CN210038034U - Insulator degradation detection device based on ultra wide band antenna sensor - Google Patents
Insulator degradation detection device based on ultra wide band antenna sensor Download PDFInfo
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- CN210038034U CN210038034U CN201920437989.0U CN201920437989U CN210038034U CN 210038034 U CN210038034 U CN 210038034U CN 201920437989 U CN201920437989 U CN 201920437989U CN 210038034 U CN210038034 U CN 210038034U
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Abstract
The utility model discloses an insulator degradation detection device based on ultra wide band antenna sensor, it includes antenna medium base plate, the upper and lower surface of antenna medium base plate is equipped with basic radiating element and ground plate respectively, basic radiating element is ultra wide band monopole antenna, basic radiating element's bottom is the arc limit, upper portion is the linear type limit, basic radiating element's bottom is close to the base of antenna medium base plate, upper portion is close to the topside of antenna medium base plate, the central point on basic radiating element bottom arc limit puts an organic whole and is connected with the extension strip that extends to antenna medium base plate base, the ground plate is for hugging closely the rectangular shape structure on antenna medium base plate base. The utility model discloses an electromagnetic wave that ultra wide band monopole antenna sent the insulator carries out the analysis and judgment, and ultra wide band antenna can work in the low band, because the intensity of the electromagnetic wave that normal insulator and cracked insulator sent is different, so can carry out the insulator according to the intensity of electromagnetic wave and whether the degradation judges.
Description
Technical Field
The utility model relates to an insulator degradation detection device based on ultra wide band antenna sensor can be used to special high voltage direct current transmission line, special high voltage alternating current transmission line's insulator and detects, belongs to insulator degradation detection technical field.
Background
With the development of social economy and the improvement of economic level, the development of a power system is rapid. Safety and reliability are basic requirements of operation of a power system, the installed capacity of power equipment is larger and larger along with the rise of the voltage level of the power system, and power consumers and scientists focus on the insulation problem of the power system.
Insulators are widely used in power systems, and the figure of the insulators is hidden on various high-voltage transmission lines. Insulators used on power transmission lines we refer to as line insulators. Because the insulator is exposed outside throughout the year, is influenced by natural environment, such as thunder electricity, wind and rain, and works in high electric field and strong magnetic field environment, the mechanical strength of the insulator can be reduced, the insulation resistance is reduced, the electrical performance and the thermal performance are weakened until creeping discharge, cracking and even breakdown of the insulator occur, wherein pollution flashover is the most dangerous. With the increase of the widespread use of the insulator, problems caused by pollution flashover of the insulator are endless, which completely violates the requirements of safety and reliability of a power system, and the economic loss caused by the large size and the low price of the insulator cannot be ignored. Therefore, the method has very important significance in detecting the live insulator.
Generally, the charged detection method of the insulator is classified into two major types, including an electric quantity detection method including a surface leakage current method, an insulation resistance method, an electric field measurement method, a pulse current method, and the like, and a non-electric quantity detection method including an observation method, an infrared temperature measurement method, a laser doppler vibration method, and the like. The common detection method for the defects of the insulator comprises the following steps:
(1) ultrasonic detection method
With the increasing maturity of ultrasonic technology and the wide application field, whether the insulator cracks or not can be detected according to the response obtained by emitting ultrasonic waves to the surface of the insulator. The specific principle is as follows: if the insulator contains micro cracks, when the ultrasonic waves irradiate the surface of the insulator, physical phenomena such as reflection, refraction and the like are generated at the cracks of the insulator, and then the received ultrasonic waves are processed by the receiving device, so that the deterioration degree of the insulator can be obtained through analysis, and further whether the insulator needs to be repaired, replaced and the like is judged. However, the method has the disadvantages that the method can only be applied to cracked insulators, and the method has no way of judging the insulators without cracking, so that the method also has certain limitations.
(2) Laser Doppler vibration method
The principle of the detection method is that the judgment is carried out by comparing the vibration frequency of the cracked insulator with the vibration frequency of the normal insulator. The concrete measures are as follows: the insulator vibrates by utilizing the sound wave generator or by means of external force, in the process, the Doppler instrument and the insulator are placed face to face, laser irradiates on the insulator to be reflected or refracted, the oscillation frequency of the center of the insulator is judged through a returned signal, and therefore the fact that the interior of the detected insulator has defects can be obtained. The detection method is similar to the principle of the ultrasonic detection method, and the defect of the detection method is that the insulator with the defect inside but the surface which is not cracked can not be detected. In addition, because the Doppler meter occupies a large area and is complex to operate and maintain, the Doppler meter cannot be popularized and applied in a large area.
(3) Corona camera method
The method is characterized in that the method is judged according to the fact that when a bad insulator appears, the corona phenomenon can be enhanced on the normal insulator around the bad insulator, the phenomenon can be clearly captured by a corona camera and is not influenced by natural environments such as sunlight radiation, the corona phenomenon can be observed by the aid of the corona camera, the phenomenon can be observed by the aid of the corona camera when the bad insulator exists, the method can work in different natural environments, performance is not influenced, defects of the insulator cannot be observed, equipment is expensive in manufacturing cost, and the method is not suitable for popularization.
(4) Voltage distribution measuring method
The principle of the voltage distribution measurement method is as follows: when the insulator string normally works, the voltage distribution curve shows a smooth non-standard saddle shape, the voltage values born by different positions of the insulator string are different, the voltage value on the side closer to the lead is higher and is about 1.7-3 times of that on the side closer to the grounding end, and the middle part of the insulator string bears the lowest voltage. According to data statistics, when the insulator string works normally, the voltage ratio of two ends of two adjacent insulators of the insulator string is 1.1-1.3, and whether deteriorated insulators exist can be judged by an adjacent comparison method.
The voltage distribution measuring method has the advantages of simplicity, intuition, accurate measurement, convenience in reading and the like, a self-climbing insulator live detector is developed at present, the workload of workers is reduced, and the method has the defects that climbing measurement is needed and certain unsafe factors exist, so that the method still has difficulty in wide popularization, and how to solve the problems is a problem of continuous research of domestic and foreign researchers.
(5) Pulse current detection method
The insulator works in an extremely uneven electric field to generate corona discharge, and the pulse current detection method is used for measuring the pulse current of the insulator string during corona generation to realize insulation. The principle of the method is as follows: when a bad insulator appears, the insulation strength is reduced, the insulation resistance is suddenly reduced, and because the insulator string is connected in series in the system, the resistance of the deteriorated insulator is reduced, the voltage at the two ends of the deteriorated insulator is relatively reduced, so that the normal insulator bears much higher voltage than under normal operation, and the working condition of the normal insulator is threatened. Because the total resistance is reduced, under the condition of unchanged working voltage, the current is increased, and the corona phenomenon is more severe.
Therefore, a non-contact detection device which is accurate, rapid, low-cost and safe is urgently needed in the field of insulator detection, hidden dangers are discovered in time, and the operation and maintenance efficiency of the insulator is improved.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a can be accurate, quick, low-cost, safe non-contact's insulator degradation detection device, it is an insulator degradation detection device based on ultra wide band antenna sensor to and discover hidden danger in time, improve insulator fortune dimension efficiency.
The utility model adopts the following technical scheme: an insulator degradation detection device based on an ultra-wideband antenna sensor comprises an antenna medium substrate, wherein a basic radiation unit and a ground plate are respectively arranged on the upper surface and the lower surface of the antenna medium substrate, the basic radiation unit is an ultra-wideband monopole antenna, the bottom of the basic radiation unit is an arc edge, the upper portion of the basic radiation unit is a linear edge, the bottom of the basic radiation unit is close to the bottom edge of the antenna medium substrate, the upper portion of the basic radiation unit is close to the top edge of the antenna medium substrate, the central position of the arc edge at the bottom of the basic radiation unit is integrally connected with an extension strip extending to the bottom edge of the antenna medium substrate, and the ground plate is of a long.
The lower part of the basic radiation unit is in a semi-circular arc shape, and a U-shaped notch is formed in the center of a straight line edge of the upper part of the basic radiation unit.
And a rectangular groove is formed in the middle of the upper part of the grounding plate.
Rectangular cutting corners are respectively arranged at two ends of the upper part of the grounding plate.
The working frequency of the ultra-wideband monopole antenna is 0.3GHz-3 GHz.
The material of the antenna dielectric substrate is FR 4.
The width of the antenna dielectric substrate is 16cm, the height of the antenna dielectric substrate is 12cm, and the thickness of the antenna dielectric substrate is 0.1 cm.
The utility model has the advantages that: because insulator degradation and filthy in-process can produce little electric current and weak magnetic field signal, produced electromagnetic wave is also relatively more weak, the utility model discloses a detection device carries out analysis and judgment through the electromagnetic wave that ultra wide band monopole antenna sent the insulator, and the ultra wide band antenna can work in the low frequency band, because the intensity of the electromagnetic wave that normal insulator and cracked insulator sent is different, so alright carry out the insulator according to electromagnetic wave intensity and whether the degradation judges. The utility model has the advantages of the principle is simple, low cost, and equipment is easily operated, and concrete advantage is as follows:
(1) the utility model discloses a detection device is electromagnetic wave transceiver, small light in weight, can install inside insulator check out test set, very easy to assemble and use.
(2) Insulator chain contactless measurement can be realized, need not with insulator direct contact, improves the security that insulator fortune dimension was overhauld by a wide margin, convenient and fast, improves detection efficiency by a wide margin.
(3) The insulator degradation detection is realized by adopting the ultra-wideband antenna, and compared with the existing traditional detection mode, the insulator degradation detection method has the advantages of simple principle, low cost and easy operation of equipment;
(4) and electromagnetic field variable measurement criteria are introduced, and the monitoring means and data reliability are higher.
Preferably, the utility model discloses a basic radiation unit warp on the basis of semi-circular monopole antenna and obtains, through getting rid of its upper portion central part, the semi-circular periphery has replaced complete semicircle paster to the both sides top of semicircle paster has been prolonged, forms the ultra wide band monopole antenna of U type, and the girth of radiation paster obtains the extension through this one step's deformation, can increase ultra wide band monopole antenna outlying radiation current path.
Preferably, the utility model discloses separated a rectangular channel at the ground plate intermediate part to set up the rectangle corner cut respectively at the both ends of ground plate, be used for improving the matching characteristic of antenna, expanding the working bandwidth.
Drawings
Fig. 1 is a schematic front view of the ultra-wideband antenna sensor-based insulator degradation detection device of the present invention;
fig. 2 is a schematic diagram of the reverse side of the ultra-wideband antenna sensor-based insulator degradation detection device of the present invention;
fig. 3 is the simulation result of the S parameter of the present invention.
In the figure, 1-antenna dielectric substrate, 2-basic radiating element, 21-extension bar, 22-U-shaped notch, 3-grounding plate, 31-rectangular groove and 32-rectangular opening.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The utility model relates to an insulator degradation detection device based on ultra wide band antenna sensor of embodiment is shown in FIG. 1 to FIG. 2, and the detection device of this embodiment includes antenna medium base plate 1, and antenna medium base plate 1's material is FR4, and antenna medium base plate 1's width is 16cm, highly is 12cm, and thickness is 0.1 cm. The upper surface and the lower surface of the antenna medium substrate 1 are respectively provided with a basic radiation unit 2 and an earth plate 3, the basic radiation unit 2 is an ultra wide band monopole antenna, the operating frequency of the ultra wide band monopole antenna is 0.3GHz-3GHz, the bottom of the basic radiation unit 2 is an arc edge, the upper part of the basic radiation unit 2 is a linear edge, the bottom of the basic radiation unit 2 is close to the bottom edge of the antenna medium substrate 1, the upper part of the basic radiation unit 2 is close to the top edge of the antenna medium substrate, the central position of the arc edge at the bottom of the basic radiation unit 2 is integrally connected with an extension strip 21 extending to the bottom edge of the antenna medium substrate 1, and the earth plate 3 is.
In this embodiment, the lower portion of the basic radiation unit 2 is a semi-circular arc, and a U-shaped notch 22 is formed at the center of the straight line edge of the upper portion of the basic radiation unit 2. The basic radiation unit 2 of the embodiment is obtained by deformation on the basis of the semicircular monopole antenna, the complete semicircular patch is replaced by the semicircular periphery by removing the upper central part of the basic radiation unit, the tops of two sides of the semicircular patch are prolonged, the U-shaped ultra-wideband monopole antenna is formed, the perimeter of the radiation patch is prolonged by the deformation of the step, and the radiation current path of the periphery of the ultra-wideband monopole antenna can be increased.
In the embodiment, the rectangular groove 31 is formed in the middle of the upper part of the grounding plate 3, and the rectangular cutting angles 32 are respectively formed at the two ends of the upper part of the grounding plate 3, so that the matching characteristic of the antenna is improved, and the working bandwidth is expanded.
Based on ANSOFT HFSS 15, the ultra-wideband antenna in the detection device of the embodiment is simulated, and S parameter simulation results of the antenna are obtained, as shown in FIG. 3, it can be seen from the simulation results that the ultra-wideband antenna works at 0.3-3.4GHz, and the requirements of the ultra-wideband antenna are met.
The utility model discloses a detection device carries out analysis and judgment through the electromagnetic wave that ultra wide band monopole antenna sent the insulator, and ultra wide band antenna can work in the low band, because the intensity of the electromagnetic wave that normal insulator and cracked insulator sent is different, so alright carry out the insulator according to the intensity of electromagnetic wave and whether the degradation judges. The utility model has the advantages of as follows:
(1) the utility model discloses a detection device is electromagnetic wave transceiver, small light in weight, and the size is 16cm x 12cm x 0.1cm, can install inside insulator check out test set, very easy to assemble and use.
(2) Insulator chain contactless measurement can be realized, need not with insulator direct contact, improves the security that insulator fortune dimension was overhauld by a wide margin, convenient and fast, improves detection efficiency by a wide margin.
(3) Adopt ultra wide band antenna to realize insulator degradation detection, compare with current traditional detection mode, the principle is simple, low cost, and equipment is easy to operate.
(4) And electromagnetic field variable measurement criteria are introduced, and the monitoring means and data reliability are higher.
The above embodiments are preferred embodiments of the present invention, and it should be understood by those skilled in the art that the above embodiments do not limit the protection scope of the present invention in any way, and all technical solutions obtained by adopting equivalent substitution and the like all fall within the protection scope of the present invention.
The utility model discloses the part that does not relate to all is the same with prior art or can adopt prior art to realize.
Claims (7)
1. The utility model provides an insulator degradation detection device based on ultra wide band antenna sensor which characterized in that: the antenna comprises an antenna medium substrate, wherein a basic radiation unit and a ground plate are respectively arranged on the upper surface and the lower surface of the antenna medium substrate, the basic radiation unit is an ultra-wideband monopole antenna, the bottom of the basic radiation unit is an arc-shaped edge, the upper part of the basic radiation unit is a linear edge, the bottom of the basic radiation unit is close to the bottom edge of the antenna medium substrate, the upper part of the basic radiation unit is close to the top edge of the antenna medium substrate, the central position of the arc-shaped edge at the bottom of the basic radiation unit is integrally connected with an extension strip extending to the bottom edge of the antenna medium substrate, and the ground.
2. The ultra-wideband antenna sensor based insulator degradation detection apparatus according to claim 1, wherein: the lower part of the basic radiation unit is in a semi-circular arc shape, and a U-shaped notch is formed in the center of a straight line edge of the upper part of the basic radiation unit.
3. The ultra-wideband antenna sensor based insulator degradation detection apparatus according to claim 1, wherein: and a rectangular groove is formed in the middle of the upper part of the grounding plate.
4. The ultra-wideband antenna sensor based insulator degradation detection apparatus according to claim 1, wherein: rectangular cutting corners are respectively arranged at two ends of the upper part of the grounding plate.
5. The ultra-wideband antenna sensor based insulator degradation detection apparatus according to claim 1, wherein: the working frequency of the ultra-wideband monopole antenna is 0.3GHz-3 GHz.
6. The ultra-wideband antenna sensor based insulator degradation detection apparatus according to claim 1, wherein: the material of the antenna dielectric substrate is FR 4.
7. The ultra-wideband antenna sensor based insulator degradation detection apparatus according to claim 1, wherein: the width of the antenna dielectric substrate is 16cm, the height of the antenna dielectric substrate is 12cm, and the thickness of the antenna dielectric substrate is 0.1 cm.
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| CN201920437989.0U CN210038034U (en) | 2019-04-02 | 2019-04-02 | Insulator degradation detection device based on ultra wide band antenna sensor |
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| CN201920437989.0U CN210038034U (en) | 2019-04-02 | 2019-04-02 | Insulator degradation detection device based on ultra wide band antenna sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110058130A (en) * | 2019-04-02 | 2019-07-26 | 中科伟博(苏州)智能科技有限公司 | A kind of insulator deterioration detecting apparatus based on ultra-wideband antenna sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110058130A (en) * | 2019-04-02 | 2019-07-26 | 中科伟博(苏州)智能科技有限公司 | A kind of insulator deterioration detecting apparatus based on ultra-wideband antenna sensor |
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