Dynamic brake circuit assembly for a wind turbine
First Claim
1. A power converter assembly for an electrical power system connected to a power grid, the power converter assembly comprising:
- a rotor-side converter configured for coupling to a generator rotor of a generator of the electrical power system;
a line-side converter electrically coupled to rotor-side converter via a DC link, the line-side converter configured for coupling to the power grid;
at least one sensor configured to monitor at voltage parameter of the DC link; and
,a dynamic brake assembly electrically coupled to the DC link, the dynamic brake assembly comprising a plurality of switching devices connected in parallel and a plurality of inductors electrically coupled between the plurality of switching devices,wherein, when the voltage parameter is at or above a voltage threshold, the dynamic brake assembly is configured to turn on such that the plurality of inductors receives at least part of a load generated by the power converter assembly.
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Accused Products
Abstract
A power converter assembly for an electrical power system connected to a power grid includes a rotor-side converter configured for coupling to a generator rotor of a generator of the electrical power system, a line-side converter electrically coupled to rotor-side converter via a DC link, and a dynamic brake assembly electrically coupled to the DC link. The line-side converter is configured for coupling to the power grid. The dynamic brake assembly includes a plurality of switching devices connected in parallel and a plurality of inductors electrically coupled between the plurality of switching devices.
53 Citations
20 Claims
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1. A power converter assembly for an electrical power system connected to a power grid, the power converter assembly comprising:
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a rotor-side converter configured for coupling to a generator rotor of a generator of the electrical power system; a line-side converter electrically coupled to rotor-side converter via a DC link, the line-side converter configured for coupling to the power grid; at least one sensor configured to monitor at voltage parameter of the DC link; and
,a dynamic brake assembly electrically coupled to the DC link, the dynamic brake assembly comprising a plurality of switching devices connected in parallel and a plurality of inductors electrically coupled between the plurality of switching devices, wherein, when the voltage parameter is at or above a voltage threshold, the dynamic brake assembly is configured to turn on such that the plurality of inductors receives at least part of a load generated by the power converter assembly. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A power converter assembly for an electrical power system connected to a power grid, the power converter assembly comprising:
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a rotor-side converter configured for coupling to a generator rotor of a generator of the electrical power system; a line-side converter electrically coupled to rotor-side converter via a DC link, the line-side converter configured for coupling to the power grid; at least one sensor configured to monitor at voltage parameter of the DC link; and
,a dynamic brake assembly electrically coupled to the DC link, the dynamic brake assembly comprising a plurality of switching devices connected in parallel and at least one resistance-inductance component electrically coupled between the plurality of switching devices, wherein, when the voltage parameter is at or above a voltage threshold, the dynamic brake assembly is configured to turn on such that the at least one resistance-inductance component receives at least part of a load generated by the power converter assembly.
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14. A method for controlling peak voltage of a DC link of a power converter of an electrical power system connected to a power grid with minimal switching losses, the method comprising:
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electrically coupling a dynamic brake assembly to a DC link of the power converter, the dynamic brake having a plurality of switching devices connected in parallel and a plurality of inductors electrically coupled between the plurality of switching devices; receiving a voltage measurement of the DC link of the power converter; comparing the voltage measurement of the DC link to a voltage threshold; when the voltage measurement is at or above the voltage threshold, turning on the dynamic brake assembly of the power converter such that the at least one inductor receives at least part of a load generated by the power converter. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification