Gas arc cooling performance detection method and related device

Abstract

The invention discloses a gas arc cooling performance detection method and a related device, and relates to the technical field of electrics. According to the method, the circuit breaker is controlled to be switched on and off at the arcing time point in the preset arcing interval corresponding to each to-be-detected gas medium, and the arcing information corresponding to each arcing time point is obtained; according to the voltage signal and the current signal between the fractures of the circuit breaker in the arcing information corresponding to each arcing time point, a target constant corresponding to each arcing time point is determined, and the target constant represents the rate at which the arc resistance value changes by the same multiple; determining a constant accumulated value according to a target constant corresponding to each arcing time point in a preset arcing interval corresponding to each to-be-detected gas medium; the constant accumulated value can reflect the accumulated strength of the cooling efficiency of the gas media to be detected on the electric arc in the arcing interval, and comparing the constant accumulated value corresponding to each gas medium to be detected to determine the electric arc cooling performance difference between the gas media to be detected.

Description

TECHNICAL FIELD

[0001] The present application relates to the electrical technical field, and in particular to an arc cooling performance detection method of a gas and related device. BACKGROUND

[0002] Arc is a high-temperature, high-conductivity plasma, and its essence is the process of breaking current of a circuit breaker. Effective control and rapid extinction of arc are key factors to ensure safe operation of the circuit breaker, improve reliability of the equipment, and stabilize the power system. In order to enhance the arc extinction ability, different gas media are widely used for cooling in engineering, such as air, nitrogen, sulfur hexafluoride (SF6), mixed gas, etc. These gases cool the high-temperature plasma in the arc channel through heat transfer, convection, diffusion, and other mechanisms, reduce the arc temperature and conductivity, and thus promote the arc extinction.

[0003] However, the thermal physical properties of different gases differ greatly, and their arc cooling abilities are significantly different. The existing simulation of the axial arc before the current zero point (arc extinction) can discuss the change rule of different arc cooling factors (thermal convection, heat conduction, etc.) in the proportion of arc energy at different breaking current sizes, i.e., different positions, and calculate the cooling performance of the arc by different arc cooling factors. However, in the actual breaking process, as the arc duration increases, the gas pressure in the pressure chamber (expansion chamber) upstream of the nozzle decreases rapidly, and the gas flow speed in the nozzle may decrease significantly in a period before the long-arc current crosses zero, the binding effect of the arc decreases, the arc is distorted, and the arc no longer appears in the form of axial arc. Therefore, the cooling performance of the arc by different arc cooling factors obtained by the above simulation is different from the actual test results, which leads to the fact that the arc extinction medium selected according to the simulation conclusion cannot meet the circuit requirements, and affects the safety of the circuit.

[0004] Therefore, how to detect the arc cooling ability of different gases has become a technical problem to be solved in the process of designing a circuit breaker and selecting a gas. SUMMARY

[0005] In view of the above problems, the present application provides an arc cooling performance detection method of a gas and related device to achieve the purpose of detecting the arc cooling ability of different gases. The specific scheme is as follows:

[0006] The first aspect of the present application provides an arc cooling performance detection method of a gas, comprising:

[0007] At each arc time point in a preset arc interval corresponding to each to-be-tested gas medium, a circuit breaker is controlled to be opened to obtain arc information corresponding to each arc time point, the arc information at least including voltage signals and current signals between the breaking points of the circuit breaker within an arc duration represented by the arc time point; the preset arc interval is defined by a minimum arc duration and a maximum arc duration;

[0008] According to the voltage signals and the current signals between the breaking points of the circuit breaker in the arc information corresponding to each arc time point, a target constant corresponding to each arc time point is determined, the target constant representing a rate of change of the arc resistance value by the same multiple;

[0009] According to the target constant corresponding to each arc time point in the preset arc interval corresponding to each to-be-tested gas medium, a constant cumulative value is determined;

[0010] By comparing the constant cumulative values corresponding to each to-be-tested gas medium, differences in arc cooling performance between the to-be-tested gas media are determined.

[0011] In a possible implementation, the determining of the constant cumulative value according to the target constant corresponding to each arc time point in the preset arc interval corresponding to each to-be-tested gas medium includes:

[0012] According to the target constant corresponding to each arc time point in the preset arc interval corresponding to each to-be-tested gas medium, the target constant corresponding to the arc time point of the preset arc interval is integrated to obtain a constant cumulative value.

[0013] In a possible implementation, the determining of the constant cumulative value according to the target constant corresponding to each arc time point in the preset arc interval corresponding to each to-be-tested gas medium includes:

[0014] The preset arc interval corresponding to each to-be-tested gas medium is divided into a preset number of time periods;

[0015] A mean value of the target constant corresponding to the arc time point included in each time period is determined;

[0016] The length of each time period is multiplied by the mean value of the target constant corresponding to the time period to obtain a product result of each time period;

[0017] The product results of all the time periods in the preset arc interval corresponding to each to-be-tested gas medium are summed to obtain a constant cumulative value corresponding to each to-be-tested gas medium.

[0018] In a possible implementation, the target constant corresponding to each of the arcing time points is determined according to the voltage signal and the current signal between the breaking points of the circuit breaker in the arcing information corresponding to each of the arcing time points, and the target constant represents a rate of the same multiple of the arc resistance value change, and the target constant comprises:

[0019] The arc resistance value corresponding to a preset number of collection time points in the breaking process of the circuit breaker at each of the arcing time points is determined according to the voltage signal and the current signal between the breaking points of the circuit breaker in the arcing information corresponding to each of the arcing time points.

[0020] The arc resistance curve function in the breaking process of the circuit breaker at each of the arcing time points corresponding to each of the to-be-tested gas media is fitted based on the arc resistance values corresponding to the preset number of collection time points.

[0021] The characteristic time constant of each of the to-be-tested gas media at each of the arcing time points is determined based on the arc resistance curve function in the breaking process of the circuit breaker at each of the arcing time points corresponding to each of the to-be-tested gas media.

[0022] The reciprocal of the characteristic time constant of each of the to-be-tested gas media at each of the arcing time points is determined as the target constant of each of the to-be-tested gas media at each of the arcing time points.

[0023] In a possible implementation, the process of determining the shortest arcing duration and the longest arcing duration corresponding to the to-be-tested gas media comprises:

[0024] The circuit breaker is controlled to break down under the action of the to-be-tested gas medium according to a preset arcing critical value, and the preset arcing critical value comprises a preset shortest arcing duration and a preset longest arcing duration.

[0025] It is determined whether the breaking down is successful.

[0026] If the breaking down is successful, the preset arcing critical value is adjusted by a preset amplitude and a first adjustment direction corresponding to the preset arcing critical value, and the circuit breaker is controlled to break down according to the adjusted preset arcing critical value until the breaking down fails, and the arcing duration corresponding to the previous breaking down of the breaking down failure is taken as an arcing duration critical value; the first adjustment direction corresponding to the preset shortest arcing duration is downward adjustment, and the first adjustment direction corresponding to the preset longest arcing duration is upward adjustment.

[0027] If the opening fails, a preset amplitude and a second adjustment direction corresponding to the preset arc burning critical value are used to adjust the preset arc burning critical value, and the circuit breaker is controlled to open according to the adjusted preset arc burning critical value until the opening succeeds, and an arc burning time length at the time of the opening success is taken as an arc burning time length critical value; the second adjustment direction corresponding to the preset shortest arc burning time length is upward adjustment, and the second adjustment direction corresponding to the preset longest arc burning time length is downward adjustment.

[0028] The second aspect of the present application provides a gas arc cooling performance detection system, comprising: an arc chamber, an arc burning information acquisition module and a data processing unit.

[0029] The arc chamber comprises a circuit breaker and a pre-charged gas medium to be detected.

[0030] The arc burning information acquisition module is configured to acquire arc burning information of the circuit breaker in each opening process in the arc chamber.

[0031] The data processing unit is configured to implement the gas arc cooling performance detection method of the first aspect or any implementation manner of the first aspect.

[0032] The third aspect of the present application provides a gas arc cooling performance detection device, comprising:

[0033] An opening control unit is configured to control the circuit breaker to open at an arc burning time point in a preset arc burning interval corresponding to each gas medium to be detected, to obtain arc burning information corresponding to each arc burning time point, wherein the arc burning information at least includes voltage signals and current signals between the breaking points of the circuit breaker in an arc burning time length represented by the arc burning time point; and the preset arc burning interval is defined by a shortest arc burning time length and a longest arc burning time length.

[0034] A constant determination unit is configured to determine a target constant corresponding to each arc burning time point according to the voltage signals and the current signals between the breaking points of the circuit breaker in the arc burning information corresponding to each arc burning time point, wherein the target constant represents a rate of the same multiple of arc resistance value change.

[0035] A constant accumulation unit is configured to determine a constant accumulation value according to the target constant corresponding to each arc burning time point in the preset arc burning interval corresponding to each gas medium to be detected.

[0036] A performance comparison unit is configured to compare the constant accumulation values corresponding to each gas medium to be detected, to determine arc cooling performance differences between the gas media to be detected.

[0037] The fourth aspect of the present application provides a computer program product, comprising computer readable instructions, which, when executed on an electronic device, cause the electronic device to implement the arc cooling performance detection method of the gas of the first aspect or any implementation manner of the first aspect.

[0038] The fifth aspect of the present application provides an electronic device, comprising at least one processor and a memory connected to the processor, wherein:

[0039] The memory is configured to store a computer program;

[0040] The processor is configured to execute the computer program, so that the electronic device can implement the arc cooling performance detection method of the gas of the first aspect or any implementation manner of the first aspect.

[0041] The sixth aspect of the present application provides a computer storage medium, which carries one or more computer programs, which, when executed by an electronic device, can cause the electronic device to implement the arc cooling performance detection method of the gas of the first aspect or any implementation manner of the first aspect.

[0042] By the above technical solution, the arc cooling performance detection method of the gas provided by the present application captures the arc information at different arc time points within the interval limited by the shortest arc burning time and the longest arc burning time of each to-be-detected gas medium, so as to cover the detection of distorted arcs. Further, according to the voltage signal and the current signal between the breaking points of the circuit breaker measured within the arc burning time represented by each arc time point under the action of each to-be-detected gas medium, the arc resistance characteristics are extracted, and a target constant is quantified, which can represent the rate of the same multiple of the change of the arc resistance value. The transient cooling efficiency at a single arc time point is converted into a constant cumulative value representing the cooling cumulative strength within a preset time, which can reflect the cumulative strength of the cooling efficiency of the to-be-detected gas medium on the arc in the arc burning interval. The greater the constant cumulative value, the higher the cooling efficiency of the gas medium and the more complete the release of arc energy, thereby providing a high-sensitivity, full-dynamic quantitative evaluation standard for the selection of circuit breaker media. BRIEF DESCRIPTION OF DRAWINGS

[0043] The above and other features, advantages, and aspects of the embodiments of the present disclosure will become more apparent by describing in detail the following specific embodiments with reference to the attached drawings. Throughout the drawings, the same or similar reference numerals refer to the same or similar elements. It should be understood that the drawings are schematic, and the original and elements are not necessarily drawn according to the scale.

[0044] Figure 1 A system architecture diagram for implementing the arc cooling performance detection method of the gas provided by the embodiments of the present application;

[0045] Figure 2 A flowchart of a method for detecting arc cooling performance of a gas is provided in an embodiment of the present application.

[0046] Figure 3 An example graph of a target constant variation curve is provided in an embodiment of the present application.

[0047] Figure 4 An example graph of another target constant variation curve is provided in an embodiment of the present application.

[0048] Figure 5 A structural schematic diagram of a device for detecting arc cooling performance of a gas is provided in an embodiment of the present application.

[0049] Figure 6 A structural schematic diagram of an electronic device is provided in an embodiment of the present application. DETAILED DESCRIPTION

[0050] The embodiments of the present application are described below in conjunction with the accompanying drawings. The terms used in the implementation part of the present application are only used to explain the specific embodiments of the present application, and are not intended to limit the present application.

[0051] The embodiments of the present application are described below in conjunction with the accompanying drawings. It is known to those of ordinary skill in the art that, as technology develops and new scenarios appear, the technical solutions provided by the embodiments of the present application are also applicable to similar technical problems.

[0052] The terms "first", "second", and the like in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the terms used in this way can be interchanged under appropriate circumstances, and this is only a distinguishing way used in the description of the embodiments of the present application to describe the objects with the same attributes. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, so that the processes, methods, systems, products or devices containing a series of units do not have to be limited to those units, but can include other units that are not clearly listed or inherent to these processes, methods, products or devices.

[0053] The present application can be applied in the field of electrical detection, and the following will take detecting arc cooling performance of different gases as an example to introduce multiple application scenarios falling into products.

[0054] First, an optional application scenario of the present application is introduced. Sulfur hexafluoride (SF6) has been widely used in medium and high voltage switchgear for a long time due to its excellent insulation performance and strong arc extinguishing ability. However, SF6 is also a gas with extremely strong greenhouse effect. In order to improve environmental protection, common replacement schemes include pure gas (such as CO2, N2), mixed gas (such as C4F7N / CO2, C5F 10 O / CO2, etc.) and new synthetic environmentally friendly gas. In order to ensure that the replacement scheme still has good breaking performance (i.e. arc extinguishing ability, cooling performance), the cooling performance of each replacement scheme needs to be detected and evaluated.

[0055] The existing detection method uses CFD and multi-physical field simulation software (such as COMSOL, FLUENT combined with user-defined UDF) to model and simulate the arc extinguishing process, analyzes the change law of arc voltage and resistance under different gases, and detects the cooling performance of each gas medium. According to the background art, the existing simulation detection is usually for the simulation of axial arc before the current zero point (arc extinction). However, with the increase of arc burning time, the axial state of the arc changes, so the cooling performance measured according to the simulated axial arc has differences with the actual test results, and the accuracy is low.

[0056] In order to solve the above problems, the embodiments of the present application provide a gas arc cooling performance detection method and related device. The gas arc cooling performance detection method and related device provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0057] Referring to Figure 1 , Figure 1 A system architecture diagram for implementing a gas arc cooling performance detection method is shown, which includes an arc extinguishing chamber, an arc burning information acquisition module and a data processing unit.

[0058] The arc extinguishing chamber is a device designed around the switch contact, and its core task is to limit the arc space position and accelerate the arc extinction, and to ensure the safe interruption of current during circuit breaking. In the embodiments of the present application, the arc extinguishing chamber includes a circuit breaker and a pre-charged test gas medium. Optionally, the test gas medium can also be filled on demand by means of real-time dynamic injection. The test gas medium can be any arc extinguishing medium in the above-mentioned replacement schemes, such as pure gas (such as CO2, N2, SF6), mixed gas (such as C4F7N / CO2, C5F 10 O / CO2, etc.).

[0059] The arc burning information collection module is configured to collect arc burning information of the circuit breaker in the arc extinguishing chamber in each breaking process, and transmit the arc burning information to the data processing unit. The data processing unit processes the arc burning information of each breaking process corresponding to each to-be-tested gas medium according to the arc cooling performance detection method of the gas described below, and determines the cooling performance of each to-be-tested gas medium.

[0060] Referring to Figure 2 , Figure 2 A flowchart of an arc cooling performance detection method of a gas provided by an embodiment of the present application is shown in FIG. 1. The arc cooling performance detection method of the gas provided by the embodiment of the present application can include steps S110 to S140, which are described in detail below. Figure 2

[0061] Step S110: At an arc burning time point in a preset arc burning interval corresponding to each to-be-tested gas medium, the circuit breaker is controlled to break, and arc burning information corresponding to each arc burning time point is obtained.

[0062] The arc burning information at least includes a voltage signal and a current signal between the breaking points of the circuit breaker in an arc burning duration represented by the arc burning time point. The preset arc burning interval is limited by a minimum arc burning duration and a maximum arc burning duration.

[0063] The arc burning duration refers to a time period during which an arc is generated between electrodes and continuously conducts electricity in the breaking process of the switch, that is, from a time point at which the arc is broken down to a time point at which the current is zero and the arc is completely extinguished. The minimum arc burning duration refers to the shortest time that can ensure stable arc burning and complete necessary physical processes under specific circuit conditions, circuit breaker characteristics, and gas medium environment. The maximum arc burning duration refers to the longest time that the arc continuously burns in the current breaking experiment of the circuit breaker under the same conditions as the minimum arc burning duration.

[0064] In the preset arc burning interval limited by the minimum arc burning duration and the maximum arc burning duration, the circuit breaker is broken at different arc burning time points. It can be understood that each arc burning time point in the preset arc burning interval actually represents an arc burning duration. For example, the preset arc burning interval is [10 ms, 20 ms], in which 10 ms, 20 ms, and time points between them all represent an arc burning duration, that is, an arc burning duration of 10 ms or 20 ms. Controlling the circuit breaker to break at the arc burning time point means that the circuit breaker is controlled to break and the arc burning duration after breaking is the arc burning duration represented by the arc burning time point.

[0065] ​Based on this, a plurality of arc time points are selected in the preset arc interval, and in order to make the detected arc information cover the axial arc and the distorted arc characteristic information, the arc time points should be selected in the short arc (shortest arc length) neighborhood and the long arc (longest arc length) neighborhood. For example, from the shortest arc time to the longest arc time, an arc time point is determined every time interval, such as 1ms, and the current breaking experiment is carried out at each arc time point. Based on this, the detection of arc characteristics under different arc lengths (short arc, long arc) can be realized, and the detection of distorted arcs can be comprehensively covered.

[0066] Subsequently, under each to-be-detected gas medium environment, after the circuit breaker is controlled to break at each arc time point, the arc information in the breaking process corresponding to each arc time point is obtained, and the arc information at least covers the key information such as the voltage, current and temperature of the arc between the breaking points of the circuit breaker within the arc length represented by the arc time point, thereby providing key data for subsequent research and analysis.

[0067] It can be understood that under the same gas medium, single breaking may cause accidental deviation of arc information due to random factors such as contact surface state and gas flow fluctuation, and multiple repeated experiments can obtain multiple groups of independent arc information, so as to eliminate random errors through statistics, improve the accuracy of the arc information, and thereby improve the reliability of the detection result of the cooling performance of the gas medium. Therefore, the embodiment of the present application performs multiple breaking experiments in the preset arc interval for each to-be-detected gas medium. Therefore, multiple breaking experiments, such as 3 times or more than 3 times, can be performed at each arc time point, and for each to-be-detected gas medium, the arc information corresponding to each breaking at each arc time point can be obtained.

[0068] In addition, in order to ensure that the gas medium is the only variable affecting the arc extinction in each breaking process, the operating parameters (such as voltage, current, contact opening distance, etc.) of the circuit breaker in all the above breaking experiments can be unified, so as to exclude the interference of other variables on the arc and ensure that the gas medium is the only variable affecting the arc extinction in all the breaking experiments.

[0069] In step S120, the voltage signal and the current signal between the breaking points of the circuit breaker in the arc information corresponding to each arc time point are used to determine the target constant corresponding to each arc time point, and the target constant represents the rate of the same multiple change of the arc resistance value.

[0070] According to the voltage signal and the current signal between the breaking points of the circuit breaker in the single breaking of the corresponding arc information at each arc time point, the arc resistance characteristics in the breaking process at the current arc time point are determined based on resistance calculation methods such as Ohm's law or differential resistance method. For example, a curve of the arc resistance changing over time is calculated, and the curve can reflect the dynamic process of the arc resistance recovering from a high-conductivity state (low resistance) to an insulation state (high resistance).

[0071] Further, based on the curve of the arc resistance changing over time, the rate of the same multiple of the change of the arc resistance value is quantified as a target constant, wherein the target constant can also be referred to as an arc cooling index (ACI) in the embodiments of the present application.

[0072] The target constant refers to the rate of the same multiple of the change of the arc resistance value, wherein the same multiple refers to the multiple of the change of the arc resistance under the breaking of other to-be-tested gas medium environments. In a possible implementation, the same multiple can also be pre-set to a target multiple, for example, the rate of the arc resistance change target multiple (such as 3 times) is taken as the target constant, so as to unify the multiple of the arc resistance change of all gas media.

[0073] Based on this, the change multiple of the arc resistance of different gas media is unified, it is ensured that the comparison is the performance of the gas medium under the same "cooling effect", the rate of the same multiple of the change is quantified, and the essence is to quantify the heat dissipation efficiency (cooling efficiency) of the gas medium. The faster the change rate of the arc resistance is, the more heat the gas medium takes away in the same time, and the stronger the cooling performance is.

[0074] If multiple breaking experiments are performed at each arc time point, a plurality of target constants corresponding to each arc time point can be obtained.

[0075] In step S120, the target constant corresponding to each arc time point is determined according to the pre-set arc interval of each to-be-tested gas medium.

[0076] In step S140, the constant cumulative value corresponding to each to-be-tested gas medium is compared to determine the arc cooling performance difference between the to-be-tested gas media.

[0077] After obtaining the target constant corresponding to each arc time point of each to-be-tested gas medium in step S120, the target constants of each arc time point in the pre-set arc interval are accumulated by, for example, integration, summation or the like, to obtain a constant cumulative value, so as to represent the cumulative strength of the cooling efficiency of the to-be-tested gas medium on the arc in the pre-set arc interval. In the embodiments of the present application, the constant cumulative value can also be referred to as a comprehensive arc cooling index (CACI).

[0078] It can be understood that the constant cumulative value is proportional to the arc cooling performance, that is, the greater the constant cumulative value, the stronger the cumulative strength of the cooling efficiency of the to-be-tested gas medium on the arc in the preset arc interval, and the stronger the arc cooling performance. Based on this, by comparing the constant cumulative values of the various to-be-tested gas media, the differences in the arc cooling performance between the to-be-tested gas media can be determined.

[0079] In summary, the method for detecting the arc cooling performance of a gas provided in the present application captures the arc information at different arc time points within the interval defined by the shortest arc duration and the longest arc duration of each to-be-tested gas medium, so as to cover the detection of the distorted arc. Further, according to the voltage signal and the current signal between the breaking points of the circuit breaker measured within the arc duration represented by each arc time point under the action of each to-be-tested gas medium, the arc resistance characteristic is extracted, and a target constant is quantified, which can represent the rate of the same multiple of the change in the arc resistance value. The transient cooling efficiency at a single arc time point is converted into a constant cumulative value representing the cumulative strength of the cooling in a preset time, which can reflect the cumulative strength of the cooling efficiency of the to-be-tested gas medium on the arc in the arc interval. The greater the constant cumulative value, the higher the cooling efficiency of the gas medium and the more complete the release of arc energy, thereby providing a high-sensitivity, full-dynamic quantitative evaluation standard for the selection of the medium of the circuit breaker.

[0080] Next, through the following embodiments, other possible implementations of the method for detecting the arc cooling performance of a gas provided in the embodiments of the present application are described.

[0081] In a possible implementation, the step S120 determines the target constant corresponding to each arc time point according to the voltage signal and the current signal between the breaking points of the circuit breaker in the arc information corresponding to each arc time point, including: determining, according to the voltage signal and the current signal between the breaking points of the circuit breaker in the arc information corresponding to each arc time point, the arc resistance values corresponding to a preset number of collection time points in the breaking process of the circuit breaker at each arc time point for each to-be-tested gas medium; fitting, based on the arc resistance values corresponding to the preset number of collection time points, an arc resistance curve function in the breaking process at each arc time point for each to-be-tested gas medium; determining, based on the arc resistance curve function in the breaking process at each arc time point for each to-be-tested gas medium, a characteristic time constant at each arc time point for each to-be-tested gas medium; and determining the reciprocal of the characteristic time constant at each arc time point for each to-be-tested gas medium as the target constant at each arc time point for each to-be-tested gas medium.

[0082] For each breaking experiment at each arcing time point, the arc resistance during the breaking process of the fracture is calculated using the arc voltage and current signals between the fracture. Alternatively, the arc resistance value at each sampling time point during the breaking process is determined by using the Ohm's law (R=U / I) or the differential resistance method (R=dU / dI) and other resistance calculation methods.

[0083] Subsequently, the arc resistance values at each sampling time point in each breaking experiment are fitted by using a preset mathematical fitting method, such as the least square method, the least mean square root method and the like, to obtain an arc resistance curve function of each breaking experiment, such as an equivalent arc resistance equation of the following formula (1), from which the characteristic time constant τ corresponding to each breaking experiment is determined.

[0084]

[0085] wherein R arc represents the equivalent arc resistance corresponding to t2, R1 and t1 represent the reference arc resistance and the corresponding sampling time point respectively, and τ is the characteristic time constant.

[0086] In the embodiments of the present application, the reciprocal 1 / τ of the characteristic time constant τ is taken as the target constant of the present breaking, and based on this, the target constant corresponding to each arcing time point of each to-be-tested gas medium can be calculated.

[0087] When multiple breaking experiments are performed at each arcing time point, 1 / τ corresponding to each breaking is obtained. In order to facilitate the calculation of the constant cumulative value in the subsequent process, the average value or other statistical value of 1 / τ of the multiple breaking experiments at one arcing time point is taken as the target constant of the arcing time point.

[0088] In a possible implementation, in step S130, the constant cumulative value is determined according to the target constant corresponding to each arcing time point in the preset arcing interval corresponding to each to-be-tested gas medium, including: integrating the target constant corresponding to the arcing time point of the preset arcing interval to obtain the constant cumulative value according to the target constant corresponding to each arcing time point in the preset arcing interval corresponding to each to-be-tested gas medium.

[0089] Each to-be-tested gas medium corresponds to the target constant of each arcing time point in the preset arcing interval. The preset arcing interval or the time interval in the preset arcing interval is taken as the integral interval, and the integral value of the target constant corresponding to each arcing time point in the integral interval is calculated according to the following formula (2) to obtain the constant cumulative value CACI of each to-be-tested gas medium.

[0090]

[0091] wherein, τ(t) represents a characteristic time constant corresponding to the arcing time point t, 1 / τ(t) represents a target constant corresponding to the arcing time point t, t max represents a longest arcing duration of the preset arcing interval, t min represents a shortest arcing duration of the preset arcing interval. If the integral interval is a time interval within the preset arcing interval, t max represents a maximum value of the time interval, t min represents a minimum value of the time interval.

[0092] In another possible implementation, in step S130, the constant cumulative value is determined according to the target constant corresponding to each arcing time point within the preset arcing interval corresponding to each to-be-detected gas medium, including: dividing the preset arcing interval corresponding to each to-be-detected gas medium into a preset number of time periods; determining a mean value of the target constant corresponding to the arcing time point included in each time period; multiplying the duration of each time period by the mean value of the target constant corresponding to the time period to obtain a product result of each time period; and summing up the product results of all time periods within the preset arcing interval corresponding to each to-be-detected gas medium to obtain the constant cumulative value corresponding to each to-be-detected gas medium.

[0093] The integral interval in the preset arcing interval is discretized into a plurality of small intervals, and then a geometric figure is used to approximately replace the area under the base function curve on each small interval, and finally the areas of all small intervals are added to obtain an approximate value of the integral. Alternatively, the integral interval in the preset arcing interval is discretized for calculation according to the following formula (3) to obtain the constant cumulative value CACI.

[0094]

[0095] wherein, n represents the total number of arcing time points in the determined integral interval in the preset arcing interval, represents the target constant corresponding to the i th arcing time point, t i represents the arcing duration of the i th arcing time point.

[0096] Referring to Figure 3 , an example diagram of the target constant variation curve provided by the embodiment of the present application, the discretization calculation can select the time interval of the adjacent two arcing time points in the preset arcing interval, that is, a time period determined by the two arcing time points, and the mean value of the target constant corresponding to the two arcing time points, that is, the constant cumulative value CACI i of the time period. Further, the constant cumulative values CACI iThe summation results in a constant cumulative value CACI of the preset arc burning interval. It can be understood that 1 / τ represents the arc burning time point, and the product of the strength of the arc extinguishing efficiency or arc decay ability of the to-be-tested gas medium and the time interval represents the total ability of the arc decay medium to decay the arc in the arc burning interval.

[0097] The preset arc burning interval can also be divided into a preset number of time intervals, such as 0.5 ms, 1 ms, and the like, by selecting a fixed time interval Δt. The CACI in the time interval Δt is calculated using the target constant corresponding to all arc burning time points in the time interval Δt and the time interval. That is, referring to the following formula (3), the target constant corresponding to each arc burning time point in the time interval Δt is calculated. Figure 4 Another example of a target constant change curve provided by the embodiments of the present application is shown in FIG. 2. In each time interval Δt, the target constant corresponding to each arc burning time point is included, that is, i wherein, represents the kth target constant in the time interval Δt. According to the product of the mean value of all target constants in the time interval Δt and the time interval, the constant cumulative value corresponding to the time interval is determined, that is, i i i The constant cumulative values calculated by all time intervals are finally summed up to obtain the constant cumulative value CACI corresponding to the preset arc burning interval. For details, refer to the following formula (4).

[0098]

[0099] wherein, m represents the total number of time intervals (time intervals) divided in the preset arc burning interval, and CACI i represents the constant cumulative value calculated by the ith time interval.

[0100] ​​​​In a possible implementation, the process of determining the shortest arcing duration and the longest arcing duration corresponding to the gas medium to be tested includes: under the action of the gas medium to be tested, a circuit breaker is controlled to perform opening according to a preset arcing critical value, the preset arcing critical value includes a preset shortest arcing duration and a preset longest arcing duration; it is determined whether the opening is successful; if the opening is successful, the preset arcing critical value is adjusted by a preset amplitude and a first adjustment direction corresponding to the preset arcing critical value, and the circuit breaker is controlled to perform opening according to the adjusted preset arcing critical value until the opening fails, and the arcing duration corresponding to the last opening before the opening fails is taken as an arcing duration critical value; the first adjustment direction corresponding to the preset shortest arcing duration is downward adjustment, and the first adjustment direction corresponding to the preset longest arcing duration is upward adjustment; if the opening fails, the preset arcing critical value is adjusted by a preset amplitude and a second adjustment direction corresponding to the preset arcing critical value, and the circuit breaker is controlled to perform opening according to the adjusted preset arcing critical value until the opening is successful, and the arcing duration when the opening is successful is taken as the arcing duration critical value; the second adjustment direction corresponding to the preset shortest arcing duration is upward adjustment, and the second adjustment direction corresponding to the preset longest arcing duration is downward adjustment.

[0101] Taking the process of determining the shortest arcing duration as an example, the following is described. When the circuit breaker is opened in the gas medium to be tested, first, a preset shortest arcing duration or an expected shortest arcing duration is initially set, and a starting benchmark of an experiment is established. The preset shortest arcing duration can be obtained based on theoretical calculation, empirical data or simple experiment in the early stage, and provides a starting point for subsequent gradual accurate finding of the shortest arcing duration. Further, the preset shortest arcing duration is used to control the execution of a single opening experiment, and the tested sample is subjected to current flow at the break, a recovery voltage is applied, and the voltage and current signals between the breaks in the opening process are recorded.

[0102] According to the recorded voltage and current signals between the breaks, it is determined whether the opening experiment corresponding to the preset shortest arcing duration is successful. If the opening experiment corresponding to the preset shortest arcing duration is successful, it indicates that the arc extinguishing medium can effectively extinguish the arc at the preset shortest arcing duration, and the circuit can be reliably opened. At this time, the preset shortest arcing duration is adjusted downward by a preset amplitude (for example, 1 ms), and the experiment is repeated with the adjusted preset shortest arcing duration. The purpose is to explore the opening capability of the arc extinguishing medium at a shorter arcing duration, and gradually approach the limit.

[0103] If the opening experiment corresponding to the preset shortest arcing duration fails, such as reignition, it means that the arc extinguishing medium cannot extinguish the arc in time at the current preset shortest arcing duration, resulting in reignition of the arc and failure of the circuit to be reliably opened. At this time, the preset shortest arcing duration is adjusted upward by a preset amplitude (for example, 1 ms), and the experiment is repeated with the adjusted preset shortest arcing duration. The purpose is to find an arcing duration range that can ensure successful opening, and avoid frequent reignition due to too short arcing duration.

[0104] The following example illustrates the process of finding the shortest arcing time. Set a desired shortest arcing time of 10 ms, control the first opening experiment, if the current is successfully disconnected within 10 ms, the expected zero crossing point, then reduce the actual arcing time of this opening (such as 9.5 ms) by 1 ms, and re-perform the opening experiment with 8.5 ms; if the opening fails, increase the actual arcing time of this opening (such as 9.5 ms) by 1 ms, and re-perform the opening experiment with 10.5. Until the opening results of the two adjacent arcing times are one success and one failure, at this time the longer arcing time of the two adjacent arcing times is considered as the shortest arcing time.

[0105] The determination process of the longest arcing time is the same. Initially set a longest arcing time / desired longest arcing time, establish a starting benchmark for the experiment, and similarly, the preset longest arcing time can be obtained based on theoretical calculation, empirical data or preliminary simple experiment, providing a starting point for subsequent gradual accurate finding of the longest arcing time. Further, perform a single opening experiment with the preset longest arcing time, pass current through the fracture of the test sample, apply recovery voltage, and record the voltage and current signals between the fracture during the opening process.

[0106] According to the recorded voltage and current signals between the fracture, determine whether the opening experiment corresponding to the preset shortest arcing time is successful. If the test corresponding to the preset longest arcing time is successful, it indicates that the gas medium to be tested can effectively extinguish the arc within the preset longest arcing time, allowing the circuit to be reliably opened. At this time, increase the preset arcing time by 1 ms and continue the experiment, the purpose is to explore the opening ability boundary of the arc extinguishing medium under longer time, further tap its performance potential, and gradually approach the longest arcing time limit that can stably open.

[0107] If the test corresponding to the preset longest arcing time fails, it means that the gas medium cannot effectively extinguish the arc under the current preset longest arcing time, leading to arc reignition and unsuccessful opening of the circuit. At this time, decrease the preset longest arcing time by 1 ms and continue the experiment, in order to return to an arcing time range that can ensure successful opening, avoid frequent reignition due to too long arcing time, and gradually narrow the range of finding the longest arcing time.

[0108] Based on this, re-perform the opening based on the adjusted preset longest arcing time until two adjacent arcing times are found, and the opening results of the two arcing times are opposite, then the arcing time with successful opening is considered as the longest arcing time.

[0109] In summary, the embodiment of the present application provides a kind of arc cooling performance detection method of gas, by current breaking experiment, the arc voltage and current signal between the fracture are collected, arc resistance is calculated, and the equivalent arc resistance curve closest to experiment is fitted, so that the characteristic time constant τ of the burning time point corresponding to this time breaking and target constant 1 / τ.

[0110] In the interval defined by the shortest burning time length and the longest burning time length, multiple time intervals are divided, multiple sets of repeated experiments are carried out, the target constant 1 / τ or the characteristic time constant τ in each time interval is extracted, time integration is carried out, and finally the comprehensive arc cooling factor CACI (Comprehensive Arc Cooling Index) of each to-be-detected gas medium in the interval is calculated, i.e. the constant cumulative value in the embodiment of the present application, so that the detection and evaluation of multiple to-be-detected gas media are realized.

[0111] The embodiment of the present application considers the influence of different burning time lengths on arc cooling effect, which is reflected in the energy dissipation efficiency in the whole burning interval and the whole burning process. Moreover, the arc cooling effect of gas medium is quantified as a calculation value, which quantitatively detects and evaluates the arc cooling performance of different gas media, unifies the evaluation standard, and facilitates the comparison between different gas media.

[0112] The above introduces a kind of arc cooling performance detection method of gas provided by the embodiment of the present application, and the device for executing the arc cooling performance detection method of gas described above will be introduced below.

[0113] Please refer to Figure 5 , Figure 5 It is a structure schematic view of the arc cooling performance detection device of gas provided by the embodiment of the present application. As Figure 5 shown, it includes:

[0114] Breaking control unit 100 is used to control the breaker to break at the burning time point in the preset burning interval corresponding to each to-be-detected gas medium, obtain the burning information corresponding to each burning time point, and the burning information at least includes: the voltage signal and current signal between the fracture of the breaker within the burning time length represented by the burning time point; The preset burning interval is limited by the shortest burning time length and the longest burning time length;

[0115] Constant determination unit 200 is used to determine the target constant corresponding to each burning time point according to the voltage signal and current signal between the fracture of the breaker in the burning information corresponding to each burning time point, and the target constant represents the rate of the same multiple of arc resistance change;

[0116] The constant accumulation unit 300 is configured to determine a constant accumulation value according to the target constant corresponding to each of the arc time points in the preset arc interval corresponding to each of the gas media to be detected.

[0117] The performance comparison unit 400 is configured to compare the constant accumulation values corresponding to each of the gas media to be detected to determine the arc cooling performance difference between the gas media to be detected.

[0118] In a possible implementation, the constant accumulation unit 300 can determine the constant accumulation value according to the target constant corresponding to each of the arc time points in the preset arc interval corresponding to each of the gas media to be detected, and the process can include: integrating the target constant corresponding to each of the arc time points in the preset arc interval corresponding to each of the gas media to be detected to obtain the constant accumulation value.

[0119] In a possible implementation, the constant accumulation unit 300 can determine the constant accumulation value according to the target constant corresponding to each of the arc time points in the preset arc interval corresponding to each of the gas media to be detected, and the process can include: dividing the preset arc interval corresponding to each of the gas media to be detected into a preset number of time periods; determining the average of the target constant corresponding to each of the arc time points in each of the time periods; multiplying the time length of each of the time periods by the average of the target constant corresponding to each of the time periods to obtain a product result of each of the time periods; and summing the product results of all the time periods in the preset arc interval corresponding to each of the gas media to be detected to obtain the constant accumulation value corresponding to each of the gas media to be detected.

[0120] In a possible implementation, the constant determination unit 200 can include:

[0121] The resistance determination subunit is configured to determine, according to the voltage signal and the current signal between the breaking points of the circuit breaker in the arc information corresponding to each of the arc time points, the arc resistance value corresponding to a preset number of collection time points in the breaking process of the circuit breaker at each of the arc time points corresponding to each of the gas media to be detected.

[0122] The curve fitting subunit is configured to fit the arc resistance curve function corresponding to each of the gas media to be detected in the breaking process at each of the arc time points based on the arc resistance values corresponding to the preset number of collection time points.

[0123] a characteristic time constant determination subunit configured to determine a characteristic time constant of each of the gas media to be tested at each of the arc burning time points based on the arc resistance curve function of each of the gas media to be tested during the breaking process at each of the arc burning time points;

[0124] a target constant determination subunit configured to determine an inverse of the characteristic time constant of each of the gas media to be tested at each of the arc burning time points as a target constant of each of the gas media to be tested at each of the arc burning time points.

[0125] In a possible implementation, the breaking control unit 100 determines the shortest arc burning time length and the longest arc burning time length of the gas media to be tested by:

[0126] The circuit breaker is controlled to break under the action of the gas media to be tested according to a preset arc burning critical value, and the preset arc burning critical value includes a preset shortest arc burning time length and a preset longest arc burning time length.

[0127] It is determined whether the breaking is successful.

[0128] If the breaking is successful, the preset arc burning critical value is adjusted by a preset amplitude and a first adjustment direction corresponding to the preset arc burning critical value, and the circuit breaker is controlled to break according to the adjusted preset arc burning critical value until the breaking fails, and an arc burning time length corresponding to the last breaking before the breaking fails is taken as an arc burning time length critical value; the first adjustment direction corresponding to the preset shortest arc burning time length is downward adjustment, and the first adjustment direction corresponding to the preset longest arc burning time length is upward adjustment.

[0129] If the breaking fails, the preset arc burning critical value is adjusted by a preset amplitude and a second adjustment direction corresponding to the preset arc burning critical value, and the circuit breaker is controlled to break according to the adjusted preset arc burning critical value until the breaking is successful, and an arc burning time length when the breaking is successful is taken as an arc burning time length critical value; the second adjustment direction corresponding to the preset shortest arc burning time length is upward adjustment, and the second adjustment direction corresponding to the preset longest arc burning time length is downward adjustment.

[0130] In summary, the application captures the arc information at different arc time points within the interval defined by the shortest arc burning duration and the longest arc burning duration of each to-be-tested gas medium, so as to cover the detection of the distorted arc. Further, according to the voltage signal and the current signal between the breaking points of the circuit breaker measured within the arc burning duration represented by each arc time point under the action of each to-be-tested gas medium, the arc resistance characteristic is extracted, and a target constant is quantified, which can represent the rate of the same multiple change of the arc resistance value. The transient cooling efficiency at a single arc time point is converted into a constant cumulative value representing the cooling cumulative strength within a preset time, which can reflect the cumulative strength of the cooling efficiency of the to-be-tested gas medium on the arc in the arc interval. The greater the constant cumulative value, the higher the cooling efficiency of the gas medium and the more complete the arc energy release, thereby providing a high-sensitivity, full-dynamic quantitative evaluation standard for the medium selection of the circuit breaker.

[0131] The embodiment of the application further provides an electronic device. Referring to Figure 6 Fig. 1 shows a structural schematic diagram of an electronic device suitable for implementing the electronic device in the embodiment of the application. The electronic device in the embodiment of the application can include but is not limited to a fixed terminal such as a mobile phone, a notebook computer, a PDA (Personal Digital Assistant), a PAD (Tablet Personal Computer), a desktop computer, and the like. Figure 6 The electronic device shown is only an example and should not bring any limitation to the functions and use range of the embodiment of the application.

[0132] As shown in Figure 6 The electronic device can include a processing device (for example, a central processing unit, a graphics processing unit, etc.) 601, which can perform various appropriate actions and processes according to programs stored in a read-only memory (ROM) 602 or loaded into a random access memory (RAM) 603 from a storage device 608. In the state that the electronic device is powered on, various programs and data required for the operation of the electronic device are also stored in the RAM 603. The processing device 601, the ROM 602, and the RAM 603 are connected to each other through a bus 604. An input / output (I / O) interface 605 is also connected to the bus 604.

[0133] Generally, the following devices can be connected to the I / O interface 605: an input device 606 including, for example, a touch screen, a touchpad, a keyboard, a mouse, a camera, a microphone, an accelerometer, a gyroscope, etc.; an output device 607 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; a storage device 608 including, for example, a memory card, a hard disk, etc.; and a communication device 609. The communication device 609 can allow the electronic device to communicate with other devices wirelessly or by wire to exchange data. Although Figure 6Electronic devices having various apparatuses are shown, but it should be understood that not all of the illustrated apparatuses are required to implement or be present in a particular implementation. More or fewer apparatuses can alternatively be implemented or present.

[0134] The embodiment of the present application further provides a computer program product comprising computer readable instructions, which, when executed on an electronic device, cause the electronic device to implement any of the arc cooling performance detection methods for gases provided by the embodiments of the present application.

[0135] The embodiment of the present application further provides a computer readable storage medium, which carries one or more computer programs, which, when executed by an electronic device, can cause the electronic device to implement any of the arc cooling performance detection methods for gases provided by the embodiments of the present application.

[0136] In addition, it should be noted that the apparatus embodiments described above are merely illustrative, and the units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, i.e., they can be located in one place or distributed on multiple network units. Part or all of the modules can be selected according to actual needs to achieve the purpose of the embodiments. In addition, the connection relationship between the modules in the apparatus embodiments provided by the present application indicates that there is a communication connection between them, which can be implemented as one or more communication buses or signal lines.

[0137] From the above description of the embodiments, those skilled in the art can clearly understand that the present application can be implemented by means of software and necessary general hardware, and of course, it can also be implemented by special hardware including special integrated circuits, special CPUs, special memories, special components, etc. Generally, functions completed by computer programs can be easily implemented by corresponding hardware, and specific hardware structures for implementing the same function can also be various, such as analog circuits, digital circuits or special circuits. However, for the present application, software program implementation is a better embodiment. Based on this understanding, the technical solutions of the present application can be embodied in the form of a software product, which is stored in a readable storage medium, such as a computer's floppy disk, U disk, mobile hard disk, ROM, RAM, magnetic disk or optical disk, etc., including a plurality of instructions to make a computer device (which can be a personal computer, training device, or network device, etc.) execute the methods described in various embodiments of the present application.

[0138] In the above embodiments, the implementation can be wholly or partially by software, hardware, firmware, or any combination thereof. When implemented by software, the implementation can be wholly or partially in the form of a computer program product.

[0139] The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are wholly or partially generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another, for example, the computer instructions can be transmitted from one website, computer, training device or data center to another website, computer, training device or data center through wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that a computer can store or a data storage device such as a training device, a data center, etc. integrated with one or more available media. The available medium can be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (SSD)), etc.

Claims

1. A method for testing the arc cooling performance of a gas, characterized in that, include: At each arcing time point within a preset arcing interval corresponding to the gas medium to be tested, the circuit breaker is controlled to open, and arcing information corresponding to each arcing time point is obtained. The arcing information includes at least the voltage and current signals between the contacts of the circuit breaker within the arcing duration represented by the arcing time point. The preset arcing interval is determined by the shortest arcing duration and the longest arcing duration. Based on the voltage and current signals between the circuit breaker contacts in the arc information corresponding to each arc time point, a target constant corresponding to each arc time point is determined. The target constant represents the rate at which the arc resistance value changes by the same multiple. Based on the target constant corresponding to each arcing time point within the preset arcing interval corresponding to each of the gas media to be tested, the cumulative value of the constant is determined; By comparing the cumulative constant values ​​corresponding to each of the gas media under test, the differences in arc cooling performance among the gas media under test are determined.

2. The method for detecting the arc cooling performance of a gas according to claim 1, characterized in that, The step of determining the cumulative value of the constant based on the target constant corresponding to each arcing time point within the preset arcing interval corresponding to each of the tested gas media includes: Based on the target constant corresponding to each arcing time point within the preset arcing interval corresponding to each of the gas media to be tested, the target constant corresponding to the arcing time point within the preset arcing interval is integrated to obtain the cumulative value of the constant.

3. The method for detecting the arc cooling performance of a gas according to claim 1, characterized in that, The step of determining the cumulative value of the constant based on the target constant corresponding to each arcing time point within the preset arcing interval corresponding to each of the tested gas media includes: The preset arcing interval corresponding to each of the gas media to be tested is divided into a preset number of time periods; Determine the mean value of the target constant corresponding to the arcing time points contained in each of the aforementioned time periods; Multiply the duration of each time period by the mean of its corresponding target constant to obtain the product result of each time period; The cumulative constant value corresponding to each gas medium to be tested is obtained by summing the product results of all time periods within the preset arcing interval corresponding to each gas medium to be tested.

4. The method for detecting the arc cooling performance of a gas according to claim 1, characterized in that, The step of determining the target constant corresponding to each arcing time point based on the voltage and current signals between the circuit breaker contacts in the arcing information corresponding to each arcing time point includes: Based on the arc information corresponding to each arc time point, the voltage and current signals between the circuit breaker contacts are used to determine the arc resistance value corresponding to a preset number of acquisition time points during the opening and closing process of the circuit breaker at each arc time point for each gas medium to be tested. Based on the arc resistance values ​​corresponding to the preset number of acquisition time points, an arc resistance curve function corresponding to each of the gas media under test is obtained during the opening and closing process of each arcing time point. Based on the arc resistance curve function of each gas medium under test during the opening process at each arcing time point, the characteristic time constant of each gas medium under test at each arcing time point is determined. The reciprocal of the characteristic time constant corresponding to each of the gas media to be tested at each of the arcing time points is determined, which is the target constant corresponding to each of the gas media to be tested at each of the arcing time points.

5. The method for testing the arc cooling performance of a gas according to any one of claims 1-4, characterized in that, The process of determining the shortest and longest arc durations corresponding to the gas medium to be tested includes: Under the action of the gas medium to be tested, the circuit breaker is controlled to break according to the preset arcing critical value. The preset arcing critical value includes: the preset shortest arcing time and the preset longest arcing time. Determine whether the interruption was successful; If the interruption is successful, the preset arcing critical value is adjusted according to the preset amplitude and the first adjustment direction corresponding to the preset arcing critical value, and the circuit breaker is controlled to interrupt according to the adjusted preset arcing critical value until the interruption fails. The arcing duration corresponding to the previous interruption failure is taken as the arcing duration critical value. The first adjustment direction corresponding to the preset shortest arcing duration is downward, and the first adjustment direction corresponding to the preset longest arcing duration is upward. If the interruption fails, the preset arcing critical value is adjusted according to the preset amplitude and the second adjustment direction corresponding to the preset arcing critical value, and the circuit breaker is controlled to interrupt according to the adjusted preset arcing critical value until the interruption is successful. The arcing duration at the time of successful interruption is taken as the arcing duration critical value. The second adjustment direction corresponding to the preset shortest arcing duration is upward, and the second adjustment direction corresponding to the preset longest arcing duration is downward.

6. A gas arc cooling performance testing system, characterized in that, include: Arc extinguishing chamber, arc information acquisition module, and data processing unit; The arc-extinguishing chamber includes a circuit breaker and a pre-charged gas medium to be tested; The arc information acquisition module is used to collect arc information of the circuit breaker in the arc extinguishing chamber during each opening process; The data processing unit is used to implement the gas arc cooling performance detection method as described in any one of claims 1 to 5.

7. A device for testing the arc cooling performance of a gas, characterized in that, include: The interruption control unit is used to control the circuit breaker to interrupt the arc at the arc time point within the preset arc interval corresponding to each gas medium to be tested, and to obtain the arc information corresponding to each arc time point. The arc information includes at least the voltage signal and current signal between the contacts of the circuit breaker within the arc duration represented by the arc time point. The preset arc interval is determined by the shortest arc duration and the longest arc duration. A constant determination unit is used to determine a target constant corresponding to each arcing time point based on the voltage and current signals between the circuit breaker contacts in the arcing information corresponding to each arcing time point. The target constant represents the rate at which the arc resistance value changes by the same multiple. The constant accumulation unit is used to determine the constant accumulation value based on the target constant corresponding to each arcing time point within the preset arcing interval corresponding to each of the gas media to be tested. The performance comparison unit is used to compare the cumulative value of the constant corresponding to each of the gas media under test, and to determine the difference in arc cooling performance between the gas media under test.

8. A computer program product, characterized in that, It includes computer-readable instructions that, when executed on an electronic device, cause the electronic device to implement the gas arc cooling performance testing method as described in any one of claims 1 to 5.

9. An electronic device, characterized in that, It includes at least one processor and a memory connected to the processor, wherein: The memory is used to store computer programs; The processor is used to execute the computer program to enable the electronic device to implement the gas arc cooling performance detection method as described in any one of claims 1 to 5.

10. A computer storage medium, characterized in that, The storage medium carries one or more computer programs that, when executed by an electronic device, enable the electronic device to implement the gas arc cooling performance testing method as described in any one of claims 1 to 5.

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