Equivalent circuit construction method and device of magnetic control transformer, equipment and storage medium

Abstract

The application discloses a magnetic control transformer equivalent circuit construction method, device, equipment and storage medium. The method can construct a magnetic circuit model of a magnetic control transformer, and the magnetic circuit model is used for determining the relationship between various magnetic circuit electrical quantities. Based on the magnetic circuit model, the parameter values of various magnetic-electric parameters of the magnetic control transformer are calculated. Based on this, the magnetic coupling relationship between the various magnetic circuit electrical quantities and the various parameter values can be improved, and the accuracy of the equivalent circuit is improved. Based on the magnetic circuit model and the various parameter values, the equivalent circuit of the magnetic control transformer is constructed. Based on this, the equivalent circuit can reflect the relationship between the various parameter values and the various magnetic circuit electrical quantities, strengthen the electromagnetic relationship reflected by the equivalent circuit, further improve the magnetic characteristics of the magnetic control transformer, and improve the accuracy of the application. It can be seen that the application can provide an equivalent circuit construction method for the magnetic control transformer, and further improve the accuracy of the constructed equivalent circuit.

Description

Technical Field

[0001] This application relates to the field of power grid technology, and more specifically, to a method, apparatus, device, and storage medium for constructing an equivalent circuit of a magnetically controlled transformer. Background Technology

[0002] In power grids, voltage stability is one of the key indicators for measuring the overall reliability of the power system. Transformers, as representative of power distribution equipment, have always played a crucial role in maintaining the stable operation of the power system. With the high proportion of new energy sources being integrated into the grid, distributed loads are experiencing more frequent and larger fluctuations, placing new performance demands on transformers.

[0003] Magnetically controlled transformers have emerged, combining the stability of traditional transformers with the stepless voltage regulation advantages of power electronic converters, and are gradually attracting the attention of major research institutions. To study various magnetically controlled transformers, these institutions have attempted to construct equivalent circuits to determine the basic electromagnetic relationships and voltage regulation effects under certain operating conditions. Existing techniques use methods similar to those for traditional transformers to construct equivalent circuits for magnetically controlled transformers. However, magnetically controlled transformers are not inherently traditional transformers, leading to low reliability of the constructed equivalent circuits and consequently, low accuracy in the obtained basic electromagnetic relationships and voltage regulation effects. Therefore, providing a method for constructing equivalent circuits for magnetically controlled transformers has become a key focus for researchers in this field. Summary of the Invention

[0004] In view of this, this application provides a method, apparatus, device and storage medium for constructing an equivalent circuit of a magnetically controlled transformer, which solves the problem of low reliability of the equivalent circuit of a magnetically controlled transformer constructed by the prior art.

[0005] To achieve the above objectives, the following solution is proposed:

[0006] A method for constructing the equivalent circuit of a magnetically controlled transformer includes:

[0007] A magnetic circuit model of a magnetically controlled transformer is constructed, which is used to determine the relationship between the electrical quantities of each magnetic circuit.

[0008] Based on the magnetic circuit model, the parameter values ​​of each magnetoelectric parameter of the magnetically controlled transformer are calculated;

[0009] Based on the magnetic circuit model and the values ​​of each parameter, the equivalent circuit of the magnetically controlled transformer is constructed.

[0010] Optionally, the construction of the magnetic circuit model of the magnetically controlled transformer includes:

[0011] Based on the transformer type and design scheme of the magnetically controlled transformer, a magnetic circuit model of the magnetically controlled transformer is constructed.

[0012] Optionally, the step of constructing the magnetic circuit model of the magnetically controlled transformer based on the transformer type and design scheme includes:

[0013] Based on the design scheme, the magnetomotive force generated by the primary winding current, the magnetomotive force generated by the secondary winding current, the magnetomotive force generated by the DC winding current, the mutual inductance reluctance, and the branch reluctance of the magnetically controlled transformer are obtained.

[0014] Based on the transformer type and design scheme of the magnetically controlled transformer, the magnetic reluctance of the primary winding and the magnetic reluctance of the secondary winding of the magnetically controlled transformer are obtained.

[0015] Based on the design scheme, the combination of the magnetomotive force generated by the primary winding current, the magnetomotive force generated by the secondary winding current, the magnetomotive force generated by the DC winding current, the mutual inductance reluctance, the branch reluctance, the primary winding reluctance and the secondary winding reluctance of the magnetically controlled transformer are determined to form a magnetic circuit model.

[0016] Optionally, constructing the equivalent circuit of the magnetically controlled transformer based on the magnetic circuit model and various parameter values ​​includes:

[0017] Based on the various parameter values, the magnetomotive force of the nonlinear magnetic circuit part in the magnetic circuit model is equivalent to a voltage-controlled current source, and the magnetomotive force of the primary winding and the secondary winding in the magnetic circuit model are equivalent to a current-controlled voltage source, thus forming the equivalent circuit of the magnetically controlled transformer.

[0018] Optionally, the step of calculating the parameter values ​​of each magnetoelectric parameter of the magnetically controlled transformer based on the magnetic circuit model includes:

[0019] Based on the magnetic circuit model, obtain the functional relationships corresponding to each magnetoelectric parameter of the magnetically controlled transformer;

[0020] Discretize each functional relationship, and based on the magnetic circuit electrical quantities in the magnetic circuit model, solve for the parameter values ​​of each magnetoelectric parameter of the magnetically controlled transformer.

[0021] Optionally, obtaining the functional relationships corresponding to each magnetoelectric parameter of the magnetically controlled transformer based on the magnetic circuit model includes:

[0022] Based on the magnetic circuit model, the leakage flux calculation function of the magnetically controlled transformer is obtained, wherein the leakage flux calculation function is constructed based on the typical equations of an ideal transformer and the typical Maxwell equations.

[0023] Based on the magnetic circuit model, the voltage calculation function of the magnetically controlled transformer is obtained, and the voltage calculation function is constructed based on the typical electromagnetic field equations.

[0024] Optionally, the various functional relationships are discretized, and based on the magnetic circuit electrical quantities in the magnetic circuit model, the parameter values ​​of various magnetoelectric parameters of the magnetically controlled transformer are solved, including:

[0025] Discretize the functional relationship, and based on the magnetic circuit electrical quantities in the magnetic circuit model, solve for the leakage flux generated by the primary current, the leakage flux generated by the secondary current, the primary voltage, and the secondary voltage of the magnetically controlled transformer.

[0026] A device for constructing an equivalent circuit of a magnetically controlled transformer, comprising:

[0027] A construction module is used to construct a magnetic circuit model of a magnetically controlled transformer, wherein the magnetic circuit model is used to determine the relationship between the electrical quantities of each magnetic circuit;

[0028] The calculation module is used to calculate the parameter values ​​of each magnetoelectric parameter of the magnetically controlled transformer based on the magnetic circuit model.

[0029] The module is used to construct the equivalent circuit of the magnetically controlled transformer based on the magnetic circuit model and various parameter values.

[0030] An apparatus for constructing an equivalent circuit of a magnetically controlled transformer, comprising a memory and a processor;

[0031] The memory is used to store programs;

[0032] The processor is used to execute the program to implement each step of the above-described method for constructing the equivalent circuit of a magnetically controlled transformer.

[0033] A readable storage medium having a computer program stored thereon, characterized in that, when the computer program is executed by a processor, it implements each step of the above-described method for constructing an equivalent circuit of a magnetically controlled transformer.

[0034] As can be seen from the above technical solutions, the method for constructing the equivalent circuit of a magnetically controlled transformer provided in this application can construct a magnetic circuit model of the magnetically controlled transformer. The magnetic circuit model is used to determine the relationship between the electrical quantities of each magnetic circuit. Based on the magnetic circuit model, the parameter values ​​of each magnetoelectric parameter of the magnetically controlled transformer are calculated. Since the magnetic circuit model can be used to determine the relationship between the electrical quantities of each magnetic circuit of the magnetically controlled transformer, the parameter values ​​of each magnetoelectric parameter can be determined through the relationship between the electrical quantities of each magnetic circuit in the magnetic circuit model, improving the magnetic coupling relationship between the electrical quantities of each magnetic circuit and the parameter values, and improving the accuracy of the equivalent circuit of this application. Based on the magnetic circuit model and the parameter values, the equivalent circuit of the magnetically controlled transformer is constructed. Therefore, the relationship between the electrical quantities of the magnetic circuit can be determined through the magnetic circuit model, and the parameter values ​​of the magnetoelectric parameters are determined by the magnetic circuit model. Thus, when constructing the equivalent circuit by combining the magnetic circuit model and the parameter values, the equivalent circuit can reflect the relationship between the parameter values ​​and the electrical quantities of each magnetic circuit, strengthening the electromagnetic relationship reflected by the equivalent circuit, further improving the magnetic characteristics of the magnetically controlled transformer of this application, and improving the accuracy of this application. Therefore, this application can provide an equivalent circuit construction method for magnetically controlled transformers and further improve the accuracy of the constructed equivalent circuit. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0036] Figure 1 This is a flowchart of a method for constructing an equivalent circuit of a magnetically controlled transformer, as disclosed in an embodiment of this application.

[0037] Figure 2 This is a magnetic circuit model diagram of a magnetically controlled transformer, as exemplified by an embodiment of this application.

[0038] Figure 3 An equivalent circuit diagram of a magnetically controlled transformer is provided as an example of an embodiment of this application.

[0039] Figure 4 This is a structural block diagram of an equivalent circuit construction device for a magnetically controlled transformer disclosed in an embodiment of this application;

[0040] Figure 5 This is a hardware structure block diagram of a magnetically controlled transformer equivalent circuit construction device disclosed in an embodiment of this application. Detailed Implementation

[0041] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0042] The method for constructing the equivalent circuit of the magnetically controlled transformer described in this application can be used in a wide range of general-purpose or special-purpose computing environments or configurations. Examples include: personal computers, server computers, handheld or portable devices, tablet devices, multiprocessor devices, and distributed computing environments including any of the above devices.

[0043] Next, combine Figure 1 The method for constructing the equivalent circuit of the magnetically controlled transformer in this application is described in detail, including the following steps:

[0044] Step S1: Construct the magnetic circuit model of the magnetically controlled transformer.

[0045] Specifically, magnetic circuit models can be used to determine the relationships between electrical quantities in various magnetic circuits.

[0046] Among them, the electrical quantities of each magnetic circuit can be the electrical quantities that can be obtained based on the design scheme of the magnetically controlled transformer and the transformer type of the magnetically controlled transformer, such as the magnetomotive force generated by the primary winding current, the magnetomotive force generated by the secondary winding current, the magnetomotive force generated by the DC winding current, mutual inductance reluctance, branch reluctance, primary winding reluctance and secondary winding reluctance.

[0047] Therefore, the magnetic circuit model can include the magnetomotive force generated by the primary winding current, the magnetomotive force generated by the secondary winding current, the magnetomotive force generated by the DC winding current, the mutual inductance reluctance, the branch reluctance, the primary winding reluctance, and the secondary winding reluctance of the magnetically controlled transformer. Simultaneously, the magnetic circuit model can also include the connection relationships between the magnetomotive force generated by the primary winding current, the secondary winding current, the DC winding current, the mutual inductance reluctance, the branch reluctance, and the primary and secondary winding reluctances of the magnetically controlled transformer.

[0048] Figure 2 This is a magnetic circuit model diagram of a magnetically controlled transformer, which is an example of an embodiment of this application.

[0049] Figure 2 In the diagram, F1 represents the magnetomotive force generated by the primary winding current, and F2 represents the magnetomotive force generated by the secondary winding current. dc R represents the magnetomotive force generated by the DC winding current. L1 R represents the magnetic reluctance of the primary winding. L2 R represents the reluctance of the secondary winding. CR1 and R2 represent the mutual inductance reluctance, and R1 and R2 represent the branch reluctance generated by the DC winding.

[0050] Different types of magnetically controlled transformers have different design schemes, and their magnetic circuit models are also different.

[0051] Step S2: Based on the magnetic circuit model, calculate the parameter values ​​of each magnetoelectric parameter of the magnetically controlled transformer.

[0052] Specifically, the parameter values ​​of each preset magnetoelectric parameter can be calculated based on the electrical quantities and connection relationships of each magnetic circuit in the magnetic circuit model.

[0053] Each magnetoelectric parameter can be determined in advance according to actual needs and / or the type of magnetically controlled transformer.

[0054] The various magnetoelectric parameters can be those that cannot be obtained through the design scheme of the magnetically controlled transformer or by measuring the magnetically controlled transformer, and are required to construct the equivalent circuit.

[0055] Step S3: Based on the magnetic circuit model and the values ​​of each parameter, construct the equivalent circuit of the magnetically controlled transformer.

[0056] Specifically, the magnetomotive force of the nonlinear magnetic circuit part in the magnetic circuit model can be equivalent to a voltage-controlled current source, and the magnetomotive force of the primary winding and the secondary winding in the magnetic circuit model can be equivalent to a current-controlled voltage source, forming the equivalent circuit of the magnetically controlled transformer. The magnitudes of the voltage-controlled current source and the current-controlled voltage source are calculated by various parameter values.

[0057] As can be seen from the above technical solutions, the method for constructing the equivalent circuit of a magnetically controlled transformer provided in this application can construct a magnetic circuit model of the magnetically controlled transformer. The magnetic circuit model is used to determine the relationship between the electrical quantities of each magnetic circuit. Based on the magnetic circuit model, the parameter values ​​of each magnetoelectric parameter of the magnetically controlled transformer are calculated. Since the magnetic circuit model can be used to determine the relationship between the electrical quantities of each magnetic circuit of the magnetically controlled transformer, the parameter values ​​of each magnetoelectric parameter can be determined through the relationship between the electrical quantities of each magnetic circuit in the magnetic circuit model, improving the magnetic coupling relationship between the electrical quantities of each magnetic circuit and the parameter values, and improving the accuracy of the equivalent circuit of this application. Based on the magnetic circuit model and the parameter values, the equivalent circuit of the magnetically controlled transformer is constructed. Therefore, the relationship between the electrical quantities of the magnetic circuit can be determined through the magnetic circuit model, and the parameter values ​​of the magnetoelectric parameters are determined by the magnetic circuit model. Thus, when constructing the equivalent circuit by combining the magnetic circuit model and the parameter values, the equivalent circuit can reflect the relationship between the parameter values ​​and the electrical quantities of each magnetic circuit, strengthening the electromagnetic relationship reflected by the equivalent circuit, further improving the magnetic characteristics of the magnetically controlled transformer of this application, and improving the accuracy of this application. Therefore, this application can provide an equivalent circuit construction method for magnetically controlled transformers and further improve the accuracy of the constructed equivalent circuit.

[0058] In some embodiments of this application, the process of step S1, constructing the magnetic circuit model of the magnetically controlled transformer, is described in detail as follows:

[0059] S10. Based on the transformer type and design scheme of the magnetically controlled transformer, construct the magnetic circuit model of the magnetically controlled transformer.

[0060] Specifically, there are various types of magnetically controlled transformers, such as three-core double-winding transformers and magnetic high-frequency transformers.

[0061] Different types of magnetically controlled transformers result in different connection relationships of various magnetic circuit electrical quantities in the magnetic circuit model. Different design schemes also result in different values ​​of various magnetic circuit electrical quantities in the magnetic circuit model.

[0062] Taking a common three-core, two-winding transformer as an example, its primary high-voltage winding is on the outside, and its secondary low-voltage winding is on the inside. Therefore, from the perspective of magnetic flux relationship, the magnetic flux of the core column is completely contained within the secondary low-voltage winding, while the main magnetic flux and leakage flux of the secondary winding are completely contained within the primary winding. The magnetic flux of the primary and secondary windings that closes in space is the leakage flux. Thus, the magnetic circuit model of a three-core, two-winding transformer can be represented as follows: the magnetomotive force generated by the primary and secondary windings is connected in reverse series and then in series with the reluctance of the core column and the branch reluctance to generate the main magnetic flux; the leakage reluctance is connected in parallel to the secondary winding magnetomotive force according to the spatial distribution of the leakage flux. The two ends of the magnetomotive force of the primary and secondary windings, such as... Figure 2 As shown.

[0063] The values ​​of each magnetoresistance and magnetomotive force can be obtained based on the design scheme.

[0064] Therefore, the connection relationship of each magnetic circuit electrical quantity can be determined based on the transformer type of the magnetically controlled transformer.

[0065] Based on the design scheme, determine the magnitude of the electrical quantities of each magnetic circuit.

[0066] As can be seen from the above technical solutions, this application provides an optional way to construct a magnetic circuit model. The above method can be used to construct a magnetic circuit model by comprehensively designing the scheme and transformer type, which can further improve the magnetic coupling relationship between the transformer type of the magnetically controlled transformer and the magnetic circuit model, and improve the accuracy of the equivalent circuit.

[0067] In some embodiments of this application, the process of constructing the magnetic circuit model of the magnetically controlled transformer based on the transformer type and design scheme of the magnetically controlled transformer is described in detail, and the steps are as follows:

[0068] S100. Based on the design scheme, obtain the magnetomotive force generated by the primary winding current, the magnetomotive force generated by the secondary winding current, the magnetomotive force generated by the DC winding current, the mutual inductance reluctance, and the branch reluctance of the magnetically controlled transformer.

[0069] Specifically, the magnetomotive force generated by the primary winding current, the magnetomotive force generated by the secondary winding current, the magnetomotive force generated by the DC winding current, the mutual inductance reluctance, and the branch reluctance can be extracted from the design scheme of the magnetically controlled transformer.

[0070] S101. Based on the transformer type and design scheme of the magnetically controlled transformer, obtain the magnetic reluctance of the primary winding and the magnetic reluctance of the secondary winding of the magnetically controlled transformer.

[0071] Specifically, the calculation functions for the primary winding reluctance and secondary winding reluctance of a magnetically controlled transformer can be determined based on the transformer type of the magnetically controlled transformer.

[0072] The required values ​​for the calculation function are extracted from the design scheme and substituted into the calculation function to calculate the magnetic reluctance of the primary winding and the magnetic reluctance of the secondary winding.

[0073] For example, if the magnetically controlled transformer is a three-core double-winding transformer, the calculation function includes the length of the closed path, the air gap permeability, and the magnetic reluctance. The length of the closed path and the air gap permeability can be extracted from the design scheme and substituted into the calculation function to calculate the magnetic reluctance of the primary winding and the secondary winding.

[0074] S102. Based on the design scheme, determine the combination of the magnetomotive force generated by the primary winding current, the magnetomotive force generated by the secondary winding current, the magnetomotive force generated by the DC winding current, the mutual inductance reluctance, the branch reluctance, the primary winding reluctance and the secondary winding reluctance of the magnetically controlled transformer, and form a magnetic circuit model.

[0075] Specifically, based on the design scheme and the transformer type of the magnetically controlled transformer, the combination of the magnetomotive force generated by the primary winding current, the magnetomotive force generated by the secondary winding current, the magnetomotive force generated by the DC winding current, the mutual inductance reluctance, the branch reluctance, the primary winding reluctance, and the secondary winding reluctance can be determined to form a magnetic circuit model.

[0076] As can be seen from the above technical solution, this embodiment provides an optional way to construct the magnetic circuit model of the magnetically controlled transformer based on the transformer type and design scheme of the magnetically controlled transformer. Through the above method, each magnetomotive force and each resistance can be determined based on the transformer type and design scheme, so as to better construct the magnetic circuit model.

[0077] In some embodiments of this application, the process of calculating the parameter values ​​of each magnetoelectric parameter of the magnetically controlled transformer based on the magnetic circuit model is described in detail, and the steps are as follows:

[0078] S20. Based on the magnetic circuit model, obtain the functional relationships corresponding to each magnetoelectric parameter of the magnetically controlled transformer.

[0079] Specifically, by combining the magnetic circuit model and the equivalent circuit of an ideal transformer, the functional relationships corresponding to each magnetoelectric parameter of the magnetically controlled transformer can be constructed.

[0080] S21. Discretize each functional relationship, and based on the magnetic circuit electrical quantities in the magnetic circuit model, solve for the parameter values ​​of each magnetoelectric parameter of the magnetically controlled transformer.

[0081] Specifically, by discretizing the various functional relationships, the electrical quantities of each magnetic circuit of the magnetically controlled transformer can be substituted into the various functional relationships to calculate the parameter values ​​of each magnetoelectric parameter.

[0082] As can be seen from the above technical solution, this embodiment provides an optional method for the parameter values ​​of various magnetoelectric parameters. Through the above method, the functional relationship can be determined by further utilizing the equivalent circuit of an ideal transformer, which can further reduce the difficulty of constructing the equivalent circuit of a magnetically controlled transformer.

[0083] In some embodiments of this application, the process of obtaining the functional relationships corresponding to each magnetoelectric parameter of the magnetically controlled transformer based on the magnetic circuit model in step S20 is described in detail, and the steps are as follows:

[0084] S200. Based on the magnetic circuit model, obtain the leakage flux calculation function of the magnetically controlled transformer, wherein the leakage flux calculation function is constructed based on the typical equations of an ideal transformer and the typical Maxwell equations.

[0085] Specifically, the relationships between the various electrical quantities in the magnetic circuit model can be substituted into the typical equations of the ideal transformer and the typical Maxwell equations to obtain the leakage flux calculation function of the magnetically controlled transformer.

[0086] A typical set of equations for an ideal transformer can include the calculation functions for the induced electromotive force generated by the main magnetic flux in the primary winding, the induced electromotive force generated by the main magnetic flux in the secondary winding, the induced electromotive force generated by the leakage magnetic flux in the primary winding, the induced electromotive force generated by the leakage magnetic flux in the secondary winding, the primary current, the primary voltage, the secondary current, and the secondary voltage of the ideal transformer.

[0087] For example, the typical equations for an ideal transformer can be represented as follows:

[0088]

[0089]

[0090]

[0091]

[0092]

[0093]

[0094]

[0095]

[0096]

[0097] Z2′=k 2 Z2

[0098]

[0099]

[0100] in, Indicates the main magnetic flux The induced electromotive force generated in the primary winding Indicates the main magnetic flux The induced electromotive force generated in the secondary winding, ω represents the angular frequency, N1 represents the number of turns in the primary winding, N2 represents the number of turns in the secondary winding, and k represents the turns ratio of the magnetically controlled transformer. Indicates the primary side leakage flux The generated induced electromotive force. Indicates secondary side leakage flux The generated induced electromotive force. Indicates the primary side leakage flux The generated induced current, Indicates secondary side leakage flux The generated induced current, X σ1 X represents the primary reluctance. σ2 Indicates the secondary reluctance. Represents the primary voltage. Z1 represents the primary-side leakage impedance, and Z2 represents the secondary-side leakage impedance. This represents the induced electromotive force calculated from the secondary side's main magnetic flux after the charge on the secondary side is converted to the primary side. Z' represents the secondary side main magnetic flux-induced current after the charge on the secondary side is referred back to the primary side, and Z'2 represents the secondary side leakage impedance after the charge on the secondary side is referred back to the primary side. Z represents the total transformer current after the charge on the secondary side is converted to the charge on the primary side.m The total impedance of the transformer after the charge on the secondary side is converted to the primary side; j represents the imaginary part.

[0101] Different magnetic circuit models result in different leakage flux calculation functions.

[0102] Taking a double-winding transformer with a core column as an example, the leakage flux calculation function can be shown below:

[0103] F dc +H1l1-Φ L1 R L1 +H c l c =0

[0104] -F1+Φ L1 R L1 -Φ L2 R L2 =0

[0105] F2+Φ L2 R L2 =0

[0106] F1-F2+F dc +H2l2-H c l c =0

[0107] H1l1 + H2l2 = 0

[0108] F1 = N1i1(t)

[0109] F2=N2i2(t)

[0110] F dc =N dc I dc

[0111] Where F1 represents the magnetomotive force generated by the primary winding current, and F2 represents the magnetomotive force generated by the secondary winding current. dc Φ represents the magnetomotive force generated by the DC winding current. L1 Φ represents the leakage flux generated by the primary winding current. L2 H1l1 represents the leakage flux generated by the secondary winding current, H2l2 represents the magnetic voltage drop of the left core branch, and H represents the magnetic voltage drop of the right core branch. c l c R represents the magnetic voltage drop across the core column. L1 R represents the resistance of the primary winding. L2 Let it represent the resistance of the secondary winding, i1(t) represent the induced current per unit number of turns in the primary winding, and i2(t) represent the induced current per unit number of turns in the secondary winding. dc N represents the induced current per unit number of turns generated by the DC winding.dc N1 represents the number of turns in the primary winding, and N2 represents the number of turns in the secondary winding.

[0112] H1l1, H2l2 and H c l c It can be determined based on the core cross-sectional area, magnetic circuit length, magnetic material type, and magnetization curve.

[0113] S201. Based on the magnetic circuit model, obtain the voltage calculation function of the magnetically controlled transformer. The voltage calculation function is constructed based on the typical electromagnetic field equations.

[0114] Specifically, the relationships between the various electrical quantities in the magnetic circuit model can be substituted into the typical electromagnetic field equations to obtain the voltage calculation function of the magnetically controlled transformer.

[0115] Different magnetic circuit models result in different voltage calculation functions.

[0116] Taking a double-winding transformer with a core column as an example, the voltage calculation function can be shown below:

[0117]

[0118]

[0119] Where v1 represents the primary voltage, v2 represents the secondary voltage, r1 represents the primary copper loss resistance, r2 represents the secondary copper loss resistance, i1 represents the induced current per unit turns of the primary winding, i2 represents the induced current per unit turns of the secondary winding, and L l1 Indicates the original edge leakage inductance, L l2 Indicates secondary side leakage. The derivative of the induced current per unit number of turns in the primary winding. The derivative of the induced current per unit number of turns in the secondary winding. N1 represents the derivative of the transformer leakage flux, N2 represents the number of turns in the primary winding, and N2 represents the number of turns in the secondary winding.

[0120] As can be seen from the above technical solution, this embodiment provides an optional way to obtain the functional relationships corresponding to each magnetoelectric parameter of the magnetically controlled transformer based on the magnetic circuit model. Through the above method, leakage flux calculation function and voltage calculation function can be obtained by obtaining the magnetic circuit model, so as to better complete the voltage and flux calculation.

[0121] In some embodiments of this application, the process of discretizing each functional relationship and solving for the parameter values ​​of each magnetoelectric parameter of the magnetically controlled transformer based on the magnetic circuit electrical quantities in the magnetic circuit model is described in detail. The steps are as follows:

[0122] S210. Discretize the functional relationship and, based on the magnetic circuit electrical quantities in the magnetic circuit model, solve for the leakage flux generated by the primary current, the leakage flux generated by the secondary current, the primary voltage, and the secondary voltage of the magnetically controlled transformer.

[0123] Specifically, the leakage flux calculation function and voltage calculation function can be discretized, and each magnetic circuit electrical quantity can be substituted into the discretized leakage flux calculation function and voltage calculation function to solve for the leakage flux generated by the primary current, the leakage flux generated by the secondary current, the primary voltage and the secondary voltage of the magnetically controlled transformer.

[0124] As can be seen from the above technical solution, this embodiment provides an optional method for calculating the values ​​of various parameters. Through the above method, the leakage flux generated by the primary current, the leakage flux generated by the secondary current, the primary voltage, and the secondary voltage of the magnetically controlled transformer can be calculated, thereby better completing the equivalent circuit and improving the accuracy of this application.

[0125] In some embodiments of this application, the process of constructing the equivalent circuit of the magnetically controlled transformer based on the magnetic circuit model and various parameter values ​​in step S3 is described in detail, and the steps are as follows:

[0126] S30. Based on the various parameter values, the magnetomotive force of the nonlinear magnetic circuit part in the magnetic circuit model is equivalent to a voltage-controlled current source, and the magnetomotive force of the primary winding and the secondary winding in the magnetic circuit model are equivalent to a current-controlled voltage source, forming the equivalent circuit of the magnetically controlled transformer.

[0127] Specifically, the parameter values ​​may include the leakage flux generated by the primary current, the leakage flux generated by the secondary current, the primary voltage, and the secondary voltage.

[0128] The magnitude of the corresponding voltage-controlled current source or current-controlled voltage source can be calculated based on the leakage flux generated by the primary current, the leakage flux generated by the secondary current, the primary voltage, the secondary voltage, and each magnetomotive force.

[0129] The magnetomotive force of the nonlinear magnetic circuit part in the magnetic circuit model can be equivalent to a voltage-controlled current source of corresponding value, and the magnetomotive force of the primary winding and the magnetomotive force of the secondary winding in the magnetic circuit model can be equivalent to a current-controlled voltage source of corresponding value.

[0130] For example, Figure 2 It can be one type of magnetic circuit model, which will Figure 2 In the magnetic circuit model, the magnetomotive force of the nonlinear magnetic circuit component is equivalent to a voltage-controlled current source of corresponding values. Furthermore, the magnetomotive forces of the primary and secondary windings in the magnetic circuit model are equivalent to current-controlled voltage sources of corresponding values. This allows us to obtain... Figure 3 .

[0131] As can be seen from the above technical solution, this embodiment provides an equivalent circuit construction method based on parameter values ​​and magnetic circuit models. The above method can better utilize parameter values ​​and magnetic circuit models to generate equivalent circuits and strengthen the correlation between various electromagnetic values ​​and equivalent circuits.

[0132] Next, we will combine Figure 4 The equivalent circuit construction device for a magnetically controlled transformer provided in this application will be described in detail. The equivalent circuit construction device for a magnetically controlled transformer provided below can be compared with the equivalent circuit construction method for a magnetically controlled transformer provided above.

[0133] See Figure 4 It can be observed that the equivalent circuit construction device for a magnetically controlled transformer may include:

[0134] Module 10 is used to build the magnetic circuit model of the magnetically controlled transformer;

[0135] The calculation module 20 is used to calculate the parameter values ​​of each magnetoelectric parameter of the magnetically controlled transformer based on the magnetic circuit model.

[0136] Module 30 is used to construct the equivalent circuit of the magnetically controlled transformer based on the magnetic circuit model and various parameter values.

[0137] Build modules can include:

[0138] The magnetic circuit model construction unit is used to construct the magnetic circuit model of the magnetically controlled transformer based on the transformer type and design scheme of the magnetically controlled transformer.

[0139] Build modules can include:

[0140] The first magnetic circuit model construction subunit is used to obtain the magnetomotive force generated by the primary winding current, the magnetomotive force generated by the secondary winding current, the magnetomotive force generated by the DC winding current, the mutual inductance reluctance, and the branch reluctance based on the design scheme.

[0141] The second magnetic circuit model construction subunit is used to obtain the primary winding magnetic reluctance and secondary winding magnetic reluctance of the magnetically controlled transformer based on the transformer type and design scheme of the magnetically controlled transformer.

[0142] The third magnetic circuit model construction subunit is used to determine, based on the design scheme, the combination of the magnetomotive force generated by the primary winding current, the magnetomotive force generated by the secondary winding current, the magnetomotive force generated by the DC winding current, the mutual inductance reluctance, the branch reluctance, the primary winding reluctance and the secondary winding reluctance, and to form a magnetic circuit model.

[0143] The calculation module may include:

[0144] The function relationship acquisition unit is used to acquire the function relationships corresponding to each magnetoelectric parameter of the magnetically controlled transformer based on the magnetic circuit model.

[0145] The parameter value solving unit is used to discretize each functional relationship and solve for the parameter values ​​of each magnetoelectric parameter of the magnetically controlled transformer based on the magnetic circuit electrical quantities in the magnetic circuit model.

[0146] The unit for obtaining functional relationships may include:

[0147] The first functional relational acquisition subunit is used to obtain the leakage flux calculation function of the magnetically controlled transformer based on the magnetic circuit model, wherein the leakage flux calculation function is constructed based on the typical equations of an ideal transformer and the typical Maxwell equations.

[0148] The second functional relationship acquisition subunit is used to obtain the voltage calculation function of the magnetically controlled transformer based on the magnetic circuit model. The voltage calculation function is constructed based on the typical electromagnetic field equations.

[0149] The parameter value solving unit may include:

[0150] The voltage calculation subunit is used to discretize the functional relationship and, based on the magnetic circuit electrical quantities in the magnetic circuit model, solve for the leakage flux generated by the primary current, the leakage flux generated by the secondary current, the primary voltage, and the secondary voltage of the magnetically controlled transformer.

[0151] The modules that can be used may include:

[0152] An equivalent circuit generation unit is used to convert the magnetomotive force of the nonlinear magnetic circuit part in the magnetic circuit model into a voltage-controlled current source based on various parameter values, and to convert the magnetomotive force of the primary winding and the magnetomotive force of the secondary winding in the magnetic circuit model into a current-controlled voltage source, thereby forming the equivalent circuit of the magnetically controlled transformer.

[0153] The magnetically controlled transformer equivalent circuit construction device provided in this application embodiment can be applied to magnetically controlled transformer equivalent circuit construction equipment, such as PC terminals, cloud platforms, servers, and server clusters. Optionally, Figure 5 The hardware structure block diagram of the device is shown, for reference Figure 5 The hardware structure of the magnetically controlled transformer equivalent circuit construction device may include: at least one processor 1, at least one communication interface 2, at least one memory 3 and at least one communication bus 4;

[0154] In this embodiment of the application, the number of processor 1, communication interface 2, memory 3, and communication bus 4 is at least one, and processor 1, communication interface 2, and memory 3 communicate with each other through communication bus 4;

[0155] Processor 1 may be a central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement embodiments of the present invention.

[0156] Memory 3 may include high-speed RAM, and may also include non-volatile memory, such as at least one disk storage device;

[0157] The memory stores a program, which the processor can call. The program is used for:

[0158] A magnetic circuit model of a magnetically controlled transformer is constructed, which is used to determine the relationship between the electrical quantities of each magnetic circuit.

[0159] Based on the magnetic circuit model, the parameter values ​​of each magnetoelectric parameter of the magnetically controlled transformer are calculated;

[0160] Based on the magnetic circuit model and the values ​​of each parameter, the equivalent circuit of the magnetically controlled transformer is constructed.

[0161] Optionally, the refined and extended functions of the program can be referred to the above description.

[0162] This application embodiment also provides a readable storage medium that can store a program suitable for execution by a processor, the program being used for:

[0163] A magnetic circuit model of a magnetically controlled transformer is constructed, which is used to determine the relationship between the electrical quantities of each magnetic circuit.

[0164] Based on the magnetic circuit model, the parameter values ​​of each magnetoelectric parameter of the magnetically controlled transformer are calculated;

[0165] Based on the magnetic circuit model and the values ​​of each parameter, the equivalent circuit of the magnetically controlled transformer is constructed.

[0166] Optionally, the refined and extended functions of the program can be referred to the above description.

[0167] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0168] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0169] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. The various embodiments of this application can be combined with each other. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for constructing an equivalent circuit of a magnetically controlled transformer, characterized in that, include: A magnetic circuit model of a magnetically controlled transformer is constructed, which is used to determine the relationship between the electrical quantities of each magnetic circuit. Based on the magnetic circuit model, the parameter values ​​of each magnetoelectric parameter of the magnetically controlled transformer are calculated; Based on the magnetic circuit model and the values ​​of each parameter, the equivalent circuit of the magnetically controlled transformer is constructed. The step of calculating the parameter values ​​of each magnetoelectric parameter of the magnetically controlled transformer based on the magnetic circuit model includes: Based on the magnetic circuit model, obtain the functional relationships corresponding to each magnetoelectric parameter of the magnetically controlled transformer; Discretize each functional relationship, and based on the magnetic circuit electrical quantities in the magnetic circuit model, solve for the parameter values ​​of each magnetoelectric parameter of the magnetically controlled transformer; The step of obtaining the functional relationships corresponding to each magnetoelectric parameter of the magnetically controlled transformer based on the magnetic circuit model includes: Based on the magnetic circuit model, the leakage flux calculation function of the magnetically controlled transformer is obtained, wherein the leakage flux calculation function is constructed based on the typical equations of an ideal transformer and the typical Maxwell equations. Based on the magnetic circuit model, the voltage calculation function of the magnetically controlled transformer is obtained, and the voltage calculation function is constructed based on the typical electromagnetic field equations. The construction of the equivalent circuit of the magnetically controlled transformer based on the magnetic circuit model and various parameter values ​​includes: Based on the various parameter values, the magnetomotive force of the nonlinear magnetic circuit part in the magnetic circuit model is equivalent to a voltage-controlled current source, and the magnetomotive force of the primary winding and the secondary winding in the magnetic circuit model are equivalent to a current-controlled voltage source, thus forming the equivalent circuit of the magnetically controlled transformer.

2. The method for constructing the equivalent circuit of a magnetically controlled transformer according to claim 1, characterized in that, The construction of the magnetic circuit model for the magnetically controlled transformer includes: Based on the transformer type and design scheme of the magnetically controlled transformer, a magnetic circuit model of the magnetically controlled transformer is constructed.

3. The method for constructing the equivalent circuit of a magnetically controlled transformer according to claim 2, characterized in that, The construction of the magnetic circuit model of the magnetically controlled transformer based on the transformer type and design scheme includes: Based on the design scheme, the magnetomotive force generated by the primary winding current, the magnetomotive force generated by the secondary winding current, the magnetomotive force generated by the DC winding current, the mutual inductance reluctance, and the branch reluctance of the magnetically controlled transformer are obtained. Based on the transformer type and design scheme of the magnetically controlled transformer, the magnetic reluctance of the primary winding and the magnetic reluctance of the secondary winding of the magnetically controlled transformer are obtained. Based on the design scheme, the combination of the magnetomotive force generated by the primary winding current, the magnetomotive force generated by the secondary winding current, the magnetomotive force generated by the DC winding current, the mutual inductance reluctance, the branch reluctance, the primary winding reluctance and the secondary winding reluctance of the magnetically controlled transformer are determined to form a magnetic circuit model.

4. The method for constructing the equivalent circuit of a magnetically controlled transformer according to claim 1, characterized in that, Discretize each functional relationship, and based on the magnetic circuit electrical quantities in the magnetic circuit model, solve for the parameter values ​​of each magnetoelectric parameter of the magnetically controlled transformer, including: Discretize the functional relationship, and based on the magnetic circuit electrical quantities in the magnetic circuit model, solve for the leakage flux generated by the primary current, the leakage flux generated by the secondary current, the primary voltage, and the secondary voltage of the magnetically controlled transformer.

5. A device for constructing an equivalent circuit of a magnetically controlled transformer, characterized in that, The apparatus is used to implement the various steps of the method for constructing the equivalent circuit of a magnetically controlled transformer as described in claim 1, and the apparatus includes: A construction module is used to construct a magnetic circuit model of a magnetically controlled transformer, wherein the magnetic circuit model is used to determine the relationship between the electrical quantities of each magnetic circuit; The calculation module is used to calculate the parameter values ​​of each magnetoelectric parameter of the magnetically controlled transformer based on the magnetic circuit model. The module is used to construct the equivalent circuit of the magnetically controlled transformer based on the magnetic circuit model and various parameter values.

6. A device for constructing an equivalent circuit of a magnetically controlled transformer, characterized in that, Including memory and processor; The memory is used to store programs; The processor is used to execute the program to implement each step of the method for constructing the equivalent circuit of a magnetically controlled transformer as described in any one of claims 1-4.

7. A storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements each step of the method for constructing the equivalent circuit of a magnetically controlled transformer as described in any one of claims 1-4.

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