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

摘要

Controller and method for tagging of the converter voltage source connected to the electrical network the present invention relates to a controller and method of lockout / tagout (discharge) and power (load)The equivalent of the DC bus capacitor of a converter voltage source (VSC) connected to an electric network.The circuit of lockout / tagout / energization of VSC is composed of two switches of the type SCR (thyristor) connected in antiparalelo connected in one of the terminals of the converter to be energized / desenerWorked out.A switch three pole type electromechanical or solid state, formed by three single-phase switches to feed, independently.The circuit of the controller of energizing / lockout / tagout and two stages of VSC.The angle of firing the SCR (thyristor) is used to control the amplitude of the discharge current of the capacitor of the DC bus.During the process of lockout / tagout switches autocomutados (IGBTs) are triggered in synchronism with the SCRs.The voltage of the DC bus converter is reduced as the shot angle of SCR (thyristor) of the circuit to lockout / tagout is decreased.The control method of the controller tagging is based on the mathematical model of the equivalent circuit formed by SCR and the two phases 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 to lockout / tagout of converter.The determination of the shooting angles of the SCRs to regulate the maximum (peak) of the current tagging of the converter and the use of a mathematical function to approximate the curve relatedIn the DC bus voltage of the converter with the shot angle of SCR (thyristor) in the circuit to lockout / tagout.