scholarly journals A random PWM control strategy for a three level inverter used in a grid connected photovoltaic system

2020 ◽  
Vol 11 (3) ◽  
pp. 1547
Author(s):  
Kamal Himour ◽  
K. Iffouzar
Keyword(s):  
Control Strategy ◽  
Control Structure ◽  
Active Power ◽  
Current Control ◽  
Multilevel Inverter ◽  
Photovoltaic System ◽  
Control Power ◽  
Control Signals ◽  
Simulation Results ◽  
Photovoltaic Generators

<p>The work presented in this paper is devoted to the control of a photovoltaic system connected to grid by a three level diode clamed inverter. A control structure based on three parts: dc link voltage control, power injected control and current control is proposed. In this work, the random PWM strategy is used to generate control signals for the multilevel inverter used us an interface to connect photovoltaic generators to the grid. Numerical simulations are performed using MATLAB / Simulink software, the simulation results for the proposed system indicate  the performances of the proposed control structure, minimization of harmonics by the random PWM strategy applied and injection to the grid more active power by the multilevel inverter structure.</p><p> </p>

Modelling and Simulation of 3-phase Transformerless Split Inductor Multilevel Inverter for Grid Connected Photovoltaic System

2013 ◽  
Vol 768 ◽  
pp. 75-79
Author(s):  
C. Bharatiraja ◽  
R. Palanisamy ◽  
Sushuruth Sadagopan ◽  
R. Latha ◽  
S.S. Dash
Keyword(s):  
Current Control ◽  
Modelling And Simulation ◽  
Multilevel Inverter ◽  
Photovoltaic System ◽  
Control Performance ◽  
Hysteresis Current Control ◽  
Common Mode Voltage ◽  
Operation Stability ◽  
Current Value ◽  
Simulation Results

A Split inductor is used with Exiting Inverter to interconnect inverter with grid connected system which avoids the usage of transformer. While using split inductor NPC-MLI shoot-through problems are producing in the bridge legs of an NPCTLI, its operation stability is ruined. Hysteresis Current Control (HCC) offers an excellent current control performance to NPCTLI. It acts based on the error current value i) and hysteresis band value (h). The proposed topology guarantees for no common-mode voltage, shoot-through possibility and capacitor balancing problem. Finally, the simulation results of a proposed SI-NPCTLI system verified using MATLAB SIMULINK.

scholarly journals Research and improvement of current control strategy of active power filter

2020 ◽  
Vol 619 ◽  
pp. 012069
Author(s):  
Huajun Wu ◽  
Yupeng Wang ◽  
Bo Liu ◽  
Lidong Chen ◽  
Gen Pei
Keyword(s):  
Control Strategy ◽  
Active Power Filter ◽  
Active Power ◽  
Current Control ◽  
Power Filter

scholarly journals New DTC strategy of multi-machines single-inverter systems for electric vehicle traction applications

2020 ◽  
Vol 11 (2) ◽  
pp. 641
Author(s):  
Taibi Ahmed ◽  
Hartani Kada ◽  
Allali Ahmed
Keyword(s):  
Electric Vehicle ◽  
Control Strategy ◽  
Control Structure ◽  
Synchronous Machines ◽  
Permanent Magnet Synchronous Machines ◽  
Structure Control ◽  
The Subject ◽  
Simulation Results ◽  
The Stability ◽  
Traction System

In high power traction system applications two or more machines are fed by one converter. This topology results in a light, more compact and less costly system. These systems are called multi-machines single-converter systems. The problems posed by different electrical and mechanical couplings in these systems (MMS) affect various stages of the systems and require control strategy to reduce adverse effects. Control of multi-machines single-converter systems is the subject of this paper. The studied MMS is an electric vehicle with four in-wheel PMS motors. A three-leg inverter supplies two permanent magnet synchronous machines which are connected to the front right and rear right wheels, and another inverter supplies the left side. Several methods have been proposed for the control of multi-machines single-inverter systems, the master-slave control structure seems best adapted for our traction system. In this paper, a new control structure based on DTC method is used for the control of bi-machine traction system of an EV. This new control has been implanted in simulation to analyze its robustness in the presence of the various load cases involved in our electric vehicle traction chain. Simulation results indicated that this structure control allowed the stability of the traction system.

Research on Predictive Current Control for Three-Level Four-Leg APF

2014 ◽  
Vol 1049-1050 ◽  
pp. 767-770
Author(s):  
Wen Bao Hou ◽  
De Lu Li
Keyword(s):  
Mathematical Model ◽  
Theoretical Analysis ◽  
Control Strategy ◽  
Neutral Current ◽  
Active Power Filter ◽  
Active Power ◽  
Current Control ◽  
Simulation Research ◽  
Power Filter ◽  
Voltage Balance

Taking three-level four-leg active power filter (APF) as research object, this paper establishes the corresponding mathematical model. In addition, the paper establishes the Matlab model based on predictive current control strategy, and then the theoretical analysis and simulation research are conducted. The simulation and experimental results show that the APF with predictive current control strategy can compensate harmonic current and neutral current well and make the two capacitors voltage balance effectively.

Detection Method and Control Strategy of Active Power for Wind Farm Connected into Grid

2013 ◽  
Vol 380-384 ◽  
pp. 2962-2966
Author(s):  
Chun Guang Tian ◽  
De Xin Li ◽  
Li Xia Cai ◽  
Tian Dong ◽  
Xiao Juan Han
Keyword(s):  
Control Strategy ◽  
Wind Farm ◽  
Detection Method ◽  
Control Strategies ◽  
Active Power ◽  
Detection Methods ◽  
Grid System ◽  
Simulation Results ◽  
And Control ◽  
Huge Challenge

As one of main clean energies, wind power has been developed fast, but the fluctuations of active power at a wind farm is a huge challenge for the grid system, thus it is essential for wind farm connected into grid to detection the active power. This paper studied control strategies and detection methods of the active power at a wind farm. Simulation results showed the effective detection of active power at a wind farm can improve the characteristics of the grid and the ability of wind farm to regulate the grid and increase the scheduled ability of wind farm.

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