Neutral Point Potential Balancing Algorithm at Low Modulation Index for Three-Level Inverter Medium-Voltage Drives

Holtz, J.; Οικονόμου, Νικόλαος

doi:10.1109/tia.2007.895767

Cited by 108 publications

(42 citation statements)

References 11 publications

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“…However, they are not cost-effective because they require additional hardware. Other approaches were proposed in [15]- [17]. However, their use is limited.…”

Section: Introductionmentioning

confidence: 99%

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Neutral-Point Voltage Balancing Method for Three-Level Inverter Systems with a Time-Offset Estimation Scheme

Choi¹,

Lee²

2013

Journal of Power Electronics

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This paper presents a neutral-point voltage balancing method for three-level inverter systems using a time-offset estimation scheme. The neutral-point voltage is balanced by adding a time-offset to the turn-on time of the switches. If an inaccurate time-offset is added, the neutral-point deviation still remains. An accurate time-offset is obtained through the proposed time-offset estimation scheme. This method is implemented without additional hardware, complex calculations, or analysis. The effectiveness of the proposed method is verified by experiments.

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“…However, they are not cost-effective because they require additional hardware. Other approaches were proposed in [15]- [17]. However, their use is limited.…”

Section: Introductionmentioning

confidence: 99%

“…However, their use is limited. Some of the methods can only be used in low modulation index [15], [16]. The method proposed in [17] can be applied when SHE-PWM is used.…”

Section: Introductionmentioning

confidence: 99%

Neutral-Point Voltage Balancing Method for Three-Level Inverter Systems with a Time-Offset Estimation Scheme

Choi¹,

Lee²

2013

Journal of Power Electronics

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“…In order to maintain the equal voltage division, it is critical to control the Neutral Point Potential (NPP). A large amount of research has looked at solving of this problem [3], [4], [5].…”

Section: Introductionmentioning

confidence: 99%

Sensorless DTC of induction motor using improved neural network switching state selector controller

Messaïf¹,

Berkouk²,

Saadia³

2010

Archives of Control Sciences

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The paper deals with development of sensorless Direct Torque Control (DTC) system based on neural network. This network is built to solve the task of proper switching states selection based on information about electromagnetic torque and stator flux (position and magnitude) of induction motor. In fact, this technique which uses conventional switching table is not convenient for one-line and real time control for its high computation time. In order to avoid this problem a solution based on neural network is proposed. Well trained Artificial Neural Network structure can replace successfully the switching table. However, in the Neutral-Point-Clamped topology, it has an inherent problem of Neutral Point Potential (NPP) variation. In this way, a Neural Network-Direct Torque Control technique has been applied and the estimated value of the Neutral Point Potential is used, which is calculated by motor currents. This control strategy offers the possibility of selecting appropriate switching state to achieve the control of Neutral Point Potential. Simulation results verify the validity of the proposed method.

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“…In order to maintain the equal voltage division, it is critical to control Neutral Point Potential (NPP). A large amount of research has looked at solving this problem [2,4,5]. Meanwhile, the NPP has closed relations with the vectors that can be implemented by different switch combinations.…”

Section: Introductionmentioning

confidence: 99%

A Study of DTC-Power Electronic Cascade Fed by Photovoltaic Cell-Three-Level NPC Inverter

Messaïf¹,

Berkouk²,

Saadia³

2010

SGRE

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Neutral Point Potential Balancing Algorithm at Low Modulation Index for Three-Level Inverter Medium-Voltage Drives

Cited by 108 publications

References 11 publications

Neutral-Point Voltage Balancing Method for Three-Level Inverter Systems with a Time-Offset Estimation Scheme

Neutral-Point Voltage Balancing Method for Three-Level Inverter Systems with a Time-Offset Estimation Scheme

Sensorless DTC of induction motor using improved neural network switching state selector controller

A Study of DTC-Power Electronic Cascade Fed by Photovoltaic Cell-Three-Level NPC Inverter

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