Abstract
ABSTARCT
In this paper the study of a three phase SEIG system under steady state condition is presented. In order to obtain self excitation, a voltage source inverter (VSI) supported by a battery energy storage system and based on sinusoidal pulse width modulation (SPWM) strategy is used. The output generated voltage and frequency are adjusted by changing modulation index (M). The relationship between the modulation index (M) and (dc) battery voltage source has also been found in order to regulate the value of terminal voltage. This system has been also examined with the existence of capacitor located at the D.C link side of the inverter, electronic load has been used to absorb the excess power and also to limit the DC voltage across the capacitor from exceeding the limit , while the generated terminal voltage is fixed by adjusting the modulation index.
As a result the terminal voltage and frequency fluctuation due to load and speed changes are eliminated. The generated voltage waveform is sinusoidal with (THD) less than (4%), keeping power quality within the international standards. both simulation and experimental results are in agreement with objectives of this research
