Design Of Single Phase Inverter Research Articles

Optimization design of single phase inverter connected to the grid

In grid-connected photovoltaic systems significant improvements can be carried out in the design and implementation of inverters: reduction of harmonic distortion, elimination of the DC component injected into the grid and the proposed control. This paper proposes a control strategy based on PWM switching patterns for an inverter for photovoltaic system connected to the grid in order to control the injected current. The current injected must be sinusoidal with reduced harmonic distortion. An additional filter is designed to reduce high-order harmonics on the output side. This strategy exhibits the advantages: Simplicity, reduction of harmonics, size of the line filter, reduction of the memory requirements and power calculation for the control.

Design of single phase inverter for photovoltaic application controlled with sinusoidal pulse width modulation

<p>The application of fossil fuels likes coal, oil and gas gives the enormous environmental impact and hazardous effects to the earth. Hence, renewable energy has become the most tremendously friendly methods to generate the electricity without pollution and emissions. Inverter is a power electronics device which is used to convert Direct Current (DC) into Alternating Current (AC). The conventional inverter no longer fulfills the requirement of reducing harmonic distortions plus it causes global warming and greenhouse effect. For increasing the efficiency and reliability of the system, the PV inverter becomes a vital part in the conversion of DC to AC output. This research thus presents a single phase photovoltaic inverter controlled with sinusoidal pulse-width-modulation (SPWM) and low pass filter connection between the inverter and the utility grid to reduce the harmonics due to intermittent nature of the renewable energy sources. Unipolar and Bipolar switching scheme are applied to control the magnitude and frequency of output voltage and result of both unipolar and bipolar are compared. The simulation of the proposed technique is executed by using Matlab/Simulink.</p>

High Efficiency Single Phase Inverter Design

High Efficiency Single Phase Inverter Design

Design of Single Phase Inverter with Improved MPPT and Optimized Control for Solar Photovoltaic

Design of Single Phase Inverter with Improved MPPT and Optimized Control for Solar Photovoltaic

Design of single phase inverter using microcontroller assisted by data processing applications software

Inverter is widely used for industrial, office, and residential purposes. Inverter supports the development of alternative energy such as solar cells, wind turbines and fuel cells by converting dc voltage to ac voltage. Inverter has been made with a variety of hardware and software combinations, such as the use of pure analog circuit and various types of microcontroller as controller. When using pure analog circuit, modification would be difficult because it will change the entire hardware components. In inverter with microcontroller based design (with software), calculations to generate AC modulation is done in the microcontroller. This increases programming complexity and amount of coding downloaded to the microcontroller chip (capacity flash memory in the microcontroller is limited). This paper discusses the design of a single phase inverter using unipolar modulation of sine wave and triangular wave, which is done outside the microcontroller using data processing software application (Microsoft Excel), result shows that complexity programming was reduce and resolution sampling data is very influence to THD. Resolution sampling must taking ½ A degree to get best THD (15.8%).

Single phase inverter design based on selective harmonic elimination method

Minimization of harmonic distortions in voltage source inverters’ output wave form is very important. In this paper, a single phase inverter design that can change the operating frequency between 5 Hz – 50 Hz to achieve the keeping the voltage/frequency ratio (V/f) as constant during single phase asynchronous motor driving is presented. For the aim of minimizing the voltage harmonics, pulse width modulation (PWM) based selective harmonic elimination method (SHEM) is used in the design. Via this method, 3., 5., 7., 9., 11. and 13. harmonic components of the inverter output voltage are eliminated while regulating the amplitude of the main harmonic component. A practical application circuit is installed for the proposed design. The obtained results have shown that the proposed design is efficient in reducing of harmonic distortions.

Transformerless Single Phase Inverter Design for LCD Television

A LCD (liquid crystal display) has the CCFL (cold cathode fluorescent lamp) for backlight illumination. The CCFL is fed at high voltage and high frequency voltage by an inverter in the LCD TVs. The backlight unit consumes almost %40 of input power. The inverter with step-up transformer for this unit is commonly supplied from the switch mode power supply. In this work, a parallel resonance inverter without a step-up transformer is used to eliminate the transformer power loss. The circuit is analyzed in PSPICE package program and the results are compared with implementation.