公开(公告)号：US11146073B2

公开(公告)日：2021-10-12

申请号：US16672235

申请日：2019-11-01

Applicant: Caterpillar Inc.

Inventor： Mike Snopko ,  Perry Converse ,  David Miller ,  Alexander Smith

IPC: H02J1/10 ,  H02J3/38 ,  H02J3/40 ,  H02J3/46 ,  B63B79/40 ,  B63H21/14 ,  F02D25/02 ,  F02D41/26 ,  B63H1/02

Abstract: A system and method for synchronizing a frequency of plurality of variable frequency generators with a variable frequency load over a variable frequency bus independent of a frequency conversion stage. A synchronization controller is configured to determine an optimal bus frequency of the variable frequency bus based on at least one power demand requirement of the variable frequency load operatively connected to the variable frequency bus. With the optimal frequency, an available power range supplied by the plurality of variable frequency gensets at the optimal bus frequency can be determined. The synchronization controller then asymmetrically loads the variable frequency load to the plurality variable frequency gensets at the optimal bus frequency based on the operating range of each variable frequency genset and recursively updates the optimal bus frequency based on operational statistics of the asymmetrically loaded variable frequency gensets.

公开(公告)号：US20210135459A1

公开(公告)日：2021-05-06

申请号：US16672230

申请日：2019-11-01

Applicant: Caterpillar Inc.

Inventor： Perry Converse ,  Per Ole Sorensen ,  Mike Snopko ,  David Miller

IPC: H02J3/46 ,  H02J13/00

Abstract: A system and method for variable frequency voltage regulation is presented. The system includes a variable frequency bus and a variable frequency load directly connected to the variable frequency bus. A plurality of variable frequency gensets are directly connected to the variable frequency bus. Each variable frequency genset includes a genset controller configured to select set points based on a selected frequency response curve of the variable frequency bus. A variable frequency voltage regulator is configured to regulate an electrical output of the variable frequency generator based on the selected set points. The system includes a voltage regulation controller configured to determine a desired bus frequency based on the variable frequency load, and determine an optimal frequency response curve based on the desired bus frequency and a frequency response model of each VFG. The selected frequency response curve is updated based on the determined optimal frequency response curve.

公开(公告)号：US20210135458A1

公开(公告)日：2021-05-06

申请号：US16672235

申请日：2019-11-01

Applicant: Caterpillar Inc.

Inventor： Mike Snopko ,  Perry Converse ,  David Miller ,  Alexander Smith

IPC: H02J3/40 ,  H02J3/46 ,  B63B79/40 ,  B63H1/02 ,  B63H21/14 ,  F02D25/02 ,  F02D41/26

Abstract: A system and method for synchronizing a frequency of plurality of variable frequency generators with a variable frequency load over a variable frequency bus independent of a frequency conversion stage. A synchronization controller is configured to determine an optimal bus frequency of the variable frequency bus based on at least one power demand requirement of the variable frequency load operatively connected to the variable frequency bus. With the optimal frequency, an available power range supplied by the plurality of variable frequency gensets at the optimal bus frequency can be determined. The synchronization controller then asymmetrically loads the variable frequency load to the plurality variable frequency gensets at the optimal bus frequency based on the operating range of each variable frequency genset and recursively updates the optimal bus frequency based on operational statistics of the asymmetrically loaded variable frequency gensets.

公开(公告)号：US11177664B2

公开(公告)日：2021-11-16

申请号：US16672230

申请日：2019-11-01

Applicant: Caterpillar Inc.

Inventor： Perry Converse ,  Per Ole Sorensen ,  Mike Snopko ,  David Miller

IPC: H02J3/46 ,  H02J13/00

Abstract: A system and method for variable frequency voltage regulation is presented. The system includes a variable frequency bus and a variable frequency load directly connected to the variable frequency bus. A plurality of variable frequency gensets are directly connected to the variable frequency bus. Each variable frequency genset includes a genset controller configured to select set points based on a selected frequency response curve of the variable frequency bus. A variable frequency voltage regulator is configured to regulate an electrical output of the variable frequency generator based on the selected set points. The system includes a voltage regulation controller configured to determine a desired bus frequency based on the variable frequency load, and determine an optimal frequency response curve based on the desired bus frequency and a frequency response model of each VFG. The selected frequency response curve is updated based on the determined optimal frequency response curve.