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21. 发明公开

EP3316293A1 THYRISTOR ASSEMBLY RADIATOR FOR DC CONVERTER VALVE 有权
标题翻译：直流转换阀用THYRISTOR组装散热器
公开(公告)号：EP3316293A1
公开(公告)日：2018-05-02
申请号：EP16829756.2
申请日：2016-07-13
申请人： NR Electric Co., Ltd. , NR Engineering Co., Ltd , NR Electric Power Electronics Co., Ltd.
发明人： ZHANG, Xiang , FANG, Taixun , CAO, Dongming , CHEN, Chihan , ZHANG, Guangtai , LIU, Haibin
IPC分类号： H01L23/473 , H01L23/367 , H03K17/72
CPC分类号： H01L23/473 , H01C1/08 , H01L23/367 , H01L25/117 , H03K17/72
摘要： A thyristor assembly radiator for a DC converter valve. A water discharging port of an N th radiator is communicated with a water discharging port of an (N-2) th radiator. A water feeding port of the N th radiator is communicated with a water feeding port of an (N+2) th radiator. Or, a water feeding port of the N th radiator is communicated with a water feeding port of the (N-2) th radiator, and a water discharging port of the N th radiator is communicated with a water discharging port of the (N+2) th radiator. A water discharging port of an M th radiator is communicated with a water discharging port of an (M-2) th radiator, and a water feeding port of the M th radiator is communicated with a water feeding port of an (M+2) th radiator, or a water feeding port of an M th radiator is communicated with a water feeding port of the (M-2) th radiator, and a water discharging port of the M th radiator is communicated with a water discharging port of an (M+2) th radiator. Water feeding ports of the last two radiators are communicated. According to the radiator, the number of joints of a cooling system is reduced, the risk of leakage is lowered, the operation reliability of a converter valve is improved, the maintenance difficulty is lowered, and the maintenance time is shortened.
摘要翻译：用于直流转换器阀门的晶闸管组件散热器。第N散热器的排水口与第（N-2）散热器的排水口连通。第N散热器的给水口与第（N + 2）散热器的给水口连通。或者，第N个散热器的进水口与第（N-2）个散热器的进水口连通，第N个散热器的出水口与第（N + 2）个散热器的出水口连通， th散热器。第M散热器的出水口与第（M-2）散热器的出水口连通，第M散热器的给水口与第（M + 2）散热器的给水口连通或者第M散热器的给水口与第（M-2）散热器的给水口连通，第M散热器的出水口与（M + 2）散热器的出水口连通， th散热器。最后两个散热器的供水口相互通信。根据散热器，减少了冷却系统的接头数量，降低了泄漏的风险，改善了换流阀的操作可靠性，维修难度降低，维修时间缩短。

22. 发明公开

EP3211743A1 ISLAND-TO-NETWORK SWITCHING METHOD 有权
标题翻译：岛屿到网络切换方法
公开(公告)号：EP3211743A1
公开(公告)日：2017-08-30
申请号：EP15871856.9
申请日：2015-12-09
申请人： NR Electric Co., Ltd. , NR Engineering Co., Ltd
发明人： DONG, Yunlong , TIAN, Jie , HU, Zhaoqing , LI, Haiying , CAO, Dongming , LIU, Haibin , LU, Yu
IPC分类号： H02J3/36 , H02J3/38
CPC分类号： H02J3/36 , H02H7/1222 , H02J3/38 , H02J2003/388 , H03L7/08 , Y02E60/60
摘要： The present invention discloses a passive islanding to grid-connection switching method for a VSC HVDC transmission system. When the VSC HVDC transmission system in an island operation state, whether the VSC HVDC transmission system enters a grid-connection state is determined by detecting whether an overcurrent phenomenon has occurred in a converter valve-side three-phase alternating-current or a converter bridge arm current, and detecting a change status of an alternating-current side voltage. The system is controlled to switch from an island operation control mode to a grid-connection control mode. At a moment of switching, the online control mode is smoothly switched to by changing a power instruction and performing phase tracking on a current grid voltage, so that continuous operation of the system is maintained.
摘要翻译：本发明公开了一种用于VSC HVDC传输系统的被动孤岛 - 并网切换方法。当处于孤岛运行状态的VSC HVDC传输系统时，VSC HVDC传输系统是否进入并网状态通过检测转换器阀侧三相交流电流或转换器电桥中是否发生过电流现象来确定检测交流侧电压的变化状态。控制系统从岛运行控制模式切换到并网控制模式。在切换时，通过改变功率指令并对当前电网电压执行相位跟踪，在线控制模式被平稳切换，从而保持系统的连续操作。

23. 发明公开

EP3211741A1 METHOD FOR INHIBITING MULTIPLE CONVERTER STATIONS INTO PASSIVE CONTROL MODE IN ISLAND STATE 有权
标题翻译：在岛状态下抑制多个变流站进入被动控制模式的方法
公开(公告)号：EP3211741A1
公开(公告)日：2017-08-30
申请号：EP15868517.2
申请日：2015-11-24
申请人： NR Electric Co., Ltd. , NR Engineering Co., Ltd
发明人： DONG, Yunlong , TIAN, Jie , CAO, Dongming , LI, Haiying , DING, Jiudong , HU, Zhaoqing , LI, Gang , LIU, Haibin , LU, Yu
IPC分类号： H02J3/00
CPC分类号： H02J3/46 , H02J1/10 , H02J3/00 , H02J3/005 , H02J3/36 , H02J3/38 , H02J2003/001 , H02J2003/388
摘要： The present invention provides a method for inhibiting multiple inverter stations from entering a passive control mode in an island state. The method includes dividing inverter stations into groups in advance; a principle for group division is dividing inverter stations whose alternating-current sides are connected to each other through an alternating-current line in a normal running condition into a group; priorities of the inverter stations are preset in each group to tune relevant fixed values of the inverter stations for island detection; a tuning principle is that an inverter station with a higher priority has a more sensitive relevant fixed value, and an island state is more easily detected for the corresponding inverter station; an inverter station for which an island state is detected can enter a passive control mode only when all the other inverter stations with priorities higher than the priority of the inverter station in the group send enabling signals.
摘要翻译：本发明提供了一种用于抑制多个逆变站进入孤岛状态的被动控制模式的方法。该方法包括预先将逆变站分成组，分组原则是将正常运行状态下交流线路交流侧互相连接的逆变站分为一组，每组预置逆变站的优先级，以调谐逆变站的相关固定值进行岛屿检测; 调谐原则是优先级较高的逆变站具有更敏感的相关固定值，并且对于相应的逆变站更容易检测岛状态; 只有当所有其他优先级高于组内逆变站优先级的逆变站发送使能信号时，才能检测到岛状态的逆变站才能进入被动控制模式。

24. 发明公开

EP2999103A1 SUB-MODULE, PROTECTION UNIT, CONVERTER, AND CONTROL METHOD THEREOF 有权转让
标题翻译：子模块保护单位转换器及其控制方法
公开(公告)号：EP2999103A1
公开(公告)日：2016-03-23
申请号：EP14797222.8
申请日：2014-05-05
申请人： NR Electric Co., Ltd. , NR Engineering Co., Ltd
发明人： DONG, Yunlong , CAO, Dongming , TIAN, Jie , LI, Haiying , WANG, Nannan
IPC分类号： H02M1/00 , H02M7/797
CPC分类号： H02M1/32 , H02M2007/4835
摘要： Disclosed are a sub-module structure formed of an energy storage element, a first turn-off device, a second turn-off device, a third turn-off device, a freewheeling diode, a series resistor, and diodes respectively in antiparallel connection with the turn-off devices, and a converter completely or partially formed of the sub-modules. Also disclosed are a relevant protection unit and a control method for the converter. The converter can be locked when a direct current (DC) fault occurs to prevent an alternating current (AC) system from injecting a fault current into a DC network, so that a transient fault of the DC network can be removed without tripping an AC line switch, thereby rapidly restarting the system. A charging resistor is comprised in the sub-module so that a charging resistor disposed at an AC side of the converter can be reduced and even may not be dispose.

25. 发明公开

EP3113311A1 DIRECT-CURRENT TRANSMISSION PROTECTION APPARATUS, CURRENT CONVERTER, AND PROTECTION METHOD 审中-公开
标题翻译： 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
申请人： NR Electric Co., Ltd. , NR Electric Engineering Co., Ltd.
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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