公开(公告)号：US20170346398A1

公开(公告)日：2017-11-30

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

CPC classification number: H02M3/158 ,  H02M1/14 ,  H02M3/1582

Abstract: A DC/DC power converter connected to a DC power source/load 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/load to the DC link in the step-up mode and to supply power from the DC link to the DC power source/load in the step-down mode.

公开(公告)号：US20180241200A1

公开(公告)日：2018-08-23

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 ,  H02H1/00 ,  G01R31/02 ,  G01R31/08

CPC classification number: H02H7/26 ,  G01R19/2513 ,  G01R23/16 ,  G01R31/025 ,  G01R31/086 ,  H02H1/0007 ,  H02H3/162

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：US20150295498A1

公开(公告)日：2015-10-15

申请号：US14683528

申请日：2015-04-10

Applicant: GE Energy Power Conversion Technology Ltd

Inventor： Allan David CRANE ,  Warren Mark BLEWITT

IPC: H02M3/335

CPC classification number: H02M3/33507 ,  G05F1/14 ,  H02M2001/0093

Abstract: A power converter arrangement is described. The power converter includes a dc link and a power converter. The dc link is operably connected between a generator, or other power source, that provides an output voltage in use and a dc network. The power converter includes an inverter connected across the dc link in parallel with the generator, an isolation transformer having a primary tap changer and a secondary tap changer, and a rectifier. The rectifier has ac terminals connected to the secondary tap changer, a first dc terminal connected to the dc link, and a second dc terminal connected to the dc network. The dc terminal voltage of the rectifier is therefore summated with the output voltage of the generator to provide a converter output voltage.

Abstract translation: 描述了功率转换器装置。 电源转换器包括一个直流链路和一个电源转换器。 直流链路可操作地连接在提供使用中的输出电压和直流网络的发电机或其他电源之间。 功率转换器包括与发电机并联的直流连接的逆变器，具有主抽头变换器和次级抽头变换器的隔离变压器以及整流器。 整流器具有连接到次级分接开关的交流端子，连接到直流链路的第一直流端子和连接到直流网络的第二直流端子。 因此，整流器的直流端子电压与发电机的输出电压相加以提供转换器输出电压。