Proceedings ArticleDOI
Five-level GTO inverters for large induction motor drives
R.W. Menzies,P. Steimer,J.K. Steinke +2 more
- Vol. 30, Iss: 4, pp 938-944
TLDR
It is shown that a combination of several PWM techniques offers the best solution for the drives application and that large induction motors with ratings up to 22 MVA, 7.46 kV may be supplied by the five-level inverter using presently available 4.5 kV, 3.0 kA GTO thyristors.Abstract:
The development of large induction motor drives with low torque ripple and fast dynamic response for new or retrofit applications has been limited by the device ratings and problems of series connections. This paper investigates the use of a five-level GTO voltage-sourced inverter for large induction motor drives. The advantages of such a drive are that single GTO thyristors may be used at each level, thereby avoiding the need for series connection of the thyristors. The thyristors are well protected from overvoltages by the clamping action of the DC supply capacitors. The disadvantages are that each DC level requires a separate supply, four in the case of the five-level inverter, and that the devices are not equally loaded. This paper reviews the basic operation of the five-level inverter and possible PWM voltage/frequency control techniques for the specific application of induction motor drives. The simulation results clearly show the unequal loading of the devices and the need for independent voltage supplies for the five levels. It is shown that a combination of several PWM techniques offers the best solution for the drives application. The conclusions indicate that large induction motors with ratings up to 22 MVA, 7.46 kV may be supplied by the five-level inverter using available 4.5 kV, 3.0 kA GTO thyristors. The recommended supply for such an inverter with full regenerative operation over the complete speed range is four, four-quadrant converters in a quasi-24-pulse configuration. >read more
Citations
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Design and Analyses of a PWM based Seven Level CascadeCombination Inverter
Mortaza Sefidi,Mehdi Jarahi +1 more
TL;DR: In this article, all equations dominating the circuit have been investigated and main and effective parameters have been identified in suggested Invertors and this method has been extended for use in n-level Inverters.
Journal Article
The Selective Harmonic Elimination Technique for Harmonic Reduction of Multilevel Inverter Using PSO Algorithm
Maruthupandiyan. R,Brindha. R +1 more
TL;DR: In multilevel inverters, the Selective Harmonic Elimination (SHE) technique is the most important one and it is found that, PSO based switching angles greatly reduces the THD when compared with the normal switching.
Journal Article
Control of Active and Reactive Power Through Multi-Level Inverter Based UPFC System
TL;DR: The main scope of this paper is to involve the improvement of transient stability by using the pulse width modulation based multi level inverter system on MATLAB and simulation software.
Book ChapterDOI
Comparative Analysis of Multi-level Inverters with Various PWM Techniques
TL;DR: In this article , a comparative analysis of 17-level voltage source inverter with PWM techniques to the conventional topologies of cascaded H Bridge MLI is presented. And the proposed 17 level MLI was verified by required simulations in PWM and cascaded h bridge model on MATLAB and the corresponding sim-results are presented.
References
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Journal ArticleDOI
A new multilevel PWM method: a theoretical analysis
TL;DR: In this article, a generalization of the Pulse Width Modulation (PWM) subharmonic method for controlling single-phase or three-phase multilevel voltage source inverters (VSIs) is considered.
Journal ArticleDOI
Generalized Structure of a Multilevel PWM Inverter
TL;DR: In this article, a generalized structure of a multilevel voltage source thyristor inverter is proposed to decrease the harmonic distortion in the output waveform without decreasing the inverter power output.
Proceedings Article
Switching frequency optimal PWM control of a three-level inverter
TL;DR: In this article, a pulsewidth modulation (PWM) method for the control of a three-level inverter is described, which works with a constant carrier frequency not synchronized with fundamental stator frequency.
Journal ArticleDOI
Switching frequency optimal PWM control of a three-level inverter
TL;DR: In this article, a switching frequency optimal PWM method (SFO-PWM) was proposed for the control of a three-level inverter with a DC-link neutral point not stabilized from the power input converter.
Proceedings ArticleDOI
Control strategy for a three phase AC traction drive with three-level GTO PWM inverter
TL;DR: A control strategy developed for two-level inverters is applied to the three-level gate-turn-off PWM inverter, resulting in results from computer simulation for a traction motor with 1400 kW nominal power.