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1.发明公开DIRECT-CURRENT TRANSMISSION PROTECTION APPARATUS, CURRENT CONVERTER, AND PROTECTION METHOD 审中-公开GLEICHSTROMÜBERTRAGUNGSSCHUTZVORRICHTUNG，STROMWANDLER UND SCHUTZVERFAHREN
公开(公告)号：EP3113311A1
公开(公告)日：2017-01-04
申请号：EP14883640.6
申请日：2014-05-04
发明人： CAO, Dongming , XIE, Yeyuan , SHAO, Zhenxia , LU, Yu , LI, Min , LU, Haibin , LI, Haiying
IPC分类号： H02H3/087
CPC分类号： H02H3/202 , H02H7/10 , H02H7/1227 , H02H7/1252 , H02H7/1257 , H02H7/127 , H02M1/32 , H02M7/2173 , H02M2007/4835 , H05K7/20927
摘要： The present invention discloses a direct-current power transmission protection device, including a resistor unit and a bidirectional circulation current switch unit, and the resistor unit and the bidirectional circulation current switch unit being connected in parallel to form the protection device, where at least one resistor is cascaded to form the resistor unit, and at least one bidirectional circulation current switch is cascaded to form the bidirectional circulation current switch unit. In addition, the present invention also provides a converter including the protection device, and at least one protection device is connected in series in each phase unit. The present invention provides the protection device, the converter and a protection method for flexible direct-current power transmission, which can rapidly and effectively suppress direct-current short circuit current and damp current oscillation, and not only can better protect equipment safety, but also can greatly shorten fault current attenuation time, thus shortening direct-current shutdown time and further decreasing economic loss and system destabilization risk caused by shutdown to the max. Moreover, the protection device is structurally simple and low in cost, and has good implementability and economic efficiency.
摘要翻译： 本发明公开了一种直流电力传输保护装置，包括电阻单元和双向循环电流开关单元，电阻单元和双向循环电流开关单元并联连接形成保护装置，其中至少一个 电阻串联形成电阻器单元，并且至少一个双向循环电流开关级联以形成双向循环电流开关单元。 此外，本发明还提供一种包括保护装置的转换器，并且至少一个保护装置在每个相位单元中串联连接。 本发明提供了保护装置，转换器和柔性直流输电的保护方法，可以快速有效地抑制直流短路电流和潮流振荡，不仅可以更好地保护设备的安全性，而且还可以 可以大大缩短故障电流衰减时间，从而缩短直流关断时间，进一步降低关闭到最大时的经济损失和系统不稳定风险。 此外，保护装置的结构简单，成本低，具有良好的可实施性和经济效益。
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2.发明公开TRIPOLAR FLEXIBLE DIRECT-CURRENT POWER TRANSMISSION SYSTEM AND METHOD 审中-公开柔性胶片GLEICHSTROMÜBERTRAGUNGSSYSTEMUND VERFAHREN
公开(公告)号：EP3082212A1
公开(公告)日：2016-10-19
申请号：EP15796911.4
申请日：2015-01-22
发明人： HU, Ming , SHAO, Zhenxia , JIAO, Xinyan , TIAN, Jie , LU, Yu , SHEN, Gang
IPC分类号： H02J3/36
CPC分类号： H02J3/36 , H02J1/08 , 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.
摘要翻译： 本发明公开了一种三极VSC-HVDC系统和方法，其中整流器和逆变器分别由三相六桥臂模块化多电平转换器（MMC）组成，并且两个转换阀布置在整流器的直流侧 和逆变器，整流器和逆变器的上下转换阀的中点通过平滑电抗器与极点3直流线路连接，上下转换阀的触发被控制以改变极点3的直流电压极性 周期性地和三极直流传输通过调节三极的电流顺序来实现。 本发明提供的技术方案可充分利用三根导线进行输电，具有转炉站占用空间小，总转换成本低，可靠性高的特点，特别适用于转换 交流线路到缺乏土地资源的大型城市供电系统的直流线路容量增加。
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公开(公告)号：EP3082212B1
公开(公告)日：2019-05-15
申请号：EP15796911.4
申请日：2015-01-22
发明人： HU, Ming , SHAO, Zhenxia , JIAO, Xinyan , TIAN, Jie , LU, Yu , SHEN, Gang
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4.发明公开
公开(公告)号：EP3890174A1
公开(公告)日：2021-10-06
申请号：EP20858070.4
申请日：2020-06-30
发明人： ZHAN, Changjiang , WANG, Tao , YU, Xiaoyang , PAN, Lei , SHAO, Zhenxia , JIAO, Xinyan , LU, Yu , DONG, Yunlong
IPC分类号： H02M1/32
摘要： A converter apparatus, an assembly of converter apparatuses, a reactive power compensation apparatus, a converter and a method for controlling the converter are disclosed. The converter apparatus (1000) comprises: a switch unit (U1), comprising a first controllable semiconductor device (Q1) and a second controllable semiconductor device (Q2) connected in series; a capacitor (C1) connected to the switch unit (U1) in parallel; and an energy-consuming voltage-equalizing unit (U2) connected with the capacitor (C1) in parallel, and comprising a first resistor (R1), a second resistor (R2) and a third controllable semiconductor device (Q3), wherein the first resistor (R1) and the second resistor (R2) are connected in series, and the third controllable semiconductor device (Q3) is connected with the first resistor (R1) in parallel.
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5.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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