Operational Control of Two Maximum PowerPoint Trackers for Two String PhotovoltaicPanels in DC Distribution System

[摘要] In recent years the non-conventional energy sources is playing an important role in decreasing carbon emission and exhaustion of fossil fuel. The application of solar power and fuel cells is playing an important role for residential loads. In order to attain high consumption rate of the solar power, the maximum power point trackers will be considered for two string photovoltaic panels in a conventional 5-KW DC distribution system having voltage and current at maximum power as 35.4V and 4.94A which will be further coupled to ac grid with a bidirectional inverter. In this system, two PV strings and two MPPTs are implemented. The perturb and observe method is applied for maximum power point tracking for obtaining the current balancing of two MPPT modules in parallel. Perturb and observe method is compared with incremental conductance method and bidirectional inverter is replaced with multilevel inverter and results are obtained using MATLAB/ SimulinkSoftware.

[关键词] DC distribution system;Maximum Power point tracking;Photovoltaic (PV);solar power;Perturb and observe;incremental conductance.