Using variable DC sources in order to improve the voltage quality of a multilevel STATCOM with low frequency modulation

Bakhshizadeh, Mohammad Kazem; Najjar, Mohammad; Blaabjerg, Frede; Sajadi, Rahman

doi:10.1109/epe.2016.7695563

Cited by 4 publications

(1 citation statement)

References 29 publications

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“…Non-equal DC link voltages have been employed in some CHB converters [27]- [30], [40]. These techniques employ separate DC link voltages that are supplied by front-end converters.…”

Section: ) Selective Harmonic Elimination-pwm (She-pwm) 2) Selectivmentioning

confidence: 99%

Non-equal DC link Voltages in a Cascaded H-Bridge with a Selective Harmonic Mitigation-PWM Technique Based on the Fundamental Switching Frequency

Moeini¹,

Iman‐Eini²,

Najjar³

2017

Journal of Power Electronics

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In this paper, the Selective Harmonic Mitigation-PWM (SHM-PWM) method is used in single-phase and three-phase Cascaded H-Bridge (CHB) inverters in order to fulfill different power quality standards such as EN 50160, CIGRE WG 36-05, IEC 61000-3-6 and IEC 61000-2-12. Non-equal DC link voltages are used to increase the degrees of freedom for the proposed SHM-PWM technique. In addition, it will be shown that the obtained solutions become continuous and without sudden changes. As a result, the look-up tables can be significantly reduced. The proposed three-phase modulation method can mitigate up to the 50th harmonic from the output voltage, while each switch has just one switching in a fundamental period. In other words, the switching frequency of the power switches are limited to 50 Hz, which is the lowest switching frequency that can be achieved in the multilevel converters, when the optimal selective harmonic mitigation method is employed. In single-phase mode, the proposed method can successfully mitigate harmonics up to the 50th, where the switching frequency is 150 Hz. Finally, the validity of the proposed method is verified by simulations and experiments on a 9-level CHB inverter.

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“…Non-equal DC link voltages have been employed in some CHB converters [27]- [30], [40]. These techniques employ separate DC link voltages that are supplied by front-end converters.…”

Section: ) Selective Harmonic Elimination-pwm (She-pwm) 2) Selectivmentioning

confidence: 99%

Non-equal DC link Voltages in a Cascaded H-Bridge with a Selective Harmonic Mitigation-PWM Technique Based on the Fundamental Switching Frequency

Moeini¹,

Iman‐Eini²,

Najjar³

2017

Journal of Power Electronics

Self Cite

View full text Add to dashboard Cite

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DC link voltage balancing technique for cascaded H-bridge multilevel converter with selective harmonic current mitigation-PWM

Moeini

Wang

2017

2017 IEEE Applied Power Electronics Conference and Exposition (APEC)

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A DC Link Sensor-Less Voltage Balancing Technique for Cascaded H-Bridge Multilevel Converters With Asymmetric Selective Harmonic Current Mitigation-PWM

Moeini

Wang

2018

IEEE Trans. Power Electron.

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Using variable DC sources in order to improve the voltage quality of a multilevel STATCOM with low frequency modulation

Cited by 4 publications

References 29 publications

Non-equal DC link Voltages in a Cascaded H-Bridge with a Selective Harmonic Mitigation-PWM Technique Based on the Fundamental Switching Frequency

Non-equal DC link Voltages in a Cascaded H-Bridge with a Selective Harmonic Mitigation-PWM Technique Based on the Fundamental Switching Frequency

DC link voltage balancing technique for cascaded H-bridge multilevel converter with selective harmonic current mitigation-PWM

A DC Link Sensor-Less Voltage Balancing Technique for Cascaded H-Bridge Multilevel Converters With Asymmetric Selective Harmonic Current Mitigation-PWM

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