Control of an ICBT converter
AssigneeABB Schweiz AG
InventorsAlexandre Christe, Yuhei Okazaki, Michele Luvisotto
Life of this patent
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Abstract
A voltage source converter as well as a method and computer program product for controlling the converter. The converter includes at least one phase leg connected between a first DC terminal having a first voltage and a second DC terminal having a second voltage, the phase leg including an upper arm and a lower arm with cells, where a junction between the arms is connected to a corresponding AC terminal. The converter also includes a control unit configured to control the cells to output a train of pulses of trapezoidal shape where the generation of a first control signal for a first cell used to initiate a transition between two levels of a pulse coincides with the decision that a transition is to be made.
Claims16
A voltage source converter comprising:
- at least one phase leg connected between a first DC terminal having a first voltage and a second DC terminal having a second voltage, the phase leg including an upper arm and a lower arm with cells, where the junction between the arms is connected to a corresponding AC terminal, the converter further including a control unit configured to:
- control the cells to output a train of pulses of trapezoidal shape where the generation of a first control signal for a first cell used to initiate a transition between two levels of a pulse coincides with the decision that a transition is to be made,
- wherein the decision that a transition is to be made is carried out through a comparison between a carrier and a reference performed for the first cell, which reference is a sinusoidal reference.
A method of controlling a voltage source converter comprising
- at least one phase leg connected between a first DC terminal having a first voltage and a second DC terminal having a second voltage, the phase leg including an upper arm and a lower arm with cells, where the junction between the arms is connected to a corresponding AC terminal, the method including the steps:
- controlling the cells of the phase leg to output a train of pulses of trapezoidal shape, where the generation of a first control signal for a first cell used to initiate a transition between two levels of a pulse coincides with a decision that a transition is to be made, and
- wherein the decision that a transition is to be made is carried out through a comparison between a carrier and a reference performed for the first cell, which reference is a sinusoidal reference.
A computer program product for controlling a voltage source converter having at least one phase leg connected between a first DC terminal with a first voltage and a second DC terminal with a second voltage, each phase leg including an upper arm and a lower arm with cells, where the junction between the arms is connected to a corresponding AC terminal, said computer program product also including a data carrier with computer program code configured to cause a control unit to, when said computer program code is loaded into said control unit,
- control the cells of the phase leg to output a train of pulses of trapezoidal shape, where the generation of a first control signal for a first cell used to initiate a transition between two levels of a pulse coincides with a decision that a transition is to be made, and
- wherein the decision that a transition is to be made is carried out through a comparison between a carrier and a reference performed for the first cell, which reference is a sinusoidal reference.
Dependencies are inferred from the claim text.