scholarly journals Research on Commutation and Coordination Control Strategy of Excitation Power Supply Based on Bidirectional Reduced Matrix Converter for Ion Accelerator

Energies ◽  
2018 ◽  
Vol 11 (12) ◽  
pp. 3396 ◽  
Author(s):  
Weizhang Song ◽  
Jiang Liu ◽  
Xiangdong Sun ◽  
Fenjun Wu ◽  
Daqing Gao ◽  
...  
Keyword(s):  
Control Strategy ◽  
Power Supply ◽  
Power Flow ◽  
Excitation Power ◽  
Input Power ◽  
Matrix Converter ◽  
Coordination Control ◽  
Current Harmonics ◽  
Ion Accelerator ◽  
Bidirectional Power Flow

The contribution of this paper is putting forward a kind of ion accelerator magnet excitation power supply with bidirectional reduced matrix converter (BRMC) as well as a coordination control strategy with bipolar current space vector modulation strategy, which is utilized to realize bidirectional power flow for a BRMC system to solve problems such as low input power factor, large input current harmonics and no bidirectional energy in the conventional ion accelerator magnet excitation power supply. Meanwhile, a hybrid commutation strategy combining the simplified three-step commutation with zero vector commutation was proposed to solve the commutation problem for a matrix-type first stage in BRMC. The feasibility and effectiveness of the proposed strategy, which can achieve bidirectional energy flow and safer commutation, have been verified by the experimental results.

scholarly journals Realization of SVM Algorithm for Indirect Matrix Converter and Its Application in Power Factor Control

2015 ◽  
Vol 2015 ◽  
pp. 1-10 ◽  
Author(s):  
Gang Li
Keyword(s):  
Power Factor ◽  
Power Flow ◽  
Experimental Tests ◽  
Input Power ◽  
Matrix Converter ◽  
Modulation Scheme ◽  
Space Vector ◽  
Zero Current Switching ◽  
Svm Algorithm ◽  
Bidirectional Power Flow

Compared with AC-DC-AC converter, matrix converter (MC) has several advantages for its bidirectional power flow, controllable power factor, and the absence of large energy storage in dc-link. The topology of MC includes direct matrix converter (DMC) and indirect matrix converter (IMC). IMC has received great attention worldwide because of its easy implementation and safe commutation. Space vector PWM (SVM) algorithm for indirect matrix converter is realized on DSP and CPLD platform in this paper. The control of the rectifier and inverter in IMC can be decoupled because of the intermediate dc-link. The space vector modulation scheme for IMC is discussed and the PWM sequences for the rectifier and inverter are generated. And a two-step commutation of zero current switching (ZCS) in the rectifier is achieved. Input power factor of IMC can be changed by adjusting the angle of the reference current vector. Experimental tests have been conducted on a RB-IGBT based indirect matrix converter prototype. The results verify the performance of the SVM algorithm and the ability of power factor correction.

Investigation and Analysis of Space Vector Modulation with Matrix Converter Determined Based on Fuzzy C-Means Tuned Modulation Indexs

2016 ◽  
Vol 6 (5) ◽  
pp. 1939 ◽  
Author(s):  
Ch. Amarendra ◽  
K. Harinadh Reddy
Keyword(s):  
Power Flow ◽  
Power Converter ◽  
Input Power ◽  
Matrix Converter ◽  
Space Vector Modulation ◽  
Space Vector ◽  
Fuzzy C Means ◽  
Sinusoidal Input ◽  
Vector Modulation ◽  
Bidirectional Power Flow

<p>Matrix converter performs energy conversion by directly connecting input phases with output phases through bidirectional switches. Conventional power converters make use of bulky reactive elements which are subjected to ageing, reduce the system reliability. The matrix converter (MC) stands as an alternative to conventional power converter. Furthermore MC’s provide bidirectional power flow nearly sinusoidal input and sinusoidal output waveform and controllable input power factor. In this work, three modulation methods have been simulated using MATLAB and compared on the basis of input current harmonics, output voltage harmonics and number of switching per cycle.  The three techniques simulated are, Optimal Venturini method, Direct Space Vector Modulation (DSVM) and Indirect Space Vector Modulation (ISVM) on Conventional Matrix Converter (CMC) and obtained form Fuzzy c-Means (FCM).  DSVM with FCM is proposed for obtainting best results compared to other three techniques.</p>

scholarly journals Investigation and Analysis of Space Vector Modulation with Matrix Converter Determined Based on Fuzzy C-Means Tuned Modulation Indexs

2016 ◽  
Vol 6 (5) ◽  
pp. 1939
Author(s):  
Ch. Amarendra ◽  
K. Harinadh Reddy
Keyword(s):  
Power Flow ◽  
Power Converter ◽  
Input Power ◽  
Matrix Converter ◽  
Space Vector Modulation ◽  
Space Vector ◽  
Fuzzy C Means ◽  
Sinusoidal Input ◽  
Vector Modulation ◽  
Bidirectional Power Flow

<p>Matrix converter performs energy conversion by directly connecting input phases with output phases through bidirectional switches. Conventional power converters make use of bulky reactive elements which are subjected to ageing, reduce the system reliability. The matrix converter (MC) stands as an alternative to conventional power converter. Furthermore MC’s provide bidirectional power flow nearly sinusoidal input and sinusoidal output waveform and controllable input power factor. In this work, three modulation methods have been simulated using MATLAB and compared on the basis of input current harmonics, output voltage harmonics and number of switching per cycle.  The three techniques simulated are, Optimal Venturini method, Direct Space Vector Modulation (DSVM) and Indirect Space Vector Modulation (ISVM) on Conventional Matrix Converter (CMC) and obtained form Fuzzy c-Means (FCM).  DSVM with FCM is proposed for obtainting best results compared to other three techniques.</p>

scholarly journals Model Predictive Control of the Input Current and Output Voltage of a Matrix Converter as a Ground Power Unit for Airplane Servicing

2021 ◽  
Vol 13 (17) ◽  
pp. 9715
Author(s):  
Zahra Malekjamshidi ◽  
Mohammad Jafari ◽  
Jianguo Zhu ◽  
Marco Rivera ◽  
Wen Soong
Keyword(s):  
Model Predictive Control ◽  
Predictive Control ◽  
Power Supply ◽  
Output Voltage ◽  
Harmonic Distortion ◽  
Experimental Tests ◽  
Input Power ◽  
Matrix Converter ◽  
Nonlinear Loads ◽  
Source Current

This paper deals with the design, control, and implementation of a three-phase ac–ac mobile utility power supply using a matrix converter for airplane servicing applications. Using a matrix converter as a compact direct ac-to-ac converter can provide savings in terms of the size and cost of a mobile power supply compared to common back-to-back converters. Furthermore, using the proposed direct matrix converter eliminates the need for bulky electrolytic capacitors and increases the system’s reliability and lifetime. A finite control set model predictive control is used to generate a high-quality 115 V/400 Hz output voltage and a low-harmonic-distortion source current with a unity input power factor for various load conditions, including balanced, unbalanced, linear, and nonlinear loads. The predictive strategy is used to control the output voltage and source current for each possible switching state in order to simultaneously track the references. To achieve a further reduction in the system’s size and cost, an active damping strategy is used to compensate for the instability caused by the input filter in contrast to the passive method. Experimental tests were conducted on a prototype matrix converter to validate the performance of the proposed control strategy.

scholarly journals A Three-Phase Bidirectional Grid-Connected AC/DC Converter for V2G Applications

2020 ◽  
Vol 2020 ◽  
pp. 1-12
Author(s):  
Jingang Han ◽  
Xiong Zhou ◽  
Song Lu ◽  
Pinxuan Zhao
Keyword(s):  
Electric Vehicles ◽  
Control Strategy ◽  
Power Flow ◽  
Reactive Power ◽  
Vehicle To Grid ◽  
Experiment Platform ◽  
Three Phase ◽  
Simulation And Experiment ◽  
Bidirectional Power Flow ◽  
The Mathematical Model

The smart grid and electric vehicles (EVs) are widely used all over the world. As the key role, the Vehicle-to-Grid (V2G) has been attracting increasing attention. The bidirectional grid-connected AC/DC converter is one of the indispensable parts in the V2G system, which can realize bidirectional power flow and meet the power quality requirements for grid. A three-phase bidirectional grid-connected AC/DC converter is presented in this paper for V2G systems. It can be used to achieve the bidirectional power flow between EVs and grid, supply reactive power compensation, and smooth the power grid fluctuation. Firstly, the configuration of V2G systems is introduced, and the mathematical model of the AC/DC converter is built. Then, for bidirectional AC/DC converters, the grid voltage feedforward decoupling scheme is applied, and the analysis of PI control strategy is proposed and the controller is designed. The system simulation model is established based on MATLAB/Simulink, and the experiment platform of the bidirectional grid-connected converter for V2G is designed in lab. The simulation and experiment results are shown, and the results evaluate the effectiveness of the model and the performance of the applied control strategy.

scholarly journals Reactive Power Transfer via Matrix Converter Controlled by the “One Periodical” Algorithm

Energies ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 665
Author(s):  
Tomasz Sieńko ◽  
Jerzy Szczepanik ◽  
Claudia Martis
Keyword(s):  
Power System ◽  
Power Flow ◽  
Reactive Power ◽  
Model Simulation ◽  
Input Voltage ◽  
Input Power ◽  
Matrix Converter ◽  
Control Procedure ◽  
Reactive Power Flow ◽  
The One

The article describes the application of a straight forward energy converter, a multiphase matrix converter (MC), as part of a device, connected parallel to the power grid, and able to supply variable reactive power flow to the power system. The research performed by authors included the development of control procedures for a multiphase MC, based on a new approach and power system (application) requirements. The multiphase MC structure (6 × 6, 12 × 12) was used since the proposed control procedure creates output as the combination of input voltages. The increased number of phases decreases the order of harmonics in the MC converter similarly as in multilevel converters. This manuscript concentrates on the mathematical analysis of MC work under the “one periodical” algorithm and links it introduces in the power system. The previously developed, spatial-temporal mathematical model of the MC was limited to the dominant (first) harmonic and applied between the grid and reactive load. The results obtained from the analysis of the model showed that, for the applied control procedure (one periodical algorithm), the output voltage is built only from positive or negative sequences of input voltage. Three cases were recognized where the sign input power factor depends on input voltage and control sequence as well as on the value of control frequency. The effects of the model simulation were compared to those obtained from the MATLAB simulation and from the real laboratory 30 kVA-rated model. The main factors analyzed during this research include the expected value and distortion of input current and sign of reactive input power.

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