CN204116460U - A kind of measuring system being applicable to insulating material high field conduction characteristic - Google Patents
A kind of measuring system being applicable to insulating material high field conduction characteristic Download PDFInfo
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- CN204116460U CN204116460U CN201420656783.4U CN201420656783U CN204116460U CN 204116460 U CN204116460 U CN 204116460U CN 201420656783 U CN201420656783 U CN 201420656783U CN 204116460 U CN204116460 U CN 204116460U
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Abstract
The utility model discloses a kind of measuring system being applicable to insulating material high field conduction characteristic, relate to a kind of conductance measurement technology of insulating material, in high voltage DC power equipment, particularly bear the conductance measurement of the insulating material of higher field intensity and temperature.The utility model is filled polytetrafluoroethylene around upper/lower electrode, by structural design, effectively reduces the volume of high field conduction measurement mechanism; Utilize betal can and shielding line shielding interference and with 6517 meggers as measuring element, achieve accurately measuring of insulating material high field conduction; Electric field and temperature can be applied to material simultaneously, achieve the measurement of the conductivity of material characteristic under multiple factors effect; Rational electrode insulation material selection and insulating structure design ensure that the applicability of this electrode under high field intensity.By the utility model, can study the conductivity of insulating material under high field intensity, for the reliability improving Electric Power Equipment Insulation provides experiment and theoretical research foundation.
Description
Technical field
The utility model belongs to the conductance measurement technical field of insulating material, is specifically related to a kind of measuring system being applicable to insulating material high field conduction characteristic.
Background technology
In actual motion, the insulating material of electrical equipment often needs to bear higher electric field intensity and temperature, as D.C. high voltage transmission cable insulation, will bear very high field intensity in its operational process, and causes temperature very high because current loss generates heat.Under different field intensity, different temperatures, the electrical conduction mechanism of insulating material is different, presents different conductance properties.By measuring the conductivity variations rule of insulating material under high field intensity, high temperature, contributing to researching and developing new insulation material, instructing insulation system appropriate design, reducing the risk that insulating material punctures.
Due to the requirement of the restriction and shielding of testing three electrode sizes, the electric pressure of existing conduction testing equipment is lower (1kV), the harm such as corona discharge, creeping discharge can be produced when applying high voltage, therefore be necessary the three-electrode system researching and developing the conductance measurement that voltage levels is suitable for.
Utility model content
The purpose of this utility model is to overcome existing conductivity measuring device voltage withstand class by the restriction of electrode size and shielding requirements, function singleness, not easily to make and the deficiency of keeping in repair, and provides a kind of that can use under higher electric field, that volume is little, shield effectiveness good, measurement result is applicable to insulating material high field conduction characteristic more accurately measuring system.
To achieve these goals, the technical scheme that the utility model adopts comprises the three electrode measurement systems for measuring insulating material sample conductance property, the input end of three electrode measurement systems is connected with high-voltage DC power supply, another output terminal is connected with one end of megger by circuit overcurrent protective device, the equal ground connection of the other end of megger, circuit overcurrent protective device and high-voltage DC power supply; The signal output part of megger is also connected with the computing machine for calculating corresponding current density and volume resistivity value according to the current signal collected.
Three described electrode measurement systems comprise the upper epoxy tube, top electrode, insulating material sample, bottom electrode and four that set gradually from top to bottom and play insulating effects and support the support epoxy tube of whole device; Upper epoxy tube, top electrode, insulating material sample and bottom electrode are all wrapped in metal shell; Wherein, metal shell is divided into three parts from top to bottom, and Part I superscribes epoxy tube, and the envelope filled full insulating air of this part metals, form air insulating layer; Part II is identical with Part III structure, is respectively used to superscribe electrode and bottom electrode, and equal filled polytetrafluoroethylene in this two parts metal shell, form teflon insulation layer; Be provided with wire in upper epoxy tube, one end of this wire is connected with high-voltage DC power supply as the input end of three electrode measurement systems, and the other end is connected with top electrode by the first current-limiting resistance; The lower end of bottom electrode is connected with circuit overcurrent protective device as the output terminal of three electrode measurement systems.
The lower surface of described top electrode and the teflon of bottom electrode upper surface are the zigzag opposition structure that can cooperatively interact for increasing along face creep distance, reduction electrode volume.
Described metal shell adopts can stop the aluminum alloy casing that outer signals is disturbed.
The lower surface of described top electrode stretches out the lower surface of the teflon of filling around it, and the lower surface edge of top electrode is provided with the chamfering for preventing creeping discharge.
The part of the metal shell joint of described top electrode and bottom electrode is wound around the shielding line being used for ground connection.
Described bottom electrode comprises and arranging and middle cylindrical electrode, and is arranged at the circular ring electrode outside cylindrical electrode, and is filled with teflon in space between cylindrical electrode and circular ring electrode.
Described megger adopts 6517 high resistance meters can measuring the resistance of 1017 Ω.
Described circuit overcurrent protective device comprises voltage source, one end ground connection of voltage source, and the other end is connected with the input end of megger with current-limiting resistance by the pull-up resistor of series connection, the other end ground connection of megger; Node between pull-up resistor and current-limiting resistance is connected with the output terminal of three electrode measurement systems, and this node is also connected with one end of docking stabilivolt, the other end ground connection of docking stabilivolt.
Compared with prior art, the utility model has following beneficial effect:
The utility model is filled polytetrafluoroethylene around upper/lower electrode, by structural design, effectively reduces the volume of high field conduction measurement mechanism; Utilize betal can and shielding line shielding interference and with 6517 meggers as measuring element, achieve accurately measuring of insulating material high field conduction; Electric field and temperature can be applied to material simultaneously, achieve the measurement of the conductivity of material characteristic under multiple factors effect; Rational electrode insulation material selection and insulating structure design ensure that the applicability of this electrode under high field intensity.By the utility model, can study the conductivity of insulating material under high field intensity, for the reliability improving Electric Power Equipment Insulation provides experiment and theoretical research foundation.
Further, the teflon of the utility model top electrode lower surface and bottom electrode upper surface is zigzag opposition structure, can increase along face creep distance, reduce electrode external diameter, thus reduce the volume of electrode.
Further, the utility model top electrode lower surface is a little more than teflon lower surface, and the lower surface edge chamfered of high-field electrode, thus effectively prevent creeping discharge.
Further, the utility model utilizes aluminium alloy encasing system to stop, and outer signals is disturbed, be wound around the shielding line of ground connection in upper/lower electrode betal can joint simultaneously, external undesired signal can be imported the earth, and avoid interference signal and enter electrode interior interferometry signal from gap between upper/lower electrode, reduce the loss of signal transmission simultaneously.
Further, the insulating property that the utility model utilizes teflon good, make the voltage withstand class of measuring system reach 30kV, so just can the real work electric field of simulated high-pressure insulation of electrical installation material, measure the conductance property of insulating material under high field intensity.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of high field conduction test macro;
Fig. 2 is the structural drawing of three-electrode system;
Fig. 3 is the schematic diagram of protective device.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
See Fig. 1 to Fig. 3, the utility model comprises the three electrode measurement systems for measuring insulating material sample conductance property, the input end of three electrode measurement systems is connected with high-voltage DC power supply, another output terminal is connected by circuit overcurrent protective device one end with megger A, the equal ground connection of the other end of megger A, circuit overcurrent protective device and high-voltage DC power supply; Megger adopts can measure 10
176517 high resistance meters of the resistance of Ω; The signal output part of megger is also connected with the computing machine for calculating corresponding current density and volume resistivity value according to the current signal collected.Circuit overcurrent protective device comprises voltage source E, one end ground connection of voltage source E, and the other end is by the pull-up resistor R of series connection
1with current-limiting resistance R
2be connected with the input end of megger A, the other end ground connection of megger A; Pull-up resistor R
1with current-limiting resistance R
2between node be connected with the output terminal of three electrode measurement systems, and this node is also connected with one end of docking stabilivolt D, the other end ground connection of docking stabilivolt D.
Three electrode measurement systems comprise the upper epoxy tube 8, top electrode 6, insulating material sample 7, bottom electrode 9 and at least two that set gradually from top to bottom and rise and insulate and support the support epoxy tube 4 of whole device; Upper epoxy tube 8, top electrode 6, insulating material sample 7 and bottom electrode 9 are all wrapped in metal shell 3, and metal shell 3 adopts can stop the aluminum alloy casing that outer signals is disturbed; Wherein, metal shell 3 is divided into three parts from top to bottom, and Part I superscribes epoxy tube 8, and the envelope filled full insulating air of this part metals, form air insulating layer 1; Part II is identical with Part III structure, is respectively used to superscribe electrode 6 and bottom electrode 9, and equal filled polytetrafluoroethylene in this two parts metal shell, form teflon insulation layer 2; Be provided with wire in upper epoxy tube 8, one end of this wire is connected with high-voltage DC power supply as the input end of three electrode measurement systems, and the other end is connected with top electrode 6 by the first current-limiting resistance 5; The lower end of bottom electrode 9 is connected with circuit overcurrent protective device as the output terminal of three electrode measurement systems.
The lower surface of top electrode 6 and the teflon of bottom electrode 9 upper surface are the zigzag opposition structure that can cooperatively interact for increasing along face creep distance, reduction electrode volume.The lower surface of top electrode 6 stretches out the lower surface of the teflon of filling around it, and the edge of top electrode 6 is provided with the chamfering for preventing creeping discharge.Top electrode 6 and bottom electrode 9 are wound around with the part of metal shell joint the shielding line being used for ground connection.Bottom electrode 9 comprises and arranging and middle cylindrical electrode, and is arranged at the circular ring electrode outside cylindrical electrode, and is filled with teflon in space between cylindrical electrode and circular ring electrode.
The utility model also has the following advantages:
The utility model comprises high-voltage DC power supply, for providing the high voltage of measurement; Three-electrode system, for measuring the specific insulation of insulating material; 6517 meggers, for measuring the size of current by insulating material; Computing machine, for Real-time Collection 6517 megger measurement data and data are processed.High field conduction measurement three-electrode system of the present utility model practicality reasonable in design, light, stable performance, precisely can record the conductance property of insulating material under high field intensity and different temperatures.
The utility model due to three electrode volumes little, lightweight, high temperature oven (epoxy tube make support prevent electrode to be communicated with baking oven contact internal walls) can be put into, and design temperature on demand, just can free control survey temperature, thus can the actual work temperature of simulation material, measure the conductance property of insulating material under different temperatures.During electrical equipment actual motion, its insulating material often will bear the synergy of electric heating stress.When high field intensity and high temperature apply simultaneously, just can the symphyogenetic situation of analog electrical thermal stress, thus the conductance property of insulating material under measuring high field intensity high temperature action.Utilize that 6517 high resistance measuring instruments are maximum can measure 10
17the resistance of Ω, therefore accurately can record the nA even electric current of pA rank, thus ensure that the precision measuring electric current.The utility model, by conventional current signal acquisition and processing software, realizes the remote monitoring to 6517, thus realizes the real-time measurement to output current, and can conveniently calculate corresponding current density and volume resistivity value according to pre-conditioned.The introducing of current-limiting protection circuit can prevent from burning out 6517 meggers when electric current is excessive in circuit.
Apply specific embodiment in the utility model to set forth principle of the present utility model and embodiment, the explanation of above embodiment just understands method of the present utility model and core concept thereof for helping; Meanwhile, for one of ordinary skill in the art, according to thought of the present utility model, all will change in specific embodiments and applications, in sum, this description should not be construed as restriction of the present utility model.
Claims (9)
1. an insulating material high field conduction characteristic measuring system, it is characterized in that: comprise the three electrode measurement systems for measuring insulating material sample conductance property, the input end of three electrode measurement systems is connected with high-voltage DC power supply, another output terminal is connected with one end of megger (A) by circuit overcurrent protective device, the equal ground connection of the other end of megger (A), circuit overcurrent protective device and high-voltage DC power supply; The signal output part of megger is also connected with the computing machine for calculating corresponding current density and volume resistivity value according to the current signal collected.
2. insulating material high field conduction characteristic measuring system according to claim 1, is characterized in that: three described electrode measurement systems comprise the upper epoxy tube (8), top electrode (6), insulating material sample (7), bottom electrode (9) and four that set gradually from top to bottom and play insulating effects and support the support epoxy tube (4) of whole device; Upper epoxy tube (8), top electrode (6), insulating material sample (7) and bottom electrode (9) are all wrapped in metal shell (3); Wherein, metal shell (3) is divided into three parts from top to bottom, and Part I superscribes epoxy tube (8), and the envelope filled full insulating air of this part metals, form air insulating layer (1); Part II is identical with Part III structure, is respectively used to superscribe electrode (6) and bottom electrode (9), and equal filled polytetrafluoroethylene in this two parts metal shell, form teflon insulation layer (2); Upper epoxy tube is provided with wire in (8), and one end of this wire is connected with high-voltage DC power supply as the input end of three electrode measurement systems, and the other end is connected with top electrode (6) by the first current-limiting resistance (5); The lower end of bottom electrode (9) is connected with circuit overcurrent protective device as the output terminal of three electrode measurement systems.
3. insulating material high field conduction characteristic measuring system according to claim 2, is characterized in that: the lower surface of described top electrode (6) and the teflon of bottom electrode (9) upper surface are the zigzag opposition structure that can cooperatively interact for increasing along face creep distance, reduction electrode volume.
4. the insulating material high field conduction characteristic measuring system according to Claims 2 or 3, is characterized in that: described metal shell (3) adopts can stop the aluminum alloy casing that outer signals is disturbed.
5. the insulating material high field conduction characteristic measuring system according to Claims 2 or 3, it is characterized in that: the lower surface of described top electrode (6) stretches out the lower surface of the teflon of filling around it, and the lower surface edge of top electrode (6) is provided with the chamfering for preventing creeping discharge.
6. the insulating material high field conduction characteristic measuring system according to Claims 2 or 3, is characterized in that: the part of described top electrode (6) and the metal shell joint of bottom electrode (9) is wound around the shielding line being used for ground connection.
7. the insulating material high field conduction characteristic measuring system according to Claims 2 or 3, it is characterized in that: described bottom electrode (9) comprises the cylindrical electrode arranged with middle, and the circular ring electrode be arranged at outside cylindrical electrode, and be filled with teflon in space between cylindrical electrode and circular ring electrode.
8. insulating material high field conduction characteristic measuring system according to claim 1 and 2, is characterized in that: described megger adopts can measure 10
176517 high resistance meters of the resistance of Ω.
9. insulating material high field conduction characteristic measuring system according to claim 1 and 2; it is characterized in that: described circuit overcurrent protective device comprises voltage source (E); one end ground connection of voltage source (E), the other end is by the pull-up resistor (R of series connection
1) and current-limiting resistance (R
2) be connected with the input end of megger (A), the other end ground connection of megger (A); Pull-up resistor (R
1) and current-limiting resistance (R
2) between node be connected with the output terminal of three electrode measurement systems, and this node also with docking stabilivolt (D) one end be connected, dock stabilivolt (D) other end ground connection.
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| CN201420656783.4U CN204116460U (en) | 2014-11-05 | 2014-11-05 | A kind of measuring system being applicable to insulating material high field conduction characteristic |
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| CN201420656783.4U CN204116460U (en) | 2014-11-05 | 2014-11-05 | A kind of measuring system being applicable to insulating material high field conduction characteristic |
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Cited By (9)
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| CN104678220A (en) * | 2015-02-27 | 2015-06-03 | 上海和伍新材料科技有限公司 | Standardizing test method and device for influence of insulating material on electrical contact performance |
| CN104965125A (en) * | 2015-06-25 | 2015-10-07 | 国网智能电网研究院 | Measuring system for cable accessory insulating material interface conductivity |
| CN106443199A (en) * | 2016-10-17 | 2017-02-22 | 中国电力科学研究院 | Capacitance and dielectric loss measurement system and method of electrically insulating material |
| CN106771623A (en) * | 2017-01-19 | 2017-05-31 | 西安交通大学 | The test device of insulating materials resistance and resistivity under a kind of hot environment |
| CN106885976A (en) * | 2017-04-10 | 2017-06-23 | 中国人民解放军军械工程学院 | Electric field-sensitive type insulating materials static properties test device and system |
| CN108008194A (en) * | 2017-08-17 | 2018-05-08 | 哈尔滨理工大学 | One kind is based on the adjustable solid insulating material high field intensity resistivity test system of Paschen's Law air pressure and its test method |
| CN109374975A (en) * | 2018-11-26 | 2019-02-22 | 华中科技大学 | The resistivity test device and method of thin polymer film under a kind of high field intensity |
| CN110333382A (en) * | 2019-07-31 | 2019-10-15 | 国网陕西省电力公司电力科学研究院 | A kind of three layers of sample structure and method measuring insulating materials ionization current characteristic |
| CN116840629A (en) * | 2023-05-11 | 2023-10-03 | 成都产品质量检验研究院有限责任公司 | Polymer insulating material conductivity characteristic test system |
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| CN104678220B (en) * | 2015-02-27 | 2017-11-21 | 上海和伍复合材料有限公司 | The method of testing standardized and device that insulating materials influences on electrical contact performance |
| CN104678220A (en) * | 2015-02-27 | 2015-06-03 | 上海和伍新材料科技有限公司 | Standardizing test method and device for influence of insulating material on electrical contact performance |
| CN104965125A (en) * | 2015-06-25 | 2015-10-07 | 国网智能电网研究院 | Measuring system for cable accessory insulating material interface conductivity |
| CN104965125B (en) * | 2015-06-25 | 2017-11-21 | 全球能源互联网研究院 | A kind of measuring system of cable accessory insulator interface electrical conductivity |
| CN106443199A (en) * | 2016-10-17 | 2017-02-22 | 中国电力科学研究院 | Capacitance and dielectric loss measurement system and method of electrically insulating material |
| CN106771623B (en) * | 2017-01-19 | 2019-10-11 | 西安交通大学 | The test device of insulating materials resistance and resistivity under a kind of hot environment |
| CN106771623A (en) * | 2017-01-19 | 2017-05-31 | 西安交通大学 | The test device of insulating materials resistance and resistivity under a kind of hot environment |
| CN106885976A (en) * | 2017-04-10 | 2017-06-23 | 中国人民解放军军械工程学院 | Electric field-sensitive type insulating materials static properties test device and system |
| CN106885976B (en) * | 2017-04-10 | 2017-12-08 | 中国人民解放军军械工程学院 | Electric field-sensitive type insulating materials static properties test device and system |
| CN108008194A (en) * | 2017-08-17 | 2018-05-08 | 哈尔滨理工大学 | One kind is based on the adjustable solid insulating material high field intensity resistivity test system of Paschen's Law air pressure and its test method |
| CN108008194B (en) * | 2017-08-17 | 2024-07-23 | 哈尔滨理工大学 | High-field-intensity resistivity test system and method for solid insulating material with adjustable air pressure based on bar Shen Dinglv |
| CN109374975A (en) * | 2018-11-26 | 2019-02-22 | 华中科技大学 | The resistivity test device and method of thin polymer film under a kind of high field intensity |
| CN110333382A (en) * | 2019-07-31 | 2019-10-15 | 国网陕西省电力公司电力科学研究院 | A kind of three layers of sample structure and method measuring insulating materials ionization current characteristic |
| CN110333382B (en) * | 2019-07-31 | 2021-08-10 | 国网陕西省电力公司电力科学研究院 | Three-layer sample structure and method for measuring ionization current characteristics of insulating material |
| CN116840629A (en) * | 2023-05-11 | 2023-10-03 | 成都产品质量检验研究院有限责任公司 | Polymer insulating material conductivity characteristic test system |
| CN116840629B (en) * | 2023-05-11 | 2024-06-04 | 成都产品质量检验研究院有限责任公司 | Polymer insulating material conductivity characteristic test system |
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| CF01 | Termination of patent right due to non-payment of annual fee |
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| CF01 | Termination of patent right due to non-payment of annual fee |