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1. 发明授权

US09042412B2 Method and apparatus for detecting communication channel delay asymmetry 有权
标题翻译：用于检测通信信道延迟不对称的方法和装置
公开(公告)号：US09042412B2
公开(公告)日：2015-05-26
申请号：US13390962
申请日：2009-12-31
申请人： Bin Su , Youyi Li , Torbjorn Einarsson
发明人： Bin Su , Youyi Li , Torbjorn Einarsson
IPC分类号： H04J3/06 , H02H1/00 , H02H3/30
CPC分类号： H04J3/0682 , H02H1/0061 , H02H3/30 , H04J3/065 , H04J3/0658
摘要： The invention provides a method and apparatus for detecting communication channel delay asymmetry between transmission line protection devices. The method comprises: calculating, repeatedly, clock disparity between clocks of the protection devices and communication delays at different paths of the communication channel; comparing the latest calculated clock disparity and communication delays with previously calculated clock disparities and communication delays, respectively; determining a channel switching has happened if a change of the calculated clock disparity exceeds a first threshold, or a change of the calculated communication delays for any path exceeds a second threshold; and determining the channel delays as asymmetrical if a difference between the calculated communication delays of the different paths after the channel switching exceeds a third threshold.
摘要翻译：本发明提供一种用于检测传输线路保护装置之间的通信信道延迟不对称的方法和装置。该方法包括：重复地计算保护装置的时钟之间的时钟差异和在通信信道的不同路径处的通信延迟; 将最新计算的时钟差异和通信延迟与先前计算的时钟差异和通信延迟进行比较; 如果所计算的时钟视差的改变超过第一阈值或者所计算的任何路径的通信延迟的改变超过第二阈值，则确定频道切换已经发生; 以及如果在频道切换之后所计算的不同路径的通信延迟之间的差超过第三阈值，则将所述信道延迟确定为不对称。

2. 发明申请

US20120147941A1 Method and Apparatus for Detecting Communication Channel Delay Asymmetry 有权
标题翻译：用于检测通信信道延迟不对称的方法和装置
公开(公告)号：US20120147941A1
公开(公告)日：2012-06-14
申请号：US13390962
申请日：2009-12-31
申请人： Bin Su , Youyi Li , Torbjorn Einarsson
发明人： Bin Su , Youyi Li , Torbjorn Einarsson
IPC分类号： H04B17/00
CPC分类号： H04J3/0682 , H02H1/0061 , H02H3/30 , H04J3/065 , H04J3/0658
摘要： The invention provides a method and apparatus for detecting communication channel delay asymmetry between transmission line protection devices. The method comprises: calculating, repeatedly, clock disparity between clocks of the protection devices and communication delays at different paths of the communication channel; comparing the latest calculated clock disparity and communication delays with previously calculated clock disparities and communication delays, respectively; determining a channel switching has happened if a change of the calculated clock disparity exceeds a first threshold, or a change of the calculated communication delays for any path exceeds a second threshold; and determining the channel delays as asymmetrical if a difference between the calculated communication delays of the different paths after the channel switching exceeds a third threshold.
摘要翻译：本发明提供一种用于检测传输线路保护装置之间的通信信道延迟不对称的方法和装置。该方法包括：重复地计算保护装置的时钟之间的时钟差异和在通信信道的不同路径处的通信延迟; 将最新计算的时钟差异和通信延迟与先前计算的时钟差异和通信延迟进行比较; 如果所计算的时钟视差的改变超过第一阈值或者所计算的任何路径的通信延迟的改变超过第二阈值，则确定频道切换已经发生; 以及如果在频道切换之后所计算的不同路径的通信延迟之间的差超过第三阈值，则将所述信道延迟确定为不对称。

3. 发明授权

US08791730B2 Synchronization method for current differential protection 有权
标题翻译：电流差动保护同步方法
公开(公告)号：US08791730B2
公开(公告)日：2014-07-29
申请号：US13876320
申请日：2010-11-09
申请人： Youyi Li , Bin Su , Ying Yang , Torbjorn Einarsson , Zoran Gajic
发明人： Youyi Li , Bin Su , Ying Yang , Torbjorn Einarsson , Zoran Gajic
IPC分类号： H03L7/00
CPC分类号： H03L7/08 , H02H3/283 , H02H3/30 , H02H7/263 , H04J3/0667
摘要： A synchronization method for current differential protection comprises: selecting a point on the transmission line protected by the current differential protection; measuring the current and the voltage of each of the terminals of said transmission line; calculating the compensating voltage at the selected point respectively according to the measured current and the voltage of the each terminal; detecting and calculating the synchronization error by comparing all the compensating voltages.
摘要翻译：电流差动保护的同步方法包括：选择由电流差动保护保护的传输线上的点; 测量所述传输线的每个端子的电流和电压; 根据测量的电流和每个端子的电压分别计算所选点处的补偿电压; 通过比较所有补偿电压来检测和计算同步误差。

4. 发明申请

US20130181755A1 SYNCHRONIZATION METHOD FOR CURRENT DIFFERENTIAL PROTECTION 有权
标题翻译：电流差动保护同步方法
公开(公告)号：US20130181755A1
公开(公告)日：2013-07-18
申请号：US13876320
申请日：2010-11-09
申请人： Youyi Li , Bin Su , Ying Yang , Torbjorn Einarsson , Zoran Gajic
发明人： Youyi Li , Bin Su , Ying Yang , Torbjorn Einarsson , Zoran Gajic
IPC分类号： H03L7/08
CPC分类号： H03L7/08 , H02H3/283 , H02H3/30 , H02H7/263 , H04J3/0667
摘要： A synchronization method for current differential protection comprises: selecting a point on the transmission line protected by the current differential protection; measuring the current and the voltage of each of the terminals of said transmission line; calculating the compensating voltage at the selected point respectively according to the measured current and the voltage of the each terminal; detecting and calculating the synchronization error by comparing all the compensating voltages.
摘要翻译：电流差动保护的同步方法包括：选择由电流差动保护保护的传输线上的点; 测量所述传输线的每个端子的电流和电压; 根据测量的电流和每个端子的电压分别计算所选点处的补偿电压; 通过比较所有补偿电压来检测和计算同步误差。

5. 发明授权

US10393810B2 Method for identifying the fault by current differential protection and device thereof 有权
公开(公告)号：US10393810B2
公开(公告)日：2019-08-27
申请号：US14405292
申请日：2012-06-06
申请人： Youyi Li , Kai Liu , Bin Su
发明人： Youyi Li , Kai Liu , Bin Su
IPC分类号： G01R31/327 , H02H3/28
摘要： The present invention discloses a method for identifying the fault by current differential protection and a device thereof. The method comprises: measuring the full component currents of the two terminals of a two-terminal line system and calculating the corresponding fault component current vectors; obtaining an operate value by calculating a first difference between an absolute value of the sum of the fault component current vectors and Iset1; obtaining a restrain value by multiplying a second difference with a control factor, in which the second difference is calculated between the maximum of the absolute values of the fault component currents and Iset2 or between the absolute value of the difference of said fault component currents and Iset2; and identifying a fault as an external one or internal one by comparing the operate value with the restrain value. The solutions of the present invention achieve better reliability, sensitivity and faster speed than existing products.

6. 发明申请

US20120206149A1 Method and Apparatus for Ground Distance Protection 审中-公开
标题翻译：地面距离保护方法与装置
公开(公告)号：US20120206149A1
公开(公告)日：2012-08-16
申请号：US13503711
申请日：2009-11-18
申请人： Bin Su , Youyi Li , Ying Yang
发明人： Bin Su , Youyi Li , Ying Yang
IPC分类号： G01R31/12
CPC分类号： H02H3/402
摘要： The invention relates to a ground distance protection method, which comprises: measure local source impedance based on fault component at both ends (M, N) of the transmission line in the case of a ground distance fault has occurred. Send the measured local source impedance from a first end to a second end. Adjust a protection criterion at the second end based on the measured impedance. And, judge the ground fault as an internal fault or an external fault according to the adjusted protection criterion. The invention also relates to a controller, a piece of software and an apparatus for implementing the same function.
摘要翻译：本发明涉及一种地面距离保护方法，其包括：在发生地面距离故障的情况下，基于传输线两端（M，N）的故障分量测量局部源阻抗。将测量的本地源阻抗从第一端发送到第二端。根据测量的阻抗调整第二端的保护标准。并根据调整后的保护标准判断接地故障为内部故障或外部故障。本发明还涉及一种用于实现相同功能的控制器，软件和装置。

7. 发明申请

US20150160297A1 METHOD FOR IDENTIFYING THE FAULT BY CURRENT DIFFERENTIAL PROTECTION AND DEVICE THEREOF 审中-公开
标题翻译：通过电流差分保护识别故障的方法及其装置
公开(公告)号：US20150160297A1
公开(公告)日：2015-06-11
申请号：US14405292
申请日：2012-06-06
申请人： Youyi Li , Kai Lui , Bin Su
发明人： Youyi Li , Kai Lui , Bin Su
IPC分类号： G01R31/327
CPC分类号： G01R31/3278 , H02H3/28 , H02H3/283
摘要： The present invention discloses a method for identifying the fault by current differential protection and a device thereof. The method comprises: measuring the full component currents of the two terminals of a two-terminal line system and calculating the corresponding fault component current vectors; obtaining an operate value by calculating a first difference between an absolute value of the sum of the fault component current vectors and Iset1; obtaining a restrain value by multiplying a second difference with a control factor, in which the second difference is calculated between the maximum of the absolute values of the fault component currents and Iset2 or between the absolute value of the difference of said fault component currents and Iset2; and identifying a fault as an external one or internal one by comparing the operate value with the restrain value. The solutions of the present invention achieve better reliability, sensitivity and faster speed than existing products.
摘要翻译：本发明公开了一种通过电流差动保护来识别故障的方法及其装置。该方法包括：测量两端线路系统的两端的全分量电流，并计算相应的故障分量电流矢量; 通过计算故障分量电流矢量和Iset1的和的绝对值之间的第一差来获得操作值; 通过将第二差异与控制因子相乘获得抑制值，其中在故障分量电流的绝对值和Iset2的绝对值的最大值之间或在所述故障分量电流的差异的绝对值与Iset2之间计算第二差异 ; 并通过将操作值与限制值进行比较来识别故障为外部故障或外部故障。与现有产品相比，本发明的解决方案具有更好的可靠性，灵敏度和更快的速度。

8. 发明授权

US08526333B2 Method for detecting network asymmetrical status and asymmetrical communication channels for power system 有权
标题翻译：电力系统网络非对称状态和非对称通信通道检测方法
公开(公告)号：US08526333B2
公开(公告)日：2013-09-03
申请号：US13147693
申请日：2009-02-09
申请人： Youyi Li , Bin Su
发明人： Youyi Li , Bin Su
IPC分类号： H04L12/28
CPC分类号： H04L43/0852 , H04J3/0638 , H04J3/085 , H04J2203/0042 , H04J2203/006 , H04J2203/0062 , H04L12/437
摘要： The present invention provides a new synchronization method named Multi-Node Echo Method (MNEM), which settles the problem of clock/data synchronization with asymmetrical channels. In MNEM, the echo messages are relayed among multi-node loop both by clockwise and anti-clockwise. Based on Multi-Node Echo Method, the invention further provides a method to detect symmetrical status of a communication network, a method to detect asymmetrical status of any channel in a communication network, and a method to calculate the sending and receiving delay values of any channel in a communication network, even when the channel is asymmetrical.
摘要翻译：本发明提供了一种称为多节点回波方法（MNEM）的新的同步方法，其解决了具有不对称信道的时钟/数据同步的问题。在MNEM中，回波消息在多节点循环中通过顺时针和逆时针中继。基于多节点回波方法，本发明还提供了一种检测通信网络的对称状态的方法，检测通信网络中任何信道的不对称状态的方法，以及计算任何信道的发送和接收延迟值的方法通道在通信网络中，即使通道不对称。

9. 发明申请

US20110286361A1 Method for Detecting Network Asymmetrical Status and Asymmetrical Communication Channels for Power System 有权
标题翻译：电力系统网络非对称状态和不对称通信通道检测方法
公开(公告)号：US20110286361A1
公开(公告)日：2011-11-24
申请号：US13147693
申请日：2009-02-09
申请人： Youyi Li , Bin Su
发明人： Youyi Li , Bin Su
IPC分类号： H04L12/42
CPC分类号： H04L43/0852 , H04J3/0638 , H04J3/085 , H04J2203/0042 , H04J2203/006 , H04J2203/0062 , H04L12/437
摘要： The present invention provides a new synchronization method named Multi-Node Echo Method (MNEM), which settles the problem of clock/data synchronization with asymmetrical channels. In MNEM, the echo messages are relayed among multi-node loop both by clockwise and anti-clockwise. Based on Multi-Node Echo Method, the invention further provides a method to detect symmetrical status of a communication network, a method to detect asymmetrical status of any channel in a communication network, and a method to calculate the sending and receiving delay values of any channel in a communication network, even when the channel is asymmetrical.
摘要翻译：本发明提供了一种称为多节点回波方法（MNEM）的新的同步方法，其解决了具有不对称信道的时钟/数据同步的问题。在MNEM中，回波消息在多节点循环中通过顺时针和逆时针中继。基于多节点回波方法，本发明还提供了一种检测通信网络的对称状态的方法，检测通信网络中任何信道的不对称状态的方法，以及计算任何信道的发送和接收延迟值的方法通道在通信网络中，即使通道不对称。

10. 发明申请

US20110166720A1 FAST POWER SWING UNBLOCKING METHOD AND APPARATUS FOR DISTANCE PROTECTION IN POWER SYSTEM 有权
标题翻译：电力系统中远距离保护的快速断电方法及装置
公开(公告)号：US20110166720A1
公开(公告)日：2011-07-07
申请号：US13002701
申请日：2008-07-07
申请人： Bin Su , Lei Jing , Qianjin Liu
发明人： Bin Su , Lei Jing , Qianjin Liu
IPC分类号： G06F1/30
CPC分类号： H02H3/40 , G01R31/085 , G01R31/088
摘要： The present invention discloses a fast power swing unblocking method and apparatus for a distance protection in a power system, which is able to ensure fast phase-segregated tripping of distance protection for faults during a power swing (3-phase or 2-phase swing). The power swing unblocking method in a power system according to the present invention comprises calculating changing rates of impedances for all operating loops of the distance protection in the power system; and determining a fault loop based on the calculated changing rates. If there is a fault loop, a blocked distance zone for the fault loop is unblocked. Before calculating the changing rates, whether the power system is under a power swing is checked and a distance zone that might mal-operate under the power swing is blocked if it is checked that the power system is under the power swing. By applying this invention, the performance of the distance protection during power swings can be improved, and the distance protection can ensure faster and phase-segregated operation, which are very beneficial for the system reliability.
摘要翻译：本发明公开了一种用于电力系统中的距离保护的快速功率摆幅解锁方法和装置，其能够确保在功率摆动（3相或2相摆动）期间对于故障的距离保护的快速相位偏移脱扣，。根据本发明的电力系统中的功率摆动解锁方法包括计算电力系统中距离保护的所有操作回路的阻抗变化率; 以及基于所计算的变化率来确定故障循环。如果存在故障循环，故障循环的阻塞距离区域将被解除阻塞。在计算变化率之前，检查电力系统是否处于功率摆动状态，如果检查到电力系统处于功率摆动状态，则在功率摆动下可能会运行故障的距离区域被阻止。通过应用本发明，可以提高功率摆动期间的距离保护性能，并且距离保护可以确保更快和相位分离的操作，这对系统的可靠性是非常有益的。

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