New basic unit and cascaded multilevel inverters with reduced power electronic devices

In this paper, a new basic 15-level inverter is proposed. By developing the proposed basic unit, a 71-level inverter and generally an [Formula: see text]-level inverter are proposed. Then, the proposed multilevel inverter is compared with several conventional multilevel inverters in design of minimum 15 levels and 71 levels at the output. By comparing these inverters, it is obtained that the proposed inverter is able to generate higher number of output levels by using lower number of DC voltage sources and power electronic devices that lead to decreased complexity, installation space and total cost of the inverter. Finally, the correct performance of the proposed inverter is reconfirmed through the simulation and experimental results of a 15-level inverter.

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A high-performance multilevel inverter with reduced power electronic devices

International Journal of Power Electronics and Drive Systems (IJPEDS) ◽

10.11591/ijpeds.v11.i4.pp1883-1889 ◽

2020 ◽

Vol 11 (4) ◽

pp. 1883

Author(s):

Amer Chlaihawi ◽

Adnan Sabbar ◽

Hur Jedi

Keyword(s):

Output Voltage ◽

High Performance ◽

Electronic Devices ◽

Design Procedure ◽

Multilevel Inverter ◽

Power Electronic ◽

Analysis And Design ◽

Multilevel Inverters ◽

Design Flexibility ◽

Simulation Results

This paper introduces a new topology of multilevel inverter, which is able to operate at high performance. This proposed circuit achieves requirements of reduced number of switches, gate-drive circuits, and high design flexibility. In most cases fifteen-level inverters need at least twelve switches. The proposed topology has only ten switches. The inverter has a quasi-sine output voltage, which is formed by level generator and polarity changer to produce the desired voltage and current waveforms. The detailed operation of the proposed inverter is explained. The theoretical analysis and design procedure are given. Simulation results are presented to confirm the analytical approach of the proposed circuit. A 15-level and 31-level multilevel inverters were designed and tested at 50 Hz.

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Modern Power Electronic Devices: Physics, applications, and reliability

10.1049/pbpo152e ◽

2020 ◽

Keyword(s):

Electronic Devices ◽

Power Electronic

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Research on Small Square PCB Rogowski Coil Measuring Transient Current in the Power Electronics Devices

Sensors ◽

10.3390/s19194176 ◽

2019 ◽

Vol 19 (19) ◽

pp. 4176 ◽

Cited By ~ 1

Author(s):

Chaoqun Jiao ◽

Juan Zhang ◽

Zhibin Zhao ◽

Zuoming Zhang ◽

Yuanliang Fan

Keyword(s):

Power Electronics ◽

Printed Circuit Board ◽

Electronic Devices ◽

Rogowski Coil ◽

Bipolar Transistors ◽

Circuit Board ◽

Power Electronic ◽

Insulated Gate Bipolar Transistors ◽

Printed Circuit ◽

Internal Structures

With the development of China’s electric power, power electronics devices such as insulated-gate bipolar transistors (IGBTs) have been widely used in the field of high voltages and large currents. However, the currents in these power electronic devices are transient. For example, the uneven currents and internal chip currents overshoot, which may occur when turning on and off, and could have a great impact on the device. In order to study the reliability of these power electronics devices, this paper proposes a miniature printed circuit board (PCB) Rogowski coil that measures the current of these power electronics devices without changing their internal structures, which provides a reference for the subsequent reliability of their designs.

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New Sensor for Medium- and High-Voltage Measurement

Energies ◽

10.3390/en14154654 ◽

2021 ◽

Vol 14 (15) ◽

pp. 4654

Author(s):

Andrzej Wetula ◽

Andrzej Bień ◽

Mrunal Parekh

Keyword(s):

Finite Element Method ◽

Electronic Devices ◽

Finite Element Method Simulation ◽

Laboratory Model ◽

Power Electronic ◽

Proof Of Concept ◽

Voltage Measurement ◽

Medium Voltage ◽

Narrow Frequency Band ◽

Further Development

Measurements of medium and high voltages in a power grid are normally performed with large and bulky voltage transformers or capacitive dividers. Besides installation problems, these devices operate in a relatively narrow frequency band, which limits their usability in modern systems that are saturated with power electronic devices. A sensor that can be installed directly on a wire and can operate without a galvanic connection to the ground may be used as an alternative voltage measurement device. This type of voltage sensor can complement current sensors installed on a wire, forming a complete power acquisition system. This paper presents such a sensor. Our sensor is built using two dielectric elements with different permeability coefficients. A finite element method simulation is used to estimate the parameters of a constructed sensor. Besides simulations, a laboratory model of a sensor was built and tested in a medium-voltage substation. Our results provide a proof of concept for the presented sensor. Some errors in voltage reconstruction have been traced to an oversimplified data acquisition and transmission system, which has to be improved during the further development of the sensor.

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Series Compensation of Transmission Systems: A Literature Survey

Energies ◽

10.3390/en14061717 ◽

2021 ◽

Vol 14 (6) ◽

pp. 1717

Author(s):

Camilo Andrés Ordóñez ◽

Antonio Gómez-Expósito ◽

José María Maza-Ortega

Keyword(s):

Steady State ◽

Power Systems ◽

Power System ◽

Case Studies ◽

Electronic Devices ◽

Literature Survey ◽

Power Electronic ◽

Transmission Systems ◽

Series Compensation ◽

Near Future

This paper reviews the basics of series compensation in transmission systems through a literature survey. The benefits that this technology brings to enhance the steady state and dynamic operation of power systems are analyzed. The review outlines the evolution of the series compensation technologies, from mechanically operated switches to line- and self-commutated power electronic devices, covering control issues, different applications, practical realizations, and case studies. Finally, the paper closes with the major challenges that this technology will face in the near future to achieve a fully decarbonized power system.

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