ENHANCEMENT OF POWER QUALITY IN A GRID CONNECTED UDE BASED PV INVERTER

The LCL filter is commonly used as a grid-to-grid interface. Nonetheless, due to the features of LCL filter and process uncertainties, designing a controller with proper parameters is complex. In this paper, with the LCCL filter, the order of the inverter control system can be reduced to first order from third order and a strategy for controlling the inverter connected to the grid based on uncertainty and disturbance estimator is proposed with LCCL filter. The main objective of this paper is to upgrade the efficiency of grid-connected PV inverters with proposed LCL filter.

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