WO2022121191A1 - Grounding cable antitheft protection system - Google Patents
Grounding cable antitheft protection system Download PDFInfo
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- WO2022121191A1 WO2022121191A1 PCT/CN2021/085531 CN2021085531W WO2022121191A1 WO 2022121191 A1 WO2022121191 A1 WO 2022121191A1 CN 2021085531 W CN2021085531 W CN 2021085531W WO 2022121191 A1 WO2022121191 A1 WO 2022121191A1
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- 238000012544 monitoring process Methods 0.000 claims abstract description 32
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/20—Measuring earth resistance; Measuring contact resistance, e.g. of earth connections, e.g. plates
- G01R27/205—Measuring contact resistance of connections, e.g. of earth connections
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- the invention belongs to the field of power supply and distribution equipment, and in particular relates to a ground wire anti-theft protection system.
- High-voltage cables are generally single-core cables, and their metal sheaths generally use cross-connected grounding or single-ended direct grounding.
- grounding system When the grounding system is intact, the induced voltage on the surface of the metal sheath is only tens of volts, but when an abnormality occurs in the grounding system, such as a stolen ground wire, the induced voltage on the surface of the metal sheath will rise to several hundred volts. If it is not found and dealt with in time, it will cause the outer sheath to burn through or the sheath protector to burn, and even lead to the breakdown of the main insulation of the cable in severe cases.
- the theft of cable grounding wires has occurred all over the country, and the theft continues after repairing.
- the grounding wire of the outdoor cable terminal is drawn from the outdoor tower, and the theft is particularly obvious. It has attracted the attention of relevant domestic departments and industries to the anti-theft cutting of grounding cables. Relying on manual inspections has problems such as heavy workload, high work intensity, and inability to achieve real-time monitoring.
- the anti-theft monitoring of the ground wire of the outdoor cable terminal mainly adopts the installation of video monitoring or vibration sensor monitoring. It will not be able to recover automatically, and there is still the possibility of high-voltage cable heating and burning and main insulation breakdown.
- the present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the present invention proposes a ground wire anti-theft protection system, which has a simple structure and solves the problems of poor monitoring effect and failure to provide protection when the main ground wire is stolen.
- the grounding resistance collecting device is used to collect the grounding resistance value of the main grounding wire;
- the bypass grounding protection device is connected in parallel with the main grounding wire and is used to A bypass grounding is provided for the power supply cable;
- the processor unit is connected to the grounding resistance collecting device, and is used for receiving the grounding resistance value.
- the grounding wire anti-theft protection system has at least the following technical effects: the grounding resistance value of the main grounding wire can be collected by the grounding resistance collecting device, and the grounding resistance value of the main grounding wire can directly and effectively reflect the main grounding wire. Compared with the traditional monitoring method by vibration sensor, the grounding state greatly improves the monitoring accuracy.
- the bypass grounding protection device can provide bypass protection for the main grounding wire. After the main grounding wire is stolen and disconnected, the bypass grounding can continue to be provided to prevent direct failure and gain time for rescue. Through the processor unit, the received information can be transmitted to the external monitoring platform or monitoring terminal. Once theft occurs, the danger can be found at the first time, and the maintenance personnel can be dispatched to solve it in time.
- the grounding resistance collecting device includes: an input signal collecting coil, connected to the processor unit, for collecting the grounding resistance value of the main grounding wire and transmitting it to the processor unit;
- the excitation voltage output coil is used for outputting the excitation voltage to the input signal acquisition coil.
- a signal amplification module, a filter module and a digital-to-analog conversion module are sequentially connected between the input signal acquisition coil and the processor unit.
- a signal isolator is connected between the digital-to-analog conversion module and the processor unit.
- the bypass grounding protection device includes: a secondary ground wire, one end of which is connected to ground; one end of a connecting copper bar, one end of which is connected to the other end of the secondary ground wire, and the other end is connected to the main Ground wire connection.
- the above-mentioned ground wire anti-theft protection system further includes an inductive CT self-power-fetching device, and the inductive CT self-power-fetching device is used to obtain electrical energy from the power supply cable by electromagnetic induction and supply the power to the power supply cable.
- Ground resistance acquisition device and processor unit are examples of the above-mentioned ground wire anti-theft protection system.
- the inductive CT self-power-fetching device includes: a transformer for sensing the electrical signal in the power supply cable and outputting power; a power module, connected to the transformer, for receiving all the power The electric energy output by the transformer is rectified, stabilized and filtered, and then supplied to the grounding resistance acquisition device and the processor unit.
- the above-mentioned ground wire anti-theft protection system further includes a wireless communication unit connected to the processor unit.
- the above-mentioned ground wire anti-theft protection system further includes a signal conversion unit disposed between the processor unit and the wireless communication unit, and the signal conversion unit is configured to convert the signal output by the processor unit Converted to a signal with stronger anti-interference ability.
- the above-mentioned ground wire anti-theft protection system further includes a monitoring platform connected to the processor unit for remote monitoring.
- FIG. 1 is a schematic structural diagram of an embodiment of the present invention.
- Grounding resistance acquisition device 100 input signal acquisition coil 110, excitation voltage output coil 120, signal amplification module 130, filter module 140, digital-to-analog conversion module 150, signal isolator 160,
- the ground wire anti-theft protection system includes a ground resistance acquisition device 100 , a bypass ground protection device 200 , and a processor unit 300 .
- the grounding resistance collecting device 100 is used to collect the grounding resistance value of the main grounding wire 400;
- the bypass grounding protection device 200 is connected in parallel with the main grounding wire 400 to provide bypass grounding for the power supply cable at the main grounding wire 400;
- the processor unit 300 connected to the grounding resistance collecting device 100, for receiving the grounding resistance value.
- the grounding resistance collecting device 100 collects the real-time change of the grounding resistance of the main grounding wire 400 , so as to realize real-time monitoring of the operating condition of the main grounding wire 400 .
- the main grounding wire 400 is in normal operation, the main grounding wire 400 is intact, the grounding resistance is small, and the resistance of the grounding wire is usually only a few ohms; when the main grounding wire 400 is abnormal, such as being stolen, the main grounding wire 400 is disconnected, so the grounding resistance will be becomes infinite, and at this time, the grounding resistance of the main connection wire collected by the grounding resistance collecting device 100 will also be abnormal.
- the abnormal information can be transmitted to the monitoring platform 800 through the processor unit 300, and the monitoring platform 800 will send out alarm information to remind the maintenance personnel that there is a dangerous situation.
- the bypass grounding protection device 200 is connected in parallel with the main ground wire 400 and forms a ground loop with the main ground wire 400 of the cable.
- the bypass grounding protection device 200 can be used to form grounding protection for the power supply cable to ensure the safe and stable operation of the power supply system, and allow relevant maintenance personnel to deal with the abnormality of the main grounding wire 400. Time to avoid major losses .
- the grounding resistance value of the main grounding wire 400 can be collected by the grounding resistance collecting device 100, and the grounding resistance value of the main grounding wire 400 can directly and effectively reflect the grounding state of the main grounding wire 400 Compared with the traditional monitoring method by vibration sensor, the monitoring accuracy is greatly improved.
- the bypass grounding protection device 200 can provide bypass protection for the main grounding wire 400. After the main grounding wire 400 is stolen and disconnected, the bypass grounding can continue to be provided to prevent direct failure and gain time for rescue.
- the received information can be transmitted to the external monitoring platform 800 or the monitoring terminal through the processor unit 300. Once theft occurs, the dangerous situation can be discovered at the first time, and maintenance personnel can be dispatched to solve it in time.
- the grounding resistance acquisition device 100 includes: an input signal acquisition coil 110 and an excitation voltage output coil 120 .
- the input signal collecting coil 110 is connected to the processor unit 300 for collecting the grounding resistance value of the main ground wire 400 and transmitting to the processor unit 300 ;
- the excitation voltage output coil 120 is used for outputting the excitation voltage to the input signal collecting coil 110 .
- the excitation voltage output coil 120 steps down the 12V DC voltage of the system power supply to 1V through a step-down circuit, and outputs it to the input signal acquisition coil 110 after filtering and voltage stabilization, so that the input signal acquisition coil 110 can accurately collect the main ground wire 400 ground resistance value.
- the principle of collecting resistance by the grounding resistance collecting device 100 may refer to the principle of measuring resistance by a digital micro-ohmmeter.
- a signal amplification module 130 , a filtering module 140 and a digital-to-analog conversion module 150 are sequentially connected between the input signal acquisition coil 110 and the processor unit 300 .
- the quality of the signal directly collected by the input signal collection coil 110 is usually poor. In this case, it needs to be preprocessed by the signal amplification module 130 and the filter module 140, and then converted into a digital signal by the digital-to-analog conversion module 150 and then input to the processor unit. 300.
- a signal isolator 160 is connected between the digital-to-analog conversion module 150 and the processor unit 300 .
- the signal output by the digital-to-analog conversion module 150 will not be directly input to the processor unit 300 , and will be isolated by the signal isolator 160 .
- the bypass grounding protection device 200 includes: a secondary ground wire 210 and a connecting copper bar 220 .
- One end of the auxiliary ground wire 210 is connected to the ground; one end of the connection copper bar 220 is connected to the other end of the auxiliary ground wire 210 , and the other end is connected to the main ground wire 400 .
- the bypass of the main ground wire 400 can be completed by the secondary ground wire 210 and the connecting copper bar 220 .
- the above-mentioned ground wire anti-theft protection system further includes an inductive CT self-power extraction device 500, and the inductive CT self-extraction device 500 is used to obtain electric energy from the power supply cable through electromagnetic induction and supply it to the grounding resistance for acquisition.
- Apparatus 100 and processor unit 300 After using the inductive CT self-power extraction device 500, the ground wire anti-theft protection system of the embodiment of the present invention can be freed from the constraints of the external power supply. There are more options for the placement of the protection system.
- the inductive CT self-power extraction device 500 includes: a transformer and a power module.
- the transformer is used to sense the electrical signal in the power supply cable and output electric energy;
- the power module is connected to the transformer and used to receive the electric energy output by the transformer, rectify, stabilize, filter and then supply the grounding resistance acquisition device 100 and the processor unit 300.
- the transformer can directly sense the electrical signal in the power supply cable, and then generate electric energy.
- the generated electric energy is transmitted to the power supply module, and the power supply is supplied after rectification, filtering, voltage regulation and other operations through the power supply module.
- the excitation voltage output by the excitation voltage output coil 120 can be powered from the power supply module.
- the above-mentioned ground wire anti-theft protection system further includes a wireless communication unit 600 connected to the processor unit 300 .
- the processor unit 300 can transmit the collected grounding resistance data to the remote monitoring platform 800 through the wireless communication unit 600 .
- the wireless communication unit 600 may adopt Bluetooth, ZigBee, network module or GPRS module, etc.
- the above-mentioned ground wire anti-theft protection system further includes a signal conversion unit 700 disposed between the processor unit 300 and the wireless communication unit 600 , and the signal conversion unit 700 is configured to convert the signal output by the processor unit 300 Converted to a signal with stronger anti-interference ability.
- the signal conversion unit 700 can be used to convert the signal output by the processor unit 300, for example, by converting the TTL level signal into a 485 signal, the anti-interference ability can be improved.
- the above-mentioned ground wire anti-theft protection system further includes a monitoring platform 800 connected to the processor unit 300 for remote monitoring.
- the monitoring platform 800 may directly use a computer as a monitoring device, or may use a mobile device such as a tablet computer or a mobile phone as a monitoring terminal.
- monitoring platform 800 By setting the monitoring platform 800, monitoring can be implemented when grounding resistance collection needs to be performed on multiple locations, thereby facilitating reasonable scheduling of maintenance personnel.
- the processor unit 300 adopts a single chip microcomputer or a DSP.
- a single-chip microcomputer may be used as the processor unit 300, and the single-chip microcomputer of the STM32 series may be selected but not limited to.
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Abstract
A grounding cable antitheft protection system, comprising a grounding resistance collecting device, used for collecting a grounding resistance of a main grounding cable; a bypass grounding protection device, connected in parallel to the main grounding cable and used for providing bypass grounding on the main grounding cable for a power supply cable; and a processor unit, connected to the grounding resistance collecting device and used for receiving the grounding resistance. With the embodiments of the invention, the grounding resistance of the main grounding cable is collected via the grounding resistance collecting device, thus greatly increasing the accuracy of monitoring compared with a conventional scheme of monitoring via a vibration sensor. The main grounding cable is provided with bypass protection by the bypass grounding protection device, when the main grounding cable is disconnected due to theft, bypass grounding can still be provided, thus averting an immediate failure, and buying time for a repair. Received information is transmitted to an external monitoring platform or monitoring end via the processor unit, once a theft occurs, the dangerous situation can be noticed immediately, and a maintenance staff member can be dispatched in a timely manner to resolve the situation.
Description
本发明属于供配电设备领域，具体涉及一种接地线防盗保护***。The invention belongs to the field of power supply and distribution equipment, and in particular relates to a ground wire anti-theft protection system.
高压电缆一般为单芯电缆，其金属护层一般采用交叉互联接地或单端直接接地的运行方式。在接地***完好的情况下金属护层表面的感应电压只有几十伏，但当接地***出现异常如接地线被盗时，金属护层表面的感应电压将会上升至几百伏。如果不及时发现并进行处理，将会导致外护套烧穿或护层保护器烧毁，严重情况下甚至会引发电缆主绝缘击穿事故。High-voltage cables are generally single-core cables, and their metal sheaths generally use cross-connected grounding or single-ended direct grounding. When the grounding system is intact, the induced voltage on the surface of the metal sheath is only tens of volts, but when an abnormality occurs in the grounding system, such as a stolen ground wire, the induced voltage on the surface of the metal sheath will rise to several hundred volts. If it is not found and dealt with in time, it will cause the outer sheath to burn through or the sheath protector to burn, and even lead to the breakdown of the main insulation of the cable in severe cases.
近年来全国各地均发生了电缆接地线被盗的情况，且存在补装后继续被盗的情况，其中户外电缆终端接地线由于从户外杆塔上引出，被盗情况尤为明显。引起了国内相关部门和行业对接地电缆防盗割的重视。依靠人工进行巡视检查存在工作量大，工作强度高，无法实现实时监控等难题。目前对户外电缆终端接地线防盗监控主要采用安装视频监控或震动传感器监测等方式，但存在视频监控供电功率大、耗电量高，震动传感器误报等弊端，且发生接地线遭盗割的情况将无法自动进行恢复，仍存在高压电缆发热燃烧与主绝缘击穿的可能。In recent years, the theft of cable grounding wires has occurred all over the country, and the theft continues after repairing. Among them, the grounding wire of the outdoor cable terminal is drawn from the outdoor tower, and the theft is particularly obvious. It has attracted the attention of relevant domestic departments and industries to the anti-theft cutting of grounding cables. Relying on manual inspections has problems such as heavy workload, high work intensity, and inability to achieve real-time monitoring. At present, the anti-theft monitoring of the ground wire of the outdoor cable terminal mainly adopts the installation of video monitoring or vibration sensor monitoring. It will not be able to recover automatically, and there is still the possibility of high-voltage cable heating and burning and main insulation breakdown.
发明内容SUMMARY OF THE INVENTION
本发明旨在至少解决现有技术中存在的技术问题之一。为此， 本发明提出一种接地线防盗保护***，所述接地线防盗保护***的结构简单，解决了监控效果不佳和主接地线遭盗割时无法提供保护的问题。The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the present invention proposes a ground wire anti-theft protection system, which has a simple structure and solves the problems of poor monitoring effect and failure to provide protection when the main ground wire is stolen.
根据本发明实施例的接地线防盗保护***，接地电阻采集装置，用于采集主接地线的接地阻值；旁路接地保护装置，与所述主接地线并联，用于在所述主接地线为供电电缆提供旁路接地；处理器单元，与所述接地电阻采集装置连接，用于接收所述接地阻值。According to the ground wire anti-theft protection system according to the embodiment of the present invention, the grounding resistance collecting device is used to collect the grounding resistance value of the main grounding wire; the bypass grounding protection device is connected in parallel with the main grounding wire and is used to A bypass grounding is provided for the power supply cable; the processor unit is connected to the grounding resistance collecting device, and is used for receiving the grounding resistance value.
根据本发明实施例的接地线防盗保护***，至少具有如下技术效果：通过接地电阻采集装置可以采集主接地线的接地阻值，而主接地线的接地阻值可以直接有效的反应主接地线的接地状态，相对于传统的通过震动传感器监测的方式，极大的提高了监测的准确性。通过旁路接地保护装置可以为主接地线提供旁路保护，在主接地线被盗割断开以后，可以继续提供旁路接地，防止直接出现故障，为救援争取了时间。通过处理器单元可以将接收的信息传输到外部的监测平台或监测端，一旦出现盗割，可以第一时间发现险情，及时调派维护人员解决。The grounding wire anti-theft protection system according to the embodiment of the present invention has at least the following technical effects: the grounding resistance value of the main grounding wire can be collected by the grounding resistance collecting device, and the grounding resistance value of the main grounding wire can directly and effectively reflect the main grounding wire. Compared with the traditional monitoring method by vibration sensor, the grounding state greatly improves the monitoring accuracy. The bypass grounding protection device can provide bypass protection for the main grounding wire. After the main grounding wire is stolen and disconnected, the bypass grounding can continue to be provided to prevent direct failure and gain time for rescue. Through the processor unit, the received information can be transmitted to the external monitoring platform or monitoring terminal. Once theft occurs, the danger can be found at the first time, and the maintenance personnel can be dispatched to solve it in time.
根据本发明的一些实施例，所述接地电阻采集装置包括：输入信号采集线圈，与所述处理器单元连接，用于采集所述主接地线的接地阻值并传输至所述处理器单元；激励电压输出线圈，用于输出激励电压至所述输入信号采集线圈。According to some embodiments of the present invention, the grounding resistance collecting device includes: an input signal collecting coil, connected to the processor unit, for collecting the grounding resistance value of the main grounding wire and transmitting it to the processor unit; The excitation voltage output coil is used for outputting the excitation voltage to the input signal acquisition coil.
根据本发明的一些实施例，所述输入信号采集线圈与所述处理器单元之间依次连接有信号放大模块、滤波模块和数模转换模块。According to some embodiments of the present invention, a signal amplification module, a filter module and a digital-to-analog conversion module are sequentially connected between the input signal acquisition coil and the processor unit.
根据本发明的一些实施例，所述数模转换模块与所述处理器单 元之间连接有信号隔离器。According to some embodiments of the present invention, a signal isolator is connected between the digital-to-analog conversion module and the processor unit.
根据本发明的一些实施例，所述旁路接地保护装置包括：副接地线，其一端与地连接；连接铜排，其一端与所述副接地线的另一端连接，另一端与所述主接地线连接。According to some embodiments of the present invention, the bypass grounding protection device includes: a secondary ground wire, one end of which is connected to ground; one end of a connecting copper bar, one end of which is connected to the other end of the secondary ground wire, and the other end is connected to the main Ground wire connection.
根据本发明的一些实施例，上述接地线防盗保护***还包括感应CT自取电装置，所述感应CT自取电装置用于通过电磁感应的方式从所述供电电缆上获取电能并供给所述接地电阻采集装置和处理器单元。According to some embodiments of the present invention, the above-mentioned ground wire anti-theft protection system further includes an inductive CT self-power-fetching device, and the inductive CT self-power-fetching device is used to obtain electrical energy from the power supply cable by electromagnetic induction and supply the power to the power supply cable. Ground resistance acquisition device and processor unit.
根据本发明的一些实施例，所述感应CT自取电装置包括：互感器，用于感应所述供电电缆中的电信号并输出电能；电源模块，与所述互感器连接，用于接收所述互感器输出的电能并进行整流、稳压、滤波后供给所述接地电阻采集装置和处理器单元。According to some embodiments of the present invention, the inductive CT self-power-fetching device includes: a transformer for sensing the electrical signal in the power supply cable and outputting power; a power module, connected to the transformer, for receiving all the power The electric energy output by the transformer is rectified, stabilized and filtered, and then supplied to the grounding resistance acquisition device and the processor unit.
根据本发明的一些实施例，上述接地线防盗保护***还包括与所述处理器单元连接的无线通信单元。According to some embodiments of the present invention, the above-mentioned ground wire anti-theft protection system further includes a wireless communication unit connected to the processor unit.
根据本发明的一些实施例，上述接地线防盗保护***还包括设置在所述处理器单元与无线通信单元之间的信号转换单元，所述信号转换单元用于将所述处理器单元输出的信号转换为抗干扰能力更强的信号。According to some embodiments of the present invention, the above-mentioned ground wire anti-theft protection system further includes a signal conversion unit disposed between the processor unit and the wireless communication unit, and the signal conversion unit is configured to convert the signal output by the processor unit Converted to a signal with stronger anti-interference ability.
根据本发明的一些实施例，上述接地线防盗保护***还包括监测平台，与所述处理器单元连接，用于进行远端监测。According to some embodiments of the present invention, the above-mentioned ground wire anti-theft protection system further includes a monitoring platform connected to the processor unit for remote monitoring.
本发明的附加方面和优点将在下面的描述中部分给出，部分将从下面的描述中变得明显，或通过本发明的实践了解到。Additional aspects and advantages of the present invention will be set forth, in part, from the following description, and in part will be apparent from the following description, or may be learned by practice of the invention.
本发明的上述和/或附加的方面和优点从结合下面附图对实施例的描述中将变得明显和容易理解，其中：The above and/or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of embodiments taken in conjunction with the accompanying drawings, wherein:
图1是本发明实施例的结构示意图。FIG. 1 is a schematic structural diagram of an embodiment of the present invention.
附图标记：Reference number:
接地电阻采集装置100、输入信号采集线圈110、激励电压输出线圈120、信号放大模块130、滤波模块140、数模转换模块150、信号隔离器160、Grounding resistance acquisition device 100, input signal acquisition coil 110, excitation voltage output coil 120, signal amplification module 130, filter module 140, digital-to-analog conversion module 150, signal isolator 160,
旁路接地保护装置200、副接地线210、连接铜排220、Bypass grounding protection device 200, secondary grounding wire 210, connecting copper bar 220,
处理器单元300、 processor unit 300,
主接地线400、 Main ground wire 400,
感应CT自取电装置500、Induction CT self-extraction device 500,
无线通信单元600、 wireless communication unit 600,
信号转换单元700、 Signal conversion unit 700,
监测平台800。 Monitoring platform 800 .
下面详细描述本发明的实施例，所述实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，仅用于解释本发明，而不能理解为对本发明的限制。The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, only used to explain the present invention, and should not be construed as a limitation of the present invention.
在本发明的描述中，如果有描述到第一、第二、第三、第四等等只是用于区分技术特征为目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量或者隐含指明所指示的技术特征的先后关系。In the description of the present invention, if there is a description of the first, second, third, fourth, etc., only for the purpose of distinguishing technical features, and should not be understood as indicating or implying relative importance or implicitly indicating the indicated The number of technical features or implicitly indicates the order of the indicated technical features.
本发明的描述中，除非另有明确的限定，设置、连接等词语应做广义理解，所属技术领域技术人员可以结合技术方案的具体内容合理确定上述词语在本发明中的具体含义。In the description of the present invention, unless otherwise clearly defined, words such as setting and connection should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meaning of the above words in the present invention in combination with the specific content of the technical solution.
下面参考图1描述根据本发明实施例的接地线防盗保护***。The following describes a ground wire anti-theft protection system according to an embodiment of the present invention with reference to FIG. 1 .
根据本发明实施例的接地线防盗保护***，包括接地电阻采集装置100、旁路接地保护装置200、处理器单元300。接地电阻采集装置100，用于采集主接地线400的接地阻值；旁路接地保护装置200，与主接地线400并联，用于在主接地线400为供电电缆提供旁路接地；处理器单元300，与接地电阻采集装置100连接，用于接收接地阻值。The ground wire anti-theft protection system according to the embodiment of the present invention includes a ground resistance acquisition device 100 , a bypass ground protection device 200 , and a processor unit 300 . The grounding resistance collecting device 100 is used to collect the grounding resistance value of the main grounding wire 400; the bypass grounding protection device 200 is connected in parallel with the main grounding wire 400 to provide bypass grounding for the power supply cable at the main grounding wire 400; the processor unit 300, connected to the grounding resistance collecting device 100, for receiving the grounding resistance value.
参考图1，接地电阻采集装置100采集主接地线400的接地电阻的实时变化情况，从而实现对主接地线400的运行状况进行实时监测。当主接地线400正常运行时，主接地线400完好、接地电阻较小，接地线阻值通常只有几欧姆；当主接地线400出现异常如被盗时，主接地线400断开，因此接地电阻会变为无穷大，此时接地电阻采集装置100采集到的主接电线的接地电阻的同样会异常。然后，通过处理器单元300将该异常信息传输到监测平台800即可，监测平台800会发出报警信息提醒维护人员有险情出现。Referring to FIG. 1 , the grounding resistance collecting device 100 collects the real-time change of the grounding resistance of the main grounding wire 400 , so as to realize real-time monitoring of the operating condition of the main grounding wire 400 . When the main grounding wire 400 is in normal operation, the main grounding wire 400 is intact, the grounding resistance is small, and the resistance of the grounding wire is usually only a few ohms; when the main grounding wire 400 is abnormal, such as being stolen, the main grounding wire 400 is disconnected, so the grounding resistance will be becomes infinite, and at this time, the grounding resistance of the main connection wire collected by the grounding resistance collecting device 100 will also be abnormal. Then, the abnormal information can be transmitted to the monitoring platform 800 through the processor unit 300, and the monitoring platform 800 will send out alarm information to remind the maintenance personnel that there is a dangerous situation.
参考图1，旁路接地保护装置200会与主接地线400并联，并与电缆主接地线400形成接地回路。当主接地线400异常时，可通过旁路接地保护装置200对供电电缆形成接地保护，确保供电***安全稳定的运行，并给予相关维护人员对主接地线400异常情况的处理时间，避免出现重大损失。Referring to FIG. 1 , the bypass grounding protection device 200 is connected in parallel with the main ground wire 400 and forms a ground loop with the main ground wire 400 of the cable. When the main grounding wire 400 is abnormal, the bypass grounding protection device 200 can be used to form grounding protection for the power supply cable to ensure the safe and stable operation of the power supply system, and allow relevant maintenance personnel to deal with the abnormality of the main grounding wire 400. Time to avoid major losses .
根据本发明实施例的接地线防盗保护***，通过接地电阻采集装置100可以采集主接地线400的接地阻值，而主接地线400的接地阻值可以直接有效的反应主接地线400的接地状态，相对于传统的通过震动传感器监测的方式，极大的提高了监测的准确性。通过旁路接地保护装置200可以为主接地线400提供旁路保护，在主接地线400被盗割断开以后，可以继续提供旁路接地，防止直接出现故障，为救援争取了时间。通过处理器单元300可以将接收的信息传输到外部的监测平台800或监测端，一旦出现盗割，可以第一时间发现险情，及时调派维护人员解决。According to the grounding wire anti-theft protection system of the embodiment of the present invention, the grounding resistance value of the main grounding wire 400 can be collected by the grounding resistance collecting device 100, and the grounding resistance value of the main grounding wire 400 can directly and effectively reflect the grounding state of the main grounding wire 400 Compared with the traditional monitoring method by vibration sensor, the monitoring accuracy is greatly improved. The bypass grounding protection device 200 can provide bypass protection for the main grounding wire 400. After the main grounding wire 400 is stolen and disconnected, the bypass grounding can continue to be provided to prevent direct failure and gain time for rescue. The received information can be transmitted to the external monitoring platform 800 or the monitoring terminal through the processor unit 300. Once theft occurs, the dangerous situation can be discovered at the first time, and maintenance personnel can be dispatched to solve it in time.
在本发明的一些实施例中，接地电阻采集装置100包括：输入信号采集线圈110、激励电压输出线圈120。输入信号采集线圈110，与处理器单元300连接，用于采集主接地线400的接地阻值并传输至处理器单元300；激励电压输出线圈120，用于输出激励电压至输入信号采集线圈110。激励电压输出线圈120通过降压电路将***电源的12V直流电压电降压到1V，并通过滤波和稳压之后输出到输入信号采集线圈110，让输入信号采集线圈110能够准确采集主接地线400的接地电阻值。接地电阻采集装置100采集电阻的原理可以参考数字微欧计测量电阻的原理。In some embodiments of the present invention, the grounding resistance acquisition device 100 includes: an input signal acquisition coil 110 and an excitation voltage output coil 120 . The input signal collecting coil 110 is connected to the processor unit 300 for collecting the grounding resistance value of the main ground wire 400 and transmitting to the processor unit 300 ; the excitation voltage output coil 120 is used for outputting the excitation voltage to the input signal collecting coil 110 . The excitation voltage output coil 120 steps down the 12V DC voltage of the system power supply to 1V through a step-down circuit, and outputs it to the input signal acquisition coil 110 after filtering and voltage stabilization, so that the input signal acquisition coil 110 can accurately collect the main ground wire 400 ground resistance value. The principle of collecting resistance by the grounding resistance collecting device 100 may refer to the principle of measuring resistance by a digital micro-ohmmeter.
在本发明的一些实施例中，输入信号采集线圈110与处理器单元300之间依次连接有信号放大模块130、滤波模块140和数模转换模块150。输入信号采集线圈110直接采集的信号的质量通常会较差，此时需要通过信号放大模块130、滤波模块140进行预处理，然后通过数模转换模块150转换为数字信号之后再输入到处理器单元300。In some embodiments of the present invention, a signal amplification module 130 , a filtering module 140 and a digital-to-analog conversion module 150 are sequentially connected between the input signal acquisition coil 110 and the processor unit 300 . The quality of the signal directly collected by the input signal collection coil 110 is usually poor. In this case, it needs to be preprocessed by the signal amplification module 130 and the filter module 140, and then converted into a digital signal by the digital-to-analog conversion module 150 and then input to the processor unit. 300.
在本发明的一些实施例中，数模转换模块150与处理器单元300之间连接有信号隔离器160。为了保证处理器单元300的安全，数模转换模块150输出的信号不会直接输入到处理器单元300，会通过信号隔离器160进行信号隔离。In some embodiments of the present invention, a signal isolator 160 is connected between the digital-to-analog conversion module 150 and the processor unit 300 . In order to ensure the safety of the processor unit 300 , the signal output by the digital-to-analog conversion module 150 will not be directly input to the processor unit 300 , and will be isolated by the signal isolator 160 .
在本发明的一些实施例中，旁路接地保护装置200包括：副接地线210、连接铜排220。副接地线210，其一端与地连接；连接铜排220，其一端与副接地线210的另一端连接，另一端与主接地线400连接。通过副接地线210和连接铜排220可以完成主接地线400的旁通。In some embodiments of the present invention, the bypass grounding protection device 200 includes: a secondary ground wire 210 and a connecting copper bar 220 . One end of the auxiliary ground wire 210 is connected to the ground; one end of the connection copper bar 220 is connected to the other end of the auxiliary ground wire 210 , and the other end is connected to the main ground wire 400 . The bypass of the main ground wire 400 can be completed by the secondary ground wire 210 and the connecting copper bar 220 .
在本发明的一些实施例中，上述接地线防盗保护***还包括感应CT自取电装置500，感应CT自取电装置500用于通过电磁感应的方式从供电电缆上获取电能并供给接地电阻采集装置100和处理器单元300。采用感应CT自取电装置500之后，可以使得本发明实施例的接地线防盗保护***脱离外部电源的约束，一方面可以节约大量的布线，另一方面也可以使得本发明实施例的接地线防盗保护***布置的位置可以有更多的选择。In some embodiments of the present invention, the above-mentioned ground wire anti-theft protection system further includes an inductive CT self-power extraction device 500, and the inductive CT self-extraction device 500 is used to obtain electric energy from the power supply cable through electromagnetic induction and supply it to the grounding resistance for acquisition. Apparatus 100 and processor unit 300. After using the inductive CT self-power extraction device 500, the ground wire anti-theft protection system of the embodiment of the present invention can be freed from the constraints of the external power supply. There are more options for the placement of the protection system.
在本发明的一些实施例中，感应CT自取电装置500包括：互感器、电源模块。互感器，用于感应供电电缆中的电信号并输出电能；电源模块，与互感器连接，用于接收互感器输出的电能并进行整流、稳压、滤波后供给接地电阻采集装置100和处理器单元300。互感器可以直接感应到供电电缆中的电信号，进而产生电能，产生的电能传输到电源模块，通过电源模块进行整流、滤波、稳压等操作后进行供电。激励电压输出线圈120输出的激励电压就可以从电源模块 取电。In some embodiments of the present invention, the inductive CT self-power extraction device 500 includes: a transformer and a power module. The transformer is used to sense the electrical signal in the power supply cable and output electric energy; the power module is connected to the transformer and used to receive the electric energy output by the transformer, rectify, stabilize, filter and then supply the grounding resistance acquisition device 100 and the processor unit 300. The transformer can directly sense the electrical signal in the power supply cable, and then generate electric energy. The generated electric energy is transmitted to the power supply module, and the power supply is supplied after rectification, filtering, voltage regulation and other operations through the power supply module. The excitation voltage output by the excitation voltage output coil 120 can be powered from the power supply module.
在本发明的一些实施例中，上述接地线防盗保护***还包括与处理器单元300连接的无线通信单元600。处理器单元300通过无线通信单元600可以将采集的接地电阻数据传输到远端的监测平台800。无线通信单元600可以采用蓝牙、ZigBee、网络模块或GPRS模块等。In some embodiments of the present invention, the above-mentioned ground wire anti-theft protection system further includes a wireless communication unit 600 connected to the processor unit 300 . The processor unit 300 can transmit the collected grounding resistance data to the remote monitoring platform 800 through the wireless communication unit 600 . The wireless communication unit 600 may adopt Bluetooth, ZigBee, network module or GPRS module, etc.
在本发明的一些实施例中，上述接地线防盗保护***还包括设置在处理器单元300与无线通信单元600之间的信号转换单元700，信号转换单元700用于将处理器单元300输出的信号转换为抗干扰能力更强的信号。在进行信号传输时，为了提高数据的抗干扰能力，可以采用信号转换单元700将处理器单元300输出的信号转换，例如：将TTL电平信号转换为485信号，就可以提高抗干扰能力。In some embodiments of the present invention, the above-mentioned ground wire anti-theft protection system further includes a signal conversion unit 700 disposed between the processor unit 300 and the wireless communication unit 600 , and the signal conversion unit 700 is configured to convert the signal output by the processor unit 300 Converted to a signal with stronger anti-interference ability. During signal transmission, in order to improve the anti-interference ability of the data, the signal conversion unit 700 can be used to convert the signal output by the processor unit 300, for example, by converting the TTL level signal into a 485 signal, the anti-interference ability can be improved.
在本发明的一些实施例中，上述接地线防盗保护***还包括监测平台800，与处理器单元300连接，用于进行远端监测。监测平台800可以采用电脑直接作为监控设备，也可以采用平板电脑或手机等移动设备作为监控端。通过设置监测平台800，可以实现在需要对多个地点进行接地电阻采集时进行监测，进而便于对维护人员进行合理的调度。In some embodiments of the present invention, the above-mentioned ground wire anti-theft protection system further includes a monitoring platform 800 connected to the processor unit 300 for remote monitoring. The monitoring platform 800 may directly use a computer as a monitoring device, or may use a mobile device such as a tablet computer or a mobile phone as a monitoring terminal. By setting the monitoring platform 800, monitoring can be implemented when grounding resistance collection needs to be performed on multiple locations, thereby facilitating reasonable scheduling of maintenance personnel.
在本发明的一些实施例中，处理器单元300采用单片机或DSP。具体可以采用单片机作为处理器单元300，可选择包括但不限于STM32系列单片机。In some embodiments of the present invention, the processor unit 300 adopts a single chip microcomputer or a DSP. Specifically, a single-chip microcomputer may be used as the processor unit 300, and the single-chip microcomputer of the STM32 series may be selected but not limited to.
在本说明书的描述中，参考术语“一个实施例”、“一些实施例”、“示意性实施例”、“示例”、“具体示例”、或“一些示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包 含于本发明的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点可以在任何的一个或多个实施例或示例中以合适的方式结合。In the description of this specification, reference to the terms "one embodiment," "some embodiments," "exemplary embodiment," "example," "specific example," or "some examples", etc., is meant to incorporate the embodiments A particular feature, structure, material, or characteristic described by an example or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
尽管上述结合附图对本发明实施例作了详细说明，但是本发明不限于上述实施例，本领域的普通技术人员可以理解：在不脱离本发明的原理和宗旨的情况下可以对这些实施例进行多种变化、修改、替换和变型，本发明的范围由权利要求及其等同物限定。Although the above-mentioned embodiments of the present invention have been described in detail in conjunction with the accompanying drawings, the present invention is not limited to the above-mentioned embodiments, and those of ordinary skill in the art can understand that these embodiments can be carried out without departing from the principle and purpose of the present invention. For various changes, modifications, substitutions and alterations, the scope of the present invention is defined by the appended claims and their equivalents.
Claims (10)
- 一种接地线防盗保护***，其特征在于，包括：A ground wire anti-theft protection system, characterized in that it includes:接地电阻采集装置(100)，用于采集主接地线(400)的接地阻值；a grounding resistance collecting device (100), used for collecting the grounding resistance value of the main grounding wire (400);旁路接地保护装置(200)，与所述主接地线(400)并联，用于在所述主接地线(400)为供电电缆提供旁路接地；a bypass grounding protection device (200), connected in parallel with the main ground wire (400), for providing bypass grounding for the power supply cable at the main ground wire (400);处理器单元(300)，与所述接地电阻采集装置(100)连接，用于接收所述接地阻值。A processor unit (300) is connected to the grounding resistance collecting device (100), and is used for receiving the grounding resistance value.
- 根据权利要求1所述的接地线防盗保护***，其特征在于，所述接地电阻采集装置(100)包括：The anti-theft protection system for grounding wires according to claim 1, wherein the grounding resistance collecting device (100) comprises:输入信号采集线圈(110)，与所述处理器单元(300)连接，用于采集所述主接地线(400)的接地阻值并传输至所述处理器单元(300)；an input signal collecting coil (110), connected to the processor unit (300), for collecting the grounding resistance value of the main ground wire (400) and transmitting it to the processor unit (300);激励电压输出线圈(120)，用于输出激励电压至所述输入信号采集线圈(110)。An excitation voltage output coil (120) is used for outputting an excitation voltage to the input signal acquisition coil (110).
- 根据权利要求2所述的接地线防盗保护***，其特征在于，所述输入信号采集线圈(110)与所述处理器单元(300)之间依次连接有信号放大模块(130)、滤波模块(140)和数模转换模块(150)。The ground wire anti-theft protection system according to claim 2, characterized in that, a signal amplification module (130), a filter module ( 140) and a digital-to-analog conversion module (150).
- 根据权利要求3所述的接地线防盗保护***，其特征在于，所述数模转换模块(150)与所述处理器单元(300)之间连接有信号隔离器(160)。The anti-theft protection system for grounding wires according to claim 3, wherein a signal isolator (160) is connected between the digital-to-analog conversion module (150) and the processor unit (300).
- 根据权利要求1所述的接地线防盗保护***，其特征在于，所述旁路接地保护装置(200)包括：The ground wire anti-theft protection system according to claim 1, wherein the bypass grounding protection device (200) comprises:副接地线(210)，其一端与地连接；A secondary ground wire (210), one end of which is connected to the ground;连接铜排(220)，其一端与所述副接地线(210)的另一端连接，另一端与所述主接地线(400)连接。A copper bar (220) is connected, one end of which is connected to the other end of the secondary ground wire (210), and the other end is connected to the main ground wire (400).
- 根据权利要求1所述的接地线防盗保护***，其特征在于，还包括感应CT自取电装置(500)，所述感应CT自取电装置(500)用于通过电磁感应的方式从所述供电电缆上获取电能并供给所述接地电阻采集装置(100)和处理器单元(300)。The anti-theft protection system for grounding wires according to claim 1, further comprising an inductive CT self-power-taking device (500), wherein the inductive CT self-power-taking device (500) is configured to Electric power is obtained from the power supply cable and supplied to the grounding resistance collecting device (100) and the processor unit (300).
- 根据权利要求6所述的接地线防盗保护***，其特征在于，所述感应CT自取电装置(500)包括：The anti-theft protection system for a ground wire according to claim 6, wherein the inductive CT self-power extraction device (500) comprises:互感器，用于感应所述供电电缆中的电信号并输出电能；a transformer for sensing the electrical signal in the power supply cable and outputting electrical energy;电源模块，与所述互感器连接，用于接收所述互感器输出的电能并进行整流、稳压、滤波后供给所述接地电阻采集装置(100)和处理器单元(300)。The power supply module is connected with the transformer, and is used for receiving the electric energy output by the transformer, rectifying, stabilizing, filtering, and then supplying it to the grounding resistance collecting device (100) and the processor unit (300).
- 根据权利要求1所述的接地线防盗保护***，其特征在于，还包括与所述处理器单元(300)连接的无线通信单元(600)。The ground wire anti-theft protection system according to claim 1, characterized in that, further comprising a wireless communication unit (600) connected with the processor unit (300).
- 根据权利要求8所述的接地线防盗保护***，其特征在于，还包括设置在所述处理器单元(300)与无线通信单元(600)之间的信号转换单元(700)，所述信号转换单元(700)用于将所述处理器单元(300)输出的信号转换为抗干扰能力更强的信号。The anti-theft protection system for ground wires according to claim 8, further comprising a signal conversion unit (700) disposed between the processor unit (300) and the wireless communication unit (600), the signal conversion unit (700) The unit (700) is used for converting the signal output by the processor unit (300) into a signal with stronger anti-interference ability.
- 根据权利要求1或8所述的接地线防盗保护***，其特征在于，还包括监测平台(800)，与所述处理器单元(300)连接，用于进行远端监测。The ground wire anti-theft protection system according to claim 1 or 8, further comprising a monitoring platform (800) connected to the processor unit (300) for remote monitoring.
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| CN115656630A (en) * | 2022-09-29 | 2023-01-31 | 江苏省电力试验研究院有限公司 | High-precision testing method and device for loop resistance of cable cross-connection grounding system |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112557760A (en) * | 2020-12-11 | 2021-03-26 | 长缆电工科技股份有限公司 | Ground wire anti-theft protection system |
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| CN115656630B (en) * | 2022-09-29 | 2024-02-13 | 江苏省电力试验研究院有限公司 | High-precision testing method and device for loop resistance of cable cross-connection grounding system |
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| CN112557760A (en) | 2021-03-26 |
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