Revised topology and control strategy of three-phase cascaded bridgeless rectifier

Wang, Cong; Zhuang, Yuan; Kong, Jiayi; Tian, Changgeng; Cheng, Hong

doi:10.1109/iecon.2017.8216255

Cited by 8 publications

(9 citation statements)

References 6 publications

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“…DC-AC inverter of the output stage is not studied in this paper. Figure 2 describes the average mathematical model of a single-phase cascaded SST, which is established according to [11][12][13]. All variables in Figure 2 are average values in a switching period.…”

Section: Power Characteristics Analysis Of Cascaded Sstmentioning

confidence: 99%

“…An additional circuit is needed in the hardware method [10,11], which increases the cost and the complexity of control. In contrast, the software method, which includes inphase and interphase DC voltage balancing control methods, is more practical.…”

Section: Introductionmentioning

confidence: 99%

“…In most of the previous research [19][20][21][22][23][24], DC voltage balancing of cascaded H-bridges system and power/current sharing of paralleled DAB modules system are controlled separately to balance DC voltage and DAB module power, which is called independent control for each stage in this paper. In [10][11][12], different inphase DC balance control methods are proposed for single-phase cascaded H-bridges, while current/power sharing strategy is used for paralleled DAB modules with additional current sensors. Wang et al [14] proposed a zero-sequence compensation strategy based on three-phase dq decoupled current controller for cascaded SST with star configuration.…”

Section: Introductionmentioning

confidence: 99%

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A coordinated DC voltage control strategy for cascaded solid state transformer with star configuration

Ji¹,

Sun²,

Jin³

et al. 2019

Turk J Elec Eng & Comp Sci

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Cascaded solid-state transformer (SST) can be directly connected to the high-voltage distribution grid, and it has broad applications in the future smart grid, traction locomotive, and renewable energy integration. However, the reliability of the cascaded SST is seriously influenced by the DC voltage and power imbalance issues with this configuration. This paper presents a coordinated DC voltage control strategy for cascaded SST with star configuration, in which the average DC voltage and the balancing DC voltage are controlled separately without current sensors in dual active bridge (DAB) modules. This strategy not only reduces the cost and the complexity of the control system but also realizes the unbalanced reactive compensation to some extent. Simulation and experimental results verify the feasibility and validity of the proposed method.

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Section: Power Characteristics Analysis Of Cascaded Sstmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A coordinated DC voltage control strategy for cascaded solid state transformer with star configuration

Ji¹,

Sun²,

Jin³

et al. 2019

Turk J Elec Eng & Comp Sci

View full text Add to dashboard Cite

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“…It's worth mentioning that three-phase multilevel unidirectional rectifier is more attractive since the number of power modules for three-phase multilevel rectifier is tripled in comparison with that of single-phase multilevel rectifier under the same voltage rating [12], [13]. Therefore, TMBR was proposed in [12] and its topology is depicted in Fig.2.…”

Section: Introductionmentioning

confidence: 99%

Hybrid Control Scheme for Three-Phase Multilevel Unidirectional Rectifier Under Unbalanced Input Voltages

et al. 2019

Self Cite

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In this paper, a hybrid control scheme for three-phase Y-connected multilevel bridgeless rectifier (TMBR) under unbalanced input voltages is presented, based on the mathematical model of the TMBR topology, with the emphasis on the discussion for power fluctuation suppression, dc-link capacitor voltages balancing and input current zero-crossing distortion elimination. With the hybrid control scheme, the power fluctuation can be suppressed and three-phase input currents can flow with a purely sinusoidal waveform, besides, three-phase dc-link capacitor voltages can be controlled to be equal to each other under unbalanced input voltages. Moreover, the proposed hybrid control scheme is applicable to all other threephase three wire multilevel unidirectional rectifiers under unbalanced input voltages. The validity of the proposed control scheme is demonstrated by the mathematical deduction. The simulations and experimental results verify that, with the proposed control scheme, TMBR can stably operate not only under balanced input voltages but also under unbalanced input voltages. INDEX TERMS Three-phase multilevel bridgeless rectifier, hybrid control scheme, unbalanced input voltages.

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“…This study aims for an OCF diagnosis and tolerance method for bridgeless-based rectifiers [21][22][23], especially the 3-BLC. The contribution of this paper is to propose a fault feature extraction method for 3-BLC, and a fault tolerant method based on an extra two switches.…”

Section: Introductionmentioning

confidence: 99%

Open Circuit Fault Diagnosis and Fault Tolerance of Three-Phase Bridgeless Rectifier

et al. 2018

Self Cite

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Bridgeless rectifiers are widely used in many applications due to a unity power factor, lower conduction loss and high efficiency, which does not need bidirectional energy transmission. In this case, the potential failures are threatening the reliability of these converters in critical applications such as power supply and electric motor driver. In this paper, open circuit fault is analyzed, taking a three-phase bridgeless as an example. Interference on both the input and output side are considered. Then, the fault diagnosis method including detection and location, and fault tolerance through additional switches are proposed. At last, simulation and experiments based on the hardware in loop technology are used to validate the feasibility of fault diagnosis and fault tolerance methodology.

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Revised topology and control strategy of three-phase cascaded bridgeless rectifier

Cited by 8 publications

References 6 publications

A coordinated DC voltage control strategy for cascaded solid state transformer with star configuration

A coordinated DC voltage control strategy for cascaded solid state transformer with star configuration

Hybrid Control Scheme for Three-Phase Multilevel Unidirectional Rectifier Under Unbalanced Input Voltages

Open Circuit Fault Diagnosis and Fault Tolerance of Three-Phase Bridgeless Rectifier

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