LCL Filter based Grid-tied Converter with Single Current Sensor Approach

Abstract

This work is dedicated to implementing a LCL filter-based grid-tied converter with a reduced sensor approach. A conventional system requires two grid-side current sensors, two capacitor-side voltage sensors, and two inverter-side current sensors. This paper has proposed a novel method that leads to a substantial reduction of the sensor. In this method, a single grid-side current sensor is required to perform the control methodology. In this technique, the grid current reference in the d-q axis is used for estimation of grid current in ß axis. As an outcome, the size, weight, cost, and complexity of the system are reduced. A comparative assessment is performed between the proposed system and the conventional system. The system offers a cost-efficient solution for grid integration. The proposed system is validated by simulation results obtained from Matlab/Simulink platform.