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1. 发明公开

EP3639337A1 METHOD AND CONTROL SYSTEM FOR FAULT DIRECTION DETECTION 有权转让
公开(公告)号：EP3639337A1
公开(公告)日：2020-04-22
申请号：EP17913767.4
申请日：2017-06-15
申请人： ABB Schweiz AG
发明人： LIU, Kai
IPC分类号： H02H7/26

2. 发明公开

EP3269022A1 METHOD AND APPARATUS FOR DETECTION OF POWER SYSTEM DISTURBANCE WITHIN DIGITAL SUBSTATION 有权转让
标题翻译：用于检测数字变电站中的电力系统干扰的方法和设备
公开(公告)号：EP3269022A1
公开(公告)日：2018-01-17
申请号：EP15884251.8
申请日：2015-03-11
申请人： ABB Schweiz AG
发明人： LIU, Kai , LI, Youyi , WANG, Jianping
IPC分类号： H02J13/00 , G01R31/08
CPC分类号： G01R31/085 , G01R31/086 , G01R31/088 , H02H7/265 , H02J13/00 , Y04S10/522
摘要： An objective of the application is to provide a method for detecting a disturbance in a power system within a digital substation and an apparatus using the same. The method includes: sensing electrical parameters at an end of a transmission line; sampling the sensed electrical parameters; extracting traveling-wave information from high frequency component of the samples using a signal processing method; and if the extracted traveling-wave information indicating occurrence of the disturbance, transmitting the extracted traveling-wave information to an intelligent electronic device of the digital substation from a merging unit or non-conventional instrument transformer of the digital substation. As compared with the amount of the sample data of the sensed electrical parameters, the amount of the data representing the extracted traveling-wave information is reduced. Thus the extracted traveling-wave information can be transmitted via a data link with a relatively narrow bandwidth, such as the process bus under standard IEC 61850.

3. 发明授权

EP3405803B1 FAULT DETECTION OF A TRANSMISSION LINE 有权转让
公开(公告)号：EP3405803B1
公开(公告)日：2019-10-09
申请号：EP16701275.6
申请日：2016-01-20
申请人： ABB Schweiz AG
发明人： LI, YouYi , LIU, Kai , WANG, Jianping
IPC分类号： G01R31/08 , H02H7/26 , H02H7/22

4. 发明公开

EP3639336A1 METHOD FOR DETECTING FAULT IN POWER TRANSMISSION LINE AND PROTECTION SYSTEM USING THE SAME 有权转让
公开(公告)号：EP3639336A1
公开(公告)日：2020-04-22
申请号：EP17913766.6
申请日：2017-06-15
申请人： ABB Schweiz AG
发明人： LIU, Kai , WANG, Jianping , LI, Youyi
IPC分类号： H02H7/26

5. 发明公开

EP3443368A1 METHOD, SYSTEM AND APPARATUS FOR FAULT DETECTION IN LINE PROTECTION FOR POWER TRANSMISSION SYSTEM 审中-实审转让
公开(公告)号：EP3443368A1
公开(公告)日：2019-02-20
申请号：EP16898242.9
申请日：2016-04-14
申请人： ABB Schweiz AG
发明人： LIU, Kai , LI, Youyi , WANG, Jianping
IPC分类号： G01R31/08

6. 发明公开

EP3278416A1 TRAVELLING WAVE PROTECTION OF A TRANSMISSION LINE 有权转让
标题翻译：传输线的行波保护
公开(公告)号：EP3278416A1
公开(公告)日：2018-02-07
申请号：EP15713725.8
申请日：2015-03-30
申请人： ABB Schweiz AG
发明人： LIU, Kai , WANG, Jianping , LI, YouYi
IPC分类号： H02H3/28 , H02H7/26
CPC分类号： H02H3/28 , G01R31/08 , G01R31/085 , H02H7/262 , H02H7/263 , H02H7/265
摘要： A mechanism for travelling wave protection of a transmission line and a method for acquiring information of both voltage and current polarities from two ends of a transmission line. The method includes comparing the voltage and current polarities of both ends of the transmission line to each other. The method also includes making a trip decision based on the comparison.

7. 发明公开

EP3218978A1 DC GRID PROTECTION METHOD AND SYSTEM THEREOF 审中-公开
标题翻译：直流电网保护方法及其系统
公开(公告)号：EP3218978A1
公开(公告)日：2017-09-20
申请号：EP14905956.0
申请日：2014-11-13
申请人： ABB Schweiz AG
发明人： LIU, Kai , LI, Youyi , WANG, Jianping
IPC分类号： H02H7/26 , G01R31/08
CPC分类号： H02H7/268 , G01R31/08 , H02H3/42 , H02H7/263 , H02H7/265
摘要： A DC grid protection method and system are provided. The method comprises the following steps: fault detecting step (501): acquiring fault component travelling wave current value △i and fault component travelling wave voltage value △u of a DC line, wherein forward direction is defined extending from the protection to the DC line; fault determining step (502): if △i and △u at fault occurring time meet following criterions, performing fault detection determination step, the criterions include: product of △i and △u being less than a forward value which is bigger than zero and is associated with a predetermined threshold; and absolute value of △i or △u meeting a sensitivity requirement which is determined by the predetermined threshold; fault direction determination step (503): determining the fault as forward fault. Said scheme can overcome the problem in the prior art and implement the pilot protection in the DC system, especially in the HVDC system.
摘要翻译：提供了直流电网保护方法和系统。该方法包括以下步骤：故障检测步骤（501）：获取直流线路的故障分量行波电流值△i和故障分量行波电压值△u，其中正向定义为从保护延伸至直流线路 ; 故障判断步骤（502）：如果故障发生时的△i和△u满足以下判据，则执行故障检测判定步骤，判定标准包括：△i和△u的乘积小于大于零的正向值，以及与预定阈值相关联; 以及△i或△u的绝对值满足由预定阈值确定的灵敏度要求; 故障方向确定步骤（503）：将故障确定为正向故障。该方案可以克服现有技术中存在的问题，实现直流系统，尤其是直流输电系统中的导频保护。

8. 发明公开

EP4196802A1 METHOD OF DETERMINING LINE FAULT OF POWER SYSTEM 审中-实审转让
公开(公告)号：EP4196802A1
公开(公告)日：2023-06-21
申请号：EP20948991.3
申请日：2020-08-11
申请人： ABB SCHWEIZ AG
发明人： LIU, Kai , ZHANG, Qi
IPC分类号： G01R31/08

9. 发明公开

EP3966908A1 POWER CONVERTER AND CONTROL METHOD THEREFOR 有权
公开(公告)号：EP3966908A1
公开(公告)日：2022-03-16
申请号：EP19927979.5
申请日：2019-05-06
申请人： ABB SCHWEIZ AG
发明人： YANG, Xiaobo , LIU, Kai , YUAN, Chunming , XIE, Hailian , HUANG, Xing
IPC分类号： H02J3/36

10. 发明公开

EP3571516A1 METHOD AND CONTROL SYSTEM FOR FAULT DIRECTION DETECTION 有权转让
公开(公告)号：EP3571516A1
公开(公告)日：2019-11-27
申请号：EP17893089.7
申请日：2017-01-22
申请人： ABB Schweiz AG
发明人： LIU, Kai , WANG, Jianping , LI, Youyi
IPC分类号： G01R31/08

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