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This paper presents a study of determining the optimum operating parameters of a unipolar PWM inverter. Variations on the input voltage level and switching frequency will be investigated to see their impacts on the operation of the inverter and harmonics produced. Results through experimental approach show that careful selections of inverter parameters yield inverter's operation with highest efficiency...
This paper presents a unique technique suitable for the generation of variable frequency sinusoidal waveforms with high quality. Arithmetic operations on the bit streams are performed through digital blocks. The proposed technique is simple and can be implemented on an field programmable gate array (FPGA). Results of a prototype single-phase inverter module with custom built power stage, are presented...
This paper presents development of 200 kW grid connected PV inverter. 200 kW Grid connected PV inverter has the utility frequency transformer for the galvanic isolation between DC and AC, and its output is 3-phase 3-wire 60 Hz, 380 V. P&O algorithm is used for the maximum power point tracking (MPPT) and the active frequency drift scheme for the antiislanding protection. The inverter is controlled...
In the paper, a carrier based two-state PWM technique will be proposed. This method is advantageous for reducing switching losses compared with conventional PWM techniques. Compared with single-state PWM method, it can achieve a better linear control characteristic and harmonic distortion performance. The carrier based PWM approach of the proposed method justifies a flexibility of carrier techniques...
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