scholarly journals New three-dimensional space vector pulse width modulation of PV-AF system based on the gh$\gamma $ coordinate system

2015 ◽  
Vol 23 ◽  
pp. 2017-2029 ◽  
Author(s):  
Juan ZHOU ◽  
Malong LIU ◽  
Chen WEI ◽  
Chaoxu GAO ◽  
Xiaojie WU
Keyword(s):  
Coordinate System ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Dimensional Space ◽  
Three Dimensional ◽  
Space Vector ◽  
Three Dimensional Space

scholarly journals Classic Discrete Control Technique and 3D-SVPWM Applied to a Dual Unified Power Quality Conditioner

2019 ◽  
Vol 9 (23) ◽  
pp. 5087 ◽  
Author(s):  
Y. A. Garces-Gomez ◽  
Fredy E. Hoyos ◽  
John E. Candelo-Becerra
Keyword(s):  
Power Quality ◽  
Power Factor ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Dimensional Space ◽  
Three Dimensional ◽  
Discrete Control ◽  
Control Technique ◽  
Space Vector ◽  
Three Dimensional Space

The unified power quality conditioners (UPQCs) are useful to correct distortions in voltage and current waveforms in case of problems related to harmonics, flicker, and power factor. The dual topology of the UPQC allows a loop control in the inverters less demanding in terms of switching functions; however, the control techniques proposed in the literature have some disadvantages as large computation time and some calculation delays. Therefore, this paper presents the application of a classic discrete-time control model for a three-dimensional space vector pulse width modulation (3D-SVPWM) to be used with the dual UPQC, obtaining a fixed commutation frequency and a low computation cost. The results show that the applied method helps to reduce the harmonics in the source, voltage sags and load current and improve the power factor of the electrical circuit tested. Furthermore, the high frequency created by the switching of elements in the UPQC is filtered by the impedance of the power source and it does not represent a problem for the circuit. Due to the simplicity of the model, simulations demonstrate that the application of this classical control technique is enough to achieve good results to compensate harmonics and power factor with the dual UPQC. The development of the controllers is carried out by discretization of the transfer functions of the control in continuous time and their application with the three-dimensional space vector pulse width modulation (3D-SVPWM) technique.

FPGA Implementation of Three Dimensional SVPWM

2013 ◽  
Vol 392 ◽  
pp. 501-506
Author(s):  
S. Rajagopal ◽  
Sheba Charles ◽  
Priyanka Vedula ◽  
C. Bharatiraja ◽  
S.S. Dash
Keyword(s):  
Pulse Width ◽  
Output Voltage ◽  
Pulse Width Modulation ◽  
Dimensional Space ◽  
Three Dimensional ◽  
Reference Vector ◽  
Voltage Vector ◽  
Switching Action ◽  
Mathematical Equations ◽  
Three Dimensional Space

In this paper includes an approach to implement Three Dimensional Space Vector Pulse width Modulation (3D-SVPWM) for multilevel inverter/Converter. The Proposed 3D-SVM scheme finds the reference vector by using simple mathematical equations for selecting switching states without redundant switching vectors. Moreover, the proposed PWM strategy satisfies the constraint that the output voltage vector should be only changed by one switching action. Not requiring extra hardware, the NPC inverter with the proposed PWM results are remarkable. The proposed algorithm is simulated by MATLAB and Implemented by FPGA-DSP Processor.

A Fast Digital 3D-SVPWM Algorithm for Four-Leg Converter

2014 ◽  
Vol 541-542 ◽  
pp. 494-497
Author(s):  
Peng Xian Song ◽  
Ping Wang ◽  
Yao Hua Li
Keyword(s):  
Mathematical Model ◽  
Computer Simulation ◽  
Coordinate Transformation ◽  
Dimensional Space ◽  
Three Dimensional ◽  
Space Vector Pwm ◽  
Space Vector ◽  
Computational Burden ◽  
Three Phase ◽  
Three Dimensional Space

The three-phase four-leg converter can be obtained by adding a bridge into the traditional three-phase three-leg converter. The average mathematical model of three-phase four-leg converter is described in this paper. The three-dimensional space vector PWM (3D-SVPWM) is analyzed. For simplifying the modulation, a fast digital SVPWM algorithm which eliminates coordinate transformation and saves calculating time was proposed. The feasibility of the proposed modulation technique is verified by computer simulation. These results show that the proposed fast digital 3D-SVPWM technique can be easily implemented without conventional computational burden.

Three-Dimensional Space Vector Modulation Strategy for Capacitor Balancing in Split Inductor Neutral-Point Clamped Multilevel Inverters

2018 ◽  
Vol 27 (14) ◽  
pp. 1850232 ◽  
Author(s):  
Palanisamy Ramasamy ◽  
Vijayakumar Krishnasamy ◽  
Mohamed Ali Jagabar Sathik ◽  
Ziad M. Ali ◽  
Shady H. E. Abdel Aleem
Keyword(s):  
Dimensional Space ◽  
Computational Cost ◽  
Three Dimensional ◽  
Neutral Point ◽  
Space Vector Modulation ◽  
Space Vector ◽  
Field Programmable ◽  
Vector Modulation ◽  
Switching Method ◽  
Three Dimensional Space

Capacitor imbalance is one of the major drawbacks of a neutral-point clamped multilevel inverter (NPC-MLI). The capacitor imbalance rises due to the nonuniform switching, nonideal DC link capacitors, improper commutation, and various asymmetrical phase currents in switching states. The imbalance can be minimized by using proper switching using a redundancy switching method and avoiding the usage of medium vectors. The computational cost of this system is to be decided by the level of the inverter system. This paper presents a comprehensive three-dimensional space vector modulation (3D-SVM) strategy to eliminate the imbalance in the DC link capacitor voltage, which is across the applied input DC source. The technique is easy to implement without using any trigonometric functions, lookup tables, or angle determinations. This proposed scheme has been verified using MATLAB Simulink and authenticated using field-programmable gate array (FPGA) controller.

Sign in / Sign up

Export Citation Format

Share Document