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1. 发明申请

US20170018919A1 PREVENTION METHOD OF ABNORMAL ACTION PROTECTION OF UHV REGULATING COMPENSATION TRANSFORMER WITH NO-LOAD INPUT 审中-公开
标题翻译：具有无负载输入的特高压调节补偿变压器的异常动作保护方法
公开(公告)号：US20170018919A1
公开(公告)日：2017-01-19
申请号：US15076664
申请日：2016-03-22
申请人： XJ GROUP CORPROATION , XJ ELECTRIC CO.,LTD , XUCHANG XJ SOFTWARE TECHNOLOGIES LTD , STATE GRID CORPORATION OF CHINA
发明人： Jirui Chen , Jiansong Zhao , Yun Gong , Maojun Deng , Chuankun Ni , Dongxiao Yao , Heke Ma , Lijuan Lv , Baowei Li , Xu Li , Jidong Huang , Feng Xiao , Shasha Hu , Jingli Zhang , Yingying Xi
IPC分类号： H02H7/045
CPC分类号： H02H7/045
摘要： The present invention relates to a prevention method of abnormal action protection of UHV regulating compensation transformer with no-load input, the prevention method includes: first determining a value of differential current of regulating compensation transformer, if the value of differential current is smaller than a pre-setting threshold, then, identifying whether an uninterruptible point of differential current waveform meets an pre-setting regulation according to original value of differential current or sampling value of differential difference current, and determining comprehensively whether the regulating compensation transformer is in no-load input or in fault directly with a value of second harmonic content of logic differential current together; if a value of differential current before pre-setting period is larger than the pre-setting threshold, the regulating compensation transformer is diagnosed to have external CT saturation, determining comprehensively whether the regulating compensation transformer is in no-load input or in fault by using result of the uninterruptible point after delaying and the value of second harmonic content of logic difference together, and corresponding inactivating or activating differential protection. By using the value of differential current before a pre-setting period, characteristics of the original value of differential current and the sampling value of differential difference current, and second harmonic inrush to discriminate an pre-setting regulation, the present invention can avoid the regulating compensation transformer occurring abnormal action when no-load switching transformer of UHV substation is charging, and isolating the fault quickly when the no-load switching transformer is in fault state.
摘要翻译：本发明涉及一种空载输入特高压调压补偿变压器异常动作保护的预防方法，其预防方法包括：首先确定调压补偿变压器的差动电流值，如果差动电流值小于预设阈值，然后根据差分电流的原始值或差分电流的采样值，确定差动电流波形的不间断点是否满足预设调节，并综合判断调节补偿变压器是否空载输入或故障直接与逻辑差分电流的二次谐波含量值一起; 如果预设周期之前的差分电流值大于预设阈值，则调节补偿变压器被诊断为具有外部CT饱和，全面确定调节补偿变压器是空载输入还是故障使用延迟后不间断点的结果和逻辑差异的二次谐波含量的值一起，以及相应的失活或激活差动保护。通过在预设周期之前使用差分电流的值，差分电流的原始值的特性和差分电流的采样值以及二次谐波涌入来区分预设调节，本发明可以避免调节特高压变电站空载开关变压器正在充电时，补偿变压器发生异常动作，空载开关变压器处于故障状态时快速隔离故障。

2. 发明授权

US10090670B2 Prevention method of abnormal action protection of UHV regulating compensation transformer with no-load input 有权
公开(公告)号：US10090670B2
公开(公告)日：2018-10-02
申请号：US15076664
申请日：2016-03-22
申请人： XJ GROUP CORPORATION , XJ ELECTRIC CO., LTD , XUCHANG XJ SOFTWARE TECHNOLOGIES LTD , STATE GRID CORPORATION OF CHINA
发明人： Jirui Chen , Jiansong Zhao , Yun Gong , Maojun Deng , Chuankun Ni , Dongxiao Yao , Heke Ma , Lijuan Lv , Baowei Li , Xu Li , Jidong Huang , Feng Xiao , Shasha Hu , Jingli Zhang , Yingying Xi
IPC分类号： H02H3/08 , H02H3/087 , H02H9/02 , H02H3/10 , H02H7/045
摘要： The present invention relates to a prevention method of abnormal action protection of UHV regulating compensation transformer with no-load input, the prevention method includes: first determining a value of differential current of regulating compensation transformer, if the value of differential current is smaller than a pre-setting threshold, then, identifying whether an uninterruptible point of differential current waveform meets an pre-setting regulation according to original value of differential current or sampling value of differential difference current, and determining comprehensively whether the regulating compensation transformer is in no-load input or in fault directly with a value of second harmonic content of logic differential current together; if a value of differential current before pre-setting period is larger than the pre-setting threshold, the regulating compensation transformer is diagnosed to have external CT saturation, determining comprehensively whether the regulating compensation transformer is in no-load input or in fault by using result of the uninterruptible point after delaying and the value of second harmonic content of logic difference together, and corresponding inactivating or activating differential protection. By using the value of differential current before a pre-setting period, characteristics of the original value of differential current and the sampling value of differential difference current, and second harmonic inrush to discriminate an pre-setting regulation, the present invention can avoid the regulating compensation transformer occurring abnormal action when no-load switching transformer of UHV substation is charging, and isolating the fault quickly when the no-load switching transformer is in fault state.

3. 发明申请

US20160320437A1 Frequency Measuring Method and Measuring Device For Electricity System 审中-公开
标题翻译：频率测量方法和电力系统测量装置
公开(公告)号：US20160320437A1
公开(公告)日：2016-11-03
申请号：US15075793
申请日：2016-03-21
申请人： XJ GROUP CORPORATION , XJ ELECTRIC CO.,LTD , XUCHANG XJ SOFTWARE TECHNOLOGIES LTD , STATE GRID CORPORATION OF CHINA
发明人： Li Wang , Chuankun Ni , Baowei Li , Xu Li , Wenzheng Li , Yanmei Tang , Xin Shi , Huizhen Hao , Liping Meng
IPC分类号： G01R23/02
CPC分类号： G01R23/02
摘要： The invention relates to a frequency measuring method and measuring device. The method comprises: firstly sampling the current signal to be measured, and discretizing the sampled signals; secondly obtaining sampling matrixes [In] and [In,] of the current signal to be measured at time n and time n−1 from the discrete sampled signals, setting a reference frequency fref, constructing a reference voltage signal u(t) from fref, and discretizing u(t) to gain reference matrix; finally, attaining phase values of time n and time n−1 from the eigenvalues of matrixes [In]+[U] and [In−1]+[U], and determining a calculation frequency fcomp. The invention uses sampled matrixes constructed from the reference signals and the signals to be measured. Through QR decomposition and similarity transformation of matrixes and the eigenvalues calculation of the corresponding matrixes, phases of the matrixes to be measured are gained, and the frequencies of the signals to be measured are calculated through the phase difference between the former and the latter sampling moment. The solution simplifies calculating process and reduces calculation, in comparison to the prior art, and can calculate the frequencies of the sinusoidal signals quickly and precisely in the power frequency data window.
摘要翻译：本发明涉及一种频率测量方法和测量装置。该方法包括：首先对待测量的当前信号进行采样，并对采样信号进行离散化; 其次从离散采样信号获取在时间n和时间n-1要测量的当前信号的采样矩阵[In]和[In，]，设置参考频率fref，从fref构建参考电压信号u（t），并离散u（t）以获得参考矩阵; 最后，从矩阵[In] + [U]和[In-1] + [U]的特征值获得时间n和时间n-1的相位值，并确定计算频率fcomp。本发明使用由参考信号和要测量的信号构成的采样矩阵。通过矩阵的QR分解和相似变换以及相应矩阵的特征值计算，获得要测量的矩阵的相位，并通过前者和后一采样时刻之间的相位差来计算被测信号的频率。与现有技术相比，该解决方案简化了计算过程并减少了计算，并且可以在功率频率数据窗口中快速和精确地计算正弦信号的频率。

4. 发明申请

US20170163024A1 METHOD FOR PREVENTING DIFFERENTIAL PROTECTION MALOPERATION OF OPTICAL FIBER CAUSED BY SATURATION OF SINGLE CT OF 3/2 CONNECTION 审中-公开
公开(公告)号：US20170163024A1
公开(公告)日：2017-06-08
申请号：US15352349
申请日：2016-11-15
申请人： XJ GROUP CORPORATION , XJ ELECTRIC CO.,LTD , Xuchang XJ Software Technology Co.,Ltd , State Grid Corporation of China
发明人： Baowei Li , Chuankun Ni , Wenzheng Li , Xu Li , Ziqiang Jiang , Yanmei Tang , Huizhen Hao , Xin Shi , Jiansong Zhao , Xintao Dong , Yingying Xi , Quanxia Ma , Yantao Qiao , Yu Tang , Liping Meng
IPC分类号： H02H3/28
CPC分类号： H02H3/283
摘要： The present disclosure relates to a method for preventing a maloperation of differential protection of an optical fiber caused by saturation of a single Current Transformer (CT) of 3/2 connection. By applying a combination of the differential judgment and the sub-CT current judgment, reliable identification of internal and external faults is ensured, and the problem of misjudging of the internal fault as the external fault can be prevented as well.

5. 发明授权

US09985428B2 Sampling implementation method and device based on conventional sampling goose trip mode 有权
公开(公告)号：US09985428B2
公开(公告)日：2018-05-29
申请号：US15261173
申请日：2016-09-09
申请人： XJ GROUP CORPORATION , XJ ELECTRIC CO., LTD , Xuchang XJ Software Technology Co., Ltd , State Grid Corporation of China
发明人： Jirui Chen , Maojun Deng , Chuankun Ni , Lijuan Lv , Heke Ma , Dongxiao Yao , Baowei Li , Xu Li , Jidong Huang , Feng Xiao , Shasha Hu , Jingli Zhang , Yingying Xi
IPC分类号： H02H7/26
CPC分类号： H02H7/261
摘要： Sampling implementation method and device based on conventional sampling GOOSE trip mode. CPU of master NPI plug-in, after receiving a second pulse, transmits sampling pulse generation time and a transmission enable bit to FPGA of the master NPI plug-in at a fixed interval; after detecting the transmission enable bit, the FPGA of the master NPI plug-in judges whether time of its internal timer is greater than/equal to the sampling pulse generation time, if yes, generates a sampling pulse to FPGA of collection plug-in; after receiving sampling pulse, the collection plug-in carries out A/D sampling, and transmits sampled data to the master NPI plug-in; when detecting that all A/D samplings are completed, the master NPI plug-in transmits data packets to protection CPU plug-in. The device includes an MMI plug-in, a protection CPU plug-in, a master NPI plug-in and a collection plug-in. Protection maloperation is thereby reduced.

6. 发明授权

US10622804B2 Method for preventing differential protection maloperation of optical fiber caused by saturation of single CT of 3/2 connection 有权
公开(公告)号：US10622804B2
公开(公告)日：2020-04-14
申请号：US15352349
申请日：2016-11-15
申请人： XJ GROUP CORPORATION , XJ ELECTRIC CO., LTD , Xuchang XJ Software Technology Co., Ltd , State Grid Corporation of China
发明人： Baowei Li , Chuankun Ni , Wenzheng Li , Xu Li , Ziqiang Jiang , Yanmei Tang , Huizhen Hao , Xin Shi , Jiansong Zhao , Xintao Dong , Yingying Xi , Quanxia Ma , Yantao Qiao , Yu Tang , Liping Meng
IPC分类号： H02H3/00 , H02H3/28
CPC分类号： H02H3/283
摘要： The present disclosure relates to a method for preventing a maloperation of differential protection of an optical fiber caused by saturation of a single Current Transformer (CT) of 3/2 connection. By applying a combination of the differential judgment and the sub-CT current judgment, reliable identification of internal and external faults is ensured, and the problem of misjudging of the internal fault as the external fault can be prevented as well.

7. 发明申请

US20170070336A1 SAMPLING IMPLEMENTATION METHOD AND DEVICE BASED ON CONVENTIONAL SAMPLING GOOSE TRIP MODE 有权
标题翻译：基于常规采样GOOSE TRIP模式的采样实现方法和设备
公开(公告)号：US20170070336A1
公开(公告)日：2017-03-09
申请号：US15261173
申请日：2016-09-09
申请人： XJ GROUP CORPORATION , XJ ELECTRIC CO.,LTD , Xuchang XJ Software Technelogy Co,Ltd , State Grid Corporation of China
发明人： Jirui Chen , Maojun Deng , Chuankun Ni , Lijuan Lv , Heke Ma , Dongxiao Yao , Baowei Li , Xu Li , Jidong Huang , Feng Xiao , Shasha Hu , Jingli Zhang , Yingying Xi
IPC分类号： H04L7/00
CPC分类号： H02H7/261
摘要： Sampling implementation method and device based on conventional sampling GOOSE trip mode. CPU of master NPI plug-in, after receiving a second pulse, transmits sampling pulse generation time and a transmission enable bit to FPGA of the master NPI plug-in at a fixed interval; after detecting the transmission enable bit, the FPGA of the master NPI plug-in judges whether time of its internal timer is greater than/equal to the sampling pulse generation time, if yes, generates a sampling pulse to FPGA of collection plug-in; after receiving sampling pulse, the collection plug-in carries out A/D sampling, and transmits sampled data to the master NPI plug-in; when detecting that all A/D samplings are completed, the master NPI plug-in transmits data packets to protection CPU plug-in. The device includes an MMI plug-in, a protection CPU plug-in, a master NPI plug-in and a collection plug-in. Protection maloperation is thereby reduced.
摘要翻译：基于常规采样GOOSE跳闸模式的采样实现方法和设备。主NPI插件的CPU在接收到第二个脉冲后，以固定的间隔向主NPI插件的FPGA发送采样脉冲发生时间和发送使能位; 在检测到发送使能位之后，主NPI插件的FPGA判断其内部定时器的时间是否大于/等于采样脉冲发生时间，如果是，则生成采集插件的FPGA采样脉冲; 接收采样脉冲后，采集插件进行A / D采样，并将采样数据发送到主NPI插件; 当检测到所有A / D采样完成时，主NPI插件将数据包传输到保护CPU插件。该设备包括一个MMI插件，一个保护CPU插件，一个主NPI插件和一个集合插件。从而减少了保护误动作。

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