公开(公告)号：US11146165B2

公开(公告)日：2021-10-12

申请号：US16951912

申请日：2020-11-18

Applicant: Rockwell Automation Technologies, Inc.

Inventor： Lei Jin ,  Haihui Lu ,  Ahmed S. Mohamed Sayed Ahmed ,  Rob J Miklosovic

IPC: H02J3/00 ,  H02M1/12 ,  H02J3/01

Abstract: For grid-connected power converter control, a method estimates a d-axis grid voltage from a d-axis reference current modified with a d-axis current and a q-axis current modified with a filter inductive reactance. The method generates a q-axis current error from a direct current (DC) voltage input and a DC bus voltage. The method estimates an observer q-axis grid voltage from a q-axis voltage output. The q-axis grid voltage observer estimates the q-axis grid voltage in a direct/quadrature (dq) reference frame equivalent to an ABC to DQ reference frame transform. The method determines a d-axis voltage output as a function of a d-axis current error and a q-axis current modified with a filter inductive reactance. The method determines a q-axis voltage output as a sum of the q-axis current controller output and the observer q-axis grid voltage.

公开(公告)号：US20210075311A1

公开(公告)日：2021-03-11

申请号：US16951912

申请日：2020-11-18

Applicant: Rockwell Automation Technologies, Inc.

Inventor： Lei Jin ,  Haihui Lu ,  Ahmed S. Mohamed Sayed Ahmed ,  Rob J Miklosovic

IPC: H02M1/12 ,  H02J3/01

Abstract: For grid-connected power converter control, a method estimates a d-axis grid voltage from a d-axis reference current modified with a d-axis current and a q-axis current modified with a filter inductive reactance. The method generates a q-axis current error from a direct current (DC) voltage input and a DC bus voltage. The method estimates an observer q-axis grid voltage from a q-axis voltage output. The q-axis grid voltage observer estimates the q-axis grid voltage in a direct/quadrature (dq) reference frame equivalent to an ABC to DQ reference frame transform. The method determines a d-axis voltage output as a function of a d-axis current error and a q-axis current modified with a filter inductive reactance. The method determines a q-axis voltage output as a sum of the q-axis current controller output and the observer q-axis grid voltage.