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51.发明公开VOLTAGE-SOURCE MULTI-LEVEL CONVERTER, DIRECT-CURRENT POWER TRANSMISSION SYSTEM AND FAULT PROCESSING METHOD AND DEVICE 审中-公开多电平电压源逆变器，DC输电系统和故障处理方法和装置
公开(公告)号：EP3145071A1
公开(公告)日：2017-03-22
申请号：EP15788904.9
申请日：2015-02-05
发明人： SHEN, Guorong , TIAN, Jie , CAO, Dongming , LI, Haiying , DONG, Yunlong , WANG, Nannan , LIU, Haibin , LU, Yu
CPC分类号： H02J1/00 , H02J3/36 , H02M1/32 , H02M7/483 , H02M2007/4835
摘要： A voltage-source multi-level converter, including a phase unit (0). The phase unit (0) includes a first bridge arm (100) and a second bridge arm (200), where a first terminal of the first bridge arm (100) is a first DC terminal (P) of the phase unit (0), and a first terminal of the second bridge arm (200) is a second DC terminal (N) of the phase unit (0); a second terminal of the first bridge arm (100) and a second terminal of the second bridge arm (200) are shorted together, as an alternating-current terminal (A) of the phase unit (0); the first bridge arm (100) includes first modules (101) and one first reactor (102) connected in series, where a first terminal of the first reactor (102) is connected to the alternating-current terminal (A), a second terminal (X1) thereof is connected to a first terminal of the first modules (101), and a second terminal of the first modules (101) is connected to the first DC terminal (P); the second bridge arm (200) includes second modules (201) and one second reactor (202) connected in series, where a first terminal of the second reactor (202) is connected to the alternating-current terminal (A), a second terminal (X2) thereof is connected to a first terminal of the second modules (201), and a second terminal of the second modules (201) is connected to the second DC terminal (N); and a parallel fault shunt circuit (300) is connected between the second terminals (X1, X2) of the first reactor (102) and the second reactor (202). Also disclosed are a DC power transmission system and a fault processing method and device.
摘要翻译： 一种电压源多电平变换器，还包括一个相位单元（0）。 相位单元（0）包括：第一桥臂（100）和第二桥臂（200），其中所述第一桥臂（100）的第一端子是相位单元的第一直流端子（P）（0） 和第二桥臂（200）的第一端子是相位单元（0）的第二直流端子（N）; 第一桥臂（100）和所述第二桥臂（200）的第二端子的第二端子被短接在一起，如在相位单元（0）的交流端子（A）; 第一桥臂（100）包括串联连接的，其中所述第一反应器（102）的第一端子被连接到交流输出端子（A）第一模块（101）和一个第一反应器（102），第二端子 （X1）被连接到所述第一模块（101）的第一端子，并且所述第一模块（101）的第二端子连接到所述第一DC端子（P）; 第二桥臂（200）包括串联连接的，其中所述第二反应器（202）的第一端子被连接到交流输出端子（A）第二模块（201）和一个第二反应器（202），第二端子 （X2）被连接到所述第二模块（201）的第一端子，和第二模块（201）的第二端子连接到所述第二DC端子（N）; 和并联故障分流电路（300）被连接在第一反应器（102）和第二反应器（202）的第二端（X1，X2）之间。 所以圆盘游离缺失是DC输电系统和故障处理方法及装置。
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公开(公告)号：EP3136534A1
公开(公告)日：2017-03-01
申请号：EP15815487.2
申请日：2015-01-22
发明人： ZHAO, Wenqiang , LI, Lin , WANG, Yongping
IPC分类号： H02J3/36
摘要： The invention discloses a high voltage/ultrahigh voltage direct current transmission inverter side frequency control implementing method, comprising the following steps: transmitting a deviation between the inverter side power grid frequency and rated frequency to the inverter side frequency controller, wherein the frequency controller regulates and outputs a modulation quantity by adopting self-adaptive parameters according to different operation conditions; when the interstation communication is normal, the modulation quantity output of the inverter side frequency controller causes the rectifier side and the inverter side to form a new power/current order through the interstation communication, thus realizing the inverter side frequency control by changing the size of the transmission power; when the interstation communication is abnormal, converting the inverter side to current control from voltage control and converting the rectifier side to voltage control from current control; superposing the modulation quantity output of the inverter side frequency controller to the power/current order of the inverter side, changing the size of the transmission power to realizing the inverter side frequency control. The method realizes the fast efficient regulation function on the inverter side frequency, and effectively solves the problem of the inverter side frequency control for the interstation communication failure.
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公开(公告)号：EP3125394A1
公开(公告)日：2017-02-01
申请号：EP15796511.2
申请日：2015-01-12
发明人： TIAN, Jie , LI, Haiying , WANG, Xinbao , DONG, Yunlong , SHEN, Quanrong , PAN, Lei , LIU, Chao , CHANG, Baoli
IPC分类号： H02J3/00
CPC分类号： H02J3/14 , H02J3/16 , H02J3/1814 , H02J3/46 , Y02E40/18
摘要： An unified power flow controller for a double-circuit transmission line comprises at least one parallel-connection transformer (1), three current converters (4), at least two series-connection transformers (8), a parallel-connection side switching circuit (3), a series-connection side switching circuit (6) and a direct current common bus (5). At least one side of the series-connection transformers is connected with at least one group of by-pass switches (9, 10) in parallel. The alternating current sides of the three current converters are connected to each loop line in series after being connected with at least one series-connection transformer through the series-connection side switching circuit (6). The alternating current sides of the three current converters are connected to an alternating current system after connected with at least one parallel-connection transformer (1) through a parallel-connection side switching circuit starting circuit (2). The direct current sides of the three current converters are connected to the direct current common bus (5) through a transfer switch. With the unified power flow controller, various operating modes can be realized, and when one current converter is in fault, power flow control of the double-circuit transmission line can still be achieved. The unified power flow controller is small in occupied space, low in cost, and excellent in economy, flexibility and reliability.
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54.发明公开
公开(公告)号：EP3082212A4
公开(公告)日：2017-01-18
申请号：EP15796911
申请日：2015-01-22
发明人： HU MING , SHAO ZHENXIA , JIAO XINYAN , TIAN JIE , LU YU , SHEN GANG
CPC分类号： H02J3/36 , H02M5/4585 , Y02E60/60
摘要： The present invention discloses a tripolar VSC-HVDC system and method, wherein a rectifier and an inverter consist of a three-phase six-bridge arms modular multilevel converter (MMC) respectively, and two converter valves are arranged on the DC side of the rectifier and inverter respectively, the midpoint of upper and lower converter valves of the rectifier and inverter are connected with a pole 3 DC line by a smoothing reactor, triggering of the upper and lower converter valves is controlled to change the DC voltage polarity of the pole 3 periodically, and tripolar DC transmission is realized by modulating current orders of the three poles. The technical solution provided by the invention can make full use of the three conductors for power transmission, has the characteristics of small occupied space of the converter station, low total conversion cost and high reliability, and it is particularly suitable for the implementation of conversion an AC line to a DC line for capacity increasing in large-sized urban power supply systems lacking in land resources.
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55.发明公开APPARATUS FOR LIMITING CURRENT OF CIRCUIT OR BREAKING CURRENT, AND CONTROL METHOD THEREOF 有权设备以便在其限制了一个开关或控制方法电源和关闭
公开(公告)号：EP2953150A4
公开(公告)日：2016-10-19
申请号：EP13873552
申请日：2013-12-27
发明人： WANG YU , CAO DONGMING , FANG TAIXUN , YANG HAO , YANG BING , SHI WEI , LU WEI
CPC分类号： H02H3/08 , H01H9/542 , H01H9/548 , H01H33/596 , H01H71/1045 , H01H2009/0083 , H02H9/02
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56.发明公开APPARATUS FOR LIMITING CURRENT OF CIRCUIT OR BREAKING CURRENT, AND CONTROL METHOD THEREOF 有权设备以便在其限制了一个开关或控制方法电源和关闭
公开(公告)号：EP2953150A1
公开(公告)日：2015-12-09
申请号：EP13873552.7
申请日：2013-12-27
发明人： WANG, Yu , CAO, Dongming , FANG, Taixun , YANG, Hao , YANG, Bing , SHI, Wei , LU, Wei
IPC分类号： H01H33/00
CPC分类号： H02H3/08 , H01H9/542 , H01H9/548 , H01H33/596 , H01H71/1045 , H01H2009/0083 , H02H9/02
摘要： An apparatus for limiting a current of a circuit or breaking a current, and a control method thereof are disclosed. The apparatus includes a current breaking branch (29) and a bridge branch. The bridge branch includes two bridge arms formed by four identical current commutation branches. Every two of the four current commutation branches are connected in series, and the formed two bridge arms are then connected in parallel. The two bridge arms are both connected in parallel to the current breaking branch, and middle points of the two bridge arms are separately connected to two ends of a circuit. Each current commutation branch includes at least one high-speed isolation switch (6) and at least one bidirectional power semiconductor switch (10) that are connected in series. The apparatus can turn off currents in two directions.
摘要翻译： 用于限制电路的电流或切断电流的控制方法的装置，以及它们的被游离缺失光盘。 该装置包括一个电流切断分支（29）和一个桥支路。 桥支路包括由四个相同的电流换向分支形成的两个桥臂。 四个电流换向分支机构的每两个串联连接，然后形成了两个桥臂并联连接。 所述两个桥臂并联连接这两个的电流切断分支，两个桥臂的中间点分别连接到电路的两端。 每个电流换向分支包括至少一个高速隔离开关（6），并且被串联连接的至少一个双向功率半导体开关（10）。 该装置可以在两个方向关闭电流。
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57.发明公开
公开(公告)号：EP4184742A1
公开(公告)日：2023-05-24
申请号：EP21866072.8
申请日：2021-09-10
发明人： ZHAN, Changjiang , HU, Zhaoqing , SHAO, Zhenxia , LI, Gang , DONG, Yunlong , LU, Yu
IPC分类号： H02J3/36
摘要： The application provides a discharge method and device for a voltage sourced converter direct-current transmission line and a storage medium. The method comprises: unlocking a converter valve; generating an additional control signal by an additional controller and superimposing the additional control signal on a reference voltage output by a main controller of the voltage sourced converter direct-current transmission system, so that the converter valve generates a harmonic current in a three-phase bridge arm of a converter; and when a direct-current transmission line voltage is lower than a voltage setting or an average voltage of normal operating submodules in the converter bridge arm is lower than a submodule operating voltage setting, locking the converter.
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58.发明公开
公开(公告)号：EP3823148A1
公开(公告)日：2021-05-19
申请号：EP19856842.0
申请日：2019-08-28
发明人： XIE, Yeyuan , TIAN, Jie , ZHANG, Zhongfeng , YANG, Chen , LI, Haiying , CAO, Dongming , WANG, Yu
摘要： A unidirectional DC voltage conversion device and system and a method for controlling the same. The unidirectional DC voltage conversion device comprises a front end circuit (2), a main power circuit (1), a preceding-stage auxiliary isolation switch (5), and a subsequent-stage auxiliary isolation switch (6). A preceding-stage port of the main power circuit (1) and a subsequent-stage port of the front end circuit (2) form a cascade connection. The preceding-stage auxiliary isolation switch (5) is connected to a negative terminal (8) of a preceding-stage port of the front end circuit (2), and forms, together with a positive terminal (7) of the preceding-stage port of the front end circuit (2), a first input port of the unidirectional DC voltage conversion device. The subsequent-stage auxiliary isolation switch (6) is connected to a negative terminal (10) of a subsequent-stage port of the main power circuit (1), and forms, together with a positive terminal (9) of the subsequent-stage port of the main power circuit (1), a first output port of the unidirectional DC voltage conversion device.
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59.发明公开
公开(公告)号：EP3799244A1
公开(公告)日：2021-03-31
申请号：EP19819033.2
申请日：2019-03-20
发明人： XIE, Yeyuan , WANG, Yu , LIAN, Jianyang , DUAN, Jun , LIU, Hongde
IPC分类号： H02J3/32
摘要： Provided in the present application is an energy storage unit separated converter, and a system thereof, and a control method thereof. The energy storage unit separated converter comprises a power electronic conversion unit, at least one separated energy storage unit, and a first switch set; the first switch set is in series connection between the energy storage unit and a direct current side of the power electronic conversion unit, and the energy storage unit and the power electronic conversion unit may be separated by means separating a positive electrode switch and negative electrode switch in the first switch set.
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公开(公告)号：EP3796499A1
公开(公告)日：2021-03-24
申请号：EP19819414.4
申请日：2019-04-01
发明人： XIE, Yeyuan , LI, Haiying , WANG, Yu , ZHANG, Zhongfeng , CAO, Dongming
IPC分类号： H02H7/26
摘要： A multi-voltage level direct current grid system and a control protection method, the direct current grid system comprising: at least two direct current buses; at least one direct current transformer, one end of which is connected to a first direct current bus while another end is connected to a second direct current bus or a lead-out wire, which may achieve direct current voltage conversion; and at least one lead-out wire current limiter, one end of the lead-out wire current limiter being connected to the second direct current bus while another end is connected to the lead-out wire; the lead-out wire current limiter comprises a first current-limiting unit, and the first current limiting unit comprises a group of direct current switches, as well as a first bypass switch and a first current-limiting resistor unit that are connected in parallel. By means of increasing the input of the current-limiting resistor unit and lowering fault current change rate, the protection of devices in a direct current grid is facilitated; during a fault, the direct current transformer may not be locked up, which facilitates rapid recovery of the system once the fault is eliminated.
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