DC link current minimization for high power current source motor drives

Li, Yunwei; Pande, Manish; Zargari, Navid R.; Wu, Bin

doi:10.1109/pesc.2008.4592317

Cited by 12 publications

(18 citation statements)

References 28 publications

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“…The resonance in steady-state may be avoided by SHE, but when the transient events occur, the SHE has limited capability to damp the resonances [14]. The dc-link current minimization strategy for a high-power CSC was proposed in [15] to reduce system losses, where the CSI modulation index is kept at the maximum value while the current-source rectifier (CSR) is used to regulate the dc-link current. The dc-link current can be controlled by the delay angle adjustment (α control) of the CSR or by modulation index control (m a control) [16].…”

Section: System Control With Proposed Methodsmentioning

confidence: 99%

Common-mode voltage reduction for medium-voltage current source converters by optimizing switching sequences

Zhu

et al. 2013

2013 IEEE Energy Conversion Congress and Exposition

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Common-mode voltages (CMVs) can lead to premature failure of the motor insulation system in medium-voltage (MV) current source drives. This paper proposes a novel space-vector modulation (SVM) based gating strategy that can significantly reduce the peak CMV by optimizing the switching sequences for MV current source converters (CSCs). In the proposed method, the switching sequence of one side of the CSC is fixed and the sequence of the other side is selected to produce the minimum peak CMV. The optimization process is based on the CMV calculation for all the possible switching sequence combinations. To validate the proposed concept, different SVM based control schemes for CSCs are investigated. The results show the effectiveness of the proposed concept. In addition, the proposed strategy can be easily implemented in software and requires no extra hardware. By using this method, the CMV stress of the motor is reduced significantly and the size/weight for the common-mode choke can also be reduced.

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Section: System Control With Proposed Methodsmentioning

confidence: 99%

Common-mode voltage reduction for medium-voltage current source converters by optimizing switching sequences

Zhu

et al. 2013

2013 IEEE Energy Conversion Congress and Exposition

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“…This paper mainly focuses on the microgrid applications, where the voltages on both sides are generally controlled within a safe range for critical loads [1]. Additionally, in contrast to the voltage source converter, the modulation index is generally controlled high to reduce the converter loss for the current source converter [11]. In this way, the proposed method is very effective because the voltage difference between rectifier and inverter sides can be minimized.…”

Section: It Can Be Observed That the Best Pulse Pattern Arrange Is mentioning

confidence: 99%

“…Besides, there is a potential risk of overcurrent due to the phase-leg short circuit, which reduces the system reliability. On the other hand, the current source converters have the inherent current limiting capability and thus enhance the reliability [8][9][10][11]. Furthermore, they allow forbidden states in the case of voltage source converters that may cause short-circuit, being in case of current source a desirable possibility to achieve soft-switching operation [12].…”

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confidence: 99%

Space Vector Modulation for DC-Link Current Ripple Reduction in Back-to-Back Current-Source Converters for Microgrid Applications

Guo

Guerrero

et al. 2015

IEEE Trans. Ind. Electron.

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Abstract-Back-to-back converters have been typically used to interconnect the microgrids. For a back-to-back current source converter, the dc-link current ripple is one of the important parameters. A large ripple will cause the electromagnetic interference, undesirable high-frequency losses, and system instability. Conventionally, with a given switching frequency and rated voltage, the current ripple can be reduced by increasing the dc-link inductor, but it leads to bulky size, high cost and slow dynamic response. In order to solve this problem, this paper reveals that the current ripple can be significantly reduced by adjusting the gate patterns of space vector modulation (SVM) between the rectifier and inverter in a back-to-back converter. The experimental results verify the effectiveness of the proposed method.

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“…However, what reference current selection used, as well as the converter specific operation and parameters are not given in the paper. In Li et al (2009) the selection of flux level in a Current Source Inverter (CSI)-drive was studied to optimize the losses due to the dc-link current. In the same way it would be valuable to do a similar study also for a Voltage Source Inverter (VSI)-drive.…”

Section: Introductionmentioning

confidence: 99%

DC-link voltage selection for a multi-MW wind turbine

Roshanfekr

Thiringer

Lundmark

et al. 2014

COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering

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Purpose -The purpose of this paper is to investigate how the dc-link voltage for the converter of a wind generator should be selected, i.e. to determine the losses in the generator and the converter when using various dc-link voltage levels. Design/methodology/approach -To presents the efficiency evaluation of 5 MW wind turbine generating systems, two 5 MW surface mounted permanent magnet synchronous generators (PMSG) with medium and low rated voltage is designed. A two-level transistor converter is considered for ac/dc conversion. Three different dc-link voltage levels are used. By using these voltage levels the PMSG is utilized in slightly different ways. Findings -It is found that the system with the lower voltage machine has slightly higher annual energy efficiency compare to the higher voltage system. Furthermore, it is shown that the best choice for the dc-link voltage level is a voltage between the minimum voltage which gives the desired torque and the voltage which gives Maximum Torque Per Ampere. Originality/value -A procedure as well as investigations with quantified results on how to find the highest complete drive system efficiency for a wind turbine application. Based on two given PMSG, the most energy-efficient dc-link voltage has been established.

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DC link current minimization for high power current source motor drives

Cited by 12 publications

References 28 publications

Common-mode voltage reduction for medium-voltage current source converters by optimizing switching sequences

Common-mode voltage reduction for medium-voltage current source converters by optimizing switching sequences

Space Vector Modulation for DC-Link Current Ripple Reduction in Back-to-Back Current-Source Converters for Microgrid Applications

DC-link voltage selection for a multi-MW wind turbine

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