CN111650484A - Composite insulator temperature rise test device and test method - Google Patents
Composite insulator temperature rise test device and test method Download PDFInfo
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- CN111650484A CN111650484A CN202010530829.8A CN202010530829A CN111650484A CN 111650484 A CN111650484 A CN 111650484A CN 202010530829 A CN202010530829 A CN 202010530829A CN 111650484 A CN111650484 A CN 111650484A
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- 239000012212 insulator Substances 0.000 title claims abstract description 88
- 239000002131 composite material Substances 0.000 title claims abstract description 82
- 238000012360 testing method Methods 0.000 title claims abstract description 69
- 238000010998 test method Methods 0.000 title claims abstract description 9
- 229910052782 aluminium Inorganic materials 0.000 claims description 24
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 24
- 239000011888 foil Substances 0.000 claims description 24
- 229910001220 stainless steel Inorganic materials 0.000 claims description 20
- 239000010935 stainless steel Substances 0.000 claims description 20
- 230000003014 reinforcing effect Effects 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 230000007613 environmental effect Effects 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 10
- 238000001514 detection method Methods 0.000 description 9
- 239000005030 aluminium foil Substances 0.000 description 6
- 239000003351 stiffener Substances 0.000 description 5
- 230000001681 protective effect Effects 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
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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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
- G01J5/0205—Mechanical elements; Supports for optical elements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
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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
- G01R31/1218—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing using optical methods; using charged particle, e.g. electron, beams or X-rays
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J2005/0077—Imaging
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- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Insulators (AREA)
Abstract
The invention discloses a composite insulator temperature rise test device and a test method, which comprise a temperature rise test tool frame and a power frequency boosting device, wherein the power frequency boosting device comprises a control operation platform, a voltage regulator, a boosting transformer and a capacitive voltage divider, the voltage regulator is respectively and electrically connected with the control operation platform and the boosting transformer, the boosting transformer is connected with the temperature rise test tool frame through a protection resistor, the capacitive voltage divider connected with the temperature rise test tool frame in parallel is arranged at the rear part of the protection resistor, the upper end of a composite insulator is electrically connected with the temperature rise test tool frame, the lower end of the composite insulator is in short circuit grounding, and the lower end of the temperature rise test. According to the invention, the temperature rise test tool rack is utilized to simultaneously carry out the temperature rise test on a plurality of insulators, line voltage is applied to the composite insulator sample in advance in the test process, the temperature of the composite insulator sample is rapidly raised, and the voltage is reduced to the operation phase voltage after the composite insulator sample is stabilized until the temperature of the composite insulator sample is stabilized.
Description
Technical Field
The invention relates to the technical field of composite insulator test detection, in particular to a device and a method for testing temperature rise of a composite insulator of 220kV or below.
Background
With the rapid development of power grids in China, particularly the construction and development of extra-high voltage alternating current and direct current, in a power transmission line, a composite insulator is widely used in the power grids due to the excellent pollution flashover resistance characteristic, with the increase of the number of the composite insulator used, the rectangular network access detection and the sampling detection after the composite insulator operates for a period of time are needed, the detection in the current insulator temperature rise test process mainly adopts a single hanging point, the detection number is very limited, and in the temperature rise test process, the operating phase voltage is applied to a composite insulator sample, so that the temperature excitation time is slow, the temperature rise test process is long, the detection efficiency is low, and the labor intensity of an operator is high.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a composite insulator temperature rise test device.
The invention also provides a temperature rise test method of the composite insulator.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the utility model provides a composite insulator temperature rise test device, includes temperature rise test frock frame, power frequency booster unit includes control operation panel, voltage regulator, step up transformer, capacitive voltage divider, and the voltage regulator is connected with control operation panel, step up transformer respectively, and step up transformer passes through protection resistor and is connected with temperature rise test frock frame electricity, is equipped with the capacitive voltage divider parallelly connected with temperature rise test frock frame at the protection resistor rear portion, and the composite insulator upper end is connected with temperature rise test frock frame top, composite insulator lower extreme and temperature rise test frock frame lower extreme short circuit ground connection.
Capacitive voltage divider passes through the inside pressurization wire of the flexible pipe of aluminium foil line and is connected with the temperature rise test frock frame, and the flexible pipe of aluminium foil line is equipped with the steel wire and does the skeleton including adopting the aluminium foil to encircle the two-layer aluminium foil of preparation in the middle of the two-layer aluminium foil, and the pressurization wire passes from the centre, and the flexible pipe of aluminium foil line can freely stretch out and draw back according to the sample distance.
And a temperature measuring mechanism is arranged on one side of the temperature rise test tool rack, the temperature measuring mechanism is a thermal infrared imager, and the thermal infrared imager is connected with the control operation platform.
The voltage regulator adopts 300kVA, the step-up transformer adopts 300kVA/300kV, the capacitive voltage divider adopts 300kV, and the protective resistor adopts 30k omega.
The temperature rise test tool rack comprises vertical supporting legs and a composite insulator connecting frame connected with the upper ends of the supporting legs, the supporting legs are insulating rods, and the composite insulator connecting frame is a rectangular or circular ring closed stainless steel support.
And the composite insulator connecting frame is connected with a grading ring, and the grading ring adopts a fan-shaped structure.
A certain number of ball sockets are hung on the stainless steel support, the ball sockets are connected with the high-voltage end ball heads of the composite insulators, and the positions of the ball sockets on the stainless steel support can be adjusted.
The lower part of the supporting leg is provided with a reinforcing rod connected with the supporting leg between the supporting legs, the reinforcing rod is made of stainless steel materials, and the reinforcing rod is grounded.
Four universal wheels are arranged at the lower part of the supporting leg for moving conveniently.
A temperature rise test method for a composite insulator comprises the following steps:
A. one or more groups of composite insulators are matched with a ball head at the high-voltage end of the composite insulator through a ball socket on a stainless steel bracket and hung on a temperature rise test tool rack, so that the composite insulator naturally sags, the lower end of the composite insulator is connected with a grounding wire, and the environmental temperature and the sample temperature T are recorded11、T12；
B. The method comprises the steps of reliably connecting a capacitive voltage divider in a booster device with a temperature rise test tool rack through an aluminum foil corrugated expansion pipe and an internal lead, applying an operation line voltage to a sample in advance through the booster device, maintaining the pressurization time for about 30min, quickly increasing the temperature in advance, observing the temperature condition through a thermal infrared imager, and recording the temperature T of the environment and the temperature T of the sample21、T22；
C. Temperature T of sample to be tested22The sample temperature is in a descending trend when the sample temperature is not increased continuously or the increasing rate is slow, and then the voltage is reduced to the sample operation phase voltage for continuous operation, and the sample temperature is not increased after a period of timeIf the change is small, the temperature rise of the sample is considered to reach a stable value, and the temperature value T of the environment and the sample at the moment is recorded by the thermal infrared imager31、T32；
D. Then calculating the temperature rise value T ═ T of the sample32-T31。
The invention has the beneficial effects that:
1. the invention can simultaneously carry out temperature rise test on a plurality of composite insulators with the same model by utilizing the insulator tool frame, solves the problem that only one sample can be tested each time in the prior art, has more accurate and effective transverse comparison of test data of the composite insulators in the same batch, avoids data difference caused by external environmental factor change, applies line voltage to the composite insulator sample in advance in the test process, quickly raises the temperature of the composite insulator sample, and reduces the voltage to the operation phase voltage until the temperature of the composite insulator sample is stable after the temperature is stabilized. Specifically, the method comprises the steps of hanging one or more composite insulator samples on a temperature rise test tool rack, applying line voltage to the composite insulator samples in advance through a power frequency voltage-withstanding device to maintain for 30min, rapidly increasing the temperature of the composite insulator samples in advance, observing the temperature condition through a thermal infrared imager, reducing the voltage to the running phase voltage of the composite insulator samples to continue running if the temperature of the composite insulator increases slowly or does not increase, and considering that the running phase voltage of the composite insulator samples reaches a stable state until the temperature rise change amplitude of the composite insulator samples is small or unchanged, wherein the process is about 30min approximately, the existing conventional temperature rise test method generally consumes about 120min, and the test method can improve the detection efficiency by one time.
2. In order to avoid the temperature change caused by corona effect, fan-shaped equalizing rings are connected to the periphery of the composite insulator connecting frame, and the equalizing rings are of fan-shaped structures.
3. The aluminum foil line telescopic pipe is characterized in that aluminum foils are used for manufacturing two layers of aluminum foils in a surrounding mode, a steel wire is used as a framework, a lead penetrates through the middle of the aluminum foils, and the aluminum foils can freely stretch according to the distance.
4. And a temperature measuring mechanism is arranged on one side of the temperature rise test tool rack and is a thermal infrared imager.
5. The lower part of the supporting leg is provided with a reinforcing rod connected with the supporting leg between the supporting legs, the reinforcing rod is made of stainless steel materials, and the reinforcing rod is grounded. Through being equipped with the stiffener to and adopt stiffener ground connection measure, can improve the overall stability and the intensity of temperature rise test frock frame, guarantee the fail safe nature that the operator test was used, avoid the potential safety hazard.
7. The ball sockets with a certain number are hung on the stainless steel support, the ball head at the high-voltage end of the composite insulator is connected with the ball sockets, and the positions of the ball sockets on the stainless steel support can be adjusted according to requirements, so that the labor intensity and time of an operator are greatly reduced, and the detection work efficiency is obviously improved.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic structural view of a temperature rise test tool rack;
FIG. 3 is a schematic view of an aluminum foil bellows structure.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments.
In the description of the present invention, the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "vertical", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for the purpose of describing the present invention but do not require that the present invention must be constructed or operated in a specific orientation, and thus, should not be construed as limiting the present invention. The terms "connected" and "connected" in the present invention should be interpreted broadly, and may be connected or disconnected, for example; the terms may be directly connected or indirectly connected through intermediate components, and specific meanings of the terms may be understood as specific conditions by those skilled in the art.
As shown in fig. 1-3, a composite insulator temperature rise test device, including temperature rise test tool rack, power frequency step-up device includes control operation platform, voltage regulator, step-up transformer, capacitive voltage divider, and the voltage regulator is connected with control operation platform, step-up transformer respectively, and step-up transformer passes through protection resistor and is connected with the temperature rise test tool rack, is equipped with the capacitive voltage divider that connects in parallel with the temperature rise test tool rack at protection resistor rear portion, and the composite insulator upper end is connected with temperature rise test tool rack top, and composite insulator lower extreme and temperature rise test tool rack lower extreme ground connection.
The capacitive voltage divider is connected with the temperature rise test tool rack through the aluminum foil line telescopic pipe and the internal pressurizing lead, the aluminum foil line telescopic pipe comprises two layers of aluminum foils which are manufactured by aluminum foil surrounding, a steel wire is arranged in the middle of the two layers of aluminum foils to serve as a framework, the pressurizing lead penetrates through the middle of the two layers of aluminum foils, and the aluminum foil line telescopic pipe can freely stretch according to the distance of a composite insulator sample. The length of the aluminum foil pattern telescopic pipe is determined according to the distance between a capacitive voltage divider and a composite insulator sample, and the length is generally 5m, and the diameter is 200mm2。
And a temperature measuring mechanism is arranged on one side of the temperature rise test tool rack, the temperature measuring mechanism is a thermal infrared imager, and the thermal infrared imager is electrically connected with the control operation platform. The temperature is displayed and set by controlling the operating platform, the thermal infrared imager adopts FLIR T660, and the parameters are set as follows: the emissivity is 0.95, and the detection distance is 5 meters.
The voltage regulator adopts 300kVA, the step-up transformer adopts 300kVA/300kV, the capacitive voltage divider adopts 300kV, and the protective resistor adopts 30k omega.
The temperature rise test tool rack comprises vertical supporting legs and a composite insulator connecting frame connected with the upper ends of the supporting legs, and the supporting legs are insulating rods. Such as an epoxy draw bar, having a diameter of 30mm and a length of 300 cm.
The composite insulator connecting frame is a stainless steel bracket with a rectangular structure. The stainless steel bracket with the rectangular structure is 2.5m long and 1.8m wide.
The composite insulator connecting frame is connected with a grading ring, the grading ring is of a fan-shaped structure, and the diameter of the fan-shaped grading ring is 30 cm.
A certain number of ball sockets are hung on the stainless steel bracket and are connected with the high-voltage end ball head of the composite insulator. The position of the ball socket on the stainless steel bracket can be adjusted.
And a reinforcing rod connected with the supporting legs is arranged between the supporting legs at the lower parts of the supporting legs. The stiffener is stainless steel material stiffener, stiffener ground connection. And a certain number of insulators are hung on the temperature rise test tool frame according to hanging points, the low-voltage side of each insulator is in short circuit grounding, and meanwhile, the lower-end stainless steel support is grounded. Required voltage is applied to the composite insulator connecting frame through the control operation platform, the upper end metal support belongs to the same potential, and the purpose of simultaneously detecting all the peripheral insulators is achieved.
Four universal wheels are arranged at the lower part of the supporting leg for moving conveniently.
A temperature rise test method for a composite insulator comprises the following steps:
A. one or more groups of composite insulators are matched with a ball head at the high-voltage end of the composite insulator through a ball socket on a stainless steel bracket and hung on a temperature rise test tool rack, so that the composite insulator naturally sags, the lower end of the composite insulator is connected with a grounding wire, and the environmental temperature and the sample temperature T are recorded11、T12；
B. The method comprises the steps of reliably connecting a capacitive voltage divider in a voltage booster with a temperature rise test tool rack through an aluminum foil corrugated expansion pipe and an internal pressurization lead, applying an operation line voltage to a sample in advance through the voltage booster, maintaining the pressure test for about 30min, rapidly increasing the temperature in advance, observing the temperature condition through a thermal infrared imager, and recording the temperature T of the environment and the temperature T of the sample if the temperature of the composite insulator is slowly increased or not increased21、T22；
C. Temperature T of sample to be tested22The temperature of the sample is in a descending trend, the temperature of the sample reaches a stable value after the temperature of the sample is not changed or changed slightly after a period of time, and the environment and sample temperature value T at the moment are recorded by a thermal infrared imager31、T32；
D. Then calculating the temperature rise value T ═ T of the sample32-T31。
The following description will be made by taking a 220kV composite insulator as an example: after the composite insulator sample is prepared to have a pressurizing condition, firstly applying the highest operation line voltage 252kV of a 220kV system to the composite insulator sample, operating for about 30min after a period of time, observing the temperature of the composite insulator sample by using a thermal infrared imager, then reducing the voltage to the phase voltage 146kV, and continuing operating, wherein the temperature change is less than 1 ℃ within 10min, and then considering that the temperature rise reaches thermal balance.
The above description is of the preferred embodiment of the present invention, and the description of the specific embodiment is only for better understanding of the idea of the present invention. It will be appreciated by those skilled in the art that various modifications and equivalents may be made in accordance with the principles of the invention and are considered to be within the scope of the invention.
Claims (10)
1. The utility model provides a composite insulator temperature rise test device, includes temperature rise test frock frame, power frequency booster unit includes control operation platform, voltage regulator, step up transformer, capacitive voltage divider, and the voltage regulator is connected with control operation platform, step up transformer respectively, and step up transformer passes through protection resistor and is connected with the temperature rise test frock frame, is equipped with the capacitive voltage divider parallelly connected with the temperature rise test frock frame at protection resistor rear portion, and composite insulator upper end is connected with the temperature rise test frock frame, lower extreme and temperature rise test frock frame lower extreme short circuit ground connection.
2. The temperature rise test device for the composite insulator according to claim 1, wherein the capacitive voltage divider is connected with the temperature rise test tool rack through an aluminum foil pattern telescopic tube and an internal pressurizing wire, the aluminum foil pattern telescopic tube comprises two layers of aluminum foils made by surrounding aluminum foils, a steel wire is arranged between the two layers of aluminum foils to serve as a framework, the pressurizing wire penetrates through the middle of the two layers of aluminum foils, and the aluminum foil pattern telescopic tube is freely adjusted according to the sample distance.
3. The temperature-rise test device for the composite insulator, according to claim 1, wherein a temperature measuring mechanism is arranged on one side of the temperature-rise test tool rack, the temperature measuring mechanism is a thermal infrared imager, and the thermal infrared imager is connected with the control operation platform.
4. The temperature rise test device for the composite insulator according to claim 1, wherein the voltage regulator adopts a voltage regulator of 300kVA, the step-up transformer adopts 300kVA/300kV, the capacitive voltage divider adopts 300kV, and the protection resistor adopts 30 kOmega.
5. The composite insulator temperature rise test device according to claim 1, wherein the temperature rise test tool rack comprises vertical support legs and a composite insulator connecting rack connected with the upper ends of the support legs, the support legs are insulating rods, and the composite insulator connecting rack is a rectangular or circular ring closed stainless steel support.
6. The temperature rise test device for the composite insulator according to claim 5, wherein the composite insulator connecting frame is connected with a grading ring, and the grading ring is of a fan-shaped structure.
7. The composite insulator temperature rise test device according to claim 5, wherein a certain number of ball sockets are suspended on the stainless steel bracket, the ball sockets are connected with the high-voltage end ball heads of the composite insulators, and the positions of the ball sockets on the stainless steel bracket can be adjusted.
8. The temperature rise test device for the composite insulator according to claim 5, wherein a reinforcing rod connected with the supporting leg is arranged between the supporting legs at the lower part of the supporting legs, the reinforcing rod is made of stainless steel materials, and the reinforcing rod is grounded.
9. The temperature rise test device for the composite insulator according to claim 5, wherein four universal wheels are provided at the lower part of the supporting leg for facilitating movement.
10. A temperature rise test method for a composite insulator comprises the following steps:
A. one or more groups of composite insulators are matched with a ball head at the high-voltage end of the composite insulator through a ball socket on a stainless steel bracket and hung on a temperature rise test tool rack, so that the composite insulator naturally sags, the lower end of the composite insulator is connected with a grounding wire, and the environmental temperature and the sample temperature T are recorded11、T12；
B. Reliably connecting a capacitive voltage divider in a pressure boosting device with a temperature rise test tool rack through an aluminum foil corrugated expansion pipe, applying running line voltage to a sample in advance through the pressure boosting device, maintaining the pressure test for about 30min, quickly increasing the temperature in advance, observing the temperature condition through a thermal infrared imager, and recording the temperature T of the environment and the temperature T of the sample21、T22；
C. Temperature T of sample to be tested22The temperature of the sample is in a descending trend, the temperature of the sample reaches a stable value after the temperature of the sample is not changed or changed slightly after a period of time, and the environment and sample temperature value T at the moment are recorded by a thermal infrared imager31、T32；
D. Then calculating the temperature rise value T ═ T of the sample32-T31。
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112379260A (en) * | 2020-12-07 | 2021-02-19 | 江苏省电力试验研究院有限公司 | Rapid temperature rise test method and platform for switch equipment |
| CN112881875A (en) * | 2021-01-18 | 2021-06-01 | 国网天津市电力公司电力科学研究院 | Cable buffer layer repairing effect measuring device based on capacitance current analysis |
| CN113125914A (en) * | 2021-05-11 | 2021-07-16 | 广西电网有限责任公司电力科学研究院 | Test platform for water diffusion test of composite insulator with jacket core rod |
| CN113504263A (en) * | 2021-06-24 | 2021-10-15 | 海南电网有限责任公司电力科学研究院 | Insulator abnormal heating defect detection device and application method thereof |
| CN113835006A (en) * | 2021-09-24 | 2021-12-24 | 南方电网科学研究院有限责任公司 | Method and device for testing step temperature rise test of thermosetting epoxy insulating part and application |
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| CN112881875A (en) * | 2021-01-18 | 2021-06-01 | 国网天津市电力公司电力科学研究院 | Cable buffer layer repairing effect measuring device based on capacitance current analysis |
| CN112881875B (en) * | 2021-01-18 | 2022-07-26 | 国网天津市电力公司电力科学研究院 | Cable buffer layer repairing effect measuring device based on capacitance current analysis |
| CN113125914A (en) * | 2021-05-11 | 2021-07-16 | 广西电网有限责任公司电力科学研究院 | Test platform for water diffusion test of composite insulator with jacket core rod |
| CN113125914B (en) * | 2021-05-11 | 2022-07-12 | 广西电网有限责任公司电力科学研究院 | Test platform for water diffusion test of composite insulator with jacket core rod |
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