Autoconnected-Transformer-Based 20-Pulse AC–DC Converter for Telecommunication Power Supply

Kalpana, R; Bhuvaneswari, G.; Singh, Bhim; Singh, Sanjeev; Gairola, Sumeet

doi:10.1109/tie.2012.2210373

Cited by 45 publications

(24 citation statements)

References 15 publications

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“…However, in simulation, the autotransformer is considered to have a finite value of leakage reactance, leading to commutation overlap. In comparison with the total magnetics ratings of conventional Δ/Y/Δ 12-pulse isolated transformer (109.6%) [6], T-connected 24-pulse autotransformer (39.9%) [7], fork-connected 18-pulse autotransformer (39.7%) [9], star-connected 24-pulse autotransformer (91.0%) [13], asymmetrical polygon 20-pulse autotransformer (45.5%) [17], and T-connected 36-pulse autotransformer (61.9%) [22] based AC-DC converters, the total ratings of magnetics of the proposed 36-pulse rectifier scheme is much less. The detailed comparison results are tabulated in Table 5.…”

Section: Performance Of the Proposed 36-pulse Rectifier Schemementioning

confidence: 99%

“…The pulse number ranges from 12-pulse to 30-pulse. Twelve-and 20-pulse AC-DC converters based on deltapolygon autotransformer for medium capacity switched mode power supply (SMPS) was presented by Kalpana et al [16,17]. The proposed transformer used both multi-phase and phaseshifting techniques for harmonic current and magnetic ratings reduction.…”

Section: Introductionmentioning

confidence: 99%

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Thirty-six pulse rectifier scheme based on zigzag auto-connected transformer

Chen

Chun-Ling

Qiu

et al. 2016

Archives of Electrical Engineering

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Abstract:In this paper, a low kilo-volt-ampere rating zigzag connected autotransformer based 36-pulse rectifier system supplying vector controlled induction motor drives (VCIMD) is designed, modeled and simulated. Detailed design procedure and magnetic rating calculation of the proposed autotransformer and interphase reactor is studied. Moreover, the design process of the autotransformer is modified to make it suitable for retrofit applications. Simulation results confirm that the proposed 36-pulse rectifier system is able to suppress less than 35 th harmonics in the utility line current. The influence of load variation and load character is also studied to demonstrate the performance and effectiveness of the proposed 36-pulse rectifiers. A set of power quality indices at AC mains and DC link are presented to compare the performance of 6-, 24-and 36-pulse AC-DC converters.

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Section: Performance Of the Proposed 36-pulse Rectifier Schemementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Thirty-six pulse rectifier scheme based on zigzag auto-connected transformer

Chen

Chun-Ling

Qiu

et al. 2016

Archives of Electrical Engineering

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“…Without the strict requirements of electric isolation, autotransformers are usually used in multi-pulse rectifier to save volumes and reduce input mains harmonics. In general, phase transformer is used to generate several sets of phase-shift voltages, not to boost or lower voltages [13][14].…”

Section: Introductionmentioning

confidence: 99%

Research of Phase-Shift Angle on the Differential Delta Auto-Connected Transformer

Wang¹,

Chen²,

Li³

et al. 2017

Proceedings of the 3rd Annual International Conference on Electronics, Electrical Engineering and Information Science (EEEIS 20

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Abstract. Using the traditional phase-shift angle, the differential delta-connected transformer is not able to boost voltage. Broadening the phase-shift angle of the autotransformer can boost its output voltage. But the greater phase-shift angle will increase the equivalent kilovolt ampere (KVA) rating as well. This paper analyzes the effect of phase-shift angle on the input currents and the equivalent (KVA) rating of the differential delta-connected transformer. A novel phase-shift angle is proposed, with which the differential delta-connected transformer is suitable to be a step-up autotransformer, meanwhile, the equivalent KVA rating of the autotransformer is still smaller than the isolated transformer. Some simulation is carried out to verify the correctness of the analyses.

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“…Kalpana et al [9] designed a polygon connected autotransformer-based 20-pulse ac-dc converter to feed SMPS of moderate rating. The ac mains current was nearly sinusoidal with low THD, and the power factor was close to unity.…”

Section: Introductionmentioning

confidence: 99%

Zigzag Connected Autotransformer-Based 24-pulse AC-DC Converter

Chen

Qiu

2015

International Journal of Emerging Electric Power Systems

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In this paper, a zigzag connected autotransformer-based 24-pulse AC-DC converter is designed, modeled and simulated to feed direct torque controlled induction motor drives. Winding arrangements and parameters of the autotransformer and interphase reactor are given. Moreover, the design procedure of the autotransformer is modified to make it suitable for retrofit applications.Simulation results indicate that the system is capable of eliminating up to 21st harmonics in the ac mains current. The effect of load variation and load character is also studied to demonstrate the performance and effectiveness of the proposed 24-pulse converters. A set of power quality indices at ac mains and dc side are presented to compare the performance of 6-, 12-and 24-pulse converters.

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Autoconnected-Transformer-Based 20-Pulse AC–DC Converter for Telecommunication Power Supply

Cited by 45 publications

References 15 publications

Thirty-six pulse rectifier scheme based on zigzag auto-connected transformer

Thirty-six pulse rectifier scheme based on zigzag auto-connected transformer

Research of Phase-Shift Angle on the Differential Delta Auto-Connected Transformer

Zigzag Connected Autotransformer-Based 24-pulse AC-DC Converter

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