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。