WO2023174015A1 - Air gap withstand voltage measurement and calculation method and apparatus, and computer device and medium - Google Patents

Abstract

An air gap withstand voltage measurement and calculation method and apparatus, and a computer device and a medium. The method comprises: acquiring, by using an interaction module, the type and polarity of a test voltage applied in a high-voltage test; according to the type and polarity of the test voltage, determining a target conversion formula between a withstand voltage and an air gap distance; acquiring an actually measured gap distance of an air gap by using a distance measurement module; acquiring a test environment parameter in the high-voltage test by using an environment parameter detection module; and according to the actually measured gap distance, the test environment parameter and the target conversion formula, determining a withstand voltage corresponding to the current air gap.

Description

Air gap withstand voltage measurement methods, devices, computer equipment and media

This application claims priority to the Chinese patent application with the filing date of March 16, 2022 and the application number 202210255696.7. The entire content of this application is incorporated into this application by reference.

Technical field

This application relates to the technical field of electrical testing of power systems, for example, to an air gap withstand voltage measurement method, device, computer equipment and media.

Background technique

High-voltage testing is an important method for testing the performance of electrical equipment. When arranging the high-voltage test circuit, it is necessary to ensure that the air gap distance between the high-potential point in the test circuit and its surrounding low-potential points can withstand the applied test voltage without breakdown to ensure the smooth conduct of the high-voltage test. .

The breakdown voltage of the air gap is related to many factors such as air gap distance, electric field uniformity, voltage type, electrode polarity and atmospheric conditions. In order to accurately predict the discharge voltage of the air gap, discharge tests, simulation calculations and other relatively complex methods must be used. This method is not suitable for the layout of actual high-voltage test circuits.

In related technologies, testers mostly rely on estimating the gap distance before applying a test voltage, and then combine it with past test experience to determine whether the air gap distance between the high potential point and the low potential point in the test circuit can withstand the applied test. Voltage. Although this method is simple, it has the following problems: the pressure resistance judgment has high requirements on the technical level and work experience of the test personnel, the practicality is poor, the judgment error is large, and the intuitive and quantitative air gap resistance cannot be obtained. Depending on the voltage measurement results, in sites with small on-site space and insufficient redundancy, it is easy to cause discharge problems when voltage is applied due to errors in judgment of withstand voltage, affecting the safety and reliability of the system.

Contents of the invention

This application provides an air gap withstand voltage measurement method, device, computer equipment and medium, which can realize quantitative and intuitive calculation of the air gap withstand voltage, with a simple calculation method and high accuracy.

According to one aspect of this application, a method for calculating air gap withstand voltage is provided, including the following steps:

Use the interactive module to obtain the test voltage type and test voltage polarity applied in the high-voltage test;

Determine the target conversion formula between the withstand voltage and the air gap distance according to the test voltage type and the test voltage polarity, and the independent variables of the target conversion formula include the air gap distance and environmental parameters;

Use the ranging module to obtain the actual measured gap distance of the air gap;

Use the environmental parameter detection module to obtain the test environment parameters in the high-voltage test;

The withstand voltage corresponding to the current air gap is determined according to the measured gap distance, the test environment parameters and the target conversion formula.

According to another aspect of the present application, an air gap withstand voltage measurement device is provided for performing the above air gap withstand voltage measurement method. The device includes: an interactive module for obtaining the test voltage applied in the high-voltage test. type and test voltage polarity; a distance measurement module is used to obtain the actual measured gap distance of the air gap; an environmental parameter detection module is used to obtain the test environment parameters in the high-voltage test; a control module is used to obtain the test environment parameters according to the test voltage type and the The polarity of the test voltage determines the target conversion formula between the withstand voltage and the air gap distance. The independent variables of the target conversion formula include the air gap distance and environmental parameters; and based on the measured gap distance, the test environment parameters and The target conversion formula determines the withstand voltage corresponding to the current air gap.

According to another aspect of the present application, a computer device is provided, the computer device including: At least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores a computer program that can be executed by the at least one processor, and the computer program is executed by the at least one processor , so that the at least one processor can execute the above air gap withstand voltage measurement method.

According to another aspect of the present application, a computer-readable storage medium is provided. The computer-readable storage medium stores computer instructions. The computer instructions are used to implement the above air gap withstand voltage measurement method when executed by a processor. .

Description of the drawings

Figure 1 is a flow chart of an air gap withstand voltage measurement method provided in Embodiment 1 of the present application;

Figure 2 is a flow chart of another air gap withstand voltage measurement method provided in Embodiment 1 of the present application;

Figure 3 is a flow chart of yet another air gap withstand voltage measurement method provided in Embodiment 1 of the present application;

Figure 4 is a schematic structural diagram of an air gap withstand voltage measuring device provided in Embodiment 2 of the present application;

Figure 5 is a schematic structural diagram of another air gap withstand voltage measuring device provided in Embodiment 2 of the present application;

FIG. 6 is a schematic structural diagram of a computer device provided in Embodiment 3 of the present application.

Detailed ways

The terms "first" and "second" in the description and claims of this application and the above drawings etc. are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances so that the embodiments of the application described herein can be practiced in sequences other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, e.g., a process, method, system, product, or apparatus that encompasses a series of steps or units and need not be limited to those explicitly listed. Those steps or elements may instead include other steps or elements not expressly listed or inherent to the process, method, product or apparatus.

After research, the withstand voltage of the air gap is not only related to the air gap distance, but also affected by many factors such as electric field uniformity (electrode shape), voltage type, voltage polarity, atmospheric conditions, etc. According to the difference in uniformity of the electric field, it can be divided into uniform electric field, slightly uneven electric field and extremely uneven electric field. The uniformity of the electric field is mainly affected by the shape of the electrode. Usually in the high-voltage test circuit, extremely uneven electric fields such as rod-plate electrodes can be used. Consider the electric field. Rod-plate electrodes have a significant polarity effect, so their withstand voltage is affected by the voltage polarity.

Based on the above theory, this application considers the above factors that affect the withstand voltage together, and proposes an air gap withstand voltage measurement method, device, computer equipment and medium to achieve quantitative and intuitive calculation of the air gap withstand voltage. The calculation method is simple and has high accuracy.

Below, specific embodiments of the present application will be described in detail with reference to the accompanying drawings.

Embodiment 1

Figure 1 is a flow chart of an air gap withstand voltage measurement method provided in Embodiment 1 of the present application. This embodiment can be applied to predicting the tolerance between high potential points and low potential points in the circuit when arranging a high-voltage test circuit. In the application scenario of voltage, this method can be performed by an air gap withstand voltage measurement device. The air gap withstand voltage measurement device can be implemented in the form of hardware and/or software. The air gap withstand voltage measurement device can be configured in the controller.

In this embodiment, the electrodes between high and low potentials in the high-voltage test circuit are considered as rod-plate electrodes. The withstand voltage of the rod-plate electrode is affected by the polarity and voltage type of the test voltage in the high-voltage test. Therefore, combined with the test voltage electrode Classification calculation of withstand voltage according to the characteristics and test voltage type.

As shown in Figure 1, the air gap withstand voltage measurement method specifically includes the following steps:

Step S1: Use the interactive module to obtain the test voltage type and test voltage polarity applied in the high-voltage test.

Among them, the interactive module is used to realize the human-computer interaction function between the operator and the controller. The operator performs parameter setting and instruction issuing in the interactive module, and then the interactive module transmits relevant parameters and instructions to the controller.

In an embodiment, the interaction module may include a key module, a touch screen, a keyboard and other devices.

In one embodiment, the test voltage type includes any of the following: DC voltage, AC voltage, lightning impulse voltage or operating impulse voltage; the test voltage polarity includes any of the following: rod electrode voltage is positive polarity, plate electrode voltage is The positive polarity voltage is the negative polarity, the rod electrode voltage is the negative polarity, and the plate electrode voltage is the positive polarity voltage.

Among them, by combining any test voltage type and any test voltage polarity, an array can be obtained that represents the test voltage characteristics. The test voltage characteristics will affect the withstand voltage of the rod-plate electrode.

Step S2: Determine the target conversion formula between the withstand voltage and the air gap distance based on the test voltage type and test voltage polarity.

Among them, the air gap distance is the distance between the high potential point and the low potential point in the high voltage test circuit. The independent variables of the target conversion formula include air gap distance and environmental parameters. The dependent variable of the target conversion formula is the withstand voltage. That is to say, the target conversion formula is based on the air gap distance and environmental parameters and withstand voltage under different voltage types and voltage polarities. The functional correspondence between voltages is established.

Environmental parameters are parameters that characterize the actual atmospheric conditions during the high-pressure test. In one embodiment, the environmental parameters include but are not limited to: temperature, humidity, air pressure and other parameters in the high-pressure test environment.

In this step, the specific functional form of the target conversion formula corresponds to a set of test voltage types and test voltage polarities. That is, after the test voltage type and test voltage polarity are set, the current test voltage type and test voltage polarity can be determined. The only empirical calculation formula corresponding to the voltage polarity, the air gap distance and environmental parameters are brought into the matching target conversion formula, and the endurance corresponding to the air gap distance is calculated under the current voltage type, voltage polarity and actual atmospheric conditions. receive voltage.

Step S3: Use the ranging module to obtain the actual measured gap distance of the air gap.

Wherein, the ranging module may be a laser ranging module. The laser ranging module has good collimation performance.

In this step, the ranging module receives the measurement instruction issued by the control module, measures the air gap distance, and sends the measured air gap distance to the control module, and the control module calculates the corresponding withstand voltage based on the actual measured gap distance.

Step S4: Use the environmental parameter detection module to obtain the test environment parameters in the high-voltage test.

Among them, the test environment parameters are used to characterize the atmospheric conditions when performing high-pressure tests. The test environment parameters can be artificially set atmospheric parameters or atmospheric parameters in the test environment.

In one embodiment, the test environment parameters include but are not limited to: real-time temperature parameter t, real-time humidity parameter h and real-time air pressure parameter P under current atmospheric conditions.

In this step, the environmental parameter detection module can be set to include a temperature detection sub-module, a humidity detection sub-module and an air pressure detection sub-module. The temperature detection sub-module is used to receive the measurement instructions issued by the control module and start measuring the real-time parameters in the test environment at the current moment. Temperature parameter t, after the parameter value is stable, the measured real-time temperature parameter t is sent to the control module; the humidity detection sub-module is used to receive the measurement instruction issued by the control module and start measuring the real-time humidity parameter h in the test environment at the current moment. After the parameter value is stable, the measured real-time humidity parameter h is sent to the control module; the real-time air pressure detection sub-module is used to Receive the measurement instruction from the control module and start to measure the real-time air pressure parameter P in the test environment at the current moment. After the parameter value is stable, the measured real-time air pressure parameter P is sent to the control module, so that the control module can adjust the real-time temperature parameter t according to the real-time temperature parameter t. The humidity parameter h and the real-time air pressure parameter P correct the value of the withstand voltage.

Step S5: Determine the withstand voltage corresponding to the current air gap based on the measured gap distance, test environment parameters and target conversion formula.

In one embodiment, the target conversion formula is based on the first functional relationship between the withstand voltage and the air gap distance under standard environmental parameter conditions, and the second functional relationship between the air gap withstand voltage under standard environmental parameters and actual environmental parameters. Establish.

Among them, the first functional relationship is the air gap resistance under different voltage types, different typical electrode shapes, and different voltage polarities under standard environmental parameter conditions (for example, the standard environmental parameters can be air pressure 1.01KPa, temperature 20°C, and humidity 40%). Based on the functional correspondence between voltage and air gap distance, the first functional relationship is used to characterize the impact of changes in air gap distance on the air gap withstand voltage.

The second functional relationship is the correction coefficient of the air gap withstand voltage between standard environmental parameter conditions and actual environmental parameter conditions under different voltage types, different typical electrode shapes, and different voltage polarities. The second functional relationship can be used to characterize atmospheric conditions. Effect of changes on air gap withstand voltage.

Specifically, before predicting the air gap withstand voltage, the electrodes between high and low potentials in the high-voltage test circuit are considered as rod-plate electrodes, and the rod-plate electrode withstand voltages under different voltage types and voltage polarities are stored in advance. Empirical calculation formula between air gap distance and environmental parameters. When predicting the air gap withstand voltage, the tester first determines the test voltage type and test voltage polarity of the applied voltage during the current high-voltage test, and obtains the corresponding withstand voltage based on the matching of the test voltage type and test voltage polarity. The calculation formula is the target conversion formula, and then the actual measured gap distance and the test environment parameters under actual atmospheric conditions are substituted into the target conversion formula to calculate the current air The withstand voltage value of the gap distance under actual atmospheric conditions.

Therefore, by integrating parameter sampling and introducing empirical calculation formulas, the embodiments of the present application solve the problems of large error and poor practicality in high-voltage test withstand voltage judgment in related technologies, and achieve quantitative and intuitive calculation of air gap withstand voltage. Calculation method Simple and highly accurate, it is convenient for testers to judge the gap distance quickly and easily, and reduces the requirements for testers in test experience and knowledge of air breakdown theory. It has strong universality and is conducive to improving the safety and reliability of high-voltage tests. .

Optionally, Figure 2 is a flow chart of another air gap withstand voltage measurement method provided in Embodiment 1 of the present application. Based on Figure 1, a specific implementation of step S2 is exemplarily shown. Rather than limiting the above method steps.

As shown in Figure 2, step S2: Determine the target conversion formula between the withstand voltage and the air gap distance based on the test voltage type and test voltage polarity, including the following steps:

Step S201: Obtain at least one first conversion formula between withstand voltage and air gap distance under standard environmental parameter conditions under at least one preset voltage type and at least one preset voltage polarity.

Step S202: Obtain at least one second conversion formula between the standard environmental parameters and the actual environmental parameters of the withstand voltage under at least one preset voltage type and at least one preset voltage polarity.

Step S203: Compare the test voltage type and test voltage polarity with the preset voltage type and preset voltage polarity, determine the first conversion formula corresponding to the consistent comparison array as the first target formula, and compare The second conversion formula corresponding to the consistent array is determined as the second target formula.

Step S204: Determine the target conversion formula according to the first target formula and the second target formula.

Specifically, the above-mentioned steps S201 to S204 describe a specific implementation method of determining the target conversion formula through a table look-up method, wherein the table look-up method is implemented based on a pre-stored empirical calculation formula list, and the empirical calculation formula list is used to represent the pre-stored empirical calculation formula list. Set the mapping relationship between voltage type, preset voltage polarity and conversion formula.

In this embodiment, the preset voltage types include but are not limited to: DC voltage, AC voltage, lightning impulse voltage or operating impulse voltage; the test voltage polarity includes but is not limited to: the rod electrode voltage is positive polarity, and the plate electrode voltage is negative polarity. The positive polarity voltage is, the rod electrode voltage is negative polarity, and the plate electrode voltage is positive polarity voltage. Before constructing the first conversion formula and the second conversion formula, the preset voltage types and preset voltage polarities can be arranged and combined to obtain an array representing voltage characteristics. For example, DC voltage and positive polarity constitute a voltage characteristics array. DC voltage and negative polarity form a voltage characteristic array, AC voltage and positive polarity form a voltage characteristic array,..., and so on, multiple voltage characteristic arrays can be obtained.

In step S201, the independent variable of the first conversion formula can be the gap distance, the dependent variable of the first conversion formula can be the withstand voltage under standard environmental parameter conditions, and the first conversion formula has a one-to-one correspondence with any voltage characteristic array, The first conversion formula is used to express the above-mentioned first functional relationship.

For example, if the gap distance is defined as d and the withstand voltage under standard environmental parameter conditions is U _bs , then the first conversion formula can be expressed as U _bs =f(d). The mapping relationship between different preset voltage types and different preset voltage polarities and the first conversion formula is shown in Table 1.

As shown in Table 1, in the standard environmental parameter conditions, when the voltage type is DC voltage and the voltage polarity is the positive polarity of the rod electrode, the withstand voltage of the rod plate electrode and the air gap distance satisfy the first conversion The formula is U _bs = f _dc+ (d); when the voltage type is DC voltage and the voltage polarity is the negative polarity of the rod electrode, the first conversion formula that satisfies the withstand voltage of the rod plate electrode and the air gap distance is U _bs = f _dc- (d); When the voltage type is AC voltage, the first conversion formula that satisfies the withstand voltage of the rod-plate electrode and the air gap distance is U _bs = f _ac (d); ...; and so on, each The voltage characteristic array composed of the preset voltage type and the preset voltage polarity corresponds to the unique first conversion formula.

In step S202, the independent variables of the second conversion formula include environmental parameters and/or measured gap distances, the dependent variables of the second conversion formula are correction coefficients, the second conversion formula has a one-to-one correspondence with any voltage characteristic array, and the second conversion formula The formula is used to express the second functional relationship described above.

For example, if the environmental parameters are defined as real-time temperature parameter t, real-time humidity parameter h and real-time air pressure parameter P, the gap distance is d, and the correction coefficient is eta _b , then the second conversion formula can be expressed as eta _b =f(t, h, P), or, eta _b =f (t, h, P, d). The mapping relationship between different preset voltage types, different preset voltage polarities and the second conversion formula is shown in Table 2.

As shown in Table 2, when the voltage type is DC voltage and the voltage polarity is the positive polarity of the rod electrode, The second conversion formula that the real-time temperature parameter t, real-time humidity parameter h, real-time air pressure parameter P and correction coefficient ηb satisfy is eta _b = f _dc+ (t, h, P, d); when the voltage type is DC voltage, the voltage polarity When it is the negative polarity of the rod electrode, the second conversion formula satisfied by the real-time temperature parameter t, real-time humidity parameter h, real-time air pressure parameter P and correction coefficient ηb is η _b =f _dc- (t, h, P, d); in voltage When the type is AC voltage, the second conversion formula satisfied by the real-time temperature parameter t, real-time humidity parameter h, real-time air pressure parameter P and correction coefficient eta is eta _b = f _ac (t, h, P, d); ...; with By analogy, each voltage characteristic array composed of preset voltage type and preset voltage polarity corresponds to a unique second conversion formula.

In step S203, the test voltage type and test voltage polarity set by the tester are compared with the preset voltage type and preset voltage polarity in Table 1 and Table 2, and the first conversion formula obtained by looking up the table is determined. is the first target formula, and the second conversion formula obtained by looking up the table is determined as the second target formula.

In step S204, the target conversion formula can be expressed as: U _b =n _b *U _bs . Among them, U _b represents the withstand voltage corresponding to the measured gap distance under actual atmospheric conditions and voltage characteristics, eta _b is the dependent variable of the first target formula, and U _bs is the dependent variable of the second target formula.

Specifically, as shown in Table 1 and Table 2, if the test voltage type set by the tester is DC voltage and the test voltage polarity is the positive polarity of the rod electrode, the target conversion formula determined by looking up the table can be expressed as: U _b = f _dc+ (t, h, P, d)*f _dc+ (d);

If the test voltage type set by the tester is DC voltage and the test voltage polarity is the negative polarity of the rod electrode, the target conversion formula determined by looking up the table can be expressed as: U _b =f _dc- (t, h, P, d)* f _dc- (d);

If the test voltage type set by the tester is AC voltage, the target conversion formula determined by looking up the table can be expressed as: U _b =f _ac (t, h, P, d)*f _ac (d);

If the test voltage type set by the tester is lightning impulse voltage, and the test voltage polarity is the positive polarity of the rod electrode, the target conversion formula can be expressed as: U _b =f _ld+ (t, h, P, d)*f _ld+ (d );

If the test voltage type set by the tester is lightning impulse voltage, the test voltage polarity is rod electrode. Negative polarity, the target conversion formula can be expressed as: U _b =f _ld- (t, h, P, d)*f _ld- (d);

If the test voltage type set by the tester is operating impulse voltage, and the test voltage polarity is the positive polarity of the rod electrode, the target conversion formula can be expressed as: U _b =f _cz+ (t, h, P, d)*f _cz+ (d );

If the test voltage type set by the tester is operating impulse voltage and the test voltage polarity is the negative polarity of the rod electrode, the target conversion formula can be expressed as: U _b =f _cz- (t, h, P, d)*f _cz- (d).

After obtaining the target conversion formula, substitute the measured actual gap distance d, real-time temperature parameter t, real-time humidity parameter h and real-time air pressure parameter P into the above target conversion formula. The calculated withstand voltage U _b is the actual measured distance of the air gap. Withstand voltage value under actual atmospheric conditions.

Therefore, this application can determine the target conversion formula by introducing empirical calculation formulas and look-up table methods. The target conversion formula integrates the empirical calculation formula between withstand voltage and gap distance and the correction method of withstand voltage under different atmospheric conditions. Achieving quantitative and intuitive calculation of withstand voltage values solves the problems of large errors and poor practicability in high-voltage test withstand voltage judgments in related technologies. The calculation method is simple and highly accurate, making it easy for testers to quickly and easily judge gap distances, reducing It requires little testing experience and knowledge of air breakdown theory on test personnel and has strong universal applicability.

Optionally, the first conversion formula includes at least one of the following: a linear function of one variable, a multivariate function of one variable, an inverse proportional function, or a piecewise function of one variable; the second conversion formula includes at least one of the following: a linear function of multiple variables, a multivariate function of multiple variables. function or multivariate piecewise function.

Among them, the specific function types in the first conversion formula and the second conversion formula and the relevant parameters in the functions can be obtained by consulting existing relevant research materials or a large number of experiments, and there are no specific restrictions on them.

For example, by consulting existing relevant research materials, a first pre-stored list of conversion formulas shown in Table 3 and a pre-stored list of second conversion formulas shown in Table 4 are established.

As shown in Table 3, the unit of U _bs is kV and the unit of d is cm.

As shown in Table 4, the unit of the measured gap distance d is cm, the unit of the real-time temperature parameter t is ℃, the unit of the real-time humidity parameter h is g/m ³ , and the unit of the real-time air pressure parameter P is kPa.

Referring to Table 3 and Table 4, define an air gap, the applied voltage type is DC voltage, the voltage polarity is negative polarity, the measured gap distance d is equal to 10cm, the real-time temperature parameter t is 30°C, and the real-time humidity parameter h is 15g/m ³ and the real-time air pressure parameter P is 100kPa.

After obtaining that the applied voltage type is DC voltage and the voltage polarity is negative polarity, look up Table 3 and Table 4 to determine that the first target formula is U _bs =10d and the second target formula is η _b = Target conversion formula U _b = η _b *U _bs , substitute the measured gap distance d equal to 10cm into the first target formula, and calculate U _bs = 100kV, set the real-time temperature parameter t to 30°C, and the real-time humidity parameter h to 15g/m ³ , the real-time air pressure parameter P is 100kPa and is substituted into the second target formula to obtain eta _b = 1.004. U _bs = 100kV and eta _b = 1.004 are substituted into the target conversion formula to calculate the withstand voltage value of the measured distance of the air gap under actual atmospheric conditions. U _b =100.4kV, realizing quantitative calculation of withstand voltage value.

In one embodiment, when determining the target conversion formula, a certain margin can also be set for the withstand voltage value to ensure that the gap distance is sufficient for the applied voltage required for the high-voltage test, which is beneficial to improving system safety and reliability.

It should be noted that the formulas in Table 3 and Table 4 are only examples of conversion formulas and are not limitations of the above conversion formulas. Those skilled in the art can also modify and update the above conversion formula according to the development of actual research technology. This embodiment does not limit the function type and related parameters of the conversion formula.

Optionally, FIG. 3 is a flow chart of yet another air gap withstand voltage measurement method provided in Embodiment 1 of the present application. Based on FIG. 1 , a parameter reminder function is implemented.

As shown in Figure 3, after determining the withstand voltage corresponding to the current air gap, the air gap withstand voltage calculation method also includes:

Step S6: Display and remind the tester based on at least one of the withstand voltage U _b , the measured gap distance d and the test environment parameters.

Specifically, the withstand voltage U _b , measured gap distance d, real-time temperature parameter t, real-time humidity parameter h and real-time air pressure parameter P can be transmitted to the display terminal through wireless communication technology, making it convenient for testers to quickly and easily judge the gap distance. and data viewing.

Embodiment 2

Figure 4 is a schematic structural diagram of an air gap withstand voltage measurement device provided in Embodiment 2 of the present application. The device is used to execute the above air gap withstand voltage measurement method and has functional modules and beneficial effects corresponding to the execution method.

As shown in Figure 4, the air gap withstand voltage measurement device 00 includes: an interactive module 1, used to obtain the test voltage type and test voltage polarity applied in the high-voltage test; a ranging module 2, used to obtain the actual measurement of the air gap Gap distance; environmental parameter detection module 3, used to obtain test environment parameters in high-voltage tests; control module 4, used to determine the target conversion formula between withstand voltage and gap distance based on test voltage type and test voltage polarity, target The independent variables of the conversion formula include gap distance and environmental parameters; and the withstand voltage corresponding to the current air gap is determined based on the measured gap distance, test environment parameters and target conversion formula.

In one embodiment, the interaction module 1 may be a key module, a touch screen, a keyboard or other equipment.

In one embodiment, the ranging module 2 can be a laser ranging module, and the laser ranging module has good collimation performance.

In one embodiment, the target conversion formula is based on the first functional relationship between the withstand voltage and the air gap distance under standard environmental parameter conditions, and the second functional relationship between the air gap withstand voltage under standard environmental parameters and actual environmental parameters. Establish. Among them, the first functional relationship is the air gap resistance under different voltage types, different typical electrode shapes, and different voltage polarities under standard environmental parameter conditions (for example, the standard environmental parameters can be air pressure 1.01KPa, temperature 20°C, and humidity 40%). Based on the functional correspondence between voltage and air gap distance, the first functional relationship is used to characterize the impact of changes in air gap distance on the air gap withstand voltage. The second functional relationship is the correction coefficient of the air gap withstand voltage between standard environmental parameter conditions and actual environmental parameter conditions under different voltage types, different typical electrode shapes, and different voltage polarities. The second functional relationship can be used to characterize atmospheric conditions. Effect of changes on air gap withstand voltage.

Among them, the test voltage type includes any of the following: DC voltage, AC voltage, lightning impulse voltage voltage or operating impulse voltage; the test voltage polarity includes any of the following: the rod electrode voltage is positive polarity and the rod electrode voltage is negative polarity.

Specifically, before predicting the air gap withstand voltage, the control module 4 pre-stores empirical calculation formulas between the rod-plate electrode withstand voltage, air gap distance and environmental parameters under different voltage types and different voltage polarities. When predicting the air gap withstand voltage, the tester first sets the test voltage type and test voltage polarity through the interactive module 1. The control module 4 receives the test voltage type and test voltage polarity, and based on the test voltage type and test voltage polarity The calculation formula of the corresponding withstand voltage is obtained by matching, that is, the target conversion formula, and then the control module 4 issues a measurement instruction to the ranging module 2 and the environmental parameter detection module 3. The ranging module 2 starts measuring after receiving the measurement instruction until The actual measured gap distance of the air gap is obtained; the environmental parameter detection module 3 starts measuring after receiving the measurement instruction until the test environment parameters under actual atmospheric conditions are obtained. The control module 4 receives the actual measured gap distance and the measured gap distance under actual atmospheric conditions. Test environment parameters, and substitute the test environment parameters and measured gap distance into the target conversion formula to calculate the withstand voltage value of the current air gap distance under actual atmospheric conditions. By integrating multiple parameter sampling modules and introducing empirical calculation formulas, the existing problems of high voltage test withstand voltage judgment errors and poor practicability are solved, and the air gap withstand voltage can be calculated quantitatively and intuitively with a simple calculation method and high accuracy. , which facilitates testers to judge the gap distance conveniently and quickly, reduces the requirements for testers in test experience and knowledge of air breakdown theory, has strong universal applicability, and is conducive to improving the safety and reliability of high-voltage tests.

Optionally, as shown in FIG. 4 , the environmental parameter detection module 3 includes any one or more combinations of a temperature detection sub-module 301 , a humidity detection sub-module 302 and an air pressure detection sub-module 303 .

Optionally, the control module 4 includes a storage sub-module and a comparison sub-module. The storage sub-module is used to store the withstand voltage and air under at least one preset voltage type and at least one preset voltage polarity under standard environmental parameter conditions. at least one first conversion formula between the gap distance, and at least one preset voltage Type, at least one second conversion formula of the withstand voltage between the standard environmental parameters and the actual environmental parameters under at least one preset voltage polarity; the comparison sub-module is used to compare the test voltage type and test voltage polarity with the preset The voltage type and the preset voltage polarity are compared, the first conversion formula corresponding to the consistent comparison array is determined as the first target formula, and the second conversion formula corresponding to the consistent comparison array is determined as the second target formula , and determine the target conversion formula according to the first target formula and the second target formula.

In one embodiment, the independent variable of the first conversion formula is the air gap distance, the dependent variable of the first conversion formula is the withstand voltage under standard environmental parameter conditions; the independent variables of the second conversion formula include environmental parameters and/or air gaps. distance, the dependent variable of the second conversion formula is the correction coefficient.

In one embodiment, the first conversion formula includes at least one of the following: a linear function of one variable, a multiple function of one variable, an inverse proportional function, or a piecewise function of one variable; the second conversion formula includes at least one of the following: a linear function of multiple variables, a multivariate multivariate function. subfunction or multivariate piecewise function.

In this embodiment, the first conversion formula, the second conversion formula and the target conversion formula may refer to the above-mentioned Tables 1 to 4, and will not be described again here.

In one embodiment, the preset voltage type includes at least one of the following: DC voltage, AC voltage, lightning impulse voltage or operating impulse voltage; the preset voltage polarity includes at least one of the following: the rod electrode voltage is positive polarity and the rod electrode The electrode voltage is negative polarity.

Optionally, FIG. 5 is a schematic structural diagram of another air gap withstand voltage measuring device provided in Embodiment 2 of the present application. Based on FIG. 4 , the embodiment in FIG. 5 adds a display reminder function.

As shown in Figure 5, the air gap withstand voltage measuring device 00 also includes: a display terminal 5. The display terminal 5 is communicatively connected with the control module 4. The display terminal 5 is used to display the withstand voltage, the measured gap distance and the test environment parameters. at least one.

In one embodiment, the display terminal 5 includes but is not limited to: laptop computers, desktop computers, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and smart terminal devices with display functions. Prepare.

Embodiment 3

FIG. 6 is a schematic structural diagram of a computer device provided in Embodiment 3 of the present application, showing the structure of a computer device 10 that can be used to implement the air gap withstand voltage measurement method of the present application. Computer device 10 is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. Electronic devices may also represent various forms of mobile devices, such as personal digital assistants, cellular phones, smart phones, wearable devices (eg, helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions are examples only and are not intended to limit the implementation of the present application as described and/or claimed herein.

As shown in Figure 6, the computer device 10 includes at least one processor 11, and a memory communicatively connected to the at least one processor 11, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc., wherein the memory stores There is a computer program that can be executed by at least one processor. The processor 11 can perform the operation according to the computer program stored in the read-only memory (ROM) 12 or loaded from the storage unit 18 into the random access memory (RAM) 13. Various appropriate actions and processes are performed to enable the processor to perform the air gap withstand voltage measurement method described above. In the RAM 13, various programs and data required for the operation of the computer device 10 can also be stored. The processor 11, the ROM 12 and the RAM 13 are connected to each other via the bus 14. An input/output (I/O) interface 15 is also connected to bus 14 .

Multiple components in the computer device 10 are connected to the I/O interface 15, including: an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; storage Unit 18, such as a magnetic disk, optical disk, etc.; and communication unit 19, such as a network card, modem, wireless communication transceiver, etc. The communication unit 19 allows the computer device 10 to exchange information/data with other devices through computer networks such as the Internet and/or various telecommunications networks.

Processor 11 may be a variety of general and/or special purpose processing components having processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various dedicated artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, digital signal processing processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 11 executes each of the above-described methods and processes, such as the above-mentioned air gap withstand voltage measurement method.

In some embodiments, the above air gap withstand voltage measurement method can be implemented as a computer program, which is tangibly included in a computer-readable storage medium, such as the storage unit 18 .

In some embodiments, part or all of the computer program may be loaded and/or installed onto the computer device 10 via the ROM 12 and/or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the air gap withstand voltage measurement method described above may be performed. Alternatively, in other embodiments, the processor 11 may be configured to perform the above air gap withstand voltage measurement method in any other suitable manner (for example, by means of firmware).

Various implementations of the systems and techniques described above may be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on a chip implemented in a system (SOC), load programmable logic device (CPLD), computer hardware, firmware, software, and/or a combination thereof. These various implementations may include implementation in one or more computer programs, which may be Executed and/or interpreted on a programmable system including at least one programmable processor, which may be a special purpose or general purpose programmable processor, capable of receiving data from a storage system, at least one input device, and at least one output device and instructions, and transmits the data and instructions to the storage system, the at least one input device, and the at least one output device.

Computer programs for implementing the methods of the present application may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that the computer program, when executed by the processor, causes the functions/operations specified in the flowcharts and/or block diagrams to be implemented. A computer program may execute entirely on the machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.

In the context of this application, a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. Computer-readable storage media may include, but are not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or devices, or any suitable combination of the foregoing. Alternatively, the computer-readable storage medium may be a machine-readable signal medium. More specific examples of machine-readable storage media would include one or more wire-based electrical connections, laptop disks, hard drives, random access memory (RAM), read only memory (ROM), erasable programmable read only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination of the above.

To provide interaction with a user, the systems and techniques described herein may be implemented on an electronic device having a display device (eg, a CRT (cathode ray tube)) for displaying information to the user or an LCD (liquid crystal display) monitor); and a keyboard and pointing device (eg, a mouse or trackball) through which a user can provide input to the electronic device. Other kinds of devices may also be used to provide interaction with the user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and may be provided in any form, including Acoustic input, voice input or tactile input) to receive input from the user.

The systems and techniques described herein may be implemented in a computing system that includes back-end components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes front-end components (e.g., A user's computer having a graphical user interface or web browser through which the user can interact with implementations of the systems and technologies described herein), or including such backend components, middleware components, or any combination of front-end components in a computing system. The components of the system may be interconnected by any form or medium of digital data communication (eg, a communications network). Examples of communication networks include: local area network (LAN), wide area network (WAN), blockchain network, and the Internet.

Computing systems may include clients and servers. Clients and servers are generally remote from each other and typically interact over a communications network. The relationship of client and server is created by computer programs running on corresponding computers and having a client-server relationship with each other. The server can be a cloud server, also known as cloud computing server or cloud host. It is a host product in the cloud computing service system to solve the difficult management and business scalability problems in physical hosts and VPS services in related technologies. Weak flaws.

It should be understood that various forms of the process shown above may be used, with steps reordered, added or deleted. For example, each step described in this application may be executed in parallel or sequentially. It can be performed in different orders, and as long as the desired results of the technical solution of the present application can be achieved, there is no limitation here.

Claims (10)

1. A method for calculating air gap withstand voltage, including the following steps:

   Use the interactive module to obtain the test voltage type and test voltage polarity applied in the high-voltage test;

   The target conversion formula between the withstand voltage and the air gap distance is determined according to the test voltage type and the test voltage polarity. The target conversion formula is based on the air gap distance and environmental parameters under different voltage types and voltage polarities. The functional correspondence between withstand voltages is established;

   Use the ranging module to obtain the actual measured gap distance of the air gap;

   Use the environmental parameter detection module to obtain the test environment parameters in the high-voltage test;

   The withstand voltage corresponding to the current air gap is determined according to the measured gap distance, the test environment parameters and the target conversion formula.
2. The method according to claim 1, wherein the target conversion formula between the withstand voltage and the air gap distance is determined according to the test voltage type and the test voltage polarity, including:

   Obtain at least one first conversion formula between withstand voltage and air gap distance under standard environmental parameter conditions under at least one preset voltage type and at least one preset voltage polarity, and the first conversion formula is consistent with any The array composed of the preset voltage type and any of the preset voltage polarities corresponds one to one;

   Obtain at least one second conversion formula for withstand voltage between standard environmental parameters and actual environmental parameters under at least one preset voltage type and at least one preset voltage polarity. The second conversion formula is consistent with any of the above An array consisting of a preset voltage type and any of the preset voltage polarities corresponds one to one;

   Compare the test voltage type and the test voltage polarity with the preset voltage type and the preset voltage polarity, and determine the first conversion formula corresponding to the consistent comparison array as the first target formula , and determine the second conversion formula corresponding to the consistent comparison array as the second target formula;

   The target conversion formula is determined according to the first target formula and the second target formula.
3. The method according to claim 2, wherein the independent variable of the first conversion formula is the air gap distance, and the dependent variable of the first conversion formula is the withstand voltage under standard environmental parameter conditions;

   The independent variables of the second conversion formula include environmental parameters and/or air gap distances, and the dependent variables of the second conversion formula are correction coefficients.
4. The method according to claim 2, wherein the first conversion formula includes at least one of the following: a linear function of one variable, a multiple function of one variable, an inverse proportional function or a piecewise function of one variable;

   The second conversion formula includes at least one of the following: a multivariate linear function, a multivariate multiple-order function, or a multivariate piecewise function.
5. The method according to claim 2, wherein the preset voltage type includes at least one of the following: DC voltage, AC voltage, lightning impulse voltage or operating impulse voltage;

   The preset voltage polarity includes at least one of the following: the rod electrode voltage is positive polarity and the rod electrode voltage is negative polarity.
6. The method according to any one of claims 1 to 4, wherein after determining the withstand voltage corresponding to the current air gap, it further includes:

   Display and remind the tester based on at least one of the withstand voltage, the measured gap distance and the test environment parameter.
7. An air gap withstand voltage measurement device, used to perform the air gap withstand voltage measurement method according to any one of claims 1 to 6, the device includes:

   Interactive module, used to obtain the test voltage type and test voltage polarity applied in high-voltage tests;

   Ranging module, used to obtain the actual measured gap distance of the air gap;

   Environmental parameter detection module, used to obtain test environment parameters in high-voltage tests;

   A control module configured to determine a target conversion formula between the withstand voltage and the air gap distance according to the test voltage type and the test voltage polarity. The target conversion formula is based on the air gap distance under different voltage types and voltage polarities. Establishing a functional correspondence between distance and environmental parameters and withstand voltage; and determining the current value based on the measured gap distance, the test environment parameters and the target conversion formula Withstand voltage corresponding to the air gap.
8. The device according to claim 7, further comprising: a display terminal, the display terminal is communicatively connected to the control module, the display terminal is used to display the withstand voltage, the measured gap distance and the test environment At least one of the parameters.
9. A computer device consisting of:

   at least one processor; and

   a memory communicatively connected to the at least one processor; wherein,

   The memory stores a computer program executable by the at least one processor, the computer program being executed by the at least one processor, so that the at least one processor can execute any one of claims 1-6 Described air gap withstand voltage measurement method.
10. A computer-readable storage medium, the computer-readable storage medium stores computer instructions, and the computer instructions are used to implement the air gap withstand voltage measurement described in any one of claims 1-6 when executed by a processor. method.