CN107797039B - High-voltage cable oscillating wave partial discharge test system - Google Patents
High-voltage cable oscillating wave partial discharge test system Download PDFInfo
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- CN107797039B CN107797039B CN201711000290.XA CN201711000290A CN107797039B CN 107797039 B CN107797039 B CN 107797039B CN 201711000290 A CN201711000290 A CN 201711000290A CN 107797039 B CN107797039 B CN 107797039B
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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
- G01R31/1263—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 solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1272—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 solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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Abstract
The invention discloses a high-voltage cable oscillating wave partial discharge test system which comprises a high-voltage direct-current power supply, a high-voltage switch, a high-voltage reactor, a capacitive voltage divider, a data acquisition and analysis unit and a partial discharge coupling unit, wherein a base is arranged at the bottom of the high-voltage reactor, and a clamping seat is arranged at the top end of the high-voltage reactor; the base include the base that is fixed mutually with high-voltage reactor, the base below is equipped with two symmetrical arrangement's annular fixing base, annular fixing base both ends are the inclined plane structure, are equipped with the limiting plate between the annular fixing base, are equipped with the locating hole on the limiting plate both ends face, are equipped with the telescopic link between limiting plate and the base, the cover is equipped with the spring on the telescopic link. The invention has the characteristics of reducing potential safety hazard and improving installation efficiency.
Description
Technical Field
The invention relates to a cable testing device, in particular to a high-voltage cable oscillating wave partial discharge testing system.
Background
With the improvement of the power supply level requirement, the detection method of the power equipment by each domestic power supply unit is continuously improved, and the detection method is gradually updated from a rough inspection and fault first-aid repair mode to a state monitoring mode of the power equipment, namely, the defects of the power equipment are discovered in an online or offline monitoring mode, potential fault points are maintained in advance, and the effect of not rainy silk is achieved. The off-line oscillatory wave partial discharge test for the power cable is a method which is widely applied internationally at present, and a high-voltage cable oscillatory wave partial discharge test system mainly comprises a high-voltage power supply, a high-voltage switch, a high-voltage reactor, a capacitive voltage divider, a data acquisition device and the like. Because the tested objects are different, the number of the high-voltage reactors needs to be flexibly configured on site, the high-voltage reactors are generally stacked and placed in order not to influence the performance of the high-voltage reactors, the high-voltage reactors are simply stacked, fastening measures are not adopted, certain potential safety hazards exist, positioning is difficult in the installation process, the high-voltage reactors are easy to fall, and the installation efficiency is influenced. Therefore, the prior art has the problems of troublesome installation and unstable installation.
Disclosure of Invention
The invention aims to provide a high-voltage cable oscillating wave partial discharge test system. The invention has the characteristics of convenient installation and improved installation firmness.
The technical scheme of the invention is as follows: the high-voltage cable oscillating wave partial discharge test system comprises a high-voltage direct-current power supply, a high-voltage switch, a high-voltage reactor, a capacitive voltage divider, a data acquisition and analysis unit and a partial discharge coupling unit, wherein a base is arranged at the bottom of the high-voltage reactor, and a clamping seat is arranged at the top end of the high-voltage reactor; the base include the base that is fixed mutually with high-voltage reactor, the base below is equipped with two symmetrical arrangement's annular fixing base, annular fixing base both ends are the inclined plane structure, are equipped with the limiting plate between the annular fixing base, are equipped with the locating hole on the limiting plate both ends face, are equipped with the telescopic link between limiting plate and the base, the cover is equipped with the spring on the telescopic link.
In the high-voltage cable oscillating wave partial discharge test system, a rubber insulating layer is arranged on the lower surface of the annular fixing seat, and frosted lines are arranged on the surface of the insulating rubber layer.
In the high-voltage cable oscillating wave partial discharge test system, the clamping seat is provided with the annular groove corresponding to the annular fixing seat, the annular groove is provided with the limiting groove corresponding to the limiting plate, two ends of the limiting groove are provided with the baffle plates, the baffle plates are provided with the positioning columns, the end parts of the positioning columns are provided with the guide inclined blocks corresponding to the inclined surface structures, and the reset springs are arranged between the guide inclined blocks and the baffle plates.
In the high-voltage cable oscillation wave partial discharge test system, the outer wall of the annular fixing seat is also provided with a positioning strip, and the inner wall of the annular groove is provided with a positioning groove corresponding to the positioning strip.
In the high-voltage cable oscillating wave partial discharge test system, the data acquisition and analysis unit is also connected with a memory and a display screen; the data acquisition and analysis unit is respectively connected with the high-voltage direct-current power supply, the high-voltage switch and the partial discharge coupling unit; the output end of the high-voltage direct-current power supply is connected with the input ends of the high-voltage switch and the high-voltage reactor; the output end of the high-voltage reactor is respectively connected with the input end of the capacitive voltage divider and the tested cable; the output end of the capacitive voltage divider is connected with the input end of the partial discharge coupling unit.
In the high-voltage cable oscillating wave partial discharge test system, the high-voltage reactor and the capacitive voltage divider are respectively provided with an external electric wire connector, and a temperature measuring device is sleeved outside the external electric wire connector; the temperature measuring device comprises a sleeve arranged outside the middle joint, two ends of the inner wall of the sleeve are respectively provided with an elastic sheath, and an inner liner tube is arranged in the elastic sheath; the inner side of the middle part of the sleeve is provided with a temperature sensor, the temperature sensor is connected with a microprocessor, and the microprocessor is connected with a wireless transmitter; an annular groove is arranged on the outer wall of the sleeve, and a heated expansion strip is embedded in the annular groove.
In the high-voltage cable oscillating wave partial discharge test system, a pressure sensor is arranged between the annular groove and the heated expansion strip, and the pressure sensor is connected with the microprocessor.
Compared with the prior art, the base and the clamping seat are arranged at the bottom and the top of the reactor, and the base and the clamping seat are matched with each other, so that the upper and lower adjacent reactors can be fixedly installed, the connection firmness is high, potential safety hazards can be eliminated, the installation is convenient, and the installation efficiency is effectively improved. Through the mutual matching between the annular fixed seat on the base and the annular groove on the clamping seat and the matching between the positioning strip and the positioning groove, the quick positioning can be realized, and the installation is convenient; meanwhile, a limiting plate is arranged below the base, a limiting groove is formed in the annular groove, and the limiting of the reactor is realized through the cooperation of the positioning column and the positioning hole; through the cooperation of inclined plane structure and direction sloping block on the annular fixing base, utilize self gravity of reactor to drive the removal of location post, realize automatic positioning, simple structure, simple to operate. In summary, the invention has the characteristics of reducing potential safety hazard and improving installation efficiency.
In addition, through the cover establish temperature measuring device on high-voltage reactor and capacitive divider's external electric wire connector, both can carry out real-time supervision to the temperature of joint department, can play fixed guard action again to joint and electric wire plug, prevent external interference, guarantee the normal clear of detection.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic diagram of a card holder;
FIG. 3 is a schematic structural view of a base;
FIG. 4 is a circuit diagram of the present invention;
FIG. 5 is a schematic structural view of the temperature measuring device;
FIG. 6 is a control diagram of the temperature measuring device.
The marks in the drawings are: the high-voltage direct-current power supply comprises a 1-high-voltage direct-current power supply, a 2-high-voltage switch, a 3-high-voltage reactor, a 4-capacitance voltage divider, a 5-data acquisition and analysis unit, a 6-partial discharge coupling unit, a 7-base, an 8-clamping seat, a 9-temperature measuring device, a 701-base, a 702-annular fixed seat, a 703-inclined surface structure, a 704-limiting plate, a 705-locating hole, a 706-telescopic rod, a 707-spring, a 708-rubber insulating layer, a 709-locating strip, a 801-annular groove, an 802-limiting groove, a 803-baffle, a 804-locating column, a 805-guide inclined block, a 806-reset spring, a 807-locating groove, a 9-temperature measuring device, a 901-sleeve, a 902-elastic sheath, a 903-inner liner, a 904-temperature sensor, a 905-microprocessor, a 906-wireless transmitter, a 907-annular groove, a 908-heated expansion strip and a 909-pressure sensor.
Detailed Description
The invention is further illustrated by the following figures and examples, which are not intended to be limiting.
Examples. The high-voltage cable oscillating wave partial discharge test system is shown in fig. 1 to 6, and comprises a high-voltage direct-current power supply 1, a high-voltage switch 2, a high-voltage reactor 3, a capacitive voltage divider 4, a data acquisition and analysis unit 5 and a partial discharge coupling unit 6, wherein the bottom of the high-voltage reactor 3 is provided with a base 7, and the top end of the high-voltage reactor 3 is provided with a clamping seat 8; the base 7 comprises a base 701 fixed with the high-voltage reactor 3, two symmetrically arranged annular fixing seats 702 are arranged below the base 701, inclined structures 703 are arranged at two ends of the annular fixing seats 702, a limiting plate 704 is arranged between the annular fixing seats 702, positioning holes 705 are formed in two end faces of the limiting plate 704, a telescopic rod 706 is arranged between the limiting plate 704 and the base 701, and springs 707 are sleeved on the telescopic rod 706.
The lower surface of the annular fixed seat 702 is provided with a rubber insulating layer 708, and the surface of the insulating rubber layer 708 is provided with frosted grains.
The clamping seat 8 is provided with an annular groove 801 corresponding to the annular fixed seat 702, the annular groove 801 is provided with a limit groove 802 corresponding to the limit plate 704, two ends of the limit groove 802 are provided with baffle plates 803, the baffle plates 803 are provided with positioning columns 804, the end parts of the positioning columns 804 are provided with guide inclined blocks 805 corresponding to the inclined surface structures 703, and return springs 806 are arranged between the guide inclined blocks 805 and the baffle plates 803.
The outer wall of the annular fixing seat 702 is also provided with a positioning strip 709, and the inner wall of the annular groove 801 is provided with a positioning groove 807 corresponding to the positioning strip 709.
The data acquisition and analysis unit 5 is also connected with a memory and a display screen; the data acquisition and analysis unit 5 is respectively connected with the high-voltage direct-current power supply 1, the high-voltage switch 2 and the partial discharge coupling unit 6; the output end of the high-voltage direct-current power supply 1 is connected with the input ends of the high-voltage switch 2 and the high-voltage reactor 3; the output end of the high-voltage reactor 3 is respectively connected with the input end of the capacitive voltage divider 4 and a tested cable; the output end of the capacitive voltage divider 4 is connected with the input end of the partial discharge coupling unit 6.
The data acquisition and analysis unit 5 is also connected with a memory and a display screen; the data acquisition and analysis unit 5 is respectively connected with the high-voltage direct-current power supply 1, the high-voltage switch 2 and the partial discharge coupling unit 6; the output end of the high-voltage direct-current power supply 1 is connected with the input ends of the high-voltage switch 2 and the high-voltage reactor 3; the output end of the high-voltage reactor 3 is respectively connected with the input end of the capacitive voltage divider 4 and a tested cable; the output end of the capacitive voltage divider 4 is connected with the input end of the partial discharge coupling unit 6.
The temperature measuring device 9 is sleeved on the external wire connection head of the high-voltage reactor 3 and the capacitive voltage divider 4; the temperature measuring device 9 comprises a sleeve 901 arranged outside the middle joint, two ends of the inner wall of the sleeve 901 are respectively provided with an elastic sheath 902, and an inner liner 903 is arranged in the elastic sheath 902; the inner side of the middle part of the sleeve 901 is provided with a temperature sensor 904, the temperature sensor 904 is connected with a microprocessor 905, and the microprocessor 905 is connected with a wireless transmitter 906; an annular groove 907 is arranged on the outer wall of the sleeve 901, and a thermal expansion strip 908 is embedded in the annular groove 907.
A pressure sensor 909 is arranged between the annular groove 907 and the heated expansion strip 908, and the pressure sensor 909 is connected with a microprocessor 905.
The lining pipe 3 is a supporting strip with a spiral structure. The elastic sheath is a cold-shrink sheath used in a common cold-shrink cable joint manufacturing process, and is formed by injecting and vulcanizing silicone rubber in a factory.
The annular groove 7 is also internally provided with a mounting groove, and button batteries are arranged in the mounting groove and are respectively connected with a microprocessor 905, a temperature sensor 904 and a pressure sensor 909 and a wireless transmitter 906.
When the electric wire connector is used, one end of the sleeve 901 is sleeved on one of the electric wire connectors, the position of the sleeve is adjusted after the electric wire connector is clamped with the other connecting plug, the inner lining pipe is pulled out, the elastic sheath is tightly attached to the plug and the electric wire connector, and then the temperature of the joint of the plug can be monitored. The temperature sensor transmits the temperature of the intermediate joint detected in real time to the microprocessor, the microprocessor transmits the temperature to the control center through the wireless transmitter, the pressure sensor transmits the pressure of the heated expansion strip to the microprocessor, and the microprocessor transmits the pressure to the control center through the wireless transmitter. When the temperature of intermediate head is too high, control center can know corresponding condition in the first time, and temperature sensor's temperature rises, and the expansion strip of being heated can expand simultaneously, and pressure sensor receives also can increase, and the two combine each other, can prevent to appear the phenomenon of misinformation. After the heated expansion strip is heated and expanded, gaps are formed between the elastic tube coated outside the middle joint and the middle joint, so that air flow is increased, and the temperature is reduced.
During testing, the tested cable is charged through the high-voltage direct-current power supply (the time is less than 2 seconds), the tested cable is charged to a preset voltage, the IGBT high-voltage switch is closed, the tested cable and the high-voltage resistor form a series resonant circuit, a sinusoidal oscillation voltage with lower damping required by testing can be generated on the tested cable, the returned oscillation wave is received through the capacitive voltage divider, the returned oscillation wave is processed through the partial discharge coupling unit, the filter and the like and is transmitted to the data analysis acquisition unit, and the data analysis acquisition unit calculates and analyzes detected data to obtain the partial discharge amount, the partial discharge concentration degree and the position of the tested cable, stores the data and displays the data on the liquid crystal display screen.
The high pressure is 110Kv or more.
The data acquisition and analysis unit comprises a data acquisition unit, an AD converter and a data analysis microprocessor.
The height of the limiting plate is half of that of the annular fixing seat, the longest expansion range of the expansion link is 1 time that of the annular fixing seat, and the stroke of the spring is consistent with that of the limiting plate. The initial state of the limiting plate is that the upper end of the limiting plate is leveled with the lower end of the annular fixing seat.
The working process of the invention comprises the following steps: when the upper high-voltage reactor and the lower high-voltage reactor are overlapped, the base at the lower end of the upper high-voltage reactor is matched with the clamping seat at the upper end of the lower high-voltage reactor, so that the upper high-voltage reactor and the lower high-voltage reactor are fixedly connected.
And a chute is arranged on the inner wall of the annular groove and is used for sliding the guide inclined block.
The positioning strip on the outer wall of the annular fixing seat is clamped with the positioning groove on the inner wall of the annular groove, so that the positioning between the base and the clamping seat is realized, and then the annular fixing seat below the base is inserted into the annular groove, so that the clamping of the upper and lower high-voltage reactors is realized. The annular fixing seat is in the decline in-process, and inclined plane structure cooperatees with the direction sloping block to drive the direction sloping block and remove, the direction sloping block drives the reference column and removes, thereby makes the reference column and the locating hole looks block on the limiting plate (because the limiting plate receives the effect of spring force, during initial state, the limiting plate is located the below of annular fixing seat, consequently, the limiting plate gets into the spacing inslot before annular fixing seat), realizes the location.
When the high-voltage reactor is dismounted, the high-voltage reactor at the upper part is lifted upwards to drive the annular fixed seat and the telescopic rod at the upper end of the limiting plate to move upwards, and the limiting plate is continuously kept in place due to the fixing influence of the positioning column; then along with annular fixing base rises, inclined plane structure and direction sloping block phase separation, and the direction sloping block will return under the effect of spring force to drive the reference column shrink, make reference column and limiting plate phase separation, the limiting plate rises under the effect of spring force, accomplishes the demolishs the operation.
Claims (5)
1. The utility model provides a test system is put in office to high voltage cable oscillatory wave, includes high voltage direct current power supply (1), high voltage switch (2), high-voltage reactor (3), capacitive divider (4), data acquisition analysis unit (5) and office put coupling unit (6), its characterized in that: a base (7) is arranged at the bottom of the high-voltage reactor (3), and a clamping seat (8) is arranged at the top end of the high-voltage reactor (3); the base (7) comprises a base (701) fixed with the high-voltage electric reactor (3), two symmetrically arranged annular fixing seats (702) are arranged below the base (701), two ends of each annular fixing seat (702) are of inclined structures (703), limiting plates (704) are arranged between the annular fixing seats (702), positioning holes (705) are formed in two end faces of each limiting plate (704), a telescopic rod (706) is arranged between each limiting plate (704) and the base (701), and springs (707) are sleeved on the telescopic rods (706);
the lower surface of the annular fixed seat (702) is provided with a rubber insulating layer (708), and the surface of the insulating rubber layer (708) is provided with frosted grains;
the clamping seat (8) on be equipped with ring channel (801) corresponding with annular fixing base (702), be equipped with on ring channel (801) with limiting plate (704) corresponding spacing groove (802), limiting groove (802) both ends are equipped with baffle (803), be equipped with reference column (804) on baffle (803), reference column (804) tip is equipped with direction sloping block (805) corresponding with inclined plane structure (703), be equipped with reset spring (806) between direction sloping block (805) and baffle (803).
2. The high-voltage cable oscillatory wave partial discharge test system as claimed in claim 1, wherein: the outer wall of the annular fixing seat (702) is also provided with a positioning strip (709), and the inner wall of the annular groove (801) is provided with a positioning groove (807) corresponding to the positioning strip (709).
3. The high-voltage cable oscillatory wave partial discharge test system as claimed in claim 1, wherein: the data acquisition and analysis unit (5) is also connected with a memory and a display screen; the data acquisition and analysis unit (5) is respectively connected with the high-voltage direct-current power supply (1), the high-voltage switch (2) and the partial discharge coupling unit (6); the output end of the high-voltage direct-current power supply (1) is connected with the input ends of the high-voltage switch (2) and the high-voltage reactor (3); the output end of the high-voltage reactor (3) is respectively connected with the input end of the capacitive voltage divider (4) and the tested cable; the output end of the capacitive voltage divider (4) is connected with the input end of the partial discharge coupling unit (6).
4. The high-voltage cable oscillatory wave partial discharge test system as claimed in claim 1, wherein: the external wire connector of the high-voltage reactor (3) and the capacitive voltage divider (4) is sleeved with a temperature measuring device (9); the temperature measuring device (9) comprises a sleeve (901) arranged outside the middle joint, two ends of the inner wall of the sleeve (901) are respectively provided with an elastic sheath (902), and an inner liner tube (903) is arranged in the elastic sheath (902); the inner side of the middle part of the sleeve (901) is provided with a temperature sensor (904), the temperature sensor (904) is connected with a microprocessor (905), and the microprocessor (905) is connected with a wireless transmitter (906); an annular groove (907) is formed in the outer wall of the sleeve (901), and a heated expansion strip (908) is embedded in the annular groove (907).
5. The high-voltage cable oscillatory wave partial discharge test system as claimed in claim 4, wherein: a pressure sensor (909) is arranged between the annular groove (907) and the heated expansion strip (908), and the pressure sensor (909) is connected with a microprocessor (905).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711000290.XA CN107797039B (en) | 2017-10-24 | 2017-10-24 | High-voltage cable oscillating wave partial discharge test system |
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| CN201711000290.XA CN107797039B (en) | 2017-10-24 | 2017-10-24 | High-voltage cable oscillating wave partial discharge test system |
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| CN107797039A CN107797039A (en) | 2018-03-13 |
| CN107797039B true CN107797039B (en) | 2023-05-09 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109342910B (en) * | 2018-11-29 | 2020-09-08 | 国网陕西省电力公司电力科学研究院 | Full-electric partial discharge detection device and detection method |
| CN110596548A (en) * | 2019-09-20 | 2019-12-20 | 国网天津市电力公司 | Low-power-consumption power cable insulation online monitoring system |
| CN112946437B (en) * | 2021-02-03 | 2022-02-08 | 广州高力电缆附件有限公司 | Monitoring type cable intermediate head |
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