公开(公告)号：US10158223B2

公开(公告)日：2018-12-18

申请号：US13652488

申请日：2012-10-16

Applicant: XJ GROUP CORPORATION ,  STATE GRID CORPORATION OF CHINA

Inventor： Xing Liu ,  Xiaohui Song ,  Yong Wei ,  Guobin Li ,  Dingguo Wang ,  Junfeng Di

IPC: H02H7/28 ,  H02H7/26 ,  H02J3/00

Abstract: The present invention relates to a method for generating a current differential protection supernode based on an electrical topology of a regional distribution network, which belongs to the fields of automation of electrical power systems and relay protection. The present invention generates several supernode differential protection elements, i.e., differential protection objects, and backup differential protection elements by circularly using a depth-first search method according to the inputted branch-node associative data table reflecting the electrical topology of the distribution network. the present invention can accurately located and quickly isolate the faults in the distribution network system, reduce the probability of power cut in the non-fault lines, reduce the coverage of power cut, quickly reconstruct and self-heal the distribution network, and solve the effect of the distributed access system on the distribution network protection.

公开(公告)号：US08773828B2

公开(公告)日：2014-07-08

申请号：US13651482

申请日：2012-10-15

Applicant: XJ Group Corporation ,  State Grid Corporation of China

Inventor： Xiaohui Song ,  Xing Liu ,  Yong Wei ,  Dingguo Wang ,  Guobin Li

IPC: H02H3/00 ,  H02H7/00

CPC classification number: H02H3/38 ,  H02H1/0069 ,  H02H7/226

Abstract: The present invention relates to a busbar differential protection method. For each bay, firstly, zero-crossing point of voltage is determined according to sample values of voltage, then the current values are re-sampled on a current fitting curve by using zero-crossing point of voltage as a synchronous signal according to a given sampling time period to get a sample sequence. The sample sequence is comprised of current values of sampling points and sample serial numbers. The sample serial numbers of sampling points at the same time are same for the sample sequence of respective interval. Finally, computing is done to sample sequences of respective intervals, and differential protection is achieved.

Abstract translation: 母线差动保护方法技术领域本发明涉及一种母线差动保护方法。 对于每个隔间，首先，根据电压的采样值确定电压的过零点，然后根据给定的电压值，通过使用过零点电压作为同步信号在电流拟合曲线上重新采样电流值 采样时间段以获得采样序列。 采样序列由采样点和采样序列号的当前值组成。 对于各个间隔的采样序列，同时采样点的采样序列号相同。 最后，对各个间隔的序列进行计算，实现差分保护。

公开(公告)号：US08959393B2

公开(公告)日：2015-02-17

申请号：US13651423

申请日：2012-10-14

Applicant: XJ Group Corporation ,  State Grid Corporation of China

Inventor： Xiaohui Song ,  Xing Liu ,  Yong Wei ,  Dingguo Wang ,  Jungang Li

IPC: G06F11/00 ,  G06F11/14 ,  G06F11/30

CPC classification number: G06F11/1441 ,  G06F11/3058 ,  H02H1/0084 ,  H02H7/261 ,  H02H7/268 ,  H02J13/0062 ,  H02J13/0079 ,  H02J2003/007 ,  Y02E60/725 ,  Y02E60/76 ,  Y02E60/7838 ,  Y04S10/20 ,  Y04S40/124 ,  Y04S40/22

Abstract: The present invention relates to a centralized and networked protection system and method of regional distribution network, and belongs to the field of electrical system automation and relay protection. The protection system includes at least two centralized protection devices, an intelligent terminal and a communication network module, the centralized protection devices being communication with the intelligent terminal via the communication network module, the intelligent terminal being configured along with switching devices to distribute in each line section, for sampling data, backup protection and executing of tripping and closing commands, the centralized protection devices configured in the monitoring center of the regional distribution network, for generating differential protection elements based on the information sampled by the intelligent terminal and the topologic structure of the regional distribution network; and for determining the region where fault occurs and sending tripping and closing control commands.

Abstract translation: 本发明涉及集中式和网络化的区域配电网络保护系统及方法，属于电气系统自动化和继电保护领域。 保护系统包括至少两个集中保护装置，智能终端和通信网络模块，集中保护装置经由通信网络模块与智能终端通信，智能终端与开关装置一起配置，以分布在每条线路中 部分，采样数据，备用保护和执行脱扣指令，集中保护装置配置在区域分销网络的监控中心，根据智能终端采样信息和拓扑结构生成差分保护元件 区域分销网络; 并确定发生故障的区域并发送跳闸和关闭控制命令。