CN207882335U - A kind of UHV transmission line non-contact type electricity checking system - Google Patents

Abstract

The utility model discloses a non-contact electric inspection system for UHV transmission lines. The system includes: an electric field detection device and a hand-held device. The electric field detection device includes: a signal acquisition unit for collecting electric field signals, acquiring Electric field current signal; signal processing unit, for converting the electric field current signal into an electric field voltage signal; core processing unit, for comparing the electric field voltage signal with a preset alarm threshold, and when the electric field voltage signal is greater than In the case of the preset alarm threshold, an alarm command is sent to the alarm unit; the handheld device is used to carry the electric field detection device. The utility model combines the electric field detection device with the insulating telescopic rod, the structure is light and handy, easy to operate, and the interference of environmental factors can be avoided when the electricity is checked at the position of the tower body, the operation is simple and easy, and the measurement result display device is added at the same time, It is convenient for the operator to obtain the electric test result clearly and reliably.

Description

A non-contact electrical inspection system for UHV transmission lines

technical field

The utility model relates to the technical field of electric field measurement of UHV transmission lines, and more specifically relates to a non-contact electric inspection system for UHV transmission lines.

Background technique

In the maintenance work of high-voltage transmission lines and high-voltage substation equipment, it is necessary to check whether they are charged in advance to prevent accidents. At present, there are two main types of power inspection devices for transmission lines:

The first is the direct contact electroscope, which uses a capacitive electroscope on a long rod to directly contact the live parts of the equipment for electric inspection. It detects the capacitive current of the electric current experience device and uses lights and buzzers as alarm signals. The direct contact capacitive electroscope is used, although the reliability is high, but the length of the insulating rod used for operation also increases with the increase of the voltage level. The electric test method of directly contacting the charged body through a long insulating rod, for 500kV There are problems such as unsuitable for carrying and inconvenient to use for electric testing of voltage levels above and above.

The second is the non-contact electroscope, which includes: ultraviolet pulse method induction electroscope, ultra-high frequency partial discharge induction electroscope, electromagnetic induction electroscope and ground electric field induction electroscope. Ultraviolet, partial discharge, and electromagnetic induction electrometry are obviously affected by factors such as the environment, weather, and line operation status, and the measurement accuracy is not enough. The non-contact electroscope at home and abroad uses the principle of measuring the ground induced electric field to conduct electric inspection, which is easily affected by the arrangement of transmission wires, surrounding lines, iron towers and other objects. There are measurement errors and blind areas when measuring the ground below the wires, and the scope of application is limited. , Strict conditions of use, complicated operation, poor anti-interference, and false alarms of power outages, etc., most of them have been discontinued.

Therefore, there is a need for a non-contact electrical inspection system for UHV transmission lines, which can ensure the accuracy of electrical inspection for UHV transmission lines and solve the problem of electrical inspection for UHV transmission lines.

Contents of the invention

The utility model provides a non-contact electric inspection system for ultra-high voltage transmission lines to solve the problem of inaccurate and inconvenient electric inspection for existing ultra-high voltage transmission lines.

In order to solve the above problems, the utility model provides a non-contact electrical inspection system for UHV transmission lines. The system includes: a connected electric field detection device and a handheld device. The electric field detection device includes: a signal acquisition unit, a signal processing unit, core processing unit and alarm unit,

The signal acquisition unit is connected to the input terminal of the signal acquisition and processing unit, and is used to collect the electric field signal, obtain the electric field current signal, and send the electric field current signal to the signal processing unit;

The signal processing unit is connected to the input terminal of the core processing unit, and is used to convert the electric field current signal into an electric field voltage signal, and send the electric field voltage signal to the core processing unit;

The core processing unit is connected to the input terminal of the alarm unit, and is used to compare the electric field voltage signal with a preset alarm threshold, and when the electric field voltage signal is greater than the preset alarm threshold, , sending an alarm command to the alarm unit;

The alarm unit is configured to issue an alarm according to the alarm instruction;

The handheld device is used to carry the electric field detection device.

Preferably, the signal acquisition unit includes: a MEMS electric field sensor probe, a signal amplification module, and a signal acquisition module, for using the MEMS electric field sensor probe to sense an electric field signal, and amplifying the electric field current signal using a signal amplification module Afterwards, the electric field current signal is obtained through the signal acquisition module.

Preferably, the electric field detection device further includes: a data transmission unit, a display unit, an interface unit and a power supply unit,

The data transmission unit is used to convert the electric field voltage signal into serial port data and then display it through the display unit;

The interface unit is used to communicate with external devices;

The power supply unit is used to provide power support for the alarm unit.

Preferably, the alarm unit is an audible and visual alarm circuit.

Preferably, the preset alarm threshold is 25kV/m.

Preferably, the handheld device includes: a handle, an insulating telescopic rod and a display device,

Wherein, one end of the insulating telescopic rod is connected to the handle, the other end of the insulating telescopic rod is provided with the electric field detection device, the display device is provided on the insulating rod provided with the electric field detection device, the The display device is used for communicating with the electric field detection device through the interface unit, receiving and displaying the electric field voltage signal.

The utility model provides a non-contact electric inspection system for UHV transmission lines, which uses a hand-held device to control the position of an electric field detection device to detect electric field signals, and sends an alarm when the electric field voltage signal is greater than the preset alarm threshold command, and make an alarm. During the whole process, the operator reads the electric field voltage signal through the display device of the handheld device to judge the liveliness of the line. The electric inspection system based on the MEMS electric field sensor probe and the subsequent signal processing circuit can accurately measure the electric field signal and give an indication signal of the electric inspection result, which is more accurate and reliable. By combining the electric field detection device with the insulating telescopic rod, its structure is light and handy, and it is easy to operate. The staff only need to carry the electric field detection system to the tower and place the electric field detection device of the electric detection system in the detection area. , can avoid the interference of environmental factors, the operation is simple and easy, and the measurement result display equipment is added at the same time, which is convenient for the operator to obtain the electric test result clearly and reliably.

Description of drawings

A more complete understanding of the exemplary embodiments of the present invention may be obtained by referring to the following drawings:

FIG. 1 is a schematic structural diagram of a non-contact electrical inspection system 100 for UHV transmission lines according to an embodiment of the present invention;

Fig. 2 is the schematic diagram of the MEMS electric field sensor probe according to the utility model embodiment;

3 is a schematic diagram of an electric field detection device of a non-contact electrometry system for UHV transmission lines according to an embodiment of the present invention;

4 is a schematic diagram of a handheld device according to an embodiment of the present invention; and

Fig. 5 is a schematic diagram of an electric inspection of an UHV transmission line according to an embodiment of the present invention.

Detailed ways

Exemplary embodiments of the present invention are now described with reference to the accompanying drawings; however, the present invention may be implemented in many different forms and are not limited to the embodiments described herein, which are provided for exhaustive and complete The utility model is disclosed and fully conveys the scope of the utility model to those skilled in the art. The terms used in the exemplary embodiments shown in the drawings do not limit the present invention. In the figures, the same units/elements are given the same reference numerals.

Unless otherwise specified, the terms (including scientific and technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it can be understood that terms defined by commonly used dictionaries should be understood to have consistent meanings in the context of their related fields, and should not be understood as idealized or overly formal meanings.

FIG. 1 is a schematic structural diagram of a non-contact electrical inspection system 100 for UHV transmission lines according to an embodiment of the present invention. As shown in Figure 1, the UHV transmission line non-contact electrical inspection system provided by the embodiment of the utility model, the UHV transmission line non-contact electrical inspection system provided by the embodiment of the utility model, uses a handheld device to control the electric field detection device The position of the electric field signal is detected, and when the electric field voltage signal is greater than the preset alarm threshold, an alarm command is sent to issue an alarm. During the whole process, the operator only needs to carry the electrometry system to the tower and place the electric field detection device of the electrometry system in the detection area, and read the electric field voltage signal through the display device of the handheld device to judge the liveliness of the line. By combining the electric field detection device with the insulating telescopic rod, the structure is light and handy, and it is easy to operate, and the interference of environmental factors can be avoided when the electricity is tested at the tower body, and the operation is simple and easy. At the same time, the measurement result display equipment is added to facilitate the operators Clear and reliable access to electrical inspection results. The non-contact electrical inspection system 100 for UHV transmission lines provided by the embodiment of the present utility model includes: an electric field detection device 101 and a handheld device 102 connected to each other. Wherein, the electric field detection device 101 includes: a signal acquisition unit 1011 , a signal processing unit 1012 , a core processing unit 1013 and an alarm unit 1014 . The handheld device 102 includes: a handle 1021 , an insulating telescopic rod 1022 and a display device 1023 .

Preferably, the signal acquisition unit 1011 is connected to the input terminal of the signal acquisition and processing unit, and is used for collecting the electric field signal, obtaining the electric field current signal, and sending the electric field current signal to the signal processing unit.

Preferably, the signal acquisition unit includes: a MEMS electric field sensor probe, a signal amplification module, and a signal acquisition module, for using the MEMS electric field sensor probe to sense an electric field signal, and amplifying the electric field current signal using a signal amplification module Afterwards, the electric field current signal is obtained through the signal acquisition module. The utility model adopts the MEMS electric field sensor probe to detect the space electric field around the transmission line, and the detection accuracy is high, and it is not affected by factors such as environment, weather, line structure and the like.

Fig. 2 is a schematic diagram of a MEMS electric field sensor probe according to an embodiment of the present invention. As shown in Figure 2, in the embodiment of the present utility model, the built-in movable electrode vibrates at a certain frequency, and the induction electrode generates an induced voltage due to the action of the electric field, thereby forming a characteristic electrical signal at the output terminal and transmitting it to the subsequent processing circuit . The specific working principle is: the shielding electrode of the electric field sensor probe and the positive and negative sensing electrodes are both conductive polysilicon materials. When the shielding electrode vibrates to the right, the positive sensing electrode will be partially exposed to the external electric field, and the induced charge on the positive sensing electrode will be At the same time, the shielding electrode will cover part of the area of the negative sensing electrode, and the induced charge on the negative sensing electrode will decrease. When the shielding electrode vibrates periodically, the positive and negative sensing electrodes will generate induction currents with the same size and opposite directions.

Preferably, the signal processing unit 1012 is connected to the input terminal of the core processing unit, and is used for converting the electric field current signal into an electric field voltage signal, and sending the electric field voltage signal to the core processing unit.

Preferably, the core processing unit 1013 is connected to the input terminal of the alarm unit, and is used to compare the electric field voltage signal with a preset alarm threshold, and when the electric field voltage signal is greater than the preset alarm threshold, In the case of the threshold value, an alarm instruction is sent to the alarm unit. Preferably, the preset alarm threshold is 25kV/m.

Preferably, the alarm unit 1014 is configured to issue an alarm according to the alarm instruction.

Preferably, the electric field detection device further includes: a data transmission unit, a display unit, an interface unit and a power supply unit. The data transmission unit is used to convert the electric field voltage signal into serial port data and display it through the display unit; the interface unit is used to communicate with external devices; the power supply unit is used to provide power for the alarm unit support.

Preferably, the alarm unit is an audible and visual alarm circuit.

Fig. 3 is a schematic diagram of an electric field detection device of a non-contact electrical inspection system for UHV transmission lines according to an embodiment of the present invention. As shown in Figure 3, the electric field detection device of the utility model embodiment comprises: MEMS electric field sensor probe, sensor signal acquisition module, sensor signal processing module, CPU, 232 distributors, 232 data transmission units (DataTerminal unit, DTU), power supply Module, lithium battery, indicator light, switch, high-brightness alarm light, high-decibel buzzer, reserved interface and reserved wireless transceiver interface. In the embodiment of the present utility model, the MEMS electric field sensor probe is used to sense the electric field signal, and the positive and negative charges are induced on the sensing electrode inside the sensor, and the alternating current signal is formed through continuous charging and discharging, and the electric field current signal is collected by the acquisition module, and The voltage/current conversion is performed by the signal processing module, converted into an electric field voltage signal and sent to the CPU for processing, the CPU reads the electric field voltage signal, and compares the electric field voltage signal with a preset alarm threshold, the electric field voltage signal In the case of greater than the preset alarm threshold, an alarm instruction is sent to the alarm unit.

In order to make the alarm prompt more obvious and suggestive, the alarm unit of the above-mentioned electric field detection device is an audible and visual alarm circuit, which can be alarmed by light-emitting diodes or buzzers or a combination of the two to achieve Promptly and clearly remind staff of the purpose. When the electric field voltage signal is greater than the preset alarm threshold, the high-brightness alarm lamp of the sound and light alarm circuit emits light and the high-decibel buzzer sounds; when the electric field voltage signal is smaller than the preset alarm threshold, the sound and light alarm circuit does not respond.

232DTU, used to convert the measured electric field voltage signal into serial data for display.

The reserved interface and wireless transceiver interface are mainly to leave a structure for the development of subsequent advanced functions. At present, there is no communication object, but it can be reserved, such as communication with Beidou satellite positioning.

Preferably, the handheld device 102 is used to carry the electric field detection device 101 .

Preferably, the handheld device includes: a handle, an insulating telescopic rod and a display device,

Wherein, one end of the insulating telescopic rod is connected to the handle, the other end of the insulating telescopic rod is provided with the electric field detection device, the display device is provided on the insulating rod provided with the electric field detection device, the The display device is used for communicating with the electric field detection device through the interface unit, receiving and displaying the electric field voltage signal.

Fig. 4 is a schematic diagram of a handheld device according to an embodiment of the present invention. As shown in Figure 4, the handheld device according to the embodiment of the utility model includes: three insulating rods, the diameters of the third insulating rod, the second insulating rod, and the first insulating rod are successively reduced. The handheld device is shortened for easy portability. The display device is at the end close to the handle, and the display device also includes a bluetooth communication function. The electric field detection device is connected with the first insulating rod.

Fig. 5 is a schematic diagram of an electric inspection of an UHV transmission line according to an embodiment of the present invention. As shown in Figure 5, when conducting electrical inspections on UHV transmission lines, the preset alarm threshold of the electric field detection device is set, and the staff carry the electrical inspection system to the tower to the appropriate position, and extend the insulating rod of the handheld device to point to the wires , the electric field detection device detects the electric field signal, and judges the charged condition of the wire, and displays the electric test result through the display device. After the inspection is completed, the operator retracts the insulating rod to complete the electrical inspection.

The invention has been described with reference to a small number of embodiments. However, as is well known to those skilled in the art, as defined by the appended patent claims, other embodiments than those disclosed above equally fall within the scope of the present invention.

Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise therein. All references to "a/the/the [means, component, etc.]" are openly construed to mean at least one instance of said means, component, etc., unless expressly stated otherwise. The steps of any method disclosed herein do not have to be performed in the exact order disclosed, unless explicitly stated.

Claims (6)

1. a kind of UHV transmission line non-contact type electricity checking system, which is characterized in that the system comprises：The electric field being connected Detection device and hand-held device, the electric field detector include：Signal gathering unit, signal processing unit, core processing list Member and alarm unit,

The signal gathering unit is connected with the input terminal of the signal acquisition process unit, for being carried out to electric field signal Acquisition obtains field current signal, and the field current signal is sent to signal processing unit；

The signal processing unit is connected with the input terminal of the core processing unit, is used for the field current signal It is converted into voltage of electric field signal, and the voltage of electric field signal is sent to core processing unit；

The core processing unit is connected with the input terminal of the alarm unit, for by the voltage of electric field signal and in advance If alarm threshold value is compared, and in the case where the voltage of electric field signal is more than the preset alarm threshold value, to the report Alert unit sends alarm command；

The alarm unit, for being alarmed according to the alarm command；

The hand-held device, for carrying the electric field detector.

2. system according to claim 1, which is characterized in that the signal gathering unit includes：MEMS electric-field sensors Probe, signal amplification module and signal acquisition module, for utilizing MEMS electric-field sensors probe induction field signal, and By signal acquisition module after the field current signal is amplified using signal amplification module, field current letter is obtained Number.

3. system according to claim 1, which is characterized in that the electric field detector further includes：Data transmission unit, Display unit, interface unit and power supply unit,

The data transmission unit is shown after serial data for being converted to voltage of electric field signal by display unit；

The interface unit, for being communicated with external equipment；

The power supply unit, for providing power supply support for the alarm unit.

4. system according to claim 1, which is characterized in that the alarm unit alarm unit is sound light alarming circuit.

5. system according to claim 1, which is characterized in that the preset alarm threshold value is：25kV/m.

6. system according to any one of claim 1 to 5, which is characterized in that the hand-held device includes：Handle, absolutely Edge telescopic rod and display equipment,

Wherein, one end of the insulated telescopic rods is connect with the handle, and the electricity is arranged in the other end of the insulated telescopic rods Field detecting device, the display equipment are set on the insulating bar for being provided with the electric field detector, and the display equipment is used It is communicated, receive voltage of electric field signal and is shown in by interface unit and electric field detector.