| US 7,586,216 B2 | ||
| Redundant electrical brake and protection system for electric generators | ||
| Lei Li, Shanghai (China); Zhigang Lu, Shanghai (China); Ralph Teichmann, Albany, N.Y. (US); Changyong Wang, Shanghai (China); and Wenqiang Yang, Shanghai (China) | ||
| Assigned to General Electric Company, Niskayuna, N.Y. (US) | ||
| Filed on Jun. 02, 2006, as Appl. No. 11/421,912. | ||
| Prior Publication US 2007/0279815 A1, Dec. 06, 2007 | ||
| Int. Cl. H02P 13/00 (2006.01) | ||
| U.S. Cl. 307—151 [307/31; 307/38; 307/153; 388/920] | 17 Claims |
| 1. An electric power converter comprising:
a converter control unit;
a generator-side converter coupled to a stator bus via a generator contactor;
a grid-side converter;
a common direct current (DC) bus coupling the generator-side converter and the grid-side converter;
a dynamic brake coupled to the DC bus, the dynamic brake including a chopper connected across the DC bus and a dynamic brake
resistor connected between the chopper and the DC bus, the dynamic brake configured to dissipate excess electrical power in
the dynamic brake resistor in response to receiving a braking power dispatch signal from the converter control unit; and
a crowbar circuit coupled to the generator contactor via the stator bus, the crowbar circuit configured to engage a dump load
resistor coupled to the stator bus in response to receiving the braking power dispatch signal from the converter control unit,
the dump load resistor being rated for about a full power rating of the generator-side converter.
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