Improving the Quality of Output Power of H Bridge Inverter by the Novel P.C.C Method
Mohammad Marjani1, Alireza Sedaghati2
Citation : Mohammad Marjani, Alireza Sedaghati, Improving the Quality of Output Power of H Bridge Inverter by the Novel P.C.C Method International Journal of Research Studies in Electrical and Electronics Engineering 2016 ,2(1) : 28-33
In the present paper, a novel Peak Current Mode Control is developed and simulated for singlephase H bridge inverter. Effective development current controller by low THD, fast and stable tracking for single phase inverter is not easy. However, some methods have been developed. In the present paper, a new controller is developed which meets international standards in terms of power quality. This paper concentrates on the main form of the H bridge inverter and the novel P.C.C method. In this method, two RS flip-flops are used. When the measured feedback current gets lower than the reference value, switches (2, 3) turn on and switches (1, 4) turn off. In this case, the inverter voltage undulates between 0 and V DC. But when the current reaches the reference value, switches (1, 4) turn off and switches (2, 3) turn on. In this case, the inverter voltage varies between 0 and -V DC. This makes the system unstable. In order to stabilize the inverter, a slope compensator saw tooth is added or removed from the controller. Then, two sinusoidal and square signals are added to the reference value. Inserting two L and LCL filters in the inverter output gives the desired sinusoidal waveform. Comparing these two filters reveals the superiority of LCL filter. Finally, using a PIS controller, 3rd, 5 th, and 7th harmonics are removed and the value of THD reaches 1%.