公开(公告)号：US20190049497A1

公开(公告)日：2019-02-14

申请号：US16155161

申请日：2018-10-09

Applicant: ABB Schweiz AG

Inventor： Silvia Mastellone ,  Peter Al-Hokayem ,  Pietro Raboni

IPC: G01R27/16 ,  H02J3/38 ,  G06F17/50 ,  G01R19/165 ,  G01R31/42

Abstract: A method for islanding detection in an electrical power grid supplied by an electrical power source. The method includes measuring an output voltage (Vpcc) and a grid current (Ig) at an interconnection point of the power source with the power grid; estimating at least one grid parameter from the output voltage (Vpcc) and the grid current (Ig) based on optimizing a cost function, which minimizes a difference between the measured output voltage (Vpcc) and an estimated output voltage or a difference between the measured grid current (Ig) and an estimated grid current, which estimated output voltage or estimated output current is a function of the measured grid current (Ig) or the measured output voltage (Vpcc) and the least one estimated grid parameter; and detecting an islanding condition by detecting a jump and/or a deviation in the at least one estimated grid parameter.

公开(公告)号：US10852336B2

公开(公告)日：2020-12-01

申请号：US16155161

申请日：2018-10-09

Applicant: ABB Schweiz AG

Inventor： Silvia Mastellone ,  Peter Al-Hokayem ,  Pietro Raboni

IPC: G01R27/16 ,  G06F30/20 ,  H02J3/38 ,  G01R19/165 ,  G01R31/42

Abstract: A method for islanding detection in an electrical power grid supplied by an electrical power source. The method includes measuring an output voltage (Vpcc) and a grid current (Ig) at an interconnection point of the power source with the power grid; estimating at least one grid parameter from the output voltage (Vpcc) and the grid current (Ig) based on optimizing a cost function, which minimizes a difference between the measured output voltage (Vpcc) and an estimated output voltage or a difference between the measured grid current (Ig) and an estimated grid current, which estimated output voltage or estimated output current is a function of the measured grid current (Ig) or the measured output voltage (Vpcc) and the least one estimated grid parameter; and detecting an islanding condition by detecting a jump and/or a deviation in the at least one estimated grid parameter.

公开(公告)号：US10116234B2

公开(公告)日：2018-10-30

申请号：US15386511

申请日：2016-12-21

Applicant: ABB Schweiz AG

Inventor： Pietro Raboni ,  David Martini ,  Silvia Mastellone ,  Stefan Almer

IPC: H02M7/44 ,  H02M1/14 ,  H02M1/32 ,  H02J3/38 ,  H02M7/5387

Abstract: A DC/AC converter is provided with a new control device and method for managing inrush current transients during operation without requiring additional external devices or emergency operating modes forcing the DC/AC converter to shut down. The present invention is particularly, but not exclusively, aimed at grid connected DC/AC, converters, often subject to inrush current phenomena due to perturbations in the grid.

公开(公告)号：US20170187303A1

公开(公告)日：2017-06-29

申请号：US15386511

申请日：2016-12-21

Applicant: ABB Schweiz AG

Inventor： Pietro Raboni ,  David Martini ,  Silvia Mastellone ,  Stefan Almer

IPC: H02M7/44 ,  H02M1/32 ,  H02M1/14

CPC classification number: H02M7/44 ,  H02J3/383 ,  H02J3/385 ,  H02M1/14 ,  H02M1/32 ,  H02M7/5387 ,  Y02E10/563 ,  Y02E10/58

Abstract: DC/AC converter comprising a new control device and method for managing inrush current transients during operation without requiring additional external devices or emergency operating modes forcing the DC/AC converter to shut down. The present invention is particularly, but not exclusively, aimed at grid connected DC/AC, converters, often subject to inrush current phenomena due to perturbations in the grid.