Sampling-Time Harmonic Control for Cascaded H-Bridge Converters With Thermal Control

Márquez, Antonio J.; Monopoli, Vito Giuseppe; Leon, Jose I.; Ko, Youngjong; Buticchi, Giampaolo; Vázquez, Sergio; Franquelo, Leopoldo G.

doi:10.1109/tie.2019.2908593

Cited by 25 publications

(10 citation statements)

References 33 publications

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“…The analytical solution of (9) has been already provided by the academia [37], [38]. However, due to the nature of the problem and the formulation of the coefficients, it can be proven that the analytical expression does not always provide a valid solution into the set of real numbers and therefore, a single harmonic cancellation can not be assured.…”

Section: CMV Mitigation Using a Sampling-time Adaptive Tri-carrier Pwm Methodsmentioning

confidence: 99%

Common-Mode Voltage Mitigation Technique in Motor Drive Applications by Applying a Sampling-Time Adaptive Multi-Carrier PWM Method

et al. 2021

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Common-mode voltage (CMV) in electric drives causes leakage current causing consequently EMI problems, loss and reduction of their components' lifetime. Several solutions have been proposed which usually lead to higher cost because additional components are used. This paper is focused on the mitigation of the resulting CMV produced by the operation of the VSD by means of a specifically designed PWM method. The proposal is based on the analysis of the CMV harmonic spectrum using the Fourier analysis. The CMV mitigation is achieved by modifying the time-shift displacement of the carriers each sampling time considering a multi-carrier PWM technique. The resulting method has been evaluated in a down scaled experimental setup and it is easily implementable on mostly off-the-shelf mid-range microcontroller control platforms.

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Section: CMV Mitigation Using a Sampling-time Adaptive Tri-carrier Pwm Methodsmentioning

confidence: 99%

Common-Mode Voltage Mitigation Technique in Motor Drive Applications by Applying a Sampling-Time Adaptive Multi-Carrier PWM Method

et al. 2021

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“…SHE and SHM require obtaining a mathematical formulation of the power converter output voltage waveform. In this sense, it is possible to use the Fourier expansion series to obtain the harmonic description, commonly used for other power converter control approaches [12,13]. This mathematical tool asserts that a periodic signal can be expressed unequivocally as:…”

Section: Selective Harmonic Control Techniquesmentioning

confidence: 99%

Real-Time Selective Harmonic Mitigation Technique for Power Converters Based on the Exchange Market Algorithm

et al. 2020

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Hand-in-hand with the smart-grid paradigm development, power converters used in high-power applications are facing important challenges related to efficiency and power quality. To overcome these issues, the pre-programmed Pulse-Width Modulation (PWM) methods have been extensively applied to reduce the harmonic distortion with very low power switching losses for high-power converters. Among the pre-programmed PWM techniques, Selective Harmonic Elimination (SHE) has been the prevailing solution, but recently, Selective Harmonic Mitigation (SHM) stands as a superior alternative to provide further control of the harmonic spectrum with similar losses. However, the large computational burden required by the SHM method to find a solution confines it as an off-line application, where the switching set valid solutions are pre-computed and stored in a memory. In this paper, for the first time, a real-time implementation of SHM using an off-the-shelf mid-range microcontroller is presented and tested. The Exchange Market Algorithm (EMA), initially focused on optimizing financial transactions, is considered and executed to achieve the SHM targets. The performance of the EMA-based SHM is presented showing experimental results considering a reduced number of switching angles applied to a specific three-level converter, but the method can be extrapolated to any other three-level converter topology.

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“…To mitigate this phenomenon, the variable angle PS-SPWM is proposed. In [21]- [23], the variable angle approach is presented for the three cell CHB-MLI allowing for better harmonic performance under asymmetrical operation. For a higher number of cells, the variable angle PS-SPWM continues to apply as it can be seen from [24]- [26].…”

Section: Introductionmentioning

confidence: 99%

A Unified Confined Band PWM With Duty Cycle and Frequency Compensation for Multilevel Inverters

Mouselinos,

Syrigos,

Tatakis

2024

IEEE J. Emerg. Sel. Top. Ind. Electron.

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In real life applications the various DC voltages existing in a multilevel inverter are affected by the loading conditions and the nature of the input supply. Thus, DC-link voltages may contain low frequency ripples, and their mean values might drift away from the nominal operating point. In such cases, unwanted low frequency harmonics are present on the load voltage waveform. In this work, the unified level shifted PWM (UniLS-SPWM) is introduced, tailored to eliminate the low frequency harmonics of the load voltage, considering DC-link offset and ripple. This is achieved by employing feedforward terms to the classic LS-PWM. To fully compensate the load current waveform, regarding the high frequency ripple, the variable frequency scheme is also adopted, as it is imposed by the thorough mathematical analysis. Detailed simulations in MATLAB validate the ability of the UniLS-SPWM to provide a pure sinusoidal load voltage waveform, even in heavy unbalanced operation, or in the special case of a hybrid topology. Finally, the experimental results impose a significant improvement of the load current THD in both steady state and transient operation, rendering the proposed modulation technique a viable solution for many applications.

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Sampling-Time Harmonic Control for Cascaded H-Bridge Converters With Thermal Control

Cited by 25 publications

References 33 publications

Common-Mode Voltage Mitigation Technique in Motor Drive Applications by Applying a Sampling-Time Adaptive Multi-Carrier PWM Method

Common-Mode Voltage Mitigation Technique in Motor Drive Applications by Applying a Sampling-Time Adaptive Multi-Carrier PWM Method

Real-Time Selective Harmonic Mitigation Technique for Power Converters Based on the Exchange Market Algorithm

A Unified Confined Band PWM With Duty Cycle and Frequency Compensation for Multilevel Inverters

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