Abstract
Grid-connected photovoltaic (PV) system has gained momentum at an exponential rate in recent years. Intermittent nature of PV system causing demand and generation mismatch in power is one major issue. Additionally, the quality of power supplied to the load and surplus power injected into the grid along with better dynamic performance are other two main issues of the grid-connected PV system. To address the problem of intermittency and dynamic performance we use battery energy storage (BES). Similarly, three-level neutral point clamped (NPC) inverter with LCL filter is used for better current and voltage waveforms to ensure the better-injected power quality. In this paper, PV array, boost converter, maximum power point tracking (MPPT) control, bidirectional converter, three-level NPC inverter, and their associated control system is designed and simulated in MATLAB/Simulink. The simulation results shows the injected current has 0.68% THD, faster system response, and generated power matches the load demand.
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