CN107247177B - Remote control distribution network electricity testing and grounding wire detection device - Google Patents

Remote control distribution network electricity testing and grounding wire detection device Download PDF

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Publication number
CN107247177B
CN107247177B CN201710642399.7A CN201710642399A CN107247177B CN 107247177 B CN107247177 B CN 107247177B CN 201710642399 A CN201710642399 A CN 201710642399A CN 107247177 B CN107247177 B CN 107247177B
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CN
China
Prior art keywords
signal
detection
remote control
electricity testing
distribution network
Prior art date
Application number
CN201710642399.7A
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Chinese (zh)
Other versions
CN107247177A (en
Inventor
卢崇毅
于鑫
刘雪梅
张相成
赫然
陈润晶
高强
李健
甘涌涛
吴克强
Original Assignee
国网辽宁省电力有限公司丹东供电公司
国家电网公司
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Application filed by 国网辽宁省电力有限公司丹东供电公司, 国家电网公司 filed Critical 国网辽宁省电力有限公司丹东供电公司
Priority to CN201710642399.7A priority Critical patent/CN107247177B/en
Publication of CN107247177A publication Critical patent/CN107247177A/en
Application granted granted Critical
Publication of CN107247177B publication Critical patent/CN107247177B/en

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/145Indicating the presence of current or voltage
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/025Measuring very high resistances, e.g. isolation resistances, i.e. megohm-meters
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/16Measuring impedance of element or network through which a current is passing from another source, e.g. cable, power line
    • G01R27/18Measuring resistance to earth, i.e. line to ground
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/20Measuring earth resistance; Measuring contact resistance, e.g. of earth connections, e.g. plates
    • G01R27/205Measuring contact resistance of connections, e.g. of earth connections

Abstract

The invention discloses a remote control distribution network electricity testing and grounding wire detection device which comprises a wire clamp, an insulating wire, an intelligent detection device, an optical cable and an automatic background, wherein the wire clamp is clamped on a conducting wire, the tail end of the wire clamp is connected with the intelligent detection device through the insulating wire, the intelligent detection device is connected with the automatic background through the optical cable, and the automatic background is provided with a microprocessor, a remote control unit and an LCD display screen. The invention is fixed on a distribution network circuit, has double functions of detecting whether the circuit is electrified or not and detecting whether a residual grounding wire exists or not, can realize the remote real-time control function, and has the functions of an LCD display screen, a buzzer and an alarm. The megger detection device has triple early warning protection of a buzzer, an indicator light and voice, timely reminds a user whether the equipment for operation, maintenance or test is electrified or the ground wire is still left over, and is a safety protection device with an alarm function.

Description

Remote control distribution network electricity testing and grounding wire detection device

Technical Field

The invention relates to electric power overhaul equipment used in operation, accident handling and overhaul operation of an electric power distribution network, in particular to a remote control distribution network electricity testing and grounding wire detecting device.

Background

Before the electric power distribution network maintenance work begins, whether the staff need to verify the power-off line before live, usually adopt high-voltage electroscope to test the electricity. Current electroscope is including testing electric portion, insulating part and handle portion, tests electric portion and handle portion and connects respectively in the both ends of insulating part, tests and installs the alarm in the electric portion, and the alarm turns into acousto-optic signal with the electric charge that the detecting head detected, and whether the prompt action through the alarm comes the judgement equipment electrified. However, due to the noise interference effect during the operation of the transformer substation, the decibel of the alarm sound emitted by the alarm is very weak, so that it is difficult for the human ear to clearly distinguish whether the alarm is giving an alarm or not, and whether the equipment to be detected is electrified or not cannot be accurately judged. When the existing electroscope is used for high-altitude operation detection, the detection effect is not obvious, the use occasions are limited, and the problem that the power grid urgently waits to be solved is also solved. After the electric power distribution network line maintenance work is finished, power grid dispatching personnel and operation operating personnel need to continuously check to confirm that all ground wires are taken down, and then can be switched on and power is transmitted. If the distribution network has a large power failure line range, the number of hung ground wires is large, and manual inspection is inevitable to leave omission. According to data, the accident cases of closing and power transmission with a grounding wire of a power grid enterprise are frequently shown, the accident brings great impact and damage to running power equipment, the safe and stable running of a power system is seriously influenced, and the problem which cannot be avoided in the power industry all the time is solved.

If the instrument has the functions of remote control and local operation, the electrified condition of the distribution network line to be detected is intuitively judged, and the detection effect is obvious; the device can also assist operation operators to detect whether the ground wire of the distribution network line to be powered is leaked or not, so that the probability of accidents can be reduced or avoided.

Disclosure of Invention

The invention aims to provide a remote control distribution network electricity testing and grounding wire detecting device which has two functions of detecting whether a power failure line is electrified or not and whether grounding wires are left or not, can be controlled in real time through a remote control unit, and can display a detection result in an automatic background.

In order to solve the technical problems, the invention adopts the technical scheme that:

the remote control distribution network electricity testing and grounding wire detection device comprises a wire clamp, an insulated wire, an intelligent detection device, an optical cable and an automatic background, wherein the wire clamp is clamped on a conducting wire, the tail end of the wire clamp is connected with the intelligent detection device through the insulated wire, the intelligent detection device is connected with the automatic background through the optical cable, and the automatic background is provided with a microprocessor, a remote control unit and an LCD (liquid crystal display) screen; the intelligent detection device comprises an electricity testing module, a protection module and a grounding wire detection module, wherein the electricity testing module and the grounding wire detection module are connected through the protection module, and are respectively and electrically connected with the remote control unit; the protection module comprises a relay coil, and when the relay coil is electrified, the protection module is in an open state and is conducted with the electricity testing module; when the relay coil is not electrified, the protection module is in a closed state, and the detection grounding wire module is conducted.

The electricity testing module comprises a detecting head, an alarm, a signal generator, a signal receiver and an indicator light; the utility model discloses a signal receiver, including the detector head, signal generator, control circuit, signal receiver, warning light, signal generator, signal receiver, control circuit, display panel, detection head be the metal probe, be located the front end of electroscope module, be connected the electric charge that detects the detector head with the alarm and turn into audible and visual signal, signal generator includes the transmitter, the transmitter passes through control circuit and is connected with the detector head, control circuit turns into electrified signal with the electric charge, sends electrified signal to signal receiver through the transmitter, signal receiver includes receiver and power, and the receiver is right through control circuit electrified signal is received and is discerned for receive and discernment electrified signal, and order about the.

The ground wire detection module comprises an insulation resistance tester, a metal contact, an internal battery and an alarm; the insulation resistance tester utilizes a pulse width modulation circuit to generate direct current high voltage, a linear ammeter is used for displaying and measuring, if a detected line is provided with a grounding wire, the detection device displays a high-resistance value and gives out a warning sound, and if the detected line is not provided with the grounding wire, the detection device displays infinite resistance value; the metal contact is connected with the L end of the insulation resistance tester, the E end is connected with the grounding ring, and the G end is connected with the shielding ring; the DC high voltage generated by DC/DC conversion of the built-in battery as a power supply is output from the E pole and passes through the tested object to the L pole, so that a current from the E pole to the L pole is generated, and the electrified signal is received and identified through the control circuit.

The alarm comprises a buzzer for sounding alarm and an alarm lamp for emitting light alarm, wherein the buzzer and the alarm lamp are respectively connected with the control circuit.

The automatic background comprises a signal processing device and a signal control device.

The signal processing device comprises a signal input unit, a signal output unit, a signal processing unit and a communication cable.

The signal output unit receives a control signal of the remote control unit and respectively controls the opening and closing of the intelligent detection device, and the signal input unit processes information transmitted from the intelligent detection device; the detection information is converted into a control signal through the signal processing unit and is sent to the control part; and finally, outputting the signal to an automatic background through a communication cable.

The signal control device comprises a signal input unit, a signal control unit, a control signal output unit and a control cable; an operator conducts electricity testing and grounding detection on the distribution network line on the site of the device or an automatic background, an operation signal is transmitted to the control unit through the control cable, and remote control operation is conducted on the device; and after the successful operation, the operation is transmitted to the control signal output unit to complete the control process.

The invention has the advantages that:

the invention relates to a remote control distribution network electricity testing and grounding wire detection device, which is provided with a wire clamp, an insulating wire, an intelligent detection device, an optical cable and an automatic background, wherein the wire clamp is clamped on a conducting wire, the tail end of the wire clamp is connected with the intelligent detection device through the insulating wire, the intelligent detection device is connected with the automatic background through the optical cable, and the automatic background is provided with a structure comprising a microprocessor, a remote control unit and an LCD display screen. The megger detection device has triple early warning protection of a buzzer, an indicator light and voice, timely reminds a user whether the equipment for operation, maintenance or test is electrified or the ground wire is still left over, and is a safety protection device with an alarm function.

Drawings

The invention is described in further detail below with reference to the accompanying drawings:

FIG. 1 is a cross-sectional view of the overall structure of the remote control power distribution network line electricity testing and ground wire detecting device of the present invention;

FIG. 2 is a block diagram of the schematic structure of the intelligent detection device;

fig. 3 is a schematic structure block diagram of the remote control distribution network line electricity testing and ground wire detecting device of the invention.

In the figure: a wire 1; a wire clamp 2; an insulated wire 3; an intelligent detection device 4; an optical cable 5; an automation back-end 6.

Detailed Description

The present invention is further illustrated by the following specific examples, which are intended to be illustrative, not limiting and are not intended to limit the scope of the invention.

As shown in fig. 1, the remote control electricity testing and grounding wire detecting device for the distribution network comprises a wire 1, a wire clamp 2, an insulated wire 3, an intelligent detecting device 4, an optical cable 5 and an automatic background 6, wherein the wire clamp 2 plays a role in fixing and is used for connecting the wire 1 of a distribution network line and the insulated wire 3, the wire clamp 2 is clamped on the wire 1, the tail end of the wire clamp is connected with the insulated wire 3, the insulated wire 3 is connected with the intelligent detecting device 4, and the intelligent detecting device 4 is connected with the automatic background 6 through the optical cable 5. The current information of the detected line is transmitted to the intelligent detection device 4 by the insulated wire 3, the detection device 4 receives remote control information transmitted by the automatic background through the optical cable 5, whether the line is electrified or whether a grounding wire is left or not is detected, and a detection result is displayed on the automatic background 6 through the optical cable 5.

As shown in fig. 2, the intelligent detection device 4 includes an electricity testing module and a detection ground wire module, wherein the electricity testing module includes a detection head, an alarm, a signal generator, a signal receiver and an indicator light; the ground wire detection module comprises an insulation resistance tester, a metal contact, an internal battery and an alarm.

The intelligent detection device 4 comprises an electricity testing module and a detection grounding wire module, the electricity testing module and the detection grounding wire module are connected through a protection module, and the electricity testing module and the detection grounding wire module are respectively connected with a remote control unit; when the relay coil is electrified, the protection module is in an open state; when the relay coil is not electrified, the protection module is in a closed state, and the detection grounding wire part is conducted.

The utility model discloses a signal receiver, including the detector head, signal generator, control circuit, signal receiver, warning light, signal generator, signal receiver, control circuit, display panel, detection head be the metal probe, be located the front end of electroscope module, be connected the electric charge that detects the detector head with the alarm and turn into audible and visual signal, signal generator includes the transmitter, the transmitter passes through control circuit and is connected with the detector head, control circuit turns into electrified signal with the electric charge, sends electrified signal to signal receiver through the transmitter, signal receiver includes receiver and power, and the receiver is right through control circuit electrified signal is received and is discerned for receive and discernment electrified signal, and order about the.

The insulation resistance tester utilizes a pulse width modulation circuit to generate direct current high voltage, a linear ammeter is used for displaying and measuring, if a detected line is provided with a grounding wire, the detection device displays a high-resistance value and gives out a warning sound, and if the detected line is not provided with the grounding wire, the detection device displays infinite resistance value; the metal contact is connected with the L end of the insulation resistance tester, the E end is connected with the grounding ring, and the G end is connected with the shielding ring; the DC high voltage generated by DC/DC conversion of the built-in battery as a power supply is output from the E pole and passes through the tested object to the L pole, so that a current from the E pole to the L pole is generated, and the electrified signal is received and identified through the control circuit; the alarm comprises a buzzer for sounding alarm and an alarm lamp for emitting light alarm, wherein the buzzer and the alarm lamp are respectively connected with the control circuit.

The automatic background comprises a signal processing device and a signal control device.

The signal processing device comprises a signal input unit, a signal output unit, a signal processing unit and a communication cable.

As shown in fig. 3, the signal output unit receives a control signal from the remote control unit to control the opening and closing of the intelligent detection device, respectively, and the signal input unit processes information transmitted from the detection device; the detection information is converted into a control signal through the signal processing unit and is sent to the control part; and finally, outputting the signal to an automatic background through a communication cable. The direct current amplifying unit generates direct current high voltage by using a pulse width modulation circuit, uses a linear ammeter as local display and measurement, and connects the L end of the tester with the metal contact of the detection device through a lead, the E end with the grounding ring, and the G end with the shielding ring. The DC high voltage generated by DC/DC conversion from the battery in the machine as the power source is output from the E pole to the L pole through the tested object, thus generating a current from the E pole to the L pole, the microprocessor finishes the operation through the divider, then the current is displayed by the LCD display, and the signal is sent to the buzzer for alarming.

The signal control device comprises a signal input unit, a signal control unit, a control signal output unit and a control cable; an operator conducts electricity testing and grounding detection on the distribution network line on the site of the device or an automatic background, an operation signal is transmitted to the control unit through the control cable, and remote control operation is conducted on the device; and after the successful operation, the operation is transmitted to the control signal output unit to complete the control process.

The remote control operation of the remote control distribution network electricity testing and grounding wire detection device needs 2 persons to operate, one person executes the operation, one person audits the operation, and a single person is forbidden to operate under the condition of no monitoring. If the timeout problem is encountered twice continuously in the remote control operation process, the operation is not carried out any more, and the automation personnel are contacted. Before remote operation, operators need to be contacted to confirm whether the site has the operation conditions.

Claims (6)

1. Distant place remote control distribution network tests electricity and earth connection detection device, its characterized in that: the intelligent detection device is connected with the automatic background through the optical cable, and the automatic background is provided with a microprocessor, a remote control unit and an LCD display screen; the intelligent detection device comprises an electricity testing module, a protection module and a grounding wire detection module, wherein the electricity testing module and the grounding wire detection module are connected through the protection module, and are respectively and electrically connected with the remote control unit; the protection module comprises a relay coil, and when the relay coil is electrified, the protection module is in an open state and is conducted with the electricity testing module; when the relay coil is not electrified, the protection module is in a closed state, and the detection grounding wire module is conducted; the electricity testing module comprises a detecting head, an alarm, a signal generator, a signal receiver and an indicator light; the detector head is a metal probe, is positioned at the front end of the electricity testing module and is connected with the alarm to convert the charge detected by the detector head into an acousto-optic signal, the signal generator comprises a transmitter, the transmitter is connected with the detector head through a control circuit, the control circuit converts the charge into a charged signal, the charged signal is transmitted to a signal receiver through the transmitter, the signal receiver comprises a receiver and a power supply, and the receiver receives and identifies the charged signal through the control circuit and is used for receiving and identifying the charged signal and driving the indicator lamp to emit warning light; the ground wire detection module comprises an insulation resistance tester, a metal contact, an internal battery and an alarm; the insulation resistance tester utilizes a pulse width modulation circuit to generate direct current high voltage, a linear ammeter is used for displaying and measuring, if a detected line is provided with a grounding wire, the detection device displays a high-resistance value and gives out a warning sound, and if the detected line is not provided with the grounding wire, the detection device displays infinite resistance value; the metal contact is connected with the L end of the insulation resistance tester, the E end of the insulation resistance tester is connected with the grounding ring, and the G end of the insulation resistance tester is connected with the shielding ring; the DC high voltage generated by DC/DC conversion of the built-in battery as a power supply is output from the E pole and passes through the tested object to the L pole, so that a current from the E pole to the L pole is generated, and the electrified signal is received and identified through the control circuit.
2. The remote control distribution network electricity testing and ground wire detecting device of claim 1, wherein: the alarm comprises a buzzer for sounding alarm and an alarm lamp for emitting light alarm, wherein the buzzer and the alarm lamp are respectively connected with the control circuit.
3. The remote control distribution network electricity testing and ground wire detecting device of claim 1, wherein: the automatic background comprises a signal processing device and a signal control device.
4. The remote control distribution network electricity testing and ground wire detecting device of claim 3, wherein: the signal processing device comprises a signal input unit, a signal output unit, a signal processing unit and a communication cable.
5. The remote control distribution network electricity testing and ground wire detecting device of claim 4, wherein: the signal output unit receives a control signal of the remote control unit and respectively controls the opening and closing of the intelligent detection device, and the signal input unit processes information transmitted from the intelligent detection device; the detection information is converted into a control signal through the signal processing unit and is sent to the control part; and finally, outputting the signal to an automatic background through a communication cable.
6. The remote control distribution network electricity testing and ground wire detecting device of claim 3, wherein: the signal control device comprises a signal input unit, a signal control unit, a control signal output unit and a control cable; the operating signal is transmitted to the control unit through the control cable, and remote control operation is carried out on the device; and after the successful operation, the operation is transmitted to the control signal output unit to complete the control process.
CN201710642399.7A 2017-07-31 2017-07-31 Remote control distribution network electricity testing and grounding wire detection device CN107247177B (en)

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CN107247177B true CN107247177B (en) 2020-05-19

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