Integration of Field-oriented and steady-state linear Kalman filter control in PMSG-based grid-connected system for improving Voltage Control and Power Balance Operation

The aim of this research study is to improve the dependability and effectiveness of the wind energy supply system by specifically examining the grid-connected permanent magnet synchronous generator system (PMSG). The proposed system requires the connection of a common DC-link with two converters arranged in a back-to-back arrangement. The machine-side Field Oriented Control (FOC) utilizes the rotor position and generator speed. In this closed-loop control system, the regulation of torque is achieved indirectly by adjusting the stator current. The control scheme is formulated within the synchronous DQ frame. On the grid side control, modifications are involved for regulating the reference current generation exhausting the Steady State Linear Kalman Filter (SSLKF) control algorithm, improving power quality issues in the inverter, and regulating DC-link voltage to accomplish smooth power transfer under steady-state and dynamic conditions. The framework with closed loops equalizes power between the inverter, grid, and load. In a grid-connected system, power equilibrium is established at the point that the wind speed drops below the cut-in threshold. This system has been constructed with PMSG, a grid-connected bidirectional converter, and a nonlinear load designed in MATLAB Simulink.