公开(公告)号：US08674665B2

公开(公告)日：2014-03-18

申请号：US13125723

申请日：2010-07-23

申请人： Xiaojun Sheng ,  Zhihua Wang ,  Quanbo Xia ,  Jianyou Zeng ,  Dansheng Zhou ,  Ronghui Liao

发明人： Xiaojun Sheng ,  Zhihua Wang ,  Quanbo Xia ,  Jianyou Zeng ,  Dansheng Zhou ,  Ronghui Liao

IPC分类号： H02P9/04

CPC分类号： H02P9/007 ,  H02P9/102

摘要： The invention discloses a power grid fault ride-through device and a method for a doubly fed induction generator. The device comprises a controller and a crowbar circuit, the controller is in controlled connection with a generator-side converter and a grid-side converter of the doubly fed induction generator and the crowbar circuit, a three-phase input end of the crowbar circuit is connected with a connection end of a du/dt inductance and the generator-side converter, the crowbar circuit comprises a switch circuit and a drive circuit which is in driving connection with the switch circuit, the controller is in controlled connection with the drive circuit, the switch circuit comprises a bridge circuit comprising full-controlled power electronic devices as constituent elements, and a three-phase input end of the switch circuit is connected to the three-phase input end of the crowbar circuit; and with the device, the method comprises the following steps of closing the generator-side converter and triggering the conduction of the switch circuit in case that a power grid dips to the condition that rotor current is equal to or larger than a conduction threshold value, and switching off the switch circuit in case that rotor current is equal to or smaller than a switch-off threshold value. The invention prolongs the service life of the crowbar circuit and improves the working reliability of the crowbar circuit, and has simple structure and easy implementation.

摘要翻译： 本发明公开了一种电网故障穿越装置和双馈感应发电机的方法。 该装置包括控制器和撬棍电路，控制器与双馈感应发电机和撬棒电路的发电机侧转换器和电网侧转换器控制连接，撬棒电路的三相输入端为 与du / dt电感的连接端和发生器侧转换器相连，撬棒电路包括开关电路和与开关电路驱动连接的驱动电路，控制器与驱动电路控制连接， 开关电路包括作为组成元件的全控电力电子装置的桥式电路，开关电路的三相输入端连接到短路电路的三相输入端; 并且利用该装置，该方法包括以下步骤：在电网下降到转子电流等于或大于导通阈值的条件的情况下闭合发电机侧转换器并触发开关电路的导通， 并且在转子电流等于或小于关断阈值的情况下关断开关电路。 本发明延长了撬棒电路的使用寿命，提高了撬棒电路的工作可靠性，结构简单，易于实现。

公开(公告)号：US20110215772A1

公开(公告)日：2011-09-08

申请号：US13125723

申请日：2010-07-23

申请人： Xiaojun Sheng ,  Zhihua Wang ,  Quanbo Xia ,  Jianyou Zeng ,  Dangsheng Zhou ,  Ronghui Liao

发明人： Xiaojun Sheng ,  Zhihua Wang ,  Quanbo Xia ,  Jianyou Zeng ,  Dangsheng Zhou ,  Ronghui Liao

IPC分类号： H02P9/10

CPC分类号： H02P9/007 ,  H02P9/102

摘要： The invention discloses a power grid fault ride-through device and a method for a doubly fed induction generator. The device comprises a controller and a crowbar circuit, the controller is in controlled connection with a generator-side converter and a grid-side converter of the doubly fed induction generator and the crowbar circuit, a three-phase input end of the crowbar circuit is connected with a connection end of a du/dt inductance and the generator-side converter, the crowbar circuit comprises a switch circuit and a drive circuit which is in driving connection with the switch circuit, the controller is in controlled connection with the drive circuit, the switch circuit comprises a bridge circuit comprising full-controlled power electronic devices as constituent elements, and a three-phase input end of the switch circuit is connected to the three-phase input end of the crowbar circuit; and with the device, the method comprises the following steps of closing the generator-side converter and triggering the conduction of the switch circuit in case that a power grid dips to the condition that rotor current is equal to or larger than a conduction threshold value, and switching off the switch circuit in case that rotor current is equal to or smaller than a switch-off threshold value. The invention prolongs the service life of the crowbar circuit and improves the working reliability of the crowbar circuit, and has simple structure and easy implementation.

摘要翻译： 本发明公开了一种电网故障穿越装置和双馈感应发电机的方法。 该装置包括控制器和撬棍电路，控制器与双馈感应发电机和撬棒电路的发电机侧转换器和电网侧转换器控制连接，撬棒电路的三相输入端为 与du / dt电感的连接端和发生器侧转换器相连，撬棒电路包括开关电路和与开关电路驱动连接的驱动电路，控制器与驱动电路控制连接， 开关电路包括作为组成元件的全控电力电子装置的桥式电路，开关电路的三相输入端连接到短路电路的三相输入端; 并且利用该装置，该方法包括以下步骤：在电网下降到转子电流等于或大于导通阈值的条件的情况下闭合发电机侧转换器并触发开关电路的导通， 并且在转子电流等于或小于关断阈值的情况下关断开关电路。 本发明延长了撬棒电路的使用寿命，提高了撬棒电路的工作可靠性，结构简单，易于实现。