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1.发明申请DIRECT-CURRENT POWER TRANSMISSION PROTECTION DEVICE, CONVERTER AND PROTECTION METHOD 审中-公开直流电力传输保护装置，转换器和保护方法公开(公告)号：US20170047727A1
公开(公告)日：2017-02-16
申请号：US15118669
申请日：2014-05-04
发明人： Dongming Cao , Yeyuan Xie , Zhenxia Shao , Yu Lu , Min Li , Haibin Lu , Haiying Li
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，并且电阻单元和双向循环电流开关单元并联连接以形成保护装置，其中至少一个 电阻器级联形成电阻器单元，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安全，而且还可以 可以大大缩短故障电流衰减时间，从而缩短直流关机时间，进一步降低停机造成的经济损失和系统不稳定风险。 此外，保护装置结构简单，成本低，具有良好的可实施性和经济效益。
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公开(公告)号：US09948104B2
公开(公告)日：2018-04-17
申请号：US15111216
申请日：2015-01-22
发明人： Ming Hu , Zhenxia Shao , Xinyan Jiao , Jie Tian , Yu Lu , Gang Shen
CPC分类号： H02J3/36 , H02J1/08 , H02M5/4585 , Y02E60/60
摘要： A tripolar VSC-HVDC system and method include a rectifier and an inverter formed by 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.
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公开(公告)号：US20160336751A1
公开(公告)日：2016-11-17
申请号：US15111216
申请日：2015-01-22
发明人： Ming Hu , Zhenxia Shao , Xinyan Jiao , Jie Tian , Yu Lu , Gang Shen
CPC分类号： H02J3/36 , H02J1/08 , H02M5/4585 , Y02E60/60
摘要： A tripolar VSC-HVDC system and method, include a rectifier and an inverter formed by 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.
摘要翻译： 三极VSC-HVDC系统和方法分别包括由三相六桥臂模块化多电平转换器（MMC）形成的整流器和逆变器，并且在整流器和逆变器的直流侧分别布置两个转换器阀。 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直流线连接。 控制上下转换器阀的触发，周期性地改变极点3的直流电压极性，通过调节三极的电流顺序来实现三极直流传输。
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