| Title |
Development of Improved P&O Algorithm of PV System Considering Insolation variation |
| Authors |
Jung-Sik Choi ; Jae-Sub Ko ; Dong-Hwa Chung |
| DOI |
http://dx.doi.org/10.5207/JIEIE.2010.24.4.166 |
| Keywords |
PV System ; MPPT Algorithm ; Efficiency ; Insolation |
| Abstract |
The output characteristics of photovoltaic(PV) arrays are nonlinear and are affected by the temperature and solar insolation of cells. Maximum power point tracking(MPPT) methods are used to maximize PV array output power by tracking maximum power point(MPP) continuously. To increase the output efficiency of PV system, it is important to have more efficient MPPT. This paper proposes a novel maximum power point tracking(MPPT) control algorithm considering insolation to improve efficiency of PV system. The proposed algorithm is composed perturb and observe(P&O) method and constant voltage(CV) method. The proposed method is simulated under varying operating conditions. The effectiveness of these different MPPT methods is investigated thoroughly by PSIM simulation. The simulation results show that this proposed method provides better performance than conventional methods at a variable insolation without self-excited vibration of the power. By the simulation results, the validity of the proposed HB method is proved. |