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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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Patent Agency Ranking
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：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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