Dielectric loss abnormity processing method and equipment for transformer insulating oil
By obtaining the physical and chemical and polar material parameters of the transformer insulating oil, refine and analyze and targeted processing, the problem of difficulty in positioning is solved due to dielectric loss abnormalities, and the maintenance level of the insulating oil and the stability of the transformer is improved.
Patent Information
- Application Number
- CN202411255249.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-09
- Publication Date
- 2024-12-31
AI Technical Summary
The reasons for abnormal dielectric loss value of transformer insulating oil are complex, and existing detection standards and technical means are difficult to quickly and accurately locate the specific cause of the failure. Rampant treatment may break the internal balance, resulting in an increase in dielectric loss value.
By obtaining the physical and chemical parameters of the transformer insulating oil, preliminary judgment of its use; if there is no abnormality, further obtain polar material parameters and analyze them in detail; if the dielectric loss result is abnormal, targeted treatment is carried out according to the polar material parameters, such as acid treatment and Adsorbent treatment is used to repair dielectric loss abnormalities.
It realizes rapid detection and accurate identification of the causes of abnormal dielectric loss of transformer insulation oil, and conducts targeted processing, improves the level of maintenance and management, and ensures the stable operation of the transformer.
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Figure CN119230251A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of transformer mineral insulating oil fault processing, and in particular to a method and equipment for processing abnormal dielectric loss of transformer insulating oil. Background Art
[0002] Transformer insulating oil is an important insulating material and cooling medium in power transformers. During the operation of the transformer, the insulating oil not only bears the dual functions of heat dissipation and insulation, but also plays a role in suppressing partial discharge and arcing. The dielectric loss factor (dissipation value) of transformer insulating oil, as an important indicator reflecting the performance of insulating oil, has always been the focus of attention in the power industry. The dielectric loss value can not only reflect the insulation characteristics and aging degree of transformer insulating oil, but also reveal whether the insulating oil is contaminated by polar impurities and charged colloids. For a long time, the power industry has experienced a process of gradual development from simple electrical testing to complex multi-parameter monitoring systems in terms of transformer insulating oil dielectric loss detection technology.
[0003] At present, the dielectric loss detection technology of transformer insulating oil is relatively mature, mainly including online monitoring technology and offline detection technology. Online monitoring technology detects the change of dielectric loss value of insulating oil in real time by installing sensors inside the transformer, and can provide timely feedback on the operating status of the transformer through data transmission and analysis system. Offline detection technology mainly relies on on-site sampling and uses special test instruments such as dielectric loss tester for measurement.
[0004] However, the reasons for abnormal dielectric loss values of transformer insulating oil are complex and diverse, and existing testing standards and technical means are difficult to quickly and accurately locate the specific cause of the fault. In addition, when the dielectric loss value is abnormal, rashly performing treatments such as vacuum oil filtration may not only fail to solve the problem, but may also break the relative balance of pollutants inside the transformer, causing the dielectric loss value to become higher. Therefore, how to quickly and accurately identify the reasons for abnormal dielectric loss values of transformer insulating oil has become a problem that needs to be solved urgently. Summary of the invention
[0005] The main purpose of the present invention is to propose a method and device for processing abnormal dielectric loss of transformer insulating oil, aiming to solve the technical problem that the causes of abnormal dielectric loss value of transformer insulating oil in the prior art are complex and diverse, and the existing detection standards and technical means are difficult to quickly and accurately locate the specific cause of the fault.
[0006] To achieve the above object, the present invention provides a method for processing abnormal dielectric loss of transformer insulating oil, and the method comprises:
[0007] Obtaining physical and chemical parameters of the transformer insulating oil;
[0008] Obtaining a first dielectric loss result of the transformer insulating oil according to the physical and chemical parameters;
[0009] If the first dielectric loss result is normal, obtaining the polar material parameters of the transformer insulating oil;
[0010] Obtaining a second dielectric loss result of the transformer insulating oil according to the polar material parameter;
[0011] If the second dielectric loss result is abnormal, the transformer insulating oil is processed according to the polar material parameter to repair the dielectric loss abnormality of the transformer insulating oil.
[0012] In one embodiment, if the first dielectric loss result is normal, the step of obtaining the polar material parameter of the transformer insulating oil includes:
[0013] If the first dielectric loss result is normal, providing a first comparison oil sample;
[0014] Acquiring target hydrocarbon information of the first comparison oil sample and target hydrocarbon information of the transformer insulating oil;
[0015] According to the target hydrocarbon information of the first comparison oil sample and the target hydrocarbon information of the transformer insulating oil, the polar substance parameters of the transformer insulating oil are obtained.
[0016] In one embodiment, the step of obtaining a second dielectric loss result of the transformer insulating oil according to the polar material parameter comprises:
[0017] Determining whether there is a difference between the target hydrocarbon information of the first comparison oil sample and the target hydrocarbon information of the transformer insulating oil according to the polar substance parameter;
[0018] If so, the second dielectric loss result is abnormal.
[0019] In one embodiment, if the first dielectric loss result is normal, the step of obtaining the polar material parameter of the transformer insulating oil includes:
[0020] If the first dielectric loss result is normal, provide a second comparison oil sample;
[0021] Obtaining the polarity change parameter of the second comparison oil sample and the polarity change parameter of the transformer insulating oil within a first preset frequency range;
[0022] The polarity change parameters of the second comparison oil sample and the polarity change parameters of the transformer insulating oil are compared within a second preset frequency range to obtain the polar material parameters of the transformer insulating oil; wherein the first preset frequency range is greater than or equal to the second preset frequency range.
[0023] In one embodiment, the step of obtaining a second dielectric loss result of the transformer insulating oil according to the polar material parameter comprises:
[0024] According to the polar material parameter, determining whether the transformer oil has space charge polarization;
[0025] If so, the second dielectric loss result is abnormal.
[0026] In one embodiment, if the second dielectric loss result is abnormal, the step of treating the transformer insulating oil according to the polar material parameter to repair the dielectric loss abnormality of the transformer insulating oil includes:
[0027] If the second dielectric loss result is abnormal, the transformer insulating oil is subjected to acid treatment and adsorbent treatment according to the polar substance parameter to repair the dielectric loss abnormality of the transformer insulating oil.
[0028] In one embodiment, the step of obtaining the physical and chemical parameters of the transformer insulating oil includes:
[0029] The micro-water content, solid particle content and microbial content of the transformer insulating oil are obtained to form first physical and chemical performance data; and the metal ion impurity content, sol impurity content and insulating oil aging of the transformer insulating oil are obtained to form second physical and chemical performance data; wherein the physical and chemical parameters include the first physical and chemical performance data and the second physical and chemical performance data.
[0030] In one embodiment, after the step of obtaining the first dielectric loss result of the transformer insulating oil according to the physical and chemical parameters, the method for handling abnormal dielectric loss of the transformer insulating oil further includes:
[0031] If the first dielectric loss result is abnormal, the transformer insulating oil is filtered according to the first physical and chemical property data to repair the dielectric loss abnormality of the transformer insulating oil.
[0032] In one embodiment, after the step of obtaining the first dielectric loss result of the transformer insulating oil according to the physical and chemical parameters, the method for handling abnormal dielectric loss of the transformer insulating oil further includes:
[0033] If the first dielectric loss result is abnormal, the transformer insulating oil is subjected to acid treatment and adsorbent treatment according to the second physical and chemical property data to repair the dielectric loss abnormality of the transformer insulating oil.
[0034] In one embodiment, the step of obtaining the physical and chemical parameters of the transformer insulating oil includes:
[0035] The dielectric loss value and the dielectric loss value growth rate of the transformer insulating oil are obtained; wherein the physical and chemical parameters of the transformer insulating oil include the dielectric loss value and the dielectric loss value growth rate.
[0036] In addition, to achieve the above-mentioned purpose, the present application also proposes a device for handling abnormal dielectric loss of transformer insulating oil, the device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, the computer program being configured to implement the steps of the method for handling abnormal dielectric loss of transformer insulating oil as described above.
[0037] The technical solution of the present invention obtains the physical and chemical parameters of the transformer insulating oil to obtain the first dielectric loss result to preliminarily judge the use of the transformer insulating oil. When the first dielectric loss result is normal, the polar material parameters are obtained to further refine the analysis to obtain the second dielectric loss result. When the second dielectric loss result is abnormal, the transformer insulating oil is treated in a targeted manner to repair the dielectric loss abnormality. The present invention can not only quickly detect the dielectric loss abnormality of the transformer insulating oil, but also accurately identify the cause of the dielectric loss abnormality and carry out targeted treatment, which significantly improves the maintenance and management level of the transformer insulating oil and ensures the stable operation of the transformer. BRIEF DESCRIPTION OF THE DRAWINGS
[0038] 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 the structures shown in these drawings without paying creative work.
[0039] Figure 1 A schematic flow chart of an embodiment of a method for processing abnormal dielectric loss of transformer insulating oil provided by the present invention;
[0040] Figure 2 for Figure 1 A detailed flow chart of step S30 in an embodiment;
[0041] Figure 3 for Figure 1 A detailed flow chart of another embodiment of step S30;
[0042] Figure 4 A full two-dimensional mass spectrum of the transformer insulating oil and the second comparison oil sample involved in the present invention;
[0043] Figure 5 The present invention is a schematic structural diagram of an embodiment of a device for processing abnormal dielectric loss of transformer insulating oil provided by the present invention.
[0044] Description of Figure Numbers:
[0045] 1001, processing device; 1002, ROM; 1003, storage device; 1004, RAM; 1005, bus; 1006, I / O interface; 1007, input device; 1008, output device; 1009, communication device.
[0046] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments 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.
[0048] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.
[0049] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.
[0050] The reasons for abnormal dielectric loss value of transformer insulating oil are complex and varied. Existing testing standards and technical means are difficult to quickly and accurately locate the specific cause of the fault. In addition, when the dielectric loss value is abnormal, rash treatment such as vacuum oil filtration may not only fail to solve the problem, but may also break the relative balance of pollutants inside the transformer, making the dielectric loss value higher. Therefore, how to quickly and accurately identify the reasons for abnormal dielectric loss value of transformer insulating oil has become an urgent problem to be solved.
[0051] In order to solve the technical problem, the present invention proposes a method for processing abnormal dielectric loss of transformer insulating oil.
[0052] See also Figure 1 In an embodiment of the present invention, the method for processing abnormal dielectric loss of transformer insulating oil comprises the following steps:
[0053] Step S10, obtaining the physical and chemical parameters of the transformer insulating oil;
[0054] Step S20, obtaining a first dielectric loss result of the transformer insulating oil according to the physical and chemical parameters;
[0055] Step S30: if the first dielectric loss result is normal, obtaining polar material parameters of the transformer insulating oil;
[0056] Step S40, obtaining a second dielectric loss result of the transformer insulating oil according to the polar material parameter;
[0057] Step S50: If the second dielectric loss result is abnormal, the transformer insulating oil is processed according to the polar material parameter to repair the dielectric loss abnormality of the transformer insulating oil.
[0058] Specifically, step S10 obtains the basic physical and chemical parameters of the transformer insulating oil by sampling and detection means, and provides basic data for subsequent dielectric loss detection and analysis. Step S20 directly obtains the preliminary first dielectric loss result through physical and chemical parameters, which can quickly and preliminarily judge the insulation condition of the transformer insulating oil. In step S30, when the first dielectric loss result is normal, further detect the polar substance parameters (such as the content of acid and alcohol compounds) in the transformer insulating oil. The polar substance parameters can provide additional information for more finely judging whether there are potential problems with the transformer insulating oil. Step S40 can more accurately reflect the real state of the transformer insulating oil in use through fine analysis of the polar substance parameters. In step S50, when the second dielectric loss result is abnormal, according to the polar substance parameters, select a suitable treatment method to treat the insulating oil, such as using an adsorbent method or a sulfuric acid-white clay method to remove polar impurities. By carrying out targeted treatment on the transformer insulating oil, the dielectric loss abnormality can be effectively repaired, and the performance of the transformer insulating oil and the operating reliability of the transformer can be improved.
[0059] More specifically, in step S10, data information such as water content, breakdown voltage, acid value, appearance, interfacial tension, conductivity, volume resistivity, etc. of the transformer insulating oil, i.e., the faulty insulating oil, is obtained to obtain the physical and chemical parameters.
[0060] In step S20, the physical and chemical parameters are analyzed and sorted to obtain the differences in the physical and chemical properties of the transformer insulating oil, analyze the changing trends of the physical and chemical properties of the faulty insulating oil, compare the attention values of the physical and chemical properties of the faulty insulating oil, and comprehensively analyze the physical and chemical properties of the faulty insulating oil and preliminarily determine the cause of the fault.
[0061] In step S30, the possibility of increased dielectric loss caused by trace water is eliminated; the possibility of increased dielectric loss caused by solid particles and metal ion impurities is eliminated; the possibility of increased dielectric loss caused by mixed oil and polar impurities is eliminated; the possibility of increased dielectric loss caused by aging of insulation and insulating oil is eliminated; the possibility of increased dielectric loss caused by microorganisms and sol impurities is eliminated by using one or a combination of test methods such as particle size test, XRD, infrared, Raman, ICP-MS, etc.
[0062] In step S40, an in-depth investigation is performed using one or a combination of two methods selected from gas chromatography-mass spectrometry, comprehensive two-dimensional gas chromatography-mass spectrometry, and broadband dielectric impedance spectrometer to detect the polarization characteristics of the transformer insulating oil and analyze the mechanism of abnormal dielectric loss of the transformer insulating oil.
[0063] In step S50, the transformer insulating oil is vacuum filtered for dielectric loss and abnormal physical and chemical properties caused by moisture; the solid particles are removed by filtration for dielectric loss abnormalities caused by solid particles and microorganisms; the dielectric loss abnormalities caused by mixed oil, polar impurity pollution, aging, metal ion impurities, and sol impurities are treated by adsorbent method and sulfuric acid-white clay method; according to the actual situation, the transformer oil is replaced with new one taking into account the time and cost costs.
[0064] In the technical solution provided by the present invention, the first dielectric loss result is obtained by obtaining the physical and chemical parameters of the transformer insulating oil to preliminarily judge the use of the transformer insulating oil. When the first dielectric loss result is normal, the second dielectric loss result is obtained by obtaining the polar material parameters and further refining the analysis. When the second dielectric loss result is abnormal, the transformer insulating oil is processed in a targeted manner to repair the dielectric loss abnormality. The present invention can not only quickly detect the dielectric loss abnormality of the transformer insulating oil, but also accurately identify the cause of the dielectric loss abnormality and carry out targeted processing, which significantly improves the maintenance and management level of the transformer insulating oil and ensures the stable operation of the transformer.
[0065] For some aged insulating oils or insulating oils with mixed oils, it is difficult to accurately identify the polar small molecules produced or mixed due to decomposition by conventional screening methods. Therefore, this embodiment introduces the methods of gas chromatography-mass spectrometry, full two-dimensional gas chromatography-mass spectrometry, and broadband dielectric impedance spectrometer to qualitatively and quantitatively analyze the composition of insulating oil groups, the types and contents of polar substances in the oil, and their polarization behaviors. Please continue to refer to Figure 1 , and see Figure 2 As an optional implementation of this embodiment, if the first dielectric loss result is normal, the step of obtaining the polar material parameters of the transformer insulating oil includes:
[0066] Step S301: If the first dielectric loss result is normal, provide a first comparison oil sample;
[0067] Step S302, obtaining target hydrocarbon information of the first comparison oil sample and target hydrocarbon information of the transformer insulating oil;
[0068] Step S303: acquiring polar material parameters of the transformer insulating oil according to the target hydrocarbon information of the first comparison oil sample and the target hydrocarbon information of the transformer insulating oil.
[0069] It should be noted that the first comparison oil sample is an unused oil sample that is the same as the transformer insulating oil.
[0070] Specifically, in step S301 to step S303, the oil group composition of the transformer insulating oil and the oil group composition of the first comparative oil sample are analyzed by using a gas chromatography-mass spectrometer and a comprehensive two-dimensional gas chromatography-mass spectrometer in the prior art, and then the content of paraffin, cycloalkane and aromatic hydrocarbons in the transformer insulating oil and the first comparative oil sample are analyzed to form the target hydrocarbon information. The polar substance parameter is formed by the paraffin content, cycloalkane content and aromatic hydrocarbon content in the transformer insulating oil and the first comparative oil sample.
[0071] More specifically, in step S301, a reference oil sample, namely the first comparative oil sample, is provided so as to perform comparative analysis in subsequent steps to ensure the accuracy of the analysis results. In step S302, the oil group composition of the first comparative oil sample and the transformer insulating oil, including the content of paraffins, cycloalkanes and aromatics, is analyzed by gas chromatography-mass spectrometry and full two-dimensional gas chromatography-mass spectrometry to form the target hydrocarbon information. By comparative analysis, detailed hydrocarbon information of the two oil samples is obtained to provide data support for the subsequent judgment of the polar substances. In step S303, according to the target hydrocarbon information obtained in step S302, the polar substances present in the transformer insulating oil and their influence on the dielectric loss value are identified to provide a more accurate basis for fault judgment. This embodiment can not only accurately identify the polar small molecule substances and their polarization behavior in the transformer insulating oil, but also accurately judge the abnormal cause of the dielectric loss of the transformer insulating oil through comparative analysis.
[0072] In an embodiment of the present invention, the step of obtaining a second dielectric loss result of the transformer insulating oil according to the polar material parameter comprises:
[0073] Step S401: judging whether there is a difference between the target hydrocarbon information of the first comparison oil sample and the target hydrocarbon information of the transformer insulating oil according to the polar substance parameter;
[0074] Step S402: If yes, the second dielectric loss result is abnormal.
[0075] Specifically, through step S401 to step S402, the polar substances contained in the transformer insulating oil are qualitatively and quantitatively analyzed according to the polar substance parameters including the alkane content, the cycloalkane content and the aromatic hydrocarbon content, thereby confirming whether there is any polar substance mixed in the transformer insulating oil.
[0076] More specifically, in step S401, the oil group composition of the transformer insulating oil and the first comparison oil sample is analyzed by gas chromatography-mass spectrometry and comprehensive two-dimensional gas chromatography-mass spectrometry to obtain the target hydrocarbon information (including the content of paraffin, the content of cycloalkane and the content of aromatic hydrocarbons) of the two. The two sets of data are compared to determine whether there is a significant difference. By comparing and analyzing the two sets of oil group composition data, it is possible to qualitatively determine whether foreign polar substances are mixed into the transformer insulating oil, thereby preliminarily determining the cause of the abnormal dielectric loss. In step S402, if the analysis result in step S401 shows that there is a difference between the target hydrocarbon information of the first comparison oil sample and the target hydrocarbon information of the transformer insulating oil, it is determined that the second dielectric loss result of the transformer insulating oil is abnormal. By determining the difference in oil samples, the mixing of polar substances in the transformer insulating oil can be accurately identified, thereby confirming the existence of abnormal dielectric loss, and further formulating targeted treatment measures. This embodiment can quickly detect the abnormal dielectric loss of the transformer insulating oil and accurately identify the cause of the abnormal dielectric loss through detailed polar substance analysis and comparison. This method not only solves the problem that traditional methods are difficult to accurately identify, but also improves the management and maintenance efficiency of transformer insulating oil, ensuring long-term and stable operation of the transformer.
[0077] As another optional implementation of this embodiment, please continue to refer to Figure 1 , and see Figure 3 There are many steps for implementing the step of obtaining the polar material parameters of the transformer insulating oil if the first dielectric loss result is normal. In an embodiment of the present invention, the step of obtaining the polar material parameters of the transformer insulating oil if the first dielectric loss result is normal includes:
[0078] Step S310: If the first dielectric loss result is normal, provide a second comparison oil sample;
[0079] Step S320, obtaining the polarity change parameter of the second comparison oil sample and the polarity change parameter of the transformer insulating oil within a first preset frequency range;
[0080] Step S330, comparing the polarity change parameters of the second comparison oil sample and the polarity change parameters of the transformer insulating oil within a second preset frequency range to obtain the polar material parameters of the transformer insulating oil; wherein the first preset frequency range is greater than or equal to the second preset frequency range.
[0081] It should be noted that the first preset frequency range is 10 -2 Hz to 10 7 Hz; the second preset frequency range is 10 -2 Hz to 10 2 The second comparative oil sample is an unused oil sample that is the same as the transformer insulating oil.
[0082] Specifically, in step S320 to step S330, the polarization behavior of the transformer insulating oil and its small molecular substances is checked by using a broadband dielectric impedance spectrometer in the prior art: the second comparison oil sample and the transformer insulating oil are tested at 10 -2 Hz to 10 7 Hz frequency range relative dielectric constant and dielectric loss factor with frequency change spectrum. Compare the two in the low frequency band (less than 10 2 Hz) to confirm whether there is any polar substance mixed in.
[0083] More specifically, in step S310, when it is detected that the first dielectric loss result of the transformer insulating oil is normal, an unused oil sample identical to the transformer insulating oil is provided as a second comparison oil sample to provide a reference benchmark for subsequent polarity change parameter comparison analysis to ensure the accuracy of the analysis result. In step S320, a broadband dielectric impedance spectrometer is used to test the second comparison oil sample and the transformer insulating oil at 10 -2 Hz to 10 7 The relative dielectric constant and dielectric loss factor in the first preset frequency range of 10 Hz are obtained as a function of frequency, and the polarity change parameters of the oil sample are obtained comprehensively in a wide frequency range, laying a data foundation for the subsequent analysis of the mixing of polar substances. -2 Hz to 10 2 Within the second preset frequency range of Hz, the polarity change parameters of the second comparison oil sample and the transformer insulating oil are compared and analyzed to confirm the change trend of the two in the low frequency band, identify whether there is polar substance mixing, and obtain the polar substance parameters of the transformer insulating oil. By comparing the change trend in the low frequency band, it is possible to more sensitively detect the mixing of polar substances that may exist in the transformer insulating oil, thereby accurately identifying the cause of abnormal dielectric loss. This embodiment can not only comprehensively obtain the polarity change parameters of the transformer insulating oil and its comparison oil samples, but also accurately determine the cause of abnormal dielectric loss of the transformer insulating oil through comparative analysis. It solves the problem that conventional troubleshooting methods are difficult to accurately identify, improves the maintenance and management level of transformer insulating oil, and ensures the stable operation of the transformer.
[0084] In an embodiment of the present invention, the step of obtaining a second dielectric loss result of the transformer insulating oil according to the polar material parameter comprises:
[0085] Step S410: judging whether the transformer oil has space charge polarization according to the polar material parameter;
[0086] Step S420: If yes, the second dielectric loss result is abnormal.
[0087] Specifically, the transformer oil and the second comparison oil sample are compared in the low frequency band (less than 10 2 Hz) to determine whether there are extra dipoles and space charge polarization in the abnormal oil sample, and then confirm whether there is any polar substance mixed in.
[0088] More specifically, in step S410, through the analysis of the changing trend of the low frequency band, the spatial charge polarization phenomenon in the transformer insulating oil can be keenly detected, so as to preliminarily judge whether there is polar substance mixed in the transformer insulating oil. In step S420, if the analysis result in step S410 shows that there is spatial charge polarization phenomenon in the transformer insulating oil, it is determined that the second dielectric loss result of the transformer insulating oil is abnormal. By identifying the spatial charge polarization phenomenon, it is possible to accurately judge whether foreign polar substances are mixed in the transformer insulating oil, thereby confirming the existence of dielectric loss abnormality and guiding subsequent treatment measures. This embodiment can quickly detect the dielectric loss abnormality of the transformer insulating oil and accurately identify the cause of the dielectric loss abnormality through detailed analysis of polar substance parameters and comparison of the changing trend of the low frequency band.
[0089] In an embodiment of the present invention, if the second dielectric loss result is abnormal, the step of processing the transformer insulating oil according to the polar material parameter to repair the dielectric loss abnormality of the transformer insulating oil includes:
[0090] Step S510: If the second dielectric loss result is abnormal, the transformer insulating oil is subjected to acid treatment and adsorbent treatment according to the polar substance parameter to repair the dielectric loss abnormality of the transformer insulating oil.
[0091] Specifically, in step S510, when it is detected that the second dielectric loss result is abnormal, the transformer insulating oil is subjected to acid treatment and adsorbent treatment according to the polar substance parameters obtained previously. Acid treatment is used to remove acidic substances and polar small molecules in the oil, and adsorbent treatment is used to capture and remove residual polar impurities. The combination of acid treatment and adsorbent treatment not only effectively removes acidic substances and polar small molecules in the transformer insulating oil, but also further captures and removes residual polar impurities, repairs the dielectric loss abnormality of the transformer insulating oil, and restores its insulation performance. This embodiment can quickly repair the dielectric loss abnormality of the transformer insulating oil and restore its insulation performance through acid treatment and adsorbent treatment. This method not only solves the shortcomings of traditional methods in repairing the dielectric loss abnormality of transformer insulating oil, but also improves the management and maintenance efficiency of transformer insulating oil, ensuring long-term stable operation of the transformer.
[0092] In an embodiment of the present invention, the step of obtaining the physical and chemical parameters of the transformer insulating oil comprises:
[0093] Step S110, obtaining the micro-water content, solid particle content and microbial content of the transformer insulating oil to form first physical and chemical performance data; and obtaining the metal ion impurity content, sol impurity content and insulating oil aging of the transformer insulating oil to form second physical and chemical performance data; wherein the physical and chemical parameters include the first physical and chemical performance data and the second physical and chemical performance data.
[0094] Specifically, the first physical and chemical performance data is obtained:
[0095] The dielectric loss of the transformer insulating oil increases with the increase of the micro-water content. When the water content exceeds the saturated water content of the insulating oil, the dielectric loss value rises linearly. Therefore, for the transformer insulating oil with abnormal dielectric loss, the micro-water content is first tested. If the water content is abnormal, consider removing the water by filtering the oil first and then re-testing the value of the oil dielectric loss.
[0096] The number of solid particles with a size greater than 5 μm in the transformer insulating oil is counted. If an abnormal particle size is detected, auxiliary tests such as XRD, infrared, and Raman can be performed on the filtered impurities to determine the type of impurity particles.
[0097] During the manufacturing, installation and overhaul of transformers, mosquitoes, flies and bacteria may infiltrate clean insulating oil, and when the temperature is appropriate (50°C to 70°C) and impurities and water are mixed into the oil, microorganisms are likely to multiply in large numbers, causing a sharp increase in dielectric loss of the insulating oil. By counting the microbial colonies in the transformer insulating oil, the content of microorganisms in the transformer insulating oil can be quantitatively checked.
[0098] Obtain the second physical and chemical performance data:
[0099] Qualitative and quantitative determination of five metal elements including but not limited to copper, iron, zinc, manganese and aluminum is carried out to obtain the content of metal ion impurities, so as to comprehensively check the oil contamination.
[0100] The sol impurities in the transformer insulating oil are usually produced by the mutual dissolution of impurities such as dust entering during the manufacturing and installation process of the transformer with the insulating oil or other transformer process materials, and diffuse in the insulating oil, causing its dielectric loss to increase and the breakdown strength to decrease. The diameter of the sol impurities is between 1-100nm, and it cannot be removed by factory filtration. Measuring the sol impurity content of the transformer insulating oil can reflect that the dielectric loss value of the transformer insulating oil is abnormal.
[0101] The aging of insulating oil is usually accompanied by yellowing of color, decrease in interfacial tension, increase in acid value, decrease in volume resistivity, decrease in breakdown voltage, increase in sludge, etc. Therefore, the degree of aging of the insulating oil is judged based on the actual operating time and operating conditions of the transformer and the test methods in the prior art.
[0102] In an embodiment of the present invention, after the step of obtaining the first dielectric loss result of the transformer insulating oil according to the physical and chemical parameters, the method for handling abnormal dielectric loss of the transformer insulating oil further includes:
[0103] Step S111: If the first dielectric loss result is abnormal, the transformer insulating oil is filtered according to the first physical and chemical property data to repair the dielectric loss abnormality of the transformer insulating oil.
[0104] Specifically, if the transformer insulating oil is affected by moisture, resulting in abnormal dielectric loss and various physical and chemical properties of the transformer, the transformer insulating oil can be subjected to vacuum oil filtration treatment; if the transformer insulating oil is affected by solid particles and microorganisms, the solid particles can usually be removed by filtration, but when the solid particles are small, it is necessary to replace the filter element with a smaller pore size for filtration treatment.
[0105] In an embodiment of the present invention, after the step of obtaining the first dielectric loss result of the transformer insulating oil according to the physical and chemical parameters, the method for handling abnormal dielectric loss of the transformer insulating oil further includes:
[0106] Step S112: If the first dielectric loss result is abnormal, the transformer insulating oil is subjected to acid treatment and adsorbent treatment according to the second physical and chemical property data to repair the dielectric loss abnormality of the transformer insulating oil.
[0107] Specifically, the transformer insulating oil can be treated by the adsorbent method and the sulfuric acid-clay method for dielectric loss abnormalities caused by oil mixing, polar impurity pollution, aging, metal ion impurities, and sol impurities. Usually, the adsorbent method is used to treat oil with a lower degree of deterioration, while the sulfuric acid-clay method is used to treat oil with a more serious degree of deterioration. In addition, the transformer oil can be replaced with a new one based on the actual situation, taking into account the time and cost costs.
[0108] In an embodiment of the present invention, the step of obtaining the physical and chemical parameters of the transformer insulating oil comprises:
[0109] Step S101, obtaining the dielectric loss value and dielectric loss value growth rate of the transformer insulating oil; wherein the physical and chemical parameters of the transformer insulating oil include the dielectric loss value and the dielectric loss value growth rate.
[0110] Specifically, in order to provide an implementation method for determining whether it is necessary to perform dielectric loss abnormality judgment on the transformer insulating oil, the dielectric loss value and the dielectric loss value growth rate of the transformer insulating oil are obtained by online monitoring equipment or by manual sampling and measurement in the laboratory to provide basic status data of the transformer insulating oil, thereby providing a basic reference for determining whether the transformer insulating oil has dielectric loss abnormality.
[0111] More specifically, when the dielectric loss value of the transformer insulating oil exceeds the limit value in the preset standard, the transformer insulating oil needs to be subjected to dielectric loss abnormality treatment using the dielectric loss abnormality treatment method of the transformer insulating oil described herein.
[0112] When the dielectric loss value of the transformer insulating oil does not exceed the limit value in the preset standard, but the dielectric loss growth rate of the transformer insulating oil is fast, or there is a large increase compared with the crude oil and the initial stage of transformer commissioning, it is necessary to perform dielectric loss abnormality processing on the transformer insulating oil using the dielectric loss abnormality processing method of the transformer insulating oil described herein.
[0113] It should be noted that the preset standard is the existing technology.
[0114] In an embodiment of the present invention, after step S50, the second dielectric loss result is verified.
[0115] Specifically, the verification in this embodiment refers to experimental simulation verification and mechanism analysis of the cause of abnormal dielectric loss.
[0116] As an optional implementation of this embodiment, by testing the physical and chemical properties of the transformer insulating oil, various test characterization methods are assisted, and by determining whether the oil sample returns to normal after fault processing, the cause of the abnormal dielectric loss of the transformer insulating oil is comprehensively analyzed.
[0117] As another optional implementation manner of this embodiment, the oil group composition structure components and polar substances of the transformer insulating oil are tested by gas chromatography-mass spectrometry and comprehensive two-dimensional gas chromatography-mass spectrometry; the thermal stability of the transformer insulating oil is tested by thermogravimetric analyzer, differential scanning calorimeter and thermal aging gas production; the polarization characteristics of the transformer insulating oil are detected by broadband dielectric impedance spectrometer, and the mechanism of abnormal dielectric loss of the transformer insulating oil is analyzed.
[0118] As another optional implementation of this embodiment, the cause of the failure is further verified through simulation experimental tests in materials science and mechanism analysis.
[0119] For ease of understanding, a specific implementation is shown here:
[0120] Physical and chemical data collection and analysis: The electrical performance of an unused Kelian transformer insulating oil deteriorates, which is manifested by increased dielectric loss and reduced breakdown voltage, and does not meet the requirements of GB 2536-2011 "Unused mineral insulating oil for electrical fluid transformers and switches". The water content, breakdown voltage, acid value, appearance and other information of the faulty insulating oil sample, i.e. the transformer insulating oil, and the new oil, i.e. the first comparison oil sample, are tested, and the above data information is sorted and summarized.
[0121] Comparing the physical and chemical properties of the faulty insulating oil and the new oil, it was found that the faulty insulating oil had a clear and transparent appearance, normal micro-water content, normal acid value, increased dielectric loss, reduced breakdown voltage, reduced interfacial tension, increased conductivity, and reduced volume resistivity. Combining the actual situation with the physical and chemical performance parameters, it can be preliminarily inferred that the faulty insulating oil was caused by one or more of the following reasons: solid particle impurities, metal ion impurities, mixed oil, and polar impurity contamination, resulting in abnormal dielectric loss.
[0122] Troubleshooting of routine fault causes: Check for solid particle impurities and test the faulty insulating oil in the particle size range of 0.5-400μm, focusing on the particle size distribution of 0.5-5μm. From the test results, it can be seen that there are 176 insoluble particles in the faulty oil with a particle size greater than 5μm, which meets the standard, but there are 34958 particles less than 5μm, with a high degree of contamination, which seriously affects the electrical performance of the insulating oil.
[0123] Table 1 Transformer insulating oil particle size test:
[0124] Diameter range (μm) Quantity / 100mL Average particle size (μm) 1 0.5-2 34482 0.793 2 2-5 476 3.112 3 5-10 142 6.348 4 10-20 30 12.239 5 20-50 4 28.314 6 50-400 0 0
[0125] Solid particles and metal ion impurities were checked, and ICP-MS tests were performed on the faulty insulating oil. In order to comprehensively check the oil contamination, qualitative and quantitative tests were performed on the full spectrum of metal elements. It was found that there were no metal elements in the faulty insulating oil. It can be judged that the oil does not contain metal ion impurities, and the solid particles are non-metallic particle impurities. Further qualitative analysis of the solid particles in the insulating oil was performed, and through Raman, XRD, optical microscopy and other testing methods, it was proved that the solid particles were carbon particles.
[0126] Check for sol impurities. The acid value of the faulty insulating oil is normal, and the color has not changed significantly. The possibility of dielectric loss increase due to sol impurities is small.
[0127] Check for microorganisms. The faulty insulating oil is unused oil, so the possibility of dielectric loss growth caused by microorganisms is small. Use a microscope to observe whether there are bacteria in the oil. If bacteria are found, perform a microbial colony count test on the oil sample.
[0128] After troubleshooting the above fault causes, it was preliminarily determined that the insulating oil failure was caused by carbon particle impurities.
[0129] In-depth investigation of the cause of the fault: Through dielectric loss, breakdown, resistivity and other testing methods, and verification of actual working conditions, it is found that conventional methods can only indicate the possibility of oil mixing and polar impurities, but cannot be conclusive. Through steps S30 to S50, the group composition and full two-dimensional group composition spectrum of the transformer insulating oil and the second comparison oil sample are tested using a gas chromatograph-gas spectrometer and a full two-dimensional gas chromatograph-gas spectrometer to judge the dielectric loss fault of the transformer insulating oil. It is found that the oil group composition of the transformer insulating oil has changed slightly, and the polarization characteristics of the transformer insulating oil are detected by a broadband dielectric impedance spectrometer, and the possibility of oil mixing in this faulty oil sample is comprehensively judged.
[0130] Fault handling: Vacuum filtration treatment: After vacuum treatment of the faulty insulating oil, relevant physical and chemical performance tests are carried out. The breakdown performance of the insulating oil is greatly improved, but the dielectric loss is not improved and still does not meet the requirements of the standard.
[0131] Adsorbent treatment: The oil sample treated by vacuum filtration is treated again by adsorption method. After the treatment, relevant physical and chemical performance tests are carried out. The dielectric loss of the insulating oil is greatly improved and meets the requirements of the standard.
[0132] Based on the comprehensive fault cause investigation and fault handling results, it was analyzed and determined that the insulating oil failure was caused by both carbon particle impurities and insulating oil mixing.
[0133] Verification of the cause of the failure: A certain amount of carbon powder and diesel engine oil were added to the qualified transformer insulating oil. Tests found that the breakdown voltage and dielectric loss were abnormal, while other physical and chemical properties did not change much.
[0134] Table 2 Performance of transformer insulating oil after filtration treatment
[0135] Mixed oil content (mg / kg) 0 5 10 20 50 100 Dielectric loss (90℃,%) 0.01 0.81 1.09 3.78 6.93 9.15 Breakdown voltage(kV) 71 69.7 71.9 70.5 72.7 73.2
[0136] The transformer insulating oil was filtered, and its breakdown voltage was significantly improved, but the dielectric loss value was not significantly improved, as shown in Table 2; the insulating oil group composition test was then performed, and it was found that the group composition was slightly changed.
[0137] Table 3 Properties of transformer insulating oil after adsorption treatment
[0138]
[0139] The transformer was further treated with an adsorbent method, and after the treatment, relevant physical and chemical performance tests were performed. The dielectric loss of the insulating oil was greatly improved, as shown in Table 3, which met the requirements of the above standards.
[0140] See also Figure 4 For ease of understanding, another specific implementation is shown here:
[0141] Physical and chemical data collection: The unused transformer insulating oil of Kelian was treated in the factory and qualified. It was then sealed and stored. After 4 years, it was found that the electrical performance of the insulating oil was seriously deteriorated, which was manifested as increased dielectric loss and reduced breakdown voltage, which did not meet the required values in the standard. The water content, breakdown voltage, acid value, appearance and other information of the faulty insulating oil and the new oil were tested, and the above data information was sorted and summarized.
[0142] Comparing the physical and chemical properties of the faulty insulating oil and the new oil, it was found that although the insulating oil looked clear and transparent, its micro-water content increased, the acid value increased, the dielectric loss increased, the breakdown voltage decreased, the interfacial tension decreased, the conductivity increased, and the volume resistivity decreased. Combining the actual situation and the physical and chemical performance parameters for analysis, it can be preliminarily inferred that the faulty insulating oil was caused by abnormal dielectric loss due to aging.
[0143] Troubleshooting of conventional fault causes: Check for solid particles and metal ion impurities. The faulty insulating oil is in a sealed state for a long time, and is less likely to be contaminated by solid particles and metal ion impurities. The faulty insulating oil was tested in the particle size range of 1-100μm, and the particle size distribution of 1-10μm was focused on. It was found that there was no excessive amount of solid particles in the oil. At the same time, ICP-MS was used to test the metal ion and metal particle content in the faulty insulating oil, i.e. the transformer insulating oil, and it was found that the content of various metal ions was extremely low, thus ruling out the possibility of solid particles and metal ion impurities mixed in the oil.
[0144] Check for sol impurities. The faulty insulating oil is in a sealed state for a long time, and the possibility of dielectric loss increase due to sol impurities is small.
[0145] Check for microorganisms. The faulty insulating oil has been in a sealed state for a long time, and no bacteria are found in the oil under a microscope, which proves that the possibility of dielectric loss growth caused by microorganisms is small.
[0146] In-depth investigation of the cause of the fault: The above conventional test methods did not find the cause of the abnormal dielectric loss of the faulty oil sample. Therefore, a comprehensive two-dimensional gas chromatography-mass spectrometer was used to conduct qualitative and quantitative analysis of the polar substances in the insulating oil. The results are as follows: Figure 4 Comparing the crude oil and the fault oil, it can be seen that the insulating oil produced a large amount of polar compounds after being stored for 4 years, and other components did not change much.
[0147] It should be noted that Figure 4 (A) is the full two-dimensional mass spectrum of the second comparative oil sample, Figure 4 (B) is a full two-dimensional mass spectrum of the transformer insulating oil; Figure 4 The dotted frame in (B) is a mark indicating the polar substance, that is, the dotted frame contains the polar substance.
[0148] Verification of the cause of the fault: Check the information on the on-site processing and storage of the transformer insulating oil, and eliminate external contamination of the insulating oil such as mixed oil, polar impurities, and particulate matter. Combined with the characterization test results and the changes in the performance parameters of the insulating oil after adsorption treatment, it can be determined that the cause of the insulating oil dielectric loss failure is aging caused by long-term storage.
[0149] Fault handling: After the above fault causes were checked, it was initially determined that the cause of the insulation oil failure was aging. The faulty insulation oil was treated with the adsorbent method, and then the relevant physical and chemical performance tests were carried out. The dielectric loss, withstand voltage, acid value and other properties of the insulation oil were greatly improved and met the requirements of the standard.
[0150] The present invention provides a complete set of judgment and processing methods for the abnormal dielectric loss faults of the transformer insulating oil by collecting physical and chemical data, troubleshooting, troubleshooting, and verifying the fault causes of the transformer insulating oil. For the fault causes that cannot be accurately identified by conventional methods, the methods of gas chromatography-mass spectrometry, full two-dimensional gas chromatography-mass spectrometry, and wide-band dielectric impedance spectrometer are introduced for in-depth investigation. The method has clear logic, accurate judgment, and comprehensive coverage. It can quickly identify the causes of abnormal dielectric loss faults, thereby carrying out targeted fault handling, and is highly innovative. It helps relevant personnel in the manufacturing and operation and maintenance of transformers to quickly, accurately, and targetedly handle abnormal dielectric loss faults, and has broad prospects for promotion and application, with good social and economic benefits.
[0151] The present invention also provides a device for processing abnormal dielectric loss of transformer insulating oil, the device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, the computer program being configured to implement the steps of the method for processing abnormal dielectric loss of transformer insulating oil as described above.
[0152] In the embodiments of the present invention, please refer to Figure 5 , which shows a schematic diagram of the structure of a transformer insulating oil dielectric loss anomaly processing device suitable for implementing the embodiment of the present application. The transformer insulating oil dielectric loss anomaly processing device in the embodiment of the present application may include but is not limited to mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. Figure 5The transformer insulating oil dielectric loss abnormality processing device shown is only an example and should not bring any limitation to the function and scope of use of the embodiment of the present application.
[0153] like Figure 5 As shown, the dielectric loss abnormality processing device for transformer insulating oil may include a processing device 1001 (e.g., a central processing unit, a graphics processing unit, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM: Read Only Memory) 1002 or a program loaded from a storage device 1003 to a random access memory (RAM: Random Access Memory) 1004. Various programs and data required for the operation of the dielectric loss abnormality processing device for transformer insulating oil are also stored in RAM1004. The processing device 1001, ROM1002, and RAM1004 are connected to each other via a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Typically, the following systems can be connected to the I / O interface 1006: input devices 1007 including, for example, a touch screen, a touchpad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; output devices 1008 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; storage devices 1003 including, for example, a magnetic tape, a hard disk, etc.; and communication devices 1009. The communication device 1009 can allow the dielectric loss abnormality processing device for transformer insulating oil to communicate wirelessly or wired with other devices to exchange data. Although the figure shows a dielectric loss abnormality processing device for transformer insulating oil with various systems, it should be understood that it is not required to implement or have all the systems shown. More or fewer systems may be implemented or have alternatively.
[0154] In particular, according to the embodiments disclosed in the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments disclosed in the present application include a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network through a communication device, or installed from a storage device 1003, or installed from a ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiment disclosed in the present application are executed.
[0155] The dielectric loss abnormality processing device for transformer insulating oil provided by the present application adopts the dielectric loss abnormality processing method for transformer insulating oil in the above embodiment. Compared with the prior art, the beneficial effects of the dielectric loss abnormality processing device for transformer insulating oil provided by the present application are the same as the beneficial effects of the dielectric loss abnormality processing method for transformer insulating oil provided by the above embodiment, and other technical features in the dielectric loss abnormality processing device for transformer insulating oil are the same as the features disclosed in the method of the previous embodiment, which will not be repeated here.
[0156] It should be understood that the various parts disclosed in this application can be implemented by hardware, software, firmware or a combination thereof. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.
[0157] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.
[0158] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.
Claims
1. A method for treating abnormal dielectric loss of transformer insulating oil, characterized in that: The method for processing abnormal dielectric loss of transformer insulating oil comprises: Obtaining physical and chemical parameters of the transformer insulating oil; Obtaining a first dielectric loss result of the transformer insulating oil according to the physical and chemical parameters; If the first dielectric loss result is normal, obtaining the polar material parameters of the transformer insulating oil; Obtaining a second dielectric loss result of the transformer insulating oil according to the polar material parameter; If the second dielectric loss result is abnormal, the transformer insulating oil is processed according to the polar material parameter to repair the dielectric loss abnormality of the transformer insulating oil.
2. The method for treating abnormal dielectric loss of transformer insulating oil according to claim 1, characterized in that: If the first dielectric loss result is normal, the step of obtaining the polar material parameters of the transformer insulating oil comprises: If the first dielectric loss result is normal, providing a first comparison oil sample; Acquiring target hydrocarbon information of the first comparison oil sample and target hydrocarbon information of the transformer insulating oil; According to the target hydrocarbon information of the first comparison oil sample and the target hydrocarbon information of the transformer insulating oil, the polar substance parameters of the transformer insulating oil are obtained.
3. The method for treating abnormal dielectric loss of transformer insulating oil according to claim 2, characterized in that: The step of obtaining a second dielectric loss result of the transformer insulating oil according to the polar material parameter comprises: Determining whether there is a difference between the target hydrocarbon information of the first comparison oil sample and the target hydrocarbon information of the transformer insulating oil according to the polar substance parameter; If so, the second dielectric loss result is abnormal.
4. The method for treating abnormal dielectric loss of transformer insulating oil according to claim 1, characterized in that: If the first dielectric loss result is normal, the step of obtaining the polar material parameters of the transformer insulating oil comprises: If the first dielectric loss result is normal, provide a second comparison oil sample; Obtaining the polarity change parameter of the second comparison oil sample and the polarity change parameter of the transformer insulating oil within a first preset frequency range; The polarity change parameters of the second comparison oil sample and the polarity change parameters of the transformer insulating oil are compared within a second preset frequency range to obtain the polar material parameters of the transformer insulating oil; wherein the first preset frequency range is greater than or equal to the second preset frequency range.
5. The method for treating abnormal dielectric loss of transformer insulating oil according to claim 4, characterized in that: The step of obtaining a second dielectric loss result of the transformer insulating oil according to the polar material parameter comprises: According to the polar material parameter, determining whether the transformer oil has space charge polarization; If so, the second dielectric loss result is abnormal.
6. The method for treating abnormal dielectric loss of transformer insulating oil according to any one of claims 1 to 5, characterized in that: If the second dielectric loss result is abnormal, the step of treating the transformer insulating oil according to the polar material parameter to repair the dielectric loss abnormality of the transformer insulating oil includes: If the second dielectric loss result is abnormal, the transformer insulating oil is subjected to acid treatment and adsorbent treatment according to the polar substance parameter to repair the dielectric loss abnormality of the transformer insulating oil.
7. The method for treating abnormal dielectric loss of transformer insulating oil according to any one of claims 1 to 5, characterized in that: The step of obtaining the physical and chemical parameters of the transformer insulating oil comprises: The micro-water content, solid particle content and microbial content of the transformer insulating oil are obtained to form first physical and chemical performance data; and the metal ion impurity content, sol impurity content and insulating oil aging of the transformer insulating oil are obtained to form second physical and chemical performance data; wherein the physical and chemical parameters include the first physical and chemical performance data and the second physical and chemical performance data.
8. The method for treating abnormal dielectric loss of transformer insulating oil according to claim 7, characterized in that: After the step of obtaining the first dielectric loss result of the transformer insulating oil according to the physical and chemical parameters, the method for handling abnormal dielectric loss of the transformer insulating oil further includes: If the first dielectric loss result is abnormal, the transformer insulating oil is filtered according to the first physical and chemical property data to repair the dielectric loss abnormality of the transformer insulating oil.
9. The method for treating abnormal dielectric loss of transformer insulating oil according to claim 7, characterized in that: After the step of obtaining the first dielectric loss result of the transformer insulating oil according to the physical and chemical parameters, the method for handling abnormal dielectric loss of the transformer insulating oil further includes: If the first dielectric loss result is abnormal, the transformer insulating oil is subjected to acid treatment and adsorbent treatment according to the second physical and chemical property data to repair the dielectric loss abnormality of the transformer insulating oil.
10. The method for treating abnormal dielectric loss of transformer insulating oil according to any one of claims 1 to 5, characterized in that: The step of obtaining the physical and chemical parameters of the transformer insulating oil comprises: The dielectric loss value and the dielectric loss value growth rate of the transformer insulating oil are obtained; wherein the physical and chemical parameters of the transformer insulating oil include the dielectric loss value and the dielectric loss value growth rate.
11. A device for treating abnormal dielectric loss of transformer insulating oil, characterized in that: The device for handling abnormal dielectric loss of transformer insulating oil comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the computer program is configured to implement the steps of the method for handling abnormal dielectric loss of transformer insulating oil as described in any one of claims 1 to 10.