A transformer capacity performance judgment method and system

Abstract

The application discloses a transformer capacity performance judgment method and system, and relates to the field of transformers, and solves the technical problem that the capacity performance of a transformer meeting a standard cannot be more accurately evaluated. It comprises the following steps: step one, a three-dimensional simulation model is established for a transformer structure; step two, load changes and transformer state changes are displayed for the three-dimensional simulation model; step three, the corresponding transformer three-dimensional simulation model is determined; step four, an index of the consistency between the transformer and different three-dimensional simulation models is obtained; step five, a first performance evaluation is performed on the transformer; and step six, a second performance evaluation is performed on the transformer. The capacity performance of the transformer is more accurately determined.

Description

Technical Field

[0001] This invention relates to the field of transformers, and more specifically, to a method and system for judging transformer capacity performance. Background Technology

[0002] Transformers are common and important electrical devices in power systems, used to change the magnitude of AC voltage. A transformer's capacity performance refers to its maximum stable output power or current, usually expressed in kilowatts (kW) or amperes (A). Accurately assessing transformer capacity performance is crucial for the operation and stability of power systems.

[0003] In factory power supply and distribution systems, determining transformer capacity performance is a critical technical issue. Traditional methods for assessing transformer capacity performance primarily rely on load testing and temperature rise testing. However, these methods only determine whether the transformer capacity is stable and meets standards; they do not provide a precise definition of transformer capacity performance, thus failing to offer a more accurate evaluation of the capacity performance of transformers that meet standards. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a method and system for judging transformer capacity performance in order to address the shortcomings of the prior art and solve the technical problem that it is impossible to make more accurate assessments of the capacity performance of transformers that meet the standards.

[0005] The present invention provides a method for determining the capacity performance of a transformer, comprising:

[0006] Step 1: Construct a 3D simulation model for the transformer;

[0007] Step 2: Display the load changes and transformer status changes using the 3D simulation model;

[0008] Step 3: Determine the corresponding 3D simulation model of the transformer;

[0009] Step 4: Obtain the compatibility index between the transformer and different 3D simulation models;

[0010] Step 5: Perform a first performance evaluation on the transformer;

[0011] Step Six: Perform a second performance evaluation on the transformer.

[0012] As a further improvement, the method for constructing a three-dimensional simulation model of the transformer in step one includes:

[0013] A standard transformer component template library is established, and several 3D simulation models of transformers are obtained through the standard transformer component template library;

[0014] The load input component, output current component, and output voltage component associated with the transformer were retrieved from the transformer standard component template library;

[0015] Connect the load input component, the output current component, and the output voltage component.

[0016] Furthermore, in step two, the method for displaying load changes and transformer state changes in the three-dimensional simulation model includes:

[0017] The parameters are set by selecting parameters within the range of design parameter variables of the three-dimensional simulation model;

[0018] The output current state is obtained by comparing the output parameters of the output standard current component and the output current component, and the output voltage state is obtained by comparing the output parameters of the output standard voltage component and the output voltage component.

[0019] Furthermore, in step three, the method for determining the corresponding three-dimensional simulation model of the transformer includes:

[0020] By scanning the design information of the transformer, a first set of design parameters is obtained;

[0021] The first set of design parameters is compared with the standard set of design parameters for each 3D simulation model in the transformer period standard component template library. The compatibility index between the transformer and different 3D simulation models is obtained through the comparison.

[0022] Based on the compatibility index between the transformer and different 3D simulation models, the corresponding 3D simulation model for the transformer is determined.

[0023] Furthermore, in step four, the method for obtaining the conformity index between the transformer and different three-dimensional simulation models includes:

[0024] Set a weight for the consistency evaluation;

[0025] The difference between the first design parameter and the standard design parameter in the first design parameter set of different types is obtained, and the difference is compared with the corresponding type of conformity evaluation bias weight to obtain a single type of conformity evaluation index.

[0026] All types of conformity evaluation indicators are obtained by calculating the conformity index between the transformer and different three-dimensional simulation models.

[0027] Furthermore, the expression for the compatibility index between the transformer and different three-dimensional simulation models is as follows:

[0028] ;

[0029] in, W n The compatibility index between the nth transformer and different 3D simulation models is given. k i For the i-th type of the conformity evaluation index, It is the difference between the first design parameter of the i-th type and the standard design parameter.

[0030] Furthermore, in step five, the method for performing a first performance evaluation on the transformer includes:

[0031] A time reference axis is established, and current standard characteristic factors and voltage standard characteristic factors are set for different time nodes of the time reference axis.

[0032] For the output current of the transformer, obtain the current output curve; for the output voltage of the transformer, obtain the voltage output curve.

[0033] For the current output curve, obtain the first characteristic factor of the current output curve at different time points;

[0034] For the voltage output curve, obtain the second characteristic factor of the voltage output curve at different time points;

[0035] By comparing the first characteristic factor on the time axis with the corresponding current standard characteristic factor, and by comparing the second characteristic factor on the time axis with the corresponding voltage standard characteristic factor, a first performance evaluation of the transformer can be obtained.

[0036] The expression for calculating the first performance evaluation of the transformer is:

[0037] ;

[0038] in, p 1 represents the value corresponding to the first performance evaluation of the transformer. m i Let be the transformation function of the i-th first characteristic factor. D x 1i Let i be the difference between the i-th first characteristic factor and the current standard characteristic factor. r 1i Let be the performance evaluation adjustment coefficient for the i-th first characteristic factor. f i Let be the transformation function of the i-th second characteristic factor. Δx 2i Let i be the difference between the i-th second characteristic factor and the voltage standard characteristic factor. r 2i, is the performance evaluation adjustment coefficient for the i-th second characteristic factor.

[0039] Furthermore, in step six, the method for performing a second performance evaluation on the transformer includes:

[0040] Establish a time reference axis and set standard temperature characteristic factors for different temperature nodes of the time reference axis;

[0041] For the temperature changes of the transformer, obtain the temperature change curve;

[0042] For the temperature change curve, obtain the real-time temperature characteristic factors of the temperature change curve at different time points;

[0043] By comparing the real-time temperature at different time points with the standard temperature at the corresponding time points on the time reference axis, and combining this with the duration of the test load applied to the transformer, the second performance evaluation of the transformer is obtained by comparing the second characteristic factor on the time axis with the corresponding voltage standard characteristic factor.

[0044] The expression for calculating the second performance evaluation of the transformer is as follows:

[0045]

[0046] in, p 2 represents the second performance evaluation value of the transformer. Let i be the transformation function of the i-th real-time temperature feature factor. The interpolation of the real-time temperature characteristic factor and the standard temperature characteristic factor at the i-th time node is given. Let t be the adjustment coefficient for the i-th performance evaluation, t be the duration of applying the test load to the transformer, and b be the time adjustment constant.

[0047] A transformer capacity performance assessment system, comprising:

[0048] The transformer design information analysis module is used to acquire transformer design information, analyze the transformer design information, and determine the standard capacity of the transformer.

[0049] The 3D simulation model generation module is used to construct a 3D simulation model for the transformer, which is used to display load changes and transformer state changes.

[0050] The load application module is used to determine the capacity performance test strategy based on the standard capacity of the transformer, and apply a test load to the transformer based on the capacity performance test strategy.

[0051] The capacity performance evaluation module is used to acquire the output current and output voltage of the transformer, perform a first performance evaluation on the transformer based on the output current and output voltage, acquire the temperature of the transformer, perform a second performance evaluation on the transformer based on the temperature change characteristics of the transformer, and determine the capacity performance of the transformer based on the first and second performance evaluations.

[0052] Beneficial effects

[0053] The advantages of this invention are:

[0054] The transformer design information is analyzed to determine the standard capacity. A 3D simulation model is constructed to demonstrate load changes and transformer state changes. Based on the standard capacity, a capacity performance testing strategy is determined, and a test load is applied to the transformer to obtain its output current and voltage. A first performance evaluation is performed based on the output current and voltage. The transformer temperature is then obtained, and a second performance evaluation is performed based on the temperature change characteristics. Based on the first and second performance evaluations, the transformer's capacity performance is determined. By conducting these two capacity performance evaluations, the transformer's capacity performance is determined more accurately. Attached Figure Description

[0055] Figure 1 This is a flowchart of the transformer capacity performance judgment method of the present invention;

[0056] Figure 2 This is a block diagram of the transformer capacity performance judgment system of the present invention. Detailed Implementation

[0057] The present invention will be further described below with reference to embodiments, but this does not constitute any limitation on the present invention. Any limited modifications made by any person within the scope of the claims of the present invention are still within the scope of the claims of the present invention.

[0058] See Figure 1-Figure 2 The present invention provides a method and system for judging transformer capacity performance, comprising:

[0059] Step 1: Construct a 3D simulation model for the transformer;

[0060] Step 2: Display the load changes and transformer status changes using the 3D simulation model;

[0061] Step 3: Determine the corresponding 3D simulation model of the transformer;

[0062] Step 4: Obtain the compatibility index between the transformer and different 3D simulation models;

[0063] Step 5: Conduct the first performance evaluation of the transformer;

[0064] Step Six: Perform a second performance evaluation on the transformer.

[0065] In step one, the method for constructing a three-dimensional simulation model of the transformer includes:

[0066] Establish a standard transformer parts template library, and obtain several 3D simulation models of transformers from the standard transformer parts template library;

[0067] The load input components, output current components, and output voltage components associated with the transformer were retrieved from the transformer standard component template library;

[0068] By connecting the load input component, output current component, and output voltage component, a simulation model of the transformer is constructed.

[0069] In step two, the load changes and transformer state changes are displayed in the 3D simulation model, including:

[0070] Parameters are set by selecting parameters within the range of design parameter variables for the 3D simulation model;

[0071] The output current state is obtained by comparing the output parameters of the standard output current component and the output current component, and the output voltage state is obtained by comparing the output parameters of the standard output voltage component and the output voltage component, so as to display the three-dimensional simulation model.

[0072] The expression for calculating the current value of the output current state is:

[0073] I 状态 =I 输出标准组件 -I 输出电流组件

[0074] Among them I 状态 I represents the current value in the output current state. 输出标准组件 To output the current value of the standard current component, I 输出电流组件 This refers to the current value of the output current component. When the current value I of the standard current component... 输出标准组件 The current value I of the output current component is 2A. 输出电流组件 When the current is 1A, the current value I of the output current state 状态 It is 1A.

[0075] The expression for calculating the voltage value of the output voltage state is:

[0076] V 状态 =V 输出标准组件 -V 输出电压组件

[0077] Where V 状态V represents the voltage value of the output electrical state. 输出标准组件 To output the voltage value of the standard voltage component, V 输出电压组件 This refers to the voltage value of the output voltage component. When the voltage value V of the standard voltage component... 输出标准组件 The voltage value V of the output voltage component is 2V. 输出电压组件 When the voltage is 1V, the voltage value V of the output voltage state 状态 It is 1V.

[0078] In step three, the method for determining the corresponding transformer 3D simulation model includes:

[0079] The first set of design parameters is obtained by scanning the transformer's design information;

[0080] The first set of design parameters is compared with the standard set of design parameters for each 3D simulation model in the transformer period standard component template library. The compatibility index between the transformer and different 3D simulation models is obtained through the comparison.

[0081] Based on the compatibility index between the transformer and different 3D simulation models, the corresponding 3D simulation model for the transformer is determined.

[0082] In step four, the methods for obtaining the compatibility index between the transformer and different 3D simulation models include:

[0083] Set a weight for the consistency evaluation;

[0084] The difference between the first design parameter and the standard design parameter in different types of first design parameter sets is obtained. The difference is compared with the corresponding type of conformity evaluation bias weight to obtain the conformity evaluation index for a single type.

[0085] All types of conformity evaluation indicators are obtained by calculation of the conformity indicators between the transformer and different three-dimensional simulation models.

[0086] The expression for the compatibility index between the transformer and different 3D simulation models is as follows:

[0087] ;

[0088] in, W n The compatibility index between the nth transformer and different 3D simulation models is given. k i For the i-th type of the conformity evaluation index, It is the difference between the first design parameter of the i-th type and the standard design parameter.

[0089] In step five, the method for performing the first performance evaluation of the transformer includes:

[0090] A time reference axis is established, and current standard characteristic factors and voltage standard characteristic factors are set for different time nodes of the time reference axis.

[0091] For the transformer's output current, obtain the current output curve; for the transformer's output voltage, obtain the voltage output curve.

[0092] For the current output curve, obtain the first characteristic factor of the current output curve at different time points;

[0093] For the voltage output curve, obtain the second characteristic factor of the voltage output curve at different time points;

[0094] By comparing the first characteristic factor on the time axis with the corresponding current standard characteristic factor, and comparing the second characteristic factor on the time axis with the corresponding voltage standard characteristic factor, the first performance evaluation of the transformer can be obtained.

[0095] The expression for calculating the first performance evaluation value of the transformer is:

[0096] ;

[0097] in, p 1 represents the value corresponding to the first performance evaluation of the transformer. m i Let be the transformation function of the i-th first characteristic factor. D x 1i Let i be the difference between the i-th first characteristic factor and the current standard characteristic factor. r 1i Let be the performance evaluation adjustment coefficient for the i-th first characteristic factor. f i Let be the transformation function of the i-th second characteristic factor. Δx 2i Let i be the difference between the i-th second characteristic factor and the voltage standard characteristic factor. r 2i , is the performance evaluation adjustment coefficient for the i-th second characteristic factor.

[0098] In step six, the method for performing a second performance evaluation on the transformer includes:

[0099] Establish a time reference axis and set standard temperature characteristic factors for different temperature nodes of the time reference axis;

[0100] To detect temperature changes in the transformer, obtain the temperature change curve.

[0101] For the temperature change curve, obtain the real-time temperature characteristic factors of the temperature change curve at different time points.

[0102] By comparing the real-time temperature at different time points with the standard temperature at the corresponding time points on the time reference axis, and combining this with the duration of the test load applied to the transformer, the second performance evaluation of the transformer is obtained by comparing the second characteristic factor on the time axis with the corresponding voltage standard characteristic factor.

[0103] The expression for calculating the second performance evaluation of the transformer is:

[0104] ;

[0105] in, p 2 represents the second performance evaluation value of the transformer. oh i Let i be the transformation function of the i-th real-time temperature feature factor. Δx 2i The interpolation of the real-time temperature characteristic factor and the standard temperature characteristic factor at the i-th time node is given. l i Let t be the adjustment coefficient for the i-th performance evaluation, t be the duration of applying the test load to the transformer, and b be the time adjustment constant.

[0106] A transformer capacity performance assessment system, comprising:

[0107] The transformer design information analysis module is used to acquire transformer design information, analyze the transformer design information, and determine the standard capacity of the transformer.

[0108] The 3D simulation model generation module is used to build a 3D simulation model of the transformer. The 3D simulation model is used to display load changes and transformer state changes.

[0109] The load application module is used to determine the capacity performance test strategy based on the standard capacity of the transformer, and apply test load to the transformer based on the capacity performance test strategy.

[0110] The capacity performance evaluation module is used to acquire the transformer's output current and output voltage, and to perform a first performance evaluation on the transformer based on the output current and output voltage. It also acquires the transformer's temperature and performs a second performance evaluation on the transformer based on the temperature change characteristics. Based on the first and second performance evaluations, the capacity performance of the transformer is determined.

[0111] By setting up a transformer design information analysis module, a 3D simulation model generation module, a load application module, and a capacity performance evaluation module, the capacity performance of the transformer is determined. Through two types of capacity performance evaluation, the capacity performance of the transformer is determined more accurately.

[0112] The following technical means can be used to apply technical loads to transformers:

[0113] (1) Resistive Load Bank: A resistive load bank is a device used to simulate resistive loads. It typically contains multiple adjustable resistor units, which can be adjusted to simulate different load conditions. In capacity performance testing, the resistive load bank can be connected to the output side (secondary side) of the transformer, and the load can be gradually increased to evaluate the transformer's performance under different load conditions.

[0114] (2) Electronic load: An electronic load is a device used to simulate electronic loads. It can adjust the load characteristics in real time through electronic components to simulate different current and power loads. Electronic loads have higher flexibility and accuracy and are suitable for fine load testing of transformers.

[0115] (3) Regulated power supply: A regulated power supply is used to provide a stable power supply voltage to ensure that the input voltage of the transformer remains constant during the test. Regulated power supplies usually have high stability and response speed, and are suitable for dynamic load testing of transformers.

[0116] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of the present invention, and these will not affect the effectiveness of the implementation of the present invention or the practicality of the patent.

Claims

1. A method for judging the capacity performance of a transformer, characterized in that, It includes: Step 1: Construct a 3D simulation model for the transformer; Step 2: Display the load changes and transformer status changes using the 3D simulation model; Step 3: Determine the corresponding 3D simulation model of the transformer; Step 4: Obtain the compatibility index between the transformer and different 3D simulation models; Step 5: Perform a first performance evaluation on the transformer; Step Six: Perform a second performance evaluation on the transformer; In step three, the method for determining the corresponding three-dimensional simulation model of the transformer includes: By scanning the design information of the transformer, a first set of design parameters is obtained; The first set of design parameters is compared with the standard set of design parameters for each 3D simulation model in the transformer period standard component template library. The compatibility index between the transformer and different 3D simulation models is obtained through the comparison. Based on the compatibility index between the transformer and different 3D simulation models, the 3D simulation model corresponding to the transformer is determined. In step five, the method for performing a first performance evaluation on the transformer includes: A time reference axis is established, and current standard characteristic factors and voltage standard characteristic factors are set for different time nodes of the time reference axis. For the output current of the transformer, obtain the current output curve; for the output voltage of the transformer, obtain the voltage output curve. For the current output curve, obtain the first characteristic factor of the current output curve at different time points; For the voltage output curve, obtain the second characteristic factor of the voltage output curve at different time points; The first performance evaluation of the transformer is obtained by comparing the first characteristic factor on the time reference axis with the corresponding current standard characteristic factor, and by comparing the second characteristic factor on the time reference axis with the corresponding voltage standard characteristic factor. In step six, the method for performing a second performance evaluation on the transformer includes: Establish a time reference axis and set standard temperature characteristic factors for different temperature nodes of the time reference axis; For the temperature changes of the transformer, obtain the temperature change curve; For the temperature change curve, obtain the real-time temperature characteristic factors of the temperature change curve at different time points; By comparing the real-time temperature at different time points with the standard temperature at the corresponding time points on the time reference axis, and combining this with the duration of the test load applied to the transformer, the second performance evaluation of the transformer is obtained by comparing the second characteristic factor on the time reference axis with the corresponding voltage standard characteristic factor.

2. The method for judging transformer capacity performance according to claim 1, characterized in that, In step one, the method for constructing a three-dimensional simulation model of the transformer includes: A standard transformer component template library is established, and several 3D simulation models of transformers are obtained through the standard transformer component template library; The load input component, output current component, and output voltage component associated with the transformer were retrieved from the transformer standard component template library; Connect the load input component, the output current component, and the output voltage component.

3. The method for judging transformer capacity performance according to claim 2, characterized in that, In step two, the method for displaying load changes and transformer state changes in the three-dimensional simulation model includes: The parameters are set by selecting parameters within the range of design parameter variables of the three-dimensional simulation model; The output current state is obtained by comparing the output parameters of the output standard current component and the output current component, and the output voltage state is obtained by comparing the output parameters of the output standard voltage component and the output voltage component.

4. The method for judging transformer capacity performance according to claim 1, characterized in that, In step four, the method for obtaining the compatibility index between the transformer and different three-dimensional simulation models includes: Set a weight for the consistency evaluation; The difference between the first design parameter and the standard design parameter in the first design parameter set of different types is obtained, and the difference is compared with the corresponding type of conformity evaluation bias weight to obtain a single type of conformity evaluation index. All types of conformity evaluation indicators are obtained by calculating the conformity index between the transformer and different three-dimensional simulation models.

5. The method for judging transformer capacity performance according to claim 4, characterized in that, The expression for the compatibility index between the transformer and different 3D simulation models is as follows: ； in, W n The compatibility index between the nth transformer and different 3D simulation models is given. k i For the i-th type of the conformity evaluation index, It is the difference between the first design parameter of the i-th type and the standard design parameter.

6. The method for judging transformer capacity performance according to claim 1, characterized in that, The expression for calculating the first performance evaluation of the transformer is: ； in, p 1 represents the value corresponding to the first performance evaluation of the transformer. μ i Let be the transformation function of the i-th first characteristic factor. Δx 1i Let i be the difference between the i-th first characteristic factor and the current standard characteristic factor. r 1i Let be the performance evaluation adjustment coefficient for the i-th first characteristic factor. φ i Let be the transformation function of the i-th second characteristic factor. Δx 2i Let i be the difference between the i-th second characteristic factor and the voltage standard characteristic factor. r 2i , is the performance evaluation adjustment coefficient for the i-th second characteristic factor.

7. The method for judging transformer capacity performance according to claim 1, characterized in that, The expression for calculating the second performance evaluation of the transformer is as follows: ； in, p 2 represents the second performance evaluation value of the transformer. ω i Let i be the transformation function of the i-th real-time temperature feature factor. Δx 2i The interpolation of the real-time temperature characteristic factor and the standard temperature characteristic factor at the i-th time node is given. l i Let t be the adjustment coefficient for the i-th performance evaluation, t be the duration of applying the test load to the transformer, and b be the time adjustment constant.

8. A system for determining transformer capacity performance using any one of claims 1-7, characterized in that, It includes: The transformer design information analysis module is used to acquire transformer design information, analyze the transformer design information, and determine the standard capacity of the transformer. A 3D simulation model generation module is used to construct a 3D simulation model for the transformer, which is used to display load changes and transformer state changes. The load application module is used to determine the capacity performance test strategy based on the standard capacity of the transformer, and apply a test load to the transformer based on the capacity performance test strategy. The capacity performance evaluation module is used to acquire the output current and output voltage of the transformer, perform a first performance evaluation on the transformer based on the output current and output voltage, acquire the temperature of the transformer, perform a second performance evaluation on the transformer based on the temperature change characteristics of the transformer, and determine the capacity performance of the transformer based on the first and second performance evaluations.

Images