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vector-based reference location estimating for space vector modulation technique

ELECTRIC POWER SYSTEMS RESEARCH 2012年 86卷 51-60页

作者： Saribulut, Lutfu Teke, Ahmet Tumay, Mehmet Cukurova Univ Dept Elect & Elect Engn Adana Turkey

space vector modulation (SVM) has become a popular pulse width modulation technique (PWM) for multilevel inverters. In SVM technique, the determination of the angular position of the reference voltage vector is very important to generate the required output voltage by the inverter. The switching time and switching sequence of SVM are calculated by vector location. The calculation of vector location and switching time become difficult and more complex when the numbers of output voltage levels increase for a given number of inverter levels. In this paper, a new SVM method is developed to determine the actual vector location. The proposed method can increase RMS value of the inverter output voltage;can reduce the algorithm complexity and computation time when compared to conventional SVM methods. In addition, the calculation of switching times for two-level inverter is generalized for N-level inverters. PSCADJEMTDC simulation program is used to create the test system and to perform the case studies. Extensive simulation results are given to validate the performance of the proposed algorithm. (C) 2011 Elsevier B.V. All rights reserved.

关键词： space vector modulation technique Reference location estimating Multilevel inverter Generalized SVM algorithm

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Design and implementation of Dynamic Voltage Restorer using space vector modulation technique for Improving Power Quality 5

Design and implementation of Dynamic Voltage Restorer using ...

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5th IEEE International Conference on Computation of Power, Energy, Information and Communication (ICCPEIC)

作者： Surendar, S. Madhusudanan, G. Valliammai Engn Coll Dept Elect & Elect Engn Power Syst Engn Kattankulathur India Valliammai Engn Coll Dept Elect & Elect Engn Kattankulathur India

ISBN: (纸本)9781509009008

This manuscript investigate the performance of Dynamic Voltage Restorer for compensate different voltage sag levels with different faults and to decrease the Total Harmonic Distortion during the alleviation process. The DVR is implemented with three phase voltage source inverter and is tied at the point of common coupling in order to normalize the load side voltage. The compensation is based on PI with space vector Pulse Width modulation technique. Extensive simulation analysis under diverse magnitude of sag for faults on load side for balanced and unbalanced conditions is conduct using fault generator. Simulation result examination reveals that DVR performs perfectly with PI based space vector Pulse Width modulation technique. In addition, potential and performance of DVR for various energy storage capacities and insertion transformer evaluation be also analyzed. The performance of these controllers is validated with simulation result using PSCAD/EMTDC.

关键词： Dynamic Voltage Restorer space vector modulation technique voltage sag voltage sag

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Harmonic elimination technique for a single-phase multilevel converter with unequal DC link voltage levels

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IET POWER ELECTRONICS 2012年第8期5卷 1418-1429页

作者： Ghasemi, N. Zare, F. Boora, A. A. Ghosh, A. Langton, C. Blaabjerg, F. Queensland Univ Technol Fac Built Environm & Engn Brisbane Qld 4001 Australia Queensland Univ Technol Fac Sci & Technol Brisbane Qld 4001 Australia Aalborg Univ Dept Energy DK-9220 Aalborg Denmark

Multilevel converters, because of the benefits they attract in generating high quality output voltage, are used in several applications. Various modulation and control techniques are introduced by several researchers to control the output voltage of the multilevel converters like space vector modulation and harmonic elimination (HE) methods. Multilevel converters may have a DC link with equal or unequal DC voltages. In this study a new HE technique based on the HE method is proposed for multilevel converters with unequal DC link voltage. The DC link voltage levels are considered as additional variables for the HE method and the voltage levels are defined based on the HE results. Increasing the number of voltage levels can reduce lower order harmonic content because of the fact that more variables are created. In comparison to previous methods, this new technique has a positive effect on the output voltage quality by reducing its total harmonic distortion, which must take into consideration for some applications such as uninterruptable power supply, motor drive systems and piezoelectric transducer excitation. In order to verify the proposed modulation technique, MATLAB simulations and experimental tests are carried out for a single-phase four-level diode-clamped converter.

关键词： harmonics suppression single-phase four-level diode-clamped converter Matlab simulations Power supply quality and harmonics motor drive systems output voltage control voltage quality piezoelectric transducer excitation harmonic distortion HE methods uninterruptable power supply power convertors single-phase multilevel converter Power convertors and power supplies to apparatus harmonic elimination technique space vector modulation technique DC link voltage level power supply quality lower order harmonic content reduction total harmonic distortion

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Hybrid four-level FC inverter using an internal supercapacitor storage system for a microgrid connected application

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IET POWER ELECTRONICS 2020年第17期13卷 4043-4050页

作者： Mansouri, Sabri Tnani, Slim Bachelier, Olivier Univ Poitiers Lab Informat & Automat Syst ENSIP Batiment B25-2Rue Pierre Brousse TSA 41105 F-86073 Poitiers 9 France

In this study, a new topology of grid-connected four-level inverter is introduced. The proposed structure, based on intermediate supercapacitors energy storage, is introduced to ensure two operation modes: to provide power to a microgrid from renewable energy sources and to regulate its voltage during short-term power disturbances. The main idea is to replace ordinary capacitors of a four-level flying capacitor (FC) inverter by supercapacitors and operate them under variable voltage conditions. The control strategy applies linear matrix inequalities approach as well as space vector modulation technique to generate the appropriate switching states. The latter part of this study is dedicated to the redundant state selection method for supercapacitors voltages balancing. Through experimental implementation, presented results highlight the efficiency of the proposed hybrid inverter in ensuring microgrid stability.

关键词： control system synthesis invertors power generation control power capacitors switching convertors capacitors distributed power generation PWM invertors renewable energy sources power grids linear matrix inequalities supercapacitors supercapacitors voltages redundant state selection method appropriate switching states space vector modulation technique matrix inequalities approach control strategy variable voltage conditions four-level flying capacitor inverter ordinary capacitors short-term power disturbances renewable energy sources operation modes intermediate supercapacitors energy storage grid-connected four-level inverter microgrid connected application internal supercapacitor storage system hybrid four-level microgrid stability hybrid inverter

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Performance of Three-Phase Asymmetric Cascaded Bridge (16:4:1) Multilevel Inverter

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IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS 2015年第10期62卷 5983-5992页

作者： Chattopadhyay, Sumit K. Chakraborty, Chandan Indian Inst Technol Dept Elect Engn Kharagpur 721302 W Bengal India

Availability of more number of levels for the same number of switching devices has made asymmetrical topologies superior over symmetrical structures. While the 16 : 4 : 1 configuration is reported as an optimal asymmetry, a detailed performance is not available in literature. This paper presents the performance and control of the 16 : 4 : 1 asymmetrical topology. A new analytical approach is introduced to find the complete information of the available combination of space vectors for any asymmetric ratio. A limit chart is introduced, which represents the number of ways to generate a particular space vector. Asymmetrical hexagonal decomposition technique is used to select the switching devices from the high-, medium-, and low-voltage cells to realize a space vector. The converter is simulated in MATLAB/Simulink. Supporting results from a laboratory prototype have confirmed the usefulness of the 16: 4: 1 asymmetrical configuration.

关键词： Asymmetric multilevel inverter asymmetrical hexagonal decomposition cascaded H-bridge limit chart overmodulation power quality space vector modulation technique

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Hybrid control of five-phase permanent magnet synchronous machine using space vector modulation

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TURKISH JOURNAL OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCES 2019年第2期27卷 921-938页

作者： Difi, Djamel Halbaoui, Khaled Boukhetala, Djamel Natl Polytech Sch Proc Control Lab Algiers Algeria Nucl Res Ctr Brine CRNB Power Elect Lab Djelfa Algeria

This paper aims to study the hybrid control of a five-phase permanent-magnet synchronous machine improved by the space vector modulation (SVM) technique. The torque ripples and currents will therefore be reduced. This control is based on the theory of hybrid dynamic systems (HDS), its discrete component is the voltage inverter which has a finite number of states controlling the continuous component that represents the machine. The results of the simulation made on MATLAB/Simulink are presented and discussed in order to check the performance of the strategy of the studied control. They show, in particular, the main advantages of this control manifesting the good dynamic of the electromagnetic torque and the robustness against the parametric variations.

关键词： Hybrid dynamic systems (HDS) hybrid control space vector modulation technique multiphase machine five-phase permanent-magnet synchronous machine robust control

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A novel approach of space vector modulation for cycloinverter using genetic algorithm

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IET POWER ELECTRONICS 2013年第8期6卷 1723-1731页

作者： Agarwal, Preeti Agarwal, Vineeta MNNIT Dept Elect Engn Allahabad Uttar Pradesh India

A novel approach has been made to calculate the switching angles for space vector modulation (SVM) technique, which is applied in a cycloinverter to generate high-frequency power output. The turn-on and turn-off times of SVM pattern are evaluated in such a way that the total harmonic distortion (THD) is minimised and the output voltage of cycloinverter approaches as close as possible to desired sinusoidal waveform. To accomplish this optimisation task, genetic algorithms (GAs) is used and THD is adopted in the proposed objective function. The lowest fitness value of this objective function decides the correct value of the switching angles. The switching strategy for the cycloinverter is presented on MATLAB-based time-domain simulations. Simulation results show that the proposed approach with GAs, is superior to the conventional SVM. The output waveforms and their spectrum are presented to show effectiveness of the proposed scheme. Simulated results are also validated with the experimental results.

关键词： genetic algorithms harmonic distortion power conversion harmonics PWM invertors cycloinverter genetic algorithm switching angle space vector modulation technique total harmonic distortion

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Control of Permanent Magnet Synchronous Generator for Large Wind Turbines

Control of Permanent Magnet Synchronous Generator for Large ...

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IEEE International Symposium on Industrial Electronics (ISIE)

作者： Busca, Cristian Stan, Ana-Irina Stanciu, Tiberiu Stroe, Daniel Ioan Univ Aalborg Dept Energy Technol Aalborg Denmark

ISBN: (纸本)9781424463916

Direct Torque Control (DTC) and Field Oriented Control (FOC) are the most dominant control strategies used in generators for wind turbines. In this paper both control methods were implemented on a Permanent Magnet Synchronous Generator (PMSG). The variable speed wind turbine with full scale power converter topology was chosen for design. Parameters from a 2 MW wind turbine were used for system modeling. All the components of the wind turbine system (WTS), except the DC-link and the grid site converter were implemented in MATLAB/Simulink. The pitch controller was used to limit the output power produced by the turbine. DTC and FOC strategies, using SVM were used to control the generator rotor speed. The performance of the two control strategies were compared after different tests have been carried out.

关键词： PMSG SVM direct torque control field oriented control machine vector control permanent magnet generators permanent magnet synchronous generator control pitch control power converter topology space vector modulation technique speed control synchronous generators torque control variable speed wind turbine velocity control wind turbines

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A novel sensorless 60°-clamping vector classification pwm technique for switching losses reduction in three-phase PFC converters

A novel sensorless 60°-clamping vector classification pwm t...

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15th IEEE Canadian Conference on Electrical and Computer Engineering

作者： Yazdani, D Bakhshai, AR Jain, P Joos, G Isfahan Univ Technol Dept ECE Esfahan Iran

ISBN: (纸本)0780377818

Performance criteria of three-phase PFC converters improve significantly with increasing the switching frequency, and highly depend on the control strategy used This paper introduces a novel sensorless 60degrees-clamping vector classification PWM technique for three-phase PFC converters. The proposed scheme needs no current sensor and extra calculation for identification the highest current carrying phase that must not be switched. In addition, classification algorithm offers exact positioning of the switching instants. with less computational efforts and therefore shorter sampling period and higher switching frequency are possible, when compared with conventional SVM algorithms. In addition, to reduce the switching and conduction losses a novel switching pattern is presented in this paper. Simulation results on PSCAD/EMTDC software program, confirm the validity of the analytical work.

关键词： space vector modulation technique rectifiers classification algorithm

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Five Phase Impedance Source VSI with the Capability of Delivering two Loads

Five Phase Impedance Source VSI with the Capability of Deliv...

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2023 IEEE International Conference on Power Electronics, Smart Grid, and Renewable Energy, PESGRE 2023

作者： Siva, Vulavakayala Raghuram, M. Singh, Aakash Singh, Santosh K Varanasi India

ISBN: (纸本)9798350310573

The main aim of this paper is to develop a new switching strategy to deliver power to two independent three phase loads operating at different frequencies. In this proposed topology, switched boost and quasi switched boost impedance networks are integrated with five phase inverter to improve the voltage gain profile at two independent loads operation. The shoot through period is inserted in the space vector pulse width modulation technique to implement the proposed strategies. Proposed topologies achieve high voltage gain and control two loads independently without disturbing the conventional inverter operation. In addition, the proposed topologies achieve a wide voltage gain range by controlling the shoot through period and modulation indexes. The Proposed converters are simulated in MATLAB to support the theoretical analysis. Simulation results show the effectiveness of the topologies. © 2023 IEEE.

关键词： space vector modulation technique switched boost impedance network three phase system VSI

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