System and method for designing and processing physical model of capacitive voltage transformer for dynamic simulation test

Abstract

The invention discloses a system and a method for designing and processing a physical model of a capacitive voltage transformer for a dynamic simulation test, and belongs to the technical field of physical dynamic simulation tests of power systems. The system comprises a CVT internal structure and appearance design unit for testing, which is used for determining parameters of the internal structure and the appearance of the CVT; the capacitive voltage divider parameter calculation unit is used for calculating key parameters according to on-site CVT body parameters; the electromagnetic unit parameter calculation unit is used for determining electromagnetic unit parameters; the intermediate transformer design unit is used for determining the structure and electrical parameters of the intermediate transformer; the compensation reactor design unit is used for determining the structure and electrical parameters of the compensation reactor; and the modeling unit is used for building a physical model of the capacitive voltage transformer for the dynamic simulation test. The method can be suitable for large, medium and small test models, and provides a basis for related test verification.

Description

Technical Field

[0001] This invention relates to the field of power system physical dynamic simulation test technology, and more specifically, to a system and method for designing and fabricating physical models of capacitive voltage transformers for dynamic simulation tests. Background Technology

[0002] In ultra-high voltage or extra-high voltage transmission lines, capacitive voltage transformers (CVTs) are typically used as voltage transformation elements due to economic and technical reasons, outputting lower voltages for protection and measurement components. Various protection devices connected to the power system must adapt to the dynamic response characteristics of CVTs to ensure correct operation when system faults occur. With the development of new power technologies and in-depth research on CVTs, the impact of CVT transient processes on the operational characteristics of protection device algorithms is receiving increasing attention. To meet the protection and detection requirements of CVT transient processes and ensure the safe and stable operation of protection devices in practical engineering applications, it is necessary to design a physical model of the CVT in conjunction with dynamic model testing conditions. This is of great significance for the testing and detection of relay protection devices. Summary of the Invention

[0003] To address the above problems, this invention proposes a system for designing and fabricating a physical model of a capacitive voltage transformer for dynamic model testing, comprising:

[0004] Test CVT internal structure and appearance design unit, used to determine the parameters of CVT internal structure and appearance;

[0005] The capacitor voltage divider parameter calculation unit is used to calculate key parameters based on the on-site CVT body parameters.

[0006] Electromagnetic unit parameter calculation unit, used to determine electromagnetic unit parameters;

[0007] Intermediate transformer design unit, used to determine the structure and electrical parameters of the intermediate transformer;

[0008] The compensation reactor design unit is used to determine the structure and electrical parameters of the compensation reactor;

[0009] The modeling unit is used to build a physical model of the capacitive voltage transformer for dynamic model testing based on the parameters of the internal structure and appearance of the CVT, the key parameters, the electromagnetic unit parameters, the structure and electrical parameters of the intermediate transformer, and the structure and electrical parameters of the compensation reactor.

[0010] Optional parameters for the CVT's internal structure and appearance include:

[0011] External parameters of the insulating bushing, enclosure parameters, medium voltage section parameters, internal parameters of the thin film capacitor, appearance parameters of the intermediate transformer, and appearance parameters of the compensating reactor.

[0012] Optional, key parameters include:

[0013] Voltage divider ratio and capacitance value parameters.

[0014] Optionally, electromagnetic unit parameters are used to determine the electromagnetic response of the CVT under fault conditions.

[0015] Optional electrical parameters for the intermediate transformer include:

[0016] Transformer ratio parameters, output capacity parameters, core magnetic flux density parameters, and core material parameters.

[0017] Optional electrical parameters of the compensating reactor include:

[0018] Reactance parameters, core material parameters, and core magnetic flux density parameters.

[0019] Optionally, a physical model of a capacitive voltage transformer for dynamic model testing can be used. By using a compensating reactor, the frequency response of the physical model can be adjusted to provide test and detection conditions for relay protection devices.

[0020] Furthermore, this invention also proposes a method for designing and fabricating a physical model of a capacitive voltage transformer for dynamic model testing, comprising:

[0021] Determine the parameters of the CVT's internal structure and appearance;

[0022] Calculate key parameters based on the on-site CVT body parameters;

[0023] Determine the parameters of the electromagnetic unit;

[0024] Determine the structure and electrical parameters of the intermediate transformer;

[0025] Determine the structure and electrical parameters of the compensating reactor;

[0026] Based on the parameters of the internal structure and appearance of the CVT, the key parameters, the electromagnetic unit parameters, the structure and electrical parameters of the intermediate transformer, and the structure and electrical parameters of the compensation reactor, a physical model of the capacitive voltage transformer for dynamic model testing is constructed.

[0027] Optional parameters for the CVT's internal structure and appearance include:

[0028] External parameters of the insulating bushing, enclosure parameters, medium voltage section parameters, internal parameters of the thin film capacitor, appearance parameters of the intermediate transformer, and appearance parameters of the compensating reactor.

[0029] Optional, key parameters include:

[0030] Voltage divider ratio and capacitance value parameters.

[0031] Optionally, electromagnetic unit parameters are used to determine the electromagnetic response of the CVT under fault conditions.

[0032] Optional electrical parameters for the intermediate transformer include:

[0033] Transformer ratio parameters, output capacity parameters, core magnetic flux density parameters, and core material parameters.

[0034] Optional electrical parameters of the compensating reactor include:

[0035] Reactance parameters, core material parameters, and core magnetic flux density parameters.

[0036] Optionally, a physical model of a capacitive voltage transformer for dynamic model testing can be used. By using a compensating reactor, the frequency response of the physical model can be adjusted to provide test and detection conditions for relay protection devices.

[0037] In another aspect, the present invention also provides a computing device, comprising: one or more processors;

[0038] A processor is used to execute one or more programs;

[0039] When the one or more programs are executed by the one or more processors, the method described above is implemented.

[0040] In another aspect, the present invention also provides a computer-readable storage medium having a computer program stored thereon, which, when executed, implements the method described above.

[0041] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0042] This invention proposes a system for designing and fabricating a physical model of a capacitive voltage transformer (CVT) for dynamic model testing. The system includes: a CVT internal structure and appearance design unit for determining parameters of the CVT's internal structure and appearance; a capacitive voltage divider parameter calculation unit for calculating key parameters based on the on-site CVT body parameters; an electromagnetic unit parameter calculation unit for determining electromagnetic unit parameters; an intermediate transformer design unit for determining the structure and electrical parameters of the intermediate transformer; a compensation reactor design unit for determining the structure and electrical parameters of the compensation reactor; and a modeling unit for constructing a physical model of the capacitive voltage transformer for dynamic model testing based on the CVT internal structure and appearance parameters, the key parameters, the electromagnetic unit parameters, the structure and electrical parameters of the intermediate transformer, and the structure and electrical parameters of the compensation reactor. This invention is applicable to large, medium, and small-sized test models and provides a basis for related experimental verification. Attached Figure Description

[0043] Figure 1 This is a structural diagram of the system of the present invention;

[0044] Figure 2 This is a flowchart illustrating the calculation of transformer inter-turn short-circuit current in an embodiment of the present invention.

[0045] Figure 3 This is a diagram showing the internal structure and external appearance of a capacitive voltage transformer according to an embodiment of the present invention.

[0046] Figure 4 This is an electrical schematic diagram of a capacitive voltage transformer according to an embodiment of the present invention;

[0047] Figure 5 This is a design outline drawing of the capacitive voltage transformer in an embodiment of the present invention;

[0048] Figure 6 This is a flowchart of the method of the present invention. Detailed Implementation

[0049] Exemplary embodiments of the invention will now be described with reference to the accompanying drawings. However, the invention may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided to fully and completely disclose the invention and to fully convey its scope to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the drawings is not intended to limit the invention. In the drawings, the same units / elements are referred to by the same reference numerals.

[0050] Unless otherwise stated, the terms used herein (including technical terms) have their common meaning as understood by one of ordinary skill in the art. Furthermore, it is understood that terms defined in commonly used dictionaries should be understood to have a meaning consistent with the context of their relevant field, and not to be interpreted as having an idealized or overly formal meaning.

[0051] Example 1:

[0052] Currently, the accuracy of digital simulation results depends entirely on the precision of the mathematical models of the components. For some complex physical processes, such as the electromagnetic transient process under electromagnetic coupling component failure, modeling is difficult and unavoidable errors exist. For grid connection testing of relay protection devices, in order to accurately assess the operational reliability of the protection device under transient transmission conditions of capacitive voltage transformers, it is urgent to conduct accurate experimental simulation of the electrical characteristics of capacitive voltage transformers. Therefore, this invention aims to construct an accurate physical model of a capacitive voltage transformer to realistically reproduce the transmission characteristics of the capacitive voltage transformer during electromagnetic coupling under fault conditions, thus overcoming the problem of insufficient accuracy in digital simulation modeling, providing high-fidelity test conditions for relay protection devices, and improving the accuracy and reliability of their operational behavior assessment under complex fault conditions.

[0053] To address the aforementioned problems in existing technologies, this invention obtains the design parameters and electrical parameters of the field capacitive voltage transformer, and then, in conjunction with actual operating conditions, designs and calculates the structure and electrical parameters of the physical model.

[0054] Based on this:

[0055] This invention proposes a system 100 for designing and fabricating a physical model of a capacitive voltage transformer for dynamic model testing, such as... Figure 1 As shown, it includes:

[0056] Test CVT internal structure and appearance design unit 101, used to determine the parameters of CVT internal structure and appearance;

[0057] The capacitor voltage divider parameter calculation unit 102 is used to calculate key parameters based on the on-site CVT body parameters.

[0058] Electromagnetic unit parameter calculation unit 103 is used to determine electromagnetic unit parameters;

[0059] Intermediate transformer design unit 104 is used to determine the structure and electrical parameters of the intermediate transformer;

[0060] Compensating reactor design unit 105 is used to determine the structure and electrical parameters of the compensating reactor;

[0061] Modeling unit 106 is used to build a physical model of a capacitive voltage transformer for dynamic model testing based on the parameters of the internal structure and appearance of the CVT, the key parameters, the electromagnetic unit parameters, the structure and electrical parameters of the intermediate transformer, and the structure and electrical parameters of the compensation reactor.

[0062] The parameters of the CVT's internal structure and appearance include:

[0063] External parameters of the insulating bushing, enclosure parameters, medium voltage section parameters, internal parameters of the thin film capacitor, appearance parameters of the intermediate transformer, and appearance parameters of the compensating reactor.

[0064] Key parameters include:

[0065] Voltage divider ratio and capacitance value parameters.

[0066] Among them, the electromagnetic unit parameters are used to determine the electromagnetic response of the CVT under fault conditions.

[0067] The electrical parameters of the intermediate transformer include:

[0068] Transformer ratio parameters, output capacity parameters, core magnetic flux density parameters, and core material parameters.

[0069] The electrical parameters of the compensating reactor include:

[0070] Reactance parameters, core material parameters, and core magnetic flux density parameters.

[0071] Among them, the physical model of the capacitive voltage transformer used in the dynamic model test adjusts the frequency response of the physical model through the compensation reactor, which provides the test and detection conditions for the relay protection device.

[0072] The internal structure and appearance design unit of the CVT used in the test includes an external insulating sleeve, a housing, a medium-voltage section, and an internal thin-film capacitor, an intermediate transformer, and a compensating reactor.

[0073] The capacitive voltage divider parameter calculation unit includes a primary and secondary voltage determination unit for the capacitive voltage transformer used in the test system, a capacity determination unit, and a unit for calculating the number and parameters of the voltage divider capacitor modules. This unit accurately calculates key parameters such as the voltage division ratio and capacitance value based on the on-site CVT design parameters, ensuring that the accuracy of the physical model in voltage transformation matches that of the actual equipment.

[0074] The electromagnetic unit parameter calculation unit includes a load capacity calculation unit for the capacitive voltage transformer used in the test system. The electromagnetic unit parameter calculation unit focuses on the simulation of the electromagnetic coupling process. By deeply analyzing the electromagnetic transient characteristics, it calculates various parameters of the electromagnetic unit to truly reflect the electromagnetic response of the CVT under fault conditions.

[0075] The intermediate transformer design unit includes units for determining the transformer's turns ratio, output capacity, core magnetic flux density, and core material. This unit is responsible for designing the intermediate transformer's structure and electrical parameters based on the calculated electromagnetic unit parameters, ensuring it performs correct voltage transformation and isolation within the entire physical model.

[0076] The compensation reactor design unit includes units for determining reactor reactance parameters, core material, and core magnetic flux density. This unit designs suitable compensation reactors based on the transient characteristics of the CVT to adjust the frequency response of the physical model, making it closer to the dynamic behavior of the actual CVT. Through the collaborative work of these four units, a highly accurate CVT physical model is constructed, providing reliable and high-fidelity test conditions for the testing and detection of relay protection devices.

[0077] The design method of the above system is as follows:

[0078] 1) Determine the internal structure and appearance design units of the CVT used for testing, including the external insulating bushings, housing, medium voltage section, and internal thin film capacitors, intermediate transformers, and compensating reactors;

[0079] 2) Determine the parameter calculation unit for the capacitive voltage divider, including the primary and secondary voltage values ​​of the capacitive voltage transformer used in the test system, the model capacity, the number of voltage divider capacitor modules and their parameter calculation methods, and accurately calculate key parameters such as the voltage division ratio and capacitance value.

[0080] 3) Determine the electromagnetic unit parameter calculation unit, the load capacity calculation unit of the capacitive voltage transformer used in the test system, calculate the various parameters of the electromagnetic unit, and calculate the electromagnetic transient characteristics under the influence of electromagnetic coupling parameters.

[0081] 4) Determine the intermediate transformer design unit, including the units for determining the intermediate transformer's turns ratio, output capacity, core magnetic flux density, and core material. Design the structural and electrical parameters of the intermediate transformer to ensure it performs its correct voltage transformation and isolation functions within the entire physical model.

[0082] 5) Determine the design unit for the compensation reactor, including the reactor reactance parameters, core material, and core magnetic flux density determination unit. Design a suitable compensation reactor to adjust the frequency response of the physical model to better reflect the dynamic behavior of the actual CVT.

[0083] A method and system for designing a physical model of a capacitive voltage transformer for dynamic model testing, wherein the calculation method includes: a capacitive voltage divider parameter calculation unit, an electromagnetic unit parameter calculation unit, an intermediate transformer design unit, and a compensation reactor design unit.

[0084] The test CVT internal structure and appearance design unit includes external insulating bushings, housing, medium voltage section, and internal thin film capacitors, intermediate transformers, and compensating reactors;

[0085] The aforementioned capacitive voltage divider parameter calculation unit includes the primary and secondary voltage values ​​of the capacitive voltage transformer used in the test system, the model capacity, the number of voltage divider capacitor modules and parameter calculation methods, and accurately calculates key parameters such as the voltage division ratio and capacitance value.

[0086] The electromagnetic unit parameter calculation unit and the load capacity calculation unit of the capacitive voltage transformer used in the test system calculate various parameters of the electromagnetic unit and calculate the electromagnetic transient characteristics under the influence of electromagnetic coupling parameters.

[0087] The intermediate transformer design unit includes units for determining the transformer's turns ratio, output capacity, core magnetic flux density, and core material. It designs the intermediate transformer's structure and electrical parameters to ensure it performs correct voltage transformation and isolation functions within the overall physical model.

[0088] The aforementioned compensation reactor design unit includes units for determining reactor reactance parameters, core material, and core magnetic flux density. A suitable compensation reactor is designed to adjust the frequency response of the physical model, making it closer to the dynamic behavior of an actual CVT.

[0089] Another design approach for the system is as follows:

[0090] The internal structure and appearance design units of the CVT used for testing were determined to include the external insulating bushings, housing, medium voltage section, and internal thin film capacitors, intermediate transformers, and compensating reactors.

[0091] Determine the primary and secondary voltage values ​​of the capacitive voltage transformer used in the test system, and the model capacity;

[0092] Determine the number of voltage divider capacitor modules and the calculation method for their parameters, and accurately calculate key parameters such as the voltage division ratio and capacitance value.

[0093] Determine the load-carrying capacity calculation unit for the capacitive voltage transformer used in the test system, calculate various parameters of the electromagnetic unit, and calculate the electromagnetic transient characteristics under the influence of electromagnetic coupling parameters.

[0094] The unit determines the turns ratio, output capacity, core magnetic flux density, and core material of the intermediate transformer.

[0095] Design the structure and electrical parameters of the intermediate transformer to ensure that it plays a correct role in voltage transformation and isolation throughout the physical model.

[0096] Determine the reactor reactance parameters, core material, and core magnetic flux density.

[0097] Determine the appropriate compensation reactor and adjust the frequency response of the physical model to better reflect the dynamic behavior of an actual CVT.

[0098] The application of this invention greatly simplifies the internal structure of capacitive voltage transformers in engineering sites, can reflect the basic structural characteristics and electromagnetic transient characteristics of capacitive voltage transformers, and has high experimental reference value.

[0099] The following is a detailed implementation plan:

[0100] like Figure 2 As shown, the CVT ratio and capacity for the test are determined first;

[0101] like Figure 3 As shown, the external structural design of a capacitive voltage transformer includes an external insulating bushing, housing, medium-voltage section, and internal thin-film capacitors, intermediate transformers, and compensating reactors.

[0102] like Figure 4 The diagram shows the electrical schematic of a capacitive voltage transformer. The physical model of the capacitive voltage transformer used in the dynamic model test has a single-phase rated primary voltage U1 = 1.5 / √3kV = 866V, and an intermediate voltage Uc designed to be half the single-phase rated voltage, which is 433V. Its rated capacity for testing is 5VA.

[0103] like Figure 5 The figure shown is a design outline of a capacitive voltage transformer.

[0104] like Figure 2 As shown, determine the number of voltage divider capacitor modules and calculate their parameters;

[0105] When using two sets of voltage divider capacitors for voltage division, we have:

[0106]

[0107] In the formula, Kc is the voltage division ratio of the capacitor divider; the rated capacitance of each capacitor group is designed as C1: 0.3μF; C2: 0.3μF; if we only care about the characteristics of the output terminal of the capacitor divider, we can regard it as a two-terminal network with a source. From the voltage divider side, the parallel capacitive reactance Xc of the two capacitor groups is:

[0108]

[0109] Its internal impedance is very high, causing the output voltage at the intermediate voltage end to vary greatly with the load. Therefore, a reactor needs to be connected in series in the output circuit to compensate for the equivalent capacitive reactance, minimizing the internal impedance and improving performance. In this case, the connected intermediate transformer is an electromagnetic voltage transformer with a primary voltage equal to the intermediate voltage. The compensating reactor and the intermediate transformer constitute the main body of the electromagnetic unit.

[0110] At the rated frequency, the equivalent capacitance (C1+C2) and the capacitive reactance and inductive reactance of the compensating reactor inductance L are equal, which is a basic condition for the normal operation of a capacitive voltage transformer.

[0111] The error of a voltage transformer is actually the impedance voltage drop, and the impedance voltage formula is as follows:

[0112]

[0113] Voltage error of the load

[0114] Phase difference of the load

[0115] U R12 Resistance voltage (the ratio of voltage drop at rated load current to rated voltage);

[0116] U X12 Reactance voltage (the ratio of voltage drop at rated load current to rated voltage);

[0117] φ2 – Impedance angle of rated load;

[0118] S 2N --Rated secondary output capacity; R 12 - Short-circuit resistance; X 12 - Short-circuit leakage reactance.

[0119] like Figure 2 As shown, the load capacity calculation unit is determined;

[0120] Since the medium voltage UC is relatively low at 433V, according to the impedance voltage drop formula, the load capacity is proportional to U2. Therefore, the load capacity of TYD1.5 can reach the design value of 5VA.

[0121] The capacitor bank uses metallized polypropylene film, with a single rated capacitance of 1.8μF; rated voltage of AC 450V; and rated frequency of 50Hz.

[0122] like Figure 2 As shown, determine the electrical parameters of the intermediate transformer;

[0123] The intermediate transformer has the following rated primary phase voltages: 433V, 57.74V, 5VA, 50Hz, 1890V withstand voltage between primary and secondary coils, and 1890V withstand voltage to ground.

[0124] like Figure 2 As shown, determine the structural parameters of the intermediate transformer;

[0125] Under rated voltage, the magnetic flux density (magnetic induction intensity) is less than 0.5T; the core material is oriented silicon steel sheet (high magnetic core material with high linearity).

[0126] like Figure 2 As shown, determine the electrical parameters of the compensating reactor;

[0127] Compensating reactor rated current: 0.2A, reactance value: 16.89H, rated frequency: 50Hz;

[0128] like Figure 2 As shown, determine the structural parameters of the compensation reactor;

[0129] The core is a C-type core made of 30Q130 material (with good permeability and linearity), and the magnetic flux density is less than 0.5T at 1060V.

[0130] like Figure 2 The aforementioned processing of related thin-film capacitors, intermediate transformers, and compensating reactors can be used to conduct physical model prototype tests of capacitive voltage transformers.

[0131] Table 1 shows the measured parameters of the designed prototype capacitive voltage transformer model.

[0132] Table 1

[0133]

[0134] This invention is suitable for accurately assessing the operational reliability of protection devices under transient transmission conditions of capacitive voltage transformers. It provides accurate experimental simulation of the electrical characteristics of capacitive voltage transformers, enabling comprehensive and accurate calculation of a physical model of the accurately transmitting capacitive voltage transformer. This realistically reproduces the transmission characteristics of the capacitive voltage transformer during electromagnetic coupling under fault conditions, overcoming the limitations of digital simulation modeling accuracy. The capacitive voltage transformer designed using the above calculation method can provide high-fidelity test conditions for relay protection devices, improving the accuracy and reliability of their operational behavior assessment under complex fault conditions.

[0135] Example 2:

[0136] Furthermore, this invention also proposes a method S200 for designing and fabricating a physical model of a capacitive voltage transformer for dynamic model testing, such as... Figure 6 As shown, it includes:

[0137] S201, determine the parameters of the CVT's internal structure and appearance;

[0138] S202, calculate key parameters based on the on-site CVT body parameters;

[0139] S203, Determine the electromagnetic unit parameters;

[0140] S204, determine the structure and electrical parameters of the intermediate transformer;

[0141] S205, determine the structure and electrical parameters of the compensation reactor;

[0142] S206. Based on the parameters of the internal structure and appearance of the CVT, the key parameters, the electromagnetic unit parameters, the structure and electrical parameters of the intermediate transformer, and the structure and electrical parameters of the compensation reactor, a physical model of the capacitive voltage transformer for dynamic model testing is constructed.

[0143] The parameters of the CVT's internal structure and appearance include:

[0144] External parameters of the insulating bushing, enclosure parameters, medium voltage section parameters, internal parameters of the thin film capacitor, appearance parameters of the intermediate transformer, and appearance parameters of the compensating reactor.

[0145] Key parameters include:

[0146] Voltage divider ratio and capacitance value parameters.

[0147] Among them, the electromagnetic unit parameters are used to determine the electromagnetic response of the CVT under fault conditions.

[0148] The electrical parameters of the intermediate transformer include:

[0149] Transformer ratio parameters, output capacity parameters, core magnetic flux density parameters, and core material parameters.

[0150] The electrical parameters of the compensating reactor include:

[0151] Reactance parameters, core material parameters, and core magnetic flux density parameters.

[0152] Among them, the physical model of the capacitive voltage transformer used in the dynamic model test adjusts the frequency response of the physical model through the compensation reactor, which provides the test and detection conditions for the relay protection device.

[0153] This invention is applicable to large, medium and small experimental models and provides a basis for related experimental verification.

[0154] Example 3:

[0155] Based on the same inventive concept, this invention also provides a computer device, which includes a processor and a memory. The memory stores a computer program, which includes program instructions. The processor executes the program instructions stored in the computer storage medium. The processor may be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. It is the computing and control core of the terminal, suitable for implementing one or more instructions, specifically suitable for loading and executing one or more instructions in the computer storage medium to implement corresponding method flows or corresponding functions, thereby implementing the steps of the methods in the above embodiments.

[0156] Example 4:

[0157] Based on the same inventive concept, this invention also provides a storage medium, specifically a computer-readable storage medium (Memory), which is a memory device in a computer device used to store programs and data. It is understood that the computer-readable storage medium here can include both the built-in storage medium in the computer device and extended storage media supported by the computer device. The computer-readable storage medium provides storage space that stores the terminal's operating system. Furthermore, this storage space also stores one or more instructions suitable for loading and execution by a processor. These instructions can be one or more computer programs (including program code). It should be noted that the computer-readable storage medium here can be high-speed RAM or non-volatile memory, such as at least one disk storage device. The processor can load and execute one or more instructions stored in the computer-readable storage medium to implement the steps of the method in the above embodiments.

[0158] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code. The solutions in the embodiments of the present invention can be implemented using various computer languages, such as the object-oriented programming language Java and the interpreted scripting language JavaScript.

[0159] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0160] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0161] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0162] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0163] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A system for designing and fabricating a physical model of a capacitive voltage transformer for dynamic model testing, characterized in that, include: Test CVT internal structure and appearance design unit, used to determine the parameters of CVT internal structure and appearance; The capacitor voltage divider parameter calculation unit is used to calculate key parameters based on the on-site CVT body parameters. Electromagnetic unit parameter calculation unit, used to determine electromagnetic unit parameters; Intermediate transformer design unit, used to determine the structure and electrical parameters of the intermediate transformer; The compensation reactor design unit is used to determine the structure and electrical parameters of the compensation reactor; The modeling unit is used to build a physical model of the capacitive voltage transformer for dynamic model testing based on the parameters of the internal structure and appearance of the CVT, the key parameters, the electromagnetic unit parameters, the structure and electrical parameters of the intermediate transformer, and the structure and electrical parameters of the compensation reactor.

2. The system according to claim 1, characterized in that, The parameters of the CVT's internal structure and appearance include: External parameters of the insulating bushing, enclosure parameters, medium voltage section parameters, internal parameters of the thin film capacitor, appearance parameters of the intermediate transformer, and appearance parameters of the compensating reactor.

3. The method according to claim 1, characterized in that, The key parameters include: Voltage divider ratio and capacitance value parameters.

4. The method according to claim 1, characterized in that, The electromagnetic unit parameters are used to determine the electromagnetic response of the CVT under fault conditions.

5. The method according to claim 1, characterized in that, The electrical parameters of the intermediate transformer include: Transformer ratio parameters, output capacity parameters, core magnetic flux density parameters, and core material parameters.

6. The method according to claim 1, characterized in that, The electrical parameters of the compensating reactor include: Reactance parameters, core material parameters, and core magnetic flux density parameters.

7. The method according to claim 1, characterized in that, The physical model of the capacitive voltage transformer used in the dynamic model test adjusts the frequency response of the physical model through a compensating reactor to provide test and detection conditions for the relay protection device.

8. A method for designing and fabricating a physical model of a capacitive voltage transformer for dynamic model testing, characterized in that, include: Determine the parameters of the CVT's internal structure and appearance; Calculate key parameters based on the on-site CVT body parameters; Determine the parameters of the electromagnetic unit; Determine the structure and electrical parameters of the intermediate transformer; Determine the structure and electrical parameters of the compensating reactor; Based on the parameters of the internal structure and appearance of the CVT, the key parameters, the electromagnetic unit parameters, the structure and electrical parameters of the intermediate transformer, and the structure and electrical parameters of the compensation reactor, a physical model of the capacitive voltage transformer for dynamic model testing is constructed.

9. The method according to claim 8, characterized in that, The parameters of the CVT's internal structure and appearance include: External parameters of the insulating bushing, enclosure parameters, medium voltage section parameters, internal parameters of the thin film capacitor, appearance parameters of the intermediate transformer, and appearance parameters of the compensating reactor.

10. The method according to claim 8, characterized in that, The key parameters include: Voltage divider ratio and capacitance value parameters.

11. The method according to claim 8, characterized in that, The electromagnetic unit parameters are used to determine the electromagnetic response of the CVT under fault conditions.

12. The method according to claim 8, characterized in that, The electrical parameters of the intermediate transformer include: Transformer ratio parameters, output capacity parameters, core magnetic flux density parameters, and core material parameters.

13. The method according to claim 8, characterized in that, The electrical parameters of the compensating reactor include: Reactance parameters, core material parameters, and core magnetic flux density parameters.

14. The method according to claim 8, characterized in that, The physical model of the capacitive voltage transformer used in the dynamic model test adjusts the frequency response of the physical model through a compensating reactor to provide test and detection conditions for the relay protection device.

15. A computer device, characterized in that, include: One or more processors; A processor is used to execute one or more programs; When the one or more programs are executed by the one or more processors, the method described in any one of claims 8-14 is implemented.

16. A computer-readable storage medium, characterized in that, It contains a computer program, which, when executed, implements the method as described in any one of claims 8-14.

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