公开(公告)号：US10992129B2

公开(公告)日：2021-04-27

申请号：US15754783

申请日：2016-08-22

Applicant: GE Energy Power Conversion Technology Ltd

Inventor： Lihua Hu ,  Teng Long ,  Martin Samuel Butcher ,  Allan David Crane

IPC: H02H7/26 ,  H02H3/16 ,  G01R31/50 ,  G01R31/08 ,  H02H1/00 ,  G01R19/25 ,  G01R23/16

Abstract: A power distribution system includes power converter systems electrically connected to a distribution bus which defines a point of common coupling. Each power converter system includes a power converter with semiconductor switching devices controlled using a pulse width modulation strategy with a switching frequency. A controller for each power converter system applies a spectrum analysis process to the respective power converter system that uses measured or derived zero sequence currents associated with the respective power converter system to determine the location of a ground fault within the power distribution system. Each controller applies a switching frequency process where the switching frequency of the power converter of at least one of the power converter systems is different from the switching frequency of the power converter of at least another one of the power converter systems during at least part of the time that the spectrum analysis process is applied.

公开(公告)号：US09954393B2

公开(公告)日：2018-04-24

申请号：US15136580

申请日：2016-04-22

Applicant: GE Energy Power Conversion Technology Ltd

Inventor： Teng Long ,  Stephen Wood ,  Ushindibaba Mupambireyi

IPC: H02J9/00 ,  H01F1/00 ,  H01F3/00 ,  H02J1/16 ,  H02J3/30 ,  H02J9/06 ,  H02J3/38 ,  B63J3/02 ,  H02M7/68

CPC classification number: H02J9/066 ,  B63J3/02 ,  H02J3/38 ,  H02J9/00 ,  H02M7/68

Abstract: A power distribution system is described. The system includes a main ac busbar and an emergency ac busbar. A hybrid drive system includes an induction electrical machine and a prime mover, the rotor of the electrical machine and the driving end of the prime mover being mechanically coupled to a load by means of a mechanical linkage such as a gearbox. The system includes a first active rectifier/inverter having ac input terminals electrically connected to the main ac busbar, and dc output terminals. The system includes a second active rectifier/inverter having dc input terminals electrically connected to the dc output of the first active rectifier/inverter by a dc link, and ac output terminals electrically connected to the induction electrical machine. A blackout restart system includes a rectifier having ac input terminals selectively electrically connectable to the emergency ac busbar and dc output terminals selectively electrically connectable to the dc link.

公开(公告)号：US10263520B2

公开(公告)日：2019-04-16

申请号：US15610120

申请日：2017-05-31

Applicant: GE ENERGY POWER CONVERSION TECHNOLOGY LTD

Inventor： Teng Long ,  Allan David Crane ,  Martin Charles Southall ,  Mounir Louati

IPC: H02M3/158 ,  H02M1/14

Abstract: A DC/DC power converter connected to a DC power source having first and second DC terminals. The DC/DC power converter operates in voltage step-up and step-down modes. The converter includes first and second DC buses connected to the first and second DC terminals and third and fourth DC buses defining a DC link. Energy storage devices are connected between the third and fourth buses. A first converter leg includes a first branch with switches and a second branch. Each switch includes a controllable semiconductor switch and an anti-parallel connected freewheeling diode. A controller switches the controllable semiconductor switches between a conducting and non-conducting state, in the step-up and step-down modes, switching to supply power from the DC power source to the DC link in the step-up mode and to supply power from the DC link to the DC power source in the step-down mode.