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公开(公告)号：US20220316443A1
公开(公告)日：2022-10-06
申请号：US17620904
申请日：2020-06-10
Applicant: The University of Birmingham
Inventor： Xiao-Ping Zhang , Ying Xue , Xianxian Zhao
Abstract: A method for controlling a wind turbine system connected to a power grid. The method comprises generating a wind turbine control signal based on a power control reference for controlling a power output of a wind turbine; monitoring an electrical frequency of the power grid; in response to detecting a change in the frequency in the power grid, activating a fast frequency support method comprising the steps of; adjusting the power control reference to cause an overproduction of power by the wind turbine; the overproduction of power causing a transfer of inertial kinetic energy from the wind turbine to electrical power; wherein the power control reference is determined by applying an adaptive gain function to a measurement of a difference in grid frequency from a nominal level.
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公开(公告)号：US11165330B2
公开(公告)日：2021-11-02
申请号：US16629389
申请日：2018-07-05
Applicant: The University of Birmingham
Inventor： Xiao-Ping Zhang , Ying Xue
Abstract: The disclosure relates to a line commutated converter, LCC, for a high-voltage direct current, HVDC, power converter. The LCC comprises at least one bridge circuit for connection to at least one terminal of a DC system. Each bridge circuit comprises at least two arms, and each arm is associated with a phase of an AC system. Each arm comprises one or more upper thyristor valves and one or more lower thyristor valves connected in series, and a branch extending from between the upper and lower thyristor valves. Each arm further comprises a parallel capacitor module comprising at least one parallel capacitor being connected in parallel between at least one pair of branches comprising a first branch and a second branch wherein during commutation of a flow of current in the first branch to a flow of current in the second branch, the at least one parallel capacitor is configured to discharge current in to the second branch in the same direction as the flow of current in the second branch.
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公开(公告)号：US20200052611A1
公开(公告)日：2020-02-13
申请号：US16489682
申请日：2018-03-01
Applicant: The University of Birmingham
Inventor： Xiao-Ping Zhang , Ying Xue
Abstract: A line commutated converter (LCC) for a high voltage direct current power converter, the LCC comprising at least one LCC bridge circuit for connection to at least one terminal of a DC system, each bridge circuit comprising a plurality of arms, each associated with a respective phase of an AC system, each arm comprising: an upper thyristor valve or valves, and lower thyristor valve or valves connected in series; an associated branch extending from between the upper and lower thyristors; and at least one thyristor-based capacitor module for each phase, each module comprising a plurality of module thyristors, the or each capacitor module operable to insert a main capacitor into the respective arm of the bridge circuit by firing at least one or more of said module thyristors.
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公开(公告)号：US10305370B2
公开(公告)日：2019-05-28
申请号：US15571715
申请日：2016-04-11
Applicant: The University of Birmingham
Inventor： Xiao-Ping Zhang , Ying Xue
Abstract: A line commutated converter, LCC, for a high-voltage, direct current, HVDC, power converter comprises at least one bridge circuit for connection to at least one terminal of a DC system. Each bridge circuit comprises a plurality of arms, and each arm is associated with a respective phase of an AC system. Each arm comprises an upper and lower thyristor connected in series, an associated branch extending from between the upper and lower thyristors, and at least one capacitor module for each phase. The, or each capacitor module is operable to insert a capacitor into the respective arm of the bridge circuit.
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Patent Agency Ranking
公开(公告)号：US10855200B2
公开(公告)日：2020-12-01
申请号：US16489682
申请日：2018-03-01
Applicant: The University of Birmingham
Inventor： Xiao-Ping Zhang , Ying Xue
Abstract: A line commutated converter (LCC) for a high voltage direct current power converter, the LCC comprising at least one LCC bridge circuit for connection to at least one terminal of a DC system, each bridge circuit comprising a plurality of arms, each associated with a respective phase of an AC system, each arm comprising: an upper thyristor valve or valves, and lower thyristor valve or valves connected in series; an associated branch extending from between the upper and lower thyristors; and at least one thyristor-based capacitor module for each phase, each module comprising a plurality of module thyristors, the or each capacitor module operable to insert a main capacitor into the respective arm of the bridge circuit by firing at least one or more of said module thyristors.
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公开(公告)号：US20200177071A1
公开(公告)日：2020-06-04
申请号：US16629389
申请日：2018-07-05
Applicant: The University of Birmingham
Inventor： Xiao-Ping Zhang , Ying Xue
Abstract: The disclosure relates to a line commutated converter, LCC, for a high-voltage direct current, HVDC, power converter. The LCC comprises at least one bridge circuit for connection to at least one terminal of a DC system. Each bridge circuit comprises at least two arms, and each arm is associated with a phase of an AC system. Each arm comprises one or more upper thyristor valves and one or more lower thyristor valves connected in series, and a branch extending from between the upper and lower thyristor valves. Each arm further comprises a parallel capacitor module comprising at least one parallel capacitor being connected in parallel between at least one pair of branches comprising a first branch and a second branch wherein during commutation of a flow of current in the first branch to a flow of current in the second branch, the at least one parallel capacitor is configured to discharge current in to the second branch in the same direction as the flow of current in the second branch.
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公开(公告)号：US20180159421A1
公开(公告)日：2018-06-07
申请号：US15571715
申请日：2016-04-11
Applicant: The University of Birmingham
Inventor： Xiao-Ping Zhang , Ying Xue
CPC classification number: H02M1/32 , H02M1/4208 , H02M7/5155 , H02M7/519 , H02M7/521 , H02M7/525 , H02M7/7575 , Y02E60/60
Abstract: A line commutated converter, LCC, for a high-voltage, direct current, HVDC, power converter comprises at least one bridge circuit for connection to at least one terminal of a DC system. Each bridge circuit comprises a plurality of arms, and each arm is associated with a respective phase of an AC system. Each arm comprises an upper and lower thyristor connected in series, an associated branch extending from between the upper and lower thyristors, and at least one capacitor module for each phase. The, or each capacitor module is operable to insert a capacitor into the respective arm of the bridge circuit.
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公开(公告)号：US09780556B2
公开(公告)日：2017-10-03
申请号：US14361868
申请日：2012-11-29
Applicant: The University of Birmingham
Inventor： Xiao-Ping Zhang , Zhou Li
CPC classification number: H02H7/125 , H02M1/32 , H02M7/483 , H02M2007/4835
Abstract: A Voltage Sourced Converter, VSC, for a High Voltage Direct Current, HVDC, power converter, the VSC comprises a bridge circuit for each of one or more phases of an AG network. The bridge circuit has two arms, each arm connecting the supply to a pole of a DC terminal, wherein each arm of the bridge circuit has one or more semiconductor modules capable of being switched between an on-condition, in which a capacitor of the module is in-line in the arm of the bridge circuit, and an off-condition, in which the capacitor is out of line. A DC current fault detection arrangement detects a fault arising at one or the other of the poles of the DC terminal within the DC converter or the DC grid. A controller responsive to the detection of the DC current fault switches one or more of the semiconductor modules in one of the arms of the bridge to the on and one or more of the semiconductor modules of the other arm of the bridge circuit to the off-condition.
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公开(公告)号：US20140328093A1
公开(公告)日：2014-11-06
申请号：US14361868
申请日：2012-11-29
Applicant: The University of Birmingham
Inventor： Xiao-Ping Zhang , Zhou Li
IPC: H02H7/125
CPC classification number: H02H7/125 , H02M1/32 , H02M7/483 , H02M2007/4835
Abstract: A Voltage Sourced Converter, VSC, for a High Voitage Direct Current, HVDC, power converter, the VSC comprises a bridge circuit for each of one or more phases of an AG network. The bridge circuit has two arms, each arm connecting the supply to a pole of a DC terminal, wherein each arm of the bridge circuit has one or more semiconductor modules capable of being switched between an on-condition, in which a capacitor of the module is in-line in the arm of the bridge circuit, and an off-condition, in which the capacitor is out of line. A DC current fault detection arrangement detects a fault arising at one or the other of the poles of the DC terminal within the DC converter or the DC grid. A controller responsive to the detection of the DC current fault switches one or more of the semiconductor modules in one of the arms of the bridge to the on and one or more of the semiconductor modules of the other arm of the bridge circuit to the off-condition.
Abstract translation: 用于高电压直流电的VSC的电压转换器VSC功率转换器包括用于AG网络的一个或多个相中的每一个的桥接电路。 桥接电路具有两个臂，每个臂将电源连接到直流端子的极，其中桥接电路的每个臂具有一个或多个半导体模块，其能够在接通状态之间切换，其中模块的电容器 在桥接电路的臂中是在线的，并且电容器脱离线路的关闭状态。 直流电流故障检测装置检测在直流转换器或直流电网内的直流端子的一个或多个极点处产生的故障。 响应于DC电流故障的检测的控制器将桥接器的一个臂中的一个或多个半导体模块切换到桥接电路的另一个臂的导通和一个或多个半导体模块， 条件。
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