A Simple Method for Reducing THD and Improving the Efficiency in CSI Topology Based on SiC Power Devices

Silicon carbide (SiC)-based switching devices provide significant performance improvements in many aspects, including lower power dissipation, higher operating temperatures, and faster switching; compared with conventional Si devices, all these features contribute to these devices generating interest in applications for electric traction systems. The topology that is frequently used in these systems is the voltage source inverter (VSI), but the use of SiC devices in the current source inverter topology (CSI), which is considered as an emerging topology, generates interest. This paper presents a method for improving total harmonic distortion (THD) in the currents of output and efficiency in SiC current source inverter for future application in an electric traction system. The method that is proposed consists of improving the coupling of a bidirectional converter topology, voltage current (V-I) and CSI. The V-I converter serves as a current regulator for the CSI, and allows for the recovery of energy. The method involves an effective selection of the switching frequencies and phase angles for the carrier signals that are present in each converter topology. With this method, it is expected to have a reduction of the total harmonic distortion, THD in the output currents. In addition, a comparative analysis between converters with all-SiC technology and converters with hybrid technology is realized, to verify the impact of the SiC devices in the power converters efficiency.

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Utlization Cat Swarm Optimization Algorithm for Selected Harmonic Elemination in Current Source Inverter

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

10.11591/ijpeds.v6.i4.pp888-896 ◽

2015 ◽

Vol 6 (4) ◽

pp. 888 ◽

Cited By ~ 2

Author(s):

Hamed Hosseinnia ◽

Murteza Farsadi

Keyword(s):

Heuristic Algorithm ◽

Optimization Algorithm ◽

Current Source ◽

Harmonic Distortion ◽

Total Harmonic Distortion ◽

Voltage Source ◽

Swarm Optimization ◽

Current Source Inverter ◽

Harmonic Elimination ◽

Selective Harmonic Elimination

The voltage source inverter (VSI) and Current source inverter (CSI) are two types of traditional power inverter topologies.In this paper selective harmonic elimination (SHE) Algorithm was impelemented to CSI and results has been investigated. Cat swarm (CSO) optimization is a new meta-heuristic algorithm which has been used in order to tuning switching parameters in optimized value.Objective fuction is reduction of total harmonic distortion(THD) in inverters output currents.All of simulation has been carried out in Matlab/Software.

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A comparative study of cascade H-bridge multilevel voltage source inverter and parallel inductor multilevel current source inverter

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

10.11591/ijpeds.v10.i3.pp1355-1363 ◽

2019 ◽

Vol 10 (3) ◽

pp. 1355

Author(s):

Nik Fasdi Nik Ismail ◽

Norazlan Hashim ◽

Dalina Johari

Keyword(s):

Output Voltage ◽

Current Source ◽

Harmonic Distortion ◽

Voltage Source ◽

Voltage Source Inverter ◽

Analysis Study ◽

Multilevel Inverters ◽

Advantages And Disadvantages ◽

Current Source Inverter ◽

Current Source Inverters

This paper presents the analysis study between multilevel inverters that are often classified into multilevel voltage source and multilevel current source inverters. For multilevel voltage source inverter (MVSI), the specific topology studied for this work is the Cascaded H-Bridge MVSI. Whereas, the multilevel current source inverter (MCSI) is based on Paralleled Inductor Configuration MCSI. For this study, the analysis between these converters are done with respect to the number of components, the advantages and disadvantages of each converters during performing inverter operation. In term of output voltage and current quality, the percentage of the Total Harmonic Distortion (THD) are measured and compared for both topologies. MATLAB/Simulink software has been used in this research to design and simulate in order to study the performances of both inverters.

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Z–Source Multilevel Inverter Based on Embedded Controller

Indonesian Journal of Electrical Engineering and Computer Science ◽

10.11591/ijeecs.v6.i1.pp1-8 ◽

2017 ◽

Vol 6 (1) ◽

pp. 1

Author(s):

K. Vijayalakshmi ◽

Chinnapettai Ramalingam Balamurugan

Keyword(s):

Current Source ◽

Harmonic Distortion ◽

Multilevel Inverter ◽

Voltage Source ◽

Embedded Control ◽

Current Source Inverter ◽

Ac Power ◽

Embedded Controller ◽

C Value ◽

Dc Component

<p>In this paper Embedded based Z-source multilevel inverter (ZSMLI) is proposed. This work implements a five level cascaded H-bridge Z-source inverter by using embedded control. Switching devices are triggered using embedded controller. In this controller coding is described by using switching table. The presence of Z-source network couples inverter main circuit to the power source that providing special features that can overcome the limitations of VSI (voltage source inverter) and CSI (current source inverter). The Z-source concept can applicable in all dc-ac, dc-dc, ac-dc and ac-ac power conversions. Simulation model of Z-source multilevel inverter based on embedded controller has been built in MATLAB/SIMULINK. The Performance parameters of Z-source MLI such as RMS (root mean square) output voltage, THD (total harmonic distortion) and DC component have been analysed for various inductance (L) and capacitance (C) value.</p>

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Harmonic interaction of a static Var compensator with AC power system containing multiple non-linear loads

Engineering review ◽

10.30765/er.40.3.03 ◽

2020 ◽

Vol 40 (3) ◽

pp. 21-31

Author(s):

Mohamed Nassim Kraimia ◽

Mohamed Boudour

Keyword(s):

Power System ◽

Power Flow ◽

Fourier Transforms ◽

Current Source ◽

Harmonic Distortion ◽

Static Var Compensator ◽

Nonlinear Loads ◽

Compensating Devices ◽

Ac Transmission ◽

The Impact

In this paper a study of the impact of the harmonics generated by a static Var compensator (SVC) is presented. The SVC is modeled, in the harmonic domain, as a coupled current source by using the complex Fourier transforms. Then, this model is converted to polar form to be integrated into the harmonic power flow program. This approach has been carried out on the IEEE 14 bus test power system, in order to show its effectiveness in evaluating the impact of harmonics, injected by the shunt compensating devices, and its interaction with the AC transmission system, in meshed power networks. Since the SVC consists of a thyristorcontrolled reactor (TCR) and a fixed capacitor, the harmonic currents are functions of the TCR thyristors firing angles. The variation of the total voltage harmonic distortion as function of firing angle changes and location of nonlinear loads is clearly presented and discussed.

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A Generalized Three-Phase Multilevel Current-Source Inverter Topology

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.88-89.373 ◽

2011 ◽

Vol 88-89 ◽

pp. 373-378

Author(s):

Jian Yu Bao ◽

Wei Bing Bao ◽

Zhong Chao Zhang

Keyword(s):

Control Strategies ◽

Current Source ◽

Voltage Source ◽

Output Current ◽

Current Source Inverter ◽

Multilevel Structure ◽

Three Phase ◽

Dc Current ◽

And Control ◽

Inverter Topology

A generalized three-phase multilevel current-source inverter (MCSI) topology is proposed by implanting the generalized N-level current cells into a three-phase MCSI topology which is derived from the three-phase multilevel voltage-source inverter (MVSI) topology through dual conversion. In the generalized three-phase MCSI topology, each intermediate dc-link current level can be automatically balanced without adding any external circuits, thus a true multilevel structure is provided. Output current of each phase is independently modulated because of being supplied with two DC current-sources. This allows the wealth of existing knowledge relating to the operations, modulations and control strategies of multilevel VSI to be immediately applied to such multilevel CSI. Simulation results of 5-level and 7-level CSI systems are presented to verify the proposed three-phase MCSI topology.

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