CN110672721B - Capacitor voltage transformer partial pressure capacitor surface defect monitoring module - Google Patents
Capacitor voltage transformer partial pressure capacitor surface defect monitoring module Download PDFInfo
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- CN110672721B CN110672721B CN201910992977.9A CN201910992977A CN110672721B CN 110672721 B CN110672721 B CN 110672721B CN 201910992977 A CN201910992977 A CN 201910992977A CN 110672721 B CN110672721 B CN 110672721B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/041—Analysing solids on the surface of the material, e.g. using Lamb, Rayleigh or shear waves
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/26—Scanned objects
- G01N2291/269—Various geometry objects
- G01N2291/2697—Wafer or (micro)electronic parts
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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- Acoustics & Sound (AREA)
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- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Transducers For Ultrasonic Waves (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
- Photovoltaic Devices (AREA)
Abstract
A capacitance voltage transformer partial voltage capacitance surface defect monitoring module comprises: the solar cell comprises conductive glass, a photovoltaic cell, a sonar sensor, a resonator and a transmitter, wherein the upper surface of the conductive glass is coated with a first metal strip and a second metal strip which are formed by conductive thin films, the lower surface of the conductive glass corresponds to the positions of the first metal strip and the second metal strip and is provided with photosensitive chemical materials, the photovoltaic cell is respectively connected with the first metal strip, the sonar sensor, the resonator and the transmitter, the second metal strip is respectively connected with the sonar sensor and the resonator, and the resonator is connected with the transmitter. The monitoring module has the functions of electromagnetic wave signal transmission and acoustic signal transmission, can be installed on the capacitor voltage transformer for a long time, and can be used in combination with various monitoring systems and radio receiving equipment.
Description
Technical Field
The invention belongs to the technical field of capacitor voltage transformers, and particularly relates to a partial pressure capacitor surface defect monitoring module of a capacitor voltage transformer.
Background
The capacitor voltage transformer consists of a voltage division capacitor and a voltage reduction excitation unit, wherein the voltage division capacitor consists of a high-voltage capacitor and a low-voltage capacitor which are connected in series, and the high-voltage capacitor bears main voltage and is the position which is most easy to induce faults.
Tests show that the current and impedance testing method of the capacitor voltage transformer cannot reflect the real operation condition under many conditions, for example, the appearance of some voltage dividing capacitors is obviously cracked, and the equivalent resistance is not obviously changed.
The reasons for this are:
(1) the location of the crack has not caused failure accumulation, failing to cause surface degradation;
(2) the resistance reduction caused by cracking can be shown only in a short time after the rain state;
(3) cracking has not resulted in the accumulation of contaminants and therefore problems cannot be found in the short term.
In any case, after cracking, the instantaneous drop of capacitance or breakdown of the high-voltage capacitor is finally caused. Meanwhile, the cracking phenomenon is also found at the base part of the capacitor voltage transformer, and experience proves that part of cracking can not cause the generation of abnormal discharge signals and high-frequency current signals. Therefore, the conventional insulation test method and discharge detection method sometimes fail, which brings about a great risk.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the surface defect monitoring module for the voltage-dividing capacitor of the capacitor voltage transformer can realize the detection of surface dirt of the voltage-dividing capacitor of the capacitor voltage transformer.
In order to solve the above problems, the present invention provides a surface defect monitoring module for a voltage dividing capacitor of a capacitive voltage transformer, comprising: the solar cell comprises conductive glass, a photovoltaic cell, a sonar sensor, a resonator and a transmitter, wherein the upper surface of the conductive glass is coated with a first metal strip and a second metal strip which are formed by conductive thin films, the lower surface of the conductive glass corresponds to the positions of the first metal strip and the second metal strip and is provided with photosensitive chemical materials, the photovoltaic cell is respectively connected with the first metal strip, the sonar sensor, the resonator and the transmitter, the second metal strip is respectively connected with the sonar sensor and the resonator, and the resonator is connected with the transmitter.
Preferably, the photovoltaic cell further comprises a voltage comparator and two metal electrodes, the photovoltaic cell comprises a single-sided photovoltaic cell and a double-sided photovoltaic cell, the two metal electrodes are respectively connected with the first metal strip and the second metal strip, the single-sided photovoltaic cell and the double-sided photovoltaic cell are respectively connected with the two metal electrodes, the input end of the voltage comparator is respectively connected with the single-sided photovoltaic cell and the double-sided photovoltaic cell, and the output end of the voltage comparator is connected with the emitter.
Preferably, the conductive glass is composed of an ITO thin film and a zinc oxide substrate.
Preferably, the conductive film is composed of charged stripes with gaps of 1um to 50 um.
Preferably, the photovoltaic cell is applied on the conductive glass.
Preferably, the photosensitive chemical material is synthesized from activated carbon, carbon fiber, titanium dioxide and siloxane organics.
Preferably, the resonator is a piezoelectric ceramic transducer or a piezoelectric thin film material.
Preferably, the transmitter includes a transmission driving module and a transmission antenna.
Preferably, the photovoltaic cell, the sonar sensor, the resonator, and the emitter package are disposed on the conductive glass.
Preferably, the voltage comparator, the two metal electrodes, the single-sided photovoltaic cell and the double-sided photovoltaic cell are packaged on the conductive glass.
The surface defect monitoring of the capacitive voltage transformer is demonstrated in an electrical mode and an acoustic mode, as few as possible semiconductor devices are adopted, and the defect detection of surface material characteristics influenced by surface dirt, discharge chemical gas and the like is realized by means of the characteristic that a photovoltaic cell is sensitive to environmental reflection conditions; the method combines double-sided photovoltaic cells and single-sided photovoltaic cells, and the output difference value of the double-sided photovoltaic cells and the single-sided photovoltaic cells is used as the monitoring information quantity, so that the self-calibration characteristic is realized, and the influence of the surrounding environment on the reflection characteristic is obviously reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic diagram of a partial pressure capacitor surface defect monitoring module of a capacitor voltage transformer according to a first embodiment of the present invention;
fig. 2 is a schematic diagram of a partial pressure capacitor surface defect monitoring module of a capacitor voltage transformer according to a second embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
As shown in fig. 1, in an embodiment of the present application, the present application provides a partial pressure capacitor surface defect monitoring module for a capacitor voltage transformer, including: conductive glass 1, photovoltaic cell 2, sonar sensor 3, syntonizer 4 and transmitter 5, the upper surface coating of conductive glass 1 has first metal strip 6 and the second metal strip 7 that is formed by conductive film, the lower surface of conductive glass 1 corresponds first metal strip 6 with the position department of second metal strip 7 is provided with sensitization chemical material, photovoltaic cell 2 respectively with first metal strip 6 sonar sensor 3 the syntonizer 4 with transmitter 5 is connected, second metal strip 7 respectively with sonar sensor 3 with syntonizer 4 is connected, syntonizer 4 with transmitter 5 is connected.
When the monitoring module is working normally, the photovoltaic cell 2 supplies power to the sonar transducer 3, the resonator 4 and the transmitter 5, and the photovoltaic cell 2 is connected to the first metal strip 6, thus indirectly applying a voltage to the conductive glass 1. Under the voltage driving of the photovoltaic cell 2, the conductive glass 1 is influenced by a sensitive photochemical material, and an electric charge exists between electrodes formed by the first metal strip 6 and the second metal strip 7, and the electric charge establishes an electric field signal through the first metal strip 6 and the second metal strip 7 which are coated on the surface of the conductive glass 1 and formed by conductive films.
The second metal strip 7 is connected to the sonar transducer 3, and the sonar transducer 3 emits a signal outwards as long as there is charge drive. The signal emitted by the sonar transducer 3 encounters a solid object and is reflected, and part of the reflected signal is returned to the first metal strip 6 and the second metal strip 7 of the conductive glass 1, thereby changing the electric field characteristics on the metal strips. This feature includes detecting variations in solids, such as surface indentations, cracks, and the like.
Since the second metal strip 7 is also connected to the resonator 4, i.e. the resonator 4 and the sonar transducer 3 are in a parallel relationship. When the signal transmitted by the sonar transducer 3 is reflected by a solid (the solid here refers to a capacitive voltage transformer), the characteristic frequency may change, so that the signal received by the resonator 4 comes from the original light-sensitive charge of the metal strip and the reflected signal of the sonar transducer 3, and under the superposition effect of the two signals, the working interval of the resonator 4 changes and is transmitted by the transmitter 5. The detection equipment on the ground or in other areas can perform conversion processing according to the signals transmitted by the transmitter 5, so as to judge whether the capacitive voltage transformer has cracks.
In this embodiment, conductive glass 1 comprises ITO film and zinc oxide substrate, conductive film adopts the electrified strip in clearance 1um to 50um to constitute, photovoltaic cell 2 pastes and applies on conductive glass 1, sensitization chemical material is synthesized by active carbon, carbon fiber, titanium dioxide and siloxane organic matter, syntonizer 4 is piezoceramics transducer or piezoelectric film material, transmitter 5 is including transmission drive module and transmitting antenna, photovoltaic cell 2 sonar sensor 3 syntonizer 4 with the encapsulation of transmitter 5 set up in on conductive glass 1.
As shown in fig. 2, in the embodiment of the present application, the present application provides a partial pressure capacitor surface defect monitoring module for a capacitor voltage transformer, which further includes a voltage comparator 8 and two metal electrodes on the basis of fig. 1, where the photovoltaic cell 2 includes a single-sided photovoltaic cell 9 and a double-sided photovoltaic cell 10, the two metal electrodes are respectively connected to the first metal strip 6 and the second metal strip 7, the single-sided photovoltaic cell 9 and the double-sided photovoltaic cell 10 are respectively connected to the two metal electrodes, an input end of the voltage comparator 8 is respectively connected to the single-sided photovoltaic cell 9 and the double-sided photovoltaic cell 10, and an output end of the voltage comparator is connected to the transmitter 5.
In the embodiment of the present application, the voltage comparator 8, the two metal electrodes, the single-sided photovoltaic cell 9, and the double-sided photovoltaic cell 10 are packaged and disposed on the conductive glass 1.
Since the photovoltaic cell 2 has very stable light-electricity conversion efficiency, the output signals of the single-sided photovoltaic cell 9 and the double-sided photovoltaic cell 10 can be respectively used as the positive terminal and the negative terminal of the signal, and under normal conditions, if the reflected signal is zero, the output signals of the single-sided photovoltaic cell 9 and the double-sided photovoltaic cell 10 are zero in the present embodiment. The following examples are specifically described below.
As shown in fig. 2, the power of the single-sided photovoltaic cell 9 is 2W, the power of the double-sided photovoltaic cell 10 is 2W above the front surface, and the power of the double-sided photovoltaic cell 10 is 2W below the front surface, under normal conditions, the output voltages of the single-sided photovoltaic cell 9 and the double-sided photovoltaic cell 10 are 5V, and the voltage output by the double-sided photovoltaic cell 10 is also used for supplying power to the sonar sensor 3, the voltage comparator 8, and the transmitter 5.
(A)
Under the condition that the surface of the capacitor voltage transformer is completely insulated and normal, the output of the double-sided photovoltaic cell 10 and the output of the single-sided photovoltaic cell 9 are respectively 4.3V and 4.5V, and the output of the double-sided photovoltaic cell and the output of the single-sided photovoltaic cell 9 are respectively 0.2V through the voltage comparator 8. If the threshold voltage of the driving module of the transmitter 5 is set to 1V, the transmitter 5 does not work under the condition that the surface of the capacitor voltage transformer is completely insulated and normal.
Meanwhile, the sonar sensor 3 transmits ultrasonic signals through the electrode on the conductive glass 1, the transmitting frequency is preferably 40kHz, after the signals are reflected back, the calculated time difference is 1 millisecond, and the output signal voltage is 0.1V.
If the rated driving voltage of the resonator 4 connected to the sonar sensor 3 is set to 0.5V, the resonator 4 does not operate in a normal state.
(II)
The porcelain insulator outside the capacitor of the capacitor voltage transformer generates cracks, and chemical pollutants are formed among the cracks under the action of acid rain.
The contaminants absorb and reflect incident light, causing the output voltage of the bifacial photovoltaic cell 10 to drop to 3V. The output of the single-sided photovoltaic cell 9 under the action of direct light is 4.5V, so that the output of the voltage comparator 8 is 1.5V, the voltage drives the transmitter 5 to work, and a remote receiving module receives the signal and starts related control and management decisions.
In addition, the signal reflection delay time transmitted to the electrode of the conductive glass 1 by the sonar sensor 3 is increased, the output signal reaches 0.8V, the resonator 4 made of the piezoelectric ceramic material is directly driven to work, the resonator 4 is a piezoelectric ceramic transducer, and the resonant frequency is 15kHz, so that a sound signal is generated on the transducer. In addition, the remote acoustic receiving device can also receive the vibration signal of the frequency for subsequent analysis.
The surface defect monitoring of the capacitive voltage transformer is demonstrated in an electrical mode and an acoustic mode, as few as possible semiconductor devices are adopted, and the defect detection of surface material characteristics influenced by surface dirt, discharge chemical gas and the like is realized by means of the characteristic that a photovoltaic cell is sensitive to environmental reflection conditions; the method combines double-sided photovoltaic cells and single-sided photovoltaic cells, and the output difference value of the double-sided photovoltaic cells and the single-sided photovoltaic cells is used as the monitoring information quantity, so that the self-calibration characteristic is realized, and the influence of the surrounding environment on the reflection characteristic is obviously reduced.
The application utilizes the combined action of the conductive glass and the chemical substrate, outputs the abnormal sound wave signal of the capacitor voltage transformer in the running state in a mode of the chemical substrate and the glass substrate electrode, and drives the sonar sensor and the resonator to realize the capture and output of the acoustic signal.
The monitoring module has the functions of electromagnetic wave signal transmission and acoustic signal transmission, can be installed on the capacitor voltage transformer for a long time, and can be used in combination with various monitoring systems and radio receiving equipment.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (9)
1. The utility model provides a capacitive voltage transformer partial pressure electric capacity surface defect monitoring module which characterized in that includes: the solar cell comprises conductive glass, a photovoltaic cell, a sonar sensor, a resonator and a transmitter, wherein a first metal strip and a second metal strip which are formed by conductive thin films are coated on the upper surface of the conductive glass, photosensitive chemical materials are arranged on the lower surface of the conductive glass at positions corresponding to the first metal strip and the second metal strip, the photovoltaic cell is respectively connected with the first metal strip, the sonar sensor, the resonator and the transmitter, the second metal strip is respectively connected with the sonar sensor and the resonator, and the resonator is connected with the transmitter;
the photovoltaic cell comprises a single-sided photovoltaic cell and two double-sided photovoltaic cells, the two metal electrodes are respectively connected with the first metal strip and the second metal strip, the single-sided photovoltaic cell and the double-sided photovoltaic cell are respectively connected with the two metal electrodes, the input end of the voltage comparator is respectively connected with the single-sided photovoltaic cell and the double-sided photovoltaic cell, and the output end of the voltage comparator is connected with the emitter.
2. The capacitance voltage transformer voltage-dividing capacitance surface defect monitoring module according to claim 1, wherein the conductive glass is composed of an ITO film and a zinc oxide substrate.
3. The capacitance voltage transformer voltage-dividing capacitance surface defect monitoring module of claim 1, wherein the conductive film is composed of charged strips with gaps of 1um to 50 um.
4. The capacitance voltage transformer divider capacitor surface defect monitoring module of claim 1, wherein the photovoltaic cell is applied on the conductive glass.
5. The capacitance voltage transformer voltage-dividing capacitor surface defect monitoring module of claim 1, wherein the photosensitive chemical material is synthesized from activated carbon, carbon fiber, titanium dioxide and siloxane organics.
6. The capacitance voltage transformer voltage-dividing capacitance surface defect monitoring module of claim 1, wherein the resonator is a piezoelectric ceramic transducer or a piezoelectric thin film material.
7. The capacitance voltage transformer voltage-dividing capacitance surface defect monitoring module of claim 1, wherein the transmitter comprises a transmission driving module and a transmission antenna.
8. The capacitance voltage transformer divider capacitor surface defect monitoring module of claim 1, wherein the photovoltaic cell, the sonar sensor, the resonator, and the transmitter package are disposed on the conductive glass.
9. The capacitance voltage transformer voltage-dividing capacitance surface defect monitoring module of claim 1, wherein the voltage comparator, the two metal electrodes, the single-sided photovoltaic cell and the double-sided photovoltaic cell are packaged on the conductive glass.
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| CN201910992977.9A CN110672721B (en) | 2019-10-18 | 2019-10-18 | Capacitor voltage transformer partial pressure capacitor surface defect monitoring module |
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| CN102545151A (en) * | 2010-12-22 | 2012-07-04 | 上海市电力公司 | On-line monitoring system for capacitor voltage transformer |
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