CN115993556A - A method for checking the short-circuit resistance capability of a transformer and related equipment - Google Patents

Abstract

The embodiment of the invention discloses a method for checking the short-circuit resistance of a transformer and related equipment, wherein the method comprises the following steps: collecting fault wave recording data, oil surface temperature data and basic data of a target transformer; determining the target yield strength of the lead in the target transformer according to the fault wave recording data and the oil surface temperature data; constructing a physical structure model of the target transformer based on the basic data, and calculating a target short-circuit force of the target transformer; and checking the short-circuit resistance of the target transformer according to the target short-circuit force and the target yield strength. And calculating the temperature rise condition of the lead according to the short-circuit current of the transformer in line faults, further determining the mechanical characteristic change condition of the lead in the target transformer, checking the short-circuit resistance of the transformer, grasping the reclosing impact resistance of the transformer after short-circuit impact, and realizing accurate construction.

Description

A method for verifying transformer short-circuit resistance and related equipment

Technical Field

The present invention relates to the technical field of power transmission line maintenance, and in particular to a method for calibrating transformer short-circuit resistance capability and related equipment.

Background Art

In actual power grid operation, there are many cases where transformers are damaged when line reclosing devices have permanent faults. However, the existing short-circuit resistance verification work is carried out using the manufacturer's design structure parameters, mainly in an offline form, without considering the impact of thermal effects after line faults on the short-circuit resistance of reclosing devices during permanent faults, resulting in inaccurate verification.

Summary of the invention

In view of this, the embodiment of the present application provides a transformer short-circuit resistance verification method and related equipment, which are used to solve the problem that the prior art does not consider the impact of thermal effects after line faults on the short-circuit resistance of the reclosing switch during permanent faults. In order to achieve one or part or all of the above purposes or other purposes, the present application proposes a transformer short-circuit resistance verification method, including:

Acquire fault recording data, oil level temperature data and basic data of the target transformer, wherein the fault recording data includes fault current data flowing through the target transformer when a circuit where the target transformer is located fails;

Determine the target yield strength of the conductor in the target transformer based on the fault current data and the oil surface temperature data;

Constructing a physical structure model of the target transformer based on the basic data, and obtaining a target short-circuit force of the target transformer;

The short-circuit resistance capability of the target transformer is checked according to the target short-circuit force and the target yield strength.

Optionally, before the step of determining the target yield strength of the conductor in the target transformer based on the fault current data and the oil surface temperature data, the method further includes:

Acquire the property information of the wire in the target transformer, wherein the factory information includes manufacturer information, model information, service life information and environment information;

Selecting a target conductor based on attribute information of the conductor in the target transformer;

Performing yield strength tests at different temperatures on the target conductor to obtain a yield strength table of the target conductor;

The yield table of the target conductor is used as the target yield table of the conductor in the target transformer.

Optionally, the step of determining the target yield strength of the conductor in the target transformer based on the fault current data and the oil surface temperature data includes:

Determine a target temperature of the conductor in the target transformer based on the fault current data and the oil level temperature data;

The target yield strength of the conductor in the target transformer is determined according to the target temperature and the target yield strength table.

Optionally, the step of constructing the physical structure model of the target transformer based on the basic data includes:

A physical structure model of the target transformer is established according to the structural parameters of the coil, the core and the tap switch of the target transformer.

Optionally, the step of obtaining a target short-circuit force of the target transformer includes:

Calculating the leakage magnetic field based on the physical structure model, and obtaining the radial force of each wire in each turn of the wire in the target transformer;

A target short-circuit force of the target transformer is determined according to the radial force.

Optionally, the step of determining a target short-circuit force of the target transformer according to the radial force includes:

Determine the average annular tensile short-circuit force of continuous, spiral and multi-layer windings and the average annular compressive short-circuit force of continuous, spiral and layer windings based on the radial force of each conductor on the continuous, spiral and layer windings;

Determine the radial bending short-circuit force of the conductor in the span between the stays or the spacers according to the radial force of the conductor in the span between the stays or the spacers;

Determine the axial bending short-circuit force of the conductor in the span between the radial spacers according to the radial force of the conductor in the span between the radial spacers;

Determine the maximum axial compressive force acting on each entity winding according to the maximum axial force on each entity winding;

The average annular tensile short-circuit force, the average annular compressive short-circuit force, the conductor radial bending short-circuit force, the conductor axial bending short-circuit force and the maximum axial compressive force are used as the target short-circuit force of the target transformer.

Optionally, the step of verifying the short-circuit resistance capability of the target transformer according to the target short-circuit force and the target yield strength includes:

Multiplying the target yield strength by a preset coefficient to obtain a criterion for the target short-circuit force;

The criterion is matched with the target short-circuit force to obtain the short-circuit resistance capability of the target transformer.

On the other hand, the present application provides a transformer short-circuit resistance verification device, comprising:

A data acquisition module, used to obtain fault recording data, oil surface temperature data and basic data of the target transformer, wherein the fault recording data includes fault current data flowing through the target transformer when a circuit in which the target transformer is located fails;

A determination module, configured to determine a target yield strength of a conductor in the target transformer based on the fault current data and the oil surface temperature data;

A calculation module, used to construct a physical structure model of the target transformer based on the basic data, and obtain a target short-circuit force of the target transformer;

A judgment module is used to check the short-circuit resistance capability of the target transformer according to the target short-circuit force and the target yield strength.

On the other hand, an embodiment of the present application provides an electronic device, comprising: a processor, a memory and a bus, wherein the memory stores machine-readable instructions executable by the processor, and when the electronic device is running, the processor and the memory communicate through the bus, and when the machine-readable instructions are executed by the processor, the steps of the transformer short-circuit resistance calibration method as described above are performed.

On the other hand, an embodiment of the present application provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the transformer short-circuit resistance verification method as described above are executed.

Implementing the embodiments of the present invention will have the following beneficial effects:

By acquiring the fault recording data, oil surface temperature data and basic data of the target transformer, the fault recording data includes the fault current data flowing through the target transformer when the circuit where the target transformer is located fails; determining the target yield strength of the conductor in the target transformer based on the fault current data and the oil surface temperature data; constructing the physical structure model of the target transformer based on the basic data, and obtaining the target short-circuit force of the target transformer; and verifying the short-circuit resistance of the target transformer according to the target short-circuit force and the target yield strength. The real-time verification of the transformer's short-circuit resistance is achieved, and the transformer's ability to withstand the reclosing shock again after the short-circuit shock is grasped in real time, and precise policy implementation is achieved, which can reduce the loss of manpower, material resources, etc. caused by power outages, and can also avoid the power grid operation risks caused by power outages, and improve the power supply reliability of the power grid.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

in:

FIG1 is a flow chart of a method for verifying the short-circuit resistance of a transformer provided in an embodiment of the present application;

FIG2 is a schematic diagram of the structure of a transformer short-circuit resistance verification device provided in an embodiment of the present application;

FIG3 is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application;

FIG. 4 is a schematic diagram of the structure of a storage medium provided in an embodiment of the present application.

DETAILED DESCRIPTION

The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

The present application proposes a method for verifying the short-circuit resistance of a transformer, as shown in FIG1 , comprising:

S101, acquiring fault recording data, oil level temperature data and basic data of a target transformer, wherein the fault recording data includes fault current data flowing through the target transformer when a circuit where the target transformer is located fails;

Exemplarily, the system is connected to the substation OCS system to obtain the fault recording data, oil surface temperature data and basic data of the target transformer in real time, wherein the fault recording data includes the fault current data flowing through the target transformer when the circuit where the target transformer is located fails;

S102, determining a target yield strength of the conductor in the target transformer based on the fault current data and the oil surface temperature data;

Exemplarily, considering that temperature change will lead to change in conductor performance, a target yield strength of the conductor in the target transformer is determined based on the fault current data and the oil surface temperature data;

S103, constructing a physical structure model of the target transformer based on the basic data, and obtaining a target short-circuit force of the target transformer;

Exemplarily, a physical structure model of the target transformer is constructed based on the basic data, such as the number of turns of the winding, the length of the wire, the actual height of the winding, and the like, and leakage magnetic field calculation and short-circuit force calculation are performed based on the physical structure model;

S104. Checking the short-circuit resistance capability of the target transformer according to the target short-circuit force and the target yield strength.

By acquiring the fault recording data, oil surface temperature data and basic data of the target transformer, the fault recording data includes the fault current data flowing through the target transformer when the circuit where the target transformer is located fails; determining the target yield strength of the conductor in the target transformer based on the fault current data and the oil surface temperature data; constructing the physical structure model of the target transformer based on the basic data, and obtaining the target short-circuit force of the target transformer; and verifying the short-circuit resistance of the target transformer according to the target short-circuit force and the target yield strength. The short-circuit resistance of the transformer is calculated in real time according to the oil temperature changes, so that the short-circuit resistance of the transformer can be verified in real time, and the short-circuit resistance of the transformer can be mastered in real time, so as to take measures to prevent and control transformer damage. Real-time mastery of the short-circuit resistance of the transformer and implementation of precise policies can reduce the loss of manpower, material resources and other resources caused by power outages, avoid the risk of power grid operation caused by power outages, and improve the power supply reliability of the power grid.

In a possible implementation manner, before the step of determining the target yield strength of the conductor in the target transformer based on the fault current data and the oil surface temperature data, the step further includes:

Acquire the property information of the wire in the target transformer, wherein the factory information includes manufacturer information, model information, service life information and environment information;

Selecting a target conductor based on attribute information of the conductor in the target transformer;

Performing yield strength tests at different temperatures on the target conductor to obtain a yield strength table of the target conductor;

The yield table of the target conductor is used as the target yield table of the conductor in the target transformer.

Exemplarily, a wire of the same manufacturer, the same model, used for the same time, and in the same working environment as the target transformer is used as the target wire, so that the target wire is infinitely close to the wire in the target transformer, thereby ensuring that the yield strength curve of the wire in the target transformer is obtained without going offline, that is, the yield strength table, as shown in Table 1:

Table 1 Yield strength of target conductors versus temperature curve

Temperature, °C 20 100 200 250 R _p0.2 ，MPa 98 85 74 69

In a possible implementation manner, the step of determining the target yield strength of the conductor in the target transformer based on the fault current data and the oil surface temperature data includes:

Determine a target temperature of the conductor in the target transformer based on the fault current data and the oil level temperature data;

The target yield strength of the conductor in the target transformer is determined according to the target temperature and the target yield strength table.

Exemplarily, the average temperature _θ1 after the winding is short-circuited should be calculated by the average temperature formula:

Where:

θ ₁ --- Average temperature of the winding after short circuit t(s), in degrees Celsius (℃);

θ ₀ --- Winding starting temperature, in degrees Celsius (℃);

J-----Short-circuit current density, in amperes per square millimeter (A/mm), calculated according to the root mean square value of the symmetrical short-circuit current;

t--Duration, in seconds (s).

Among them, the above two average temperature formulas are derived under adiabatic conditions and are only valid when the short circuit duration does not exceed 10s. The coefficients in the formula are the specific heat, density and resistivity of different materials under 100℃ conditions.

Determine the target temperature of the conductor in the target transformer according to the average temperature formula; determine the target yield strength of the conductor in the target transformer according to the target temperature and the target yield strength table

In a possible implementation, the step of constructing the physical structure model of the target transformer based on the basic data includes:

A physical structure model of the target transformer is established according to the structural parameters of the coil, the core and the tap switch of the target transformer.

In a possible implementation manner, the step of obtaining the target short-circuit force of the target transformer includes:

Calculating the leakage magnetic field based on the physical structure model, and obtaining the radial force of each wire in each turn of the wire in the target transformer;

A target short-circuit force of the target transformer is determined according to the radial force.

In a possible implementation manner, the step of determining the target short-circuit force of the target transformer according to the radial force includes:

Determine the average annular tensile short-circuit force of continuous, spiral and multi-layer windings and the average annular compressive short-circuit force of continuous, spiral and layer windings based on the radial force of each conductor on the continuous, spiral and layer windings;

Determine the radial bending short-circuit force of the conductor in the span between the stays or the spacers according to the radial force of the conductor in the span between the stays or the spacers;

Determine the axial bending short-circuit force of the conductor in the span between the radial spacers according to the radial force of the conductor in the span between the radial spacers;

Determine the maximum axial compressive force acting on each entity winding according to the maximum axial force on each entity winding;

The average annular tensile short-circuit force σ _t , the average annular compressive short-circuit force σ _c , the conductor radial bending short-circuit force σ _br , the conductor axial bending short-circuit force σ _fa and the maximum axial compressive force _Fa are used as target short-circuit forces of the target transformer.

Exemplarily, a physical structure model of the transformer is established according to the structural parameters of the transformer coil, core, and tap changer, and leakage magnetic field calculation and short-circuit force calculation are performed. The calculation method is as follows:

F＝BILW (3-1)

Where B is the magnetic flux density perpendicular to the conductor, T;

I----current in the wire, A;

L---the length of the wire, m

W---Number of turns of winding

According to the above formula, the radial electromagnetic force should be calculated according to formula (3-2):

_Fx ＝BpjIdmaxLpj*W (3-2)

Where Bpj is the average density of the longitudinal leakage magnetic field, T.

Where: ρ--Rockwell coefficient

H---actual height of winding, m;

HK- reactance height of winding, m;

Idmax--maximum short-circuit current amplitude (i.e. impulse short-circuit current value ich), A;

Lpj---average circumference of each turn of wire, m;

W--Rated number of turns per phase of the winding, the number of turns when the tap is in the middle position.

Dpj--The diameter of the center line of the oil channel between the primary and secondary windings, πDpj is the average circumference of the high and low voltage windings. _{μ 0} = 0.4*π*10 ^-6 H/m

Uk:---short circuit impedance, unit is %

m---wire branch, that is, when there are m wires connected in parallel to form a turn of wire, there are m wires in one turn. Therefore, the formula can be changed to:

Since the maximum short-circuit current is approximately calculated as:

Where Kch is the impact coefficient, U _k % is the impedance voltage percentage, so the calculation formula of Fx is:

When each turn of wire has m branches, the Fx of each wire is (this is for each):

Under the action of the radial force determined by the above formula, the high-voltage winding (external winding) will be subjected to a large tension, so the tensile stress calculation should be performed on the external winding. According to the principle of mechanics, under the action of the radial force Fx, the tangential tension generated in the winding is:

For concentric windings, the calculated values of tensile stress σ _x for each root and each turn are equal.

In a possible implementation manner, the step of verifying the short-circuit resistance capability of the target transformer according to the target short-circuit force and the target yield strength includes:

Multiplying the target yield strength by a preset coefficient to obtain a criterion for the target short-circuit force;

The criterion is matched with the target short-circuit force to obtain the short-circuit resistance capability of the target transformer.

Exemplarily, according to the criteria in GB/T 1094.5-2008, as shown in Table 2, the preset coefficients are 0.9, 0.35, 0.6, etc., the target yield strength is R _p0.2 , and the criteria for each short-circuit force related to the winding short-circuit resistance at the oil temperature are calculated, and the short-circuit resistance of the transformer winding at the oil temperature and the winding temperature is calculated, that is, any short-circuit force greater than the limit value indicates that the short-circuit resistance of the target transformer is insufficient, and when all short-circuit forces are less than the corresponding limit value, it means that the short-circuit resistance of the target transformer meets the requirements.

Table 2 Criteria for the short-circuit resistance of transformers

In a possible implementation, as shown in FIG2 , the present application provides a transformer short-circuit resistance verification device, comprising:

The data acquisition module 201 is used to obtain the fault recording data, oil surface temperature data and basic data of the target transformer, wherein the fault recording data includes the fault current data flowing through the target transformer when the circuit where the target transformer is located fails;

A determination module 202, configured to determine a target yield strength of a conductor in the target transformer based on the fault current data and the oil surface temperature data;

A calculation module 203 is used to construct a physical structure model of the target transformer based on the basic data, and obtain a target short-circuit force of the target transformer;

The judgment module 204 is used to check the short-circuit resistance capability of the target transformer according to the target short-circuit force and the target yield strength.

In one possible implementation, as shown in FIG3 , the present application provides a computer-readable storage medium 300 on which a computer program 311 is stored, and when the computer program 311 is executed by a processor, the following steps are implemented: obtaining fault recording data, oil surface temperature data, and basic data of a target transformer, wherein the fault recording data includes fault current data flowing through the target transformer when a circuit in which the target transformer is located fails; determining a target yield strength of a conductor in the target transformer based on the fault current data and the oil surface temperature data; constructing a physical structure model of the target transformer based on the basic data, and obtaining a target short-circuit force of the target transformer; and verifying the short-circuit resistance of the target transformer according to the target short-circuit force and the target yield strength.

In one possible implementation, as shown in FIG4 , an embodiment of the present application provides a computer-readable storage medium 400 on which a computer program 411 is stored. When the computer program 411 is executed by a processor, the following steps are implemented: obtaining fault recording data, oil level temperature data, and basic data of a target transformer, wherein the fault recording data includes fault current data flowing through the target transformer when a circuit in which the target transformer is located fails; determining a target yield strength of a conductor in the target transformer based on the fault current data and the oil level temperature data; constructing a physical structure model of the target transformer based on the basic data, and obtaining a target short-circuit force of the target transformer; and verifying the short-circuit resistance of the target transformer according to the target short-circuit force and the target yield strength.

The computer storage medium of the embodiment of the present invention can adopt any combination of one or more computer-readable media. The computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. The computer-readable storage medium can be, for example, but not limited to: an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples (non-exhaustive list) of computer-readable storage media include: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this document, a computer-readable storage medium can be any tangible medium containing or storing a program, which can be used by an instruction execution system, device or device or used in combination with it.

Computer-readable signal media may include data signals propagated in baseband or as part of a carrier wave, which carry computer-readable program code. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. Computer-readable signal media may also be any computer-readable medium other than a computer-readable storage medium, which may send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, apparatus, or device.

The program code embodied on the computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

Computer program code for performing the operations of the present invention may be written in one or more programming languages or a combination thereof, including object-oriented programming languages such as Java, Smalltalk, C++, and conventional procedural programming languages such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

It should be understood by those skilled in the art that the modules or steps of the present invention described above can be implemented by a general-purpose computing device, they can be concentrated on a single computing device, or distributed on a network composed of multiple computing devices, optionally, they can be implemented by a program code executable by a computer device, so that they can be stored in a storage device and executed by the computing device, or they can be made into individual integrated circuit modules, or multiple modules or steps therein can be made into a single integrated circuit module for implementation. Thus, the present invention is not limited to any specific combination of hardware and software.

Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described above, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

The above disclosure is only a preferred embodiment of the present invention, which certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.

Claims (10)

1. The method for checking the short circuit resistance of the transformer is characterized by comprising the following steps of:

collecting fault wave recording data, oil surface temperature data and basic data of a target transformer;

determining the target yield strength of the lead in the target transformer according to the fault wave recording data and the oil surface temperature data;

constructing a physical structure model of the target transformer based on the basic data, and calculating a target short-circuit force of the target transformer;

and checking the short-circuit resistance of the target transformer according to the target short-circuit force and the target yield strength.

2. The method of checking the short circuit resistance of a transformer according to claim 1, further comprising, prior to said step of determining a target yield strength of a wire in said target transformer from said fault current data and said oil level temperature data:

acquiring attribute information of a wire in the target transformer, wherein the factory information comprises manufacturer information, model information, service life information and environment information;

selecting a target conductor based on attribute information of the conductor in the target transformer;

performing yield strength tests at different temperatures according to the target wire to obtain a yield meter of the target wire;

and taking the yield degree meter of the target conductor as a target yield degree meter of the conductor in the target transformer.

3. The method of checking the short circuit resistance of a transformer according to claim 2, wherein the step of determining the target yield strength of the conductor in the target transformer based on the fault current data and the oil level temperature data comprises:

determining a target temperature of a wire within the target transformer based on the fault current data and the oil level temperature data;

and determining the target yield strength of the lead in the target transformer according to the target temperature and the target yield degree table.

4. The method of checking short-circuit resistance of a transformer according to claim 1, wherein the step of constructing a physical structure model of the target transformer based on the basic data comprises:

and establishing a physical structure model of the target transformer according to the structural parameters of the coil, the iron core and the tapping switch of the target transformer.

5. The method of checking short-circuit resistance of a transformer according to claim 4, wherein the step of calculating a target short-circuit force of the target transformer comprises:

calculating a leakage magnetic field based on the physical structure model, and acquiring the radial force of each wire in each turn of wires in the target transformer;

and determining the target short-circuit force of the target transformer according to the radial force.

6. The method of checking short circuit resistance of a transformer according to claim 5, wherein the step of determining a target short circuit force of the target transformer according to the radial force comprises:

determining average annular stretching short-circuit force of the continuous, spiral and multi-layer windings and average annular compression short-circuit force of the continuous, spiral and multi-layer windings according to the radial force of each wire on the continuous, spiral and multi-layer windings;

determining the radial bending short-circuit force of the wires in the span between the stays or the cushion blocks according to the radial force of the wires in the span between the stays or the cushion blocks;

determining axial bending short-circuit force of the wires in the span between the radial cushion blocks according to the radial force of the wires in the span between the radial cushion blocks;

determining a maximum axial compression force acting on each solid winding according to the maximum radial force on each solid winding;

and taking the average annular stretching short-circuit force, the average annular compression short-circuit force, the wire radial bending short-circuit force, the wire axial bending short-circuit force and the maximum axial compression force as target short-circuit forces of the target transformer.

7. The method of checking short-circuit resistance of a transformer according to claim 1, wherein the step of checking the short-circuit resistance of the target transformer based on the target short-circuit force and the target yield strength comprises:

multiplying the target yield strength by a preset coefficient to obtain a criterion of the target short-circuit force;

and matching the criterion with the target short-circuit force to obtain the short-circuit resistance of the target transformer.

8. The utility model provides a transformer short circuit resistance capability verifying attachment which characterized in that includes:

the data acquisition module is used for acquiring fault wave recording data, oil surface temperature data and basic data of a target transformer, wherein the fault wave recording data comprise fault current data flowing through the target transformer when a circuit where the target transformer is located is in a fault state;

the determining module is used for determining the target yield strength of the lead in the target transformer according to the fault current data and the oil surface temperature data;

the calculation module is used for constructing a physical structure model of the target transformer based on the basic data and calculating the target short-circuit force of the target transformer;

and the judging module is used for checking the short-circuit resistance of the target transformer according to the target short-circuit force and the target yield strength.

9. An electronic device, comprising: a processor, a memory and a bus, the memory storing machine readable instructions executable by the processor, the processor and the memory in communication via the bus when the electronic device is running, the machine readable instructions when executed by the processor performing the steps of the transformer short circuit resistance checking method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon a computer program which, when executed by a processor, performs the steps of the transformer short-circuit resistance checking method according to any one of claims 1 to 7.

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