Five level neutral-point clamped inverter for a dynamic voltage restorer

Meyer, C.; Romaus, Christoph; DeDoncker, Rik W.

doi:10.1109/epe.2005.219597

Cited by 16 publications

(8 citation statements)

References 8 publications

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“…In the NPC MLI topology, as the number of voltage level increases more than three, the balancing of capacitors' voltage is far from easy, which is why the three-level NPC MLI is typically used [63][64][65][66]. In the FC MLI topology, not only is the selection of switches more flexible but also the voltage balance of capacitors is more controllable.…”

Section: Dvr: Power Converter Topologiesmentioning

confidence: 99%

Dynamic Voltage Restorer (DVR): A Comprehensive Review of Topologies, Power Converters, Control Methods, and Modified Configurations

Moghassemi

Padmanaban

2020

Energies

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Power quality is a pressing concern and of the utmost importance for advanced and high-tech equipment in particular, whose performance relies heavily on the supply’s quality. Power quality issues like voltage sags/swells, harmonics, interruptions, etc. are defined as any deviations in current, voltage, or frequency that result in end-use equipment damage or failure. Sensitive loads like medical equipment in hospitals and health clinics, schools, prisons, etc. malfunction for the outages and interruptions, thereby causing substantial economic losses. For enhancing power quality, custom power devices (CPDs) are recommended, among which the Dynamic Voltage Restorer (DVR) is considered as the best and cost-effective solution. DVR is a power electronic-based solution to mitigate and compensate voltage sags. This paper provides a thorough discussion and comprehensive review of DVR topologies based on operations, power converters, control methods, and applications. The review compares the state-of-the-art in works of literature, and comparative study on power quality issues, the DVR principle along with its operation modes, the DVR components, the DVR topologies based on energy storage, the DVR topologies based on single-/three-phase power converters, and the DVR topologies based on control units that have different control processing stages. Furthermore, modified and improved configurations of the DVR, as well as its integration with distributed generations, are described. This work serves as a comprehensive and useful reference for those who have an interest in researching DVRs.

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Section: Dvr: Power Converter Topologiesmentioning

confidence: 99%

Dynamic Voltage Restorer (DVR): A Comprehensive Review of Topologies, Power Converters, Control Methods, and Modified Configurations

Moghassemi

Padmanaban

2020

Energies

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“…However, in MV applications, the are some restrictions for the power converter employed in a DVR system [21]. Since the level of the injected voltages represents a real problem for the converter itself, it is necessary to employ a configuration with capability to support such high voltage levels, as in [22].…”

Section: Pcc (Mv)mentioning

confidence: 99%

Dynamic Voltage Restorer Based on Three-Phase Inverters Cascaded Through an Open-End Winding Transformer

Carlos

Santos

Jacobina

et al. 2016

IEEE Trans. Power Electron.

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This paper investigates a dynamic voltage restorer (DVR) composed of two conventional three-phase inverters series cascaded through an open-end winding (OEW) transformer, denominated here DVR-OEW. The DVR-OEW operating with either equal or different dc-link voltages are examined. The proposed topology aims to regulate the voltage at the load side in the case of voltage sags/swells, distortion, or unbalance at the grid voltage. A suitable control strategy is developed, including space-vector analysis, level-shifted PWM (LSPWM) and its equivalent optimized single-carrier PWM (SCPWM), as well as the operating principles and characteristics of the DVR. Comparisons among the DVR-OEW and conventional configurations, including a neutral-point clamped (NPC) converter based DVR, are furnished. The main advantages of the DVR-OEW compared to the conventional topologies lie on: i) reduced harmonic distortion, ii) reduced converter losses, and iii) reduced voltage rating of the power switches. Simulated and experimental results are presented to validate the theoretical studies.

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“…This figure can be used to determine nj in a way that up to a specific value of voltage sag can be compensated. The peak voltage on the switches in their off state can be written as follows: (11) where, V s7:�iff . P II and V/:;: P II are the maximum per-unit voltage on the switches and the maximum voltage of PCC, respectively.…”

Section: Ac/ Ac Converter Based Dvrmentioning

confidence: 99%

“…P II and V/:;: P II are the maximum per-unit voltage on the switches and the maximum voltage of PCC, respectively. As (11) indicates, the voltage on the switches depends on the transformer turns ratio and the maximum voltage of Pce. It is clear that Vp :;: P II is obtained in the case of the maximum voltage swell that the system experiences.…”

Section: Ac/ Ac Converter Based Dvrmentioning

confidence: 99%

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Determination of the transformer turns ratio in a DVR to reduce the switches voltage rating

Farhadi‐Kangarlu

Babaei

2012

2012 3rd Power Electronics and Drive Systems Technology (PEDSTC)

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Dynamic voltage restorer (DVR) as one of the most effective custom power devices for voltage sag and swell compensation attracted growing attention in recent years. Various topologies have been presented for DVRs. The topologies are based on both dc/ac inverters and ac/ac direct converters. The ac/ac converter based DVRs address some problems arise in the conventional dc/ac inverter based DVRs. These problems include compensation time limit due to the limited capacity of the energy storage used in the conventional DVR topologies and costly and bulky dc link capacitors. Therefore, in the ac/ac converter based DVRs the installation area and cost can be reduced and compensation time limitation is eliminated. In this paper, a new algorithm to determination of the transformer turns ratio is given so that the voltage rating of the switches is reduced. On the other hand, as the switches operate with lower voltage, the switching losses and also stress on the switches is mitigated.Moreover, the reduction in the voltage rating as well as required copper for transformer winding leads to reduction in the overall cost of the system. The operation validity of the system is verified through simulation with the PSCAD/EMTDC software.

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Five level neutral-point clamped inverter for a dynamic voltage restorer

Cited by 16 publications

References 8 publications

Dynamic Voltage Restorer (DVR): A Comprehensive Review of Topologies, Power Converters, Control Methods, and Modified Configurations

Dynamic Voltage Restorer (DVR): A Comprehensive Review of Topologies, Power Converters, Control Methods, and Modified Configurations

Dynamic Voltage Restorer Based on Three-Phase Inverters Cascaded Through an Open-End Winding Transformer

Determination of the transformer turns ratio in a DVR to reduce the switches voltage rating

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