Query: T-type inverter; SPWM

Candidate papers:

abstract: Quasi impedance source (qZ source) network which is coupled between the DC source and converter circuit, can single stage power conversion buck and boost ability of the DC link voltage and upgrade the reliability of the inverter. This paper describes the steady state and total harmonic distortion (THD) values of qZ source and T type inverter. Both types of inverter are simulated by using MATLAB/SIMULINK. The qZ source inverter suffers from relatively large semiconductor conduction losses because the output current always flows through two switching devices. In contrast, to reduce the power losses on semiconductor device and get the improve output voltage quality; the qZ source T type is used. The first method of qZ source is based on the simple boost (SB) sinusoidal pulse width modulation (SPWM) control method and the second method of qZ source T type combines multicarrier phase disposition (PD) and SB SPWM control method. Output voltage quality of qZ source T type inverter is better than qZ source inverter. Average switch voltage stress and output THDv value of the T type inverter is less value than qZ source inverter.
author_names: thinzar thinzar

Tun Linnaing
title: SIMULATION OF QUASI Z SOURCE THREE PHASE VOLTAGE SOURCE INVERTER AND T TYPE INVERTER WITH SB SPWM CONTROL METHOD
year: 2019

abstract: In this letter, a new control method based on the sinusoidal pulsewidth modulation scheme is proposed to control capacitor voltages of a T type four level nested neutral point clamped (NNPC) inverter. The T type four level NNPC inverter has a lower number of switches and components compared with other four level classic and advanced inverters, which make this topology attractive for high power medium voltage applications. This topology has been proposed and studied with the assumption of constant dc sources instead of flying capacitors. In this letter, a simple single phase modulator is developed to balance flying capacitor voltages. The performance and the feasibility of the proposed control technique are evaluated experimentally under a steady state and transient conditions and for different modulation indexes and loads. The experimental results demonstrate the effectiveness of the developed control method to control the capacitors' voltages.
author_names: Ahoora Bahrami

Mehdi Narimani
title: A Sinusoidal Pulsewidth Modulation (SPWM) Technique for Capacitor Voltage Balancing of a Nested T Type Four Level Inverter
venue: IEEE Transactions on Power Electronics
year: 2019

abstract: In this work, a vector controlled induction motor drive (VCIMD) is proposed for the medium and high rating applications. At input end of the proposed drive, a thirty six pulse AC DC converter is used to limit the utility current harmonics to acceptable level as specified in IEEE 519 standard. A 5 level T type multilevel inverter is used at the drive end to improve the steady state, dynamic and power quality performances of VCIMD. To avoid voltage balancing problem at the input of a T type inverter, the isolated DC supplies are used. These isolated supplies are derived from a delta polygon configured phase shifting transformer followed by six pulse diode bridge rectifiers (DBRs) In order to control a T type inverter and an induction motor, the simple phase disposition (PD) sinusoidal pulse width modulation (SPWM) and the indirect vector control are used, respectively. The proposed drive is examined under all possible operations of an induction motor. The proposed thirty six pulse AC DC converter fed 5 level T type inverter based VCIMD is modelled and its performance is simulated in Simulink/MATLAB environment to demonstrate its effectiveness for the medium and high rating applications.
author_names: Piyush Kant

Bhim Singh
title: Thirty six pulse AC DC converter fed T type inverter based vector controlled induction motor drive
venue: 2017 IEEE Transportation Electrification Conference (ITEC India)
year: 2017

abstract: Abstract This paper is a study on the neutral point voltage balancing of the three phase 3 level T type inverter using the predictive control techniques. Recently, multi level inverter has been attracting attention as the advantages such as efficiency improving and harmonic reduction. Especially, the T type inverter topology is advantageous in low DC link voltage. However, in case of the prediction control, it takes a lot of time, because there exist 27 voltage vectors and it has to be calculated according to the respective voltage vectors. Therefore, in this paper, we propose a method to implement predictive control techniques while reducing the operation time. In order to reduce the operation time, the predictive control is implemented by using the minimum voltage vector except for the unnecessary voltage vector. The result of the implemented predictive control is added to the SPWM by using the offset voltage. It was verified through simulation and experimental results.Key Words 3 Level inverter, T type inverter, Voltage balancing, Predictive control+Corresponding Author Dept. of Electrical Electronic Control Engineering, Institute for information technology convergence, Hankyong National University, Korea E mail woocheol@hknu.ac.kr* Dept. of Electrical Electronic Control Engineering, Hankyong National University, Korea Received October 7, 2015; Accepted January 13, 2016
author_names: Tae-hun Kim

Woo-Cheol Lee
title: The DC link Voltage Balancing of the Three Level T type Inverter Using the Predictive Control
year: 2016

abstract: In this paper, a comparative study of a T type Asymmetrical multilevel inverter (ASMLI) with two sources namely a Battery as a low voltage source and solar with boost converter as a higher voltage source is analyzed with respect to a conventional H Bridge Converter. Two switches with an antiparallel diode are used to modulate the low voltage level and a conventional VSI is used to obtain a high voltage level in the power circuit. A state space model is derived and stability analysis is performed. A vertical shifted SPWM control is used for obtaining switching mechanism of the ASMLI circuit. The analytical study ASMLI is interfaced between the low level input voltage sources solar and/or battery with the AC load or AC grid. It is observed that the system is well stable by taking the output voltage and inductor current. A comparison with a conventional H Bridge inverter is brought about through various cases with single source. Total Harmonic Distortion, conduction losses, efficiency, voltage and current stresses are in detail compared and derived that this inverter is capable for applications for power ratings less than 100 KW. Also the stress and rate of change of current on the front end Boost converter is found to be approximately 50% less compared to a conventional based DC AC configuration. The simulation is performed in PSCAD v4.6 and observation is done for 5 kW load with different power factor's and also with different modulation indexes. For medium and low power applications, T type Asymmetrical multilevel inverter (ASMLI) can be preferred.
author_names: Sreedhar Andavarapu

Satish Kumar Gudey
title: A Comparative study of a T type Asymmetrical Multilevel Inverter with Two Different Sources with Conventional H bridge Converter
venue: 2018 8th IEEE India International Conference on Power Electronics (IICPE)
year: 2018

abstract: An efficient multicarrier SPWM for cascaded H Bridge symmetrical multilevel inverter is discussed here. The performance output levels of the CHB MLI is depends on number of DC input voltage sources. If two DC sources are applied then it gives five levels at output and three DC sources gives seven levels of output. In this papermulticarrierSPWM switching is provided to the multilevel inverter switches. In this switching method two signals are used, one is reference and another is carrier signal. For SPWM technique reference signal is sine wave and triangular wave is carrier signal. This type of inverters have thecapability to produce waveforms with better harmonic spectrum and realistic output results. The results of the model shows that the THD is reduced with the modulation of sinusoidal pulse width. The simulation results shows that quality of output voltagewaveform gets improved with less loss as well as lower THD.
author_names: Patil Swapnil Sanjay

Patil Rupali Tanaji

Sunil K Patil
title: Symmetrical Multilevel Cascaded H Bridge Inverter Using Multicarrier SPWM Technique
venue: 2018 3rd International Conference for Convergence in Technology (I2CT)
year: 2018

abstract: Multi Level converter topologies have gained much attention during recent three decades due to their significant benefits in a wide range of applications especially for high power and medium voltage applications. This paper presented a novel Nested T Type (NT Type) four level inverter for high power and medium voltage applications. Main advantages of NT Type four level topology are: operating over a wide range of voltage without the requirement to connect to power devices in series, high quality output voltage, and less proportion of components in comparison with other classical four level topologies. Also, comparison of the conduction losses between the NT Type and Nested Neural Point Clamped (NNPC) inverter is determined. The three type Sinusoidal Pulse Width Modulation (SPWM) schemes, which are the most popular modulation schemes in industry applications, are utilized in this study for NT Type and NNPC topologies. The performance of the NT Type inverter is verified by MATLAB/Simulink.
author_names: Ch Sreenu

Ch Chandana
title: A Novel Nested T Type Four Level Inverter for Medium Voltage Applications
year: 2016

abstract: Multi Level converter topologies have gained much attention during recent three decades due to their significant benefits in a wide range of applications especially for high power and medium voltage applications. This paper presented a novel Nested T Type (NT Type) four level inverter for high power and medium voltage applications. Main advantages of NT Type four level topology are: operating over a wide range of voltage without the requirement to connect to power devices in series, high quality output voltage, and less proportion of components in comparison with other classical four level topologies. Also, comparison of the conduction losses between the NT Type and Nested Neural Point Clamped (NNPC) inverter is determined. The three type Sinusoidal Pulse Width Modulation (SPWM) schemes, which are the most popular modulation schemes in industry applications, are utilized in this study for NT Type and NNPC topologies. The performance of the NT Type inverter is verified by MATLAB/Simulink. Keywords Nested T Type four level inverter; medium voltage applications.
author_names: Aliasghar Hajirayat

Faramarz Faraji

A Birjandi
title: A Novel Nested T Type Four Level Inverter for Medium Voltage Applications
year: 2016

abstract: With the rapid development of photovoltaic (PV) power generation, technology of the grid connected photovoltaic system becomes an important part of the photovoltaic power generation. Based on this background, grid connection techniques of T Type three level grid connected inverter with an LCL filter is studied in this paper. The subject combines SPWM modulation strategy and dual current loop control strategy. Due to the coupling relationship among LCL filter parameters, it is complicated to design the L and C parameters in the LCL filter. This paper analyzes the selection of LCL filter parameters. The control strategies of this paper are carried out under the MATLAB/Simulink simulation environment. Correctness and feasibility of control strategies are verified through the simulation results.
author_names: Mengyan Wang

Quan Chen

Guoli Li

Cungang Hu

Long Cheng

Rui Zhou
title: LCL filter design in T type three level grid connected inverter
venue: 2016 IEEE 11th Conference on Industrial Electronics and Applications (ICIEA)
year: 2016

abstract: This paper presents the comparison power quality of the voltage source inverter type a space vector pulse width modulation (SVPWM) and sinusoidal pulse width modulation (SPWM) technique for adjust speed of the induction motor. All the drives are implemented on real time Simulink model of three phase variable magnitude of voltage and variable frequency type are used the drive voltage source inverter system. This scheme leads to be able to adjust the speed of the motor by control the frequency and amplitude of the model. The ratio of input stator voltage to frequency should be kept constant. The overall control system is implemented on dSPACE DSP DS1104 controller board. The power quality of voltage source inverter are measured and compared to supply the 120 watt induction motor full load condition.
author_names: Satean Tunyasrirut

S Srilad

Tianchai Suksri
title: Comparison power quality of the voltage source inverter type SVPWM and SPWM technique for induction motor drive
venue: 2008 SICE Annual Conference
year: 2008