WO2015143885A1 - 电力电缆智能接地箱 - Google Patents

电力电缆智能接地箱 Download PDF

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Publication number
WO2015143885A1
WO2015143885A1 PCT/CN2014/092265 CN2014092265W WO2015143885A1 WO 2015143885 A1 WO2015143885 A1 WO 2015143885A1 CN 2014092265 W CN2014092265 W CN 2014092265W WO 2015143885 A1 WO2015143885 A1 WO 2015143885A1
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Prior art keywords
signal
module
current transformer
current
input end
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Ceased
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PCT/CN2014/092265
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English (en)
French (fr)
Inventor
朱辉
杜健
许箴
刘倩茜
汪浩
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CHANG ZHOU CURRENT SUPPLY Co OF JIANGSU ELECTRIC POWER Co
State Grid Jiangsu Electric Power Co Ltd
State Grid Corp of China SGCC
Original Assignee
CHANG ZHOU CURRENT SUPPLY Co OF JIANGSU ELECTRIC POWER Co
State Grid Jiangsu Electric Power Co Ltd
State Grid Corp of China SGCC
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Priority claimed from CN201420149915.4U external-priority patent/CN203786250U/zh
Priority claimed from CN201410124387.1A external-priority patent/CN103852694A/zh
Application filed by CHANG ZHOU CURRENT SUPPLY Co OF JIANGSU ELECTRIC POWER Co, State Grid Jiangsu Electric Power Co Ltd, State Grid Corp of China SGCC filed Critical CHANG ZHOU CURRENT SUPPLY Co OF JIANGSU ELECTRIC POWER Co
Publication of WO2015143885A1 publication Critical patent/WO2015143885A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote monitoring or remote control of equipment in a power distribution network
    • H02J13/12—Monitoring network conditions, e.g. electrical magnitudes or operational status
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote monitoring or remote control of equipment in a power distribution network
    • H02J13/13—Circuit arrangements for providing remote monitoring or remote control of equipment in a power distribution network characterised by the transmission of data to equipment in the power network
    • H02J13/1331—Circuit arrangements for providing remote monitoring or remote control of equipment in a power distribution network characterised by the transmission of data to equipment in the power network using wireless data transmission
    • H02J13/1333—Circuit arrangements for providing remote monitoring or remote control of equipment in a power distribution network characterised by the transmission of data to equipment in the power network using wireless data transmission by means of mobile telephony
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • 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
    • Y04S10/30—State monitoring, e.g. fault, temperature monitoring, insulator monitoring, corona discharge
    • 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
    • Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
    • Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
    • Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission

Definitions

  • the invention relates to the field of power cable operation safety monitoring, and particularly relates to a power cable intelligent grounding box.
  • the cable grounding box is usually used for protection.
  • Common cable grounding boxes mainly include cable sheathing direct grounding box, cable sheathing protection grounding box and cable cross-connection protection grounding box.
  • the inside of the cable sheathing direct grounding box contains copper bars, copper terminals, etc., which are used for direct grounding of the cable sheath. There is no need to install a cable sheath protector inside.
  • Cable sheath protection grounding box and cable sheath cross-connection protection The grounding box contains cable sheath protector, connecting copper bars, copper terminals, etc., for the protective grounding of the cable sheath.
  • the cable grounding box which hopes to change the shortcomings of the traditional grounding box to meet the needs of real-life monitoring, has been seen.
  • the Chinese patent document entitled "High-voltage cable intelligent grounding box” published by CN 102590670A discloses a The grounding box of the monitoring function must be monitored, but its structure is not specific enough; the current power cable grounding box is generally not able to effectively adapt to the online monitoring needs of the power cable in various environments.
  • the object of the present invention is to overcome the deficiencies of the prior art and provide a simple structure, low cost, convenient implementation, easy to popularize, and can effectively monitor the grounding state of the cable at the monitoring point when used, and can upload in time when an abnormality occurs.
  • Abnormal information which can effectively improve the effectiveness and reliability of power cable online monitoring, and secure the power cable intelligent grounding box.
  • the intelligent grounding box of the power cable of the present invention comprises a cable sheath cross-interconnection protection grounding box, and the above-mentioned cable sheathing cross-connection protection grounding box has a sealed box body, and three crosses are arranged in the box body.
  • the bridged copper row is set; its structural features are: also includes signal acquisition terminal, A-phase current transformer, B-phase current transformer, C-phase current transformer, antenna and current-carrying current transformer; Phase A current transformer, B The phase current transformer and the C-phase current transformer are respectively disposed on each of the three bridged copper bars of the cable sheath cross-connection protection grounding box;
  • the signal collecting terminal is fixedly disposed in the cable sheath cross-connection protection grounding box; the signal collecting terminal comprises an overcurrent protection module, a current sampling module, a temperature sensor, a humidity sensor, a signal processing module, a GPRS module and a power module;
  • the overcurrent protection module of the signal collection terminal is provided with a first sampling current signal input end, a second sampling current signal input end, a third sampling current signal input end and a signal output end; the current sampling mode is provided with a signal input end and a signal output end.
  • the temperature sensor and the humidity sensor respectively have a signal output end;
  • the signal processing module is provided with a current sampling signal input end, a temperature signal input end, a temperature signal input end and a signal output end;
  • the GPRS module is provided with a signal input end and a signal output end;
  • the first sampling current signal input end, the second sampling current signal input end and the third sampling current signal input end of the overcurrent protection module respectively correspond to the A phase current transformer, the B phase current transformer and the C phase current transformer respectively Signal electrical connection;
  • the signal input end of the current sampling module is electrically connected with the signal output end signal of the overcurrent protection module;
  • the current sampling signal input end of the signal processing module is electrically connected with the signal output end signal of the current sampling module;
  • the temperature of the signal processing module The signal input end is electrically connected with the signal output end signal of the temperature sensor;
  • the humidity signal input end of the signal processing module is electrically connected with the signal output end signal of the humidity sensor;
  • the signal input end of the GPRS module is electrically connected with the signal output end signal of the signal processing module.
  • the signal output end of the GPRS module is electrically connected with the antenna signal;
  • the power module is electrically connected with the energy-carrying current transformer;
  • the power module provides working power for other modules.
  • the above-mentioned cable sheath cross-connection protection grounding box box is a square box body, the box body includes an upper cover; the upper cover is provided with a through-hole through-hole; the lower end of the antenna and the current
  • the output wires of the transformer are cross-connected through the cable sheath to protect the grounding box of the grounding box from the line through the hole and then sealed.
  • a further solution is as follows:
  • the above-mentioned A-phase current transformer, B-phase current transformer and C-phase current transformer are LMZK1-10, 600/5, 0.5-level current transformers.
  • the above-mentioned energy-carrying current transformer is arranged on the busbar of the transmission line outside the box of the cable sheath cross-connection protection grounding box; the current-carrying current transformer is LXK- ⁇ 180, 800/1, 10W type Current Transformer.
  • FIG. 1 is a schematic structural view of the present invention, in which the front cover of the box body of the cable sheathing cross-connection protection grounding box is omitted;
  • FIG. 2 is a block diagram of the circuit structure of the signal acquisition terminal of FIG. 1, and the electrical connection relationship between the three-phase current transformer, the antenna and the current-carrying current transformer of FIG. 1 is also shown;
  • FIG. 3 is a schematic structural diagram of a system according to an application of the present invention.
  • Signal acquisition terminal 2 overcurrent protection module 21, current sampling module 22, temperature sensor 23, humidity sensor 24, signal processing module 25, GPRS module 26, power module 27,
  • the current transformer 7 is taken.
  • the intelligent grounding box of the power cable of the present embodiment is mainly composed of a cable sheath cross-interconnection protection grounding box 1, a signal collecting terminal 2, an A-phase current transformer 3, a B-phase current transformer 4, and a C phase.
  • the current transformer 5, the antenna 6 and the current-carrying current transformer 7 are composed.
  • the cable sheath cross-connection protection grounding box 1 is a prior art grounding box and will not be described here.
  • the cable sheath cross-connection protection grounding box 1 has a square sealed box body, the box body includes an upper cover, and the upper cover is provided with a through-hole through-hole; the box body is provided with three bridged copper bars 11 arranged at an intersection.
  • the signal collecting terminal 2 is fixedly disposed at the upper left portion of the cable sheath cross-connect protection grounding box 1.
  • the signal collecting terminal 2 is mainly composed of an overcurrent protection module 21, a current sampling module 22, a temperature sensor 23, a humidity sensor 24, a signal processing module 25, a GPRS module 26, and a power module 27.
  • the signal processing module 25 is mainly composed of an MCU of the MSP430 model.
  • the overcurrent protection module 21 of the signal collecting terminal 2 is provided with a first sampling current signal input end, a second sampling current signal input end, a third sampling current signal input end and a signal output end;
  • the current sampling mode 22 is provided with a signal input end and The signal output end;
  • the temperature sensor 23 and the humidity sensor 24 are respectively provided with signal output ends;
  • the signal processing module 25 is provided with a current sampling signal input end, a temperature signal input end, a temperature signal input end and a signal output end;
  • the GPRS module 26 is provided with a signal. Input and signal output.
  • the first sampling current signal input end, the second sampling current signal input end and the third sampling current signal input end of the overcurrent protection module 21 are respectively connected with the A phase current transformer 3, the B phase current transformer 4 and the C phase current transformer 5 corresponding to the signal electrical connection;
  • the signal input end of the current sampling module 22 is electrically connected to the signal output end signal of the overcurrent protection module 21;
  • the current sampling signal input end of the signal processing module 25 is electrically connected to the signal output end of the current sampling module 22
  • the temperature signal input end of the signal processing module 25 is electrically connected to the signal output end signal of the temperature sensor 23;
  • the humidity signal input end of the signal processing module 25 is electrically connected to the signal output end signal of the humidity sensor 24;
  • GPRS The signal input end of the module 26 is electrically connected to the signal output end signal of the signal processing module 25;
  • the signal output end of the GPRS module 26 is electrically connected to the antenna 6 signal; and
  • the power supply module 27 provides operating power for the other modules.
  • the power module 27 is
  • the A-phase current transformer 3, the B-phase current transformer 4, and the C-phase current transformer 5 are respectively disposed one on each of the three bridged copper bars 11 of the cable sheath cross-connection protection grounding box 1.
  • the A-phase current transformer 3, the B-phase current transformer 4, and the C-phase current transformer 5 are preferably LMZK1-10, 600/5, 0.5-type current transformers.
  • the antenna 6 is disposed on one side of the upper cover of the casing of the cable sheath cross-connection protection grounding box 1.
  • the current-carrying current transformer 7 is preferably a LXK- ⁇ 180, 800/1, 10W type current transformer in this embodiment.
  • the current-carrying current transformer 7 is disposed on the busbar of the transmission line outside the box of the cable sheath cross-connection protection grounding box 1; the output wire of the current-carrying current transformer 7 and the lower end of the antenna 6 are cross-connected through the cable sheathing protection
  • the line on the upper cover of the box of the grounding box 1 is introduced into the box through the hole, and the circuit is sealed through the hole.
  • the working principle and working process of the power cable intelligent grounding box of the present embodiment are as follows:
  • the energy-carrying current transformer 7 takes power from the cable bus, and the power module 27 of the signal collecting terminal 2 supplies the working power.
  • the advantage of this type of power supply compared to the power supply mode of the battery is that the power supply is convenient, and the management trouble of replacing the battery is eliminated.
  • the A-phase current transformer 3, the B-phase current transformer 4 and the C-phase current transformer 5 collect the current signal of the ABC three-phase grounding bus in real time, and the overcurrent protection module 21 of the signal collecting terminal 2 prevents overcurrent processing.
  • the signal After being sampled by the current sampling module 22, the signal is sent to the signal processing module 25 for processing; the temperature sensor 23 and the humidity sensor 24 respectively collect the real-time temperature and humidity information in the box and transmit it to the signal processing module 25 for processing; the single-chip microcomputer of the signal processing module 25 follows The setting program analyzes and processes the received signal, and wirelessly transmits the processed information to the power supply department background monitoring system via the GPS module 26 and the antenna 6 according to the set frequency.
  • the power cable intelligent grounding box of the present embodiment is convenient to implement, has low cost, and is easy to promote by adding a signal collecting terminal, an antenna, and an energy-carrying current transformer in the existing cable sheath cross-connection protection grounding box.
  • it can monitor the current information of the grounding busbar of the monitoring point and the temperature and humidity information of the box in real time.
  • the running state of the monitoring point is abrupt, it significantly increases the frequency of information sent to the background monitoring system of the power supply department. After the staff of the background monitoring system of the power supply department finds the abnormal information of the monitoring point, it can conveniently and quickly make corresponding and timely processing, thereby effectively improving the effectiveness and accuracy of the online monitoring of the cable and ensuring the safety of the power supply network.
  • the invention has positive effects: (1)
  • the power cable intelligent grounding box of the invention realizes convenience by adding a signal collecting terminal, adding an antenna and absorbing a current transformer in the existing cable sheath cross-connection protection grounding box, Low cost and easy to promote.
  • the intelligent grounding box of the power cable of the invention can monitor the current information of the grounding busbar of the monitoring point and the temperature and humidity information of the box in real time when used, and when the operating state of the monitoring point is abrupt, it increases significantly.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)

Abstract

一种电力电缆智能接地箱，包括电缆护层交叉互联保护接地箱、安装于接地箱内的信号采集终端（2）、A、B、C三相线上各一只电流互感器（3，4，5）、天线（6）和用于供电的取能电流互感器（7）；信号采集终端（2）包括过流保护模块（21）、电流采样模块（22）、温度传感器（23）、湿度传感器（24）、信号处理模块（25）、GPRS模块（26）和电源模块（27）；信号采集终端（2）接收由3只电流互感器（3，4，5）经过流保护模块（21）和电流采样模块（22）处理后的电流采样信息及温度传感器（23）和湿度传感器（24）传输的温湿度信息进行处理，并将相关信息无线发送给供电部门后台监控系统。该电力电缆智能接地箱实现方便，成本较低，易于推广，使用时能够有效提高电缆在线监测的有效性和准确性，保证供电电网的安全。

Description

电力电缆智能接地箱 技术领域
本发明涉及电力电缆运行安全监测领域，具体涉及一种电力电缆智能接地箱。
背景技术
随着城市现代化水平的不断提高，电力电缆作为城市电网中的重要设备，发展速度极快，而且城市电力电缆通常采用入地的布设方法。城市电缆在实际运行中发生故障的原因之一为电力电缆的接地系统故障，其占到电缆故障的21％，电力电缆的外护套在使用过程中容易因外力损伤、化学腐蚀、雷电过电压或系统过电压的等原因，导致护套绝缘破损造成一点或多点接地，从而破坏高压电缆金属护套的接地系统，引起电缆金属护套感应电动势的失衡，导致金属护套与大地形成较大的环流，附加线损增加、电缆温度增高；长期如此还会危及主绝缘、缩短电缆线路的正常运行寿命，影响线路的安全运行。
为防止上述现象的发生，通常采用电缆接地箱进行保护。常见的电缆接地箱主要有电缆护层直接接地箱、电缆护层保护接地箱和电缆交叉互联保护接地箱。电缆护层直接接地箱的内部含有连接铜排、铜端子等，用于电缆护层的直接接地，内部无需安装电缆护层保护器。电缆护层保护接地箱和电缆护层交叉互联保护接地箱内含有电缆护层保护器、连接铜排、铜端子等，用于电缆护层的保护接地。当前，希望改变传统接地箱的缺点以适应现实监测需要的电缆接地箱已有所见，如公布号为CN 102590670A、名称为“高压电缆智能接地箱”的中国专利文献，即公开了一种具有一定监测功能的接地箱，但其结构不够具体；目前的电力电缆接地箱，普遍还不能有效适应电力电缆在各种环境下的在线监测需要。
发明内容
本发明的目的是：克服现有技术的不足，提供一种结构简单、成本较低、实现方便、易于推广、使用时能够对监测点的电缆接地状态进行有效监测且在出现异常时能及时上传异常信息，从而可有效提高电力电缆在线监测的有效性和可靠性、保障供电安全的电力电缆智能接地箱。
本发明的技术方案是：本发明的电力电缆智能接地箱，包括电缆护层交叉互联保护接地箱，上述的电缆护层交叉互联保护接地箱具有密封的箱体，箱体内设有3根交叉设置的桥接铜排；其结构特点是：还包括信号采集终端、A相电流互感器、B相电流互感器、C相电流互感器、天线和取能电流互感器；A相电流互感器、B相电流互感器和C相电流互感器在电缆护层交叉互联保护接地箱的3根交桥接铜排上分别各设置1只；
上述的信号采集终端固定设置在电缆护层交叉互联保护接地箱内；信号采集终端包括过流保护模块、电流采样模块、温度传感器、湿度传感器、信号处理模块、GPRS模块和电源模块；
信号采集终端的过流保护模块设有第一采样电流信号输入端、第二采样电流信号输入端、第三采样电流信号输入端和信号输出端；电流采样模设有信号输入端和信号输出端；温度传感器和湿度传感器分别设有信号输出端；信号处理模块设有电流采样信号输入端、温度信号输入端、温度信号输入端和信号输出端；GPRS模块设有信号输入端和信号输出端；
上述的过流保护模块的第一采样电流信号输入端、第二采样电流信号输入端和第三采样电流信号输入端分别与A相电流互感器、B相电流互感器和C相电流互感器对应信号电连接；电流采样模块的信号输入端与过流保护模块的信号输出端信号电连接；信号处理模块的电流采样信号输入端与电流采样模块的信号输出端信号电连接；信号处理模块的温度信号输入端与温度传感器的信号输出端信号电连接；信号处理模块的湿度信号输入端与湿度传感器的信号输出端信号电连接；GPRS模块的信号输入端与信号处理模块的信号输出端信号电连接；GPRS模块的信号输出端与天线信号电连接；电源模块与取能电流互感器电连接；电源模块为其他各模块提供工作电源。
进一步的方案是：上述的电缆护层交叉互联保护接地箱的箱体为方形箱体，箱体包括上盖；上盖上设有上下贯通的线路通过孔；上述的天线的下端以及取能电流互感器的输出电线穿过电缆护层交叉互联保护接地箱的箱体上盖上的线路通过孔后密封。
进一步的方案是：：上述的A相电流互感器、B相电流互感器和C相电流互感器为LMZK1-10,600/5，0.5级型电流互感器。
进一步的方案还有：上述的取能电流互感器设置在电缆护层交叉互联保护接地箱的箱体外的输电线路的母线上；取能电流互感器为LXK-φ180,800/1，10W型电流互感器。
附图说明
图1为本发明的结构示意图，图中省略了电缆护层交叉互联保护接地箱的箱体的前盖未画出；
图2为图1中的信号采集终端的电路结构框图，图中还显示了其与图1中A、B、C三相电流互感器、天线以及取能电流互感器的电连接关系；
图3为本发明的一种应用的系统结构示意图。
上述附图中的附图标记如下：
电缆护层交叉互联保护接地箱1，桥接铜排11，
信号采集终端2，过流保护模块21，电流采样模块22，温度传感器23，湿度传感器24，信号处理模块25，GPRS模块26，电源模块27，
A相电流互感器3，
B相电流互感器4，
C相电流互感器5，
天线6，
取能电流互感器7。
具体实施方式
下面结合附图和具体实施方式对本发明作进一步详细的说明。
(实施例1)
见图1和图2，本实施例的电力电缆智能接地箱，主要由电缆护层交叉互联保护接地箱1、信号采集终端2、A相电流互感器3、B相电流互感器4、C相电流互感器5、天线6和取能电流互感器7组成。
电缆护层交叉互联保护接地箱1为现有技术的接地箱，在此不多叙述。电缆护层交叉互联保护接地箱1具有方形的密封箱体，箱体包括上盖，上盖上设有上下贯通的线路通过孔；箱体内设有3根交叉设置的桥接铜排11。
信号采集终端2固定设置在电缆护层交叉互联保护接地箱1内的左上部。信号采集终端2主要由过流保护模块21、电流采样模块22、温度传感器23、湿度传感器24、信号处理模块25、GPRS模块26和电源模块27组成。信号处理模块25主要由MSP430型号的MCU组成。
信号采集终端2的过流保护模块21设有第一采样电流信号输入端、第二采样电流信号输入端、第三采样电流信号输入端和信号输出端；电流采样模22设有信号输入端和信号输出端；温度传感器23和湿度传感器24分别设有信号输出端；信号处理模块25设有电流采样信号输入端、温度信号输入端、温度信号输入端和信号输出端；GPRS模块26设有信号输入端和信号输出端。
过流保护模块21的第一采样电流信号输入端、第二采样电流信号输入端和第三采样电流信号输入端分别与A相电流互感器3、B相电流互感器4和C相电流互感器5对应信号电连接；电流采样模块22的信号输入端与过流保护模块21的信号输出端信号电连接；信号处理模块25的电流采样信号输入端与电流采样模块22的信号输出端信号电连接；信号处理模块25的温度信号输入端与温度传感器23的信号输出端信号电连接；信号处理模块25的湿度信号输入端与湿度传感器24的信号输出端信号电连接；GPRS 模块26的信号输入端与信号处理模块25的信号输出端信号电连接；GPRS模块26的信号输出端与天线6信号电连接；电源模块27为其他各模块提供工作电源。电源模块27与取能电流互感器7电连接，电源模块27将取能电流互感器7提供的电能转换为稳定的直流电压输出。
A相电流互感器3、B相电流互感器4和C相电流互感器5在电缆护层交叉互联保护接地箱1的3根交桥接铜排11上分别各设置1只。本实施例中，A相电流互感器3、B相电流互感器4和C相电流互感器5均优选采用LMZK1-10,600/5，0.5级型电流互感器。
天线6设置在电缆护层交叉互联保护接地箱1的箱体上盖的一侧。
取能电流互感器7本实施例中优选采用LXK-φ180,800/1，10W型电流互感器。取能电流互感器7设置在电缆护层交叉互联保护接地箱1的箱体外的输电线路的母线上；取能电流互感器7的输出电线以及天线6的下端穿过电缆护层交叉互联保护接地箱1的箱体上盖上的线路通过孔后引入箱体内，再将电路通过孔密封。
参见图3，本实施例电力电缆智能接地箱，其工作原理和工作过程简述如下：
本实施例的电力电缆智能接地箱，其工作时，由取能电流互感器7从电缆母线上取得电能，通过信号采集终端2的电源模块27为其提供工作电源。这种供电的方式较之电池等供电方式的优势在于供电方便，省去了更换电池等管理上的麻烦。工作时，A相电流互感器3、B相电流互感器4和C相电流互感器5实时采集ABC三相的接地母线的电流信号，经信号采集终端2的过流保护模块21防过电流处理后再经电流采样模块22采样后传输给信号处理模块25处理；温度传感器23和湿度传感器24分别采集箱体内的实时温度和湿度信息并传输给信号处理模块25处理；信号处理模块25的单片机按照设定程序对所接收的信号进行分析处理，并将处理后的信息按照设定的频率经GPS模块26和天线6无线发送给供电部门后台监控系统。当某一台本实施例的电力电缆智能接地箱发现其监测点的运行状态发生突变时，其显著增大(一般为常态的5倍左右)发送给供电部门后台监控系统的信息频率，供电部门后台监控系统的工作人员发现该监测点的异常信息后，方便即时作出相应的处理。
综上，本实施例的电力电缆智能接地箱，通过在现有的电缆护层交叉互联保护接地箱内增设信号采集终端、增加天线和取能电流互感器，实现方便，成本较低，易于推广；其使用时能够实时监测所在的监测点的接地母线的电流信息及箱体内的温度和湿度信息，当监测点的运行状态发生突变时，其显著增大发送给供电部门后台监控系统的信息频率，供电部门后台监控系统的工作人员发现该监测点的异常信息后，可方便快捷地作出及时相应处理，从而能够有效提高电缆在线监测的有效性和准确性，保证供电电网的安全。
以上实施例是对本发明的具体实施方式的说明，而非对本发明的限制，有关技术领域的技术人员在不脱离本发明的精神和范围的情况下，还可以做出各种变换和变化而得到相对应的等同的技术方案，因此所有等同的技术方案均应该归入本发明的专利保护范围。
工业应用性
本发明具有积极的效果：(1)本发明的电力电缆智能接地箱，通过在现有的电缆护层交叉互联保护接地箱内增设信号采集终端、增加天线和取能电流互感器，实现方便，成本较低，易于推广。
(2)本发明的电力电缆智能接地箱，使用时能够实时监测所在的监测点的接地母线的电流信息及箱体内的温度和湿度信息，当监测点的运行状态发生突变时，其显著增大发送给供电部门后台监控系统的信息频率，供电部门后台监控系统的工作人员发现该监测点的异常信息后，可方便快捷地作出及时相应处理，从而能够有效提高电缆在线监测的有效性和准确性，保证供电电网的安全。

Claims (4)

  1. 一种电力电缆智能接地箱，包括电缆护层交叉互联保护接地箱(1)，所述的电缆护层交叉互联保护接地箱(1)具有密封的箱体，箱体内设有3根交叉设置的桥接铜排(11)；其特征在于：还包括信号采集终端(2)、A相电流互感器(3)、B相电流互感器(4)、C相电流互感器(5)、天线(6)和取能电流互感器(7)；A相电流互感器(3)、B相电流互感器(4)和C相电流互感器(5)在电缆护层交叉互联保护接地箱(1)的3根交桥接铜排(11)上分别各设置1只；
    所述的信号采集终端(2)固定设置在电缆护层交叉互联保护接地箱(1)内；信号采集终端(2)包括过流保护模块(21)、电流采样模块(22)、温度传感器(23)、湿度传感器(24)、信号处理模块(25)、GPRS模块(26)和电源模块(27)；
    信号采集终端(2)的过流保护模块(21)设有第一采样电流信号输入端、第二采样电流信号输入端、第三采样电流信号输入端和信号输出端；电流采样模块(22)设有信号输入端和信号输出端；温度传感器(23)和湿度传感器(24)分别设有信号输出端；信号处理模块(25)设有电流采样信号输入端、温度信号输入端、温度信号输入端和信号输出端；GPRS模块(26)设有信号输入端和信号输出端；
    所述的过流保护模块(21)的第一采样电流信号输入端、第二采样电流信号输入端和第三采样电流信号输入端分别与A相电流互感器(3)、B相电流互感器(4)和C相电流互感器(5)对应信号电连接；电流采样模块(22)的信号输入端与过流保护模块(21)的信号输出端信号电连接；信号处理模块(25)的电流采样信号输入端与电流采样模块(22)的信号输出端信号电连接；信号处理模块(25)的温度信号输入端与温度传感器(23)的信号输出端信号电连接；信号处理模块(25)的湿度信号输入端与湿度传感器(24)的信号输出端信号电连接；GPRS模块(26)的信号输入端与信号处理模块(25)的信号输出端信号电连接；GPRS模块(26)的信号输出端与天线(6)信号电连接；电源模块(27)与取能电流互感器(7)电连接；电源模块(27)为其他各模块提供工作电源。
  2. 根据权利要求1所述的电力电缆智能接地箱，其特征在于：所述的电缆护层交叉互联保护接地箱(1)的箱体为方形箱体，箱体包括上盖；上盖上设有上下贯通的线路通过孔；所述的天线(6)的下端以及取能电流互感器(7)的输出电线穿过电缆护层交叉互联保护接地箱(1)的箱体上盖上的线路通过孔后密封。
  3. 根据权利要求1所述的电力电缆智能接地箱，其特征在于：所述的A相电 流互感器(3)、B相电流互感器(4)和C相电流互感器(5)为LMZK1-10,600/5，0.5级型电流互感器。
  4. 根据权利要求1所述的电力电缆智能接地箱，其特征在于：所述的取能电流互感器(7)设置在电缆护层交叉互联保护接地箱(1)的箱体外的输电线路的母线上；取能电流互感器(7)为LXK-φ180,800/1，10W型电流互感器。
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CN115201715A (zh) * 2022-07-14 2022-10-18 国家电网有限公司 交叉互联高压电缆护层接地故障模式的识别方法及系统
CN115575849A (zh) * 2022-09-02 2023-01-06 国网山西省电力公司太原供电公司 一种电缆交叉互联接线检测方法及装置
CN115792328A (zh) * 2022-09-29 2023-03-14 江苏省电力试验研究院有限公司 基于同轴电缆测试电缆交叉互联接地系统环流方法与装置
CN115792328B (zh) * 2022-09-29 2024-01-19 江苏省电力试验研究院有限公司 基于同轴电缆测试电缆交叉互联接地系统环流方法与装置
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