Method for operating a frequency converter of a generator and wind energy turbine having a generator operated according to the method
First Claim
Patent Images
1. Method for operating a frequency converter (26,26′
- ,26″
) of a generator (14,14′
,14″
) in particular of a wind energy turbine (10,10′
,10″
), in the event of a substantial grid voltage drop, wherein the frequency converter (26,26′
,26″
) comprises a generator-side power converter (32,32′
,32″
), to be connected to the generator (14,14′
,14″
), a grid-side power converter (28,28′
,28″
) to be connected to the voltage grid (18,18′
,18″
), and a DC link circuit (30,30′
,30″
) for connecting the generator-side power converter (32,32′
,32″
) to the grid-side power converter (28,28′
,28″
), the method comprising the step of generating the amount of reactive current to be supplied to the grid (18,18′
,18″
) by controlling the frequency converter (26,26′
,26″
) so as to generate reactive current.
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Accused Products
Abstract
The method for operating a frequency converter (26) of a generator (14) in particular of a wind energy turbine (10), in the event of a substantial grid voltage drop, wherein the frequency converter (26) comprises a generator-side power converter (32), to be connected to the generator (14), a grid-side power converter (28) to be connected to the voltage grid (18), and a DC link circuit (30) for connecting the generator-side power converter (32) to the grid-side power converter (28), comprises the step of generating the amount of reactive current to be supplied to the grid (18) by controlling the frequency converter (26).
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Citations
24 Claims
-
1. Method for operating a frequency converter (26,26′
- ,26″
) of a generator (14,14′
,14″
) in particular of a wind energy turbine (10,10′
,10″
), in the event of a substantial grid voltage drop, wherein the frequency converter (26,26′
,26″
) comprises a generator-side power converter (32,32′
,32″
), to be connected to the generator (14,14′
,14″
), a grid-side power converter (28,28′
,28″
) to be connected to the voltage grid (18,18′
,18″
), and a DC link circuit (30,30′
,30″
) for connecting the generator-side power converter (32,32′
,32″
) to the grid-side power converter (28,28′
,28″
), the method comprising the step ofgenerating the amount of reactive current to be supplied to the grid (18,18′
,18″
) by controlling the frequency converter (26,26′
,26″
) so as to generate reactive current. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 13)
- ,26″
-
10. Method for operating a frequency converter (26,26′
- ,26″
) of a generator (14,14′
,14″
) in particular of a wind energy turbine (10,10′
,10″
) under substantially normal grid condition and with the generator (14,14′
,14″
) not being in its operating state, wherein the frequency converter (26,26′
,26″
) comprises a generator-side power converter (32,32′
,32″
), to be connected to the generator (14,14′
,14″
), a grid-side power converter (28,28′
,28″
) to be connected to the voltage grid (18,18′
,18″
), and a DC link circuit (30,30′
,30″
) for connecting the generator-side power converter (32,32′
,32″
) to the grid-side power converter (28,28′
28″
), the method comprising the step ofcontrolling the amount of reactive current to be supplied to the grid (18,18′
,18″
) by controlling the grid-side power converter (28,28′
,28″
). - View Dependent Claims (11, 12)
- ,26″
-
14. Wind energy turbine (10,10′
- ,10″
) for generating power to be supplied to a grid (18,18′
,18″
), comprisinga rotor (12,12′
,12″
),a generator (14,14′
,14″
) operatively connected to the rotor (12,12′
,12″
),a frequency converter (26,26′
,26″
) electrically connectable to the generator (14,14′
,14″
) and the grid (18,18′
,18″
) and comprising a generator-side power converter (32,32′
,32″
) operatively connectable to the generator (14,14′
,14″
), a grid-side power converter (28,28′
,28″
) operatively connectable to the grid (18,18′
,18″
), and a DC link circuit (30,30′
,30″
) for connecting the generator-side power converter (32,32′
,32″
) to the grid-side power converter (28,28′
,28″
), anda control unit (38,38′
,38″
) for controlling the frequency converter (26,26′
,26″
) for generating reactive current to be supplied to the grid,wherein in the event of a substantial grid voltage drop, the control unit (38,38′
,38″
) controls the frequency converter (26,26′
,26″
) for generating the amount of reactive current to supplied to the grid (18,18′
,18″
). - View Dependent Claims (15, 16, 17, 18, 19, 20, 24)
- ,10″
-
21. Wind energy turbine for generating power to be supplied to a grid, comprising
a rotor (12,12′ - ,12″
),a generator (14,14′
,14″
) operatively connected to the rotor (12,12′
,12″
),a frequency converter (26,26′
,26″
) electrically connectable to the generator (14,14′
,14″
) and the grid (18,18′
,18″
) and comprising a generator-side power converter (32,32′
32″
) operatively connectable to the generator (14,14′
,14″
), a grid-side power converter (28,28′
,28″
) operatively connectable to the grid (18,18′
,18,18″
), and a DC link circuit (30,30′
,30″
) for connecting the generator-side power converter(32,32′
,32″
) to the grid-side power converter (28,28′
,28″
), anda control unit (38,38′
,38″
) for controlling the frequency converter (26,26′
,26″
) for generating reactive current to be supplied to the grid (18,18′
,18″
),wherein under normal grid condition but with the generator (14,14′
,14″
) not in its operating state, the control unit (38,38′
,38″
) controlled the grid-side power converter (28,28′
,28″
) of the frequency converter (26,26′
,26″
) for controlling the amount of reactive current to be supplied to the grid (18,18′
,18″
). - View Dependent Claims (22, 23)
- ,12″
Specification
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Current AssigneeGeneral Electric Company
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Original AssigneeGeneral Electric Company
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InventorsBarton, Werner, Buecker, Andreas
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Granted Patent
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Time in Patent OfficeDays
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Field of Search
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US Class Current290/44
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CPC Class CodesH02J 2300/28 The renewable source being ...H02J 3/1892 the arrangements being an i...H02J 3/381 Dispersed generatorsH02J 3/40 Synchronising a generator f...H02M 5/4585 having a rectifier with con...Y02E 10/76 Power conversion electric o...
