Current Harmonic Reduction Based on Space Vector PWM for DC-Link Capacitors in Three-Phase VSIs Operating Over a Wide Range of Power Factor

Nishizawa, Koroku; Itoh, Jun‐ichi; Odaka, Akihiro; Toba, Akio; Umida, Hidetoshi

doi:10.1109/tpel.2018.2859763

Cited by 35 publications

(16 citation statements)

References 20 publications

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“…The impact of grid impedance, grid unbalanced voltage, filter topology, and PWM technique of an ASD on the 0-9 kHz current harmonics have been studied in [12]- [17]. Authors in [12] have investigated the current harmonics at the input of an ASD under unbalanced grid voltage.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, that study has shown that the effect of grid inductance on the function of rectifier switches might change the amplitude of generated current harmonics. Authors in [17] have studied the impact of using different PWM strategies in ASDs on the dc-link current harmonics. They have found that reducing the fluctuation of inverter's dc-link current could decrease the degradation of dc-link capacitors.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of 0–9 kHz Current Harmonics in a Three-Phase Power Converter Under Unbalanced-Load Conditions

Moradi¹,

Yaghoobi

Zare

et al. 2021

IEEE Access

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The unbalanced condition of typical loads in industrial networks could affect the current harmonics across the dc-link in Adjustable Speed Drives (ASDs). These current harmonics could pass through the dc-link and create new current harmonics at the grid side. Thus, the effect of unbalancedload condition on the current harmonics across the dc-link needs to be considered in the design process. Moreover, new compatibility levels and emission limits will be developed for the 2-9 kHz current harmonics, so drives need to meet these new requirements in future. These current harmonics could also be significantly affected by the load power factor at the unbalanced-load condition. Due to these reasons, analysing the effect of unbalanced-load and load power factor on the current harmonics between 0 to 9 kHz across the dc-link is vital. Thus, this paper presents an analytical approach for estimating the current harmonics of the inverter at the dc side considering unbalanced-load currents. The proposed mathematical equations are then validated with experimental results. These analyses reveal that the negative-sequence current generates new harmonics across the dc-link. Additionally, the relationship between unbalanced currents at the load side and dc-link are found as a function of positive-and negative-sequence currents.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analysis of 0–9 kHz Current Harmonics in a Three-Phase Power Converter Under Unbalanced-Load Conditions

Moradi¹,

Yaghoobi

Zare

et al. 2021

IEEE Access

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show abstract

“…Among various modulation strategies for multilevel inverters, space vector pulse width modulation (SVPWM) and carrier-based pulse width modulation (CBPWM) are two main PWM methods, SVPWM attracts much attention because it provides significant flexibility to optimize switching waveforms, and is suitable for implementation in digital signal processors, wide linear modulation range, less total harmonic distortion (THD) in the spectrum of switching waveform, and higher DC voltage utilization [9], [10], what's more, the redundant switching states can be used for DC voltage balance control [11]. However, despite its significant advantages, SVPWM for more than three-level inverters is still hardly explored, due to the largely increased number of switching states and modulation sequences that accompany the higher number of levels [11], [12].…”

Section: Introductionmentioning

confidence: 99%

Equivalent Space Vector Output of Diode Clamped Multilevel Inverters Through Modulation Wave Decomposition Under Carrier-Based PWM Strategy

Liu

Lei

et al. 2020

IEEE Access

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The carrier-based PWM method (CBPWM) and the space vector PWM method (SVPWM) are two main modulation methods for diode clamped multilevel converters, and there is a certain relationship between these two modulation strategies. For general 8 segments SVPWM modulation sequence in the multilevel inverter, the inherent relationship between these two modulation methods have been researched, but the relationship between CBPWM and SVPWM in an arbitrary level sequence has not been obtained. To solve this problem, an in-depth study of the relationship between the multilevel SVPWM method and the CBPWM method has been made in this paper. By decomposing the modulation wave, and the SVPWM can be achieved by multi-modulation waves CBPWM. And the relationship between SVPWM and CBPWM in N level with an arbitrary number of segments sequence are obtained. Thus, through simple multi-modulation waves CBPWM strategy, less THD in the spectrum and higher DC voltage utilization switching sequences of multilevel inverters can be obtained. The simulation and experimental results illustrate that the relationship between CBPWM and SVPMM is correct. INDEX TERMS Space vector modulation (SVPWM), decomposing modulation wave, relationship.

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“…The impact of voltage and current harmonics on the converter and network operation and methods to mitigate these harmonics have been studied in [9–22]. The impact of high‐frequency voltage distortions on the temperature rise of a permanent magnet motor and its core losses have been studied in [9].…”

Section: Introductionmentioning

confidence: 99%

“…The open‐loop method, however, shows higher stability margin, whereas the closed‐loop method has the advantage of less‐complicated algorithm. Nishizawa et al [18] have analysed the input current harmonics of three‐phase VSI inverter and developed a novel space vector pulse width modulation to mitigate those harmonics independent of load power factor. In this method, the placement and timing of voltage space vectors are optimised to reduce the inverter current ripples.…”

Section: Introductionmentioning

confidence: 99%

Impacts of three‐phase power converter operating modes on harmonic emissions in distribution networks: harmonics emission within 2–9 kHz

Yaghoobi

Zare

2020

IET power electron.

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Current Harmonic Reduction Based on Space Vector PWM for DC-Link Capacitors in Three-Phase VSIs Operating Over a Wide Range of Power Factor

Cited by 35 publications

References 20 publications

Analysis of 0–9 kHz Current Harmonics in a Three-Phase Power Converter Under Unbalanced-Load Conditions

Analysis of 0–9 kHz Current Harmonics in a Three-Phase Power Converter Under Unbalanced-Load Conditions

Equivalent Space Vector Output of Diode Clamped Multilevel Inverters Through Modulation Wave Decomposition Under Carrier-Based PWM Strategy

Impacts of three‐phase power converter operating modes on harmonic emissions in distribution networks: harmonics emission within 2–9 kHz

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