Abstract
Bulk electrical power generation is generated using fossil fuels which emit huge pollution which is a global constraint today. Non-conventional sources of energy are the alternative energy sources for power generation. Non-conventional sources like PV (photo-voltaic) system are used as power source now-a-days. Multi-level inverters (MLI) are dominating inverter circuits giving out voltage with less distortion eventually reducing voltage stress on switches and size of filter. This paper presents a MLI structure with five switches giving out five-level output from the inverter. PV system is used as source and boost converter amplifies the PV output voltage to desired value. The paper presents a simplified PWM (pulse width modulation) technique for PV fed five switch five-level inverter. The proposed system is developed and results are obtained using MATLAB/SIMULINK software. Results are presented for the system considering R-load and RL-load conditions.
Highlights
Fossil fuels can generate electrical power in bulk but emission of greenhouse gases is the global issue these days with using conventional fossil fuels
This paper presents a Multi-level inverters (MLI) structure with five switches giving out five-level output from the inverter
PV system is used as source and boost converter amplifies the PV output voltage to desired value
Summary
Fossil fuels can generate electrical power in bulk but emission of greenhouse gases is the global issue these days with using conventional fossil fuels. To reduce the carbon gases emission from conventional power plants, renewable energy sources is the best alternative to provide stability to power system reducing the power generation from conventional plants. General two-level inverters suffer from high distortion in output voltage. Two-level inverter impresses high stress on switching devices. This disadvantages leads to development of multi-level inverters [7-10]. As the level of output from inverter is increased, harmonic distortion is reduced and the stress across switch reduces reducing the switching losses. This paper presents a MLI structure with five switches giving out five-level output from the inverter. The paper presents a simplified PWM (pulse width modulation) technique for PV fed five switch five-level inverter. Results are presented for the system considering R-load and RL-load conditions
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