| Title |
A Novel MPPT Control of PV MIC System Considering the Shaded Effect |
| Authors |
Jung-Sik Choi ; Dong-Hwa Chung |
| DOI |
http://dx.doi.org/10.5207/JIEIE.2012.26.5.021 |
| Keywords |
PV System ; MPPT Algorithm ; Output Error ; Shaded Effect ; Insolation ; Temperature |
| Abstract |
This paper presents the new maximum power point tracking(MPPT) control of the photovoltaic(PV) module integrated converter(MIC) system considering the shadow influence. The output characteristics of the solar cell is a nonlinear and affected by a temperature, the solar radiation and influence of a shadow. Particularly, MIC system is very sensitive to the shadow influence because the capacity is very small. In order to increase an output and efficiency of the solar power generation, the maximum power point(MPP) obeying control are necessary. Conventional perturbation and observation(PO) and Incremental conductance(IC) are the method finding MPP by the continued self-excitation vibration. The MPPT control is unable to be performed by rapid output change affected by the shadow. To solve this problem, the new control algorithm of the multi-level in which the step value changes by output change is presented. In case there are the solar radiation, a temperature and shadow influence, the presented algorithm treats and compares the conventional control algorithm and output error. In addition, the validity of the algorithm is proved. through the output error response characteristics. |