High efficiency THIPWM three-phase inverter for grid connected system (original) (raw)
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Simulation of grid connected THIPWM-three-phase inverter using SIMULINK
2011 IEEE Symposium on Industrial Electronics and Applications, ISIEA 2011, 2011
This paper presents a grid connected system. Three phase DC-AC inverters used to convert the regulated DC power to AC power suitable for grid connection. Third harmonic injection PWM (THIPWM) was employed to reduce the total harmonic distortion (THD) and for maximum use of the voltage source. the accurate generation of THIPWM minimize the THD and make the inverter suitable for grid connection, by synchronizing the inverter voltage with the grid voltage. The application of THIPWM to inverter increases efficiency of the inverter. Simulation results validate the developed model and the proposed system. http://ieeexplore.ieee.org/xpls/abs\_all.jsp?arnumber=6108683
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.
Aalborg Universitet Improved control strategy for the three-phase grid-connected inverter
An improved control strategy for the three-phase grid-connected inverter with space vector pulse width modulation (SVPWM) is proposed. When the grid current contains harmonics, the d-and q-axis grid currents will be interacted, and then the waveform quality of the grid current will be poorer. As the reference output voltage cannot directly reflect the change of the reference grid current, the dynamic response of the grid-connected inverter is slow. In order to solve the aforementioned problems, the d-and q-axis grid currents in the decoupled components of the grid current controller can be substituted by the d-and q-axis reference grid currents, respectively. The operating principles of the traditional and proposed control methods are illustrated.
Implementation of three-phase grid connected inverter for photovoltaic solar power generation system
Power System Technology, 2002. …, 2002
Detailed analysis, simulation and hardware results of a new solar photovoltaic inverter configuration interconnected to the grid are presented. From the simulation and experimental results it is confirmed that the harmonic distortion of the output current waveform of the inverter fed to the grid is within the stipulated limits laid down by the utility companies. To harvest the vast solar energy, it would be desirable if the energy conversion units are simple, reliable, and of low cost and high efficiency. High efficiency can be achieved by the use of all the power generated for the unit and even contribute to the gird while the energy is not used. http://ieeexplore.ieee.org/xpls/abs\_all.jsp?arnumber=1053607&tag=1
2011 - Implementation of Three-phase grid-connected
Three-phase voltage-source inverters (VSI) have been widely applied for distributed generation (DG) systems. In this paper, a three-phase grid-connected inverter has been implemented using DSP-TMS320LF2407A microprocessor. The current controller strategy, namely hysteresis current control, has been employed as an inverter control strategy. Energy from small and medium scale wind turbines, fuel cells and solar cells can be absolutely injected to the grid by means of this inverter. The results of experimental tests confirm that the quality of injected power is in accordance with IEEE standard (THD<5%). Considering features of utilized switches, driver boards, interface board and protection system, the implemented set is capable of injecting 30 kW power to the grid.
Simulation of three-phase grid tied inverter
2017 2nd International Conference for Convergence in Technology (I2CT), 2017
ARTICLE INFO This paper introduces a MATLAB simulation of 3 phase grid tied inverter which synchronizes with grid as per grid requirement. The solution of this simulation proposes is an implementation of the designed filter to effectively reduce the harmonics injected into the grid to an acceptable value according to standards and also an approach to control power quality of the distribution system. The focus is on designing inverter which will synchronize with grid. The design and analysis of the grid synchronization method are described in detail. Simulated results validate the effectiveness of synchronizing ability.
THD analysis of SPWM & THPWM Controlled Three phase Voltage Source Inverter
International Research Journal of Engineering and Technology (IRJET), 2017
The aim of this paper is to determine the Total harmonic distortion (THD) of three phase voltage source inverter (VSI) fed R-L load. The modulation Techniques used is Sinusoidal pulse width modulation (SPWM) and third harmonic pulse width modulation (THPWM). The Carrier frequency is varied to analyze its effect on Current THD and Voltage THD.This paper also presents the comparison of SPWM and THPWM controlled Inverter in terms of THD. The simulation result shows THPWM has better performance when compared to SPWM. The simulation of circuit is done by using MATLAB/Simulink.
Investigation of Three-Phase Grid-Connected Inverter for Photovoltaic Application
This paper describes the investigation of the grid-connected three-phase inverter for photovoltaic (PV) application. The inverter control system modeling is carried out in MATLAB/SIMULINK environment. With the aids of the proportional-integral controllers, sinusoidal pulse-width modulation (SPWM) control technique and Park transformation, the inverter control system managed to convert PV power to ac power, stabilize the output voltage and current, and feeds the excess power to the utility grid. The control system generates the PWM signals for power devices, the insulated gate bipolar transistors in order to regulate the output voltage and current. In addition, the system is simulated with the PV simulator in order to facilitate the real PV power that to be fed to the input of the inverter. The control system produced 2.48% and 4.64% of output voltage and current total harmonic distortion, respectively. The simulation results such as the ac output voltages and currents, inverter system power flow, and grid disturbances detection signals, proved the effectiveness of the developed control algorithm. For the validation, this model is to be linked to the inverter prototype by utilizing the dSPACE controller.
2019
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.
Development of Solar PV Based Grid Connected Inverters
The conventional line commutated ac-to-dc converters/ inverters have square-shaped line current which contains higher-order harmonics. Moreover, it requires a costly and bulky dc inductor/ choke. The line current with the high harmonic contents generates EMI and therefore it causes more heating of the core of distribution/ power transformers. Alternatively, PWM based inverters using MOSFET/IGBT switches can be used for the above purpose. However, apart from higher switching losses, the power handling capability and reliability of these devices are quite low in comparison to thyristors/ SCR. A thyristor based forced commutated inverters are not suitable for PWM applications due to the problems of commutation circuits. A pure sinusoidal voltage output or waveform with low harmonic contents is most desirable in the conversion from dc to ac. In the present work, a novel two pulse line commutated inverter is been proposed. It improves the wave shape hence it reduces the total harmonic distortion (THD) of the grid interactive-inverter. Moreover, the performance of the proposed circuitry is far better than the conventional line-commutated inverter. It reduces THD, number of thyristors and dispenses with the bulky dc inductor/ choke. The simulation of the circuit is done using SIMULINK software. Finally, the circuit is realized and experimental results verify the performance of the circuit.