Highly Reliable Back-to-Back Power Converter Without Redundant Bridge Arm for Doubly Fed Induction Generator-Based Wind Turbine

Ni, Kai; Hu, Yihua; Lagos, Dimitris T.; Chen, Guipeng; Wang, Zheng; Li, Xinhua

doi:10.1109/tia.2019.2892925

Cited by 27 publications

(11 citation statements)

References 41 publications

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“…When the DQ transformation is performed on nonlinear signals, the harmonic profile is mapped as an AC signal and added to the DC signals (d and q components) as shown in Figure 3 [37]. From Equation (6), it has to be considered that (8) to guarantee the power balance. Hence, through the control of the dq current components, it is possible to control the active and reactive power.…”

Section: Modeling Of the Btb-vsc Convertermentioning

confidence: 99%

“…The properties of this combination are well-known: the BTB-VSC is used to supply an unitary power factor at each AC side; the DC bus voltage is generally higher than the peak AC source voltage standard [28]. In fact, this type of configuration is the most used for WECS and MAECS [6,12,[18][19][20][21][22]. To achieve the objectives described above, control of the BTB-VSC is developed considering synchronous coordinates such as the rotating (dq0) [6,7,12,14,15,18,22,25,27,31] and stationary (αβ0) [17,23,29,31], as well as the time-domain or conventional (abc) [9,26,30], reference frame.…”

Section: Introductionmentioning

confidence: 99%

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The Performance of the BTB-VSC for Active Power Balancing, Reactive Power Compensation and Current Harmonic Filtering in the Interconnected Systems

et al. 2020

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Nowadays, the use of power converters to control active and reactive power in AC–AC grid-connected systems has increased. With respect to indirect AC–AC converters, the tendency is to enable the back-to-back (BTB) voltage source converter (VSC) as an active power filter (APF) to compensate current harmonics. Most of the reported works use the BTB-VSC as an auxiliary topology that, combined with other topologies, is capable of active power regulation, reactive power compensation and current harmonic filtering. With the analysis presented in this work, the framework of the dynamics associated with the control loops is established and it is demonstrated that BTB-VSC can perform the three tasks for which, in the reviewed literature, at least two different topologies are reported. The proposed analysis works to support the performance criteria of the BTB-VSC when it executes the three control actions simultaneously and the total current harmonic distortion is reduced from 27.21% to 6.16% with the selected control strategy.

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Section: Modeling Of the Btb-vsc Convertermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Performance of the BTB-VSC for Active Power Balancing, Reactive Power Compensation and Current Harmonic Filtering in the Interconnected Systems

et al. 2020

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“…This solution requires only one additional bidirectional switch per phase, making it a very cost-effective solution. This solution has been widely used in both 2-level [37,38,[40][41][42][43][44][45][46][63][64][65][66] and NPC [29][30][31][47][48][49][50][51][52][53][54][55] converters. A similar approach has been proposed for 2-level converters in [61,62], connecting the faulty phase to an auxiliary capacitor instead of the DC bus midpoint.…”

Section: Introductionmentioning

confidence: 99%

“…With these approaches, the controller can only operate normally with modulation indexes below 0.5, which implies a derating of the system. Even though a derating may be acceptable in some applications [30], such as motor drives [37,40,51,54,67] or generation [38,46,47,53,63,64], it is not viable in UPS applications since the system cannot compromise or restrict the operation of the protected critical load.…”

Section: Introductionmentioning

confidence: 99%

Fault Analysis and Non-Redundant Fault Tolerance in 3-Level Double Conversion UPS Systems Using Finite-Control-Set Model Predictive Control

Caseiro

Mendes

2021

Energies

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Fault-tolerance is critical in power electronics, especially in Uninterruptible Power Supplies, given their role in protecting critical loads. Hence, it is crucial to develop fault-tolerant techniques to improve the resilience of these systems. This paper proposes a non-redundant fault-tolerant double conversion uninterruptible power supply based on 3-level converters. The proposed solution can correct open-circuit faults in all semiconductors (IGBTs and diodes) of all converters of the system (including the DC-DC converter), ensuring full-rated post-fault operation. This technique leverages the versatility of Finite-Control-Set Model Predictive Control to implement highly specific fault correction. This type of control enables a conditional exclusion of the switching states affected by each fault, allowing the converter to avoid these states when the fault compromises their output but still use them in all other conditions. Three main types of corrective actions are used: predictive controller adaptations, hardware reconfiguration, and DC bus voltage adjustment. However, highly differentiated corrective actions are taken depending on the fault type and location, maximizing post-fault performance in each case. Faults can be corrected simultaneously in all converters, as well as some combinations of multiple faults in the same converter. Experimental results are presented demonstrating the performance of the proposed solution.

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“…Modulation is another key aspect of open switch fault‐tolerant systems since the number of available vectors to carry out the modulation after the fault is only four. For example, in [11], the duty cycles of the vectors are calculated by means of simple equations, which, although gives rise to a simple modulation, make it unnecessary to find the sector where the voltage reference is located. The modulation proposed in [12] is simple to implement and uses the smallest vectors to generate the zero vector, which improves the performance.…”

Section: Introductionmentioning

confidence: 99%

Robust control of a floating OWC WEC under open‐switch fault condition in one or in both VSCs

Ramirez

Blanco

Zarei

et al. 2020

IET Renewable Power Generation

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The operation and maintenance activity of offshore wind turbines (WTs) increases the cost of the generated energy. Although significant efforts have been made to improve the reliability of the mechanical subassemblies, electrical and electronic subassemblies fail more frequently, causing undesirable downtimes and loss of revenues. Since offshore WTs and wave energy converters (WECs) share the electrical and electronic subassemblies, the reliability of WECs is expected to be affected by the same causes. This study presents a robust model predictive control for a WEC consisting of an oscillating water column (OWC) installed in a point absorber. The control system is capable of dealing with open switch faults in one or two insulatedgate bipolar transistors of the same arm in any of the voltage source converters (VSCs), or even in both VSCs at the same time. The system allows the OWC WEC to generate energy, although under certain restrictions, thereby reducing the urgency of repair and loss of revenues. The performance of the proposed approach is tested for several cases of open switch faults, experimentally in the laboratory using an OWC WEC emulator.

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Highly Reliable Back-to-Back Power Converter Without Redundant Bridge Arm for Doubly Fed Induction Generator-Based Wind Turbine

Cited by 27 publications

References 41 publications

The Performance of the BTB-VSC for Active Power Balancing, Reactive Power Compensation and Current Harmonic Filtering in the Interconnected Systems

The Performance of the BTB-VSC for Active Power Balancing, Reactive Power Compensation and Current Harmonic Filtering in the Interconnected Systems

Fault Analysis and Non-Redundant Fault Tolerance in 3-Level Double Conversion UPS Systems Using Finite-Control-Set Model Predictive Control

Robust control of a floating OWC WEC under open‐switch fault condition in one or in both VSCs

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