Hi, I'm trying to simulate a grid connected Pv inverter model using fuzzy logic controller by generating pulse from Dq0 voltage component. For filter I used LCL filter. I need some help.
1. I'm putting 769V PV input but getting 885V output which is more than input. Output power is 25KW for 50KW input. I'm not using any MPPT method and calculated DC link capacitor for 700V and getting 885V as well on dc link. Is this a problem?
2. When I simulate I'm getting huge reactive power flowing. If I fix this using Three phase reactive load THD of current goes very high up and system efficiency decreases. How can this be solved?
3. D-axis voltage in pu is 0.85 and Q-axis voltage is -0.5 instead of 1 and zero. Need help in this area also.
Design and simulation of fuzzy controller for a grid connected stand alone PV system
December 2008, DOI: 10.1109/ICCCNET.2008.4787740
Dear Zahid,
You have control problem, you need to conceder the voltage synchronization with the grid.
it is better to use available model in matlab. And design your controller for that available model.
Dear Zahid Hasan ;
Some interesting papers :
Fuzzy logic control for a grid-connected PV array through Z-source-inverter using maximum constant boost control method
October 2018, Ain Shams Engineering Journal 9(4), DOI: 10.1016/j.asej.2018.10.001
Grid Connected Photovoltaic System with Fuzzy Logic Control Based MPPT
- Prince Jose, P. Jose
Best regards
- Badges
- Science topic