Open-Switch Fault Detection Method of a Back-to-Back Converter Using NPC Topology for Wind Turbine Systems

Lee, June-Seok; Lee, Kyo‐Beum; Blaabjerg, Frede

doi:10.1109/tia.2014.2327151

Cited by 148 publications

(62 citation statements)

References 23 publications

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“…Thus, the reference current vector should be calculated with equation (5) by one more iteration for the next time step. Thus, to compensate the delay for the proposed HMPVC strategy, the prediction model in (4) is modified as (12), which helps reduce the control error by predicting the reference voltage vector at time step k+2.…”

Section: A Verification Of the Compensation Methods Of The Time Delaymentioning

confidence: 99%

“…With three-level NPC converters, the drive systems can easily achieve high performances due to its effective use of four-quadrant operation under an alternative back-to-back configuration [12]. However, due to the voltage ratings of the available high-power switching devices, the three-level NPC is mostly applied in commercial applications with line-to-line output voltages below 6 kV, such as drive systems with 3.3 kV and 4.16 kV output voltages.…”

Section: Introductionmentioning

confidence: 99%

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A Hierarchical Model Predictive Voltage Control for NPC/H-Bridge Converters with a Reduced Computational Burden

Gong

Dai

et al. 2017

Journal of Power Electronics

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In recent years, voltage source multilevel converters are very popular in medium/high-voltage industrial applications, among which the NPC/H-Bridge converter is a popular solution to the medium/high-voltage drive systems. The conventional finite control set model predictive control (FCS-MPC) strategy is not practical for multilevel converters due to their substantial calculation requirements, especially under high number of voltage levels. To solve this problem, a hierarchical model predictive voltage control (HMPVC) strategy with referring to the implementation of g-h coordinate space vector modulation (SVM) is proposed. By the hierarchical structure of different cost functions, load currents can be controlled well and common mode voltage can be maintained at low values. The proposed strategy could be easily expanded to the systems with high number of voltage levels while the amount of required calculation is significantly reduced and the advantages of the conventional FCS-MPC strategy are reserved. In addition, a HMPVC-based field oriented control scheme is applied to a drive system with the NPC/H-Bridge converter. Both steady-state and transient performances are evaluated by simulations and experiments with a down-scaled NPC/H-Bridge converter prototype under various conditions, which validate the proposed HMPVC strategy.

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Section: A Verification Of the Compensation Methods Of The Time Delaymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Hierarchical Model Predictive Voltage Control for NPC/H-Bridge Converters with a Reduced Computational Burden

Gong

Dai

et al. 2017

Journal of Power Electronics

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show abstract

“…In the grid-connected IMC, power generated by the generator of the GS is directly transmitted to the three-phase grid without the energy storage elements. Therefore, under unbalanced grid voltage conditions, the apparent electric power (S) generated by the generator of the GS can be calculated using V p dq , I p dq , V n dq , and I n dq as in Equation (6).…”

Section: Determination Of Reference Currents For Balanced Currents Ofmentioning

confidence: 99%

“…It consists of a rectifier stage, inverter stage, and DC-link stage as energy storage elements. Therefore, a B2B converter is an AC-DC-AC indirect power conversion system; furthermore, it has disadvantages such as a bulky size and short lifetime because of the DC-link capacitors [6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Balanced Current Control Strategy for Current Source Rectifier Stage of Indirect Matrix Converter under Unbalanced Grid Voltage Conditions

Bak

Lee

2016

Energies

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This paper proposes a balanced current control strategy for the current source rectifier (CSR) stage of an indirect matrix converter (IMC) under unbalanced grid voltage conditions. If the three-phase grid connected to the voltage source inverter (VSI) of the IMC has unbalanced voltage conditions, it affects the currents of the CSR stage and VSI stage, and the currents are distorted. Above all, the distorted currents of the CSR stage cause instability in the overall system, which can affect the life span of the system. Therefore, in this paper, a control strategy for balanced currents in the CSR stage is proposed. To achieve balanced currents in the CSR stage, the VSI stage should receive DC power without ripple components from the CSR stage. This is implemented by controlling the currents in the VSI stage. Therefore, the proposed control strategy decouples the positive and negative phase-sequence components existing in the unbalanced voltages and currents of the VSI stage. Using the proposed control strategy under unbalanced grid voltage conditions, the stability and life span of the overall system can be improved. The effectiveness of the proposed control strategy is verified by simulation and experimental results.

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“…Many diagnosis methods have been proposed in the recent literature to identify the open-circuit fault of power transistors and diodes utilized in the three-level NPC converter [5,6,7,8,9,10]. Some of the diagnosis and faulty components identification methods are based on the analysis of the instantaneous pole voltage and its duration [5], as well as the currents in the dc-bus neutral point.…”

Section: Introductionmentioning

confidence: 99%

Real-Time Implementation of an Open-Circuit Dc-Bus Capacitor Fault Diagnosis Method for a Three-Level NPC Rectifier

Lahouar¹,

Hamouda²,

Slama³

2016

ijacsa

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Open-Switch Fault Detection Method of a Back-to-Back Converter Using NPC Topology for Wind Turbine Systems

Cited by 148 publications

References 23 publications

A Hierarchical Model Predictive Voltage Control for NPC/H-Bridge Converters with a Reduced Computational Burden

A Hierarchical Model Predictive Voltage Control for NPC/H-Bridge Converters with a Reduced Computational Burden

Balanced Current Control Strategy for Current Source Rectifier Stage of Indirect Matrix Converter under Unbalanced Grid Voltage Conditions

Real-Time Implementation of an Open-Circuit Dc-Bus Capacitor Fault Diagnosis Method for a Three-Level NPC Rectifier

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