公开(公告)号：US09620960B2

公开(公告)日：2017-04-11

申请号：US15111001

申请日：2014-01-13

Applicant: ABB Schweiz AG

Inventor： Ritwik Majumder

IPC: H02J1/04 ,  H02J3/38 ,  H02J3/46 ,  H02J3/14 ,  H02J3/16

CPC classification number: H02J3/381 ,  H02J3/14 ,  H02J3/16 ,  H02J3/38 ,  H02J3/46 ,  Y02P80/14

Abstract: A method is performed by a control unit for controlling an energy storage configured for stabilizing a microgrid. The method includes: obtaining a local deviation signal related to a voltage and/or frequency deviation from a local reference, as measured at a local point of the microgrid where the energy storage is connected and able to inject real and/or reactive power into the microgrid for stabilizing said microgrid; obtaining a common deviation signal related to a voltage and/or frequency deviation from a common reference, as measured at a common point of the microgrid which is different from the local point, wherein the common deviation signal is configured to be identical to common deviation signal(s) obtained by other control units for controlling other energy storage(s) for stabilizing the microgrid; controlling the injection of real and/or reactive power by the energy storage into the microgrid based on the common deviation signal as long as the local deviation signal satisfies a first criterion; and switching from controlling the energy storage based on the common deviation signal to controlling the energy storage based on the local deviation signal in response to the local deviation signal satisfying a second criterion.