A method and system for evaluating the insulation condition of a dry-type air-core reactor

Abstract

The present invention relates to the technical field of reactor fault detection and discloses a method and system for evaluating the insulation state of a dry-type air-core reactor. The present invention establishes a correspondence between mechanical properties and insulation properties based on the encapsulation structure of the dry-type air-core reactor, establishes a correlation between the mechanical parameters and insulation parameters of the reactor, and effectively evaluates the insulation state of the reactor at different aging stages by constructing simulated vibration characteristics output by a simulation model and collected operating vibration characteristics of the actual operating reactor. The method solves the technical problem of how to accurately evaluate the insulation state of a dry-type air-core reactor.

Description

Technical Field

[0001] The present invention relates to the technical field of reactor fault detection, and in particular to a method and system for evaluating the insulation state of a dry-type air-core reactor. Background Art

[0002] Dry-type air-core reactors are increasingly used in power systems, particularly in HVDC converter stations, due to their stable inductance, low losses, and ease of maintenance. The safe and stable operation of dry-type air-core reactors plays a vital role in ensuring the quality of power supply to the power grid.

[0003] Dry-type air-core reactors are subjected to various stresses during operation, including those from electric heat generators. Thermal aging caused by rising operating temperatures is particularly significant for their insulation performance. The inter-turn insulation gradually ages and fails due to heat, leading to inter-turn short-circuit failures. Based on existing engineering experience, numerous incidents of reactor damage, failure, and even fires have been attributed to inter-turn short-circuit failures. Therefore, effective monitoring and assessment of the inter-turn insulation condition of dry-type air-core reactors is crucial. Changes in inter-turn insulation degradation can lead to changes in the reactor's material and mechanical structure, which in turn alter the characteristic parameters of the corresponding electric heat generator. By detecting the corresponding characteristic signals, the insulation condition can be monitored.

[0004] Depending on the selected characteristic parameters and criteria, existing methods for detecting interturn short-circuit faults in dry-type air-core reactors include pulse oscillation, temperature monitoring, impedance monitoring, and spatial magnetic field monitoring. The high-frequency pulse oscillation method, which detects the change in inductance before and after a short circuit, is widely used due to its high accuracy. However, this method is offline, which can cause equipment downtime, and the high-frequency oscillation voltage applied during the detection process can easily damage the reactor, making it somewhat limited. An interturn short-circuit rapidly raises the temperature at the short-circuit site, and temperature measurement can be used to monitor interturn short-circuit faults. However, commonly used infrared temperature imagers can only measure the temperature of the reactor's outer sheath. Embedded fiber optic sensors change the reactor manufacturing process and increase costs, making large-scale adoption of temperature monitoring for interturn short-circuit faults difficult. Turn-to-turn short-circuit faults can alter the equivalent electrical parameters of dry-type air-core reactors, with the rate of change of equivalent resistance typically being much greater than the rate of change of equivalent inductance. Consequently, numerous researchers have proposed fault monitoring methods based on impedance changes during turn-to-turn short-circuits. However, grid frequency fluctuations can cause significant errors in reactor impedance and power angle measurements, and the complex electromagnetic environment of substations places high demands on the anti-interference capabilities of voltage and current sensors. Turn-to-turn short-circuit fault monitoring based on spatial magnetic fields utilizes the changes in spatial magnetic field distribution caused by short-circuit currents to achieve online monitoring. However, this method struggles to locate faults, is affected by numerous factors influencing the spatial magnetic field, and requires high anti-interference capabilities for data transmission during measurement. Therefore, widespread adoption is difficult.

[0005] Therefore, existing dry-type air-core reactor insulation status detection is primarily based on changes in reactor impedance, temperature, and spatial magnetic field before and after a short circuit. These characteristic parameters are insensitive to changes in the reactor's inter-turn insulation status, making it impossible to assess the insulation status early during inter-turn insulation degradation and prevent short-circuit faults. The high-frequency pulse oscillation method is an offline detection method that requires stopping the reactor's normal operation and causes certain damage to the reactor, resulting in low feasibility and high maintenance costs. Therefore, there is an urgent need for a turn-to-turn insulation status assessment method that is sensitive, reliable, resistant to strong magnetic field interference, and capable of characterizing the degree of insulation degradation in real time. This method can then reliably monitor the insulation performance of the reactor's encapsulation and prevent inter-turn short-circuit fires. Summary of the Invention

[0006] The present invention provides a method and system for evaluating the insulation state of a dry-type air-core reactor, which solves the technical problem of how to accurately evaluate the insulation state of a dry-type air-core reactor.

[0007] A first aspect of the present invention provides a method for evaluating the insulation condition of a dry-type air-core reactor, comprising:

[0008] Obtaining multiple encapsulated insulation sample groups of dry-type air-core reactors, and performing mechanical tests and insulation tests on each of the encapsulated insulation sample groups to obtain corresponding initial elastic modulus values ​​and initial insulation degradation degree values;

[0009] Selecting a plurality of the encapsulated insulation sample groups that meet preset parameter characteristic conditions as initial insulation state evaluation groups, and using the initial elastic modulus value and the initial insulation degradation degree value associated with each of the initial insulation state evaluation groups as the evaluation elastic modulus value and the evaluation insulation degradation degree value;

[0010] selecting a target insulation state assessment group from a plurality of the initial insulation state assessment groups based on the initial insulation degradation degree values ​​of the initial insulation state assessment groups, and determining a target absolute degradation assessment value of the target insulation state assessment group;

[0011] Using a plurality of the evaluated elastic modulus values ​​to input a pre-built reactor simulation model for simulation, obtaining a simulated vibration amplitude, and determining a simulation state parameter corresponding to each of the evaluated elastic modulus values ​​according to the simulated vibration amplitude;

[0012] In response to a state evaluation instruction for an operating reactor, obtaining an operating vibration amplitude of the operating reactor, and determining an operating state parameter of the operating reactor using the operating vibration amplitude;

[0013] The simulated vibration amplitude and the simulated state parameter corresponding to each of the evaluated elastic modulus values ​​are used, combined with the operating vibration amplitude and the operating state parameter, to match the evaluated insulation degradation degree value associated with the evaluated elastic modulus value, and determine the insulation state of the operating inductor based on the target absolute degradation evaluation value.

[0014] Optionally, obtaining a plurality of encapsulated insulation sample groups of dry-type air-core reactors includes:

[0015] Obtaining the insulation structure of the dry-type air-core reactor;

[0016] constructing a plurality of encapsulated insulation specimens according to the insulation structure;

[0017] performing an aging test on a plurality of the encapsulated insulation samples;

[0018] Grouping the plurality of encapsulated insulation samples after the aging test according to a preset grouping rule to obtain a plurality of encapsulated insulation sample groups;

[0019] The preset grouping rule is to select a preset number of the encapsulated insulation samples as one encapsulated insulation sample group according to each preset aging cycle.

[0020] Optionally, performing mechanical testing and insulation testing on each of the encapsulated insulation sample groups to obtain corresponding initial elastic modulus values ​​and initial insulation degradation degree values ​​includes:

[0021] Performing mechanical testing on each of the encapsulated insulation sample groups using an electro-hydraulic servo universal testing machine to obtain an initial elastic modulus value corresponding to each of the encapsulated insulation sample groups;

[0022] Performing pressure tests on each of the encapsulated insulation sample groups in sequence to obtain test discharge parameter characteristics corresponding to each of the encapsulated insulation sample groups;

[0023] Obtaining initial discharge parameter characteristics of the encapsulated insulation sample group in an unaged state;

[0024] The initial insulation degradation degree values ​​corresponding to the respective encapsulated insulation sample groups are determined by using the test discharge parameter characteristics and the initial discharge parameter characteristics.

[0025] Optionally, the selecting of a plurality of encapsulated insulation sample groups that meet preset parameter characteristic conditions as initial insulation state evaluation groups, and using the initial elastic modulus value and the initial insulation degradation degree value associated with each initial insulation state evaluation group as the evaluation elastic modulus value and the evaluation insulation degradation degree value, includes:

[0026] Performing characteristic calculations using the test discharge parameter characteristics and the initial discharge parameter characteristics to obtain parameter characteristic values ​​corresponding to the respective encapsulated insulation sample groups;

[0027] Determining whether the parameter characteristic value meets the preset parameter characteristic condition;

[0028] Wherein, the preset parameter characteristic condition is that the parameter characteristic value is greater than or equal to the preset characteristic threshold;

[0029] If the parameter characteristic value satisfies the preset parameter characteristic condition, the encapsulated insulation sample group associated with the parameter characteristic value is used as the initial insulation state evaluation group;

[0030] The initial elastic modulus value and the initial insulation degradation degree value associated with each initial insulation state evaluation group are used as the evaluation elastic modulus value and the evaluation insulation degradation degree value for simulation.

[0031] Optionally, selecting a target insulation state assessment group from a plurality of the initial insulation state assessment groups based on the initial insulation degradation degree values ​​of the initial insulation state assessment groups, and determining a target absolute degradation assessment value of the target insulation state assessment group comprises:

[0032] Sorting the plurality of initial insulation state assessment groups according to a preset pressure test sequence, and selecting the last initial insulation state assessment group subjected to the pressure test as the target insulation state assessment group;

[0033] Using the initial insulation degradation degree value associated with the target insulation state assessment group as an initial absolute degradation assessment value;

[0034] The initial absolute degradation assessment value is multiplied by a preset absolute degradation coefficient to obtain a target absolute degradation assessment value.

[0035] Optionally, the step of using a plurality of the evaluated elastic modulus values ​​to input a pre-built reactor simulation model for simulation to obtain a simulated vibration amplitude, and determining a simulation state parameter corresponding to each of the evaluated elastic modulus values ​​according to the simulated vibration amplitude, includes:

[0036] Using a plurality of the evaluated elastic modulus values ​​as input into a constructed reactor simulation model to perform electric field and mechanical field simulations, and obtain a vibration signal distribution of each of the evaluated elastic modulus values;

[0037] Based on the distribution of each vibration signal, a preset encapsulation height of the dry-type air-core reactor is selected as a signal extraction point, and a simulated vibration amplitude of the signal extraction point under each of the evaluated elastic modulus values ​​is obtained;

[0038] The simulated vibration amplitudes are used to determine the simulated state parameters of the evaluated elastic modulus values.

[0039] Optionally, the simulated vibration amplitude includes a simulated vibration total amplitude and a simulated vibration component amplitude, and the use of each simulated vibration amplitude to determine the simulation state parameter of each evaluated elastic modulus value includes:

[0040] Performing a difference operation using the simulated vibration total amplitude and the simulated vibration component amplitude to obtain a first difference;

[0041] A ratio operation is performed between each of the first differences and the associated amplitude of the simulated vibration component to obtain a simulation state parameter of each of the evaluated elastic modulus values.

[0042] Optionally, the step of responding to the state evaluation instruction for the operating reactor, obtaining the operating vibration amplitude of the operating reactor, and determining the operating state parameter of the operating reactor by using the operating vibration amplitude includes:

[0043] In response to a state evaluation instruction for an operating reactor, obtaining an operating vibration amplitude of the operating reactor;

[0044] Wherein, the operating vibration amplitude includes the total operating vibration amplitude and the operating vibration component amplitude;

[0045] Performing a difference operation on the total amplitude of the operating vibration and the amplitude of the operating vibration component to obtain a second difference;

[0046] The operating state parameter of the operating reactor is obtained by performing a ratio operation on the second difference and the amplitude of the operating vibration component.

[0047] Optionally, the adopting the simulated vibration amplitude and the simulated state parameter corresponding to each of the evaluated elastic modulus values, combining the operating vibration amplitude and the operating state parameter, matching the evaluated insulation degradation degree value associated with the evaluated elastic modulus value, and determining the insulation state of the operating reactor based on the target absolute degradation evaluation value includes:

[0048] Determining a plurality of evaluation matching values ​​corresponding to the operating reactor by using the simulated vibration amplitude and the simulated state parameter corresponding to each of the evaluated elastic modulus values, in combination with the operating vibration amplitude and the operating state parameter;

[0049] Selecting a minimum value from the plurality of evaluated matching values, and determining the evaluated elastic modulus value associated with the evaluated matching value of the minimum value;

[0050] matching an estimated insulation degradation degree value associated with the estimated elastic modulus value as an actual insulation degradation degree value of the operating reactor;

[0051] comparing the actual insulation degradation degree value with the target absolute degradation assessment value;

[0052] If the actual insulation degradation degree value is less than the target absolute degradation assessment value, it is determined that the operating reactor is not in an absolute degradation state;

[0053] If the actual insulation degradation degree value is greater than or equal to the target absolute degradation evaluation value, it is determined that the operating reactor is in an absolute degradation state.

[0054] Optionally, it also includes:

[0055] Simulating the reactor simulation model using the evaluated elastic modulus value associated with the target insulation state evaluation group to obtain an evaluated simulated vibration amplitude corresponding to the target insulation state evaluation group;

[0056] Using the evaluation simulation vibration amplitude as the verification simulation vibration amplitude;

[0057] Obtaining an initial evaluation vibration amplitude of the target insulation status evaluation group in an unaged state;

[0058] Determining a target health state constant corresponding to the target insulation state assessment group using the initial assessment vibration amplitude and the verification simulation vibration amplitude;

[0059] Performing a multiplication operation using the target health state constant and a preset constant coefficient to obtain a degradation post-verification constant;

[0060] determining an operating health state constant of the operating reactor using the operating vibration amplitude and the initial evaluation vibration amplitude of the operating reactor in an absolutely degraded state;

[0061] The operating health state constant is compared with the late degradation verification constant, and whether the operating reactor is in the late turn insulation degradation stage is determined according to the comparison result.

[0062] Optionally, comparing the operating health state constant with the late degradation verification constant and determining whether the operating reactor is in the late turn insulation degradation stage according to the comparison result includes:

[0063] comparing the operational health status constant with the post-degradation verification constant;

[0064] If the health state constant is greater than or equal to the late degradation verification constant, it is determined that the operating reactor is in the late turn insulation degradation stage;

[0065] If the health state constant is less than the late degradation verification constant, it is determined that the operating reactor is not in the late stage of inter-turn insulation degradation.

[0066] A second aspect of the present invention provides a dry-type air-core reactor insulation status assessment system, comprising:

[0067] A testing module is used to obtain multiple encapsulated insulation sample groups of dry-type air-core reactors, and perform mechanical tests and insulation tests on each of the encapsulated insulation sample groups to obtain corresponding initial elastic modulus values ​​and initial insulation degradation degree values;

[0068] a first processing module, configured to select a plurality of the encapsulated insulation sample groups that meet preset parameter characteristic conditions as initial insulation state evaluation groups, and use the initial elastic modulus value and the initial insulation degradation degree value associated with each of the initial insulation state evaluation groups as an evaluation elastic modulus value and an evaluation insulation degradation degree value;

[0069] a second processing module, configured to select a target insulation state assessment group from a plurality of the initial insulation state assessment groups based on the initial insulation degradation degree values ​​of the initial insulation state assessment groups, and determine a target absolute degradation assessment value of the target insulation state assessment group;

[0070] a third processing module, configured to use the plurality of evaluated elastic modulus values ​​to input a pre-built reactor simulation model for simulation, obtain a simulated vibration amplitude, and determine a simulation state parameter corresponding to each of the evaluated elastic modulus values ​​according to the simulated vibration amplitude;

[0071] a response module, configured to respond to a state evaluation instruction for an operating reactor, obtain an operating vibration amplitude of the operating reactor, and determine an operating state parameter of the operating reactor using the operating vibration amplitude;

[0072] A state output module is used to use the simulated vibration amplitude and the simulated state parameter corresponding to each of the evaluated elastic modulus values, combined with the operating vibration amplitude and the operating state parameter, to match the evaluated insulation degradation degree value associated with the evaluated elastic modulus value, and determine the insulation state of the operating inductor based on the target absolute degradation evaluation value.

[0073] A third aspect of the present invention provides an electronic device, comprising a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor executes the steps of the dry-type air-core reactor insulation status assessment method as described in any one of the above items.

[0074] A fourth aspect of the present invention provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed, implements the method for evaluating the insulation state of a dry-type air-core reactor as described in any one of the above items.

[0075] A fifth aspect of the present invention provides a computer program product, which includes a computer program stored on a non-transitory computer-readable storage medium, and the computer program includes program instructions, wherein when the program instructions are executed by a computer, the computer executes the dry-type air-core reactor insulation status assessment method as described in any one of the above items.

[0076] It can be seen from the above technical solutions that the present invention has the following advantages:

[0077] In the present invention, a plurality of encapsulated insulation sample groups of dry-type air-core reactors are obtained, and mechanical tests and insulation tests are performed on each encapsulated insulation sample group to obtain corresponding initial elastic modulus values ​​and initial insulation degradation degree values, and a plurality of encapsulated insulation sample groups that meet preset parameter characteristic conditions are selected as initial insulation state evaluation groups, and the initial elastic modulus values ​​and initial insulation degradation degree values ​​associated with each initial insulation state evaluation group are used as evaluation elastic modulus values ​​and evaluation insulation degradation degree values, based on the initial insulation degradation degree values ​​of the initial insulation state evaluation group, a target insulation state evaluation group is selected from the plurality of initial insulation state evaluation groups, and a target absolute degradation evaluation value of the target insulation state evaluation group is determined, and a plurality of evaluation elastic modulus values ​​are input into a pre-constructed reactor simulation model for simulation to obtain a simulated vibration amplitude, and the corresponding value of each evaluation elastic modulus value is determined according to the simulated vibration amplitude. The simulation state parameters of the operating reactor are used to respond to the state evaluation instruction of the operating reactor, the operating vibration amplitude of the operating reactor is obtained, and the operating vibration amplitude is used to determine the operating state parameters of the operating reactor, and the simulation vibration amplitude and simulation state parameters corresponding to each evaluation elastic modulus value are used. In combination with the operating vibration amplitude and the operating state parameters, the evaluation insulation degradation degree value associated with the evaluation elastic modulus value is matched, and the insulation state of the operating reactor is determined based on the target absolute degradation evaluation value; the present invention is based on the encapsulation structure of the dry-type hollow reactor to carry out the correspondence between the mechanical properties and the insulation properties, establish the association between the mechanical parameters and the insulation parameters of the reactor, and effectively evaluate the insulation state of the reactor at different aging stages by constructing the simulation vibration characteristics output by the simulation model and the collected operation vibration characteristics of the actual operating reactor; it solves the technical problem of how to accurately evaluate the insulation state of the dry-type hollow reactor. BRIEF DESCRIPTION OF THE DRAWINGS

[0078] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0079] Figure 1A flowchart of a method for evaluating the insulation status of a dry-type air-core reactor provided in the first embodiment of the present invention;

[0080] Figure 2 A flowchart of a method for evaluating the insulation status of a dry-type air-core reactor provided in the second embodiment of the present invention;

[0081] Figure 3 Schematic diagram of a reactor vibration signal acquisition system provided in Embodiment 2 of the present invention;

[0082] Figure 4 This is a structural block diagram of a dry-type air-core reactor insulation status assessment system provided in the third embodiment of the present invention;

[0083] Figure 5 This is a structural block diagram of a computer device provided in Example 4 of the present invention. DETAILED DESCRIPTION

[0084] The embodiments of the present invention provide a method and system for evaluating the insulation state of a dry-type air-core reactor, which are used to solve the technical problem of how to accurately evaluate the insulation state of a dry-type air-core reactor.

[0085] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0086] See also Figure 1 , Figure 1 This is a flowchart of the steps of a method for evaluating the insulation status of a dry-type air-core reactor provided in Example 1 of the present invention.

[0087] The present invention provides a method for evaluating the insulation condition of a dry-type air-core reactor, comprising:

[0088] Step 101: Acquire multiple encapsulated insulation sample groups of dry-type air-core reactors, and perform mechanical tests and insulation tests on each encapsulated insulation sample group to obtain corresponding initial elastic modulus values ​​and initial insulation degradation degree values.

[0089] A dry-type air-core reactor is a passive electrical device used in power systems to control and regulate voltage, current, and power factor in circuits. Its main component is a hollow coil, typically consisting of multiple layers of windings separated by insulating material. The coil has no iron core.

[0090] The encapsulated insulation sample group refers to a real encapsulated insulation sample made according to the structure of the dry-type air-core reactor. The encapsulated insulation sample is subjected to an aging test and then grouped to obtain the encapsulated insulation sample group.

[0091] Mechanical testing and insulation testing refer to mechanical performance testing and insulation performance testing of encapsulated insulation specimens. Since the elastic modulus of the specimen gradually increases with the increase of thermal aging time, the elastic modulus is selected as the characterization parameter of the mechanical properties of the insulation specimen. The partial discharge characteristics of the specimen can significantly characterize the degree of inter-turn insulation degradation induced by thermal aging. Therefore, the insulation state of the reactor is characterized and evaluated through the positive correlation between the elastic modulus and the insulation degradation state.

[0092] In an embodiment of the present invention, a true-type encapsulated insulation specimen is made according to the structure of a dry-type air-core reactor, and the encapsulated insulation specimen is subjected to an aging test and then grouped to obtain an encapsulated insulation specimen group. The encapsulated insulation specimen group is subjected to a mechanical property test and an insulation performance test to obtain an initial elastic modulus value and an initial insulation degradation degree value for characterizing the insulation state of the reactor.

[0093] Step 102: Select multiple encapsulated insulation sample groups that meet preset parameter characteristic conditions as initial insulation state evaluation groups, and use the initial elastic modulus value and initial insulation degradation degree value associated with each initial insulation state evaluation group as the evaluation elastic modulus value and the evaluation insulation degradation degree value.

[0094] In an embodiment of the present invention, an encapsulated insulation sample group that meets preset parameter characteristic conditions is screened out from multiple encapsulated insulation sample groups as an initial insulation state evaluation group. Since each initial insulation state evaluation group is actually an encapsulated insulation sample group, the initial elastic modulus value and the initial insulation degradation degree value associated with the initial insulation state evaluation group are used as the evaluation elastic modulus value and the evaluation insulation degradation degree value.

[0095] Step 103 : Based on the initial insulation degradation degree values ​​of the initial insulation state assessment groups, a target insulation state assessment group is selected from the multiple initial insulation state assessment groups, and a target absolute degradation assessment value of the target insulation state assessment group is determined.

[0096] In an embodiment of the present invention, a target insulation state assessment group is selected from multiple initial insulation state assessment groups according to a preset selection rule. Since the target insulation state assessment group is actually the initial insulation state assessment group, the initial insulation degradation degree value associated with the target insulation state assessment group is used as the initial absolute degradation assessment value, and the initial absolute degradation assessment value is used as the target absolute degradation assessment value.

[0097] Step 104 : Use multiple evaluated elastic modulus values ​​to input a pre-built reactor simulation model for simulation to obtain a simulated vibration amplitude, and determine a simulation state parameter corresponding to each evaluated elastic modulus value according to the simulated vibration amplitude.

[0098] Reactor simulation model, a pre-built high-fidelity simulation model of a dry-type air-core reactor. This high-fidelity simulation model is based on the actual structure of the reactor and comprehensively considers multiple physical fields.

[0099] The vibration amplitude refers to filtering the collected low-pass vibration signal of the reactor and extracting the total vibration signal amplitude of the frequency band and the amplitude of the 100 Hz frequency component.

[0100] The simulation state parameter is a simulation parameter for detecting the health state of the inter-turn insulation of the reactor obtained by performing calculations based on the simulation vibration amplitude obtained by simulating the simulation model of the dry-type air-core reactor.

[0101] In an embodiment of the present invention, multiple evaluated elastic modulus values ​​are input into a pre-built reactor simulation model to perform electric field and mechanical field simulation, and a simulated vibration amplitude is obtained by simulation. The simulation state parameters corresponding to each evaluated elastic modulus value are determined based on the simulated vibration amplitude.

[0102] Step 105 : In response to the state evaluation instruction for the operating reactor, obtain the operating vibration amplitude of the operating reactor, and use the operating vibration amplitude to determine the operating state parameter of the operating reactor.

[0103] The status assessment instruction refers to a request instruction for performing insulation status assessment on a running dry-type air-core reactor.

[0104] The operating status parameter refers to the operating parameter for detecting the health status of the inter-turn insulation of the reactor, which is obtained by calculating the operating vibration amplitude actually measured by the operating reactor.

[0105] In an embodiment of the present invention, in response to a request instruction for performing insulation status evaluation on a running dry-type air-core reactor, the request instruction is read, the operating vibration amplitude of the running reactor is obtained, and the operating vibration amplitude is used for calculation to obtain the operating status parameters of the running reactor.

[0106] Step 106: Use the simulated vibration amplitude and simulated state parameters corresponding to each evaluated elastic modulus value, combined with the operating vibration amplitude and operating state parameters, to match the evaluated insulation degradation degree value associated with the evaluated elastic modulus value, and determine the insulation state of the operating inductor based on the target absolute degradation evaluation value.

[0107] In an embodiment of the present invention, the simulated vibration amplitude and simulated state parameters corresponding to each evaluated elastic modulus value are used, combined with the operating vibration amplitude and the operating state parameters, to match the evaluated insulation degradation degree value associated with the evaluated elastic modulus value, and based on the evaluated insulation degradation degree value and the target absolute degradation evaluation value, the insulation state of the operating inductor is determined.

[0108] In the present invention, a plurality of encapsulated insulation sample groups of dry-type air-core reactors are obtained, and mechanical tests and insulation tests are performed on each encapsulated insulation sample group to obtain corresponding initial elastic modulus values ​​and initial insulation degradation degree values, and a plurality of encapsulated insulation sample groups that meet preset parameter characteristic conditions are selected as initial insulation state evaluation groups, and the initial elastic modulus values ​​and initial insulation degradation degree values ​​associated with each initial insulation state evaluation group are used as evaluation elastic modulus values ​​and evaluation insulation degradation degree values, based on the initial insulation degradation degree values ​​of the initial insulation state evaluation group, a target insulation state evaluation group is selected from the plurality of initial insulation state evaluation groups, and a target absolute degradation evaluation value of the target insulation state evaluation group is determined, and a plurality of evaluation elastic modulus values ​​are input into a pre-constructed reactor simulation model for simulation to obtain a simulated vibration amplitude, and the corresponding value of each evaluation elastic modulus value is determined according to the simulated vibration amplitude. The simulation state parameters of the operating reactor are used to respond to the state evaluation instruction of the operating reactor, the operating vibration amplitude of the operating reactor is obtained, and the operating vibration amplitude is used to determine the operating state parameters of the operating reactor, and the simulation vibration amplitude and simulation state parameters corresponding to each evaluation elastic modulus value are used. In combination with the operating vibration amplitude and the operating state parameters, the evaluation insulation degradation degree value associated with the evaluation elastic modulus value is matched, and the insulation state of the operating reactor is determined based on the target absolute degradation evaluation value; the present invention is based on the encapsulation structure of the dry-type hollow reactor to carry out the correspondence between the mechanical properties and the insulation properties, establish the association between the mechanical parameters and the insulation parameters of the reactor, and effectively evaluate the insulation state of the reactor at different aging stages by constructing the simulation vibration characteristics output by the simulation model and the collected operation vibration characteristics of the actual operating reactor; it solves the technical problem of how to accurately evaluate the insulation state of the dry-type hollow reactor.

[0109] See also Figure 2 , Figure 2 This is a flowchart of a method for evaluating the insulation status of a dry-type air-core reactor provided in the second embodiment of the present invention.

[0110] The present invention provides a method for evaluating the insulation condition of a dry-type air-core reactor, comprising:

[0111] Step 201: obtaining a plurality of encapsulated insulation sample groups of dry-type air-core reactors;

[0112] Furthermore, step 201 may include the following sub-steps:

[0113] S11. Obtain an insulation structure of a dry-type air-core reactor, wherein the insulation structure is a wire-polyester film-epoxy resin structure.

[0114] In an embodiment of the present invention, an insulation structure of a dry-type air-core reactor is obtained, wherein the insulation structure is a wire-polyester film-epoxy resin structure. The wire-polyester film-epoxy resin structure means that the wire winding in the reactor uses polyester film as an insulation layer, and the entire winding structure is fixed and protected by epoxy resin.

[0115] S12. Construct a plurality of encapsulated insulation specimens according to the insulation structure.

[0116] In the embodiment of the present invention, a true-type encapsulated insulation sample is manufactured based on the conductor-polyester film-epoxy resin structure of a dry-type air-core reactor.

[0117] S13. Perform aging tests on multiple encapsulated insulation samples.

[0118] In the embodiment of the present invention, an accelerated thermal aging test is performed on a plurality of encapsulated insulation samples to obtain turn-to-turn insulation structures in different aging states.

[0119] It should be noted that in actual operation, since the long-term operating temperature rise of the reactor is about 60°C and the operating temperature is taken as 80°C, the thermal aging experiment process should be accelerated by increasing the thermal aging temperature used in the experiment. Therefore, the present invention sets the accelerated thermal aging temperature to 180°C.

[0120] S14, grouping the multiple encapsulated insulation samples after the aging test according to a preset grouping rule to obtain multiple encapsulated insulation sample groups;

[0121] The preset grouping rule is to select a preset number of encapsulated insulation samples as an encapsulated insulation sample group according to each preset aging cycle.

[0122] In this embodiment of the present invention, each aging cycle is set to 24 hours. 3n+3 turn-to-turn insulation specimens (n≤15) are prepared, with three unaged specimens used as controls. After each thermal aging cycle, three specimens are taken out and sequentially designated as the first, second,…i…n groups of specimens, thereby obtaining multiple encapsulated insulation specimen groups.

[0123] Step 202: Perform mechanical tests and insulation tests on each of the encapsulated insulation sample groups to obtain corresponding initial elastic modulus values ​​and initial insulation degradation degree values.

[0124] Furthermore, step 202 may include the following sub-steps:

[0125] S21. Performing a mechanical test on each encapsulated insulation sample group using an electro-hydraulic servo universal testing machine to obtain an initial elastic modulus value corresponding to each encapsulated insulation sample group;

[0126] The initial elastic modulus value is an average elastic modulus value obtained by performing an average calculation on the elastic modulus values ​​of each encapsulated insulation sample in the encapsulated insulation sample group.

[0127] In the embodiment of the present invention, the mechanical properties of the plurality of encapsulated insulation sample groups obtained in step 201 are tested, and the elastic modulus is selected as the characterization parameter of the mechanical properties of the insulation sample, which is recorded as E i (i=0,1,2…n), where E0 is the elastic modulus of the inter-turn insulation in the unaged state. The elastic modulus of the specimen can be obtained by measuring its stress-strain curve using an electro-hydraulic servo universal testing machine.

[0128] S22, performing a pressure test on each encapsulated insulation sample group in sequence to obtain a test discharge parameter characteristic corresponding to each encapsulated insulation sample group;

[0129] Among them, the test discharge parameter characteristics include discharge voltage, discharge power and insulation resistance.

[0130] It should be noted that the elastic modulus value of the sample gradually increases with the increase of thermal aging time. The partial discharge characteristics of the sample can significantly characterize the degree of inter-turn insulation degradation induced by thermal aging. Therefore, the insulation state of the reactor can be characterized and evaluated through the positive correlation between the elastic modulus and the insulation degradation state.

[0131] In the embodiment of the present invention, each encapsulated insulation sample group is subjected to a pressure test in turn, that is, voltage is applied to both ends of the sample, and the discharge voltage U is recorded. start i (Unit: V), pulse discharge power P i (Unit: W), insulation resistance R i (Unit: Ω) (i=0,1,2…n) and other partial discharge parameters.

[0132] It should be noted that the discharge parameter characteristics of the above-mentioned encapsulated insulation sample are average values, such as the discharge voltage U start i , then the discharge voltage of the three encapsulated insulation samples in each group of encapsulated insulation samples is averaged to obtain the discharge voltage U of the encapsulated insulation sample group. start i , the pulse discharge power and insulation resistance are similar and will not be elaborated here.

[0133] It should be noted that the initial partial discharge voltage U start i , insulation resistance R i As the degree of thermal aging increases, the pulse discharge power P i It gradually increases with the deepening of thermal aging.

[0134] S23. Obtain initial discharge parameter characteristics of the encapsulated insulation sample group in an unaged state.

[0135] In the embodiment of the present invention, the initial discharge parameter characteristics of the encapsulated insulation sample group in the unaged state are obtained. The initial discharge parameter characteristics are the initial discharge voltage U of the unaged insulation state. start 0 , initial pulse discharge power P0 and initial insulation resistance R0. Among them, U start 0 , R0, and P0 correspond to the non-aging insulation status respectively.

[0136] S24. Determine the initial insulation degradation degree value corresponding to each encapsulated insulation sample group using the discharge parameter characteristics of each test and the initial discharge parameter characteristics;

[0137] In a specific implementation, to facilitate the implementation of the method, the above process can be converted into a formula encapsulation form, wherein the calculation method of the initial insulation degradation degree value can be as follows:

[0138]

[0139] Where, Indicates the initial insulation degradation value corresponding to the i-th encapsulated insulation sample group, represents the insulation resistance of the i-th encapsulated insulation sample group, represents the initial insulation resistance, Indicates the total number of encapsulated insulation specimen groups.

[0140] Step 203 : Select multiple encapsulated insulation sample groups that meet preset parameter characteristic conditions as initial insulation state evaluation groups, and use the initial elastic modulus value and initial insulation degradation degree value associated with each initial insulation state evaluation group as the evaluation elastic modulus value and the evaluation insulation degradation degree value.

[0141] Furthermore, step 203 may include the following sub-steps:

[0142] S31. Perform characteristic calculations using the discharge parameter characteristics of each test and the initial discharge parameter characteristics to obtain parameter characteristic values ​​corresponding to each encapsulated insulation sample group.

[0143] Among them, the parameter characteristic values ​​include the discharge voltage parameter characteristic value, the discharge power parameter characteristic value and the insulation resistance parameter characteristic value;

[0144] In a specific implementation, to facilitate the implementation of the method, the above process can be converted into a formula encapsulation form, wherein the calculation method of the discharge voltage parameter characteristic value, the discharge power parameter characteristic value and the insulation resistance parameter characteristic value can be as follows:

[0145]

[0146]

[0147]

[0148] Where, represents the characteristic value of the discharge voltage parameter, represents the characteristic value of the discharge power parameter, Indicates the characteristic value of the insulation resistance parameter.

[0149] In the embodiment of the present invention, characteristic calculation is performed using the test discharge parameter characteristics and the initial discharge parameter characteristics corresponding to each encapsulated insulation sample group to obtain the parameter characteristic values ​​corresponding to each encapsulated insulation sample group.

[0150] S32, determining whether the parameter characteristic value meets the preset parameter characteristic condition;

[0151] Among them, the preset parameter characteristic condition is that the parameter characteristic value is greater than or equal to the preset characteristic threshold.

[0152] In an embodiment of the present invention, it is determined whether the parameter characteristic values ​​meet the preset parameter characteristic conditions, that is, whether the discharge voltage parameter characteristic value, the discharge power parameter characteristic value and the insulation resistance parameter characteristic value are all greater than or equal to the preset characteristic threshold value of each parameter type.

[0153] S33. If the parameter characteristic value meets the preset parameter characteristic condition, the encapsulated insulation sample group associated with the parameter characteristic value is used as the initial insulation state evaluation group.

[0154] For ease of understanding, the preset parameter feature conditions are encapsulated in the following form:

[0155]

[0156] In the formula, 0.2 represents the preset characteristic threshold associated with the characteristic value of the discharge voltage parameter, 0.7 represents the preset characteristic threshold associated with the characteristic value of the insulation resistance parameter, and 3 represents the preset characteristic threshold associated with the characteristic value of the discharge power parameter.

[0157] In an embodiment of the present invention, if the parameter characteristic values ​​of each parameter type within the parameter characteristic value are greater than or equal to the associated preset characteristic threshold, the encapsulated insulation sample group associated with the parameter characteristic value is used as the initial insulation state evaluation group.

[0158] S34 , using the initial elastic modulus value and the initial insulation degradation degree value associated with each initial insulation state evaluation group as the evaluation elastic modulus value and the evaluation insulation degradation degree value for simulation.

[0159] In the embodiment of the present invention, the initial elastic modulus value and the initial insulation degradation degree value associated with each initial insulation state evaluation group are used as the evaluation elastic modulus value and the evaluation insulation degradation degree value for simulation.

[0160] Furthermore, step 203 may also include the following sub-steps:

[0161] S35. If the parameter characteristic value does not meet the preset parameter characteristic condition, the encapsulated insulation sample group associated with the parameter characteristic value is eliminated.

[0162] In an embodiment of the present invention, if the parameter characteristic value does not meet the preset parameter characteristic condition, the encapsulated insulation sample group associated with the parameter characteristic value is eliminated.

[0163] Step 204 : Based on the initial insulation degradation degree values ​​of the initial insulation state assessment group, a target insulation state assessment group is selected from the multiple initial insulation state assessment groups, and a target absolute degradation assessment value of the target insulation state assessment group is determined.

[0164] Furthermore, step 204 may include the following sub-steps:

[0165] S41. Sort multiple initial insulation state assessment groups according to a preset pressure test sequence, and select the last initial insulation state assessment group subjected to the pressure test as the target insulation state assessment group.

[0166] The preset pressure test sequence refers to the pre-set sequence for performing pressure tests on multiple initial insulation status assessment groups.

[0167] In the embodiment of the present invention, among the multiple initial insulation state assessment groups that meet the preset parameter characteristic conditions screened out in step 203, the last initial insulation state assessment group subjected to the pressure test is selected as the target insulation state assessment group k.

[0168] It is worth mentioning that since the inter-turn insulation specimens after the target insulation status evaluation group k have aged more seriously, the kth group is used as the final state of the insulation parameters of the present invention when doing the status evaluation.

[0169] S42. Use the initial insulation degradation degree value associated with the target insulation status assessment group as the initial absolute degradation assessment value.

[0170] In the embodiment of the present invention, the target insulation state assessment group is actually the initial insulation state assessment group. Since the initial insulation degradation degree value of the initial insulation state assessment group has been calculated in the above S24, the initial insulation degradation degree value can be directly used as the initial absolute degradation assessment value of the target insulation state assessment group.

[0171] S43: Perform a multiplication operation on the initial absolute degradation assessment value and a preset absolute degradation coefficient to obtain a target absolute degradation assessment value.

[0172] In a specific implementation, to facilitate the implementation of the method, the above process can be converted into a formula encapsulation form, wherein the target absolute degradation assessment value can be calculated as follows:

[0173]

[0174] Where, represents the target absolute degradation assessment value, 0.85 represents the preset absolute degradation coefficient, represents the initial absolute degradation assessment value.

[0175] Step 205 : Use multiple evaluated elastic modulus values ​​to input a pre-built reactor simulation model for simulation to obtain a simulated vibration amplitude, and determine a simulation state parameter corresponding to each evaluated elastic modulus value according to the simulated vibration amplitude.

[0176] Furthermore, step 205 may include the following sub-steps:

[0177] S51. Using multiple evaluated elastic modulus values ​​as input, perform electric field and mechanical field simulations in a constructed reactor simulation model to obtain vibration signal distributions for each evaluated elastic modulus value.

[0178] In the embodiment of the present invention, the electric field and solid mechanics field are applied to the established reactor simulation model, and the elastic modulus is sequentially set to the evaluated elastic modulus value E under different aging conditions during simulation. i (i=0,1,2…k), the vibration signal distribution of the reactor under different insulation conditions can be obtained.

[0179] S52. Based on the distribution of each vibration signal, select a preset encapsulation height of the dry-type air-core reactor as a signal extraction point, and obtain the simulated vibration amplitude of the signal extraction point under each evaluated elastic modulus value.

[0180] In the embodiment of the present invention, the position at 1 / 5 of the envelope height of the lower end of the reactor is taken as the signal extraction point M, and the i-th evaluation elastic modulus value E at this position is i The corresponding total simulated vibration amplitude and 100Hz simulated vibration component amplitude are respectively denoted as A -FEAS i and A -FEA i (i=0,1,2…k).

[0181] S53. Using each simulated vibration amplitude, determine the simulation state parameter of each evaluated elastic modulus value.

[0182] Furthermore, the simulated vibration amplitude includes the simulated vibration total amplitude and the simulated vibration component amplitude. S53 may include the following sub-steps:

[0183] S531 , performing a difference operation using the total amplitude of each simulated vibration and the amplitude of each simulated vibration component to obtain a first difference.

[0184] S532: Perform a ratio operation on each first difference value and the associated simulated vibration component amplitude to obtain a simulation state parameter of each evaluated elastic modulus value.

[0185] In a specific implementation, in order to facilitate the implementation of the method, the above process can be converted into a formula encapsulation form, wherein the calculation method of the simulation state parameter can be as follows:

[0186]

[0187] Where, represents the simulation state parameter corresponding to the i-th evaluated elastic modulus value;

[0188] Step 206 : In response to the state evaluation instruction for the operating reactor, obtain the operating vibration amplitude of the operating reactor, and use the operating vibration amplitude to determine the operating state parameter of the operating reactor.

[0189] Furthermore, step 206 may include the following sub-steps:

[0190] S61. Responding to a state evaluation instruction for an operating reactor, obtaining an operating vibration amplitude of the operating reactor;

[0191] The operating vibration amplitude includes the total operating vibration amplitude and the operating vibration component amplitude.

[0192] In the embodiment of the present invention, in response to the state evaluation instruction of the operating reactor, the reactor vibration signal acquisition system is used to obtain the reactor vibration signal. Figure 3 The vibration signal acquisition system of the reactor includes a vibration sensor, a signal transmission line, an acquisition card and a computer. Under normal operating conditions, the vibration signal of the operating reactor is mainly 100Hz, and the vibration frequency band is mainly concentrated in the range of 0-1kHz. Therefore, a vibration sensor with a frequency band covering 0-2kHz and anti-electromagnetic interference capability can be selected and placed at the measuring point M to measure and collect the vibration signal of the reactor in real-time operation. The vibration signal under the operating state is processed by a low-pass filter of 0-1kHz, and the total amplitude of the operating vibration in this frequency band and the amplitude of the 100Hz operating vibration component are extracted, which are recorded as A respectively. S and A.

[0193] S62. Perform a difference operation on the total amplitude of the operating vibration and the amplitude of the operating vibration component to obtain a second difference.

[0194] S63. Perform a ratio operation on the second difference and the amplitude of the operating vibration component to obtain an operating state parameter of the operating reactor.

[0195] In a specific implementation, in order to facilitate the implementation of the method, the above process can be converted into a formula encapsulation form, wherein the calculation method of the operating state parameter can be as follows:

[0196]

[0197] Where, Indicates the operating status parameter.

[0198] Step 207: Use the simulated vibration amplitude and simulated state parameters corresponding to each evaluated elastic modulus value, combine the operating vibration amplitude and operating state parameters, match the evaluated insulation degradation degree value associated with the evaluated elastic modulus value, and determine the insulation state of the operating inductor based on the target absolute degradation evaluation value.

[0199] Furthermore, step 207 may include the following sub-steps:

[0200] S71. Determine multiple evaluation matching values ​​corresponding to the operating reactor by using the simulated vibration amplitude and the simulated state parameter corresponding to each evaluated elastic modulus value, combined with the operating vibration amplitude and the operating state parameter.

[0201] In a specific implementation, to facilitate the implementation of the method, the above process can be converted into a formula encapsulation form, wherein the calculation method of the evaluation matching value can be as follows:

[0202]

[0203] Where, It represents the evaluation matching value corresponding to the operating reactor under the i-th evaluation elastic modulus value.

[0204] S72: Select a minimum value from the multiple evaluated matching values, and determine an evaluated elastic modulus value associated with the evaluated matching value of the minimum value.

[0205] In the embodiment of the present invention, a minimum value is selected from a plurality of evaluated matching values, and an evaluated elastic modulus value associated with the evaluated matching value of the minimum value is determined.

[0206] It should be noted that when the collected operating vibration characteristics are the smallest difference from the simulated vibration characteristics obtained by simulating using the i-th evaluated elastic modulus value, it means that the insulation state of the operating inductor is closest to the simulation data output by simulating using the i-th evaluated elastic modulus value.

[0207] For ease of understanding, S71-S72 is encapsulated in the following form:

[0208]

[0209] S73 : Match the estimated insulation degradation degree value associated with the estimated elastic modulus value as the actual insulation degradation degree value of the operating reactor.

[0210] In the embodiment of the present invention, when the closest simulation data is matched, the operating reactor is defined as h, that is, the assessed insulation degradation degree value TID associated with the closest i-th assessed elastic modulus value is i As the actual insulation degradation value TID of the operating reactor h .

[0211] S74. Compare the actual insulation degradation degree value with the target absolute degradation assessment value.

[0212] In the embodiment of the present invention, the actual insulation degradation degree value TID is compared h and target absolute degradation assessment value .

[0213] S75. If the actual insulation degradation degree value is less than the target absolute degradation assessment value, it is determined that the operating reactor is not in an absolute degradation state.

[0214] In the embodiment of the present invention, if the actual insulation degradation degree value is less than the target absolute degradation assessment value, it is determined that the operating reactor is not in an absolute degradation state.

[0215] S76. If the actual insulation degradation degree value is greater than or equal to the target absolute degradation assessment value, it is determined that the operating reactor is in an absolute degradation state.

[0216] In the embodiment of the present invention, if the actual insulation degradation degree value is greater than or equal to the target absolute degradation assessment value, it is determined that the operating reactor is in an absolute degradation state.

[0217] It should be noted that here only determines whether the operating reactor is in an absolutely degraded state. The following steps are the later stage of determining whether it is in an absolutely degraded state.

[0218] Furthermore, the method further comprises the following steps:

[0219] Step 208: Simulate the reactor simulation model using the evaluation elastic modulus value associated with the target insulation state evaluation group to obtain the evaluation simulation vibration amplitude corresponding to the target insulation state evaluation group.

[0220] In an embodiment of the present invention, since the target insulation state assessment group is actually the initial insulation state assessment group, the assessment elastic modulus value associated with the initial insulation state assessment group is input into the reactor simulation model, the reactor simulation model is simulated, and the assessment simulation vibration amplitude corresponding to the target insulation state assessment group is obtained.

[0221] Step 209: Using the evaluated simulated vibration amplitude as the verified simulated vibration amplitude.

[0222] In the embodiment of the present invention, the evaluation simulation vibration amplitude is used as the verification simulation vibration amplitude, and the verification simulation vibration amplitude includes the verification simulation vibration total amplitude and the verification simulation vibration component amplitude, which are respectively denoted as A -FEAS k and A -FEA k .

[0223] Step 2010: Obtain the initial evaluation vibration amplitude of the target insulation status evaluation group in a non-aging state.

[0224] In the embodiment of the present invention, the initial evaluation vibration amplitude of the target insulation state evaluation group in the unaged state is obtained. The initial evaluation vibration amplitude includes the initial evaluation total vibration amplitude and the initial evaluation vibration component amplitude, which is recorded as A- FEAS 0 and A- FEA 0 .

[0225] Step 2011: Use the initial assessment vibration amplitude and the verification simulation vibration amplitude to determine the target health state constant corresponding to the target insulation state assessment group.

[0226] The target health status constants include the main frequency amplitude deviation rate and harmonic distortion rate;

[0227] Furthermore, step 2011 specifically includes the following sub-steps:

[0228] Performing a difference operation between the amplitude of the verification simulation vibration component and the amplitude of the initial evaluation vibration component to obtain a third difference;

[0229] Performing a ratio operation on the third difference and the associated initial evaluation vibration component amplitude to obtain an evaluation main frequency amplitude deviation rate corresponding to the target insulation state evaluation group;

[0230] Performing a difference operation on the verification simulation total vibration amplitude and the verification simulation component vibration amplitude to obtain a fourth difference;

[0231] The fourth difference is used to perform a ratio operation with the amplitude of the verification simulation vibration component to obtain the evaluation harmonic distortion rate corresponding to the target insulation status evaluation group;

[0232] The target health status constants include the evaluation of the main frequency amplitude deviation rate and the evaluation of the harmonic distortion rate.

[0233] In a specific implementation, to facilitate the implementation of the method, the above process can be converted into a formula encapsulation form, wherein the main frequency amplitude deviation rate and the harmonic distortion rate can be calculated as follows:

[0234]

[0235]

[0236] Where, Indicates the main frequency amplitude deviation rate corresponding to the target insulation status assessment group, Indicates the harmonic distortion rate corresponding to the target insulation condition assessment group.

[0237] Step 2012: Perform multiplication operation on the target health state constant and the preset constant coefficient to obtain a post-degradation verification constant.

[0238] The post-degradation verification constants include the offset rate verification constant and the distortion rate verification constant.

[0239] In a specific implementation, to facilitate the implementation of the method, the above process can be converted into a formula encapsulation form, where the calculation method of the offset rate verification constant and the distortion rate verification constant can be as follows:

[0240]

[0241]

[0242] Where, Indicates the offset rate verification constant, Represents the distortion rate verification constant, 0.85 represents the preset constant coefficient;

[0243] Step 2013: Determine the operating health state constant of the operating reactor using the operating vibration amplitude and the initial evaluation vibration amplitude of the operating reactor in the absolutely degraded state.

[0244] The operational health status constants include the deviation rate operational constant and the distortion rate operational constant;

[0245] It should be noted that the operating vibration amplitude of the operating reactor here refers to the absolute degradation state. Therefore, the operating vibration amplitude of the operating reactor in the absolute degradation state is defined as and .

[0246] In a specific implementation, to facilitate the implementation of the method, the above process can be converted into a formula encapsulation form, wherein the calculation method of the offset rate running constant and the distortion rate running constant can be as follows:

[0247]

[0248]

[0249] Where, represents the offset rate running constant, Represents the distortion rate running constant.

[0250] Step 2014: Compare the operating health status constant with the late-stage degradation verification constant, and determine whether the operating reactor is in the late stage of inter-turn insulation degradation based on the comparison result.

[0251] Furthermore, step 2014 may include the following sub-steps:

[0252] S81. Compare the operational health status constant with the post-degradation verification constant.

[0253] In an embodiment of the present invention, the operational health status constant is compared with the post-degradation verification constant.

[0254] S82. If the health status constant is greater than or equal to the late degradation verification constant, it is determined that the operating reactor is in the late stage of inter-turn insulation degradation.

[0255] For ease of understanding, it is encapsulated in the following form:

[0256]

[0257]

[0258] In the embodiment of the present invention, if the health state constant is greater than or equal to the late degradation verification constant, it is determined that the operating reactor is in the late stage of inter-turn insulation degradation.

[0259] S83. If the health status constant is less than the late-stage degradation verification constant, it is determined that the operating reactor is not in the late stage of inter-turn insulation degradation.

[0260] In the embodiment of the present invention, if the health state constant is smaller than the late degradation verification constant, it is determined that the operating reactor is not in the late stage of inter-turn insulation degradation.

[0261] In the present invention, a plurality of encapsulated insulation sample groups of dry-type air-core reactors are obtained, and mechanical tests and insulation tests are performed on each encapsulated insulation sample group to obtain corresponding initial elastic modulus values ​​and initial insulation degradation degree values, and a plurality of encapsulated insulation sample groups that meet preset parameter characteristic conditions are selected as initial insulation state evaluation groups, and the initial elastic modulus values ​​and initial insulation degradation degree values ​​associated with each initial insulation state evaluation group are used as evaluation elastic modulus values ​​and evaluation insulation degradation degree values, based on the initial insulation degradation degree values ​​of the initial insulation state evaluation group, a target insulation state evaluation group is selected from the plurality of initial insulation state evaluation groups, and a target absolute degradation evaluation value of the target insulation state evaluation group is determined, and a plurality of evaluation elastic modulus values ​​are input into a pre-constructed reactor simulation model for simulation to obtain a simulated vibration amplitude, and the corresponding value of each evaluation elastic modulus value is determined according to the simulated vibration amplitude. The simulation state parameters of the operating reactor are used to respond to the state evaluation instruction of the operating reactor, the operating vibration amplitude of the operating reactor is obtained, and the operating vibration amplitude is used to determine the operating state parameters of the operating reactor, and the simulation vibration amplitude and simulation state parameters corresponding to each evaluation elastic modulus value are used. In combination with the operating vibration amplitude and the operating state parameters, the evaluation insulation degradation degree value associated with the evaluation elastic modulus value is matched, and the insulation state of the operating reactor is determined based on the target absolute degradation evaluation value; the present invention is based on the encapsulation structure of the dry-type hollow reactor to carry out the correspondence between the mechanical properties and the insulation properties, establish the association between the mechanical parameters and the insulation parameters of the reactor, and effectively evaluate the insulation state of the reactor at different aging stages by constructing the simulation vibration characteristics output by the simulation model and the collected operation vibration characteristics of the actual operating reactor; it solves the technical problem of how to accurately evaluate the insulation state of the dry-type hollow reactor.

[0262] It's worth noting that the vibration amplitude signal analysis method used in this method has no direct electrical connection to the system, is easily detectable online, and can sensitively reflect the mechanical condition of the reactor winding. For any type of dry-type air-core reactor, this method can reliably monitor and assess the insulation condition of the equipment.

[0263] See also Figure 4 , Figure 4 This is a structural block diagram of a dry-type air-core reactor insulation status assessment system provided in Example 3 of the present invention.

[0264] The present invention provides a dry-type air-core reactor insulation status assessment system, comprising:

[0265] The testing module 301 is used to obtain multiple encapsulated insulation sample groups of dry-type air-core reactors, and perform mechanical tests and insulation tests on each encapsulated insulation sample group to obtain corresponding initial elastic modulus values ​​and initial insulation degradation degree values;

[0266] A first processing module 302 is configured to select a plurality of encapsulated insulation sample groups that meet preset parameter characteristic conditions as initial insulation state evaluation groups, and use the initial elastic modulus value and the initial insulation degradation degree value associated with each initial insulation state evaluation group as the evaluation elastic modulus value and the evaluation insulation degradation degree value;

[0267] A second processing module 303 is configured to select a target insulation state assessment group from the multiple initial insulation state assessment groups based on the initial insulation degradation degree values ​​of the initial insulation state assessment groups, and determine a target absolute degradation assessment value of the target insulation state assessment group;

[0268] The third processing module 304 is configured to use a plurality of evaluated elastic modulus values ​​as input into a pre-built reactor simulation model to perform simulation, obtain simulated vibration amplitudes, and determine simulation state parameters corresponding to each evaluated elastic modulus value according to the simulated vibration amplitudes;

[0269] A response module 305 is configured to respond to the state evaluation instruction for the operating reactor, obtain the operating vibration amplitude of the operating reactor, and determine the operating state parameter of the operating reactor using the operating vibration amplitude;

[0270] The state output module 306 is used to use the simulated vibration amplitude and simulated state parameters corresponding to each evaluated elastic modulus value, combined with the operating vibration amplitude and operating state parameters, to match the evaluated insulation degradation degree value associated with the evaluated elastic modulus value, and determine the insulation state of the operating inductor based on the target absolute degradation evaluation value.

[0271] Furthermore, the testing module 301 includes:

[0272] The insulation structure acquisition submodule is used to obtain the insulation structure of the dry-type air-core reactor;

[0273] The encapsulated insulation sample submodule is used to construct a plurality of encapsulated insulation samples according to the insulation structure;

[0274] Aging test submodule, used to perform aging tests on multiple encapsulated insulation samples;

[0275] A grouping submodule, configured to group the plurality of encapsulated insulation samples after the aging test according to a preset grouping rule to obtain a plurality of encapsulated insulation sample groups;

[0276] The preset grouping rule is to select a preset number of encapsulated insulation samples as an encapsulated insulation sample group according to each preset aging cycle.

[0277] Furthermore, the testing module 301 further includes:

[0278] The mechanical testing submodule is used to perform mechanical testing on each encapsulated insulation sample group using an electro-hydraulic servo universal testing machine to obtain the initial elastic modulus value corresponding to each encapsulated insulation sample group;

[0279] The test discharge parameter characteristic submodule is used to perform pressure tests on each encapsulated insulation sample group in sequence to obtain the test discharge parameter characteristics corresponding to each encapsulated insulation sample group;

[0280] The initial discharge parameter characteristic submodule is used to obtain the initial discharge parameter characteristics of the encapsulated insulation sample group in the unaged state;

[0281] The initial insulation degradation degree value submodule is used to determine the initial insulation degradation degree value corresponding to each encapsulated insulation sample group using the discharge parameter characteristics of each test and the initial discharge parameter characteristics.

[0282] Furthermore, the first processing module 302 includes:

[0283] The characteristic operation submodule is used to perform characteristic operation using the discharge parameter characteristics of each test and the initial discharge parameter characteristics to obtain the parameter characteristic values ​​corresponding to each encapsulated insulation sample group;

[0284] The first judgment submodule is used to judge whether the parameter characteristic value meets the preset parameter characteristic condition;

[0285] The preset parameter characteristic condition is that the parameter characteristic value is greater than or equal to the preset characteristic threshold;

[0286] The initial insulation state evaluation group submodule is used to use the encapsulated insulation sample group associated with the parameter characteristic value as the initial insulation state evaluation group if the parameter characteristic value meets the preset parameter characteristic condition;

[0287] The evaluation output submodule is used to use the initial elastic modulus value and the initial insulation degradation degree value associated with each initial insulation state evaluation group as the evaluation elastic modulus value and the evaluation insulation degradation degree value for simulation.

[0288] Furthermore, the second processing module 303 includes:

[0289] A sorting submodule is used to sort the multiple initial insulation state assessment groups according to a preset pressure test sequence, and select the last initial insulation state assessment group subjected to the pressure test as the target insulation state assessment group;

[0290] An initial absolute degradation assessment value submodule, configured to use the initial insulation degradation degree value associated with the target insulation state assessment group as the initial absolute degradation assessment value;

[0291] The target absolute degradation assessment value submodule is used to perform a multiplication operation on the initial absolute degradation assessment value and the preset absolute degradation coefficient to obtain the target absolute degradation assessment value.

[0292] Furthermore, the third processing module 304 includes:

[0293] The electric field and mechanical field simulation submodule is used to perform electric field and mechanical field simulation in the constructed reactor simulation model using multiple evaluated elastic modulus values ​​as input, and obtain the vibration signal distribution of each evaluated elastic modulus value;

[0294] A simulated vibration amplitude submodule is used to select a preset encapsulation height of the dry-type air-core reactor as a signal extraction point based on the distribution of each vibration signal, and obtain the simulated vibration amplitude of the signal extraction point under each evaluated elastic modulus value;

[0295] The simulation state parameter submodule is used to determine the simulation state parameters of each evaluated elastic modulus value using each simulated vibration amplitude.

[0296] Furthermore, the simulation state parameter submodule includes:

[0297] A first difference unit is used to perform a difference operation using the total amplitude of each simulated vibration and the amplitude of each simulated vibration component to obtain a first difference;

[0298] The first ratio unit is used to perform a ratio operation on each first difference and an associated simulated vibration component amplitude to obtain a simulation state parameter of each evaluated elastic modulus value.

[0299] Furthermore, the response module 305 includes:

[0300] A state evaluation instruction submodule is used to respond to a state evaluation instruction of the operating reactor and obtain an operating vibration amplitude of the operating reactor;

[0301] The operating vibration amplitude includes the total operating vibration amplitude and the operating vibration component amplitude;

[0302] A second difference submodule is used to perform a difference operation on the total amplitude of the operating vibration and the amplitude of the operating vibration component to obtain a second difference;

[0303] The second ratio submodule is used to perform a ratio operation on the second difference and the amplitude of the operating vibration component to obtain an operating state parameter of the operating reactor.

[0304] Furthermore, the status output module 306 includes:

[0305] An evaluation matching value submodule is used to determine a plurality of evaluation matching values ​​corresponding to the operating reactor by using the simulated vibration amplitude and the simulated state parameter corresponding to each evaluation elastic modulus value, combined with the operating vibration amplitude and the operating state parameter;

[0306] A minimum value submodule is used to select a minimum value from multiple evaluation matching values ​​and determine an evaluation elastic modulus value associated with the evaluation matching value of the minimum value;

[0307] a matching submodule, configured to match an estimated insulation degradation degree value associated with the estimated elastic modulus value as an actual insulation degradation degree value of the operating reactor;

[0308] The degree value comparison submodule is used to compare the actual insulation degradation degree value with the target absolute degradation assessment value;

[0309] A first comparison result submodule is configured to determine that the operating reactor is not in an absolute degradation state if the actual insulation degradation degree value is less than the target absolute degradation assessment value;

[0310] The second comparison result submodule is used to determine that the operating reactor is in an absolute degradation state if the actual insulation degradation degree value is greater than or equal to the target absolute degradation assessment value.

[0311] Furthermore, it also includes:

[0312] An evaluation simulation vibration amplitude module is used to simulate the reactor simulation model using the evaluation elastic modulus value associated with the target insulation state evaluation group to obtain the evaluation simulation vibration amplitude corresponding to the target insulation state evaluation group;

[0313] A verification simulation vibration amplitude module is used to use the evaluation simulation vibration amplitude as a verification simulation vibration amplitude;

[0314] An initial evaluation vibration amplitude module is used to obtain an initial evaluation vibration amplitude of a target insulation status evaluation group in an unaged state;

[0315] A target health state constant module is used to determine a target health state constant corresponding to a target insulation state assessment group using an initial assessment vibration amplitude and a verification simulation vibration amplitude;

[0316] A post-degradation verification constant module is used to perform a multiplication operation using the target health state constant and a preset constant coefficient to obtain a post-degradation verification constant;

[0317] An operation health state constant module, used for determining an operation health state constant of the operation reactor by using an operation vibration amplitude and an initial evaluation vibration amplitude of the operation reactor in an absolutely degraded state;

[0318] The constant comparison module is used to compare the operating health status constant with the late degradation verification constant, and determine whether the operating inductor is in the late stage of inter-turn insulation degradation based on the comparison result.

[0319] Furthermore, the constant comparison module includes:

[0320] The constant comparison submodule is used to compare the running health status constant with the degradation post-verification constant.

[0321] A first determination submodule is configured to determine that the operating reactor is in the late stage of inter-turn insulation degradation if the health state constant is greater than or equal to the late stage degradation verification constant;

[0322] The second determination submodule is configured to determine that the operating reactor is not in the late stage of inter-turn insulation degradation if the health state constant is less than the late stage degradation verification constant.

[0323] In the present invention, a plurality of encapsulated insulation sample groups of dry-type air-core reactors are obtained, and mechanical tests and insulation tests are performed on each encapsulated insulation sample group to obtain corresponding initial elastic modulus values ​​and initial insulation degradation degree values, and a plurality of encapsulated insulation sample groups that meet preset parameter characteristic conditions are selected as initial insulation state evaluation groups, and the initial elastic modulus values ​​and initial insulation degradation degree values ​​associated with each initial insulation state evaluation group are used as evaluation elastic modulus values ​​and evaluation insulation degradation degree values, based on the initial insulation degradation degree values ​​of the initial insulation state evaluation group, a target insulation state evaluation group is selected from the plurality of initial insulation state evaluation groups, and a target absolute degradation evaluation value of the target insulation state evaluation group is determined, and a plurality of evaluation elastic modulus values ​​are input into a pre-constructed reactor simulation model for simulation to obtain a simulated vibration amplitude, and the corresponding value of each evaluation elastic modulus value is determined according to the simulated vibration amplitude. The simulation state parameters of the operating reactor are used to respond to the state evaluation instruction of the operating reactor, the operating vibration amplitude of the operating reactor is obtained, and the operating vibration amplitude is used to determine the operating state parameters of the operating reactor, and the simulation vibration amplitude and simulation state parameters corresponding to each evaluation elastic modulus value are used. In combination with the operating vibration amplitude and the operating state parameters, the evaluation insulation degradation degree value associated with the evaluation elastic modulus value is matched, and the insulation state of the operating reactor is determined based on the target absolute degradation evaluation value; the present invention is based on the encapsulation structure of the dry-type hollow reactor to carry out the correspondence between the mechanical properties and the insulation properties, establish the association between the mechanical parameters and the insulation parameters of the reactor, and effectively evaluate the insulation state of the reactor at different aging stages by constructing the simulation vibration characteristics output by the simulation model and the collected operation vibration characteristics of the actual operating reactor; it solves the technical problem of how to accurately evaluate the insulation state of the dry-type hollow reactor.

[0324] See also Figure 5 , Figure 5 This is a structural block diagram of a computer device provided in Example 4 of the present invention.

[0325] An electronic device according to an embodiment of the present invention includes: a memory 401 and a processor 402, wherein the memory 402 stores a computer program; when the computer program is executed by the processor 402, the processor 402 executes the dry-type air-core reactor insulation status assessment method as described in any of the above embodiments.

[0326] Memory 401 may be an electronic memory such as flash memory, EEPROM (Electrically Erasable Programmable Read-Only Memory), EPROM, hard disk, or ROM. Memory 401 has storage space 403 for program code 413 for executing any of the method steps described above. For example, storage space 403 for program code may include individual program codes 413 for implementing various steps in the method described above. These program codes may be read from or written to one or more computer program products. These computer program products include program code carriers such as hard disks, compact disks (CDs), memory cards, or floppy disks. The program codes may be compressed, for example, in a suitable format. When executed by a processing device, these codes cause the processing device to execute the various steps in the method described above. These program codes may be read from or written to one or more computer program products. These computer program products include program code carriers such as hard disks, compact disks (CDs), memory cards, or floppy disks. The program codes may be compressed, for example, in a suitable format. When these codes are executed by a computing and processing device, they cause the computing and processing device to execute the various steps of the above-described method for evaluating the insulation state of a dry-type air-core reactor.

[0327] The fifth embodiment of the present invention further provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the method for evaluating the insulation state of a dry-type air-core reactor as described in any of the above embodiments is implemented.

[0328] Embodiment 6 of the present invention also provides a computer program product, which includes a computer program stored on a non-transitory computer-readable storage medium, and the computer program includes program instructions, wherein when the program instructions are executed by a computer, the computer executes the dry-type air-core reactor insulation status assessment method as described in any of the above embodiments.

[0329] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0330] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of units is only a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interface, device or unit, which can be electrical, mechanical or other forms.

[0331] Units described as separate components may or may not be physically separate, and components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0332] In addition, the functional units in the various embodiments of the present invention may be integrated into a single processing unit, each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0333] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the portion that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the various embodiments of the method of the present invention. The aforementioned storage medium includes various media that can store program code, such as USB flash drives, mobile hard drives, read-only memories (ROMs), random access memories (RAMs), magnetic disks, or optical disks.

[0334] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A method for evaluating the insulation status of a dry-type air-core reactor, characterized in that: include: Obtaining multiple encapsulated insulation sample groups of dry-type air-core reactors, and performing mechanical tests and insulation tests on each of the encapsulated insulation sample groups to obtain corresponding initial elastic modulus values ​​and initial insulation degradation degree values; Selecting a plurality of the encapsulated insulation sample groups that meet preset parameter characteristic conditions as initial insulation state evaluation groups, and using the initial elastic modulus value and the initial insulation degradation degree value associated with each of the initial insulation state evaluation groups as the evaluation elastic modulus value and the evaluation insulation degradation degree value; selecting a target insulation state assessment group from a plurality of the initial insulation state assessment groups based on the initial insulation degradation degree values ​​of the initial insulation state assessment groups, and determining a target absolute degradation assessment value of the target insulation state assessment group; Using a plurality of the evaluated elastic modulus values ​​to input a pre-built reactor simulation model for simulation, obtaining a simulated vibration amplitude, and determining a simulation state parameter corresponding to each of the evaluated elastic modulus values ​​according to the simulated vibration amplitude; In response to a state evaluation instruction for an operating reactor, obtaining an operating vibration amplitude of the operating reactor, and determining an operating state parameter of the operating reactor using the operating vibration amplitude; The simulated vibration amplitude and the simulated state parameter corresponding to each of the evaluated elastic modulus values ​​are used, combined with the operating vibration amplitude and the operating state parameter, to match the evaluated insulation degradation degree value associated with the evaluated elastic modulus value, and determine the insulation state of the operating inductor based on the target absolute degradation evaluation value.

2. The dry-type air-core reactor insulation status evaluation method according to claim 1, characterized in that: The method of obtaining a plurality of encapsulated insulation sample groups of dry-type air-core reactors comprises: Obtaining the insulation structure of the dry-type air-core reactor; constructing a plurality of encapsulated insulation specimens according to the insulation structure; performing an aging test on a plurality of the encapsulated insulation samples; Grouping the plurality of encapsulated insulation samples after the aging test according to a preset grouping rule to obtain a plurality of encapsulated insulation sample groups; The preset grouping rule is to select a preset number of the encapsulated insulation samples as one encapsulated insulation sample group according to each preset aging cycle.

3. The dry-type air-core reactor insulation status evaluation method according to claim 1, characterized in that: The mechanical test and insulation test are performed on each of the encapsulated insulation sample groups to obtain the corresponding initial elastic modulus value and initial insulation degradation degree value, including: Performing mechanical testing on each of the encapsulated insulation sample groups using an electro-hydraulic servo universal testing machine to obtain an initial elastic modulus value corresponding to each of the encapsulated insulation sample groups; Performing pressure tests on each of the encapsulated insulation sample groups in sequence to obtain test discharge parameter characteristics corresponding to each of the encapsulated insulation sample groups; Obtaining initial discharge parameter characteristics of the encapsulated insulation sample group in an unaged state; The initial insulation degradation degree values ​​corresponding to the respective encapsulated insulation sample groups are determined by using the test discharge parameter characteristics and the initial discharge parameter characteristics.

4. The dry-type air-core reactor insulation status evaluation method according to claim 3, characterized in that: The step of selecting a plurality of encapsulated insulation sample groups that meet preset parameter characteristic conditions as initial insulation state evaluation groups, and using the initial elastic modulus value and the initial insulation degradation degree value associated with each initial insulation state evaluation group as the evaluation elastic modulus value and the evaluation insulation degradation degree value, comprises: Performing characteristic calculations using the test discharge parameter characteristics and the initial discharge parameter characteristics to obtain parameter characteristic values ​​corresponding to the respective encapsulated insulation sample groups; Determining whether the parameter characteristic value meets the preset parameter characteristic condition; Wherein, the preset parameter characteristic condition is that the parameter characteristic value is greater than or equal to the preset characteristic threshold; If the parameter characteristic value satisfies the preset parameter characteristic condition, the encapsulated insulation sample group associated with the parameter characteristic value is used as the initial insulation state evaluation group; The initial elastic modulus value and the initial insulation degradation degree value associated with each initial insulation state evaluation group are used as the evaluation elastic modulus value and the evaluation insulation degradation degree value for simulation.

5. The dry-type air-core reactor insulation status evaluation method according to claim 1, characterized in that: The step of selecting a target insulation state assessment group from a plurality of the initial insulation state assessment groups based on the initial insulation degradation degree values ​​of the initial insulation state assessment groups, and determining a target absolute degradation assessment value of the target insulation state assessment group comprises: Sorting the plurality of initial insulation state assessment groups according to a preset pressure test sequence, and selecting the last initial insulation state assessment group subjected to the pressure test as the target insulation state assessment group; Using the initial insulation degradation degree value associated with the target insulation state assessment group as an initial absolute degradation assessment value; The initial absolute degradation assessment value is multiplied by a preset absolute degradation coefficient to obtain a target absolute degradation assessment value.

6. The dry-type air-core reactor insulation status evaluation method according to claim 1, characterized in that: The method of using a plurality of the evaluated elastic modulus values ​​to input a pre-built reactor simulation model for simulation to obtain a simulated vibration amplitude, and determining a simulation state parameter corresponding to each of the evaluated elastic modulus values ​​according to the simulated vibration amplitude, includes: Using a plurality of the evaluated elastic modulus values ​​as input into a constructed reactor simulation model to perform electric field and mechanical field simulations, and obtain a vibration signal distribution of each of the evaluated elastic modulus values; Based on the distribution of each vibration signal, a preset encapsulation height of the dry-type air-core reactor is selected as a signal extraction point, and a simulated vibration amplitude of the signal extraction point under each of the evaluated elastic modulus values ​​is obtained; The simulated vibration amplitudes are used to determine the simulated state parameters of the evaluated elastic modulus values.

7. The dry-type air-core reactor insulation status evaluation method according to claim 6, characterized in that: The simulated vibration amplitude includes a simulated vibration total amplitude and a simulated vibration component amplitude. The use of each simulated vibration amplitude to determine the simulation state parameter for each evaluated elastic modulus value includes: Performing a difference operation using the simulated vibration total amplitude and the simulated vibration component amplitude to obtain a first difference; A ratio operation is performed between each of the first differences and the associated amplitude of the simulated vibration component to obtain a simulation state parameter of each of the evaluated elastic modulus values.

8. The dry-type air-core reactor insulation status evaluation method according to claim 1, characterized in that: The step of responding to the state evaluation instruction for the operating reactor, obtaining the operating vibration amplitude of the operating reactor, and determining the operating state parameter of the operating reactor by using the operating vibration amplitude includes: In response to a state evaluation instruction for an operating reactor, obtaining an operating vibration amplitude of the operating reactor; Wherein, the operating vibration amplitude includes the total operating vibration amplitude and the operating vibration component amplitude; Performing a difference operation on the total amplitude of the operating vibration and the amplitude of the operating vibration component to obtain a second difference; The operating state parameter of the operating reactor is obtained by performing a ratio operation on the second difference and the amplitude of the operating vibration component.

9. The dry-type air-core reactor insulation status evaluation method according to claim 1, characterized in that: The method of using the simulated vibration amplitude and the simulated state parameter corresponding to each of the evaluated elastic modulus values, combining the operating vibration amplitude and the operating state parameter, matching the evaluated insulation degradation degree value associated with the evaluated elastic modulus value, and determining the insulation state of the operating reactor based on the target absolute degradation evaluation value includes: Determining a plurality of evaluation matching values ​​corresponding to the operating reactor by using the simulated vibration amplitude and the simulated state parameter corresponding to each of the evaluated elastic modulus values, in combination with the operating vibration amplitude and the operating state parameter; Selecting a minimum value from the plurality of evaluated matching values, and determining the evaluated elastic modulus value associated with the evaluated matching value of the minimum value; matching an estimated insulation degradation degree value associated with the estimated elastic modulus value as an actual insulation degradation degree value of the operating reactor; comparing the actual insulation degradation degree value with the target absolute degradation assessment value; If the actual insulation degradation degree value is less than the target absolute degradation assessment value, it is determined that the operating reactor is not in an absolute degradation state; If the actual insulation degradation degree value is greater than or equal to the target absolute degradation evaluation value, it is determined that the operating reactor is in an absolute degradation state.

10. The dry-type air-core reactor insulation status evaluation method according to claim 1, characterized in that: Also includes: Simulating the reactor simulation model using the evaluated elastic modulus value associated with the target insulation state evaluation group to obtain an evaluated simulated vibration amplitude corresponding to the target insulation state evaluation group; Using the evaluation simulation vibration amplitude as the verification simulation vibration amplitude; Obtaining an initial evaluation vibration amplitude of the target insulation status evaluation group in an unaged state; Determining a target health state constant corresponding to the target insulation state assessment group using the initial assessment vibration amplitude and the verification simulation vibration amplitude; Performing a multiplication operation using the target health state constant and a preset constant coefficient to obtain a degradation post-verification constant; determining an operating health state constant of the operating reactor using the operating vibration amplitude and the initial evaluation vibration amplitude of the operating reactor in an absolutely degraded state; The operating health state constant is compared with the late degradation verification constant, and whether the operating reactor is in the late turn insulation degradation stage is determined according to the comparison result.

11. The method for evaluating the insulation status of a dry-type air-core reactor according to claim 10, wherein: The comparing the operating health state constant with the late degradation verification constant and determining whether the operating reactor is in the late turn insulation degradation stage according to the comparison result includes: comparing the operational health status constant with the post-degradation verification constant; If the health state constant is greater than or equal to the late degradation verification constant, it is determined that the operating reactor is in the late turn insulation degradation stage; If the health state constant is less than the late degradation verification constant, it is determined that the operating reactor is not in the late stage of inter-turn insulation degradation.

12. A dry-type air-core reactor insulation status assessment system, characterized in that: include: A testing module is used to obtain multiple encapsulated insulation sample groups of dry-type air-core reactors, and perform mechanical tests and insulation tests on each of the encapsulated insulation sample groups to obtain corresponding initial elastic modulus values ​​and initial insulation degradation degree values; a first processing module, configured to select a plurality of the encapsulated insulation sample groups that meet preset parameter characteristic conditions as initial insulation state evaluation groups, and use the initial elastic modulus value and the initial insulation degradation degree value associated with each of the initial insulation state evaluation groups as an evaluation elastic modulus value and an evaluation insulation degradation degree value; a second processing module, configured to select a target insulation state assessment group from a plurality of the initial insulation state assessment groups based on the initial insulation degradation degree values ​​of the initial insulation state assessment groups, and determine a target absolute degradation assessment value of the target insulation state assessment group; a third processing module, configured to use the plurality of evaluated elastic modulus values ​​to input a pre-built reactor simulation model for simulation, obtain a simulated vibration amplitude, and determine a simulation state parameter corresponding to each of the evaluated elastic modulus values ​​according to the simulated vibration amplitude; a response module, configured to respond to a state evaluation instruction for an operating reactor, obtain an operating vibration amplitude of the operating reactor, and determine an operating state parameter of the operating reactor using the operating vibration amplitude; A state output module is used to use the simulated vibration amplitude and the simulated state parameter corresponding to each of the evaluated elastic modulus values, combined with the operating vibration amplitude and the operating state parameter, to match the evaluated insulation degradation degree value associated with the evaluated elastic modulus value, and determine the insulation state of the operating inductor based on the target absolute degradation evaluation value.

13. An electronic device, characterized in that: The invention comprises a memory and a processor, wherein a computer program is stored in the memory, and when the computer program is executed by the processor, the processor executes the steps of the method for evaluating the insulation state of a dry-type air-core reactor according to any one of claims 1 to 11.

14. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed, the method for evaluating the insulation state of a dry-type air-core reactor according to any one of claims 1 to 11 is implemented.

15. A computer program product, characterized in that The computer program product includes a computer program stored on a non-transitory computer-readable storage medium, wherein the computer program includes program instructions, wherein when the program instructions are executed by a computer, the computer is caused to execute the method for evaluating the insulation condition of a dry-type air-core reactor according to any one of claims 1 to 11.

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