CN203929985U - The ultrasonic positioner of the withstand voltage breakdown fault of a kind of GIS - Google Patents

Abstract

The utility model discloses an ultrasonic positioning device for a GIS pressure-resistant breakdown fault. The ultrasonic signals are collected by a plurality of ultrasonic sensors installed on the cavity shell of the GIS interval air chamber, and the ultrasonic signals are filtered and amplified by a signal processing module. A After /D conversion, it is output to the data analysis module. When the processed signal meets the preset conditions, it is judged that the position of the ultrasonic sensor that collects the ultrasonic signal is the suspected fault position; by first judging the position of the detection point with the largest signal amplitude, and then Judging whether the difference between the signal duration of the position and the signal duration of the adjacent detection point is within the preset range to determine whether the point is a suspected fault location, that is, the suspected fault location can be judged only by one ultrasonic signal acquisition, to avoid The problem of causing insulation damage to normal GIS parts caused by adopting the solutions in the prior art is solved.

Description

An Ultrasonic Positioning Device for GIS Pressure Breakdown Fault

technical field

The utility model relates to the field of fault location, in particular to an ultrasonic location device for GIS voltage breakdown faults.

Background technique

Gas Insulated Switchgear (GIS) refers to gas-insulated metal-enclosed switchgear with SF6 as the insulating medium, also known as closed combined electrical equipment, which has a small footprint, compact space, and is not affected by the external environment. With the advantages of high reliability, it has a tendency to replace conventional substations.

As a handover test item, the GIS on-site withstand voltage test is to check whether there is any hidden trouble in the process of dismantling, packaging, transportation and on-site installation of GIS equipment, and to verify whether its insulation performance is intact. , poor process control and other factors in the process of transportation, etc.,

GIS breakdown failure will occur in the withstand voltage process.

Therefore, locating the fault location has become an urgent problem to be solved.

At present, the commonly used method of locating the fault location is to find the fault point by switching the state of the switch and withstand voltage for many times, but this method is easy to cause insulation damage to the normal GIS part.

Utility model content

In view of this, the utility model provides an ultrasonic positioning device for GIS withstand voltage breakdown faults to solve the problem in the prior art that it is easy to cause insulation damage to normal GIS parts and cause unnecessary losses. The specific scheme is as follows:

An ultrasonic positioning device for a GIS withstand voltage breakdown fault, comprising:

A plurality of ultrasonic sensors installed on the cavity casing of the GIS compartment air chamber of the gas-insulated combined electrical equipment, the ultrasonic sensors collect and output ultrasonic signals;

A signal processing module connected to the ultrasonic sensor, the signal processing module performs filter amplification processing and A/D conversion on the ultrasonic signal transmitted by the ultrasonic sensor, and outputs the processed ultrasonic signal;

A data analysis module connected to the signal processing module, the data analysis module judges whether the processed ultrasonic signal sent by the signal processing module satisfies a preset condition, and if so, determines the location of the ultrasonic sensor that collects the ultrasonic signal is the suspected fault location,

Wherein, the preset condition is that the difference between the signal duration of the detection point with the largest signal amplitude of the ultrasonic signal and the signal duration of the detection point adjacent to the ultrasonic sensor is within a predetermined range.

Further, it also includes: a wireless communication module respectively connected to the signal processing module and the data analysis module,

The signal processing module sends the processed ultrasonic signal to the wireless communication module through the radio frequency radiation antenna, and the wireless communication module sends the processed ultrasonic signal to the data analysis module.

Further, a coupling agent is applied on the ultrasonic sensor.

Further, the positions of the plurality of ultrasonic sensors are arranged according to the number of gas chambers and the number of ultrasonic sensors in the GIS withstand voltage test area.

Further, it includes: setting an ultrasonic sensor outside each GIS compartment air chamber.

Further, it also includes: setting an ultrasonic sensor every 5-7m on the bus.

Further, the predetermined range is within ±10%.

Further, the signal processing module includes:

A filtering and amplifying unit connected to the ultrasonic sensor for filtering and amplifying the received ultrasonic signal;

An A/D conversion unit that performs digital-to-analog conversion on the filtered and amplified ultrasonic signal is respectively connected to the filtering and amplifying unit and the data analysis module.

Further, the wireless communication module includes:

A wireless transmission module that is connected to the signal processing module through a radio frequency radiation antenna, receives the signal sent by the signal processing module and outputs it;

The wireless receiving module connected with the wireless transmission module through a radio frequency radiation antenna, receives the signal sent by the wireless transmission module, and transmits the received signal to the data analysis module.

Further, the wireless receiving module is set on the data analysis module.

It can be seen from the above technical scheme that the ultrasonic positioning device for GIS pressure breakdown fault disclosed by the utility model collects ultrasonic signals through a plurality of ultrasonic sensors installed on the cavity shell of the GIS spaced air chamber, and passes through the signal processing module After the filter amplification processing and A/D conversion, it is output to the data analysis module. When the processed signal meets the preset condition, it is judged that the position of the ultrasonic sensor that collects the ultrasonic signal is the suspected fault location. The preset condition is the ultrasonic signal The difference between the signal duration of the detection point with the largest signal amplitude and the signal duration of the adjacent ultrasonic sensor detection point is within a preset range. This scheme judges whether the point is a suspected fault location by first judging the location of the detection point with the largest signal amplitude, and then judging whether the difference between the signal duration of the location and the signal duration of the adjacent detection point is within the preset range, that is, The location of the suspected fault can be judged only by acquiring the ultrasonic signal once, which avoids the problem of causing insulation damage to normal GIS parts caused by the solution in the prior art.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a structural schematic diagram of an ultrasonic positioning device for a GIS withstand voltage breakdown fault disclosed in an embodiment of the present invention;

Fig. 2 is a structural schematic diagram of an example of an ultrasonic positioning device for a GIS withstand voltage breakdown fault disclosed in an embodiment of the present invention;

Fig. 3 is a schematic structural diagram of an ultrasonic positioning device for a GIS withstand voltage breakdown fault disclosed by an embodiment of the utility model.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

This embodiment discloses an ultrasonic locating device for a GIS withstand voltage breakdown fault, its structural schematic diagram is shown in Figure 1, including:

An ultrasonic sensor 11 , a signal processing module 12 connected to the ultrasonic sensor 11 , and a data analysis module 13 connected to the signal processing module 12 .

The ultrasonic sensor 11 is installed on the cavity shell of the gas-insulated combined electrical equipment (GAS INSULATESWITCHGEAR, GIS). There can be multiple ultrasonic sensors 11, and each one is arranged according to the number of gas chambers and the number of ultrasonic sensors in the GIS withstand voltage test area. The position of the ultrasonic sensor 11. Preferably, one ultrasonic sensor is arranged outside each GIS compartment air chamber, and one ultrasonic sensor is arranged every 5-7m on the bus.

The ultrasonic sensor 11 collects an ultrasonic signal, which is an ultrasonic signal emitted by a breakdown fault during the GIS withstand voltage test, and outputs the collected ultrasonic signal to the signal processing module 12 .

The signal processing module 12 performs filter amplification processing and A/D conversion to the ultrasonic signals transmitted by a plurality of ultrasonic sensors 11, wherein the signal processing module 12 includes: a filter amplification unit, an A/D conversion unit, and the filter amplification unit is used for receiving ultrasonic waves. The signal is filtered and amplified, and the A/D conversion unit is used to realize analog-to-digital conversion, and the converted signal is sent to the data analysis module 13 .

The data analysis module 13 judges whether the processed ultrasonic signal sent by the signal processing module 12 satisfies the preset condition, and if so, determines that the location of the ultrasonic sensor 11 collecting the ultrasonic signal is a suspected fault location.

The data analysis module 13 obtains all the ultrasonic signals collected by the ultrasonic sensors 11, and displays, stores and judges all the obtained ultrasonic signals.

Wherein, the preset condition is: the difference between the signal duration of the detection point with the largest signal amplitude of the ultrasonic signal and the signal duration of the detection point of the adjacent ultrasonic sensor is within a predetermined range.

Preferably, the predetermined range may be within ±10%.

That is, when the ultrasonic signal collected by a certain ultrasonic sensor is the signal with the largest amplitude among all ultrasonic signals, and the difference between the signal duration of the ultrasonic signal and the duration of the detection point of the adjacent ultrasonic sensor is within a predetermined range, then the ultrasonic sensor is located The detection point is the suspected fault location.

Figure 2 is a structural diagram of a substation 550kV GIS on-site fault location example under AC withstand voltage. The dots 1-8 in the figure indicate the layout position of the ultrasonic sensor, and the signal of each ultrasonic sensor at the moment of withstand voltage breakdown fault is shown in the figure indicated by the arrow.

First of all, it can be known from analyzing the amplitude of ultrasonic signals that the amplitudes of ultrasonic sensors 4, 5, and 6 have all exceeded the maximum range, and the signal amplitudes of other ultrasonic sensors increase with the signal amplitudes of ultrasonic sensors 4, 5, and 6. increase and decrease

In addition, the difference between the signal duration of ultrasonic sensor 4 and 3 is about 15%, greater than 10%, the signal duration of ultrasonic sensor 6 is compared with 7, the difference between the two is also greater than 10%, and Compared with 4 and 6, the difference of signal duration is within 10%.

Therefore, it can be determined that the position where the ultrasonic sensor 5 is located is a suspected fault position.

The ultrasonic positioning device for GIS pressure breakdown fault disclosed in this embodiment collects ultrasonic signals through a plurality of ultrasonic sensors installed on the cavity shell of the GIS spaced air chamber, and passes through the filtering and amplification processing of the signal processing module, A/D After the conversion, it is output to the data analysis module. When the processed signal meets the preset conditions, it is judged that the location of the ultrasonic sensor that collects the ultrasonic signal is a suspected fault location. The preset condition is the detection point where the signal amplitude of the ultrasonic signal is the largest. The difference between the duration of the signal and the duration of the signal at the detection point of the adjacent ultrasonic sensor is within a preset range. This scheme judges whether the point is a suspected fault location by first judging the location of the detection point with the largest signal amplitude, and then judging whether the difference between the signal duration of the location and the signal duration of the adjacent detection point is within the preset range, that is, The location of the suspected fault can be judged only by acquiring the ultrasonic signal once, which avoids the problem of causing insulation damage to normal GIS parts caused by the solution in the prior art.

This embodiment discloses an ultrasonic locating device for a GIS withstand voltage breakdown fault, its structural schematic diagram is shown in Figure 3, including:

An ultrasonic sensor 31 , a signal processing module 32 connected to the ultrasonic sensor 31 , a wireless communication module 33 connected to the signal processing module, and a data analysis module 34 connected to the wireless communication module 33 .

In addition to the same structure as the previous embodiment, this embodiment also adds a wireless communication module 33 .

The signal processing module 32 sends the processed ultrasonic signal to the wireless communication module 33 through the radio frequency radiation antenna, and the wireless communication module 33 sends the received ultrasonic signal to the data analysis module 34, and the signal is analyzed and processed by the data analysis module 34 to obtain Determine the location of the suspected faulty air chamber.

Wherein, the wireless communication module 33 includes: a wireless transmission module and a wireless receiving module.

The wireless transmission module is connected to the signal processing module 32 through the radio frequency radiation antenna, receives the signal sent by the signal processing module 32, and outputs it;

The wireless receiving module is connected with the wireless transmission module through the radio frequency radiation antenna, receives the signal sent by the wireless transmission module, and transmits the received signal to the data analysis module 34 .

Preferably, the wireless receiving module is arranged on the data analysis module 34 to facilitate wired transmission of data.

The ultrasonic positioning device for GIS withstand voltage breakdown faults disclosed in this embodiment implements signal transmission through a wireless communication module, realizes fast and accurate signal transmission, and avoids the inconvenience caused by wired transmission.

Preferably, in the ultrasonic location device for GIS pressure breakdown fault disclosed in this embodiment, an appropriate amount of coupling agent is applied on the ultrasonic sensor 31 to remove the air between the fault location and the ultrasonic sensor, so that the ultrasonic wave can effectively enter the fault location , to achieve the detection purpose.

Each embodiment in this specification is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other. As for the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and for the related information, please refer to the description of the method part.

The above description of the disclosed embodiments enables those skilled in the art to realize or use the utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. a ultrasonic positioner for the withstand voltage breakdown fault of GIS, is characterized in that, comprising:

Be installed on the multiple ultrasonic sensors on the shell cavity of gas insulated combined electric appliance equipment GIS interval air chamber, described ultrasonic sensor gathers ultrasonic signal output;

With the signal processing module that described ultrasonic sensor is connected, described signal processing module carries out filter amplifying processing and A/D conversion to the ultrasonic signal of described ultrasonic sensor transmission, and ultrasonic signal after treatment is exported;

The data analysis module being connected with described signal processing module, described data analysis module judges whether the ultrasonic signal after treatment that described signal processing module sends meets pre-conditioned, if meet, the ultrasonic sensor position of judging the described ultrasonic signal of collection is doubtful abort situation

Wherein, differ in preset range with the signal duration of contiguous ultrasonic sensor check point the signal duration of the check point of the described pre-conditioned signal amplitude maximum for ultrasonic signal.

2. device according to claim 1, is characterized in that, also comprises: the wireless communication module being connected respectively with described signal processing module and data analysis module,

Described signal processing module is sent to wireless communication module by radio-frequency radiation antenna by described ultrasonic signal after treatment, and described ultrasonic signal after treatment is sent to data analysis module by described wireless communication module.

3. device according to claim 1, is characterized in that, daubing coupling agent on described ultrasonic sensor.

4. device according to claim 1, is characterized in that, the position of described multiple ultrasonic sensors arranges according to the air chamber number in GIS withstand voltage test region and the number of ultrasonic sensor and arranges.

5. device according to claim 4, is characterized in that, comprising: each GIS interval air chamber arranges a ultrasonic sensor outward.

6. device according to claim 5, is characterized in that, also comprises: on bus, every 5-7m arranges a ultrasonic sensor.

7. device according to claim 1, is characterized in that, described preset range is in ± 10%.

8. device according to claim 1, is characterized in that, described signal processing module comprises:

Be connected with described ultrasonic sensor, the ultrasonic signal receiving carried out to the filter and amplification unit of filter and amplification;

Be connected respectively with described filter and amplification unit and data analysis module, the A/D converting unit that the ultrasonic signal after described amplification is after filtering carried out to digital-to-analog conversion.

9. device according to claim 2, is characterized in that, described wireless communication module comprises:

Be connected by radio-frequency radiation antenna with described signal processing module, receive the also wireless transport module of output of signal that described signal processing module sends;

Be connected by radio-frequency radiation antenna with described wireless transport module, receive the signal that described wireless transport module sends, and the described signal receiving is transferred to the wireless receiving module of data analysis module.

10. device according to claim 9, is characterized in that, described wireless receiving module is arranged on described data analysis module.