WO2012142808A1 - 一种用于输电线路接地故障自动定位装置的故障显示器 - Google Patents

一种用于输电线路接地故障自动定位装置的故障显示器 Download PDF

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Publication number
WO2012142808A1
WO2012142808A1 PCT/CN2011/079167 CN2011079167W WO2012142808A1 WO 2012142808 A1 WO2012142808 A1 WO 2012142808A1 CN 2011079167 W CN2011079167 W CN 2011079167W WO 2012142808 A1 WO2012142808 A1 WO 2012142808A1
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Prior art keywords
transmission line
fault
power transmission
main transformer
electric power
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Ceased
Application number
PCT/CN2011/079167
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English (en)
French (fr)
Inventor
王辉
吴才彪
吴健成
潘国强
张子兆
沈超
沈峰
陈勇
鲁志豪
周华
周永宝
鲍长庚
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Shanghai Electric Power Co Ltd
State Grid Corp of China SGCC
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State Grid Shanghai Electric Power Co Ltd
State Grid Corp of China SGCC
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Publication date
Application filed by State Grid Shanghai Electric Power Co Ltd, State Grid Corp of China SGCC filed Critical State Grid Shanghai Electric Power Co Ltd
Publication of WO2012142808A1 publication Critical patent/WO2012142808A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/08—Locating faults in cables, transmission lines, or networks
    • G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
    • G01R31/085—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution lines, e.g. overhead
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
    • Y04S10/52—Outage or fault management, e.g. fault detection or location

Definitions

  • the invention relates to a fault display for a ground fault automatic positioning device for a transmission line. Background technique
  • the measurement result it can be determined that a certain section of the line is grounded or both grounded. Secondly, according to the judgment result, the segmentation search is continued, and the search range is gradually reduced. The grounding range is reduced to a certain extent. , can be arranged for a full inspection along the line.
  • the working principle of the line fault automatic positioning device is that when a single-phase ground fault occurs in the transmission line, a medium resistance is connected to the neutral point of the main transformer bus of the substation to generate a large ground current signal, and is installed.
  • the detection device on the overhead line detects this current signal to achieve the purpose of fault detection and positioning.
  • the above-mentioned detection equipment can be independently designed and installed directly in the necessary position of the overhead line, without considering the original line equipment, but this causes problems such as large research and development workload, large expenditure, high cost, etc., and has become an urgent need for the industry to solve now.
  • the present invention aims to provide a transmission line connection.
  • the fault display of the ground fault automatic positioning device effectively reduces the manufacturing cost under the premise of meeting the working requirements of the fault automatic positioning device.
  • a fault display for a transmission line ground fault automatic positioning device wherein the transmission line is connected to the outlet side of the main transformer of the substation, each transmission line is composed of a three-phase bus, and each transmission line is provided a plurality of nodes, the positioning device comprises a signal source device connected to the busbar side of the main transformer, a plurality of fault displays on each phase bus respectively hooked at each node of each of the power transmission lines, and a plurality of An overhead substation and an information processing center system respectively disposed at each node of each of the transmission lines, wherein the signal source device feeds back a ripple current signal to the main transformer bus side, and the fault display includes a An electromagnetic induction device for receiving the pulsating current signal, a detection control module coupled to the electromagnetic induction device, and an antenna communication device coupled to the detection control module and configured for communication with the overhead substation.
  • the present invention is an improvement on the existing fault display on the transmission line, that is, adding an electromagnetic induction device for sensing the pulsating current signal from the signal source device, and supporting detection control
  • the module uses the module to trigger the antenna communication device to output the fault location information in a wireless communication manner, thereby realizing detection and positioning of the faulty line.
  • the invention reduces the type and quantity of the line equipment, avoids the re-development work of the detecting equipment in the fault automatic positioning device, and greatly saves the cost.
  • FIG. 1 is a schematic diagram showing the structure of a fault display for a ground fault automatic positioning device for a transmission line according to the present invention
  • Fig. 2 is a schematic view showing the installation of a fault display for a ground fault automatic positioning device for a transmission line according to the present invention. detailed description
  • the transmission line 6 is connected to the outlet side of the main transformer 5 of the substation, and each transmission line 6 is composed of a three-phase bus, and each transmission line 6 is provided with a plurality of nodes.
  • the transmission line ground fault automatic positioning device comprises a signal source device 1 connected to the busbar side of the main transformer 5, and a plurality of fault displays 2 on each phase bus respectively hooked at each node of each transmission line 6 Set separately in each An overhead substation 3 at each node of the transmission line 6 and an information processing center system 4, wherein the signal source device 1 is configured to feed back a pulsating current signal to the bus side of the main transformer 5,
  • the present invention is a fault display 2 for a transmission line ground fault automatic positioning device, which comprises an electromagnetic induction device 21 for receiving a ripple current signal, a detection control module 22 connected to the electromagnetic induction device 21, and a The detection control module 22 is connected and used to wirelessly communicate with the overhead substation 3 to connect the antenna communication device 23.
  • the faulty display 2 on the single-phase transmission line 6 can detect the ripple current signal, and the faulty display 2 attached to the other single-phase transmission line 6 where the ground fault does not occur cannot be detected because the loop is not formed; According to this working principle, the fault display 2 of the present invention can determine the single-phase bus in which the transmission line 6 has a ground fault, and since the fault display 2 is provided at each node on each phase bus, the single phase can be The specific fault point of the bus is accurately located.
  • the fault display 2 of the present invention utilizes the principle of electromagnetic induction, that is, the electromagnetic induction device 21 detects the ripple current signal on the transmission line 6, and does not directly contact the core, thereby avoiding the phenomenon of damage due to the flow of a large current;
  • the control module 22 After receiving the fault signal outputted by the electromagnetic induction device 21, the control module 22 performs the processing of the fault information, and triggers the antenna communication device 23 to output the fault location information in a wireless communication manner, and finally sends the short message through the information processing center system 4.
  • the form is sent to the mobile phone or monitoring device 7 of the operating personnel, so that the operating personnel can grasp the safety situation of the transmission line in a timely and accurate manner, save the repair time and improve the working efficiency.
  • the electromagnetic induction device 21 uses a 16F630 chip produced by Microcore Technology Co., Ltd.
  • the detection control module 22 uses a 16-bit micro-processing chip produced by Guangyuan Branch (Beijing) Technology Co., Ltd., and an antenna communication device.
  • 23 uses the TR24A wireless communication module.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Locating Faults (AREA)

Description

一种用于输电线路接地故障自动定位装置的故障显示器 技术领域
本发明涉及一种用于输电线路接地故障自动定位装置的故障显示器。 背景技术
众所周知， 由于自然灾害或其他因素的影响，输电线路难免遭受损坏出现接地 故障， 尤其容易在中、 高压架空输电线路上出现接地故障， 其中最常见的故障是架 空线路单相接地。对于此类故障，检修人员一般是通过检测线路的电压来判明接地 故障的接地点的位置；对于较短的架空输电线路寻找接地点时，可安排人员沿线进 行全面检查； 但是对于较长的架空输电线路寻找接地点时， 宜采用优选法进行， 即 首先在线路长度的 1/2处的耐张杆进行分段， 分别拆开线路三相的引流线， 使整个 线路分为两段， 然后用 2500V兆欧表分别测量三相导线的绝缘电阻， 根据测量结 果可判明线路的某段接地或两段均接地，其次根据判断结果继续分段查找，逐步缩 小查找范围， 待接地范围缩小到一定程度， 可安排人员沿线进行全面检查。
然而， 上述无论是全面检查法， 还是优选法， 都需要检修人员耗费大量的时间 和精力， 工作效率极低。 因此， 业内人士研发了一种线路故障自动定位装置以解决 上述问题。这种线路故障自动定位装置的工作原理是当输电线路发生单相接地故障 时，在变电站主变压器母线中性点短时接入一个中电阻， 以产生一个较大的接地电 流信号， 并通过安装在架空线上的检测设备， 检测这个电流信号， 从而达到故障检 测及定位的目的。
上述检测设备可以独立设计并直接安装在架空线的必要位置，而无需考虑原先 的线路设备， 但是这就造成了研发工作量大、 经费大、 成本高等问题， 也成为了业 内人士现在迫切需要解决的问题。 发明内容
为了解决上述现有技术存在的问题， 本发明旨在提供一种用于输电线路接 地故障自动定位装置的故障显示器， 以在满足故障自动定位装置的工作要求的 前提下， 有效降低制造成本。
本发明所述的一种用于输电线路接地故障自动定位装置的故障显示器， 所 述输电线路连接在变电站主变压器出线侧， 每条输电线路由三相总线构成， 且 每条输电线路上设有若干个节点， 所述定位装置包括一连接在所述主变压器母 线侧的信号源设备、 若干个分别挂接在所述每条输电线路的每个节点处的每相 总线上的故障显示器、 若干个分别设置在所述每条输电线路的每个节点处的架 空子站和一信息处理中心系统， 其中， 所述信号源设备向主变压器母线侧反馈 一脉动电流信号， 所述故障显示器包括一用于接收所述脉动电流信号的电磁感 应装置、 一与该电磁感应装置连接的检测控制模块和一与该检测控制模块连接 的并用于与所述架空子站通讯连接的天线通讯装置。
由于采用了上述的技术解决方案，本发明是对输电线路上现有的故障显示器的 一种改进， 即增加一个用于感应信号源设备发出的脉动电流信号的电磁感应装置， 并配套采用检测控制模块，利用该模块触发天线通讯装置以无线通讯方式向外输出 该故障的位置信息，从而实现了对故障线路的检测与定位。本发明减少了线路设备 种类和数量，避免了故障自动定位装置中检测设备的重新研发工作， 大大节省了成 本。 附图说明
图 1是本发明一种用于输电线路接地故障自动定位装置的故障显示器的结 构示意图；
图 2是本发明一种用于输电线路接地故障自动定位装置的故障显示器的安 装示意图。 具体实施方式
下面结合附图， 对本发明的具体实施例进行详细说明。
请参阅图 1、 图 2, 输电线路 6连接在变电站主变压器 5出线侧， 每条输电线 路 6由三相总线构成，且每条输电线路 6上设有若干个节点。输电线路接地故障自 动定位装置包括一连接在主变压器 5母线侧的信号源设备 1、若干个分别挂接在每 条输电线路 6的每个节点处的每相总线上的故障显示器 2、若干个分别设置在每条 输电线路 6的每个节点处的架空子站 3和一信息处理中心系统 4, 其中， 信号源设 备 1用于向主变压器 5母线侧反馈一脉动电流信号，
本发明， 即一种用于输电线路接地故障自动定位装置的故障显示器 2, 它 包括一用于接收脉动电流信号的电磁感应装置 21、一与电磁感应装置 21连接的检 测控制模块 22和一与检测控制模块 22连接的并用于与架空子站 3无线通讯连接天 线通讯装置 23。
本发明的工作原理如下：
当输电线路 6 出现一个单相接地故障时， 主变压器 5母线中性点 50会出 现偏移电压， 此时， 信号源设备 1会向主变压器 5母线侧反馈一脉动电流信号。 虽然这种脉动电流信号会经由主变压器 5传递至输电线路 6的每相总线， 但是 由于回路只会在输电线路 6的接地故障点和大地之间形成， 因此， 只有挂接在 发生接地故障的单相输电线路 6 上的故障显示器 2 才能检测到该脉动电流信 号， 而挂接在其它未出现接地故障的单相输电线路 6上的故障显示器 2因为没 有形成回路， 因此无法检测到该信号； 本发明的故障显示器 2根据这一工作原 理， 即可确定输电线路 6发生接地故障的单相总线， 而且由于每相总线上的各 个节点处均设有故障显示器 2 , 因此， 即可对单相总线的具体故障点进行准确 定位。 本发明的故障显示器 2利用电磁感应原理， 即电磁感应装置 21检测输 电线路 6上的脉动电流信号， 而并不跟线芯直接接触， 从而避免了因流过大电 流而发生损坏的现象； 检测控制模块 22接收到电磁感应装置 21输出的故障信 号后， 进行故障信息的处理， 并触发天线通讯装置 23 以无线通讯方式向外输 出该故障的位置信息， 并最终通过信息处理中心系统 4以短信形式发送至运行 人员的手机或监控设备 7 , 从而使运行人员能及时、 准确地掌握输电线路的安 全情况， 节省抢修时间， 提高工作效率。
本实施例中， 电磁感应装置 21采用的是美国微芯科技公司生产的 16F630 芯片， 检测控制模块 22采用的是光远科电 （北京） 科技有限公司生产的 16位 微处理芯片 , 天线通讯装置 23采用的是 TR24A型无线通讯模块。
以上结合附图实施例对本发明进行了详细说明， 本领域中普通技术人员可 根据上述说明对本发明做出种种变化例。 因而， 实施例中的某些细节不应构成 对本发明的限定， 本发明将以所附权利要求书界定的范围作为本发明的保护范 围。

Claims

1.一种用于输电线路接地故障自动定位装置的故障显示器， 所述输电线路 连接在变电站主变压器出线侧， 每条输电线路由三相总线构成， 且每条输电线 路上设有若干个节点， 所述定位装置包括一连接在所述主变压器母线侧的信号 源设备、 若干个分别挂接在所述每条输电线路的每个节点处的每相总线上的故 障显示器、 若干个分别设置在所述每条输电线路的每个节点处的架空子站和一 信息处理中心系统， 其中， 所述信号源设备向主变压器母线侧反馈一脉动电流 信号， 其特征在于， 所述故障显示器包括一用于接收所述脉动电流信号的电磁 感应装置、 一与该电磁感应装置连接的检测控制模块和一与该检测控制模块连 接的并用于与所述架空子站通讯连接的天线通讯装置。
PCT/CN2011/079167 2011-04-22 2011-08-31 一种用于输电线路接地故障自动定位装置的故障显示器 Ceased WO2012142808A1 (zh)

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CN105676064A (zh) * 2016-01-12 2016-06-15 国网浙江省电力公司嘉兴供电公司 一种用户侧漏电流监测方法及系统
CN106054026A (zh) * 2016-07-25 2016-10-26 常州市拓源电缆成套有限公司 电缆信号通道检测装置
CN119438796A (zh) * 2024-11-11 2025-02-14 南京信息工程大学 一种基于电磁感应原理的电力线路故障定位装置

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CN105261894A (zh) * 2015-10-28 2016-01-20 崔子扬 电缆连接装置及监控系统
CN105244837B (zh) * 2015-11-16 2017-08-08 国家电网公司 电缆连接装置及其监控系统

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CN105676064A (zh) * 2016-01-12 2016-06-15 国网浙江省电力公司嘉兴供电公司 一种用户侧漏电流监测方法及系统
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CN119438796A (zh) * 2024-11-11 2025-02-14 南京信息工程大学 一种基于电磁感应原理的电力线路故障定位装置

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