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This paper presents a new asymmetrical single-phase multilevel inverter topology capable of producing nine-level output voltage with reduce device counts. In order to obtain the desired output voltage, dc sources are connected in all the combination of addition and subtraction through different switches. Proposed topology results in reduction of dc source, switch counts, losses, cost and size of the...
Space vector pulse width modulation (SVPWM) is widely used because of their easier digital realization and better DC bus utilization and lower THD. Various types of SVPWM strategies exist. The hybrid SVPWM strategy considers various SVPWM sequences and places the best performance sequence for a given reference vector and it proves to be superior in comparison with the conventional strategies. This...
In this paper a generalized formulation for Selective Harmonic Mitigation Pulse Amplitude Modulation (SHM-PAM) has been presented to control Cascaded H-bridge (CHB) inverter with non-equal DC sources. Consistent with the proposed SHM-PAM technique, switching angles are attained constant while the calculated magnitudes of DC sources vary linearly for all modulation indexes (ma). In fact, in the SHM-PAM,...
Considering the ongoing paradigm shift of large scale solar plants from central inverters to multistring inverters, new associated logistic requirements have highlighted the need to lower the weight of power converters without compromising efficiency and reliability. To meet this need, Silicon carbide based semiconductors are considered an enabling technology as they allow weight reduction in power...
In this paper, a three-phase five level inverter with new balancing algorithm is proposed using Selective Harmonics Elimination PWM. The inverter is fed photovoltaic generator as dc source. 36 redundant vectors are making use for the 12 unbalance cases of four capacitor voltages instead of 24 cases presented in the previous works. The obtained results show that the frequency of the PWM is unchanged.
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