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公开(公告)号：US09537416B2
公开(公告)日：2017-01-03
申请号：US14555956
申请日：2014-11-28
Applicant: General Electric Company
Inventor： Zhihui Yuan , Qingyun Chen , Stefan Schroeder , Jie Shen
CPC classification number: H02M5/44 , H02M1/36 , H02M5/45 , H02M7/483 , H02M2007/4835
Abstract: An electrical circuit for a power converter includes a first switching device proximate an AC source. The circuit also includes a voltage measurement device proximate a DC link and extends between the AC source and the DC link. The circuit further includes a DC voltage source and a first capacitive device. The first capacitive device is positioned between the first switching device and the voltage measurement device. The circuit further includes a second switching device positioned between the first capacitive device and the voltage measurement device. The circuit also includes a controller operatively coupled to the DC voltage source, the voltage measurement device, and the switching devices. The controller is configured to open the second switching device when a measured voltage signal generated by the voltage measurement device is substantially representative of a reference voltage value.
Abstract translation: 用于功率转换器的电路包括靠近AC电源的第一开关装置。 电路还包括靠近DC链路的电压测量装置，并且在AC源和DC链路之间延伸。 电路还包括直流电压源和第一电容性装置。 第一电容器件位于第一开关器件和电压测量器件之间。 该电路还包括位于第一电容性装置和电压测量装置之间的第二开关装置。 电路还包括可操作地耦合到DC电压源，电压测量装置和开关装置的控制器。 控制器被配置为当由电压测量装置产生的测量电压信号基本上代表参考电压值时，打开第二开关装置。
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公开(公告)号：US11456660B2
公开(公告)日：2022-09-27
申请号：US15777919
申请日：2016-12-19
Applicant: General Electric Company
Inventor： Zhihui Yuan , Stefan Schroeder , Jie Shen , Mohamed Ahmed Abdelmohsen Hashem , Yunzheng Chen
Abstract: A power conversion system includes one or more power conversion devices coupled to a grid connection. Each of the power conversion devices includes a power converter for converting a first multiphase current provided by the grid connection into a second current; a grid side filter coupled between the grid connection and an input of the power converter; a load side filter coupled to an output of the power converter; neutral points of the grid side filter and the load side filter connected together to form a first node; wherein the first node is not directly grounded.
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公开(公告)号：US10916947B2
公开(公告)日：2021-02-09
申请号：US15129526
申请日：2015-03-27
Applicant: General Electric Company
Inventor： Jie Shen , Zhihui Yuan , Christof Martin Sihler , Stefan Schroeder , Mark Aaron Chan , Fei Xu
Abstract: A modular substation (10) for subsea applications includes a plurality of modular DC/AC converters (32) configured for converting DC electrical power transmitted along a DC transmission link (24) into AC electrical power for supplying to a plurality of subsea loads (56). The plurality of modular DC/AC converters (32) is configured to couple in series to the DC transmission link (24) and couple in parallel to an AC distribution network (52). At least a first modular DC/AC converter (32) is configured to be selectively electrically and mechanically disconnected from the DC transmission link (24) and the AC distribution network (52) to facilitate maintenance of the first modular DC/AC converters (32) while the AC distribution network (52) continues to supply AC electrical power to at least one of the plurality of subsea loads (56). The modular substation (10) also comprises protection and bypass circuits (26) intended to isolate faulty DC/AC converters (32) and to facilitate safe maintenance and repair.
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公开(公告)号：US10585134B2
公开(公告)日：2020-03-10
申请号：US15766132
申请日：2015-10-05
Applicant: GENERAL ELECTRIC COMPANY
Inventor： Max-Josef Kell , Stefan Schroeder , Jie Shen , Zhihui Yuan , Yunzheng Chen , Mohamed Hashem
IPC: G01R31/08 , H02H3/16 , H02H7/22 , H02H3/10 , H02H3/36 , H02H7/12 , H02J3/36 , H02H1/00 , G01R31/02 , H02H7/122 , H02H7/125
Abstract: A drive system includes a current sensor configured to generate a first current signal representative of a current flowing in one or more electrical devices electrically coupled together through a power supply bus, a power output bus, and a common ground. The drive system also includes a voltage sensor configured to generate a first voltage signal representative of a voltage with respect to the common ground in the one or more electrical devices. The drive system further includes a ground fault detection controller configured to determine a ground fault in the one or more electrical devices based on a change in at least one of the first current signal and the first voltage signal.
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15.发明授权公开(公告)号：US10476373B2
公开(公告)日：2019-11-12
申请号：US15772953
申请日：2016-10-25
Applicant: General Electric Company
Inventor： Zhihui Yuan , Richard S. Zhang , Stefan Schroeder , Yingqi Zhang , Jie Shen , Fan Zhang
Abstract: A method for controlling a plurality of series connected switch modules each including at least two parallel connected electronic switches, the method includes the step of, in response to failure of any electronic switch of one or more switch modules, turning on any non-faulty electronic switch of one or more faulty switch modules when the electronic switches of other non-faculty switch modules are controlled to be turned on.
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Patent Agency Ranking
公开(公告)号：US10389230B2
公开(公告)日：2019-08-20
申请号：US15903710
申请日：2018-02-23
Applicant: General Electric Company
Inventor： Saijun Mao , Stefan Schroeder , Jingkui Shi , He Xu , Marius Michael Mechlinski , Bo Qu , Zhihui Yuan , Yingqi Zhang , Jie Shen
IPC: H02M1/34 , H03K17/0814 , H03K17/10 , H02M3/158
Abstract: The present disclosure relates to a snubber circuit which comprises a static snubber unit, connected in parallel with the switch, for balancing a static voltage sharing across a switch when the switch is in a state of turn-on or turn-off; and a dynamic snubber unit for balance a dynamic voltage sharing across the switch when the switch is in a process of turn-on or turn-off, comprising a dynamic voltage sharing capacitor connected in parallel with the switch and having a relationship between a capacitance and a voltage of the dynamic voltage sharing capacitor; and a controller for controlling the capacitance of the dynamic voltage sharing capacitor to be in a predetermined working area of capacitance rising while the voltage across the switch is increasing. The present disclosure also relates to a power semiconductor device.
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公开(公告)号：US20180287487A1
公开(公告)日：2018-10-04
申请号：US15903710
申请日：2018-02-23
Applicant: General Electric Company
Inventor： Saijun Mao , Stefan Schroeder , Jingkui Shi , He Xu , Marius Michael Mechlinski , Bo Qu , Zhihui Yuan , Yingqi Zhang , Jie Shen
CPC classification number: H02M1/34 , H02M3/158 , H02M2001/344 , H02M2001/348 , H03K17/08142 , H03K17/102
Abstract: The present disclosure relates to a snubber circuit which comprises a static snubber unit, connected in parallel with the switch, for balancing a static voltage sharing across a switch when the switch is in a state of turn-on or turn-off; and a dynamic snubber unit for balance a dynamic voltage sharing across the switch when the switch is in a process of turn-on or turn-off, comprising a dynamic voltage sharing capacitor connected in parallel with the switch and having a relationship between a capacitance and a voltage of the dynamic voltage sharing capacitor; and a controller for controlling the capacitance of the dynamic voltage sharing capacitor to be in a predetermined working area of capacitance rising while the voltage across the switch is increasing. The present disclosure also relates to a power semiconductor device.
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公开(公告)号：US10073512B2
公开(公告)日：2018-09-11
申请号：US14547178
申请日：2014-11-19
Applicant: General Electric Company
Inventor： Simon Herbert Schramm , Said Farouk Said El-Barbari , Stefan Schroeder , Zhihui Yuan
CPC classification number: G06F1/3287 , G06F1/3293 , H02M3/33584
Abstract: A power converter includes primary and secondary bridges, a transformer, and a controller configured to generate a switching mode map that correlates each of a plurality of switching modes to a respective set of value ranges of system parameters of the power converter. The sets of system parameter value ranges are contiguous and non-overlapping across the switching mode map, each of the plurality of switching modes includes gate trigger voltage timings for commuting at least one of the primary and secondary bridges. The controller is configured to obtain a plurality of measured system parameter values, select from the switching mode map one of the plurality of switching modes that correlates to the set of system parameter values containing the plurality of measured system parameter values, and adjust gate trigger voltage timings of at least one of the primary and secondary bridges, according to the selected switching mode.
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公开(公告)号：US09970417B2
公开(公告)日：2018-05-15
申请号：US15098929
申请日：2016-04-14
Applicant: General Electric Company
Inventor： Zhihui Yuan , Robert Roesner , Stefan Schroeder , Ara Panosyan , Krishna Kumar Anaparthi
CPC classification number: F03D9/257 , F03D9/255 , H02J3/386 , H02P9/04 , H02P2101/15
Abstract: This disclosure relates to systems and methods for controlling a wind converter for a weak electrical grid. In one embodiment of the disclosure, a system for controlling the wind converter includes a wind converter connected to an electrical grid at a point of connection (POC) and operable to transfer a power to the electrical grid. The system includes a first control loop operable to calculate, based on electrical grid parameters and wind converter characteristics, a voltage reference to be generated by the wind converter. The system includes a second control loop to convert, based on the electrical grid parameters, the voltage reference into a current reference. The second loop converts the angle information of the voltage reference into a voltage at the POC. The system includes a third control to regulate, based at least on the current reference, the power transferred by the wind converter to the electrical grid.
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公开(公告)号：US20160156276A1
公开(公告)日：2016-06-02
申请号：US14555956
申请日：2014-11-28
Applicant: General Electric Company
Inventor： Zhihui Yuan , Qingyun Chen , Stefan Schroeder , Jie Shen
IPC: H02M5/44
CPC classification number: H02M5/44 , H02M1/36 , H02M5/45 , H02M7/483 , H02M2007/4835
Abstract: An electrical circuit for a power converter includes a first switching device proximate an AC source. The circuit also includes a voltage measurement device proximate a DC link and extends between the AC source and the DC link. The circuit further includes a DC voltage source and a first capacitive device. The first capacitive device is positioned between the first switching device and the voltage measurement device. The circuit further includes a second switching device positioned between the first capacitive device and the voltage measurement device. The circuit also includes a controller operatively coupled to the DC voltage source, the voltage measurement device, and the switching devices. The controller is configured to open the second switching device when a measured voltage signal generated by the voltage measurement device is substantially representative of a reference voltage value.
Abstract translation: 用于功率转换器的电路包括靠近AC电源的第一开关装置。 电路还包括靠近DC链路的电压测量装置，并且在AC源和DC链路之间延伸。 电路还包括直流电压源和第一电容性装置。 第一电容器件位于第一开关器件和电压测量器件之间。 该电路还包括位于第一电容性装置和电压测量装置之间的第二开关装置。 电路还包括可操作地耦合到DC电压源，电压测量装置和开关装置的控制器。 当由电压测量装置产生的测量电压信号基本上代表参考电压值时，控制器被配置为打开第二开关装置。
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