公开(公告)号：US20170279365A1

公开(公告)日：2017-09-28

申请号：US15618475

申请日：2017-06-09

Applicant: ABB Schweiz AG

Inventor： Thomas Besselmann ,  Stefan Almer ,  Jan Wiik ,  Sture Van de Moortel

IPC: H02M5/451 ,  G05B15/02 ,  H02M1/00

CPC classification number: H02M5/451 ,  H02H7/1216 ,  H02M5/4505 ,  H02M2001/0003 ,  H02M2001/325

Abstract: A load commutated converter interconnects an AC power grid with an AC load and comprises a grid-side converter, a DC link and a load-side converter. A method for controlling the load commutated converter comprises: determining a gridside firing angle for the grid-side converter; determining a load-side firing angle for the load-side converter; determining a grid voltage of the AC power grid; modifying the grid-side firing angle and/or the load-side firing angle based on the grid voltage, such that when an undervoltage condition in the AC power grid occurs, the operation of the load commutated converter is adapted to a change in the grid voltage; and applying the grid-side firing angle to the grid-side converter and the load-side firing angle to the load-side converter.

公开(公告)号：US10075088B2

公开(公告)日：2018-09-11

申请号：US15618475

申请日：2017-06-09

Applicant: ABB Schweiz AG

Inventor： Thomas Besselmann ,  Stefan Almer ,  Jan Wiik ,  Sture Van de Moortel

IPC: H02M5/451 ,  H02M1/00

CPC classification number: H02M5/451 ,  H02H7/1216 ,  H02M5/4505 ,  H02M2001/0003 ,  H02M2001/325

Abstract: A load commutated converter interconnects an AC power grid with an AC load and comprises a grid-side converter, a DC link and a load-side converter. A method for controlling the load commutated converter comprises: determining a gridside firing angle for the grid-side converter; determining a load-side firing angle for the load-side converter; determining a grid voltage of the AC power grid; modifying the grid-side firing angle and/or the load-side firing angle based on the grid voltage, such that when an undervoltage condition in the AC power grid occurs, the operation of the load commutated converter is adapted to a change in the grid voltage; and applying the grid-side firing angle to the grid-side converter and the load-side firing angle to the load-side converter.