CN211554190U

CN211554190U - Device for displaying grounding point from ground under high-voltage line

Info

Publication number: CN211554190U
Application number: CN202020024728.9U
Authority: CN
Inventors: 田迎光; 唐洁; 张德军; 于静; 周丽娟; 苑博; 邸英杰; 陈丹; 李建; 周泽余; 苑会满
Original assignee: Tangshan Power Supply Co Of State Grid Hebei Electric Power Co ltd; State Grid Corp of China SGCC
Current assignee: Tangshan Power Supply Co Of State Grid Hebei Electric Power Co ltd; State Grid Corp of China SGCC
Priority date: 2020-01-07
Filing date: 2020-01-07
Publication date: 2020-09-22
Anticipated expiration: 2030-01-07

Abstract

The utility model relates to a from device of high tension line below ground demonstration ground point is applicable to the shaft tower of no earth connection, belongs to power system and patrols and examines technical field. The technical scheme is as follows: an electrode I (5) and an electrode II (6) are embedded under the ground (2) close to the tower, a signal processor (4) is composed of an operation module and a ground fault indication module, and the output ends of the electrode I (5) and the electrode II (6) are respectively connected with two input ends of an isolation transformer T1; the ground fault indication module is formed by sequentially connecting a card turning indication circuit and a night starting flash circuit. The utility model discloses a detect high tension transmission line ground lead current and ground potential difference, confirm whether to be the ground point, then send corresponding signal, can be used to the high tension transmission line of all no earth connection, convenient and fast seeks the ground point.

Description

Device for displaying grounding point from ground under high-voltage line

Technical Field

The utility model relates to a from device of high tension line below ground demonstration ground point is applicable to the shaft tower of no earth connection, belongs to power system and patrols and examines technical field.

Background

At present, the number of grounding accidents of 35kV and 10kV high-voltage transmission lines is large, and the frequent peak of the grounding accidents is in the thunderstorm season. If a certain transmission line has a ground fault, auxiliary equipment such as a lightning arrester-free switch and the like is only an insulator. The insulator of the overhead line can generate flashover discharge or breakdown due to the mechanical damage caused by external force, overvoltage, cracking, unglazed, serious natural aging and dirt accumulation (dust pollution and filth), and the like, so that large-area power failure is caused due to grounding. Such accidents often occur on 10kV 35kV lines. The insulator causes grounding accidents, if the insulator has an obvious breakdown point, the insulator can be seen by a high power telescope when the grounding is searched, the searching by an unmanned helicopter can also be found, and the insulator can be directly replaced by a new insulator after the grounding point is determined. However, the insulator has an obvious breakdown point which only accounts for about 40%, 60% of the insulator has an unobvious appearance after the interior of the insulator is cracked, the insulator cannot be directly observed from the appearance, and a high-power telescope and an unmanned helicopter cannot find the insulator, and the insulator can only depend on manual pole climbing operation to carefully observe or actually measure the good and the bad of the insulator by using an instrument. The prior art has the following problems: the method comprises the following steps that a first-line worker searches a grounding point of a power transmission line, which is the most arduous work, and in the actual work, the grounding point is mainly found by visual inspection; some designs a fault indicator, but the working principle of the fault indicator is to detect 5 th harmonic after a line is grounded, so that the fault indicator has many false actions, is unreliable and has poor practical application effect. The shaft tower of high-tension line divide into there is the earth connection and does not have the earth connection two kinds, and to the shaft tower that has the earth connection, applicant's utility model patent 201510792698, "an arrester ground indicator and arrester ground indication method" has solved above-mentioned problem. However, for towers without grounding wires, the prior art has no effective solution.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a from device of high tension line below ground demonstration ground point is applicable to the shaft tower of no earth connection, through detecting high tension transmission line ground lead current and ground potential difference, confirms whether to be the ground point, then sends corresponding signal, can be used to the high tension transmission line of all no earth connections, and convenient and fast seeks the ground point, solves the above-mentioned problem that exists among the background art.

The technical scheme of the utility model is that:

a device for displaying a grounding point from the ground below a high-voltage line is characterized in that a solar cell panel is arranged at the upper part of a tower, a signal processor, an alarm display and a color reproduction plate indicator are arranged at the lower part of the tower, a first electrode and a second electrode are embedded under the ground close to the tower, the first electrode and the second electrode are positioned on the same straight line, the first electrode is positioned between the tower and the second electrode, the first electrode abuts against the tower, the first electrode and the second electrode are separated by 1 meter, the central line of the first electrode, the central line of the second electrode and the central line of the tower are parallel to each other, and the three central lines are positioned in the same plane; the signal processor comprises operation module and earth fault indication module, the operation module includes: the isolation transformer T1, the alternating current amplitude limiting circuit, the current limiting protection circuit and the amplifying circuit are sequentially connected, and the output ends of the first electrode and the second electrode are respectively connected with two input ends of the isolation transformer T1; the ground fault indication module is formed by sequentially connecting a tile turning indication circuit and a night starting flashing circuit, the tile turning indication circuit is formed by sequentially connecting a field effect tube Q4, a triode Q3, a relay K1, a color reproduction plate motor M and a turning limit S1, the output end of the amplification circuit is connected with the field effect tube Q4, the color reproduction plate motor M is in driving connection with a color reproduction plate indicator, and the turning limit S1 is positioned on the color reproduction plate indicator; the night starting flash circuit is formed by sequentially connecting an on-off oscillation circuit, a triode Q1, a light emitting tube LED1-6 and a voltage comparison circuit; the LED1-6 is an alarm display, the color plate indicator is composed of a color plate motor M, a turnover limit S1 and a color plate, the color plate is arranged on a motor shaft of the color plate motor M, the color plate has two colors, the color plate motor M drives the color plate to rotate, the color plate is matched with the turnover limit S1, and the rotation angle of the color plate is limited.

The solar cell panel is formed by sequentially connecting a solar panel, a lithium battery pack and a voltage stabilizing circuit, the solar panel is connected with the lithium battery pack for charging, and the lithium battery pack outputs power after passing through the voltage stabilizing circuit and supplies power for the signal processor, the alarm display and the color-turning plate indicator.

The alternating current amplitude limiting circuit is composed of a resistor R1 and a diode D1, the current limiting protection circuit is composed of a resistor R2 and a resistor R3, the amplifying circuit is composed of a chip U2, and the chip U2 is a VG54-123-M chip produced by Shanghai microcrystal science and technology company.

The isolation transformer T1 isolates high potential to ensure the safety of instruments and personnel; an alternating current amplitude limiting circuit consisting of a resistor R1 and a diode D1 controls an alternating current signal to be below 3V, the alternating current signal enters a chip U2 of an amplifying circuit after forming a current-limiting protection circuit through a resistor R2 and a resistor R3, the chip is a VG54-123-M chip produced by Shanghai microcrystal science and technology company, the chip is high in input sensitivity, the typical value is VT =61mv, the core function is to amplify micro current and is used for judging whether the amplifying circuit outputs high level, and when the local current is larger than 0.01A and has time delay larger than 5 milliseconds, the high level is output.

The comparison circuit is composed of a voltage comparison chip U4, a photosensitive diode, a resistor R6, a resistor R7 and a resistor R8, sunlight light is strong in the daytime, the comparison circuit outputs high level, the triode Q2 is not conducted, and the alarm display does not work. At night, a triode Q2 is switched on, the on-off oscillation circuit is composed of a 555 chip U3, a capacitor C11, a resistor R4, a resistor R5, a diode D2 and a diode D3, the 555 chip U3 outputs 3 seconds of low level and 2 seconds of high level, the on-off of the triode Q1 is controlled, the light of a light emitting tube LED1-6 flashes, and inspection personnel can find the triode conveniently from a distant place.

The voltage comparison chip U4 is LM393, the photosensitive diode is GJI photosensitive diode.

The color reproduction plate indicator, the signal processor and the alarm display are arranged in a barrel-shaped shell, a shield is arranged at an opening at the upper end of the shell, and the alarm display is arranged on the outer wall of the shell; interior bottom is equipped with signal processor 'S circuit board and isolation transformer T1, and casing upper portion is equipped with color reproduction board motor M, and color reproduction board motor M' S motor shaft is upwards arranged perpendicularly, is equipped with the color palette on the motor shaft, and the color palette has two kinds of colours red and white, and the color palette is located the guard shield, and the spacing S1 of upset sets up on the guard shield, restriction color palette turned angle, and it has the window to open on the guard shield.

When a certain insulator is broken down and a ground fault occurs, grounding current is guided to the ground along a tower; a step voltage which takes the tower as the center of a circle and spreads to the periphery appears on the ground below the tower; the first electrode and the second electrode buried under the ground generate voltage difference signals, the voltage difference signals enter an isolation transformer T1, and the isolation transformer T1 isolates high potential to guarantee safety; the output signal passes through an alternating current amplitude limiting circuit, so that the alternating current signal is controlled below 3V; after passing through the current-limiting protection circuit, the current enters an amplifying circuit, and when the current is greater than 0.01A and has a delay time of more than 5 milliseconds, a high level is output; the rest outputs low level;

outputting high level to enable the field effect transistor Q4 to be conducted and to be connected with the negative electrode of the solar panel power supply; the card turning indicating circuit works, firstly, the triode Q3 conducts the relay K1 to act, the color plate turning motor M rotates, and the color plate rotates from one color to another color, so that patrolmen can find the color plate conveniently in the daytime; after the color plate rotates in place, the turnover limit S1 is triggered, and the color plate motor M stops rotating; if the sunlight is strong in the daytime, the voltage comparison circuit outputs high level, and the alarm display does not work; if the voltage is at night, the voltage comparison circuit outputs low level, and the alarm display works; the light is emitted, so that inspection personnel can find the object from a remote place conveniently.

The utility model has the advantages that: the grounding point detection method is suitable for towers without grounding wires, determines whether the grounding point is the grounding point by detecting the current of the grounding lead of the high-voltage transmission line and the potential difference of the ground, and then sends out corresponding signals, can be used for all high-voltage transmission lines without grounding wires, and can conveniently and quickly find the grounding point.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

fig. 2 is a schematic view of a housing according to an embodiment of the invention;

fig. 3 is a schematic view of the interior of a housing according to an embodiment of the present invention;

fig. 4 is a schematic view of a solar panel according to an embodiment of the present invention;

fig. 5 is a schematic diagram of an operation module according to an embodiment of the present invention;

fig. 6 is a schematic diagram of a card-turning indication circuit and a night-time starting flashing circuit according to an embodiment of the present invention;

in the figure: the solar energy monitoring system comprises a tower 1, a ground 2, a solar cell panel 3, a signal processor 4, a first electrode 5, a second electrode 6, an alarm display 7, a color turning plate indicator 8, a shell 9, a motor shaft 10, a shield 11, a color plate 12, a window 13 and a solar panel 14.

Detailed Description

The technical solution of the present invention will be further described in detail with reference to the accompanying drawings and embodiments.

A device for displaying a grounding point from the ground below a high-voltage line is characterized in that a solar cell panel 3 is arranged at the upper part of a tower 1, a signal processor 4, an alarm display 7 and a color-turning plate indicator 8 are arranged at the lower part of the tower 1, a first electrode 5 and a second electrode 6 are embedded under the ground 2 close to the tower, the first electrode 5 and the second electrode 6 are positioned on a straight line, the first electrode 5 is positioned between the tower and the second electrode 6, the first electrode 5 abuts against the tower, the distance between the first electrode 5 and the second electrode 6 is 1 meter, the central lines of the first electrode 5, the second electrode 6 and the tower 1 are parallel to each other, and the three central lines are positioned in the same plane vertical to the ground; the signal processor 4 is composed of an operation module and a ground fault indication module, wherein the operation module comprises: the isolation transformer T1, the alternating current amplitude limiting circuit, the current limiting protection circuit and the amplifying circuit are sequentially connected, and the output ends of the first electrode 5 and the second electrode 6 are respectively connected with two input ends of the isolation transformer T1; the ground fault indication module is formed by sequentially connecting a tile turning indication circuit and a night starting flashing circuit, the tile turning indication circuit is formed by sequentially connecting a field effect tube Q4, a triode Q3, a relay K1, a color reproduction plate motor M and a turning limit S1, the output end of the amplification circuit is connected with the field effect tube Q4, the color reproduction plate motor M is in driving connection with a color reproduction plate indicator 8, and the turning limit S1 is positioned on the color reproduction plate indicator 8; the night starting flash circuit is formed by sequentially connecting an on-off oscillation circuit, a triode Q1, a light emitting tube LED1-6 and a voltage comparison circuit; the LED1-6 is an alarm display 7, the color plate indicator 8 is composed of a color plate motor M, a turning limit S1 and a color plate 12, the color plate 12 is arranged on a motor shaft 10 of the color plate motor M, the color plate has two colors, the color plate motor M drives the color plate to rotate, and the color plate is matched with the turning limit S1 to limit the rotation angle of the color plate.

The solar cell panel 3 is formed by sequentially connecting a solar panel 14, a lithium battery pack BT1 and a voltage stabilizing circuit, the solar panel is connected with the lithium battery pack for charging, and the lithium battery pack outputs power after passing through the voltage stabilizing circuit and supplies power for the signal processor 4, the alarm display 7 and the color turning plate indicator 8.

The comparison circuit consists of a voltage comparison chip U4, a photosensitive diode, a resistor R6, a resistor R7 and a resistor R8, sunlight rays are strong in the daytime, the comparison circuit outputs high level, the triode Q2 is not conducted, and the alarm display 7 does not work; at night, a triode Q2 is switched on, the on-off oscillation circuit is composed of a 555 chip U3, a capacitor C11, a resistor R4, a resistor R5, a diode D2 and a diode D3, the 555 chip U3 outputs 3 seconds of low level and 2 seconds of high level, the on-off of the triode Q1 is controlled, the light of a light emitting tube LED1-6 flashes, and inspection personnel can find the triode conveniently from a distant place.

The color reproduction plate indicator 8, the signal processor 4 and the alarm display 7 are arranged in a barrel-shaped shell 9, a shield 11 is arranged at an opening at the upper end of the shell, and the alarm display 7 is arranged on the outer wall of the shell 9; the bottom is equipped with signal processor 4 'S circuit board and isolation transformer T1, and casing upper portion is equipped with color plate motor M, and color plate motor M' S motor shaft 10 upwards arranges perpendicularly, is equipped with color palette 12 on the motor shaft 10, and color palette 12 has two kinds of red and white colours, and color palette 12 is located guard shield 11, and the spacing S1 of upset sets up on the guard shield, restriction color palette turned angle, and it has window 13 to open on the guard shield.

When a certain insulator is broken down and a ground fault occurs, grounding current is guided to the ground along a tower; a step voltage which takes the tower as the center of a circle and spreads to the periphery appears on the ground below the tower 1; the first electrode 5 and the second electrode 6 buried under the ground 2 generate voltage difference signals, the voltage difference signals enter an isolation transformer T1, and the isolation transformer T1 isolates high potential to guarantee safety; the output signal passes through an alternating current amplitude limiting circuit, so that the alternating current signal is controlled below 3V; after passing through the current-limiting protection circuit, the current enters an amplifying circuit, and when the current is greater than 0.01A and has a delay time of more than 5 milliseconds, a high level is output; the rest outputs low level;

outputting high level to enable the field effect transistor Q4 to be conducted and switching on the negative electrode of the power supply of the solar panel 3; the card turning indicating circuit works, firstly, the triode Q3 conducts the relay K1 to act, the color plate turning motor M rotates, and the color plate rotates from one color to another color, so that patrolmen can find the color plate conveniently in the daytime; after the color plate rotates in place, the turnover limit S1 is triggered, and the color plate motor M stops rotating; if the sunlight is strong in the daytime, the voltage comparison circuit outputs high level, and the alarm display 7 does not work; if the voltage is at night, the voltage comparison circuit outputs low level, and the alarm display 7 works; the light is emitted, so that inspection personnel can find the object from a remote place conveniently.

In the embodiment, when a fault occurs in a certain position due to the defect of the insulator, the grounding current is guided to the ground along the straight rod. A potential (i.e., a step voltage) which spreads to the periphery around the electric pole appears on the ground below the electric pole. If people get close to the electric shock device at the moment, the electric shock device is dangerous and can get an electric shock due to the step voltage. It is proved from the side that when two electrodes are installed, one close to the electric pole and the other one meter away from the electric pole, a strong potential difference exists between the two electrodes, and then the grounding signal can be obtained. The whole block diagram of the utility model is shown in the attached figure 4, and the block diagram of the embodiment is shown in the attached figure 5.

The solar panel 3 is a long-acting power supply, and the schematic diagram is shown in figure 4; the micro 12V20ma solar panel can obtain energy, and the energy is charged to the 15V lithium iron battery BT1 through the diode D1 and the capacitor C1, and then a long-acting reliable working power supply is provided for a subsequent circuit through the 7812V voltage stabilizing circuit.

The schematic diagram of the operation module is shown in figure 5, an electrode I5 and an electrode II 6 are arranged in the soil of the ground 2 below the tower 1 at a distance of 1 meter, and an isolation transformer T1 isolates high potential to guarantee the safety of instruments and personnel. A resistor R1 and a diode D1 carry out alternating current amplitude limiting, so that an alternating current signal is controlled below 3V; the current is limited and protected by a resistor R2 and a resistor R3 and then enters a chip U2, the chip is a VG54-123-M chip produced by Shanghai microcrystal science and technology company, the input sensitivity is high, and the typical value is VT =61 mv. The core function is to amplify the tiny current, the current of the ground wire is more than 0.01A and has the time delay of more than 5 milliseconds, and the high level is output.

The schematic diagram of the card-turning indicating circuit and the night starting flashing circuit is shown in the attached figure 6; when the ground signal is output, the pin 7 of the U2 chip outputs high level. When the field effect transistor Q4 is conducted and is equal to the negative pole of the power supply, the triode Q3 is firstly conducted, the relay K1 is operated, the color plate motor M rotates, the color plate 12 rotates from white to red, the touch overturning limit S1 is opened, and the color plate motor M stops rotating. The voltage comparison chip U4 is an LM393 voltage comparison chip, and forms a voltage comparison circuit with the photodiode GJI, the resistor R6, the resistor R7, and the resistor R8.

If the time is daytime and the sunlight is strong, high level is output, the triode Q2 is not conducted, the alarm display 7 does not work in daytime, and the color plate turning motor M works; if at night, the voltage comparison circuit outputs low level, the triode Q2 is conducted, the 555 chip U3, the capacitor C11, the resistor R4, the resistor R5, the diode D2 and the diode D3 form an on-off oscillation circuit, 3-pin output of the 555 chip U3 is low level for 3 seconds and high level for 2 seconds, the on-off of the triode Q1 is controlled, the light of the light-emitting tube LED1-6 flashes, namely, the alarm display 7 flashes, and inspection personnel can find the circuit from a distance.

In an embodiment, the solar panel 14 is a 12v50mA photovoltaic panel, and is integrally cast with a strong magnet through epoxy resin, so as to be directly adhered to the framework hardware. The first electrode and the second motor are made of carbon rods, so that the electric conductivity is high, the corrosion resistance is realized, and the long-term burying and underground are facilitated.

The utility model discloses the theory of operation is clear, and it is convenient to install, and the quality of check out test set often more is convenient for, and transmission line takes place the ground connection after, can have the demonstration on the below ground of ground point, need not scramble and look over to the shaft tower, lays the basis for finding the accident point fast accurately, resumeing the power transmission.

Claims

1. The utility model provides a follow device of high-voltage line below ground demonstration ground point which characterized in that: the solar energy pole tower comprises a pole tower (1), a solar cell panel (3) arranged on the upper portion of the pole tower (1), a signal processor (4), an alarm display (7) and a color-turning plate indicator (8) arranged on the lower portion of the pole tower (1), a first electrode (5) and a second electrode (6) are buried under the ground (2) close to the pole tower, the first electrode (5) and the second electrode (6) are arranged on the same straight line, the first electrode (5) is located between the pole tower and the second electrode (6), the first electrode (5) abuts against the pole tower, the distance between the first electrode (5) and the second electrode (6) is 1 meter, the central line of the first electrode (5), the central line of the second electrode (6) and the central line of the pole tower (1) are parallel to each other; the signal processor (4) is composed of an operation module and a ground fault indication module, wherein the operation module comprises: the isolation transformer T1, the alternating current amplitude limiting circuit, the current limiting protection circuit and the amplifying circuit are sequentially connected, and the output ends of the first electrode (5) and the second electrode (6) are respectively connected with two input ends of the isolation transformer T1; the ground fault indication module is formed by sequentially connecting a tile turning indication circuit and a night starting flashing circuit, the tile turning indication circuit is formed by sequentially connecting a field effect tube Q4, a triode Q3, a relay K1, a color turning plate motor M and a turning limit S1, the output end of the amplification circuit is connected with the field effect tube Q4, the color turning plate motor M is in driving connection with a color turning plate indicator (8), and the turning limit S1 is positioned on the color turning plate indicator (8); the night starting flash circuit is formed by sequentially connecting an on-off oscillation circuit, a triode Q1, a light emitting tube LED1-6 and a voltage comparison circuit; the LED1-6 is an alarm display (7), the color plate indicator (8) is composed of a color plate motor M, a turnover limit S1 and a color plate (12), the color plate (12) is arranged on a motor shaft (10) of the color plate motor M, two colors are arranged on the color plate, the color plate motor M drives the color plate to rotate, the color plate is matched with the turnover limit S1, and the rotation angle of the color plate is limited.

2. An arrangement for indicating a ground point from the ground below a high voltage line according to claim 1, wherein: solar cell panel (3) are connected gradually by solar panel (14), lithium cell group BT1 and voltage stabilizing circuit and are constituted, and solar panel is connected with the lithium cell group and is charged, and the lithium cell group exports power supply behind voltage stabilizing circuit, for signal processor (4), warning display (7) and color turning plate indicator (8) power supply.

3. An arrangement for indicating a ground point from the ground below a high voltage line according to claim 1 or 2, characterised in that: the comparison circuit consists of a voltage comparison chip U4, a photosensitive diode, a resistor R6, a resistor R7 and a resistor R8, sunlight rays are strong in the daytime, the comparison circuit outputs high level, the triode Q2 is not conducted, and the alarm display (7) does not work; and a low level is output at night, the triode Q2 is switched on, the on-off oscillation circuit consists of a 555 chip U3, a capacitor C11, a resistor R4, a resistor R5, a diode D2 and a diode D3, the 555 chip U3 outputs 3 seconds of low level and 2 seconds of high level, and the on-off of the triode Q1 is controlled to enable the light of the light emitting tube LED1-6 to flash.

4. An arrangement for indicating a ground point from the ground below a high voltage line according to claim 1 or 2, characterised in that: the color reproduction plate indicator (8), the signal processor (4) and the alarm display (7) are arranged in the barrel-shaped shell (9), a shield (11) is arranged at an opening at the upper end of the barrel-shaped shell, and the alarm display (7) is arranged on the outer wall of the shell (9); interior bottom is equipped with signal processor (4)' S circuit board and isolation transformer T1, and casing upper portion is equipped with color plate motor M, and motor shaft (10) of color plate motor M upwards arrange perpendicularly, is equipped with look board (12) on motor shaft (10), and look board (12) have red two kinds of colours white, and look board (12) are located guard shield (11), and the spacing S1 of upset sets up on the guard shield, restriction look board turned angle, and it has window (13) to open on the guard shield.