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公开时间: 2009-03-11      申请时间: 2008-10-22
申请人: UNIV CHONGQING

CN101383580A
patent for invention


标题(英语)

Low voltage traversing control method for double feeding wind power generator when short circuit failure of electric network


摘要(英语)

The invention discloses a low voltage ride-through control method of a doubly fed induction aero-generator, which is used when a power network has short circuit faults. The control method is characterized in that a rotor exciting voltage positive-sequence control current and a rotor exciting voltage negative-sequence control signal are respectively formed through limiting a rotor slip frequency current and a rotor (2-s) rated frequency current when the power network has faults, and a generator is utilized for realizing the attenuation of stator flux transient DC components and reducing the rotor side influences of the stator flux transient components, positive-sequence components and negative-sequence components. The control method has the advantages that no hardware protecting device is required to be added; under the condition that the power network has symmetrical and asymmetrical faults, the overcurrent occurrence of the rotor can be effectively restrained, and the safe operations of the generator and a rotor exciting converter are protected; in the process that the power network has the faults, the transient generator impact to the power network and a mechanical system can be effectively reduced; the normal operation of the generator can be fast recovered after the faults are removed, and the timely support to the power network can be realized.


申请人详细信息

序号 名称 数据格式
1 UNIV CHONGQING docdb

发明人详细信息

序号 名称 数据格式
1 YAO JUN docdb
2 DAWEI XIANG docdb
3 YONG LIAO docdb
4 REN LIU docdb

法律状态

序号 日期 法律代码 详细信息
1 20090311 C06 PUBLICATION
2 20090506 C10 ENTRY INTO SUBSTANTIVE EXAMINATION
3 20110406 C14 GRANT OF PATENT OR UTILITY MODEL
4 20131211 C17 CESSATION OF PATENT RIGHT

文档历史

公开时间: 2009-03-11
CN101383580A
申请时间: 2008-10-22
CN200810232909

CPC分类


IPC分类

H02P9/00

专利家族

40463257

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