Method for selecting large generator core magnetization test equipment

Abstract

The application relates to a selection method and device of a large generator core magnetization test equipment, computer equipment, a computer readable storage medium and a computer program product, which can be used in the technical field of electric power. The method comprises the following steps: determining the excitation parameters of a generator according to preset turns of an excitation coil of the generator and core parameters of the generator; determining a maximum voltage value from a voltage value of the excitation coil and determining a maximum current value from a current value of the excitation coil; determining cable configuration information of the excitation coil according to the maximum voltage value and the maximum current value; determining a core loss value according to the core parameters, and determining a maximum core loss value from the core loss value; and determining device configuration information of the core magnetization test equipment of the generator according to the maximum core loss value, the maximum voltage value and the maximum current value. The method can improve the efficiency of determining the configuration information of the core magnetization test equipment of the generator.

Description

Technical Field

[0001] This application relates to the field of power technology, and in particular to a method, apparatus, computer equipment, computer-readable storage medium, and computer program product for selecting a large generator core magnetization test device. Background Technology

[0002] With the development of generator technology, the performance testing of generator cores has become increasingly important. Among these tests, generator core magnetization testing, as a key technology for verifying generator core performance, is crucial for ensuring the safe operation of generators. Therefore, efficiently determining the configuration information of generator core magnetization testing equipment has become an important research direction.

[0003] Traditional techniques typically rely on manual experience to estimate the configuration information of generator core magnetization test equipment. However, this method requires significant manual processing time, resulting in low efficiency in determining the configuration information of generator core magnetization test equipment. Summary of the Invention

[0004] Based on this, it is necessary to provide a method, apparatus, computer equipment, computer-readable storage medium, and computer program product for selecting a large generator core magnetization test device that can improve the efficiency of determining the configuration information of the generator core magnetization test device, in order to address the above-mentioned technical problems.

[0005] Firstly, this application provides a method for selecting a large generator core magnetization test device. The method includes:

[0006] The excitation parameters of the generator are determined based on the preset number of turns of the generator's excitation coil and the core parameters of the generator; the excitation parameters include the voltage value and the current value of the excitation coil.

[0007] The maximum voltage value is determined from the voltage value of the excitation coil, and the maximum current value is determined from the current value of the excitation coil;

[0008] Based on the maximum voltage value and the maximum current value, determine the cable configuration information of the excitation coil;

[0009] Based on the core parameters of the generator, determine the core loss value of the generator during the core magnetization test, and determine the maximum core loss value of the generator during the core magnetization test from the core loss value.

[0010] Based on the maximum core loss value, the maximum voltage value, and the maximum current value, the equipment configuration information of the generator core magnetization test equipment is determined.

[0011] In one embodiment, determining the excitation parameters of the generator based on a preset number of turns of the generator's excitation coil and the generator's core parameters includes:

[0012] From the core parameters of the generator, obtain the cross-sectional area of ​​the stator core yoke and the magnetic flux density of the stator core yoke of the generator.

[0013] The voltage value of the excitation coil is determined based on the frequency information of the test power supply, the cross-sectional area of ​​the stator core yoke, the magnetic flux density of the stator core yoke, the preset number of turns, and the preset coefficient.

[0014] From the core parameters of the generator, obtain the outer diameter of the stator core, the stator core yoke height, and the magnetic field strength of the silicon steel sheet of the generator at a preset magnetic flux density.

[0015] The current value of the excitation coil is determined based on the outer diameter of the stator core, the yoke height of the stator core, the magnetic field strength, and the preset number of turns.

[0016] In one embodiment, determining the cable configuration information of the excitation coil based on the maximum voltage value and the maximum current value includes:

[0017] Based on the maximum current value, determine the cable cross-section information of the excitation coil;

[0018] Based on the maximum voltage value, determine the cable insulation information of the excitation coil;

[0019] The reference length of the excitation coil is determined based on the preset number of turns, the length of the generator stator core, the outer diameter of the generator stator core, and the inner diameter of the generator stator core.

[0020] The target length of the excitation coil is determined based on the reference length; the target length is a preset multiple of the reference length.

[0021] Based on the cable cross-section information, the cable insulation information, and the target length, the cable configuration information of the excitation coil is generated.

[0022] In one embodiment, determining the core loss value of the generator during the core magnetization test based on the core parameters of the generator includes:

[0023] Obtain the density of the silicon steel sheets in the generator;

[0024] The mass information of the stator core yoke of the generator is determined based on the outer diameter of the stator core, the height of the stator core yoke, the cross-sectional area of ​​the stator core yoke, and the density of the silicon steel sheets.

[0025] When the generator is a salient-pole synchronous generator, the core loss value is determined based on the standard ratio loss of the stator core silicon steel sheet material of the generator under a first preset magnetic flux density and the mass information of the stator core yoke.

[0026] When the generator is a hydro-generator, the core loss value is determined based on the standard ratio loss of the stator core silicon steel sheet material under a second preset magnetic flux density and the mass information of the stator core yoke.

[0027] In one embodiment, the core magnetization test equipment includes an induction voltage regulator, a test transformer, a test power supply, and a first compensation capacitor bank; the first compensation capacitor bank is disposed at both ends of the excitation coil;

[0028] The process of determining the equipment configuration information of the generator core magnetization test equipment based on the maximum core loss value, the maximum voltage value, and the maximum current value includes:

[0029] Based on the maximum core loss value, determine the capacity configuration information of the induction voltage regulator, the capacity configuration information of the test transformer, and the capacity configuration information of the test power supply;

[0030] The rated voltage of the test transformer is determined based on the maximum voltage value.

[0031] The capacitance value of each capacitor in the first compensation capacitor group is determined based on the maximum voltage value, the maximum current value, the number of capacitors in the first compensation capacitor group, and the frequency information of the test power supply.

[0032] In one embodiment, the core magnetization test equipment further includes a second compensation capacitor bank; the second compensation capacitor bank is disposed on the input side of the test power supply;

[0033] The method further includes:

[0034] The capacitance value of each capacitor in the second compensation capacitor group is determined based on the maximum core loss value, the number of capacitors in the second compensation capacitor group, the frequency information of the test power supply, and the rated voltage of the test power supply.

[0035] Secondly, this application also provides a selection device for a large generator core magnetization test equipment. The device includes:

[0036] The first determining module is used to determine the excitation parameters of the generator based on the preset number of turns of the generator's excitation coil and the core parameters of the generator; the excitation parameters include the voltage value and the current value of the excitation coil.

[0037] The second determining module is used to determine the maximum voltage value from the voltage value of the excitation coil and the maximum current value from the current value of the excitation coil.

[0038] The third determining module is used to determine the cable configuration information of the excitation coil based on the maximum voltage value and the maximum current value;

[0039] The fourth determining module is used to determine the core loss value of the generator during the core magnetization test based on the core parameters of the generator, and to determine the maximum core loss value of the generator during the core magnetization test from the core loss value.

[0040] The fifth determining module is used to determine the equipment configuration information of the generator core magnetization test equipment based on the maximum core loss value, the maximum voltage value, and the maximum current value.

[0041] Thirdly, this application also provides a computer device. The computer device includes a memory and a processor, the memory storing a computer program, and the processor executing the computer program to perform the following steps:

[0042] The excitation parameters of the generator are determined based on the preset number of turns of the generator's excitation coil and the core parameters of the generator; the excitation parameters include the voltage value and the current value of the excitation coil.

[0043] The maximum voltage value is determined from the voltage value of the excitation coil, and the maximum current value is determined from the current value of the excitation coil;

[0044] Based on the maximum voltage value and the maximum current value, determine the cable configuration information of the excitation coil;

[0045] Based on the core parameters of the generator, determine the core loss value of the generator during the core magnetization test, and determine the maximum core loss value of the generator during the core magnetization test from the core loss value.

[0046] Based on the maximum core loss value, the maximum voltage value, and the maximum current value, the equipment configuration information of the generator core magnetization test equipment is determined.

[0047] Fourthly, this application also provides a computer-readable storage medium. The computer-readable storage medium stores a computer program thereon, which, when executed by a processor, performs the following steps:

[0048] The excitation parameters of the generator are determined based on the preset number of turns of the generator's excitation coil and the core parameters of the generator; the excitation parameters include the voltage value and the current value of the excitation coil.

[0049] The maximum voltage value is determined from the voltage value of the excitation coil, and the maximum current value is determined from the current value of the excitation coil;

[0050] Based on the maximum voltage value and the maximum current value, determine the cable configuration information of the excitation coil;

[0051] Based on the core parameters of the generator, determine the core loss value of the generator during the core magnetization test, and determine the maximum core loss value of the generator during the core magnetization test from the core loss value.

[0052] Based on the maximum core loss value, the maximum voltage value, and the maximum current value, the equipment configuration information of the generator core magnetization test equipment is determined.

[0053] Fifthly, this application also provides a computer program product. The computer program product includes a computer program that, when executed by a processor, performs the following steps:

[0054] The excitation parameters of the generator are determined based on the preset number of turns of the generator's excitation coil and the core parameters of the generator; the excitation parameters include the voltage value and the current value of the excitation coil.

[0055] The maximum voltage value is determined from the voltage value of the excitation coil, and the maximum current value is determined from the current value of the excitation coil;

[0056] Based on the maximum voltage value and the maximum current value, determine the cable configuration information of the excitation coil;

[0057] Based on the core parameters of the generator, determine the core loss value of the generator during the core magnetization test, and determine the maximum core loss value of the generator during the core magnetization test from the core loss value.

[0058] Based on the maximum core loss value, the maximum voltage value, and the maximum current value, the equipment configuration information of the generator core magnetization test equipment is determined.

[0059] The selection method, apparatus, computer equipment, computer-readable storage medium, and computer program product for the aforementioned large generator core magnetization test equipment determine the excitation parameters of the generator based on the preset number of turns of the generator's excitation coil and the generator's core parameters. The excitation parameters include the voltage and current values ​​of the excitation coil. A maximum voltage value is determined from the voltage values ​​of the excitation coil, and a maximum current value is determined from the current values ​​of the excitation coil. Cable configuration information for the excitation coil is determined based on the maximum voltage and maximum current values. The core loss value of the generator during the core magnetization test is determined based on the generator's core parameters, and the maximum core loss value during the core magnetization test is determined from the core loss value. Finally, the equipment configuration information for the generator's core magnetization test equipment is determined based on the maximum core loss value, the maximum voltage value, and the maximum current value. This scheme determines the excitation parameters by pre-setting the number of turns of the generator's excitation coil and combining them with the core parameters. Then, it determines the maximum voltage and maximum current values ​​based on the excitation parameters, which simplifies the calculation process and improves the accuracy of parameter determination. Next, it determines the cable configuration information based on the maximum voltage and maximum current values, and determines the maximum core loss value based on the core parameters. Finally, it comprehensively considers these parameters to determine the equipment configuration information, which helps to form an automated equipment selection process and thus improves the efficiency of determining the configuration information of the generator core magnetization test equipment. Attached Figure Description

[0060] To more clearly illustrate the technical solutions in the embodiments or related technologies of this application, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0061] Figure 1 This is a flowchart illustrating the selection method for a large generator core magnetization test device in one embodiment;

[0062] Figure 2 This is a flowchart illustrating the steps for determining the excitation parameters of a generator in one embodiment.

[0063] Figure 3 This is a schematic diagram of a generator stator core magnetization test in one embodiment;

[0064] Figure 4 This is a structural block diagram of the selection device for a large generator core magnetization test equipment in one embodiment;

[0065] Figure 5 This is an internal structural diagram of a computer device in one embodiment. Detailed Implementation

[0066] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0067] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of the relevant data must comply with relevant regulations.

[0068] In one exemplary embodiment, such as Figure 1 As shown, a method for selecting a large generator core magnetization test device is provided. This embodiment illustrates the method by applying it to a terminal. It is understood that this method can also be applied to a server, or to a system including both a terminal and a server, and is implemented through interaction between the terminal and the server. The terminal can be, but is not limited to, various personal computers, laptops, smartphones, tablets, etc.; the server can be a standalone physical server, a server cluster or distributed system composed of multiple physical servers, or a cloud server providing cloud computing services. In this embodiment, the method includes the following steps:

[0069] Step S101: Determine the excitation parameters of the generator based on the preset number of turns of the generator's excitation coil and the generator's core parameters; the excitation parameters include the voltage value and the current value of the excitation coil.

[0070] Step S102: Determine the maximum voltage value from the voltage value of the excitation coil, and determine the maximum current value from the current value of the excitation coil.

[0071] Step S103: Determine the cable configuration information of the excitation coil based on the maximum voltage value and the maximum current value.

[0072] Step S104: Based on the core parameters of the generator, determine the core loss value of the generator during the core magnetization test, and determine the maximum core loss value of the generator during the core magnetization test from the core loss value.

[0073] Step S105: Determine the equipment configuration information of the generator core magnetization test equipment based on the maximum core loss value, maximum voltage value, and maximum current value.

[0074] Among them, the core magnetization test equipment can be a combination of equipment used to perform magnetization tests on the stator core of a generator, such as a combination of equipment including an induction voltage regulator, a test transformer, and a compensation capacitor bank.

[0075] The excitation coil can be a wire wound around the stator core of the generator to generate a magnetic field, such as 12 turns of wire uniformly wound around the stator core of the generator.

[0076] The preset number of turns can be the number of turns of the excitation coil that is set in advance, such as 12 turns.

[0077] Among them, the core parameters can be various parameters that describe the characteristics of the generator stator core, such as stator core length, stator core outer diameter, stator core inner diameter, stator slot depth, stator ventilation duct width, and stator ventilation duct number.

[0078] Among them, the excitation parameters can be parameters that describe the working characteristics of the excitation coil, such as the voltage and current values ​​of the excitation coil.

[0079] The cable configuration information can be information describing the characteristics of the cable used for the excitation coil, such as the cross-sectional area, insulation level, and length of the cable.

[0080] Among them, the core loss value can be the power loss generated by the generator stator core during the magnetization test, for example, it can be the loss value calculated based on the mass of the stator core yoke and the standard ratio loss of silicon steel sheet material.

[0081] The equipment configuration information can be information describing the characteristics of each component of the core magnetization test equipment, such as the capacity and voltage level of equipment like induction voltage regulators, test transformers, high-voltage compensation capacitor banks, and low-voltage compensation capacitor banks.

[0082] Optionally, when selecting a large generator core magnetization test equipment, firstly, the preset number of turns of the generator's excitation coil is set to 12 turns. The generator's core parameters are then obtained, including stator core length, stator core outer diameter, stator core inner diameter, stator slot depth, stator ventilation duct width, and the number of stator ventilation ducts. Then, the voltage value of the excitation coil is calculated using the formula U1=4.44fQBW1, where f is the test power frequency, Q is the cross-sectional area of ​​the stator core yoke, and B is the magnetic flux density of the stator core yoke during the test. Simultaneously, the voltage is calculated using the formula I=π(D1-H). ys H / W1 is used to calculate the current value of the excitation coil, where D1 is the outer diameter of the stator core, and H... ysThe stator core yoke height is given by H, where H is the magnetic field strength of the silicon steel sheet under a specific magnetic flux density. Next, based on the calculated maximum voltage and maximum current values, the cable configuration information for the excitation coil is determined, including the cable cross-sectional area, insulation level, and length. Then, the core loss value is calculated based on the generator's core parameters, and the maximum core loss value is determined. Finally, based on the maximum core loss value, maximum voltage value, and maximum current value, the capacity and voltage rating of equipment such as the induction voltage regulator, test transformer, high-voltage compensation capacitor bank, and low-voltage compensation capacitor bank are determined.

[0083] In the selection method of the above-mentioned large generator core magnetization test equipment, the excitation parameters of the generator are determined according to the preset number of turns of the generator's excitation coil and the generator's core parameters. The excitation parameters include the voltage value and the current value of the excitation coil. The maximum voltage value is determined from the voltage value of the excitation coil, and the maximum current value is determined from the current value of the excitation coil. The cable configuration information of the excitation coil is determined according to the maximum voltage value and the maximum current value. The core loss value of the generator during the core magnetization test is determined according to the generator's core parameters, and the maximum core loss value of the generator during the core magnetization test is determined from the core loss value. The equipment configuration information of the generator core magnetization test equipment is determined according to the maximum core loss value, the maximum voltage value, and the maximum current value. This scheme determines the excitation parameters by pre-setting the number of turns of the generator's excitation coil and combining them with the core parameters. Then, it determines the maximum voltage and maximum current values ​​based on the excitation parameters, which simplifies the calculation process and improves the accuracy of parameter determination. Next, it determines the cable configuration information based on the maximum voltage and maximum current values, and determines the maximum core loss value based on the core parameters. Finally, it comprehensively considers these parameters to determine the equipment configuration information, which helps to form an automated equipment selection process and thus improves the efficiency of determining the configuration information of the generator core magnetization test equipment.

[0084] In one exemplary embodiment, reference is made to Figure 2 Based on the preset number of turns of the generator's excitation coil and the generator's core parameters, the generator's excitation parameters are determined, specifically including the following:

[0085] Step S201: Obtain the cross-sectional area of ​​the stator core yoke and the magnetic flux density of the stator core yoke from the core parameters of the generator.

[0086] Step S202: Determine the voltage value of the excitation coil based on the frequency information of the test power supply, the cross-sectional area of ​​the stator core yoke, the magnetic flux density of the stator core yoke, the preset number of turns, and the preset coefficient.

[0087] Step S203: Obtain the outer diameter of the generator stator core, the stator core yoke height, and the magnetic field strength of the generator's silicon steel sheets at a preset magnetic flux density from the generator's core parameters.

[0088] Step S204: Determine the current value of the excitation coil based on the stator core outer diameter, stator core yoke height, magnetic field strength, and preset number of turns.

[0089] The cross-sectional area of ​​the stator core yoke can be the cross-sectional area of ​​the stator core yoke, for example, it can be the product of the net length of the stator core and the height of the stator core yoke.

[0090] The magnetic flux density of the stator core yoke can be the magnetic induction intensity of the stator core yoke, for example, it can be 1.4T for a salient pole synchronous generator or 1.0T for a hydro generator.

[0091] The frequency information of the test power supply can be the AC frequency of the test power supply, for example, 50Hz.

[0092] The preset coefficient can be a fixed coefficient used to calculate the excitation coil voltage value, for example, 4.44.

[0093] The stator core yoke height can be half the difference between the stator core outer diameter and the stator core inner diameter minus the stator slot depth. For example, it can be (stator core outer diameter - stator core inner diameter) / 2 - stator slot depth.

[0094] The magnetic field strength of the silicon steel sheet at a preset magnetic flux density can be the magnetic field strength of the silicon steel sheet at a specific magnetic flux density, such as the magnetic field strength of the silicon steel sheet at 1.4T (salient pole synchronous generator) or 1.0T (hydro turbine generator), and the specific value is given by the manufacturer.

[0095] Optionally, the terminal first obtains parameters such as stator core length, stator ventilation duct width, number of stator ventilation ducts, stator core outer diameter, stator core inner diameter, and stator slot depth from the generator's core parameters, and then calculates the parameters according to formula L. u =k Fe (Lb) v n v Calculate the net length of the stator core, where k Fe Where L is the stator core stacking factor, and b is the stator core length. v To ensure the width of the stator ventilation duct, n v The number of stator ventilation ducts; then according to formula H ys =(D1-D2) / 2-H s Calculate the stator core yoke height, where D1 is the outer diameter of the stator core, D2 is the inner diameter of the stator core, and H is the yoke height. s The stator slot depth is given; then, according to the formula Q=L u H ys Calculate the cross-sectional area of ​​the stator core yoke; finally, calculate the voltage value of the excitation coil according to the formula U1=4.44fQBW1, and calculate the voltage value of the excitation coil according to the formula I=π(D1-H).ys )H / W1 calculates the current value of the excitation coil.

[0096] The technical solution provided in this embodiment obtains parameters such as the cross-sectional area of ​​the stator core yoke and the magnetic flux density from the generator's core parameters, and calculates them in conjunction with the frequency information of the test power supply and preset coefficients. This helps to accurately determine the voltage value of the excitation coil. At the same time, by obtaining parameters such as the stator core outer diameter, stator core yoke height, and magnetic field strength of the silicon steel sheet at the preset magnetic flux density, it helps to accurately determine the current value of the excitation coil, thereby improving the accuracy of determining the generator's excitation parameters.

[0097] In an exemplary embodiment, the cable configuration information of the excitation coil is determined based on the maximum voltage value and the maximum current value, specifically including the following: determining the cable cross-sectional information of the excitation coil based on the maximum current value; determining the cable insulation information of the excitation coil based on the maximum voltage value; determining the reference length of the excitation coil based on the preset number of turns, the length of the generator stator core, the outer diameter of the generator stator core, and the inner diameter of the generator stator core; determining the target length of the excitation coil based on the reference length; the target length is a preset length multiple of the reference length; and generating the cable configuration information of the excitation coil based on the cable cross-sectional information, the cable insulation information, and the target length.

[0098] The cable cross-section information can be information describing the size of the cross-sectional area of ​​the cable used for the excitation coil, for example, it can be information calculated according to the formula S=0.4×I. max The calculated cross-sectional area of ​​the copper cable, where I max This is the maximum current value.

[0099] Among them, cable insulation information can be information describing the insulation level of the cable used for the excitation coil, such as an insulation level value greater than the maximum voltage value.

[0100] The reference length can be the theoretically calculated length of the excitation coil, for example, it can be the length calculated according to formula L. emax =2×W1(L+D1-D2) is the length obtained by calculation, where W1 is the preset number of turns, L is the length of the generator stator core, D1 is the outer diameter of the generator stator core, and D2 is the inner diameter of the generator stator core.

[0101] The target length can be the actual length of the excitation coil, for example, it can be 1.5 times the reference length.

[0102] The preset length multiple can be a fixed coefficient used to calculate the target length, such as 1.5.

[0103] The cable configuration information can be a comprehensive description of the characteristics of the cable used for the excitation coil, such as a combination of information including cable cross-sectional area, insulation level, total length and number of segments (12 segments).

[0104] Optionally, the terminal first calculates the cable cross-sectional area of ​​the excitation coil based on the maximum current value, specifically using the formula S=0.4×I. max Perform calculations, where I max The maximum current value is used; then, the cable insulation level of the excitation coil is determined based on the maximum voltage value, ensuring that the cable insulation level is greater than the maximum voltage value; then, according to formula L... emax =2×W1(L+D1-D2) to calculate the reference length of the excitation coil, where W1 is the preset number of turns, L is the length of the generator stator core, D1 is the outer diameter of the generator stator core, and D2 is the inner diameter of the generator stator core. Then, multiply the reference length of the excitation coil by the preset length multiple 1.5 to obtain the target length of the excitation coil. Finally, based on the calculated cable cross-sectional area, cable insulation level, and target length, generate the cable configuration information of the excitation coil, and divide the cable of the target length into 12 segments for easy on-site winding.

[0105] The technical solution provided in this embodiment helps ensure the safety performance of the cable by determining the cable cross-section information and cable insulation information based on the maximum current value and the maximum voltage value, respectively; by determining the reference length based on the preset number of turns and the stator core parameters of the generator, and using a preset length multiple to determine the target length, it helps ensure the accuracy of the cable length and reserve sufficient construction margin; finally, by comprehensively considering these information to generate complete cable configuration information, it helps improve the accuracy and practicality of cable selection.

[0106] In an exemplary embodiment, the core loss value of the generator during the core magnetization test is determined based on the core parameters of the generator. Specifically, this includes: obtaining the silicon steel sheet density of the generator; determining the stator core yoke mass information based on the generator's stator core outer diameter, stator core yoke height, stator core yoke cross-sectional area, and silicon steel sheet density; in the case of a salient-pole synchronous generator, determining the core loss value based on the standard specific loss of the stator core silicon steel sheet material at a first preset magnetic flux density and the stator core yoke mass information; and in the case of a hydro-generator, determining the core loss value based on the standard specific loss of the stator core silicon steel sheet material at a second preset magnetic flux density and the stator core yoke mass information.

[0107] The density of silicon steel sheets can be the mass per unit volume of silicon steel sheets in the generator stator core, for example, it can be the density value of silicon steel sheets represented by ρ, with the unit being T (Tesla).

[0108] The stator core yoke mass information can be the mass data of the generator stator core yoke, for example, it can be based on the formula m=π(D1-H). ys The mass value calculated by Qρ is expressed in kg (kilograms).

[0109] The first preset magnetic flux density can be the standard magnetic flux density during the magnetization test of the salient pole synchronous generator core, for example, it can be 1.5T (Tesla).

[0110] The second preset magnetic flux density can be the standard magnetic flux density during the magnetization test of the turbine generator core, for example, it can be 1.0T (Tesla).

[0111] The standard specific loss can be the unit mass loss of silicon steel sheet material under a specific magnetic flux density, for example, it can be P s (1.5) represents the standard specific loss or P at a magnetic flux density of 1.5T. s (1.0) represents the standard specific loss at a magnetic flux density of 1.0T, with the unit being W / kg (watts per kilogram).

[0112] Optionally, the terminal first obtains the silicon steel sheet density ρ of the generator from the core parameters of the generator; then, according to the formula m=π(D1-H) ys Qρ calculates the mass information of the stator core yoke of the generator, where D1 is the outer diameter of the generator stator core, and H... ys Let P be the stator core yoke height of the generator, and Q be the cross-sectional area of ​​the stator core yoke. Next, determine the generator type. If the generator is a salient-pole synchronous generator, then according to the formula P = 1.3mP... s (1.5) Calculate the core loss value, where P s (1.5) represents the standard specific loss of the silicon steel sheet material of the generator stator core at a magnetic flux density of 1.5T; if the generator is a hydro-generator, then according to the formula P=1.3mP s (1.0) Calculate the core loss value, where P s (1.0) represents the standard specific loss of the silicon steel sheet material of the generator stator core at a magnetic flux density of 1.0T.

[0113] The technical solution provided in this embodiment calculates the stator core yoke mass information by obtaining the silicon steel sheet density and combining it with parameters such as the stator core outer diameter, stator core yoke height, and stator core yoke cross-sectional area, which is beneficial for accurately obtaining the generator's basic parameters. By distinguishing between salient-pole synchronous generators and hydro-generators, and calculating the standard specific loss under different preset magnetic flux densities, it is beneficial for determining the core loss value of different types of generators in a targeted manner, thereby improving the accuracy of the core loss value calculation.

[0114] In an exemplary embodiment, the equipment configuration information of the generator core magnetization test equipment is determined based on the maximum core loss value, the maximum voltage value, and the maximum current value. Specifically, this includes: determining the capacity configuration information of the induction voltage regulator, the test transformer, and the test power supply based on the maximum core loss value; determining the rated voltage of the test transformer based on the maximum voltage value; and determining the capacitance value of each capacitor in the first compensation capacitor group based on the maximum voltage value, the maximum current value, the number of capacitors in the first compensation capacitor group, and the frequency information of the test power supply.

[0115] The core magnetization test equipment includes an induction voltage regulator, a test transformer, a test power supply, and a first compensation capacitor bank; the first compensation capacitor bank is located at both ends of the excitation coil.

[0116] The inductive voltage regulator can be a device used to adjust the test voltage, for example, it can be... Figure 3 T1 in the test power supply is matched with the input voltage of the test power supply.

[0117] The test transformer can be a device used to convert the regulated voltage into the voltage required for the test, for example, it can be... Figure 3 T2 in the circuit has an input voltage that matches the output voltage of the inductive voltage regulator.

[0118] The test power source can be a device that provides the electrical energy required for the test, for example, it can be... Figure 3 AC~380V power supply.

[0119] The first compensation capacitor bank can be a parallel capacitor bank used to compensate for the inductive reactive power of the excitation coil, for example, it can be... Figure 3 C2 in the figure is set at both ends of the excitation coil.

[0120] The capacity configuration information can be the power capacity parameters of the equipment, for example, it can be calculated according to the formula S=1.2P. max The calculated capacity value, where P max This represents the maximum core loss value.

[0121] The rated voltage can be the nominal operating voltage of the equipment, for example, it can be 1.1 times the maximum voltage value.

[0122] The number of capacitors can be the number of capacitors in the first compensation capacitor group, for example, a value between 15 and 25.

[0123] The frequency information can be the AC frequency of the test power supply, such as 50Hz (Hertz).

[0124] The capacitance value can be the capacitance of each capacitor, for example, it can be calculated according to the formula C1=Imax / 2N1πfU 1max The calculated value, where I max The maximum current value is given, N1 is the number of capacitors, f is the frequency information of the test power supply, and U... 1max This is the maximum voltage value.

[0125] Optionally, the terminal first determines the maximum core loss value P. max The formula S=1.2P is used. max Calculate the capacity configuration information of the induction voltage regulator, test transformer, and test power supply, where the input voltage of the induction voltage regulator is matched with the voltage of the test power supply, and the input voltage of the test transformer is matched with the output voltage of the induction voltage regulator; then, based on the maximum voltage value U... 1max The rated voltage of the test transformer was set to 1.1 times the maximum voltage value U. 1max Next, a first compensation capacitor bank is installed at both ends of the excitation coil. The number of capacitors N1 in the first compensation capacitor bank is set between 15 and 25, according to the formula C1=I max / 2N1πfU 1max Calculate the capacitance value of each capacitor in the first compensation capacitor bank, where I max U represents the maximum current value, f represents the frequency information of the test power supply, and the rated voltage of each capacitor is taken as 1.1 times the maximum voltage value. 1max .

[0126] The technical solution provided in this embodiment compensates for inductive reactive power by setting a first compensation capacitor bank at both ends of the excitation coil, and rationally configures the capacity of the induction voltage regulator, test transformer and test power supply according to the maximum core loss value, which helps to reduce the capacity requirements and equipment specifications of the test equipment; by systematically determining the rated voltage of the test transformer and the capacitance value of the compensation capacitor bank according to parameters such as the maximum voltage value and the maximum current value, it helps to optimize the equipment configuration, thereby helping to reduce the equipment procurement cost and volume, and improve the test efficiency.

[0127] In one exemplary embodiment, the method further includes determining the capacitance value of each capacitor in the second compensation capacitor group based on the maximum core loss value, the number of capacitors in the second compensation capacitor group, the frequency information of the test power supply, and the rated voltage of the test power supply.

[0128] The core magnetization test equipment also includes a second compensation capacitor bank; the second compensation capacitor bank is located on the incoming side of the test power supply.

[0129] The second compensation capacitor bank can be a parallel capacitor bank used to compensate for the inductive reactive power of the inductive voltage regulator, for example, it can be... Figure 3 C1 in the test power supply is set at both ends of the test power supply input line.

[0130] The input side of the test power supply can be the end where the test power supply is connected to the external power grid, for example, it can be... Figure 3 The side connected to AC~380V power.

[0131] The rated voltage of the test power supply can be the nominal operating voltage of the test power supply, for example, it can be... Figure 3 AC~380V (Alternating current 380 volts).

[0132] The number of capacitors can be the number of capacitors in the second compensation capacitor bank, for example, a value between 15 and 25.

[0133] The capacitance value can be the capacitance of each capacitor, for example, it can be calculated using the formula C2=P. max / 2N2πfU s 2 The calculated value, where P max N2 is the maximum core loss value, N2 is the number of capacitors, f is the frequency information of the test power supply, and U is the maximum core loss value. s This is the rated voltage of the test power supply.

[0134] Optionally, the terminal provides a second compensation capacitor bank on the input side of the test power supply. This second compensation capacitor bank is used to compensate for the inductive reactive power of the inductive voltage regulator. The terminal sets the number of capacitors in the second compensation capacitor bank to between 15 and 25, and the rated voltage of each capacitor in the second compensation capacitor bank matches the rated voltage of the test power supply. Then, the terminal applies the formula C2=P... max / 2N2πfU s 2 Calculate the capacitance value of each capacitor in the second compensation capacitor bank, where P max N2 is the maximum core loss value, N2 is the number of capacitors in the second compensation capacitor bank, f is the frequency information of the test power supply, and U is the maximum core loss value. s This is the rated voltage of the test power supply.

[0135] The technical solution provided in this embodiment, by setting a second compensation capacitor bank on the input side of the test power supply, and reasonably determining the capacitance value of each capacitor based on parameters such as the maximum core loss value, the number of capacitors, the frequency information of the test power supply, and the rated voltage, is beneficial to compensate for the inductive reactive power of the inductive voltage regulator, reduce the capacity requirement of the test power supply, thereby reducing the procurement cost of the equipment, reducing the weight and size of the equipment, and improving the test efficiency.

[0136] The following application example illustrates the selection method of the large generator core magnetization test equipment provided in this application. This application example uses the method applied to a terminal as an illustration.

[0137] This application example relates to the field of generator core magnetization testing technology.

[0138] The stator core is one of the main components of a generator. The core magnetization test involves applying a specified magnetic flux density to the assembled stator core for a specified duration, measuring core losses and the temperature of each tooth, and checking for localized heating, unit core losses, temperature rise of the hottest tooth, and whether the maximum temperature difference between hot and cold teeth meets specified values. The generator core magnetization test is crucial for evaluating the core's magnetization characteristics and ensuring stable and reliable generator performance. When conducting the generator core magnetization test, the number of turns of the excitation coil, the excitation coil current, and the power supply capacity are typically calculated to determine the appropriate core testing equipment and verify whether existing testing equipment can perform the generator core test.

[0139] In related technologies, there is currently no specific method for selecting generator core testing equipment. Specifically, it involves calculating the number of turns, current, and power supply capacity of the excitation coil; selecting the specifications and length of the excitation cable based on the calculated number of turns and current; and selecting an induction voltage regulator and test transformer based on the calculated power supply capacity, while verifying whether the AC power supply capacity meets the requirements.

[0140] The related technologies have the following problems:

[0141] 1. When selecting core magnetization testing equipment, the output voltage U1 of the test transformer during the test is usually determined first based on experience or the rated voltage of the high-voltage side of the existing test transformer. The number of turns W1 and the excitation coil current I are then calculated using formulas applied to U1, and the specifications and length of the excitation cable are selected accordingly. However, when selecting testing equipment in this way, since U1 is fixed, the number of turns in the excitation coil varies for different generators due to differences in core size. A smaller number of turns can lead to an uneven magnetic field inside the core, affecting the test results; a larger number of turns significantly increases the difficulty of winding the coil.

[0142] 2. The power supply capacity required for conducting the stator core magnetization test is S = 1.1U1I (where U1 is the excitation coil voltage and I is the excitation coil current). Based on this capacity, an induction voltage regulator and a test transformer are selected, and the AC power supply capacity is verified. However, for large hydro-generators, since no compensation measures are considered, the capacity calculated using this formula is too large, which significantly increases the equipment procurement cost and the difficulty of conducting the test.

[0143] The technical solution in this application example has the following characteristics:

[0144] (1) In this application example, considering the ease of winding and the need to ensure the uniformity of the magnetic field of the iron core, a suitable number of turns of the excitation coil is first determined. Based on this, the required excitation coil voltage and current for each test object are calculated. The maximum value of these excitation coil voltages and currents is taken, and then the rated voltage of the test transformer, the specifications of the excitation coil and the length are determined.

[0145] (2) In this application example, considering the large reactive power of the core magnetization test of the large generator, the capacitor bank is used to compensate for the inductive reactive power. Therefore, when selecting the induction voltage regulator, test transformer and checking the AC power supply capacity, only the active power and a small part of the reactive power are considered, which significantly reduces the equipment procurement cost and the difficulty of test implementation.

[0146] The workflow for this application example is as follows:

[0147] (1) Determine the number of turns W1 of the excitation coil for the generator core test. Considering the convenience of winding on site and the uniformity of the magnetic field of the core, W1 = 12 turns is selected. During the test, the excitation coil can be wound evenly on the generator stator core, or it can be wound in four mutually perpendicular directions around the core circumference with 3 turns in each direction to ensure that the magnetic field of the core is sufficiently uniform during the test.

[0148] (2) Determine the maximum excitation coil voltage U for all test objects. 1max According to the formula U1=4.44fQBW1, the set of excitation coil voltages for all test objects is calculated as {U 11 U 12 ...U 1n}, where U 1n U represents the excitation coil voltage of the nth test object, and the maximum excitation coil voltage of all test objects. 1max =max{U 11 U 12 ...U 1n}

[0149] In the above formula: Q=L u H ys (m) 3 Q is the cross-sectional area of ​​the stator core yoke, and L is the cross-sectional area of ​​the stator core y u =k Fe (Lb) v n v (m), where L u For the stator core net length, k Fe Here, L is the stator core stacking factor, and b is the stator core length (m). v The width of the stator ventilation duct (m), n v H represents the number of stator ventilation ducts. ys =(D1-D2) / 2-H s (m), where Hys The stator core yoke height is given by D1, where D1 is the stator core outer diameter (m), D2 is the stator core inner diameter (m), and H is the stator core yoke height. s denoted as stator slot depth (m); f is the test power supply frequency (Hz); and B is the magnetic flux density of the stator core yoke during the test (T).

[0150] (3) Determine the maximum value I of the excitation coil current for all test objects. max According to the formula I=π(D1-H) ys H / W1, calculate the set of excitation coil currents for all test objects as {I1, I2...I... n}, where I n Let I be the excitation coil current of the nth test object, and let I be the maximum excitation coil current of all test objects. max =max{I1、I2……I n}

[0151] In the above formula: H is the magnetic field strength (A / m) of the silicon steel sheet at 1.4 (salient pole synchronous generator) or 1.0T (hydro turbine generator), which is given by the manufacturer.

[0152] (4) Determine the maximum total length L of the excitation coils for all test objects. emax According to formula L emax =2×W1(L+D1-D2), the set of total lengths of the excitation coils of all test objects is calculated as {L e1 L e2 ...L en}, where L en Let L be the total length of the excitation coil of the nth test object, and the maximum total length L of the excitation coils of all test objects. emax =max{L e1 L e2 ...L en}

[0153] (5) Select the appropriate type of excitation coil cable. Its cross-section should be able to withstand the continuous flow of 1.2 times the maximum value of the excitation coil current I under the laying environment. max As required, the cross-sectional area of ​​the copper cable can be calculated as S=0.4×I. max The value should be determined; its insulation level should be greater than the maximum value U of the excitation coil voltage. 1max Its length is 1.5 times the maximum total length L of the excitation coil. emax To facilitate on-site winding, the wire can be divided into 12 equal segments.

[0154] (6) Determine the maximum active power loss P of the core magnetization test for all test objects. max For salient-pole synchronous generators and hydro-generators, according to the formula P=1.3mP... s(1.5) and P=1.3mP s (1.0) The set of core losses during the magnetization test of all test objects is calculated as {P1, P2...P...} n}, where P n Let P be the core loss during the magnetization test of the nth test object, and the maximum core loss P during the magnetization test of all test objects. max =max{P1, P2, ..., P} n}

[0155] In the above formula: m = π (D1 - H) ys Qρ (kg), m is the mass of the stator core yoke, and ρ is the density of the silicon steel sheet (T); P s (1.0) represents the standard specific loss of the stator core silicon steel sheet material at 1.0T, in W / kg; P s (1.5) represents the standard specific loss of the stator core silicon steel sheet material at 1.5T, in W / kg.

[0156] (7) Select the appropriate induction voltage regulator, test transformer, and test power supply. The capacity of the induction voltage regulator, test transformer, and test power supply should be 1.2 times the maximum active power loss P. max Calculate, i.e., S = 1.2P max The input voltage of the induction voltage regulator is matched with the test power supply voltage, the input voltage of the test transformer is matched with the output voltage of the induction voltage regulator, and the rated voltage of the test transformer is taken as 1.1 times the maximum value U of the excitation coil voltage. 1max .

[0157] (8) Select the high-voltage compensation reactor group. A set of high-voltage parallel capacitor banks is set at both ends of the excitation coil to compensate for the inductive reactive power of the excitation coil. The number of capacitors N1 in the high-voltage parallel capacitor bank is generally between 15 and 25. The rated voltage of the capacitors is taken as 1.1 times the maximum value of the excitation coil voltage U. 1max The capacitance of each capacitor is C1=I max / 2N1πfU 1max .

[0158] (9) Select the appropriate low-voltage compensation reactor group. A low-voltage parallel capacitor bank is installed at both ends of the test power supply input line to compensate for the inductive reactive power of the induction voltage regulator. The number of capacitors N2 in the low-voltage parallel capacitor bank is generally between 15 and 25. The rated voltage of the capacitors matches the rated voltage of the test power supply, and the capacitance value of each capacitor is C2 = P. max / 2N2πfU s 2 .

[0159] In the above formula: U s This is the rated voltage of the test power supply.

[0160] The principle of generator stator core magnetization test is referenced. Figure 3 , Figure 3 The complete test system configuration is demonstrated. The system includes an AC~380V power supply, switch cabinet K, induction voltage regulator T1, oil-immersed transformer T2, low-voltage compensation capacitor bank C1, high-voltage compensation capacitor bank C2, excitation winding W1, measuring winding W2, current transformer (CT), voltage transformer (PT), voltmeter (V), and a loss tester. The low-voltage compensation capacitor bank C1 is located on the power supply input side, and the high-voltage compensation capacitor bank C2 is located across the excitation winding to compensate for inductive reactive power. Here, AC represents alternating current, CT represents current transformer, PT represents voltage transformer, V represents voltmeter, and G represents grounding point.

[0161] When the test power supply capacity is sufficient, the low-voltage compensation reactor group in step 9 can be omitted.

[0162] Among them, the generator stator core is an important component that constitutes the generator magnetic flux circuit and fixes the stator coil. It is composed of laminations and various fasteners pressed together to form a whole.

[0163] Among them, the core magnetization test is a test in which a specified magnetic flux density is applied to the assembled stator core for a specified duration, the core loss and the temperature of each tooth are measured, and the test is conducted to check whether there is local heating of the core, the unit loss of the core, the temperature rise of the hottest tooth, and whether the maximum temperature difference between the hot and cold teeth meet the specified values.

[0164] The technical solution provided in this application example, through the selection of test equipment, ensures that the number of turns W1 of the excitation coil is fixed and does not change with the size of the generator core, thus avoiding adverse effects on the test results due to the uniformity of the internal magnetic field during the core magnetization test. Furthermore, the appropriate number of turns for the excitation coil significantly reduces the difficulty of on-site winding. A set of parallel capacitor banks is installed at both ends of the excitation coil and at both ends of the test power supply input to compensate for the inductive reactive power of the induction voltage regulator and the excitation coil. This significantly reduces the capacity of the test power supply, induction voltage regulator, and test transformer required for the core magnetization test, lowering equipment procurement costs while also reducing equipment weight and size, facilitating on-site testing. This also improves the efficiency of determining the configuration information of the generator core magnetization test equipment.

[0165] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0166] Based on the same inventive concept, this application also provides a selection device for a large generator core magnetization test equipment, which implements the selection method for the large generator core magnetization test equipment described above. The solution provided by this device is similar to the solution described in the above method. Therefore, the specific limitations in one or more embodiments of the selection device for a large generator core magnetization test equipment provided below can be found in the limitations of the selection method for the large generator core magnetization test equipment described above, and will not be repeated here.

[0167] In one exemplary embodiment, such as Figure 4 As shown, a selection device for a large generator core magnetization test equipment is provided. This selection device 400 may include:

[0168] The first determining module 401 is used to determine the excitation parameters of the generator based on the preset number of turns of the generator's excitation coil and the core parameters of the generator; the excitation parameters include the voltage value and the current value of the excitation coil.

[0169] The second determining module 402 is used to determine the maximum voltage value from the voltage value of the excitation coil and the maximum current value from the current value of the excitation coil.

[0170] The third determining module 403 is used to determine the cable configuration information of the excitation coil based on the maximum voltage value and the maximum current value;

[0171] The fourth determining module 404 is used to determine the core loss value of the generator during the core magnetization test based on the core parameters of the generator, and to determine the maximum core loss value of the generator during the core magnetization test from the core loss value.

[0172] The fifth determining module 405 is used to determine the equipment configuration information of the generator core magnetization test equipment based on the maximum core loss value, the maximum voltage value, and the maximum current value.

[0173] In an exemplary embodiment, the first determining module 401 is further configured to: obtain the cross-sectional area of ​​the stator core yoke and the magnetic flux density of the stator core yoke from the core parameters of the generator; determine the voltage value of the excitation coil based on the frequency information of the test power supply, the cross-sectional area of ​​the stator core yoke, the magnetic flux density of the stator core yoke, the preset number of turns, and the preset coefficient; obtain the outer diameter of the stator core, the height of the stator core yoke, and the magnetic field strength of the silicon steel sheet of the generator at the preset magnetic flux density from the core parameters of the generator; and determine the current value of the excitation coil based on the outer diameter of the stator core, the height of the stator core yoke, the magnetic field strength, and the preset number of turns.

[0174] In an exemplary embodiment, the third determining module 403 is further configured to: determine the cable cross-section information of the excitation coil based on the maximum current value; determine the cable insulation information of the excitation coil based on the maximum voltage value; determine the reference length of the excitation coil based on the preset number of turns, the stator core length of the generator, the outer diameter of the stator core of the generator, and the inner diameter of the stator core of the generator; determine the target length of the excitation coil based on the reference length; the target length is a preset length multiple of the reference length; and generate cable configuration information of the excitation coil based on the cable cross-section information, the cable insulation information, and the target length.

[0175] In an exemplary embodiment, the fourth determining module 404 is further configured to obtain the silicon steel sheet density of the generator; determine the stator core yoke mass information of the generator based on the stator core outer diameter, stator core yoke height, stator core yoke cross-sectional area, and silicon steel sheet density; in the case of a salient-pole synchronous generator, determine the core loss value based on the standard specific loss of the stator core silicon steel sheet material at a first preset magnetic flux density and the stator core yoke mass information; and in the case of a hydro-generator, determine the core loss value based on the standard specific loss of the stator core silicon steel sheet material at a second preset magnetic flux density and the stator core yoke mass information.

[0176] In an exemplary embodiment, the core magnetization test equipment includes an induction voltage regulator, a test transformer, a test power supply, and a first compensation capacitor bank; the first compensation capacitor bank is disposed at both ends of the excitation coil; the fifth determining module 405 is further configured to determine the capacity configuration information of the induction voltage regulator, the capacity configuration information of the test transformer, and the capacity configuration information of the test power supply based on the maximum core loss value; determine the rated voltage of the test transformer based on the maximum voltage value; and determine the capacitance value of each capacitor in the first compensation capacitor bank based on the maximum voltage value, the maximum current value, the number of capacitors in the first compensation capacitor bank, and the frequency information of the test power supply.

[0177] In an exemplary embodiment, the core magnetization test equipment further includes a second compensation capacitor bank; the second compensation capacitor bank is disposed on the input side of the test power supply; the device 400 further includes: a sixth determining module, used to determine the capacitance value of each capacitor in the second compensation capacitor bank based on the maximum core loss value, the number of capacitors in the second compensation capacitor bank, the frequency information of the test power supply, and the rated voltage of the test power supply.

[0178] The modules in the selection device for the aforementioned large generator core magnetization test equipment can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in the processor of a computer device in hardware form or independent of it, or stored in the memory of a computer device in software form, so that the processor can call and execute the corresponding operations of each module.

[0179] In one exemplary embodiment, a computer device is provided, which may be a terminal, and its internal structure diagram may be as follows: Figure 5 As shown, the computer device includes a processor, memory, input / output interface, communication interface, display unit, and input device. The processor, memory, and input / output interface are connected via a system bus, and the communication interface, display unit, and input device are also connected to the system bus via the input / output interface. The processor provides computing and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The input / output interface is used for exchanging information between the processor and external devices. The communication interface is used for wired or wireless communication with external terminals; wireless communication can be achieved through Wi-Fi, mobile cellular networks, NFC (Near Field Communication), or other technologies. When the computer program is executed by the processor, it implements a selection method for a large generator core magnetization test device. The display unit is used to form a visually visible image and can be a display screen, projection device, or virtual reality imaging device. The display screen can be an LCD screen or an e-ink screen. The input device of the computer device can be a touch layer covering the display screen, or buttons, trackballs, or touchpads set on the casing of the computer device, or external keyboards, touchpads, or mice, etc.

[0180] Those skilled in the art will understand that Figure 5 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0181] In one exemplary embodiment, a computer device is also provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps in the above-described method embodiments.

[0182] In one exemplary embodiment, a computer-readable storage medium is provided having a computer program stored thereon that, when executed by a processor, implements the steps in the above-described method embodiments.

[0183] In one exemplary embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps in the above-described method embodiments.

[0184] Those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments described above. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.

[0185] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0186] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A method for selecting a large generator core magnetization test device, characterized in that, The method includes: From the core parameters of the generator, obtain the cross-sectional area of ​​the stator core yoke and the magnetic flux density of the stator core yoke of the generator. Based on the frequency information of the test power supply, the cross-sectional area of ​​the stator core yoke, the magnetic flux density of the stator core yoke, the preset number of turns and preset coefficient of the generator's excitation coil, the voltage value of the excitation coil is determined. From the core parameters of the generator, obtain the outer diameter of the stator core, the stator core yoke height, and the magnetic field strength of the silicon steel sheet of the generator at a preset magnetic flux density. The current value of the excitation coil is determined based on the outer diameter of the stator core, the yoke height of the stator core, the magnetic field strength, and the preset number of turns. The maximum voltage value is determined from the voltage value of the excitation coil, and the maximum current value is determined from the current value of the excitation coil; Based on the maximum current value, determine the cable cross-section information of the excitation coil; Based on the maximum voltage value, determine the cable insulation information of the excitation coil; The reference length of the excitation coil is determined based on the preset number of turns, the length of the generator stator core, the outer diameter of the generator stator core, and the inner diameter of the generator stator core. The target length of the excitation coil is determined based on the reference length; the target length is a preset multiple of the reference length. Based on the cable cross-section information, the cable insulation information, and the target length, the cable configuration information of the excitation coil is generated; Obtain the density of the silicon steel sheets in the generator; The mass information of the stator core yoke of the generator is determined based on the outer diameter of the stator core, the height of the stator core yoke, the cross-sectional area of ​​the stator core yoke, and the density of the silicon steel sheets. When the generator is a salient-pole synchronous generator, the core loss value is determined based on the standard ratio loss of the stator core silicon steel sheet material under a first preset magnetic flux density and the mass information of the stator core yoke. When the generator is a hydro generator, the core loss value is determined based on the standard ratio loss of the stator core silicon steel sheet material of the generator under the second preset magnetic flux density and the mass information of the stator core yoke. The maximum core loss value of the generator during the core magnetization test is determined from the core loss value. Based on the maximum core loss value, the maximum voltage value, and the maximum current value, determine the equipment configuration information of the generator core magnetization test equipment.

2. The method according to claim 1, characterized in that, The preset number of turns is 12 turns.

3. The method according to claim 1, characterized in that, The core magnetization test equipment includes an induction voltage regulator, a test transformer, a test power supply, and a first compensation capacitor bank; the first compensation capacitor bank is located at both ends of the excitation coil; The process of determining the equipment configuration information of the generator core magnetization test equipment based on the maximum core loss value, the maximum voltage value, and the maximum current value includes: Based on the maximum core loss value, determine the capacity configuration information of the induction voltage regulator, the capacity configuration information of the test transformer, and the capacity configuration information of the test power supply; The rated voltage of the test transformer is determined based on the maximum voltage value. The capacitance value of each capacitor in the first compensation capacitor group is determined based on the maximum voltage value, the maximum current value, the number of capacitors in the first compensation capacitor group, and the frequency information of the test power supply.

4. The method according to claim 3, characterized in that, The number of capacitors is between 15 and 25.

5. The method according to claim 3, characterized in that, The rated voltage is 1.1 times the maximum voltage value.

6. The method according to claim 3, characterized in that, The core magnetization test equipment also includes a second compensation capacitor bank; the second compensation capacitor bank is located on the input side of the test power supply. The method further includes: The capacitance value of each capacitor in the second compensation capacitor group is determined based on the maximum core loss value, the number of capacitors in the second compensation capacitor group, the frequency information of the test power supply, and the rated voltage of the test power supply.

7. A selection device for a large generator core magnetization test equipment, characterized in that, The device includes: The first determining module is used to obtain the cross-sectional area of ​​the stator core yoke and the magnetic flux density of the stator core yoke from the core parameters of the generator; determine the voltage value of the excitation coil based on the frequency information of the test power supply, the cross-sectional area of ​​the stator core yoke, the magnetic flux density of the stator core yoke, the preset number of turns and the preset coefficient of the excitation coil of the generator; obtain the outer diameter of the stator core, the height of the stator core yoke and the magnetic field strength of the silicon steel sheet of the generator at the preset magnetic flux density from the core parameters of the generator; and determine the current value of the excitation coil based on the outer diameter of the stator core, the height of the stator core yoke, the magnetic field strength and the preset number of turns. The second determining module is used to determine the maximum voltage value from the voltage value of the excitation coil and the maximum current value from the current value of the excitation coil. The third determining module is used to: determine the cable cross-section information of the excitation coil based on the maximum current value; determine the cable insulation information of the excitation coil based on the maximum voltage value; determine the reference length of the excitation coil based on the preset number of turns, the stator core length of the generator, the outer diameter of the stator core of the generator, and the inner diameter of the stator core of the generator; determine the target length of the excitation coil based on the reference length; the target length is a preset length multiple of the reference length; and generate the cable configuration information of the excitation coil based on the cable cross-section information, the cable insulation information, and the target length. The fourth determining module is used to obtain the silicon steel sheet density of the generator; determine the stator core yoke mass information of the generator based on the stator core outer diameter, stator core yoke height, stator core yoke cross-sectional area, and silicon steel sheet density; when the generator is a salient-pole synchronous generator, determine the core loss value based on the standard specific loss of the stator core silicon steel sheet material at a first preset magnetic flux density and the stator core yoke mass information; when the generator is a hydro-generator, determine the core loss value based on the standard specific loss of the stator core silicon steel sheet material at a second preset magnetic flux density and the stator core yoke mass information; and determine the maximum core loss value of the generator during the core magnetization test from the core loss value. The fifth determining module is used to determine the equipment configuration information of the generator core magnetization test equipment based on the maximum core loss value, the maximum voltage value, and the maximum current value.

8. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 6.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 6.

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