Pilot control of a voltage source converter

摘要

An apparatus for controlling a converter has an ignition unit connected to power semiconductors in the converter and provides control signals for actuating the semiconductors. The apparatus has a control unit whose input is connected to measuring sensors providing actual values and whose output side is connected to the ignition unit. The control unit provides a reference variable for the ignition unit based on setpoint values and the actual values and the ignition unit actuates the power semiconductors such that the actual value corresponds to at least one of the setpoint values. A pilot unit has an output connected to the ignition unit and measures for calculating a step change reference variable for the ignition unit on the basis of at least one of the setpoint values. The ignition unit actuates the power semiconductors based on the step change reference variable.

主权项

1. A method for controlling a converter, connected to a DC voltage circuit and to phases of an AC voltage network, the converter having controllable power semiconductors, which comprises the steps of:
prescribing setpoint values for a control unit; sensing actual values on an AC voltage side of the converter using phase measuring sensors and supplying the actual values to the control unit; comparing in the control unit one of the actual values or a variable derived from the actual values with at least one of the setpoint values resulting in comparison results; providing the comparison results to a controller, the controller using the comparison results as a basis for producing a reference variable; transmitting the reference variable to an ignition unit, and the ignition unit actuating the controllable power semiconductors such that the actual values or a variable derived from the actual values corresponds to at least one of the setpoint values; and providing a pilot unit which takes parameters as a basis for calculating at least one step change reference variable and the step change reference variable is transmitted to the ignition unit, and the controllable power semiconductors are actuated on a basis of the step change reference variable; wherein the pilot unit interrupts a transmission of the reference variable from the control unit to the ignition unit and instead transmits the step change reference variable to the ignition unit.