公开(公告)号：US09331486B2

公开(公告)日：2016-05-03

申请号：US13668797

申请日：2012-11-05

Applicant: ABB Research Ltd

Inventor： Gerardo Escobar ,  Sami Pettersson ,  Leonardo-Augusto Serpa ,  Ngai-Man Ho ,  Antonio Coccia ,  Alexandre Oudalov ,  Adrian Timbus

IPC: H02J7/00 ,  H02J3/38

CPC classification number: H02J3/38 ,  H02J2003/388

Abstract: An exemplary method and apparatus for detecting islanding conditions of a distributed grid are disclosed, wherein transfer of power through a power electrical unit is controlled on the basis of a control reference. The apparatus includes a first stage and a second stage performing a respective portion of the method. The first stage injects a reactive component to the control reference, and, for at least one electrical quantity of the grid, determines a change in the quantity induced by the injected component, and determines, on the basis of the change in the electrical quantity, whether to move to the second stage of the method. The second stage, for at least one electrical quantity of the grid, determines a value of the electrical quantity, forms a positive feedback term using at the determined value adding a positive feedback term to the control reference, determines a change in an electrical quantity induced by the feedback term, and determines islanding condition on the basis of the change in the quantity induced by the feedback term.

Abstract translation: 公开了一种用于检测分布式电网的孤岛状况的示例性方法和装置，其中基于控制参考来控制通过电力单元的电力传输。 该装置包括执行该方法的相应部分的第一阶段和第二阶段。 第一阶段向控制基准注入无功分量，并且对于电网的至少一个电量来确定由所注入的分量引起的量的变化，并且基于电量的变化， 是否移动到第二阶段的方法。 第二阶段，对于电网的至少一个电量，确定电量的值，以确定的值形成正反馈项，将正反馈项添加到控制参考，确定引起的电量的变化 根据反馈项，根据反馈项引起的数量变化确定孤岛状态。

公开(公告)号：US09124127B2

公开(公告)日：2015-09-01

申请号：US13790899

申请日：2013-03-08

Applicant: ABB RESEARCH LTD

Inventor： Adrian Timbus ,  Alexandre Oudalov ,  Mats Larsson ,  Cherry Yuen

IPC: H02J9/06 ,  H02J3/38 ,  H02J13/00

CPC classification number: H02J9/06 ,  H02J3/381 ,  H02J13/0006 ,  H02J2003/388 ,  Y02B70/3216 ,  Y02E40/72 ,  Y02E60/74 ,  Y04S10/12 ,  Y04S10/30 ,  Y04S20/221 ,  Y10T307/344

Abstract: A method is provided for detecting islanding conditions in an electric power network which includes a plurality of sub-networks. The sub-networks include at least one power electrical unit and are separable from each other and a main grid supplying the network by switching devices. The method includes determining topological information of at least one sub-network of interest, detecting islanding conditions in at least one sub-network of interest on the basis of the topological information by using separate detecting devices for each sub-network of interest, and sending, on the basis of the islanding conditions detected by using the detecting devices, a disconnect signal to at least one power electrical unit in at least one sub-network of interest.

Abstract translation: 提供了一种用于检测包括多个子网络的电力网络中的孤岛状况的方法。 子网络包括至少一个电力单元，并且可以彼此分离，并且主网格由切换设备提供网络。 该方法包括确定感兴趣的至少一个子网络的拓扑信息，通过使用针对感兴趣的每个子网络的单独的检测设备，基于拓扑信息来检测至少一个感兴趣的子网络中的孤岛状态，以及发送 基于通过使用检测装置检测到的孤岛状态，在至少一个感兴趣的子网络中的至少一个电力单元的断开信号。