PV System Efficiency Optimization by Adjusting MPPT Switching Frequency
In order to improve the efficiency of PV generation system,a strategy of adjusting MPPT switching frequency is proposed.First the three-level Boost topology is employed as the MPPT and its operation modes are studied in detail. Then the loss model of three-level Boost converter is derived through circuit modeling.The influence of maximum power point variation on PV system overall efficiency is analyzed based on loss model,and system efficiency is improved by ad-justing the MPPT switching frequency.The research results demonstrate that the proposed control strategy facilitates ef-fective improvement of PV system overall efficiency and is easy to implement with relatively low cost.