default.
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- W2945976883 date "2019-05-16" @default.
- W2945976883 modified "2023-10-05" @default.
- W2945976883 title "An improved SHM‐PWM scheme for three‐phase seven‐level CHB inverter to improve power quality by fulfilling CIGRE WG 36‐05 and EN 50160 and sharing equal power between the H‐bridge cells" @default.
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- W2945976883 doi "https://doi.org/10.1002/2050-7038.12040" @default.
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