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公开(公告)号：US20210102444A1
公开(公告)日：2021-04-08
申请号：US16608009
申请日：2018-04-24
Applicant: GENERAL ELECTRIC COMPANY
Inventor： Yunzheng CHEN , Yi LIAO , Saijun MAO , Ming XUE , Stewart Blake BRAZIL , Xuele QI
Abstract: A downhole power generation system is disclosed, which includes a turbine generator system. The turbine generator system includes a turbine, a generator coupled with the turbine and having an AC-DC rectifier, and an optimized power control unit. The turbine is driven by flow of a downhole fluid to rotate. The generator converts rotational energy from the turbine to electrical energy and outputting a direct current voltage. The turbine generator system is coupled to a load via the optimized power control unit. The optimized power control unit controls to regulate an output voltage of the generator and provides a regulated output voltage to the load so that the turbine generator system has an optimized power output. An optimized power control method for a downhole power generation system is also disclosed.
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公开(公告)号：US20180306853A1
公开(公告)日：2018-10-25
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
CPC classification number: G01R31/086 , G01R31/025 , H02H1/0007 , H02H3/105 , H02H3/162 , H02H3/36 , H02H7/1216 , H02H7/122 , H02H7/125 , H02H7/22 , H02J3/36 , Y02E60/60
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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公开(公告)号：US20180342943A1
公开(公告)日：2018-11-29
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：US20200056458A1
公开(公告)日：2020-02-20
申请号：US16608030
申请日：2018-04-24
Applicant: General Electric Company
Inventor： Saijun MAO , Yunzheng CHEN , Yi LIAO , Xuele QI , Ming XUE , Stewart Blake BRAZIL
Abstract: A downhole power generation system is disclosed, which includes a power generation module for providing power to a load, comprising a turbine driven by flow of a downhole fluid to rotate, a generator coupled with the turbine for converting rotational energy from the turbine to electrical energy, and an AC-DC rectifier coupled with the generator for converting an alternating current voltage from the generator to a direct current voltage, and a power conversion circuit coupling the AC-DC rectifier with the load. The power conversion circuit is configured for providing a first power to the load when the load is in a working mode and providing a second power to the load when the load is in a non-working mode. The second power is less than the first power. A downhole power generation method is also disclosed.
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