-
公开(公告)号：US11555380B2
公开(公告)日：2023-01-17
申请号：US16608030
申请日：2018-04-24
发明人： Saijun Mao , Yunzheng Chen , Yi Liao , Xuele Qi , Ming Xue , Stewart Blake Brazil
摘要： A downhole power generation includes a power generation module for providing power to a load. A turbine is driven by flow of a downhole fluid to rotate. A generator is coupled with the turbine for converting rotational energy from the turbine to electrical energy, and an AC-DC rectifier is coupled with the generator for converting an alternating voltage from the generator to a direct voltage. A power conversion circuit couples 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.
-
公开(公告)号：US11456660B2
公开(公告)日：2022-09-27
申请号：US15777919
申请日：2016-12-19
摘要： 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.
-
公开(公告)号：US11454094B2
公开(公告)日：2022-09-27
申请号：US16608009
申请日：2018-04-24
发明人： Yunzheng Chen , Yi Liao , Saijun Mao , Ming Xue , Stewart Blake Brazil , Xuele Qi
IPC分类号： F03B13/02 , F03B15/00 , H02P9/04 , H02P101/10 , E21B41/00
摘要： 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.
-
公开(公告)号：US10585134B2
公开(公告)日：2020-03-10
申请号：US15766132
申请日：2015-10-05
发明人： Max-Josef Kell , Stefan Schroeder , Jie Shen , Zhihui Yuan , Yunzheng Chen , Mohamed Hashem
IPC分类号： G01R31/08 , H02H3/16 , H02H7/22 , H02H3/10 , H02H3/36 , H02H7/12 , H02J3/36 , H02H1/00 , G01R31/02 , H02H7/122 , H02H7/125
摘要： 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.
-
-
-
搜索结果
4 条记录 (耗时 0.02 秒)
