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21. 发明公开

EP3958454A1 SOLID-STATE TRANSFORMER 无效
公开(公告)号：EP3958454A1
公开(公告)日：2022-02-23
申请号：EP20854635.8
申请日：2020-07-15
申请人： NR ELECTRIC CO., LTD. , NR Engineering Co., Ltd.
发明人： ZHANG, Zhongfeng , XIE, Yeyuan , CAO, Dongming , FANG, Taixun , SHENG, Xiaodong , YANG, Chen , LIAN, Jianyang
IPC分类号： H02M5/458
摘要： A solid-state transformer comprises a plurality of power units (100). Each of the plurality of power units (100) comprises a high-voltage side module (110), a low-voltage side module (120), and an isolation transformer (130). The isolation transformer (130) comprises a high-voltage winding (131), a low-voltage winding (132), and an iron core (133). The high-voltage winding (131) is wound on the iron core (133) and connected to the high-voltage side module (110). The low-voltage winding (132) is wound on the iron core (133) and connected to the low-voltage side module (120). The iron core (133) is in near equipotential connection to the high-voltage side module (110) or the low-voltage side module (120) by means of a conductive medium to fix the floating potential of the iron core (133).

22. 发明授权

EP3051653B1 METHOD AND APPARATUS FOR CONTROLLING DIRECT-CURRENT VOLTAGE 有权转让
公开(公告)号：EP3051653B1
公开(公告)日：2020-11-18
申请号：EP14846869.7
申请日：2014-09-25
申请人： NR Electric Co., Ltd. , NR Engineering Co., Ltd
发明人： DONG, Yunlong , TIAN, Jie , LI, Haiying , CAO, Dongming
IPC分类号： H02J3/36 , H02J13/00

23. 发明公开

EP3672008A1 SERIES COMPENSATOR, AND CONTROL METHOD 有权
公开(公告)号：EP3672008A1
公开(公告)日：2020-06-24
申请号：EP18891849.4
申请日：2018-09-11
申请人： NR Electric Co., Ltd. , NR Engineering Co., Ltd.
发明人： PAN, Lei , TIAN, Jie , CAO, Dongming , DONG, Yunlong , ZHOU, Qiwen , HUANG, Ruhai , DING, Fengfeng
IPC分类号： H02H9/02
摘要： The present invention provides a series compensator and a control method. The series compensator includes a series transformer, a series transformer bypass device, a voltage source converter, a high-speed converter bypass device, a high-speed switch, and a reactor. The reactor and the high-speed switch are connected in parallel to form a current limiting module; one winding of the series transformer has two ends connected in series to a line, and the other winding thereof is sequentially connected to the current limiting module and the high-speed converter bypass device; the voltage source converter and the high-speed converter bypass device are connected in parallel; and at least one winding of the series transformer are connected in parallel to at least one series transformer bypass device. The series compensator of the present invention indirectly provides the current limiting module, so as to effectively limit the short-circuit current of a system, reduce the fault current to which the compensator is subjected, and improve the reliability of an alternating current system and the series compensator. Moreover, the current limiting module has a low voltage level, and the high-speed switch has a small breaking current, thereby providing good industrial applicability.

24. 发明公开

EP3051653A1 METHOD AND APPARATUS FOR CONTROLLING DIRECT-CURRENT VOLTAGE 有权转让
标题翻译： VERFAHREN UND VORRICHTUNG ZUR STEUERUNG VON GLEICHSPANNUNG
公开(公告)号：EP3051653A1
公开(公告)日：2016-08-03
申请号：EP14846869.7
申请日：2014-09-25
申请人： NR Electric Co., Ltd. , NR Engineering Co., Ltd
发明人： DONG, Yunlong , TIAN, Jie , LI, Haiying , CAO, Dongming
IPC分类号： H02J3/36
摘要： The present invention discloses a direct current (DC) voltage control method, including: determining, when it is determined that a DC voltage primary control station loses a DC voltage control function, whether the DC voltage primary control station can communicate with the DC voltage secondary control station, and if yes, sending, by the DC voltage primary control station, information about the DC voltage primary control station losing the DC voltage control function to the at least one DC voltage secondary control station and enabling a DC voltage control function of one DC voltage secondary control station, so as to adjust a DC voltage; before the DC voltage control function of the DC voltage secondary control station is enabled, if the DC voltage exceeds an operation range, enabling, by the at least one DC voltage secondary control station, a DC voltage auxiliary control function, so as to adjust emitted or absorbed active power; and when the DC voltage primary control station cannot communicate with all of or some of the at least one DC voltage secondary control station, and if the DC voltage exceeds the operation range, enabling, by at least one DC voltage secondary control station, a DC voltage auxiliary control function, so as to adjust current emitted or absorbed active power, and determining, according to a policy, one DC voltage secondary control station to enable a DC voltage control function, so as to adjust the DC voltage. The present invention further discloses an apparatus for implementing the method. With the present invention, DC voltage oscillation of a system, which is caused when a DC voltage primary control station stops running, may be reduced:
摘要翻译：本发明公开了一种直流（DC）电压控制方法，包括：当确定直流电压主控制站失去直流电压控制功能时，确定直流电压主控制站是否可以与直流电压次级控制站，如果是，则通过所述直流电压主控站向所述至少一个直流电压次级控制站发送关于直流电压主控制站失去直流电压控制功能的信息，并且实现一个直流电压控制功能直流电压二级控制站，以调整直流电压; 在使用直流电压二次控制站的直流电压控制功能之前，如果直流电压超过工作范围，则由至少一个直流电压次级控制站使能直流电压辅助控制功能，或吸收有功功率; 并且当所述直流电压主控制站不能与所述至少一个直流电压次级控制站的全部或者一部分通信时，并且如果所述直流电压超过所述运行范围，则通过至少一个直流电压次级控制站使能DC 电压辅助控制功能，以调节电流发射或吸收的有功功率，并根据策略确定一个直流电压二级控制站，以实现直流电压控制功能，从而调节直流电压。本发明还公开了一种用于实现该方法的装置。通过本发明，可以减少在直流电压一次控制站停止运行时引起的系统的直流电压振荡，

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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