Method and system for evaluating insulation state of dry-type air-core reactor

Abstract

The invention relates to the technical field of electric reactor fault detection, and discloses a dry-type air-core electric reactor insulation state evaluation method and system, and the method comprises the steps: carrying out the corresponding relation between the mechanical performance and the insulation performance based on a packaging structure of a dry-type air-core electric reactor, building the correlation between the mechanical parameter and the insulation parameter of the electric reactor, and carrying out the evaluation of the insulation state of the dry-type air-core electric reactor. The insulation states of the electric reactor in different aging stages are effectively evaluated through simulation vibration characteristics output by constructing a simulation model and collected operation vibration characteristics of the electric reactor in actual operation; the technical problem of how to accurately evaluate the insulation state of the dry-type air-core reactor is solved.

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, especially in high-voltage DC transmission converter stations, due to their stable inductance, low loss, and easy maintenance. The safe and stable operation of dry-type air-core reactors plays an important role in ensuring the quality of power supply to the power grid.

[0003] Dry-type air-core reactors are subjected to various stresses such as electric heat machines during operation. Among them, thermal aging caused by operating temperature rise has a particularly significant impact on their insulation performance. The inter-turn insulation gradually ages and fails due to heat, which leads to inter-turn short-circuit failures. According to existing engineering experience, many accidents of reactor damage, failure, and even fire and burning are caused by inter-turn short-circuit failures. Therefore, it is of great significance to carry out effective monitoring and evaluation of the inter-turn insulation status of dry-type air-core reactors. Changes in the degradation state of inter-turn insulation will lead to changes in the materials and mechanical structures of the reactors, and then changes in the characteristic parameters of the corresponding electric heat machines. By detecting the corresponding characteristic signals, the insulation status can be monitored.

[0004] According to the different characteristic parameters and criteria selected, the existing detection methods for inter-turn short-circuit faults of dry-type air-core reactors include pulse oscillation method, temperature monitoring method, impedance monitoring and space magnetic field monitoring method. The high-frequency pulse oscillation method determines the occurrence of inter-turn short-circuit faults based on the change in inductance before and after the short circuit of the reactor. It is widely used due to its high accuracy. However, this method is an offline detection method that will cause equipment shutdown, and the high-frequency oscillation voltage applied during the detection process is prone to damage the reactor, which has certain limitations. Inter-turn short circuits will cause the temperature of the short-circuit part to rise rapidly. The monitoring of inter-turn short circuit faults can be achieved through temperature measurement, but the commonly used infrared temperature imaging instrument can only measure the outer layer of the reactor envelope temperature. The embedded optical fiber sensor changes the manufacturing process of the reactor and increases the cost. Therefore, it is difficult to promote inter-turn short circuits on a large scale through temperature monitoring. Turn-to-turn short-circuit faults can change the equivalent electrical parameters of dry-type air-core reactors, and the rate of change of equivalent resistance is usually much greater than the rate of change of equivalent inductance. Therefore, many scholars have proposed fault monitoring methods based on impedance changes during turn-to-turn short-circuit. However, grid frequency fluctuations can cause large errors in the measurement of reactor impedance and power angle, and the complex electromagnetic environment of substations places high demands on the anti-interference ability of voltage and current sensors. Turn-to-turn short-circuit fault monitoring based on spatial magnetic field uses the change in spatial magnetic field distribution caused by short-circuit current to achieve online monitoring, but this method is difficult to locate faults, and due to the large number of influencing factors of spatial magnetic field, and the high requirements for anti-interference ability of data transmission during measurement, it is also difficult to promote and use.

[0005] Therefore, the existing dry-type air-core reactor insulation state detection is mainly based on the changes in reactor impedance, temperature and spatial magnetic field before and after short circuit. The above characteristic parameters are not sensitive to the changes in the inter-turn insulation state of the reactor, and cannot evaluate the insulation state in the early stage of inter-turn insulation degradation and prevent short-circuit faults. The high-frequency pulse oscillation method is an offline detection method, which requires stopping the normal operation of the reactor and causes certain damage to the reactor. It has low feasibility and high maintenance cost. Therefore, there is an urgent need for a turn-to-turn insulation state assessment method that is sensitive, reliable, resistant to strong magnetic field interference, and can characterize the degree of insulation degradation in real time, so as to achieve reliable monitoring of the insulation performance of the reactor encapsulation and avoid the occurrence of inter-turn short-circuit fire accidents. Summary of the invention

[0006] The 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 the dry-type air-core reactor.

[0007] A first aspect of the present invention provides a method for evaluating the insulation status 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 values ​​and the initial insulation degradation degree values ​​associated with each of the initial insulation state evaluation groups as evaluation elastic modulus values ​​and evaluation insulation degradation degree values;

[0010] Based on the initial insulation degradation degree value of the initial insulation state assessment group, selecting a target insulation state assessment group from a plurality 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, an operating vibration amplitude of the operating reactor is acquired, and an operating state parameter of the operating reactor is determined by 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] Among them, 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, the mechanical test and the insulation test are respectively performed on each of the encapsulated insulation sample groups to obtain the corresponding initial elastic modulus value and initial insulation degradation degree value, including:

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

[0022] Performing pressure tests on each of the encapsulated insulation sample groups in turn 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 each of the 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 satisfying preset parameter characteristic conditions as initial insulation state evaluation groups, and using the initial elastic modulus values ​​and the initial insulation degradation degree values ​​associated with each of the initial insulation state evaluation groups as evaluation elastic modulus values ​​and evaluation insulation degradation degree values, comprises:

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

[0027] Determining whether the parameter characteristic value meets a 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 an initial insulation state evaluation group;

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

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

[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 simulation, and obtain the 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 evaluated elastic modulus value 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 difference values ​​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, in response to the state evaluation instruction for the operating reactor, acquiring 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 running vibration amplitude and the running vibration component amplitude 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 of 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] Determine a plurality of evaluation matching values ​​corresponding to the operating reactor by using the simulation vibration amplitude and the simulation state parameter corresponding to each of the evaluation elastic modulus values, in combination with the operation vibration amplitude and the operation state parameter;

[0049] Select a minimum value from the plurality of evaluation matching values, and determine the evaluation elastic modulus value associated with the evaluation 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] The reactor simulation model is simulated using the evaluation elastic modulus value associated with the target insulation state evaluation group to obtain an evaluation simulation 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] Determine a target health state constant corresponding to the target insulation state assessment group by using the initial assessment vibration amplitude and the verification simulation vibration amplitude;

[0059] The target health state constant and a preset constant coefficient are used to perform a multiplication operation to obtain a degradation post-verification constant;

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

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

[0062] Optionally, comparing the operation health state constant with the late-stage degradation verification constant, and determining whether the operation reactor is in the late stage of turn-to-turn insulation degradation 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 stage degradation verification constant, it is determined that the operating reactor is in the late stage of turn-to-turn insulation degradation;

[0065] If the health state constant is less than the late stage degradation verification constant, it is determined that the operating reactor is not in the late stage of turn-to-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 test module, 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, used for selecting a plurality of the encapsulated insulation sample groups satisfying preset parameter characteristic conditions as initial insulation state evaluation groups, and using the initial elastic modulus values ​​and the initial insulation degradation degree values ​​associated with each of the initial insulation state evaluation groups as evaluation elastic modulus values ​​and evaluation insulation degradation degree values;

[0069] A second processing module is used 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 value of the initial insulation state assessment group, and determine a target absolute degradation assessment value of the target insulation state assessment group;

[0070] A third processing module is used to use a plurality of the 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, used for responding to a state evaluation instruction of an operating reactor, obtaining an operating vibration amplitude of the operating reactor, and determining an operating state parameter of the operating reactor by using the operating vibration amplitude;

[0072] A state output module is used to adopt 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, 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 dry-type air-core reactor insulation state evaluation method 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 respectively 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 used to input a pre-constructed reactor simulation model for simulation to obtain a simulated vibration amplitude, and the corresponding absolute degradation evaluation value of each evaluation elastic modulus value is determined according to the simulated vibration amplitude. The simulation state parameters are used to respond to the state evaluation instruction of the running reactor, the running vibration amplitude of the running reactor is obtained, and the running vibration amplitude is used to determine the running state parameters of the running reactor, and the simulation vibration amplitude and the simulation state parameters corresponding to each evaluation elastic modulus value are used, and the evaluation insulation degradation degree value associated with the evaluation elastic modulus value is matched in combination with the operation vibration amplitude and the operation state parameter, and the insulation state of the running reactor is determined based on the target absolute degradation evaluation value; the present invention is based on the encapsulation structure of the dry-type air-core 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 running reactor; the technical problem of how to accurately evaluate the insulation state of the dry-type air-core reactor is solved. 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 drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 creative labor.

[0079] Figure 1A flowchart of a method for evaluating the insulation status of a dry-type air-core reactor provided in Embodiment 1 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 Embodiment 2 of the present invention;

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

[0082] Figure 4 A structural block diagram of a dry-type air-core reactor insulation status assessment system provided in Embodiment 3 of the present invention;

[0083] Figure 5 This is a structural block diagram of a computer device provided in Embodiment 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 creative work are within the scope of protection of the present invention.

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

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

[0088] Step 101: 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.

[0089] Dry-type air-core reactor refers to a passive electrical device used in power systems, mainly used to control and adjust the voltage, current and power factor in the circuit. The main part is a hollow coil, usually composed of multiple layers of windings, and the windings are isolated by insulating materials. 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 a 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 manufactured 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 property 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 values ​​and initial insulation degradation degree values ​​associated with each initial insulation state evaluation group as evaluation elastic modulus values ​​and evaluation insulation degradation degree values.

[0094] In an embodiment of the present invention, a sealed insulation sample group that meets preset parameter characteristic conditions is screened out from multiple sealed insulation sample groups as an initial insulation state evaluation group. Since each initial insulation state evaluation group is actually an sealed 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 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 , using multiple 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 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. The high-fidelity simulation model is based on the real 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 100 Hz frequency component amplitude.

[0100] The simulation state parameter is a simulation parameter for detecting the healthy state of the inter-turn insulation of the reactor obtained by calculating 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-constructed 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 according to the simulated vibration amplitude.

[0102] Step 105 , in response to the state evaluation instruction for the operating reactor, obtaining the operating vibration amplitude of the operating reactor, and using the operating vibration amplitude to determine the operating state parameter of the operating reactor.

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

[0104] The operating status parameter refers to the operating parameter for detecting the healthy state of the inter-turn insulation of the reactor 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, using the simulated vibration amplitude and simulated state parameters corresponding to each evaluated elastic modulus value, combined with the operating vibration amplitude and the 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 reactor 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 reactor 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 respectively 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 used to input a pre-constructed reactor simulation model for simulation to obtain a simulated vibration amplitude, and the corresponding absolute degradation evaluation value of each evaluation elastic modulus value is determined according to the simulated vibration amplitude. The simulation state parameters are used to respond to the state evaluation instruction of the running reactor, the running vibration amplitude of the running reactor is obtained, and the running vibration amplitude is used to determine the running state parameters of the running reactor, and the simulation vibration amplitude and the simulation state parameters corresponding to each evaluation elastic modulus value are used, and the evaluation insulation degradation degree value associated with the evaluation elastic modulus value is matched in combination with the operation vibration amplitude and the operation state parameter, and the insulation state of the running reactor is determined based on the target absolute degradation evaluation value; the present invention is based on the encapsulation structure of the dry-type air-core 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 running reactor; the technical problem of how to accurately evaluate the insulation state of the dry-type air-core reactor is solved.

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

[0110] The present invention provides a method for evaluating the insulation state 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, and the wire-polyester film-epoxy resin structure refers to 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 the 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 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] Among them, 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 the embodiment of the present invention, each aging cycle is set to 24 hours. 3n+3 turn-to-turn insulation samples (n≤15) are prepared, and 3 unaged samples are taken as controls. After each heat aging cycle, 3 samples are taken out and recorded as the 1st, 2nd…i…nth groups of samples in sequence, thereby obtaining multiple encapsulated insulation sample groups.

[0123] Step 202: 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.

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

[0125] S21. Perform mechanical tests on each encapsulated insulation sample group using an electro-hydraulic servo universal testing machine to obtain initial elastic modulus values ​​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 insulating sample groups obtained in step 201 are tested, and the elastic modulus is selected as the characterization parameter of the mechanical properties of the insulating sample, which is denoted as E i (i=0,1,2…n), where E0 is the elastic modulus value of the inter-turn insulation in the unaged state. The elastic modulus value of the sample 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 turn to obtain test discharge parameter characteristics 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, the two ends of the sample are connected and pressurized, 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 test discharge parameter characteristics of the above encapsulated insulation sample are average values, such as the discharge voltage U start i , then the discharge voltages of the three encapsulated insulation samples in each group of encapsulated insulation samples are 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, and 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 states respectively.

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

[0137] 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 initial insulation degradation degree value can be as follows:

[0138]

[0139] In the formula, It represents 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 , selecting multiple encapsulated insulation sample groups that meet preset parameter characteristic conditions as initial insulation state evaluation groups, and using the initial elastic modulus values ​​and initial insulation degradation degree values ​​associated with each initial insulation state evaluation group as evaluation elastic modulus values ​​and evaluation insulation degradation degree values.

[0141] Further, 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, 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 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] In the formula, 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, the test discharge parameter characteristics and the initial discharge parameter characteristics corresponding to each encapsulated insulation sample group are used to perform characteristic calculations to obtain parameter characteristic values ​​corresponding to each encapsulated insulation sample group.

[0150] S32, judging 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 value meets the preset parameter characteristic condition, 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 discarded.

[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 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.

[0164] Further, 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 of pressure testing of 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 samples after the target insulation status evaluation group k have been aged seriously, when doing the status evaluation, the kth group is taken as the final state of the insulation parameters of the present invention.

[0169] S42. Using 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 multiplication operation on the initial absolute degradation assessment value and the preset absolute degradation coefficient to obtain a target absolute degradation assessment value.

[0172] 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 target absolute degradation evaluation value can be calculated as follows:

[0173]

[0174] In the formula, 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 , using multiple evaluation 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 evaluation elastic modulus value according to the simulated vibration amplitude.

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

[0177] S51. Use multiple evaluated elastic modulus values ​​to input into the constructed reactor simulation model to perform electric field and mechanical field simulation, and obtain the vibration signal distribution of 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 encapsulation height of the lower end of the reactor is taken as the signal extraction point M, where the i-th evaluation elastic modulus value E i The corresponding total simulated vibration amplitude and 100Hz simulated vibration component amplitude are denoted as A -FEAS i and A -FEA i (i=0,1,2…k).

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

[0182] Further, the simulated vibration amplitude includes a simulated vibration total amplitude and a simulated vibration component amplitude, and 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 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] In the formula, 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] Further, step 206 may include the following sub-steps:

[0190] S61, in response to the state evaluation instruction of the operating reactor, obtaining the 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 running reactor, through the reactor vibration signal acquisition system, refer to Figure 3 The reactor vibration signal acquisition system 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 0-1kHz low-pass filter, 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 and B respectively. S and A.

[0193] S62, 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.

[0194] S63, performing 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 running state parameter can be as follows:

[0196]

[0197] In the formula, Indicates the running status parameter.

[0198] Step 207, using the simulated vibration amplitude and simulated state parameters corresponding to each evaluated elastic modulus value, combined with the operating vibration amplitude and the 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 reactor based on the target absolute degradation evaluation value.

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

[0200] S71. 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, determine a plurality of evaluated matching values ​​corresponding to the operating reactor.

[0201] 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 evaluating the matching value can be as follows:

[0202]

[0203] In the formula, 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 multiple evaluation matching values, and determine an evaluation elastic modulus value associated with the evaluation 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 estimated insulation degradation degree value TID associated with the closest i-th estimated 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 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 it is only judged whether the operating reactor is in an absolutely degraded state, and the following steps are the later stage of judging whether it is in an absolutely degraded state.

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

[0219] Step 208: Use the evaluation elastic modulus value associated with the target insulation state evaluation group to simulate the reactor simulation model 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 evaluation simulation vibration amplitude as the verification simulation 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 an unaged 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, and the initial evaluation vibration amplitude includes the initial evaluation vibration total 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 total amplitude of the verified simulation vibration and the amplitude of the verified simulation vibration component 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 an evaluation harmonic distortion rate corresponding to the target insulation state 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, in order 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] In the formula, 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 using the target health status constant and the preset constant coefficient to obtain a post-degradation verification constant.

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

[0239] 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 offset rate verification constant and the distortion rate verification constant can be as follows:

[0240]

[0241]

[0242] In the formula, Represents the offset rate verification constant, Represents the distortion rate verification constant, and 0.85 represents the preset constant coefficient;

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

[0244] The operation health status constants include the deviation rate operation constant and the distortion rate operation 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, 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 offset rate running constant and the distortion rate running constant can be as follows:

[0247]

[0248]

[0249] In the formula, represents the offset rate operating constant, Represents the distortion rate operating constant.

[0250] Step 2014: compare the running health status constant with the late stage degradation verification constant, and determine whether the running reactor is in the late stage of inter-turn insulation degradation according to the comparison result.

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

[0252] S81. Compare the operating 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 stage 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 packaged into 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 stage 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 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.

[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 respectively 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 used to input a pre-constructed reactor simulation model for simulation to obtain a simulated vibration amplitude, and the corresponding absolute degradation evaluation value of each evaluation elastic modulus value is determined according to the simulated vibration amplitude. The simulation state parameters are used to respond to the state evaluation instruction of the running reactor, the running vibration amplitude of the running reactor is obtained, and the running vibration amplitude is used to determine the running state parameters of the running reactor, and the simulation vibration amplitude and the simulation state parameters corresponding to each evaluation elastic modulus value are used, and the evaluation insulation degradation degree value associated with the evaluation elastic modulus value is matched in combination with the operation vibration amplitude and the operation state parameter, and the insulation state of the running reactor is determined based on the target absolute degradation evaluation value; the present invention is based on the encapsulation structure of the dry-type air-core 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 running reactor; the technical problem of how to accurately evaluate the insulation state of the dry-type air-core reactor is solved.

[0262] It is worth mentioning that the vibration amplitude signal analysis method used in this method has no direct electrical connection with the system, is easy to implement online detection, and can sensitively reflect the mechanical state of the reactor winding. For any type of dry-type air-core reactor, this method can better realize reliable monitoring and evaluation of the insulation state 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 Embodiment 3 of the present invention.

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

[0265] The test 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] The first processing module 302 is used to 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 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 used to select a target insulation state assessment group from multiple initial insulation state assessment groups based on the initial insulation degradation degree value of the initial insulation state assessment group, and determine a target absolute degradation assessment value of the target insulation state assessment group;

[0268] The third processing module 304 is used to use multiple evaluation 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 evaluation elastic modulus value according to the simulated vibration amplitude;

[0269] A response module 305 is used to respond to the state evaluation instruction of the operating reactor, obtain the operating vibration amplitude of the operating reactor, and determine the operating state parameter of the operating reactor by 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 the 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 test 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] An aging test submodule is used to perform aging tests on multiple encapsulated insulation samples;

[0275] A grouping submodule, used for grouping a 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] Among them, 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 also includes:

[0278] The mechanical test submodule is used to perform mechanical tests 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 turn 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 an 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 by 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 characteristics of each test discharge parameter and the characteristics of the initial discharge parameter 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] Among them, 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, used to 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;

[0290] An initial absolute degradation assessment value submodule, used 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] Further, 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 by inputting multiple evaluated elastic modulus values, 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 evaluation elastic modulus value by using each simulation vibration amplitude.

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

[0297] A first difference unit is used to perform a difference operation using each simulated vibration total amplitude and each simulated vibration component amplitude 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] Further, 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 using 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] Further, the status output module 306 includes:

[0305] An evaluation matching value submodule, for 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 evaluation elastic modulus value, combined with the operating vibration amplitude and the operating state parameter;

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

[0307] A matching submodule, used for 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;

[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 used 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 state evaluation group in an unaged state;

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

[0316] A post-degradation verification constant module is used to perform multiplication operation using a 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 running health status constant with the late stage degradation verification constant, and determine whether the running reactor is in the late stage of inter-turn insulation degradation according to 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] The first determination submodule is used 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 used 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 respectively 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 used to input a pre-constructed reactor simulation model for simulation to obtain a simulated vibration amplitude, and the corresponding absolute degradation evaluation value of each evaluation elastic modulus value is determined according to the simulated vibration amplitude. The simulation state parameters are used to respond to the state evaluation instruction of the running reactor, the running vibration amplitude of the running reactor is obtained, and the running vibration amplitude is used to determine the running state parameters of the running reactor, and the simulation vibration amplitude and the simulation state parameters corresponding to each evaluation elastic modulus value are used, and the evaluation insulation degradation degree value associated with the evaluation elastic modulus value is matched in combination with the operation vibration amplitude and the operation state parameter, and the insulation state of the running reactor is determined based on the target absolute degradation evaluation value; the present invention is based on the encapsulation structure of the dry-type air-core 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 running reactor; the technical problem of how to accurately evaluate the insulation state of the dry-type air-core reactor is solved.

[0324] See also Figure 5 , Figure 5 This is a structural block diagram of a computer device provided in Embodiment 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 state assessment method as described in any of the above embodiments.

[0326] The memory 401 may be an electronic memory such as a flash memory, an EEPROM (electrically erasable programmable read-only memory), an EPROM, a hard disk or a ROM. The memory 401 has a storage space 403 for a program code 413 for executing any method step in the above method. For example, the storage space 403 for the program code may include individual program codes 413 for implementing the various steps in the above method, respectively. 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 code may be compressed, for example, in an appropriate form. When these codes are run by a computing and processing device, the computing and processing device performs 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 code may be compressed, for example, in an appropriate form. When these codes are executed by a computing and processing device, they cause the computing and processing device to execute the various steps in the above-described dry-type air-core reactor insulation state evaluation method.

[0327] Embodiment 5 of the present invention further provides a computer-readable storage medium on which a computer program is stored. 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 a method for evaluating the insulation state of a dry-type air-core reactor as described in any of the above embodiments.

[0329] Those skilled in the art can 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 the present 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 only schematic. For example, the division of units is only a logical function division. There may be other division methods in actual implementation. For example, 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 interfaces, devices or units, which can be electrical, mechanical or other forms.

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

[0332] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0333] If the integrated unit is implemented in the form of 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, in essence, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods of each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[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 the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. 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 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 values ​​and the initial insulation degradation degree values ​​associated with each of the initial insulation state evaluation groups as evaluation elastic modulus values ​​and evaluation insulation degradation degree values; Based on the initial insulation degradation degree value of the initial insulation state assessment group, selecting a target insulation state assessment group from a plurality 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, an operating vibration amplitude of the operating reactor is acquired, and an operating state parameter of the operating reactor is determined by 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; Among them, 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 respectively 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 tests on each of the encapsulated insulation sample groups using an electro-hydraulic servo universal testing machine to obtain initial elastic modulus values ​​corresponding to each of the encapsulated insulation sample groups; Conducting pressure tests on each of the encapsulated insulation sample groups in turn 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 each of the 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 each of the encapsulated insulation sample groups; Determining whether the parameter characteristic value meets a 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 an initial insulation state evaluation group; The initial elastic modulus value and the initial insulation degradation degree value associated with each of the initial insulation state evaluation groups are used as the evaluation elastic modulus value and the evaluation insulation degradation degree value used 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 value of the initial insulation state assessment group, 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 simulation, and obtain the 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 evaluated elastic modulus value 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, and the use of each simulated vibration amplitude to determine the simulation state parameter of 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 difference values ​​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 of the operating reactor, acquiring the operating vibration amplitude of the operating reactor, and using the operating vibration amplitude to determine the operating state parameter of the operating reactor 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 running vibration amplitude and the running vibration component amplitude 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: Determine a plurality of evaluation matching values ​​corresponding to the operating reactor by using the simulation vibration amplitude and the simulation state parameter corresponding to each of the evaluation elastic modulus values, in combination with the operation vibration amplitude and the operation state parameter; Select a minimum value from the plurality of evaluation matching values, and determine the evaluation elastic modulus value associated with the evaluation 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: The reactor simulation model is simulated using the evaluation elastic modulus value associated with the target insulation state evaluation group to obtain an evaluation simulation 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; Determine a target health state constant corresponding to the target insulation state assessment group by using the initial assessment vibration amplitude and the verification simulation vibration amplitude; The target health state constant and a preset constant coefficient are used to perform a multiplication operation to obtain a degradation post-verification constant; Determining an operation health state constant of the operation reactor using the operation vibration amplitude and the initial evaluation vibration amplitude of the operation reactor in an absolutely degraded state; The operating health status constant is compared with the late degradation verification constant, and whether the operating reactor is in the late stage of inter-turn insulation degradation is determined according to the comparison result.

11. The dry-type air-core reactor insulation status evaluation method according to claim 10, characterized in that: The comparing the running health state constant with the late-stage degradation verification constant, and determining whether the running reactor is in the late stage of turn-to-turn insulation degradation 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 stage degradation verification constant, it is determined that the operating reactor is in the late stage of turn-to-turn insulation degradation; If the health state constant is less than the late stage degradation verification constant, it is determined that the operating reactor is not in the late stage of turn-to-turn insulation degradation.

12. A dry-type air-core reactor insulation status assessment system, characterized in that: include: A test module, 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, used for selecting a plurality of the encapsulated insulation sample groups satisfying preset parameter characteristic conditions as initial insulation state evaluation groups, and using the initial elastic modulus values ​​and the initial insulation degradation degree values ​​associated with each of the initial insulation state evaluation groups as evaluation elastic modulus values ​​and evaluation insulation degradation degree values; A second processing module is used 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 value of the initial insulation state assessment group, and determine a target absolute degradation assessment value of the target insulation state assessment group; A third processing module is used to use a plurality of the 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, used for responding to a state evaluation instruction of an operating reactor, obtaining an operating vibration amplitude of the operating reactor, and determining an operating state parameter of the operating reactor by using the operating vibration amplitude; A state output module is used to adopt 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, 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: It 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 as described in 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 status of a dry-type air-core reactor as described in any one of claims 1 to 11 is implemented.

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

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