Overmodulation of Six-Phase Cascaded-CSI Using Optimal Harmonics Injection

Salem, Ahmed; Narimani, Mehdi

doi:10.1109/access.2023.3240575

Cited by 3 publications

(2 citation statements)

References 39 publications

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“…For aged samples, an extensive analysis of leakage current has been carried out in [27][28][29][30][31][32]. The investigation has been conducted on non-uniform and also longitudinal conditions based on experimental tests.…”

Section: Introductionmentioning

confidence: 99%

“…The observed discharges are categorized into PD (which typically occurs between water droplets) and arc discharges (which usually transpire between dry bands on the surface of SiR) based on the analysis of LC, cumulative charge, and visual examination of the emitted light [31]. The effect of pollution severity, ageing, geometrical structure, and hydrophobicity class on polymeric insulators’ LC amplitudes have been studied in [32]. The experimental tests of the insulators’ electrical properties such as leakage current and flashover voltage, after assessing the initial characteristics of insulators is necessary based on their age and supply voltage.…”

Section: Introductionmentioning

confidence: 99%

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Condition assessment criteria evaluation of asymmetric aged and fully aged silicone rubber insulators based on leakage current harmonics

Esmaieli,

Khodsuz,

Nouri

2023

IET Science Measure & Tech

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The leakage current characteristic monitoring of transmission line insulators is considered a worthy technique for insulator state prediction. In this paper, the harmonic analysis of leakage current signals has been performed to analyze the composite insulator condition. Experimental studies of asymmetrically aged, fully aged, and virgin insulators have been conducted. The effects of different aging types, pollution, and humidity on leakage current components, such as harmonics and the phase differences with the applied voltage, have been investigated. The analysis of the results shows that the effect of asymmetric aging on leakage current components is non‐linear, and this non‐linearity increases with the degree of pollution. Also, the type of insulator aging can be determined by the ratio of the third‐ and fifth‐order leakage current harmonics. For instance, the classification of insulators into virgin, asymmetrically aged, and fully aged can be determined by examining the corresponding value ranges of 0–0.5, 0.5–0.9, and > 0.9, respectively. Similarly, the phase difference values of < 15% and those > 15% indicate the clean and polluted operating conditions individually.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Condition assessment criteria evaluation of asymmetric aged and fully aged silicone rubber insulators based on leakage current harmonics

Esmaieli,

Khodsuz,

Nouri

2023

IET Science Measure & Tech

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Fault-Tolerant Control and Common-Mode Voltage Reduction for Dual Three-Phase CSIs Fed Motor Drives

Xu,

Wang,

Huang

et al. 2025

IEEE Trans. Power Electron.

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A Simplified Model Predictive Current Control Strategy for Six-phase H-bridge Inverters

Hou,

Zhang,

Wang

2024

EEENG

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Background:: The double-end H-bridge inverters can realize independent control of the stator voltage in each phase and have flexible advantages of modulation and fault tolerance; thus, they are more suitable for multi-phase fault-tolerant motor drives. However, due to the increase of voltage vectors and the coupling between the electromagnetic and non-electromagnetic quantities, the normal control strategies for traditional three-phase motor drives do not work anymore. Objective:: This paper aimed to propose a simplified model predictive current control strategy based on the vector space decomposition (VSD) and the vectors’ gradual simplification for the three-level six-phase H-bridge inverters. Methods:: Firstly, the 729 physical variables were decomposed and mapped onto the fundamental αβ subspace, harmonic xy subspace, and the zero-sequence o1o2 subspace based on the VSD. Then, to eliminate the influence of the harmonic and zero-sequence components on the control performance and make an easy digital implementation, vectors’ simplification has been proposed based on the in-depth analysis of the relationship between the voltage vectors mapped onto different subspaces and vectors’ stratification. With the simplification method, the number of voltage vectors was simplified from 729 to 12, and then the selected voltage vectors were used in the rolling optimization of the model predictive current control (MPCC) to choose the optimal one. Finally, sufficient experiments were carried out including static and dynamic conditions, different modulation index and power factor, etc., to verify the feasibility of the proposed strategy. Results:: The simulation and experimental results show that with the simplified MPCC strategy, both the static and dynamic performances are relatively good, and the THDs of the phase current under different modulations and power factors are relatively low. result: The simulation and experimental results show that with the simplified MPCC strategy, both the static and dynamic performances are relatively nice, the THDs of the phase current under different modulations and power factors are relatively low. Conclusion:: The proposed MPCC algorithm for the three-level six-phase H-bridge inverters has shown obvious improvement in solving the control problems of multi-vectors and complex redundancy issues. other: to eliminate the influence of the harmonic and zero-sequence components on the control performance and make an easy digital implementation, vectors simplification has been proposed based on the in-depth analysis of the relationship between the voltage vectors mapped onto different subplaces and vectors stratification.

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Overmodulation of Six-Phase Cascaded-CSI Using Optimal Harmonics Injection

Cited by 3 publications

References 39 publications

Condition assessment criteria evaluation of asymmetric aged and fully aged silicone rubber insulators based on leakage current harmonics

Condition assessment criteria evaluation of asymmetric aged and fully aged silicone rubber insulators based on leakage current harmonics

Fault-Tolerant Control and Common-Mode Voltage Reduction for Dual Three-Phase CSIs Fed Motor Drives

A Simplified Model Predictive Current Control Strategy for Six-phase H-bridge Inverters

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