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1. 发明申请

US20220102979A1 RELATING TO POWER TRANSMISSION NETWORKS 有权
公开(公告)号：US20220102979A1
公开(公告)日：2022-03-31
申请号：US17485246
申请日：2021-09-24
申请人： General Electric Technology GmbH
发明人： Guillaume DE PREVILLE , Julian FREYTES , Jiaqi LI , Marc THOUVENIN , Omar JASIM
IPC分类号： H02J3/36
摘要： In the field of high voltage direct current (HVDC) power transmission networks, there is a need for improvements to allow a single power converter to control individual AC network voltages carried by multiple AC transmission conduits to multiple AC network elements, such as respective wind parks.
A power transmission network (10; 100) comprises a power converter (12) which has first and second DC converter terminals (14, 16) that are for connection, in use, to a DC network. The power converter (12) also includes an AC converter terminal (22) which is electrically connected to a plurality of AC transmission conduits (241, 242, 24n), each of which is for connection, in use, to a respective AC network element (261, 262, 26n) that is configured to operate at a respective individual AC network voltage. The power converter (12) further includes a primary converter controller (34) which is programmed, in use, to control the transfer of power through the power converter (12) and thereby between the DC network and the plurality of AC network elements (261, 262, 26n). The primary converter controller (34) is further programmed, in use, to control each individual AC network voltage by establishing a virtual voltage which is representative of the plurality of AC network voltages and altering a single AC converter voltage produced by the power converter (12) at the AC converter terminal (22) to adjust the virtual voltage and thereby adjust each individual AC network voltage.

2. 发明申请

US20230140103A1 IMPROVEMENTS IN OR RELATING TO BIPOLE POWER TRANSMISSION SCHEMES 有权
公开(公告)号：US20230140103A1
公开(公告)日：2023-05-04
申请号：US17910687
申请日：2021-03-16
申请人： General Electric Technology GmbH
发明人： Mita BABU NARAYANAN , Omar JASIM
IPC分类号： H02J3/38 , H02J3/00
摘要： A bipole power transmission scheme with two independent converts, two power feed and one return conduit. During operation of the bipole power transmission scheme under abnormal conditions, when a return conduit is faulty and unable to provide a return current path, each converter controller is programmed to monitor the first power feed in the first transmission conduit and the second power feed in the second transmission conduit and, if the first power feed in the first transmission conduit and the second power feed in the second transmission conduit differ from one another, at least one converter controller modifies the power infeed from its corresponding power source to reduce the difference between the first power feed and the second power feed.

3. 发明申请

US20230028868A1 HVDC POWER TRANSMISSION 有权
公开(公告)号：US20230028868A1
公开(公告)日：2023-01-26
申请号：US17788244
申请日：2020-12-23
申请人： General Electric Technology GmbH
发明人： Omar JASIM , Mohomed Abdul QUIUM
IPC分类号： H02J3/36 , H02J3/48
摘要： The present disclosure includes methods and apparatus for HVDC power distribution. A control apparatus is described for controlling a frequency set-point for a first AC network electrically connected to a first HVDC station to regulate active power. The controller has a frequency controller operable in a first mode of operation to determine a frequency set-point (Fref) for the first AC network based on a measured DC voltage at the first HVDC station. A disturbance detector is configured to monitor the measured value of DC voltage at the first HVDC station (VDC1) for a predetermined characteristic indicative that a variation in measured DC voltage does correspond to a known modulation applied to the DC voltage by a second HVDC station. The frequency controller is configured to determine the frequency set-point (Fref) for the first AC network based on a measured value of DC voltage (VDC1) if said predetermined characteristic is detected, and to control the frequency set-point to a predetermined default frequency if said predetermined characteristic is not detected.

4. 发明申请

US20230062409A1 SWITCHING VALVE 有权
公开(公告)号：US20230062409A1
公开(公告)日：2023-03-02
申请号：US17890685
申请日：2022-08-18
申请人： General Electric Technology GmbH
发明人： Pablo BRIFF , Carl BARKER , Omar JASIM , Jose Augusto MONTEIRO
IPC分类号： H02J3/01 , H02M1/12 , H02M7/217
摘要： There is provided a switching valve for a voltage source converter, the switching valve including a number of modules, each module including at least one switching element and at least one energy storage device, the or each switching element and the or each energy storage device in each module arranged to be combinable to selectively provide a voltage source, the switching valve including a controller programmed to selectively control the switching of the switching elements to select one or more of the modules to contribute a or a respective voltage to a switching valve voltage.

5. 发明申请

US20210249969A1 VOLTAGE SOURCE CONVERTER 有权
公开(公告)号：US20210249969A1
公开(公告)日：2021-08-12
申请号：US17270814
申请日：2019-08-19
申请人： General Electric Technology GmbH
发明人： Pablo Ariel BRIFF , Huy Quoc Si DANG , Richard S. ZHANG , Guillaume DE PREVILLE , Stéphane Pierre BREHAULT , Omar JASIM
IPC分类号： H02M7/483 , H02M1/42
摘要： In the field of high voltage direct current (HVDC) transmission, a voltage source converter comprises first and second DC terminals that are for connection to a DC network. The voltage source converter also includes at least one converter limb. The or each converter limb extends between the first and second DC terminals and includes first and second limb portions that are separated by a respective AC terminal for connection to a corresponding phase of an AC network. Each first limb portion extends between the first DC terminal and a corresponding AC terminal, and each second limb portion extends between the second DC terminal and the corresponding AC terminal. Each limb portion includes a respective chain-link converter which is defined by a plurality of series-connected switching modules which are operable in combination to provide a stepped variable voltage source. In addition the voltage source converter also includes a control apparatus that is configured to coordinate operation of the chain-link converters to cause an exchange of power between the DC and AC networks. The control apparatus evaluates the combined performance of the switching modules within at least one chain-link converter and acts to modify the coordinated operation of the chain-link converters when the combined performance of the switching modules becomes degraded to a predetermined extent.

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