Multi-megawatt drive with intercell transformers

Dawande, S.; Lentijo, Kathleen

doi:10.1109/ests.2013.6523737

Cited by 4 publications

(4 citation statements)

References 3 publications

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“…3. Therefore, Np in ( 9) and ( 10) is set as three, and these equations can be simplified to (11) and (12), respectively. In these equations, 'm' consists of 3l, 3l+1, and 3l+2, where l is an integer.…”

Section: Harmonics Analysis Of Ilpwmmentioning

confidence: 99%

“…The total output voltage (Vxf) in ( 11) is only affected by the 3l component among them. The other components, 3l+1 and 3l+2, influence the circulating voltage (Vxf_cir) in (12). Thus, 3l is the most important component to enhance the output current and reduce the size of the filter inductor, Lf, in Fig.…”

Section: Harmonics Analysis Of Ilpwmmentioning

confidence: 99%

“…One of the coupled inductors was a cyclic cascade structure [10]- [13], where the number of magnetic cores rapidly increased with an increase in the number of converters in parallel. For example, nine coupled inductors and twelve coupled inductors are required in three and four paralleled inverters, respectively [11]- [12]. These magnetic components significantly increase the size and cost of a system.…”

Section: Introductionmentioning

confidence: 99%

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Interleaved Pulse Width Modulation Based on Modified Carrier in Parallel Operation

Jung

2021

IEEE Access

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An interleaved pulse width modulation (PWM) can be employed in a parallel operation of three-phase converters because the interleaved PWM increases the equivalent switching frequency and significantly enhances the output current harmonics. However, interleaved voltage pulse patterns provoke a huge circulating current, and a coupled inductor is employed to suppress the circulating current. Therefore, this study aims to improve the harmonics of voltage and current in parallel operation with a coupled inductor. For the aim, the harmonics of the interleaved PWM have been analyzed. Based on the analysis, a new PWM strategy has been devised by modifying the interleaved carrier. The proposed PWM improves the harmonics of voltage and current. However, unintended additional device switching occurs in the proposed method. Accordingly, a cost index (CI) is defined to show the improvement in the harmonics considering the additional device switching. The validity, feasibility, and effectiveness of the proposed method have been demonstrated by using CI. As a result, the computer simulation and experimental results show that the proposed PWM has efficiently improved the harmonics in various modulation indices.

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Section: Harmonics Analysis Of Ilpwmmentioning

confidence: 99%

Section: Harmonics Analysis Of Ilpwmmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Interleaved Pulse Width Modulation Based on Modified Carrier in Parallel Operation

Jung

2021

IEEE Access

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“…Typical applications of interleaved voltage source converters (VSCs) include uninterruptible power supplies (UPS) [1], [6], variable-speed motor drive systems (VSDs) and traction power supplies [7], [8]. Due to the increase in power from a single wind turbine over the last couple of years, interleaved converters are becoming more prevalent in wind-power applications [9]- [12] and they are also used in distributed power systems with parallel sources supplying common loads [5].…”

Section: Introductionmentioning

confidence: 99%