CN110716113A - GIL fault positioning system based on ultrasonic wave and earth electric wave technology - Google Patents
GIL fault positioning system based on ultrasonic wave and earth electric wave technology Download PDFInfo
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- CN110716113A CN110716113A CN201911147882.3A CN201911147882A CN110716113A CN 110716113 A CN110716113 A CN 110716113A CN 201911147882 A CN201911147882 A CN 201911147882A CN 110716113 A CN110716113 A CN 110716113A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1209—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing using acoustic measurements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1254—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of gas-insulated power appliances or vacuum gaps
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- General Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Locating Faults (AREA)
- Testing Relating To Insulation (AREA)
- Gas-Insulated Switchgears (AREA)
Abstract
The invention discloses a GIL fault positioning system based on ultrasonic wave and earth electric wave technology, comprising: the sensors are attached to the outer surface of the cylinder body of the GIL 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 invention utilizes the combination of ultrasonic monitoring and earth electric wave monitoring technology, greatly improves the stability and accuracy of monitoring signals, can graphically display signal information, can alarm and position in time, and improves the safety of electric power operation.
Description
Technical Field
The invention relates to a power transmission equipment operation safety monitoring technology of a power system, in particular to a GIL fault positioning system based on ultrasonic wave and geoelectric wave technologies.
Background
Insulation faults of gas insulated pipeline (GIL) equipment are mainly defects of insulation support, surface dirt, internal foreign matters, spikes, gas pressure abnormity and the like. Various insulation defects develop to finally flashover and breakdown, and before an accident happens, the insulation state can be reflected timely by the strength of partial discharge through the partial discharge stage, but in the prior art, the monitoring means aiming at the partial discharge stage are as follows:
the arc measurement method is based on the discharge electromagnetic wave pulse to position by monitoring the discharge arc light, however, a hole needs to be formed in the housing, the original structure of the GIL is destroyed, an arc signal generated by flashover is easily affected by the body structure, and although the sensitivity is high, the arc measurement method cannot identify the early partial discharge signal.
The pulse current method needs to lead the grounding wire of the GIL body to pass through the current sensor, the field installation is troublesome, and the field GIL 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 the GIL is damaged, electric field distribution in the shell is influenced, potential insulation and sealing performance hazards exist, and the ultrahigh frequency measurement method cannot be additionally installed on existing equipment. Meanwhile, the signal attenuation in the shell is greatly influenced by distance and structure, and the cable distance is short due to the fact that the attenuation of the ultrahigh frequency signal by the signal cable outside the shell is high, so that the number of on-site monitoring devices is too large.
The ultrasonic measurement method monitors the sound wave signal generated by monitoring partial discharge, positions according to the discharge sound wave, does not need to open a hole, does not influence the insulation and sealing performance of the GIL body, and does not influence the distribution of an electric field in the shell. However, due to the fact that the attenuation of sound wave transmission is large, the monitoring distance of the sensor is short, and the effective measuring distance is only less than 10 meters.
Disclosure of Invention
According to an embodiment of the present invention, there is provided a GIL fault locating system based on ultrasonic and earth-electric wave technologies, including:
the sensors are attached to the outer surface of the cylinder body of the GIL 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.
Further, the method also comprises the following steps: and the sensor is attached to the outer surface of the cylinder body of the GIL through the sucker.
Further, the method also comprises the following steps: the elastic seat is arranged between the sensor and the GIL and connected with a flange of the GIL to fix the sensor.
Further, the adjacent sensors attached to the GIL are spaced apart by a distance of 10 ~ 36 meters.
Furthermore, each signal acquisition device is connected with 3 sensors, and 3 sensors respectively acquire GIL three-phase ultrasonic 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 GIL fault positioning system based on the ultrasonic wave and geoelectric wave technology, the stability and the accuracy of monitoring signals are greatly improved by combining the ultrasonic wave monitoring technology and the geoelectric wave monitoring technology, the signal information can be graphically displayed, the alarm and the positioning can be timely realized, and the safety of electric power operation is improved.
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 GIL fault location system based on ultrasonic and earth-electric wave techniques in accordance with an embodiment of the present invention;
FIG. 2 is a schematic block diagram of a GIL fault location system based on ultrasonic and earth-electric wave techniques in accordance with an embodiment of the present invention.
Detailed Description
The present invention will be further explained by describing preferred embodiments of the present invention in detail with reference to the accompanying drawings.
First, a GIL fault location system based on ultrasonic and earth-electric wave technologies according to an embodiment of the present invention will be described with reference to fig. 1 ~ 2, which is used for GIL fault monitoring and has a wide application range.
As shown in fig. 1, the GIL fault location system based on ultrasonic and earth-electric wave technology according to the embodiment of the present invention includes a plurality of sensors 1, a plurality of signal acquisition devices 2, and a monitoring center 3. In order to better fix the sensor 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 GIL, 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, so that signal transmission is safe and reliable; in this embodiment, every signal acquisition device connects 3 sensors, 3 the sensor gathers GIL three-phase ultrasonic signal and instantaneous overvoltage signal respectively, can guarantee three-phase detection precision and synchronization.
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 the cylinder body of the GIL through a sucker; utilize GIL's flange, customization elasticity seat, through the bolt fastening sensor 1 of flange, convenient dismantlement maintenance and installation.
When the system works, the sensor 1 collects three-phase ultrasonic signals and instantaneous overvoltage signals of the GIL, the signal collecting 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 if abnormal signals exist, the alarm positioning module 33 gives an alarm and positions the signals.
In the above, with reference to fig. 1 ~ 2, the GIL fault location system based on ultrasonic wave and geoelectric wave technology according to the embodiment of the present invention is described, and by using the combination of ultrasonic wave monitoring and geoelectric wave monitoring technology, the stability and accuracy of monitoring signals are greatly improved, signal information can be graphically displayed, and alarm and location can be performed in time, so that the safety of power operation is improved.
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, it should be understood that the above description should not be taken as limiting the invention. Various modifications and alterations to this invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be determined from the following claims.
Claims (9)
1. A GIL fault location system based on ultrasonic and earth-electric wave technology, comprising:
the sensors are attached to the outer surface of the cylinder body of the GIL 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 GIL fault localization system based on ultrasonic and earth-electric wave technology of claim 1, further comprising: and the sensor is attached to the outer surface of the cylinder body of the GIL through the sucker.
3. The GIL fault location system based on ultrasonic and geowave technology as claimed in claim 1 or 2, further comprising: the elastic seat is arranged between the sensor and the GIL and connected with a flange of the GIL to fix the sensor.
4. The GIL fault location system based on ultrasonic and geowave technology of claim 1, wherein said adjacent sensors attached to the GIL are spaced apart by a distance of 10 ~ 36 meters.
5. The GIL fault location system based on ultrasonic and earth-electric wave technology as claimed in claim 1 or 4, wherein each signal acquisition device is connected with 3 said sensors, and 3 said sensors respectively acquire GIL three-phase ultrasonic signals and instantaneous overvoltage signals.
6. The GIL fault location system based on ultrasonic and geoelectric wave technology as claimed in claim 1 or 4, wherein said sensor collects ultrasonic signals in a frequency range of 20KHz to 200KHz and instantaneous overvoltage signals in a frequency range of 3MHz to 100 MHz.
7. The GIL fault location system based on ultrasonic and geoelectric wave technology of claim 1, wherein said signal acquisition device is connected to said sensor by a coaxial shielded cable.
8. The GIL fault localization system based on ultrasonic and geowave technology of claim 1, wherein said 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 GIL fault localization system based on ultrasonic and earth-electric wave technology of claim 8, wherein 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.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911147882.3A CN110716113A (en) | 2019-11-21 | 2019-11-21 | GIL fault positioning system based on ultrasonic wave and earth electric wave technology |
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| CN201911147882.3A CN110716113A (en) | 2019-11-21 | 2019-11-21 | GIL fault positioning system based on ultrasonic wave and earth electric wave technology |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112067980A (en) * | 2020-07-27 | 2020-12-11 | 国网河北省电力有限公司检修分公司 | Arcing monitoring system and method for high-voltage circuit breaker |
| CN113702778A (en) * | 2021-08-10 | 2021-11-26 | 国网电力科学研究院武汉南瑞有限责任公司 | GIL arc discharge fault positioning method and system |
-
2019
- 2019-11-21 CN CN201911147882.3A patent/CN110716113A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112067980A (en) * | 2020-07-27 | 2020-12-11 | 国网河北省电力有限公司检修分公司 | Arcing monitoring system and method for high-voltage circuit breaker |
| CN113702778A (en) * | 2021-08-10 | 2021-11-26 | 国网电力科学研究院武汉南瑞有限责任公司 | GIL arc discharge fault positioning method and system |
| CN113702778B (en) * | 2021-08-10 | 2024-05-24 | 国网电力科学研究院武汉南瑞有限责任公司 | GIL arc discharge fault positioning method and system |
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