Test control system, test control method, and test control device

Abstract

The embodiment of the invention provides a test control system, a test control method and a test control device. The test control system comprises a test box body which is used for simulating an outdoor environment where a silica gel sheath applied to a high-voltage AC cable is located; the test controller is arranged outside the test box body; the sprayer is arranged in the test box body, is electrically connected with the test controller and is used for spraying test liquid to the silica gel sheath placed in the test box body under the control of the test controller; and a detection assembly electrically connected with the test controller and used for applying a test voltage to the silica gel sheath sprayed with the test liquid, detecting a leakage current of the silica gel sheath under the test voltage, and outputting a test voltage value and a leakage current value to the test controller so as to determine a resistance value determined according to the leakage current value and the test voltage value, and determining the hydrophobic migration performance index of the silica gel sheath. Therefore, the accuracy of the hydrophobic migration performance test result is improved.

Description

Technical Field

[0001] The present application relates to the field of electrical control technology, and in particular to a test control system, a test control method and a test control device. Background Art

[0002] Insulators are important insulating components in power systems. They are mainly used to support transmission and distribution lines and transmit electricity to user terminals. Silicone sheaths are key components of insulation design. They need to ensure a safe distance between conductors to prevent current from returning to the ground to protect transmission lines. When insulators are exposed to a severely polluted environment for a long time, the hydrophobic migration performance of their silicone sheaths will be affected to a certain extent. If the insulators are contaminated, a layer of water droplets or water mist will form on the surface of the silicone sheath due to rain or condensation. This will cause leakage current on the surface of the silicone sheath, posing a potential threat to the safe operation of the transmission line. Therefore, it is particularly important to test the hydrophobic migration performance of silicone sheaths.

[0003] In the related art, the hydrophobicity test control method used is the contact angle measurement method, which uses a syringe to add and remove water from a sample composed of a silicone sheath of an insulator, and measures the advancing contact angle and receding contact angle of the droplet on the sample surface to evaluate the hydrophobic migration performance of the insulator. However, this method requires manual operation of the water droplet using a syringe, and the advancing contact angle and receding contact angle of the water droplet are measured using a corresponding measuring tool. There are reasons such as operating errors or measurement tool errors, which lead to poor accuracy of the hydrophobic migration performance test results. Summary of the invention

[0004] In view of this, the embodiments of the present application provide a test control system, a test control method and a test control device to solve or alleviate the problem of poor accuracy of hydrophobic migration performance test results in the related art.

[0005] According to a first aspect of an embodiment of the present application, a test control system is provided for performing a hydrophobic migration performance test on a silicone sheath of an insulating support of a high-voltage AC cable. The test control system comprises: a test box (10) for simulating an outdoor environment where the silicone sheath applied to the high-voltage AC cable is located; a test controller (20) disposed outside the test box (10); and a sprayer (110) disposed inside the test box (10). The sprayer (110) is electrically connected to the test controller (20) and is used to spray the test box (10) with water under the control of the test controller (20). The silicone sheath disposed in the test box (10) sprays a test liquid; a detection component (30) is electrically connected to a test controller (20) and is used to apply a test voltage to the silicone sheath spraying the test liquid, detect a leakage current of the silicone sheath under the test voltage, and output the test voltage value and the leakage current value to the test controller (20), so that a resistance value determined according to the leakage current value and the test voltage value is determined as a hydrophobic migration performance index of the silicone sheath, wherein the resistance value is proportional to the hydrophobic migration performance indicated by the hydrophobic migration performance index.

[0006] In some embodiments of the present application, the sprayer (110) is specifically used to: receive preset test conditions sent by the test controller (20), and determine spraying quantity parameters based on the received preset test conditions, wherein the spraying quantity parameters at least include spraying duration, spraying angle, spraying mode and sprayed liquid content; under the control of the test controller (20), spray the test liquid on the silicone sheath based on the spraying quantity parameters to simulate the liquid content in the outdoor environment where the silicone sheath is located.

[0007] In some embodiments of the present application, the detection component (30) includes a voltage regulator, which is used to: obtain a test voltage parameter determined based on preset test conditions; based on the test voltage parameter, apply a test voltage to both ends of the silicone sheath spraying the test liquid, and output the test voltage value to the test controller (20).

[0008] In some embodiments of the present application, the detection component (104) further includes a current detector (310), wherein the detection end of the current detector (310) is electrically connected to the two ends of the silicone sheath to form a detection circuit, and the current detector (310) is used to: when the silicone sheath spraying the test liquid is under the test voltage, detect the leakage current value of the detection circuit where the silicone sheath is located, and output the leakage current value to the test controller (20).

[0009] In some embodiments of the present application, the test box (10) includes a temperature controller, which is used to: receive preset test conditions sent by the test controller (20), and determine test temperature parameters based on the received preset test conditions, the test temperature parameters at least including a test temperature value and a test temperature duration; control the temperature inside the test box (10) where the silicone sheath is located according to the test temperature parameters to simulate the outdoor ambient temperature where the silicone sheath is located.

[0010] In some embodiments of the present application, the test box (10) includes a humidity controller, which is used to: receive preset test conditions sent by the test controller (20), and determine test humidity parameters based on the received preset test conditions, the test humidity parameters at least including a test humidity value and a test humidity duration; and control the humidity in the test box (10) where the silicone sheath is located according to the test humidity parameters to simulate the humidity of the outdoor environment where the silicone sheath is located.

[0011] In some embodiments of the present application, the test control system also includes a data processing device that is communicatively connected to the test controller (20), and the data processing device is used to: receive the leakage current value and the test voltage value sent by the test controller (20); calculate the resistance value between the two ends of the silicone sheath based on the leakage current value and the test voltage value; and determine whether to send a test warning instruction to the test controller (20) based on the resistance value and the preset resistance value.

[0012] In some embodiments of the present application, the data processing device is specifically used to: determine whether the resistance value is less than or equal to a preset resistance value; if the resistance value is less than or equal to the preset resistance value, send a test warning instruction and the resistance value to the test controller (20) to issue an early warning for the silicone sheath.

[0013] According to a second aspect of an embodiment of the present application, a test control method is provided for performing a hydrophobic migration performance test on a silicone sheath of an insulating support of a high-voltage AC cable, comprising: controlling the temperature and humidity conditions in a test box where the silicone sheath is located; controlling a sprayer to spray a test liquid on the silicone sheath; when controlling a voltage regulator to apply a test voltage to the silicone sheath, detecting the leakage current of the silicone sheath sprayed with the test liquid under the test voltage by a current detector, and outputting the test voltage value and the leakage current value to a test controller, so that a resistance value determined according to the leakage current value and the test voltage value is determined as a hydrophobic migration performance index of the silicone sheath, wherein the resistance value is proportional to the hydrophobic migration performance indicated by the hydrophobic migration performance index.

[0014] According to a third aspect of an embodiment of the present application, a test control device is provided for performing a hydrophobic migration performance test on a silicone sheath of an insulating support of a high-voltage AC cable, the device comprising: a control module for controlling the temperature and humidity conditions in a test box where the silicone sheath is located, and controlling a sprayer to spray a test liquid on the silicone sheath; a detection module for detecting, when a voltage regulator applies a test voltage to the silicone sheath, a leakage current of the silicone sheath sprayed with the test liquid under the test voltage through a current detector, and outputting the test voltage value and the leakage current value to a test controller, so as to determine a resistance value determined according to the leakage current value and the test voltage value as a hydrophobic migration performance index of the silicone sheath, wherein the resistance value is proportional to the hydrophobic migration performance indicated by the hydrophobic migration performance index.

[0015] According to the hydrophobic migration performance test control system, test control method and test control device provided in the embodiments of the present application, the test liquid is sprayed on the silicone sheath to detect the leakage current flowing through the silicone sheath under the applied test voltage, so that the hydrophobic migration performance of the silicone sheath is determined according to the change of the leakage current, thereby improving the accuracy of the hydrophobic migration performance test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the embodiments of the present application. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0017] Figure 1 is a structural block diagram of a test control system according to an embodiment of the present application;

[0018] Figure 2 A schematic diagram of the detection principle of leakage current detection according to an embodiment of the present application;

[0019] Figure 3 A flow chart of a test control method according to an embodiment of the present application;

[0020] Figure 4 The figure is a structural block diagram of a test control device according to an embodiment of the present application.

[0021] The reference numerals are as follows:

[0022] Test box: 10, test controller: 20, sprayer: 110, detection component: 30, current detector: 310;

[0023] S31: controlling the temperature and humidity conditions in the test box where the silicone sheath is located, S32: controlling the sprayer to spray the test liquid on the silicone sheath, S33: when the voltage regulator applies the test voltage to the silicone sheath, detecting the leakage current of the silicone sheath sprayed with the test liquid under the test voltage through the current detector, and outputting the test voltage value and the leakage current value to the test controller, so as to determine the resistance value determined by the leakage current value and the test voltage value as the hydrophobic migration performance index of the silicone sheath, wherein the resistance value is proportional to the hydrophobic migration performance indicated by the hydrophobic migration performance index;

[0024] Test control device: 40 , control module: 410 , detection module: 420 . DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solutions in the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the embodiments of the present application should fall within the scope of protection of the embodiments of the present application.

[0026] The specific implementation of the embodiments of the present application is further explained below in combination with the embodiments of the present application and the accompanying drawings.

[0027] Figure 1 The following is a structural block diagram of a test control system according to an embodiment of the present application. The test control system is used to perform a hydrophobic migration performance test on a silicone sheath of an insulating support of a high-voltage AC cable.

[0028] like Figure 1 As shown, the test control system includes: a test box 10 , a test controller 20 , a sprayer 110 and a detection component 30 .

[0029] The test box 10 is used to simulate the outdoor environment of the silicone sheath used for high-voltage AC cables; the test controller 20 is arranged outside the test box 10; the sprayer 110 is arranged in the test box 10, and the sprayer 110 is electrically connected to the test controller 20, and is used to spray the test liquid on the silicone sheath placed in the test box (10) under the control of the test controller 20; the detection component 30 is electrically connected to the test controller 20, and is used to apply a test voltage to the silicone sheath sprayed with the test liquid, detect the leakage current of the silicone sheath under the test voltage, and output the test voltage value and the leakage current value to the test controller 20, so as to determine the resistance value of the silicone sheath determined according to the leakage current value and the test voltage value as the hydrophobic migration performance index of the silicone sheath, wherein the resistance value is proportional to the hydrophobic migration performance indicated by the hydrophobic migration performance index.

[0030] Silicone sheath refers to the insulator umbrella cover (including silicone rubber insulating umbrella skirt and silicone rubber insulating sleeve), which can provide the necessary creepage distance (to prevent dust and other dirt from spraying on the surface of the insulator, forming a path to be broken down by the voltage at both ends of the insulator, i.e. creepage) and protect the internal core rod from the influence of climate. The silicone sheath is usually made of hydrophobic transfer material, which can transfer the hydrophobic property from the whole to the clean surface or contaminated surface of the silicone sheath. Therefore, the hydrophobic migration performance of the silicone sheath indicates the ability to transfer the hydrophobic property from the whole to the clean surface or contaminated surface of the silicone sheath, among which hydrophobicity is also called hydrophobicity, which refers to the physical property of the silicone sheath and water repelling each other.

[0031] The sprayer 110 can be set as a humidifier, and the test controller 20 refers to a PLC (Programmable Logic Controller) device, which can control the spray volume of the sprayer 110 to spray the test liquid on the silicone sheath through the sprayer 110 to obtain a treated silicone sheath, wherein the test liquid is distilled water without impurities, which is used to detect the hydrophobicity of the silicone sheath.

[0032] In some embodiments, the sprayer 110 is used to: receive preset test conditions sent by the test controller 20, and determine spraying quantity parameters based on the preset test conditions, wherein the spraying quantity parameters include at least spraying duration, spraying angle, spraying method and sprayed liquid content; under the control of the test controller 20, spray the test liquid on the silicone sheath based on the spraying quantity parameters to simulate the liquid content in the outdoor environment where the silicone sheath is located.

[0033] Specifically, the preset test conditions are test conditions formulated according to actual needs. Different spraying parameters (such as spraying duration, spraying angle, spraying method and sprayed liquid content) can be set for the same silicone sheath to obtain multiple groups of test results to ensure the accuracy of the test. Before the PLC device controls the sprayer 110 to spray the test liquid, the contaminated liquid (liquid whose main component is dust) is prepared to pollute the silicone sheath to simulate the natural environment where the silicone sheath is located. Further, the PLC device controls the sprayer 110 to spray the test liquid corresponding to the spraying volume parameter on multiple groups of silicone sheaths, which can simulate the change in the hydrophobic migration performance of the silicone sheath after the liquid is sprayed on the surface in the actual use scenario.

[0034] In some embodiments, the detection component 30 includes a voltage regulator, which is used to:

[0035] A test voltage parameter determined based on a preset test condition is obtained, wherein the preset test condition at least includes the test voltage parameter; based on the test voltage parameter, a test voltage is applied to both ends of the silicone sheath spraying the test liquid, and the test voltage value is output to a test controller (20).

[0036] In some embodiments, the detection component (30) further includes a current detector (310), wherein a detection end of the current detector (310) is electrically connected to two ends of the silicone sheath to form a detection circuit, and the current detector (310) is used to: when the silicone sheath spraying the test liquid is under the test voltage, detect the leakage current value of the detection circuit where the silicone sheath is located, and output the leakage current value to the test controller (20).

[0037] A voltage regulator refers to a power supply circuit or power supply device that can adjust the output voltage. The input range of the voltage regulator can be arbitrarily slid from 30V to 100V. The user can adjust the parameters of the voltage regulator according to the test voltage parameters every other week, so that the voltage regulator adjusts the test voltage applied to the silicone sheath to detect the leakage current of the silicone sheath under the test voltage. Different test voltage parameters can be set for the same silicone sheath to obtain multiple groups of test results to ensure the accuracy of the test.

[0038] Figure 2 FIG. 1 is a schematic diagram of a detection principle for detecting leakage current according to an embodiment of the present application. Figure 2 As shown, the current detector (310) refers to a device such as a multimeter or an ammeter for detecting loop current. The detection end of the current detector (310) is electrically connected to the two ends of the silicone sheath through a metal wire (such as a copper wire) to form a detection loop. The leakage current of the silicone sheath refers to the current flowing through the silicone sheath in the test box after the surface is damp under the test voltage.

[0039] It is understandable that when the silicone sheath is contaminated, a layer of water droplets or water mist is easily formed on its surface due to the effect of rain or condensation, causing the electric field to be distorted, thereby inducing surface discharge and flashover, posing a potential threat to the safe operation of the transmission line. Therefore, in order to ensure the performance of the silicone sheath, it is necessary to detect the hydrophobic migration performance of the silicone sheath. Various hydrophobicity detection methods are often used to evaluate the hydrophobic migration performance, such as contact angle measurement method (evaluating the hydrophobic performance of the silicone sheath by measuring the contact angle of the droplet on the surface of the silicone sheath), drop test method (evaluating the hydrophobic performance of the silicone sheath by measuring the sliding and transparency of the droplet on the surface of the silicone sheath) or immersion depth measurement method (evaluating the hydrophobic performance of the silicone sheath by immersing the silicone sheath in liquid and measuring the depth of liquid infiltration into the silicone sheath). It can be seen that the above methods require manual use of corresponding measuring tools for test operations. In this way, there is a problem of large errors in the measurement results due to test operation errors or errors in measuring tools.

[0040] Based on this, the present application adjusts the test voltage applied to both ends of the silicone sheath spraying the test liquid through the voltage regulator in the detection component, and detects the leakage current flowing through the silicone sheath under the test voltage through the current detector in the detection component to determine the hydrophobic migration performance of the silicone sheath according to the change of the leakage current.

[0041] Specifically, when a DC voltage is applied to the silicone sheath, its leakage current does not decay. After the pressure is applied for a certain period of time, the reading of the multimeter or ammeter is equal to the leakage current. When the hydrophobic migration performance of the silicone sheath is good, the leakage current will decrease rapidly and the rate of change will increase; when the hydrophobic migration performance of the silicone sheath is poor, the leakage current will decrease slowly and the rate of change will be smaller.

[0042] Therefore, the present application can determine the hydrophobic migration performance of the silicone sheath by the change of the leakage current, such as sending the leakage current detected by the current detector to the test controller for display. The leakage current can be represented by a curve or a table. The tester can calculate the resistance value of the silicone sheath according to the leakage current data displayed by the test controller and the pre-set test voltage parameters. When the resistance value of the silicone sheath gradually increases, it means that the hydrophobic migration performance of the silicone sheath is good. Among them, when the leakage current of the silicone sheath is detected by the current detector, other auxiliary equipment can be used to help the current detector detect the current flowing through each group of silicone sheaths. The present application does not limit the auxiliary equipment here.

[0043] Among them, when the PLC equipment is equipped with MCGS (Monitor and Control Generated System, industrial control screen programming software) software, since MCGS software supports various communication protocols, it can be connected to a variety of PLCs, instruments and other equipment, and provides rich advanced functions such as graphics processing, data storage, alarm management, trend analysis, etc. Therefore, the software can be used to collect, process and record leakage current data, thereby forming a leakage current and time curve, and recording the leakage current changes of each group of silicone sheaths under the corresponding test conditions.

[0044] It should be noted that the test control system of the insulator of the present application is based on the IEC_62073 standard method for testing the silicone sheath, which is a method for using an environmental chamber (i.e., a test chamber) to determine the hydrophobic transfer performance of the silicone sheath.

[0045] In some embodiments, the test box 10 includes a temperature controller, which is used to: receive preset test conditions sent by the test controller, and determine test temperature parameters based on the received preset test conditions, where the test temperature parameters at least include a test temperature value and a test temperature duration; and control the temperature in the test box where the silicone sheath is located according to the test temperature parameters to simulate the outdoor ambient temperature where the silicone sheath is located.

[0046] Specifically, the temperature controller is electrically connected to the PLC device. In the actual use of the insulator, the temperature also has a certain influence on the insulation resistance of the silicone sheath. When the ambient temperature of the silicone sheath increases, the polarization of the insulating medium intensifies, and the number of charged particles forming the leakage current increases, thereby increasing the leakage current of the insulating medium and reducing the insulation resistance, making the hydrophobic migration performance of the silicone sheath poor. Therefore, the present application takes into account the influence of temperature on the silicone sheath, and in order to make the test environment of the silicone sheath closer to the actual use environment, the temperature of the environment in which the silicone sheath is located is adjusted by setting a temperature controller.

[0047] That is to say, the PLC device can determine the test temperature value and test temperature duration corresponding to the temperature controller according to the test temperature parameters in the preset test conditions (such as determining the test temperature to be a value of about 35°C-80°C, and the test temperature duration to be a value of about 0h-24h), and send it to the temperature controller, so that the temperature controller adjusts the temperature in the test box where the silicone sheath is located to the test temperature. In this way, the environmental variables in the test box where the silicone sheath is located can be flexibly adjusted to ensure the accuracy of the test results as much as possible.

[0048] In some embodiments, the test box 10 includes a humidity controller, which is used to: receive preset test conditions sent by the test controller, and determine test humidity parameters based on the received preset test conditions, the test humidity parameters at least including a test humidity value and a test humidity duration; control the humidity in the test box where the silicone sheath is located according to the test humidity parameters to simulate the outdoor environment humidity where the silicone sheath is located.

[0049] Specifically, the humidity controller can be set in a PLC device. In the actual use of the insulator, when the surface of the silicone sheath absorbs moisture and forms a water film, the insulation resistance of the silicone sheath will be significantly reduced. Therefore, humidity also has a certain influence on the insulation resistance of the silicone sheath. When the humidity of the environment in which the silicone sheath is located is higher, the surface area of ​​the water film formed on the surface of the silicone sheath is larger, and the number of charged particles forming the leakage current increases, thereby increasing the leakage current of the insulating medium and reducing the insulation resistance, making the hydrophobic migration performance of the silicone sheath poor. Therefore, the present application takes into account the influence of humidity on the silicone sheath, and in order to make the test environment in which the silicone sheath is located closer to the actual use environment, the humidity of the environment in which the silicone sheath is located is adjusted by setting a humidity controller.

[0050] That is to say, the PLC device can determine the test humidity value and test humidity duration corresponding to the humidity controller according to the preset test humidity (such as determining the test humidity to be a value of about 0-100%, and the test humidity duration to be a value of about 0h-24h), and send it to the humidity controller, so that the humidity controller adjusts the test humidity value in the test box where the silicone sheath is located to the test humidity. In this way, the environmental variables of the environment in which the silicone sheath is located can be flexibly adjusted to ensure the accuracy of the test results as much as possible.

[0051] In some embodiments, the test control system 100 further includes a data processing device in communication with the test controller 20, the data processing device being used to:

[0052] Receive the leakage current and test voltage sent by the test controller; calculate the resistance value of the silicone sheath based on the leakage current and the test voltage; and determine whether to send a test warning instruction to the test controller based on the resistance value and a preset resistance value.

[0053] Specifically, the data processing device is a device with data processing capabilities, such as a terminal device, a cloud device or other device, and the data processing device is communicatively connected to the test controller 20. The preset resistance value is the qualified insulation resistance value of various types of silicone sheaths. For example, the insulation resistance value of suspension insulators used for voltage levels of 330KV and below should not be less than 300MΩ; the insulation resistance value of suspension insulators used for voltage levels of 500kV should not be less than 500MΩ. Among them, when the resistance value of the silicone sheath is reduced to the set parameter, it is called a low-value insulator, and when it is reduced to zero, it is called a zero-value insulator (a zero-value insulator means that the silicone sheath has lost insulation, and the voltage distribution value on the sheet will be reduced or zero)

[0054] When the test controller 20 sends the recorded leakage current and test voltage to the terminal device, the terminal device will calculate the resistance value of the silicone sheath based on the ratio between the leakage current and the test voltage, and determine whether to send a test warning instruction to the test controller 20 based on the resistance value and the preset resistance value.

[0055] Furthermore, in some embodiments, the data processing device is specifically used to:

[0056] Determine whether the resistance value is less than or equal to the preset resistance value; if the resistance value is less than or equal to the preset resistance value, send a test warning instruction and the resistance value to the test controller to issue an early warning of the silicone sheath.

[0057] The test warning instruction can be displayed in the form of a pop-up window on the display interface of the test controller 20. The test warning instruction can be "The hydrophobic migration performance of the silicone sheath A is poor". The content of the instruction can also be adjusted according to actual needs, and this application does not limit it here.

[0058] That is to say, the data processing device determines whether the calculated resistance value is less than or equal to the preset resistance value. For example, the insulation resistance value of the suspension insulator used for voltage levels of 330KV and below should not be less than 300MΩ. Then, when the resistance value is less than 300MΩ, it is determined that the resistance value of the silicone sheath is low and its hydrophobic migration performance is poor. Therefore, the data processing device sends a test warning instruction and resistance value to the test controller 20 to issue a warning for the silicone sheath. In this way, the user can be reminded of the change in the hydrophobic migration performance of the silicone sheath in a timely manner, so that the user can record the data of the silicone sheath in a timely manner.

[0059] Figure 3 The flowchart of the test control method according to one embodiment of the present application is shown in FIG. The test control method is used to test the hydrophobic migration performance of the silicone sheath of the insulating support of the high-voltage AC cable.

[0060] like Figure 3 As shown, the test control method includes:

[0061] S31: Control the temperature and humidity conditions in the test box where the silicone sheath is located.

[0062] Specifically, the test controller 20 (i.e., the PLC device) determines the test temperature corresponding to the temperature controller according to the test temperature parameters in the preset test conditions (such as determining the test temperature to be a value of about 35°C-80°C), and determines the test humidity corresponding to the humidity controller according to the preset test humidity (such as determining the test humidity to be a value of about 0-100%), and sends the test temperature to the temperature controller, and sends the test humidity to the humidity controller, so that the temperature controller and the humidity controller adjust the temperature and humidity in the test box 10 where the silicone sheath is located to the test temperature and test humidity.

[0063] S32: Control the sprayer to spray the test liquid onto the silicone sheath.

[0064] Specifically, the sprayer 110 is controlled by the PLC device to spray the test liquid with corresponding spraying volume parameters on the silicone sheath, which can simulate the change of the hydrophobic migration performance of the silicone sheath after the liquid is sprayed on the surface in the actual use scenario.

[0065] S33: When the voltage regulator applies a test voltage to the silicone sheath, the leakage current of the silicone sheath sprayed with the test liquid under the test voltage is detected by the current detector, and the test voltage value and the leakage current value are output to the test controller, so that the resistance value determined according to the leakage current value and the test voltage value is determined as the hydrophobic migration performance index of the silicone sheath, wherein the resistance value is proportional to the hydrophobic migration performance indicated by the hydrophobic migration performance index.

[0066] That is to say, the present application adjusts the test voltage applied to the two ends of the silicone sheath spraying the test liquid through the voltage regulator in the detection component 30, and detects the leakage current flowing through the silicone sheath under the test voltage through the current detector (310) in the detection component 30, and outputs the detection value of the leakage current to the test controller, so that the resistance value determined by the leakage current and the test voltage is determined as the hydrophobic migration performance index of the silicone sheath, so as to determine the hydrophobic migration performance of the silicone sheath according to the change of the leakage current.

[0067] According to the test control method of the embodiment of the present application, the test liquid is sprayed on the silicone sheath to detect the leakage current flowing through the silicone sheath under the applied test voltage, so that the hydrophobic migration performance of the silicone sheath is determined according to the change of the leakage current, thereby improving the accuracy of the hydrophobic migration performance test results.

[0068] Figure 4This is a structural block diagram of a test control device according to an embodiment of the present application. The specific embodiment of the present application does not limit the specific implementation of the test control device.

[0069] like Figure 4 As shown, the test control device 40 is used to perform a hydrophobic migration performance test on the silicone sheath of the insulating support of the high-voltage AC cable, including: a control module 410, used to control the temperature and humidity conditions in the test box where the silicone sheath is located, and control the sprayer to spray the test liquid on the silicone sheath; a detection module 420, used to detect the leakage current of the silicone sheath sprayed with the test liquid under the test voltage applied by the voltage regulator to the silicone sheath through a current detector, and output the test voltage value and the leakage current value to the test controller, so as to determine the resistance value determined according to the leakage current value and the test voltage value as the hydrophobic migration performance index of the silicone sheath, wherein the resistance value is proportional to the hydrophobic migration performance indicated by the hydrophobic migration performance index.

[0070] According to the test control device of the embodiment of the present application, the test liquid is sprayed on the silicone sheath to detect the leakage current flowing through the silicone sheath under the applied test voltage, so as to determine the hydrophobic migration performance of the silicone sheath according to the change of the leakage current, thereby improving the accuracy of the hydrophobic migration performance test results.

[0071] It should be pointed out that, according to the needs of implementation, the various components / steps described in the embodiments of the present application can be split into more components / steps, or two or more components / steps or partial operations of components / steps can be combined into new components / steps to achieve the purpose of the embodiments of the present application.

[0072] The above-mentioned method according to the embodiment of the present application can be implemented in hardware, firmware, or implemented as software or computer code that can be stored in a recording medium (such as a CD ROM, RAM, floppy disk, hard disk or magneto-optical disk), or implemented as a computer code originally stored in a remote recording medium or a non-temporary machine-readable medium downloaded through a network and to be stored in a local recording medium, so that the method described herein can be stored in such software processing on a recording medium using a general-purpose computer, a special-purpose processor or programmable or special-purpose hardware (such as an ASIC or FPGA). It can be understood that a computer, a processor, a microprocessor controller or programmable hardware includes a storage component (e.g., RAM, ROM, flash memory, etc.) that can store or receive software or computer code, and when the software or computer code is accessed and executed by a computer, a processor or hardware, the test control method described herein is implemented. In addition, when a general-purpose computer accesses the code for implementing the test control method shown here, the execution of the code converts the general-purpose computer into a special-purpose computer for executing the test control method shown here.

[0073] Those of ordinary skill in the art will appreciate that the units and method steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the embodiments of the present application.

[0074] The above implementation methods are only used to illustrate the embodiments of the present application, and are not intended to limit the embodiments of the present application. Ordinary technicians in the relevant technical field can make various changes and modifications without departing from the spirit and scope of the embodiments of the present application. Therefore, all equivalent technical solutions also belong to the scope of the embodiments of the present application, and the scope of patent protection of the embodiments of the present application should be defined by the claims. The systems, devices or modules described in the above embodiments can be implemented by computer chips or entities, or by products with certain functions.

Claims

1. A test control system, characterized in that: Used to test the hydrophobic migration performance of the silicone sheath of the insulating support of the high-voltage AC cable, the test control system includes: A test box (10) is used to simulate an outdoor environment where a silicone sheath applied to a high-voltage AC cable is located; A test controller (20) is arranged outside the test box (10); a sprayer (110) disposed in the test box (10), the sprayer (110) being electrically connected to the test controller (20) and being used for spraying a test liquid onto the silicone sheath placed in the test box (10) under the control of the test controller (20); A detection component (30) is electrically connected to the test controller (20) and is used to apply a test voltage to the silicone sheath spraying the test liquid, detect the leakage current of the silicone sheath under the test voltage, and output the test voltage value and the leakage current value to the test controller (20), so as to determine the resistance value determined according to the leakage current value and the test voltage value as the hydrophobic migration performance index of the silicone sheath, wherein the resistance value is proportional to the hydrophobic migration performance indicated by the hydrophobic migration performance index.

2. The test control system according to claim 1, characterized in that: The sprayer (110) is used for: receiving a preset test condition sent by the test controller (20), and determining a spraying amount parameter based on the received preset test condition, wherein the spraying amount parameter at least includes a spraying duration, a spraying angle, a spraying mode, and a sprayed liquid content; Under the control of the test controller (20), the test liquid is sprayed on the silicone sheath based on the spraying amount parameter to simulate the liquid content in the outdoor environment where the silicone sheath is located.

3. The test control system according to claim 1, characterized in that: The detection component (30) comprises a voltage regulator, wherein the voltage regulator is used for: Obtaining test voltage parameters determined based on preset test conditions; Based on the test voltage parameter, the test voltage is applied to both ends of the silicone sheath spraying the test liquid, and the test voltage value is output to the test controller (20).

4. The test control system according to claim 1, characterized in that: The detection component (30) further comprises a current detector (310), wherein a detection end of the current detector (310) is electrically connected to two ends of the silicone sheath to form a detection loop, and the current detector (310) is used to: When the silicone sheath spraying the test liquid is under the test voltage, the leakage current of the detection circuit where the silicone sheath is located is detected, and the leakage current value is output to the test controller (20).

5. The test control system according to claim 1, characterized in that: The test box (10) comprises a temperature controller, wherein the temperature controller is used for: Receiving a preset test condition sent by the test controller (20), and determining a test temperature parameter based on the received preset test condition, wherein the test temperature parameter at least includes a test temperature value and a test temperature duration; The temperature in the test box (10) where the silicone sheath is located is controlled according to the test temperature parameter to simulate the outdoor environment temperature where the silicone sheath is located.

6. The test control system according to claim 1, characterized in that: The test box (10) comprises a humidity controller, which is used for: Receiving a preset test condition sent by the test controller (20), and determining a test humidity parameter based on the received preset test condition, the test humidity parameter comprising at least a test humidity value and a test humidity duration; The humidity in the test box (10) where the silicone sheath is located is controlled according to the test humidity parameter to simulate the humidity of the outdoor environment where the silicone sheath is located.

7. The test control system according to claim 1, characterized in that: The test control system further comprises a data processing device in communication connection with the test controller (20), wherein the data processing device is used for: receiving the leakage current value and the test voltage value sent by the test controller (20); Calculate the resistance value between the two ends of the silicone sheath based on the leakage current value and the test voltage value; Based on the resistance value and the preset resistance value, it is determined whether to send a test warning instruction to the test controller (20).

8. The test control system according to claim 6, characterized in that: The data processing device is used for: Determining whether the resistance value is less than or equal to the preset resistance value; If the resistance value is less than or equal to the preset resistance value, the test warning instruction and the resistance value are sent to the test controller (20) to issue a warning for the silicone sheath.

9. A test control method, characterized in that: Used to test the hydrophobic migration performance of the silicone sheath of the insulating support of high-voltage AC cables, including: Control the temperature and humidity conditions in the test chamber where the silicone sheath is located; Controlling the sprayer to spray the test liquid onto the silicone sheath; When the voltage regulator applies a test voltage to the silicone sheath, the leakage current of the silicone sheath spraying the test liquid under the test voltage is detected by a current detector, and the test voltage value and the leakage current value are output to a test controller, so that the resistance value determined according to the leakage current value and the test voltage value is determined as the hydrophobic migration performance index of the silicone sheath, wherein the resistance value is proportional to the hydrophobic migration performance indicated by the hydrophobic migration performance index.

10. A test control device, characterized in that: Used to test the hydrophobic migration performance of the silicone sheath of the insulating support of high-voltage AC cables, including: A control module, used to control the temperature and humidity conditions in the test box where the silicone sheath is located, and control the sprayer to spray the test liquid on the silicone sheath; A detection module is used to detect the leakage current of the silicone sheath spraying the test liquid under the test voltage through a current detector when the voltage regulator applies the test voltage to the silicone sheath, and output the test voltage value and the leakage current value to a test controller, so as to determine the resistance value determined according to the leakage current value and the test voltage value as the hydrophobic migration performance index of the silicone sheath, wherein the resistance value is proportional to the hydrophobic migration performance indicated by the hydrophobic migration performance index.

Images