Turbine-Generator System with DC Output
AssigneeABB Schweiz AG
InventorsSandeep Bala, Darren Tremelling
Life of this patent
Estimating the term…
Abstract
A turbine generator system includes a doubly-fed alternating-current (AC) generator having a first poly-phase circuit (e.g., a stator circuit) and a second poly-phase circuit (e.g., a rotor circuit), a poly-phase AC-to-AC converter circuit coupled between the first and second poly-phase circuits, a poly-phase transformer having input windings coupled to the first poly-phase circuit and having output windings, and a uni-directional rectifier circuit coupled to the output windings of the poly-phase transformer and configured to convert poly-phase AC from the transformer output windings to direct current (DC).
Claims25
A turbine generator system, comprising:
- a doubly-fed alternating-current (AC) generator having a first poly-phase circuit and a second poly-phase circuit;
- a poly-phase AC-to-AC converter circuit coupled between the first poly-phase circuit and the second poly-phase circuit;
- a poly-phase transformer having input windings coupled to the first poly-phase circuit and having output windings;
- and a uni-directional rectifier circuit coupled to the output windings of the poly-phase transformer and configured to convert poly-phase AC from the transformer output windings to direct current (DC).
A power generation system comprising:
- a plurality of turbine generator systems configured to provide direct current (DC) power via respective DC buses;
- and
- a collection circuit connected to each of the DC buses and configured to combine the provided DC power;
- wherein each of one or more of the turbine generator systems comprises
- a doubly-fed alternating-current (AC) generator having a first poly-phase circuit and a second poly-phase circuit;
- a poly-phase AC-to-AC converter circuit coupled between the first poly-phase circuit and the second poly-phase circuit;
- a poly-phase transformer having input windings coupled to the first poly-phase circuit and having output windings;
- and a uni-directional rectifier circuit coupled to the output windings of the poly-phase transformer and configured to convert poly-phase AC from the transformer output windings to direct current (DC).
A method for direct-current (DC) power generation, the method comprising:
- providing a doubly-fed alternating-current (AC) generator having a first poly-phase circuit and a second poly-phase circuit and having a poly-phase AC-to-AC converter circuit coupled between the first poly-phase circuit and the second poly-phase circuit, such that the doubly-fed AC generator and the converter circuit are configured to provide a substantially fixed-frequency voltage output;
- increasing the voltage level from the substantially fixed-frequency voltage output sufficiently to provide power to a DC transmission line;
- converting the increased voltage to a direct-current (DC) voltage, using a rectifier circuit that is co-located with the doubly-fed AC generator and the converter circuit;
- and
- applying the DC voltage to a DC transmission line.
Dependencies are inferred from the claim text.