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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
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.
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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
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.
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公开(公告)号：US09252645B2
公开(公告)日：2016-02-02
申请号：US14011916
申请日：2013-08-28
Applicant: GE Energy Power Conversion Technology Ltd
Inventor： Allan David Crane
CPC classification number: H02K11/33 , H02K3/28 , H02K2213/12 , H02P6/14 , H02P25/22 , Y02E10/725
Abstract: A dc electrical machine with a large number of phases. The machine includes a rotor and a stator assembly. The rotor has Np rotating field poles. The stator has Ns winding slots, where Ns/Np is a non-integer ratio. A stator winding includes a plurality of coils received in the winding slots and defines a plurality of stator phases. A power electronic switching assembly includes first and second dc load terminals that can be connected to external equipment and a plurality of switching modules. Each switching module includes power electronic devices and is connected to a respective stator coil. A first proportion of the switching modules are connected together in series between the first and second dc load terminals and a second proportion of the switching modules are connected together in series between the first and second dc load terminals to define two parallel dc circuits.
Abstract translation: 具有大量相位的直流电机。 该机器包括转子和定子组件。 转子具有Np旋转场磁极。 定子具有Ns绕组槽，其中Ns / Np是非整数比。 定子绕组包括容纳在绕组槽中的多个线圈并且限定多个定子相。 电力电子开关组件包括可连接到外部设备和多个开关模块的第一和第二直流负载端子。 每个开关模块包括电力电子装置并且连接到相应的定子线圈。 开关模块的第一比例串联在第一和第二直流负载端子之间，第二比例的开关模块串联连接在第一和第二直流负载端子之间，以限定两个并联直流电路。
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公开(公告)号：US09800161B2
公开(公告)日：2017-10-24
申请号：US14683528
申请日：2015-04-10
Applicant: GE Energy Power Conversion Technology Ltd
Inventor： Allan David Crane , Warren Mark Blewitt
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.
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