AC locomotive conversion systems without heavy transformers: is it a practicable solution?

Marchesoni, M.; Novaro, R.; Savio, S.

doi:10.1109/isie.2002.1025955

Cited by 22 publications

(5 citation statements)

References 5 publications

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“…However, ISOP configured topologies are completely modular which leads to better reliability. Several ISOP configurations are discussed in [1]- [8]. The first category of solutions are presented in [1]- [5] which consist of active boost-rectifier followed by isolated dc-dc converter.…”

Section: Introductionmentioning

confidence: 99%

“…Several ISOP configurations are discussed in [1]- [8]. The first category of solutions are presented in [1]- [5] which consist of active boost-rectifier followed by isolated dc-dc converter. Since the rectification stage is based on boost-rectifier, hence for a given input voltage the required number of modules connected in series is entirely dependent upon the dc link voltage.…”

Section: Introductionmentioning

confidence: 99%

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Input-series-output-parallel connected converter with single-phase UPF buck-rectifier

Samanta

Chaudhary

Sensarma

2014

2014 IEEE International Conference on Industrial Technology (ICIT)

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Traditionally, in ac-supplied traction systems the available catenary voltage, 25 kV/50 Hz; 16 kV/16.7 Hz is stepped down by a line-frequency transformer, before the final rectification stage. This results in large volume and weight, as well as poor efficiency and lack of redundancy in the system. To obviate this transformer, some medium rated converters are connected in input series and output parallel (ISOP). ISOP connection of converters not only provides a light weight solution, but also provides greater reliability through redundancy due to its modular nature. In spite of low output voltage requirement for traction drives (0.5-3 kV), conventionally source current waveshaping employs active boost-rectifiers. This results in higher module count. Considering the module count and requirement of high source current quality, a new converter topology based on buck-rectifier is proposed which is amenable to connection in ISOP configuration. The control objectives, viz. upf operation at input, transient stability, equal power and input voltage sharing are achieved through a single loop controller structure. Analytical results are validated by numerical simulation and experimental results with a 2 kW (2 × 1 kW), grid connected, laboratory prototype.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Input-series-output-parallel connected converter with single-phase UPF buck-rectifier

Samanta

Chaudhary

Sensarma

2014

2014 IEEE International Conference on Industrial Technology (ICIT)

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“…EPTs have received a great deal of attention in recent years in both industry and scientific centers and many studies have been performed on their performance mechanism, structural design, parallel performance and control strategies [9]- [12].…”

Section: Introductionmentioning

confidence: 99%

“…Also, the subject of parallel performance is considered. The EPT performance is compared with that of an ordinary power transformer and an appropriate control strategy is used [12].…”

Section: Introductionmentioning

confidence: 99%

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Improving the Dynamic Performance of Distribution Electronic Power Transformers Using Sliding Mode Control

Hooshmand¹,

Ataei²,

Rezaei³

2012

Journal of Power Electronics

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These days, the application of electronic power transformers (EPTs) is expanding in place of ordinary power transformers. These transformers can transmit power via three or four wire converters. Their dynamic performance is extremely important, due to their complex structure. In this paper, a new method is proposed for improving the dynamic performance of distribution electronic power transformers (DEPT) by using sliding mode control (SMC). Hence, to express the dynamic characteristics of a system, different factors such as the voltage unbalance, voltage sag, voltage harmonics and voltage flicker in the system primary side are considered. The four controlling aims of the improvement in dynamic performance include: 1) maintaining the input currents so that they are in sinusoidal form and in phase with the input voltages so they have a unity power factor, 2) keeping the dc-link voltage within the reference amount, 3) keeping the output voltages at a fixed amount and 4) keeping the output voltages in sinusoidal and symmetrical forms. Simulation results indicate the potential and capability of the proposed method in improving DEPT behavior.

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Solid-state transformer-based new traction drive system and control

et al. 2017

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AC locomotive conversion systems without heavy transformers: is it a practicable solution?

Cited by 22 publications

References 5 publications

Input-series-output-parallel connected converter with single-phase UPF buck-rectifier

Input-series-output-parallel connected converter with single-phase UPF buck-rectifier

Improving the Dynamic Performance of Distribution Electronic Power Transformers Using Sliding Mode Control

Solid-state transformer-based new traction drive system and control

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