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Analysis and design of a DQ controller for a 2. 5kW single phase full-bridge inverter is presented in this study with the final results implemented in a FPGA/DSP based digital controller board. This method begins with converting the grid current of the reference sinusoidal signal to a 90-degree phase angle and converting it to a DC signal using the clack conversion principle. The aim of this. . The invention provides a single-phase parallel grid-connected inverter based on DQ decoupling and PID control, and relates to the technical field of inverters; the current closed loop control without communication phase lock specifically comprises DQ-PLL phase lock and current closed loop without. . Using renewable energy resources implies developing a grid-connected inverter system to connect the electricity production for small-scale (below 10 KW) applications in a single-phase system. Further, a suitable current controller must be designed to enhance the system's tracking execution and. . This thesis proposes a different method of control for single phase inverters used in low and medium power DG systems. The new control method takes advantage of the well-known DQ transformation and analysis mostly employed for three phase converters' analysis and control design. Providing a. .