THD analysis of SPWM & THPWM Controlled Three phase Voltage Source Inverter (original) (raw)
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Pulse width modulation (PWM) technique is one of the vital issues for power electronic circuit control. A number of Pulse width modulation (PWM) techniques are increasingly applied in many new industrial applications that require superior performance. The most widely applied PWM technique for three-phase voltage source inverters are Sine Pulse Width Modulation (SPWM), Third Harmonic Injection Pulse Width Modulation (THIPWM) and Space Vector Pulse Width Modulation (SVPWM). SPWM is the most simple modulation technique that can realize easily in analog circuit. However, it has some drawbacks such as higher total harmonic distortion (THD), lower switching frequency and not capable in over modulation region. THIPWM and SVPWM both provide better THD compared to SPWM. SVPWM shows lower THD in over modulation region and in high frequency application compared to THIPWM. These three techniques are discussed, analyzed and compared in terms of modulation index, switching frequency and inverter input voltage in this paper. The modeling and simulation for all PWM techniques have been done by using MATLAB/SIMULINK and Origin 6.1. From the simulation results, SVPWM shows the best performance and meet IEEE 519 standard of current harmonics level.
SPWM and THPWM with Various Amplitude and Frequency Modulation of Three Phase VSI
International Research Journal of Engineering and Technology (IRJET), 2018
The intent of this paper is to analyze sine pulse width modulation(SPWM) and third harmonic pulse width modulation (THPWM). The purpose of adopting for different techniques of inverter design is to decrease the harmonic content from the output waves of voltage source inverter (VSI). Amplitude modulation and frequency modulation are varied to examine their effects. Third harmonic pulse width modulation has been observed as superior to sine pulse width modulation technique by simulation results. The simulations are carried out in MATLAB/SIMULINK.
International Journal of Recent Technology and Engineering (IJRTE), 2019
This paper describes the design of a 400 V, three-phase voltage source inverter system using Sinusoidal Pulse Width Modulation (SPWM) control technique. Pulse Width Modulation (PWM) is an internal control technique for inverters. The Sinusoidal Pulse Width Modulation (SPWM) technique is the type of PWM used in this work. The aim is to reduce the harmonic produced by the inverter. Current standards require that total harmonic distortion (THD) be minimal. A three-phase SPWM signal is implemented in order to create an output voltage which is closer to a true sine wave and reduce harmonics. The development and model were implemented using MATLAB Simulink soft-ware and hardware parameters. The addition of a low pass filter circuit aids the achievement of smoother sine waveforms and a reduced THD value of 0.17%. The proposed concept has been validated through experimentally on a laboratory prototype by using DSP TMS320F28335 real-time digital control. The experimental outcomes emphasize t...
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The sinusoidal Pulse Width Modulation (SPWM) technique is one of the most popular PWM technique for controlling output and harmonic reduction of inverter. Recent developments in power electronics and semiconductor technology have lead use of higher carrier frequency in PWM modulation techniques. In the presented work voltage source inverter is connected to the RL load with LC filter. Two PWM techniques have been used to operate voltage source inverter are sinusoidal(SPWM) PWM and third harmonic injection(THIPWM) PWM. The simulation result shows THIPWM has better performance when compared to SPWM Both techniques are shown with MATLAB simulink and compared in terms of THD.
2019
The sinusoidal Pulse Width Modulation (SPWM) technique is one of the most popular PWM technique for controlling output and harmonic reduction of inverter. Advancement in power electronics and semiconductor technology have led to use of higher carrier frequency in PWM modulation techniques. In the presented work voltage source inverter is connected to the RL load with LC filter of three phase inverter. Two PWM techniques have been used to operate voltage source inverter are sinusoidal(SPWM) PWM and third harmonic injection(THIPWM) PWM. Both techniques are studied and compared in terms of harmonics distortion.
PWM STRATEGY FOR THREE PHASE VOLTAGE SOURCE INVERTER WITH MINIMUM HARMONIC DISTORTION
IAEME Publication, 2020
In this paper, comparison between two different Pulse Width Modulation (PWM) techniques employed for three phase Voltage Source Inverter (VSI) is discussed. A suitable PWM technique is employed to obtain the required output voltage in the line side of the inverter. The PWM generation techniques used in this paper mainly based on Space Vector based Pulse Width Modulation (SVPWM) and Modified Space Vector based Pulse Width Modulation (MSVPWM). MSVPWM method involves the comparison of the three phase reference modulating signals with a common triangular carrier wave to generate the pulses for the three phases. Whereas, in SVPWM method, a revolving reference voltage vector is provided as voltage reference instead of three phase modulating waves. This paper analyses the two Pulse Width Modulation techniques for three phase VSI and the current THD is maintained at the level of below 5%. The two Pulse Width Modulation techniques for three phase Voltage source inverter are compared by the current THD values to select the method with lower THD values.
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Ijca Proceedings on International Conference on Emerging Frontiers in Technology For Rural Area, 2012
In this paper a new sinusoidal PWM inverter suitable for use with power MOSFETs is described.. The output waveforms in the proposed PWM inverter are investigated both theoretically and experimentally. The fundamental component of the three-phase line-to-line voltage is increased by about 15 percent above than that of the conventional sine-wave inverter. The sinusoidal PWM switching scheme allows control of the magnitude and the frequency of the output voltage. Therefore, the input to the PWM inverters is an uncontrolled, essentially constant dc voltage source. This switching scheme results in harmonic voltage in the range of the switching frequency and higher, which can be easily filtered out. This Paper proposes several carrier based modulation techniques for full bridge inverter. In this paper, various pulse width modulation techniques are implemented, which can minimize the total harmonic distortion and enhances the output voltages. The methodologies adopting the constant switching frequency, variable switching frequency multicarrier, phase shifted carrier pulse width modulation concepts are implemented in this paper. The above methodologies divided in to two techniques, triangular carrier and sawtooth carrier for gate signal generation. In this paper, simulation of three phase inverter using sawtooth waveform as carrier signal has been done. Another method using asymmetrical modulation technique with triangular waveform as a carrier signal has been done.
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This paper present internal control method, i.e. SPWM technique for the IGBT based inverter that can rely on a smaller harmonic with smoother voltage, but on the other hand it has more components and is more complex to control. Mainly inverter converts AC to DC power at a required voltage& frequency. It also minimizes the harmonic distortion at the inverter output. Analysis and design are done by Simulink software to verifying results.
IJRCAR, 2013
In the last decades, it has been observed that the harmonics distortions generated by the PV inverter are reduced by using Pulse with modulation technique. Harmonics reduction is the main consideration in three phase inductive load circuit.The performance of the three phase squirrel cage Induction motor was improved by the reduction of voltage harmonics and current harmonics. In this paper, the harmonic distortion of the three phase induction motor was measured in terms of THD by Simulation model and the results of the Multiple Pulse With Modulation and Sinusoidal Pulse With Modulation inputs were compared to find out the lowest THD value. By using the PWM technique on the Three Phase Induction motor there was reduction in the VTHD by 6. 98% and CTHD by 3.12%. By reducing the harmonics level we can increase the life time of motor, cables and capacitor.