CN211180069U - GI L fault positioning system based on ultrasonic wave and geoelectric wave technology - Google Patents

Abstract

The utility model discloses a GI L fault location system based on ultrasonic wave and earth electric wave technique contains a plurality of sensors, every sensor is attached at GI L's barrel surface for gather ultrasonic signal and instantaneous overvoltage signal, a plurality of signal acquisition devices, every signal acquisition device is with a plurality of the sensor links to each other, is used for acquireing and handles the signal that the sensor gathered, the surveillance center with signal acquisition device passes through internet access, is used for analysis and processing the signal that signal acquisition device acquireed, the utility model discloses utilize ultrasonic monitoring and earth electric wave monitoring technique's combination, promoted monitoring signal's stability and accuracy greatly, can the graphical display signal information to can in time report to the police and fix a position, improved the security of electric power operation.

Description

GI L fault positioning system based on ultrasonic wave and geoelectric wave technology

Technical Field

The utility model relates to a power system transmission equipment operation safety monitoring technique, in particular to GI L fault location system based on ultrasonic wave and ground electric wave technique.

Background

The insulation faults of gas insulated pipeline bus (GI L, gas insulated line) equipment mainly include defects of insulation support, surface dirt, internal foreign matters, spikes, abnormal gas pressure and the like.

The arc measurement method is to monitor discharge arc light and perform positioning based on discharge electromagnetic wave pulses, but requires a hole in the case, which destroys the original structure of GI L, and also makes an arc signal generated by flashover susceptible to the body structure, and makes it impossible to recognize an early partial discharge signal although sensitivity is high.

The pulse current method needs to lead the grounding wire of the GI L body to pass through the current sensor, so that the field installation is troublesome, and the field GI L adopts multipoint grounding, so that the measuring signal of each sensor is extremely weak, the signal frequency band is low, and the interference of field corona and power frequency is easy to happen.

The ultrahigh frequency measurement method is characterized in that an electromagnetic wave signal generated by partial discharge is monitored, positioning is carried out according to a discharge electromagnetic wave pulse, a hole needs to be formed in a shell or an exposed insulating basin needs to be arranged, the original structure of GI L is damaged, the distribution of a field in the shell is influenced, potential hazards of insulating and sealing performances exist, and the ultrahigh frequency measurement method cannot be additionally arranged on the existing equipment.

The ultrasonic measurement method monitors by monitoring the sound wave signal generated by partial discharge, carries out positioning according to the discharged sound wave, does not need to open a hole, does not influence the insulation and sealing performance of the GI L body, and has no influence on the distribution of an electric field in the shell, but has short monitoring distance of the sensor due to large attenuation of sound wave transmission, and the effective measuring distance is only less than 10 meters.

Disclosure of Invention

According to the embodiment of the utility model provides a GI L fault location system based on ultrasonic wave and geoelectric wave technique contains:

the sensors are attached to the outer surface of the cylinder body of the GI L and used for acquiring ultrasonic signals and instantaneous overvoltage signals;

each signal acquisition device is connected with a plurality of sensors and is used for acquiring and processing signals acquired by the sensors;

and the monitoring center is connected with the signal acquisition device through a network and is used for analyzing and processing the signals acquired by the signal acquisition device.

The sensor further comprises a sucker, and the sensor is attached to the outer surface of the cylinder of the GI L through the sucker.

Further, the sensor further comprises an elastic seat, wherein the elastic seat is arranged between the sensor and the GI L, and the elastic seat is connected with a flange of the GI L and used for fixing the sensor.

Furthermore, the distance between the adjacent sensors attached to the GI L is 10-36 m.

Further, each signal acquisition device is connected with 3 sensors, and 3 sensors respectively acquire GI L three-phase ultrasonic wave signals and instantaneous overvoltage signals.

Furthermore, the frequency range of the ultrasonic signals collected by the sensor is 20 KHz-200 KHz, and the frequency range of the collected instantaneous overvoltage signals is 3 MHz-100 MHz.

Further, the signal acquisition device is connected with the sensor through a coaxial shielded cable.

Further, the monitoring center includes:

the graph drawing module draws a signal oscillogram and a statistical chart according to the signals acquired by the signal acquisition device;

the display module is used for displaying the oscillogram drawn by the graph drawing module and the signal acquired by the signal acquisition device;

and the alarm positioning module alarms and positions abnormal signals according to the signals acquired by the signal acquisition device.

Further, the information displayed by the display module includes but is not limited to: real-time signal oscillogram, effective wave statistical chart, amplitude time statistical chart and arc fault source positioning position.

According to the utility model discloses GI L fault location system based on ultrasonic wave and earth electric wave technique utilizes ultrasonic wave monitoring and earth electric wave monitoring technique's combination, has promoted monitoring signal's stability and accuracy greatly, can graphically display signal information to can in time report to the police and fix a position, improve the security of electric power operation.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and are intended to provide further explanation of the claimed technology.

Drawings

Fig. 1 is a schematic diagram of a GI L fault location system based on ultrasonic and geoelectric wave technology according to an embodiment of the present invention;

fig. 2 is a schematic block diagram of a GI L fault location system based on ultrasonic and geoelectric wave technology according to an embodiment of the present invention.

Detailed Description

The present invention will be further described with reference to the following detailed description of preferred embodiments thereof, which is to be read in connection with the accompanying drawings.

First, a GI L fault location system based on ultrasonic wave and earth electric wave technology according to the embodiment of the present invention will be described with reference to fig. 1-2, which is used for GI L fault monitoring and has a wide application range.

As shown in fig. 1, the GI L fault location system based on ultrasonic wave and geoelectric wave technology according to the embodiment of the present invention has a plurality of sensors 1, a plurality of signal acquisition devices 2, and a monitoring center 3. in order to better fix the sensors 1, the embodiment of the present invention further includes a suction cup (not shown in the figure) and an elastic seat (not shown in the figure).

Specifically, as shown in fig. 1, each sensor 1 is attached to the outer surface of the cylinder of the GI L, and the installation is very convenient, in this embodiment, the sensor 1 can collect both an ultrasonic signal and an instantaneous overvoltage signal (also called a ground electric wave signal), further, the frequency range of the ultrasonic signal collected by the sensor is 20KHz to 200KHz, and the frequency range of the collected instantaneous overvoltage signal is 3MHz to 100 MHz.

Specifically, as shown in fig. 1, each signal acquisition device 2 is connected with a plurality of sensors 1 through coaxial shielded cables, and is used for acquiring and processing signals acquired by the sensors 1, and signal transmission is safe and reliable, in this embodiment, each signal acquisition device is connected with 3 sensors, and the 3 sensors respectively acquire three-phase ultrasonic signals and instantaneous overvoltage signals of GI L, so that three-phase detection accuracy and synchronization can be ensured.

Specifically, as shown in fig. 1, the monitoring center 3 is connected to the signal acquisition device 2 through a network, and is configured to analyze and process signals acquired by the signal acquisition device 2.

Further, as shown in fig. 2, the monitoring center 3 includes: a graph drawing module 31, a display module 32 and an alarm positioning module 33. The graph drawing module 31 draws a signal oscillogram and a statistical chart according to the signal acquired by the signal acquisition device. The display module 32 is configured to display the oscillogram drawn by the graph drawing module 31 and the signal acquired by the signal acquisition device 2; in this embodiment, the information displayed by the display module 32 includes but is not limited to: real-time signal oscillogram, effective wave statistical chart, amplitude time statistical chart and arc fault source positioning position. The alarm positioning module 33 alarms and positions the abnormal signal according to the signal acquired by the signal acquisition device 2, and realizes a three-in-one monitoring system for signal acquisition, diagnosis and positioning.

Specifically, the sensor 1 is attached to the outer surface of a cylinder body of GI L through a sucking disc, an elastic seat is customized by utilizing a flange of GI L, and the sensor 1 is fixed through a bolt of the flange, so that the sensor is convenient to detach, maintain and install.

When the system works, the sensor 1 collects three-phase ultrasonic signals and instantaneous overvoltage signals of GI L, the signal collection device 2 collects and processes the signals and sends the signals to the monitoring center 3, the graph drawing module 31 draws a signal waveform graph and a statistical graph, the display module 32 displays the signal waveform graph and the statistical graph, and the alarm positioning module 33 gives an alarm and positions the signal if an abnormal signal exists.

Above, having described with reference to fig. 1~2 and having been according to the utility model discloses GI L fault location system based on ultrasonic wave and earth electric wave technique utilizes ultrasonic wave monitoring and earth electric wave monitoring technique's combination, has promoted monitoring signal's stability and accuracy greatly, can graphically display signal information to can in time report to the police and fix a position, improved the security of electric power operation.

It should be noted that, in the present specification, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

While the present invention has been described in detail with reference to the preferred embodiments thereof, it should be understood that the above description should not be taken as limiting the present invention. Numerous modifications and alterations to the present invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be limited only by the attached claims.

Claims (9)

1. A GI L fault location system based on ultrasonic and geoelectric technologies, comprising:

the sensors are attached to the outer surface of the cylinder body of the GI L and used for acquiring ultrasonic signals and instantaneous overvoltage signals;

each signal acquisition device is connected with a plurality of sensors and is used for acquiring and processing signals acquired by the sensors;

and the monitoring center is connected with the signal acquisition device through a network and is used for analyzing and processing the signals acquired by the signal acquisition device.

2. The GI L fault location system based on ultrasonic and geosonic techniques of claim 1, further comprising a suction cup, wherein the sensor is attached to the outer surface of the cylinder of GI L by suction cup.

3. The GI L fault location system based on ultrasonic and geosonic technologies of claim 1 or 2, further comprising an elastic seat disposed between the sensor and GI L, the elastic seat being connected to a flange of GI L for fixing the sensor.

4. The GI L fault location system based on ultrasonic and geoelectric technologies of claim 1, wherein the adjacent sensors attached to GI L are spaced apart by 10-36 meters.

5. The GI L fault location system based on ultrasonic and geoelectric wave technology of claim 1 or 4, wherein each signal acquisition device is connected with 3 sensors, and the 3 sensors respectively acquire GI L three-phase ultrasonic signals and instantaneous overvoltage signals.

6. The GI L fault location system based on ultrasonic and geoelectric wave technology of claim 1 or 4, wherein the frequency range of the ultrasonic signal collected by the sensor is 20 KHz-200 KHz, and the frequency range of the transient overvoltage signal collected is 3 MHz-100 MHz.

7. The GI L fault location system based on ultrasonic and geowave technology of claim 1, wherein the signal acquisition device is connected to the sensor through a coaxial shielded cable.

8. The GI L fault location system based on ultrasonic and geowave technology of claim 1, wherein the monitoring center comprises:

the graph drawing module draws a signal oscillogram and a statistical chart according to the signals acquired by the signal acquisition device;

the display module is used for displaying the oscillogram drawn by the graph drawing module and the signal acquired by the signal acquisition device;

and the alarm positioning module alarms and positions abnormal signals according to the signals acquired by the signal acquisition device.

9. The GI L fault location system based on ultrasonic and geowave technology of claim 8, wherein the information displayed by the display module includes, but is not limited to, real-time signal waveform map, effective waveform statistical map, amplitude time statistical map, and arc fault source location.

Images