公开(公告)号：EP3012643A1

公开(公告)日：2016-04-27

申请号：EP14897888.5

申请日：2014-08-13

申请人： Zhejiang Truly Electric Co. Ltd. ,  State Grid Corporation of China (SGCC) ,  State Grid Zhejiang Hangzhou Yuhang Power Supply Company ,  Hangzhou Power Supply Company of State Grid Zhejiang Electric Power Company ,  State Grid Zhejiang Electric Power Company

发明人： LIU, Lifeng ,  ZHANG, Jing ,  LI, Tiyin ,  LIU, Yi ,  YAO, Haiyan ,  XU, Chao ,  TU, Yongwei

IPC分类号： G01R31/08

摘要： Provided are a method for identifying an overcurrent in an electric cable and a device for the same. The method includes: detecting whether a single-phase overcurrent occurs in three-phase current signals; determining an indicator feature vector sample of an overcurrent phase current signal in a case that it is detected that the single-phase overcurrent occurs in the three-phase current signals; calculating association coefficients between the indicator feature vector sample and predetermined indicator vector reference samples of indicators, where the indicator vector reference samples respectively correspond to reasons for the single-phase overcurrent; calculating association degrees between the indicator feature vector sample and the predetermined indicator vector reference samples based on a predetermined indicator weight vector and the association coefficients corresponding to the indicators; and finding a reason for the single-phase overcurrent, which corresponds to an indicator vector reference sample having a maximal association degree. Hence, an incipient failure of the electric cable is identified.

摘要翻译： 提供了用于识别在过流至电缆和用于该方法的装置的方法。 该方法包括：检测是否在三相电流信号发生了单相的过电流; 在的情况下的过电流的相电流信号的指示器特征向量样本的确定性采矿并在检测做了单相过电流发生在三相电流信号的装置; 计算指标特征向量样本和指标规定指示符向量的参考样本，其中，所述指标向量的参考样本分别对应于原因单相过电流之间的关联系数; 计算指标特征向量样品和基于规定的指标的权重向量和对应于指标的关联系数预定指标向量的参考样本之间的关联度; 和寻找用于单相过电流，其在具有最大关联度指标向量参考样本对应于一个原因。 因此，为了将电线的初始故障被识别。

公开(公告)号：EP3012643B1

公开(公告)日：2020-09-30

申请号：EP14897888.5

申请日：2014-08-13

申请人： Zhejiang Truly Electric Co. Ltd. ,  State Grid Corporation of China (SGCC) ,  State Grid Zhejiang Hangzhou Yuhang Power Supply Company ,  Hangzhou Power Supply Company of State Grid Zhejiang Electric Power Company ,  State Grid Zhejiang Electric Power Company

发明人： LIU, Lifeng ,  ZHANG, Jing ,  LI, Tiyin ,  LIU, Yi ,  YAO, Haiyan ,  XU, Chao ,  TU, Yongwei

IPC分类号： G01R31/08

公开(公告)号：EP2930814A8

公开(公告)日：2016-02-17

申请号：EP14853185.8

申请日：2014-04-22

申请人： State Grid Corporation of China (SGCC) ,  State Grid Zhejiang Hangzhou Yuhang Power Supply Company ,  Hangzhou Power Supply Company of State Grid Zhejiang Electric Power Company ,  State Grid Zhejiang Electric Power Company

发明人： XU, Guojun ,  Han, Yongqiang ,  XU, Huiping ,  LI, Tiyin ,  YAO, Haiyan ,  BAO, Zhengmin ,  QIAN, Hao

IPC分类号： H02J3/38

CPC分类号： H02J3/383 ,  H02J2003/007 ,  Y02E10/563

摘要： The invention provides a method and a system for obtaining a flicker transmission coefficient of grid connection of photovoltaic power stations and defines subtransient reactance of a photovoltaic current transformer by considering that the frequency characteristic of impedance of the photovoltaic current transformer is similar to the subtransient reactance of a synchronous power generator and the subtransient reactance of an induction motor. Furthermore, the subtransient reactance of the photovoltaic current transformer can be obtained by utilizing parameters of the photovoltaic current transformer, so that the flicker transmission coefficient between any two nodes in a multi-port network diagram of a photovoltaic power station group, namely the flicker transmission coefficient of grid connection of the photovoltaic power stations, can be accurately obtained, and the difficult problem in the prior art can be further solved.

公开(公告)号：EP2930814B1

公开(公告)日：2017-10-11

申请号：EP14853185.8

申请日：2014-04-22

申请人： State Grid Corporation of China (SGCC) ,  State Grid Zhejiang Hangzhou Yuhang Power Supply Company ,  Hangzhou Power Supply Company of State Grid Zhejiang Electric Power Company ,  State Grid Zhejiang Electric Power Company

发明人： XU, Guojun ,  Han, Yongqiang ,  XU, Huiping ,  LI, Tiyin ,  YAO, Haiyan ,  BAO, Zhengmin ,  QIAN, Hao

IPC分类号： H02J3/38 ,  H02J3/00

CPC分类号： H02J3/383 ,  H02J2003/007 ,  Y02E10/563

公开(公告)号：EP2930814A1

公开(公告)日：2015-10-14

申请号：EP14853185.8

申请日：2014-04-22

申请人： State Grid Zhejiang Electric Power Company ,  State Grid Corporation of China (SGCC) ,  Hangzhou Power Supply Company of State Grid Zhejiang Electric Power Company

发明人： XU, Guojun ,  Han, Yongqiang ,  XU, Huiping ,  LI, Tiyin ,  YAO, Haiyan ,  BAO, Zhengmin ,  QIAN, Hao

IPC分类号： H02J3/38

CPC分类号： H02J3/383 ,  H02J2003/007 ,  Y02E10/563

摘要： The invention provides a method and a system for obtaining a flicker transmission coefficient of grid connection of photovoltaic power stations and defines subtransient reactance of a photovoltaic current transformer by considering that the frequency characteristic of impedance of the photovoltaic current transformer is similar to the subtransient reactance of a synchronous power generator and the subtransient reactance of an induction motor. Furthermore, the subtransient reactance of the photovoltaic current transformer can be obtained by utilizing parameters of the photovoltaic current transformer, so that the flicker transmission coefficient between any two nodes in a multi-port network diagram of a photovoltaic power station group, namely the flicker transmission coefficient of grid connection of the photovoltaic power stations, can be accurately obtained, and the difficult problem in the prior art can be further solved.