Matlab/Simulink Model of Space Vector PWM for Three-Phase Voltage Source Inverter

Abstract

Variable voltage and frequency supply to ac drives is invariably obtained from a three-phase voltage source inverter (VSI). A number of Pulse width modulation (PWM) scheme is used to obtain variable voltage and frequency supply. The most widely used PWM schemes for three-phase VSI are carrier-based sinusoidal PWM and space vector PWM (SVPWM). There is an increasing trend of using space vector PWM (SVPWM) because of their easier digital realisation and better dc bus utilisation. This paper focuses on step by step development of MATLAB/SIMULINK model of SVPWM. Firstly model of a three-phase VSI is discussed based on space vector representation. Next simulation model of SVPWM is obtained using NIATLAB/SIMULINK. Simulation results are also provided.

Control Strategy Used in DFIG and PMSG Based Wind Turbines an Overview

“…The output voltage from VSI utilizing SPWM technique is 0.5Vdc (peak) or 0.353 rms. Whereas the output voltage from VSI utilizing SVPWM improves by 15.15%.The dc bus utilization is more efficient in SVPWM technique, there is a degree of freedom of space vector placement in a switching cycle [35]- [36]. The common block of SVPWM are low-pass bus filter, three phase generator, ramp generator, alpha beta transformation, switching time calculator, αβ vector sector gates logic.…”

Analytical model of a wind energy AC-DC-AC scheme

“…..... (2) When the wind speed increases from v 1 to v 2 then the increase in wind power accelerates the rotor shaft until steady is realized or until wind speed changes again. The angular velocity w 1 at the end of the small time step can be obtained from…”

Simulation and Comparison of 2-L & 3-L Inverter Fed Induction Motor DTC Drives

“…However it has some draw backs like torque ripple, variable switching frequency, electromagnetic compatibility due to high frequency harmonic current and voltage. In recent years, research is going on DTC for multi level converters [5,6,9] attractive solution for high power applications, due to higher voltage operation capability, reduced common mode voltages, near sinusoidal outputs, low dv/dt's and smaller or even no output filter [4]. The most attractive features of this technology are in the medium to high-voltage application range (2-13 kV), which include motor drives, power distribution, power quality and power conditioning applications [13].…”

“…The high-voltage switches are rather expensive, the employment of the double number of the cheaper switches are often economical favorable. Simultaneously the less IM current and torque distortions can be achieved by using of the more number of the feasible inverter states [9].…”

“…The high-voltage switches are rather expensive, the employment of the double number of the cheaper switches are often economical favorable. Simultaneously the less IM current and torque distortions can be achieved by using of the more number of the feasible inverter states [9].In this paper two different DTC schemes will be compared with each other. These two schemes are DTC-SVM with two-level inverter and DTC-SVM with threelevel inverter.…”