Optimized PID for Direct Power Control with an improved LCL filter design using GWO for Three-Phase Inverters

摘要

This paper presents analysis and control of three-phase inverter for renewable energies sources and for Micro-Grid (MG) purpose using the Direct Power Control (DPC). The proposed control is based on the variation of instantaneous active and reactive power errors in the virtual dq references frame and optimized Proportional-Integral-derivative (PID) controllers. Moreover, the grid synchronization is carried out using Double Second-Order Generalized Integrator (DSOGI) to ensure correct orthogonal signals generation. Also, a DC link voltage controller has been performed to ensure the power balance between the source and the power injected to the grid through LCL filter which parameters were also optimized. In this paper, a new objective function is formalized and proposed to enhance the generated power quality. The recent algorithm Grey Wolf optimizer is performed for the first time to resolve the optimization problems for the overall system.