Controller and method for energizing of the converter voltage source connected to the grid.

摘要

Controller and method for energizing of the converter voltage source connected to the electrical network the present invention relates to a controller and method for energizing (load) of the capacitor equivalent of BaRramento DC static voltage source converter (VSC) connected to an electric network.The circuit for energizing the VSC is composed of two switches of the type SCR (thyristor) forming a fourth arm of the VSC and connected to one of the phases of the electrical network on one side and connected to paralelWith the capacitor of the DC bus of the other side. During the process of energizing pulses trigger switches autocomutados (IGBTs) of the converter is blocked.An electromechanical switch formed by three single-phase switches to feed, independently, the circuit of the controller for energizing and one of the stages of the VSC.The angle of firing the SCR (thyristor) is used to control the amplitude of the load current of the capacitor of the DC bus.The voltage of the DC bus converter is increased in frequency of the electrical network as the shot angle of SCR (thyristor) in the energization circuit is varied.The control method of the power converter is based on the mathematical model of the equivalent circuit formed by the arm of the controller and one of the stages of the VSC.In addition to the mathematical modeling the control method includes the solution of the equation that models the dynamics of current in the circuit for energizing the converter.The determination of the shooting angles of the SCRs to regulate the maximum (peak) of the current for energizing the converter and the use of a mathematical function to approximate the curve relatingThe voltage of the DC bus converter with the shot angle of SCR (thyristor) of the circuit energizing.