جستجوی مقالات مرتبط با کلیدواژه « ردیابی توان بیشینه » در نشریات گروه « برق »

In this paper, a new two-stage control algorithm to reach the maximum power point in photovoltaic (PV) systems under partially shaded conditions is presented. This algorithm tracks the maximum power point without any need to measure the open circuit voltage, short circuit current and making use of any extra switches. To achieve maximum power performance, the method firstly selects the relevant region of maximum power point based on received radiations from solar panels. After finding the correct power region, the accurate point of maximum power is reached by applying P&O method. Using this algorithm decreases the costs and also finds the MPP with more speed and accuracy at the first cycle. Performance validation of the proposed algorithm, is performed by running simulation on a typical system. The simulation results show the superior performance of the proposed approach in comparison with the conventional methods.

In this paper، a SEPIC (Single-Ended Primary Inductance Converter) with high efficiency has been proposed for photovoltaic applications. In the proposed converter، an auxiliary circuit without any additional switches has been used. The switch works under ZCS and ZVS conditions. No auxiliary switch was added to the circuit، thus any additional drive circuit is not needed. The proposed control system based on fuzzy logic method، has shown the smart accurate and faster tracking of the maximum power point، in different environmental conditions (radiation and temperature). Also، this controller delivers the maximum power to the load with adjusting the duty cycle of a converter. Finally، the simulation results were compared with experimental results to verify the theoretical calculation.