CN111624431A - GIS solid insulation multi-sample three-factor aging test device and test method - Google Patents
GIS solid insulation multi-sample three-factor aging test device and test method Download PDFInfo
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
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- 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
- G01R31/1254—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 gas-insulated power appliances or vacuum gaps
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Abstract
The invention belongs to the technical field of power equipment aging tests, and discloses a GIS solid insulation multi-sample three-factor aging test device and a test method. The device comprises: the test box is used for providing the experimental environment, and the sample support is used for loading the sample, still includes: the device comprises a temperature control module, a vibration module, a pressurization module and a test module; the temperature control module is used for heating a sample and monitoring the temperature; the vibration module is used for providing different vibration intensities and monitoring vibration: the pressurizing module is used for providing voltage and monitoring the voltage; the test module is used for monitoring the aging state of the sample. The test device can perform multi-sample, single-factor or multi-factor accelerated aging test on the GIS solid insulating material. The three aging factors, namely electric field, heat and mechanical vibration parameters can be freely adjusted and combined according to aging requirements.
Description
Technical Field
The invention belongs to the technical field of power equipment aging tests, and particularly relates to a GIS solid insulation multi-sample three-factor aging test device and a test method.
Background
Solid insulation for Gas Insulated Switchgear (GIS) is an important component to ensure its reliability and is usually made of polymer-based composite insulation materials. In the operation process of equipment, GIS solid insulation can be influenced by factors such as electricity, heat, force and the like to cause performance degradation, and the reliability of the whole GIS and even a power system is influenced. Especially, in recent years, the voltage grade is continuously improved, and higher requirements are put on the reliability of GIS solid insulation. Therefore, the state evaluation and the life evaluation of the GIS solid insulation are very important.
However, in general, the service life of the polymer-based composite material is long, which is not beneficial to service life evaluation, so that an artificial accelerated aging device needs to be set up in a laboratory for accelerated aging test, and then a corresponding service life model is used for service life evaluation. An aging device and a corresponding aging test method are designed according to the GIS solid insulation working environment, and the method is a common and effective service life assessment means. However, the existing aging device is not flexible enough to simulate only one or several aging factors at the same time, and the combination and disassembly of the aging factors cannot be carried out. For example, chinese patent CN201510600286.1 only addresses epoxy resin materials of GIS basin-type insulators, and the application range is too small. Moreover, the conventional multi-factor aging test device generally has the problem of small aged sample capacity, so that the final obtained result is not accurate enough, and the transverse contrast test cannot be simultaneously performed. Therefore, the aging test device which can flexibly combine and regulate the aging factors and can simultaneously carry out the aging test of multiple samples is designed and developed, and the aging test device has important significance.
Disclosure of Invention
The invention aims to provide a GIS solid insulation multi-sample three-factor aging test device and a test method, which are used for solving the problems that the existing multi-factor aging test device cannot combine and disassemble aging factors and has small sample capacity and low result accuracy.
In order to realize the task, the invention adopts the following technical scheme:
the utility model provides a three factor aging test devices of many samples of GIS solid insulation, includes: the test box is used for providing a test environment, and the sample support is used for loading the sample, and the test box and the sample support still include: the device comprises a temperature control module, a vibration module, a pressurization module and a test module;
the temperature control module is used for heating a sample and monitoring the temperature;
the vibration module is used for providing different vibration intensities and monitoring vibration;
the pressurizing module is used for providing voltage and monitoring the voltage;
the test module is used for monitoring the aging state of the sample.
Furthermore, the test box is filled with insulating oil, and an oil outlet is formed in the test box;
the number of the sample supports is one or more, each group of sample supports comprises an electrode support and a base, the electrode supports are arranged on the base, and a plurality of electrodes are arranged on the electrode supports;
the temperature control module comprises a heater, a thermocouple and a temperature controller, the heater and the thermocouple are arranged in the test box, and the temperature controller is arranged outside the test box and is connected with the heater and the thermocouple through leads;
the vibration module comprises a vibration exciter, a vibration sensor and a vibration acceleration monitoring device, the vibration exciter is arranged below the test box, and the vibration sensor is arranged at the bottom of the test box and is connected with the vibration acceleration monitoring device through a lead;
the pressurizing module is arranged outside the test box and comprises a power supply, a voltage divider, a voltage sensor and a voltage monitor which are connected with each other, and the voltage divider and the voltage sensor are respectively connected with the electrodes through leads;
the test module comprises a partial discharge test system and a dielectric loss and capacitance test system, and the two test systems are connected with the electrodes through leads.
Further, 12 electrodes are arranged on the electrode bracket.
A GIS solid insulation multi-sample three-factor aging test method is implemented by using any one of the GIS solid insulation multi-sample three-factor aging test devices according to the following steps:
step 1: mounting a sample to be aged on a sample support, so that the sample and the electrode are immersed in insulating oil and no bubbles exist on the surfaces of the electrode and the sample;
step 2: selecting any one module, any two modules or all of a temperature control module, a vibration module and a pressurization module as modules required by an aging test;
and step 3: setting a plurality of execution cycles, carrying out the aging test according to the steps from 3.1 to 3.2 in each execution cycle, and stopping the aging test when the voltage monitor detects the breakdown voltage if the selected module comprises a pressurizing module (5); if the selected module does not contain the pressurizing module (5), stopping the aging test after all execution cycles are finished;
step 3.1: performing an aging test according to the selected module required by the aging test, wherein if the temperature control module is selected, the required temperature is obtained according to the aging requirement, the heating pipe is opened through the temperature controller to heat the insulating oil until the temperature of the insulating oil monitored by the thermocouple reaches the required temperature;
if the vibration module is selected, setting the strength of a vibration exciter (8) according to the aging requirement, monitoring the vibration acceleration by using a vibration sensor and an acceleration monitoring device, and adjusting the strength of the vibration exciter according to the detected vibration acceleration;
if the pressurizing module is selected, the frequency and the voltage of a power supply are selected according to the aging requirement, the voltages applied to different samples are set through a voltage divider, the voltage is obtained through a voltage sensor, and the voltage is monitored through a voltage monitor;
step 3.2: and (3) closing the module required by the aging test selected in the step (3.1), reducing the temperature of the insulating oil to room temperature, and simultaneously opening the test module to monitor the state of the sample to obtain a partial discharge signal, the dielectric loss of the sample and the capacitance.
Compared with the prior art, the invention has the following technical characteristics:
(1) the test device is flexible and changeable. The three factors can be applied independently or in any combination, and single factor, double factor and three factor aging tests are carried out. Meanwhile, the device is simple to operate, convenient and flexible to use, can meet the requirements of various single-factor or multi-factor aging test schemes, and can accurately research the aging law of the GIS solid insulating material.
(2) The three-factor part of the invention comprises a temperature control module, and the vibration module and the pressurization module can independently operate or simultaneously operate in any combination. The sample support can place multiunit sample simultaneously, and the sample can be the same material in order to increase the sample volume, also can be different materials in order to carry out horizontal contrast. The voltage divider can be used for setting different groups of samples to apply the same voltage, and can also be used for applying different voltages to different groups of samples according to engineering requirements.
(3) The test module is used for periodically detecting the local discharge and the dielectric loss of the material so as to evaluate the aging state of the material, and can set any interval time to test the state parameters of the sample.
Drawings
FIG. 1 is a schematic structural diagram of a GIS solid insulation multi-sample three-factor aging test device system;
FIG. 2 is a structure diagram of a GIS solid insulation multi-sample three-factor aging test device;
FIG. 3 is a GIS solid insulation multi-sample three-factor aging test device test box and an internal structure diagram thereof;
FIG. 4 is a front view of a sample structure of a GIS solid insulation multi-sample three-factor aging test device;
FIG. 5 is a left side view of a sample structure of a GIS solid insulation multi-sample three-factor aging test device;
FIG. 6 is a top view of a sample structure of a GIS solid insulation multi-sample three-factor aging test device.
The reference numbers in the figures represent: 1-a test box, 2-a sample support, 3-a temperature control module, 4-a vibration module, 5-a pressurizing module, 6-a test module, 7-a heater and thermocouple installation interface, 8-a vibration exciter, 9-an electrode support, 10-a base and 11-an electrode.
Detailed Description
For the purpose of facilitating an understanding of the objects, advantages and solutions of the present invention, further description will be made below with reference to the accompanying drawings. The specific embodiments described herein are illustrative of the invention and are not to be construed as limiting the invention. In the description of the present invention, the descriptions of the upper, lower, left, right, front, rear, and other orientations and the top and bottom are defined with respect to fig. 2, and when the placement manner of the test device is changed, the corresponding orientations and the descriptions of the top and bottom will also be changed according to the change of the placement manner, and the description of the present invention is omitted here.
Example 1
In this embodiment, a GIS solid insulation multi-sample three-factor aging test device is disclosed, including: test box 1 and sample support 2, sample support 2 sets up in test box 1, test box 1 is used for providing the experimental environment, sample support 2 is used for loading the sample, still includes: the temperature control module 3, the vibration module 4, the pressurization module 5 and the test module 6;
the temperature control module 3 is used for heating a sample and monitoring the temperature;
the vibration module 4 is used for providing different vibration intensities and monitoring vibration;
the pressurizing module 5 is used for providing voltage and monitoring the voltage;
the test module 6 is used for monitoring the aging state of the sample.
Specifically, the test box 1 is filled with insulating oil, and an oil outlet is formed in the test box 1;
specifically, the number of the sample supports 3 is one or more, each group of sample supports 3 comprises an electrode support 9 and a base 10, the electrode support 9 is mounted on the base 10, and a plurality of electrodes 11 are arranged on the electrode support 9;
the temperature control module 3 comprises a heater, a thermocouple and a temperature controller, the heater and the thermocouple are arranged in the test box 1, and the temperature controller is arranged outside the test box 1 and is connected with the heater and the thermocouple through a heater and thermocouple mounting interface 7; the heater is a heating pipe and is arranged below the sample, and the thermocouple is arranged on the metal plate base 10 below the sample and is close to the side of the sample, but is not in contact with the metal plate base 10 and is separated by a nylon block.
The vibration module 4 comprises a vibration exciter 8, a vibration sensor and a vibration acceleration monitoring device, wherein the vibration exciter 8 is arranged below the test box 1, and the vibration sensor is arranged at the bottom of the test box 1 and is connected with the vibration acceleration monitoring device through a lead;
the pressurizing module 5 is arranged outside the test box 1 and comprises a power supply, a voltage divider, a voltage sensor and a voltage monitor which are connected with each other, and the voltage divider and the voltage sensor are respectively connected with the electrodes 11 through leads; the power supply and voltage divider provide the same or different magnitudes of voltage for different sets of samples. The voltage sensor and the voltage monitor are used for monitoring voltage changes at two ends of the sample, breaking down the breakdown moment of the sample and disconnecting the high-frequency power supply at the breakdown moment. In this embodiment, the voltage monitor is software that records the voltage and the breakdown time.
The test module 6 comprises a partial discharge test system and a dielectric loss and capacitance test system, and the two test systems are connected with the electrode 11 through a lead.
Specifically, 12 electrodes 11 are arranged on the electrode support 9. The voltages of the 12 electrode tips in each group are the same, the voltages applied to the groups can be set to be the same, and the voltage division setting can also be carried out according to the engineering requirements.
The embodiment also discloses a GIS solid insulation multi-sample three-factor aging test method, which is implemented according to the following steps when any GIS solid insulation multi-sample three-factor aging test device is used for testing:
step 1: mounting a sample to be aged on the sample support 2, so that the sample and the electrode 11 are both immersed in insulating oil and no bubbles exist on the surfaces of the electrode and the sample 11;
step 2: selecting any one module, any two modules or all of the temperature control module 3, the vibration module 4 and the pressurization module 5 as modules required by an aging test;
and step 3: setting a plurality of execution cycles, carrying out an aging test according to the steps from 3.1 to 3.2 in each execution cycle, and stopping the aging test when the voltage monitor detects the breakdown voltage if the selected module comprises a pressurizing module 5; if the selected module does not contain the pressurizing module 5, stopping the aging test after all execution cycles are finished;
step 3.1: performing an aging test according to the selected module required by the aging test, wherein if the temperature control module 3 is selected, the required temperature is obtained according to the aging requirement, the heating pipe is opened through the temperature controller to heat the insulating oil until the temperature of the insulating oil monitored by the thermocouple reaches the required temperature;
if the vibration module 4 is selected, setting the strength of the vibration exciter 8 according to the aging requirement, monitoring the vibration acceleration by using a vibration sensor and an acceleration monitoring device, and adjusting the strength of the vibration exciter 8 according to the detected vibration acceleration;
if the pressurizing module 5 is selected, the frequency and the voltage of the power supply are selected according to the aging requirement, the voltages applied to different samples are set through a voltage divider, the voltage is obtained through a voltage sensor, and the voltage is monitored through a voltage monitor;
step 3.2: and (3) closing the module required by the aging test selected in the step (3.1), reducing the temperature of the insulating oil to room temperature, and simultaneously opening the test module to monitor the state of the sample to obtain a partial discharge signal, the dielectric loss of the sample and the capacitance. The aging state of the sample can be calculated by the partial discharge signal, the dielectric loss of the sample and the capacitance.
Specifically, the execution period is flexibly set as required, and is generally from several hours to several days.
Specifically, by adopting the GIS solid insulation multi-sample three-factor aging test device, single-sample or multi-sample tests can be carried out according to the use method. The electric aging test, the thermal aging test, the vibration aging test, the electric heating double-factor aging test, the electric vibration double-factor aging test, the thermal vibration double-factor aging test and the electric heating vibration three-factor aging test can be carried out according to requirements.
In particular, the method is applicable to materials including GIS solid insulation general insulating materials and other insulating materials with potential application to GIS solid insulation.
Example 2
In this embodiment, a three-factor aging test device for multiple samples of a GIS solid insulation is provided, and referring to fig. 1, the test device can perform a multiple-sample, single-factor or multiple-factor accelerated aging test on a GIS solid insulation material. The three aging factors, namely electric field, heat and mechanical vibration parameters can be freely adjusted and combined according to aging requirements. On the basis of embodiment 1, the following technical characteristics are also disclosed:
as shown in figures 2 and 3, the fixing base is of a metal structure, the test box is placed above the fixing base, the vibration module is installed on the lower portion of the test box, and the spring is installed on the fixing base support to ensure that the base is kept stable when the test box vibrates. Three groups of sample supports are placed in the test box, and each group comprises 12 electrode tips. And a heating pipe and a thermocouple of the temperature control module are fixed at the bottom of the sample support.
As shown in fig. 4, 5, and 6, the sample used in this example has a structure in which hemispherical concave holes are uniformly distributed in a rectangular flat plate. The size of the rectangular flat plate is 150mm 120mm 5.5mm, and the distance between the centers of the concave holes is 30 mm. The shrinkage pool is the position of placing the electrode tip, and the material thickness of test point is 0.5 mm. Before testing, a layer of silver colloid is coated at the bottom of the concave hole to enhance the contact between the silver colloid and the electrode tip.
The heating range of the temperature module used in the embodiment is 20-150 ℃, the temperature of the insulating oil in the test box is monitored through the temperature controller, the switch of the heater is controlled, and the temperature of the insulating oil is ensured to be stabilized at the aging temperature.
The acceleration range applied by the vibration module used in the embodiment is 0-5m/s2。
The voltage range of the pressurizing module used in the present embodiment is 0-28kV, and the frequency range is 0-2000 Hz.
The method for realizing the accelerated aging of the GIS solid insulating material comprises the following steps: before aging, the sample to be aged is arranged on the sample bracket, so that the sample and the electrode are immersed in the insulating oil, and no bubbles exist on the surfaces of the electrode tip and the sample. When the aging test is carried out, if the pressurizing module is started, the frequency and the voltage of the high-frequency power supply are selected according to the aging requirement, and the voltage divider is adjusted to set the voltages applied to different samples according to the requirement. The voltage change across the sample was monitored using a voltage sensor and software to record the voltage and breakdown time. If the temperature control module is started, setting the required temperature by using the temperature controller according to the aging requirement, and starting an aging test when the temperature controller displays that the temperature of the insulating oil reaches the required temperature; if the vibration module is started, the strength of the vibration exciter is set according to the aging requirement, and the vibration acceleration is monitored by using the vibration sensor and the acceleration monitoring device. When the aging test is carried out, the test module is required to be used for monitoring the state of the sample periodically. And when the test is carried out, if the pressurizing module, the temperature control module or the vibration module is in an opening state, the pressurizing module, the temperature control module or the vibration module is closed, and if the temperature of the insulating oil is higher than the room temperature, the insulating oil is cooled to the room temperature. And then, carrying out partial discharge test on the test by using a partial discharge test system, testing the dielectric loss and the capacitance of the sample by using a dielectric loss and capacitance measurement system, and then closing the test module to continue the aging test. The test interval time can be flexibly set as required, if the sample is punctured in the aging test process, the aging test is stopped for testing, then the sample is replaced, and the aging test is continued.
By adopting the GIS solid insulation multi-sample three-factor aging test device, single-sample or multi-sample tests can be carried out according to the use method. The electric aging test, the thermal aging test, the vibration aging test, the electric heating double-factor aging test, the electric vibration double-factor aging test, the thermal vibration double-factor aging test and the electric heating vibration three-factor aging test can be carried out according to requirements.
Claims (4)
1. The utility model provides a three factor aging test devices of many samples of GIS solid insulation, includes: test box (1) and sample support (2), sample support (2) set up in test box (1), test box (1) is used for providing experimental environment, sample support (2) are used for loading the sample, its characterized in that still includes: the device comprises a temperature control module (3), a vibration module (4), a pressurization module (5) and a test module (6);
the temperature control module (3) is used for heating a sample and monitoring the temperature;
the vibration module (4) is used for providing different vibration intensities and monitoring vibration;
the pressurizing module (5) is used for providing voltage and monitoring the voltage;
the test module (6) is used for monitoring the aging state of the sample.
2. The GIS solid insulation multi-sample three-factor aging test device according to claim 1, wherein the test box (1) is filled with insulation oil, and the test box (1) is provided with an oil outlet;
the number of the sample supports (3) is one or more, each group of sample supports (3) comprises an electrode support (9) and a base (10), the electrode supports (9) are arranged on the bases (10), and a plurality of electrodes (11) are arranged on the electrode supports (9);
the temperature control module (3) comprises a heater, a thermocouple and a temperature controller, the heater and the thermocouple are arranged in the test box (1), and the temperature controller is arranged outside the test box (1) and is connected with the heater and the thermocouple through leads;
the vibration module (4) comprises a vibration exciter (8), a vibration sensor and a vibration acceleration monitoring device, wherein the vibration exciter (8) is arranged below the test box (1), and the vibration sensor is arranged at the bottom of the test box (1) and is connected with the vibration acceleration monitoring device through a lead;
the pressurizing module (5) is arranged outside the test box (1) and comprises a power supply, a voltage divider, a voltage sensor and a voltage monitor which are connected with each other, and the voltage divider and the voltage sensor are respectively connected with the electrode (11) through leads;
the test module (6) comprises a partial discharge test system and a dielectric loss and capacitance test system, and the two test systems are connected with the electrode (11) through a lead.
3. The GIS solid insulation multi-sample three-factor aging test device according to claim 2, characterized in that 12 electrodes (11) are arranged on the electrode holder (9).
4. A GIS solid insulation multi-sample three-factor aging test method is characterized in that when the GIS solid insulation multi-sample three-factor aging test device of any one of claims 2 or 3 is used for testing, the method is executed according to the following steps:
step 1: mounting a sample to be aged on a sample support (2) so that the sample and the electrode (11) are immersed in insulating oil and no air bubbles exist on the surfaces of the electrode and the sample (11);
step 2: selecting any one module, any two modules or all of the temperature control module (3), the vibration module (4) and the pressurization module (5) as modules required by the aging test;
and step 3: setting a plurality of execution cycles, carrying out the aging test according to the steps from 3.1 to 3.2 in each execution cycle, and stopping the aging test when the voltage monitor detects the breakdown voltage if the selected module comprises a pressurizing module (5); if the selected module does not contain the pressurizing module (5), stopping the aging test after all execution cycles are finished;
step 3.1: carrying out an aging test according to the selected module required by the aging test, wherein if the temperature control module (3) is selected, the required temperature is obtained according to the aging requirement, the heating pipe is opened through the temperature controller to heat the insulating oil until the temperature of the insulating oil monitored by the thermocouple reaches the required temperature;
if the vibration module (4) is selected, the strength of the vibration exciter (8) is set according to the aging requirement, the vibration acceleration is monitored by using a vibration sensor and an acceleration monitoring device, and the strength of the vibration exciter (8) is adjusted according to the detected vibration acceleration;
if the pressurizing module (5) is selected, the frequency and the voltage of the power supply are selected according to the aging requirement, the voltages applied to different samples are set through a voltage divider, the voltage is obtained through a voltage sensor, and the voltage is monitored through a voltage monitor;
step 3.2: and (3) closing the module required by the aging test selected in the step (3.1), reducing the temperature of the insulating oil to room temperature, and simultaneously opening the test module to monitor the state of the sample to obtain a partial discharge signal, the dielectric loss of the sample and the capacitance.
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| CN114199671A (en) * | 2021-12-17 | 2022-03-18 | 华北电力大学（保定） | Mechanical-thermal synergistic accelerated aging test platform |
| WO2022111157A1 (en) * | 2020-11-27 | 2022-06-02 | 深圳供电局有限公司 | Electrical aging test system for insulating material |
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