Three phase control of power inverter using DQ transformation

日期 : Sep 2017 - May 2018

With the advancement of the technology in renewable energy sources DC-AC converters are gaining a lot of attention especially in third world countries and becoming a very hot topic for the researchers. These Renewable energy sources are not connected directly with conventional micro grids. For this purpose, DC-AC inverters are connected to the voltage. A power electronic filter along with control scheme A DQZ transformation technique is proposed as a new approach to improve the voltage stability of a DC-AC three phase inverter. The propose technique converts the three phases into two DC phases D phase and Q phase which includes all the information of three phases. These phases are compensated using PID control technique and provides a reference to the PWM of inverter. This feedback technique controls the voltages drop of inverter when a load is connected. Harmonics are removed using LC resonate filter technique in this way voltages are stabilized and harmonics are reduced to take the output voltage to maximum perfection.