Panoramic sensing method and system for insulation state of high-voltage equipment of transformer substation

Abstract

The invention discloses a panoramic sensing method and system for an insulation state of high-voltage equipment of a transformer substation. The method comprises the following steps: acquiring first monitoring data and first test data of target transformer substation equipment; performing degradation analysis on the first monitoring data and the first test data according to a preset degradation analysis strategy to obtain a first degradation amount and a second degradation amount; judging the first state level confidence coefficient of the target substation equipment according to the first degradation quantity and the second degradation quantity; and performing state perception according to a confidence judgment result. According to the invention, the insulation state of the substation equipment can be monitored in real time, and potential faults and risks can be found in time, so that the safety and reliability of power grid operation are improved. By adopting the panoramic perception method provided by the invention, the frequency and cost of manual inspection can be reduced, and the efficiency and accuracy of data processing can be improved at the same time.

Description

Technical Field

[0001] The present invention relates to the technical field of green intelligent electrical equipment, and in particular to a method and system for panoramic sensing of insulation status of high-voltage equipment in a substation. Background Art

[0003] The digital grid technology system is mainly composed of physical systems, information systems, and business systems. Substations are an important part of the physical system in the digital grid technology system. They are responsible for transforming voltage and current, receiving electric energy, and distributing electric energy. High-voltage equipment such as transformers, high-voltage switches, and lightning arresters in substations are basic units of the power system and are important high-voltage equipment to ensure the safe, reliable, green, and efficient operation of the power system. The insulation state of high-voltage equipment often deteriorates during the development period, and its electrical, oil, and gas characteristic quantities have signs of asymptotic degradation. The panoramic perception of the insulation state of high-voltage equipment can monitor the numerical evolution trend of electrical and oil and gas degradation characteristic quantities, warn of potential faults early, and predict the remaining life. In the past, the insulation state of electrical equipment was mainly based on single sensing, and there were disadvantages such as local, one-sided, and hysteresis in state monitoring and fault diagnosis. It is urgent to scientifically study and apply state perception data such as multi-sensor monitoring and testing and multi-parameter fusion technology of station equipment to achieve panoramic perception of insulation state. Summary of the invention

[0004] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] In view of the above existing problems, the present invention is proposed.

[0006] Therefore, the present invention provides a method and system for panoramic perception of the insulation status of high-voltage equipment in a substation, which can solve the problems mentioned in the background technology.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0008] In a first aspect, the present invention provides a method for panoramic perception of insulation status of high-voltage equipment in a substation, comprising:

[0009] Acquire first monitoring data and first test data of target substation equipment;

[0010] Performing degradation analysis on the first monitoring data and the first test data according to a preset degradation analysis strategy to obtain a first degradation amount and a second degradation amount;

[0011] Determining the confidence level of the first state level of the target substation equipment according to the first degradation amount and the second degradation amount;

[0012] The state perception is performed based on the confidence judgment results.

[0013] As a preferred solution of the panoramic perception method for the insulation status of high-voltage equipment in a substation according to the present invention, wherein: the degradation analysis is performed on the first monitoring data and the first test data according to the preset degradation analysis strategy to obtain the first degradation amount and the second degradation amount, including:

[0014] The preset degradation analysis strategy includes a first degradation analysis strategy and a second degradation analysis strategy;

[0015] The first monitoring data obtains a first degradation amount through a first degradation analysis strategy;

[0016] The first test data is used to obtain a second degradation amount through a second degradation analysis strategy.

[0017] As a preferred solution of the panoramic perception method for the insulation status of high-voltage equipment in a substation according to the present invention, the step of judging the confidence level of the first status of the target substation equipment according to the first degradation amount and the second degradation amount includes:

[0018] Setting a first warning threshold and a first attention threshold;

[0019] The target substation equipment status score is calculated according to the first degradation amount and the second degradation amount in combination with the first warning threshold and the first attention threshold.

[0020] As a preferred solution of the panoramic perception method for the insulation status of high-voltage equipment in a substation according to the present invention, the step of judging the confidence level of the first status of the target substation equipment according to the first degradation amount and the second degradation amount further includes:

[0021] According to the target substation equipment status score and in combination with a preset status level classification standard, determine the status level corresponding to the target substation equipment status score;

[0022] The preset status level classification standard includes a plurality of scoring intervals, and each scoring interval corresponds to a unique status level.

[0023] As a preferred solution of the panoramic perception method for the insulation status of high-voltage equipment in a substation according to the present invention, the step of judging the confidence level of the first status of the target substation equipment according to the first degradation amount and the second degradation amount further includes:

[0024] Performing a first preprocessing on the first monitoring data and the first test data corresponding to the first degradation amount and the second degradation amount, and recording the first preprocessing result as the second monitoring data and the second test data;

[0025] A first smoothness threshold is set, and a first correlation coefficient of the second monitoring data and the second test data that meets the first smoothness threshold is solved.

[0026] As a preferred solution of the panoramic perception method for the insulation status of high-voltage equipment in a substation according to the present invention, the step of judging the confidence level of the first status of the target substation equipment according to the first degradation amount and the second degradation amount further includes:

[0027] If the first mutual correlation coefficient meets the preset first mutual correlation coefficient threshold, the confidence level of the first state level of the target substation equipment meets the requirement, and the state level corresponding to the state score of the target substation equipment is credible;

[0028] Otherwise, the status level corresponding to the target substation equipment status score is not credible.

[0029] As a preferred solution of the method for panoramic perception of insulation status of high-voltage equipment in substations according to the present invention, the state perception according to the confidence judgment result includes:

[0030] If the status level corresponding to the status score of the target substation equipment is credible, an alarm notification sheet for the status level is sent to the equipment operation and maintenance department according to the status level;

[0031] If the status level corresponding to the target substation equipment status score is not credible, the first monitoring data and the first test data of the target substation equipment are acquired again.

[0032] In a second aspect, the present invention provides a panoramic perception system for insulation status of high-voltage equipment in a substation, comprising:

[0033] A data acquisition module, used to acquire first monitoring data and first test data of target substation equipment;

[0034] A degradation analysis module, configured to perform degradation analysis on the first monitoring data and the first test data according to a preset degradation analysis strategy to obtain a first degradation amount and a second degradation amount;

[0035] A judgment module, configured to judge the confidence level of the first state level of the target substation equipment according to the first degradation amount and the second degradation amount;

[0036] The perception module is used to perceive the state based on the confidence judgment result.

[0037] In a third aspect, the present invention provides a computer device, comprising a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the above-mentioned method when executing the computer program.

[0038] In a fourth aspect, the present invention provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program implements the steps of the method described above when executed by a processor.

[0039] Compared with the prior art, the invention has the following beneficial effects: the invention proposes a panoramic perception method and system for the insulation state of high-voltage equipment in a substation, obtains first monitoring data and first test data of the target substation equipment; performs degradation analysis on the first monitoring data and the first test data according to a preset degradation analysis strategy to obtain a first degradation amount and a second degradation amount; judges the confidence of the first state level of the target substation equipment according to the first degradation amount and the second degradation amount; and performs state perception according to the confidence judgment result. By implementing the present application, the insulation state of the substation equipment can be monitored in real time, and potential faults and risks can be discovered in time, thereby improving the safety and reliability of the power grid operation. By comprehensively analyzing the monitoring data and the test data, the present application can more accurately assess the health status of the equipment and provide a scientific basis for the maintenance and replacement of the equipment. By adopting the panoramic perception method of the present application, the frequency and cost of manual inspections can be reduced, while improving the efficiency and accuracy of data processing. The present application can also provide support for the intelligent management of substations, optimize the operation and maintenance strategy through a data-driven decision-making process, and extend the service life of the equipment. The system design of the present application is flexible, easy to integrate into the existing substation monitoring system, and has good compatibility and scalability. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. 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 creative labor. Among them:

[0041] Figure 1 A method flow chart of a method and system for panoramic perception of insulation status of high-voltage equipment in a substation provided by an embodiment of the present invention;

[0042] Figure 2 A detailed flow chart of a method and system for panoramic perception of insulation status of high-voltage equipment in a substation provided by an embodiment of the present invention;

[0043] Figure 3A structural diagram of a neural network of a method and system for panoramic perception of insulation status of high-voltage equipment in a substation provided by an embodiment of the present invention;

[0044] Figure 4 A system topology diagram of a method and system for panoramic perception of insulation status of high-voltage equipment in a substation provided by an embodiment of the present invention;

[0045] Figure 5 A first partial discharge spectrum of a gas-insulated fully enclosed switchgear for a panoramic sensing method and system for the insulation status of high-voltage equipment in a substation provided by an embodiment of the present invention;

[0046] Figure 6 A second partial discharge spectrum of a gas-insulated fully enclosed switchgear for a panoramic sensing method and system for the insulation status of high-voltage equipment in a substation provided by an embodiment of the present invention;

[0047] Figure 7 An internal structural diagram of a computer device for a panoramic perception method and system for the insulation status of high-voltage equipment in a substation provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0048] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the drawings of the specification. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary persons in the art without creative work should fall within the scope of protection of the present invention.

[0049] Example 1

[0050] Reference Figure 1-Figure 7 , which is the first embodiment of the present invention, and provides a method and system for panoramic perception of insulation status of high-voltage equipment in a substation, including:

[0051] There are some problems in the existing related technologies, such as incomplete insulation status monitoring, low data processing efficiency, and inability to detect potential faults in a timely manner.

[0052] This application provides a method that can effectively solve the above-mentioned problems. Next, we will combine multiple embodiments to explain in detail how to implement the panoramic perception method for the insulation status of high-voltage equipment in substations;

[0053] Figure 1 A method flow chart of a method and system for panoramic perception of insulation status of high-voltage equipment in a substation is shown, including:

[0054] S101, obtaining first monitoring data and first test data of target substation equipment;

[0055] In an optional embodiment, the first monitoring data of the target substation equipment may be collected by a sensor, and the type of the first monitoring data may be some of the monitoring data of the high voltage equipment current, voltage, temperature and humidity, partial discharge, and gas;

[0056] In an optional embodiment, the current of the high voltage device can be collected by a sensor based on the magnetic sensitive sensing principle of the tunnel magnetoresistance effect (TMR); the voltage of the high voltage device can be collected by a sensor based on the vibration capacitance sensing principle of the micro-electromechanical system (MEMS); the temperature of the high voltage device can be collected by a sensor based on the surface temperature sensing principle of the surface acoustic wave (SAW); the humidity of the high voltage device can be collected by a sensor based on the internal humidity passive wireless sensing principle of the capacitor-inductor (LC); the partial discharge of the high voltage device can be collected by a sensor based on the partial discharge passive wireless sensing principle of the multi-level electromagnetic energy coupling;

[0057] In the embodiment of the present application, all monitoring data of the current, voltage, temperature and humidity, partial discharge, and gas of the high voltage equipment are selected as the first monitoring data;

[0058] In an optional embodiment, the first test data may be the inventory information and historical test data of the substation high-voltage equipment input into the grid management platform (asset domain) of the grid enterprise, wherein the historical test data include partial discharge during operation of gas-insulated fully enclosed combination electrical appliances, SF6 gas pressure, SF6 gas humidity, grounding cable leakage current, lightning arrester leakage current, line voltage, and the body temperature and partial discharge during operation of oil-immersed power transformers.

[0059] It should be noted that obtaining the first monitoring data and the first test data of the target substation equipment can achieve comprehensive coverage of the insulation status of the substation equipment and ensure the real-time and accuracy of the data. Through the comprehensive analysis of these monitoring data and test data, a more accurate assessment of the health status of the equipment can be made, thereby providing a scientific basis for the maintenance and replacement of the equipment.

[0060] S102, performing degradation analysis on the first monitoring data and the first test data according to a preset degradation analysis strategy to obtain a first degradation amount and a second degradation amount;

[0061] In the embodiment of the present application, the first monitoring data and the first test data are subjected to degradation analysis according to a preset degradation analysis strategy, and the first degradation amount and the second degradation amount are obtained, including:

[0062] The preset degradation analysis strategy includes a first degradation analysis strategy and a second degradation analysis strategy;

[0063] The first monitoring data obtains a first degradation amount through a first degradation analysis strategy;

[0064] The first test data is used to obtain a second degradation amount through a second degradation analysis strategy.

[0065] In an optional embodiment, the first degradation amount and the second degradation amount both include positive degradation and negative degradation, where positive degradation refers to an increase in the first monitoring data and the first test data, indicating that the insulation state of the high voltage equipment is degraded, such as SF6 gas humidity; negative degradation refers to a decrease in the first monitoring data and the first test data, indicating that the insulation state of the high voltage equipment is degraded, such as SF6 gas pressure;

[0066] In an optional embodiment, the preset degradation analysis strategy can be achieved by constructing an insulation state analysis neural network suitable for analyzing gas-insulated fully enclosed switchgear and oil-immersed power transformers, analyzing the positive degradation and negative degradation state quantities of insulation state perception data (monitoring data, test data) through thresholds, and finally obtaining the first degradation quantity and the second degradation quantity;

[0067] In an optional embodiment, the preset degradation analysis strategy can also be implemented by building a prediction model based on machine learning, which can predict the future insulation status trend of high-voltage equipment based on historical data and real-time monitoring data. In this way, potential risk points can be identified in advance, so that preventive measures can be taken to avoid sudden failures.

[0068] In an optional embodiment, the preset degradation analysis strategy can also be implemented by constructing a prediction model based on deep learning, which can learn the changing rules of the insulation state of high-voltage equipment by analyzing a large amount of historical monitoring data and real-time data. By utilizing the nonlinear mapping capability of the deep learning model, the future trend of the insulation state can be predicted more accurately, thereby providing strong support for the operation and maintenance decision-making of the substation. In addition, the deep learning model can also continuously improve the accuracy and reliability of the prediction through self-learning and optimization.

[0069] In the embodiment of the present application, a neural network suitable for analyzing the insulation state of gas-insulated fully enclosed combination electrical appliances and oil-immersed power transformers is selected and constructed. Figure 3 As shown, the positive degradation and negative degradation state quantities of the insulation state perception data (monitoring data, test data) are analyzed by threshold values, and finally the first degradation quantity and the second degradation quantity are obtained.

[0070] It should be noted that performing degradation analysis on the first monitoring data and the first test data according to the preset degradation analysis strategy to obtain the first degradation amount and the second degradation amount can more accurately identify and quantify the degree of deterioration of the insulation state, providing a scientific basis for the following steps to ensure the stable operation and safe maintenance of substation equipment.

[0071] S103, judging the confidence level of the first state level of the target substation equipment according to the first degradation amount and the second degradation amount;

[0072] In the embodiment of the present application, judging the confidence level of the first state level of the target substation equipment according to the first degradation amount and the second degradation amount includes:

[0073] Setting a first warning threshold and a first attention threshold;

[0074] The target substation equipment status score is calculated according to the first degradation amount and the second degradation amount in combination with the first warning threshold and the first attention threshold.

[0075] In an optional embodiment, the first warning threshold and the first attention threshold can be designed according to actual needs and are not limited here;

[0076] In an optional embodiment, no matter which specific values ​​the first warning threshold and the first attention threshold are set to, it is necessary to determine the specific degree of degradation based on the first degradation amount and the second degradation amount, and obtain the corresponding target substation equipment status score based on the specific degree of degradation.

[0077] In the embodiment of the present application, judging the confidence level of the first state level of the target substation equipment according to the first degradation amount and the second degradation amount further includes:

[0078] According to the target substation equipment status score and the preset status level classification standard, determine the status level corresponding to the target substation equipment status score;

[0079] The preset status level classification standard includes several scoring intervals, and each scoring interval corresponds to a unique status level.

[0080] In an optional embodiment, there may be many kinds of preset status level classification standards, but most of them divide the levels into several scoring intervals, and each scoring interval corresponds to a unique status level. Relevant technicians can set specific status levels according to actual needs, such as normal state, attention state, abnormal state, serious state, fault state, etc. Each state corresponds to a certain scoring value or scoring interval, generally using a percentage system, and can also use a ten-point system or a one-point system (i.e., normalization processing), which is not limited here.

[0081] In the embodiment of the present application, a percentage system is adopted, and four states are divided into normal state, caution state, abnormal state, and severe state, and the equipment insulation state level classification is designed as shown in Table 1:

[0082] Table 1: Classification of equipment insulation status

[0083]

[0084] In the embodiment of the present application, the attention value is x z , the warning value is x j , the last three state perception data (first monitoring data, first test data) are x, x1, x2, where x is the latest input state perception data, x1 is the state perception data t1 years ago (relative to x), x2 is the state perception data t2 years ago (relative to x), and t2>t1;

[0085] If the state variable sets the first warning threshold, then x'=x j ;

[0086] If the state variable sets the first attention threshold, then x'=1.3x z (positive degradation) or x' = x z / 1.3 (negative degradation);

[0087] In the embodiment of the present application, the analysis formula for the first monitoring data is as follows:

[0088]

[0089] Among them, G refers to the device status score, G i refers to the i-th device status score, x f It is the average value of the monitoring data of the state quantity on the same device;

[0090] In the embodiment of the present application, the analysis formula for the test data is shown as follows:

[0091] The first test data positive degradation analysis formula:

[0092]

[0093] The first test data negative degradation analysis formula:

[0094]

[0095] Among them, G refers to the insulation status score of the equipment, G i refers to the insulation status score of the i-th equipment,

[0096] In the embodiment of the present application, judging the confidence level of the first state level of the target substation equipment according to the first degradation amount and the second degradation amount further includes:

[0097] Performing a first preprocessing on the first monitoring data and the first test data corresponding to the first degradation amount and the second degradation amount, and recording the first preprocessing result as the second monitoring data and the second test data;

[0098] A first smoothness threshold is set, and a first correlation coefficient of the second monitoring data and the second test data that meets the first smoothness threshold is solved.

[0099] In an optional embodiment, the first preprocessing may include denoising the raw monitoring data to eliminate possible random noise interference. Or / and applying data smoothing techniques, such as sliding average or exponential smoothing, to reduce the volatility of the data. Or / and normalizing the data to ensure that data of different magnitudes are analyzed on the same scale. Or / and using filtering algorithms, such as Kalman filtering, to improve the accuracy and reliability of the data. Or / and interpolating the data to fill in data gaps caused by equipment failure or communication interruption. Or / and extracting features from the data to identify the most valuable features for insulation status analysis. Or / and using statistical methods, such as principal component analysis (PCA), to reduce data dimensionality while retaining key information. Or / and performing time series analysis on the data to identify and predict the trend of insulation status changes over time.

[0100] In the embodiment of the present application, the first preprocessing only considers the most basic denoising processing;

[0101] In the embodiment of the present application, in order to quantitatively compare the state perception results of the first monitoring data and the first test data and the insulation state level confidence, the smoothness coefficient r and the correlation coefficient R of the two types of state perception data are introduced. The smoothness coefficient r and the correlation coefficient R are shown in the following formula:

[0102]

[0103] Among them, f(i) represents the original sequence of monitoring data and test data, It represents the reconstructed sequence after data denoising, N is the time series length of monitoring data and test data, and the smaller the smoothness coefficient is, the better the effect of extracting effective information from the original sequence is.

[0104]

[0105] Among them, x i ,y i Respectively represent the time series of monitoring data and test data before and after denoising, Cov(x i ,y i) is the time series x i ,y i The covariance of x , σ y They are x i ,y i The standard deviation of

[0106] In the embodiment of the present application, judging the confidence level of the first state level of the target substation equipment according to the first degradation amount and the second degradation amount further includes:

[0107] If the first mutual correlation coefficient meets the preset first mutual correlation coefficient threshold, the confidence level of the first state level of the target substation equipment meets the requirement, and the state level corresponding to the state score of the target substation equipment is credible;

[0108] Otherwise, the status level corresponding to the target substation equipment status score is not credible.

[0109] In the embodiment of the present application, when the correlation coefficient R is greater than 0.9 (the first correlation coefficient threshold), it indicates that the analysis result of the insulation status level of the high voltage device is credible.

[0110] It should be noted that the benefit of judging the confidence of the first state level of the target substation equipment according to the first degradation amount and the second degradation amount is that it can provide a more accurate and reliable equipment state assessment. By comparing the smoothness coefficient and the correlation coefficient of the monitoring data and the test data, the noise and non-correlated changes in the data can be effectively identified, thereby improving the accuracy of the state assessment. In addition, by setting a reasonable threshold of the correlation coefficient, it can be ensured that the assessment of the state level is only considered credible when there is a sufficiently strong correlation between the data. This helps to avoid misjudgments caused by data fluctuations or accidental factors, and ensure the safe and reliable operation of high-voltage equipment in substations. In practical applications, this method can assist operation and maintenance personnel to promptly discover potential insulation problems of equipment, take preventive measures, reduce the occurrence of power outages, and improve the stability and power supply quality of the power system.

[0111] S104: Perform state perception based on the confidence judgment result.

[0112] In the embodiment of the present application, performing state perception according to the confidence judgment result includes:

[0113] If the status level corresponding to the status score of the target substation equipment is credible, an alarm notification sheet for the status level is sent to the equipment operation and maintenance department according to the status level;

[0114] If the status level corresponding to the target substation equipment status score is not credible, the first monitoring data and the first test data of the target substation equipment are acquired again.

[0115] In an optional embodiment, alarm notifications for different status levels may contain different color codes and priority markings so that operation and maintenance personnel can quickly identify the current status of the equipment. For example, green indicates that the equipment is operating normally, yellow indicates that the equipment has potential risks and needs attention, and red indicates that the equipment has serious problems and immediate measures need to be taken. In addition, the alarm notification can also detail the nature of the problem, possible causes, and recommended treatment measures to help operation and maintenance personnel diagnose and repair faults more effectively. In this way, the state perception system can not only provide real-time equipment status information, but also assist operation and maintenance personnel in making more scientific and reasonable decisions, thereby improving the operating efficiency and safety of the entire substation.

[0116] In an optional embodiment, the method can also be detailed as follows Figure 2 As shown in the flowchart, input current, voltage, temperature and humidity, partial discharge, and gas monitoring data 201: collect and input various monitoring data during the operation of high-voltage equipment, including current, voltage, temperature, humidity, partial discharge, gas and other information. Analyze the positive and negative degradation degree of high-voltage equipment through monitoring data 202: Analyze and judge the degree of positive and negative polarity degradation of high-voltage equipment based on the collected monitoring data. Input the ledger information and test data of high-voltage equipment 203: Input the basic information and historical test data of high-voltage equipment. Analyze the positive and negative degradation degree of high-voltage equipment through test data 204: Use historical test data to further analyze the degree of positive and negative polarity degradation of high-voltage equipment. Solve the initial value of the insulation state level of high-voltage equipment 205: Based on the above analysis results, calculate the initial value of the current insulation state level of high-voltage equipment. Draw the time series of high-voltage equipment monitoring data and test data 206: Draw the monitoring data and test data into a chart or curve in chronological order. Confirm whether the analysis result of the insulation state level of high-voltage equipment is credible 207: Verify the insulation state level obtained previously to ensure its reliability. For poor insulation conditions that are serious, abnormal, or require attention, issue a warning notice 208: If the equipment is found to be in a serious, abnormal, or attention-requiring poor insulation condition, issue a warning notice in a timely manner.

[0117] In summary, the present invention proposes a panoramic perception method for the insulation state of high-voltage equipment in a substation, obtaining first monitoring data and first test data of the target substation equipment; performing degradation analysis on the first monitoring data and the first test data according to a preset degradation analysis strategy to obtain a first degradation amount and a second degradation amount; judging the confidence of the first state level of the target substation equipment according to the first degradation amount and the second degradation amount; and performing state perception according to the confidence judgment result. By implementing the present application, the insulation state of the substation equipment can be monitored in real time, and potential faults and risks can be discovered in time, thereby improving the safety and reliability of the power grid operation. The present application can more accurately evaluate the health status of the equipment by comprehensively analyzing the monitoring data and the test data, and provide a scientific basis for the maintenance and replacement of the equipment. The panoramic perception method of the present application can reduce the frequency and cost of manual inspections, while improving the efficiency and accuracy of data processing. The present application can also provide support for the intelligent management of substations, optimize the operation and maintenance strategy through a data-driven decision-making process, and extend the service life of the equipment. The system design of the present application is flexible, easy to integrate into the existing substation monitoring system, and has good compatibility and scalability.

[0118] This embodiment also provides a panoramic perception system for the insulation status of high-voltage equipment in a substation, including:

[0119] A data acquisition module, used to acquire first monitoring data and first test data of target substation equipment;

[0120] A degradation analysis module, used to perform degradation analysis on the first monitoring data and the first test data according to a preset degradation analysis strategy to obtain a first degradation amount and a second degradation amount;

[0121] A judgment module, used to judge the confidence level of the first state level of the target substation equipment according to the first degradation amount and the second degradation amount;

[0122] The perception module is used to perceive the state based on the confidence judgment result.

[0123] The above-mentioned unit modules may be embedded in or independent of a processor in a computer device in the form of hardware, or may be stored in a memory in a computer device in the form of software, so that the processor can call and execute operations corresponding to the above-mentioned modules.

[0124] This embodiment also provides a computer device, which may be a terminal, and its internal structure diagram may be as shown in FIG. Figure 7As shown. The computer device includes a processor, a memory, a communication interface, a display screen and an input device connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be achieved through WIFI, an operator network, NFC (near field communication) or other technologies. When the computer program is executed by the processor, a panoramic perception method for the insulation status of high-voltage equipment in a substation is implemented. The display screen of the computer device can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covered on the display screen, or a button, trackball or touchpad set on the computer device housing, or an external keyboard, touchpad or mouse.

[0125] This embodiment further provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the following steps are implemented:

[0126] Acquire first monitoring data and first test data of target substation equipment;

[0127] Performing degradation analysis on the first monitoring data and the first test data according to a preset degradation analysis strategy to obtain a first degradation amount and a second degradation amount;

[0128] Judging the confidence level of the first state level of the target substation equipment according to the first degradation amount and the second degradation amount;

[0129] The state perception is performed based on the confidence judgment results.

[0130] Example 2

[0131] According to another aspect of an embodiment of the present invention, a substation high-voltage equipment insulation status monitoring system is also provided, which is used to carry the substation high-voltage equipment insulation status analysis method and system thereof, and to construct a monitoring system that can monitor the current I, voltage U, partial discharge PD, temperature T, humidity %RH, and gas SF6 insulation status monitoring data of gas-insulated fully enclosed combination electrical appliances and oil-immersed power transformers in 110 kV to 500 kV substations, as well as the partial discharge, SF6 gas pressure, SF6 gas humidity, grounding cable leakage current, lightning arrester leakage current, line voltage of gas-insulated fully enclosed combination electrical appliances during operation, and the body temperature of oil-immersed power transformers and partial discharge insulation status test data during operation. Among them, the software quality of the panoramic perception system for the insulation status of high-voltage equipment complies with the provisions of GB / T 16260.1 "Software Engineering Product Quality Part 1: Quality Model", GB / T 16260.2 "Software Engineering Product Quality Part 2: Internal Quality", GB / T 16260.3 "Software Engineering Product Quality Part 3: External Quality", and GB / T16260.4 "Software Engineering Product Quality Part 4: Measurement of Quality in Use". The levels of the panoramic perception system for the insulation status of high-voltage equipment include physical layer, sensor layer, transmission layer, logic layer, and presentation layer.

[0132] As an optional embodiment, the physical layer is the high-voltage equipment of the substation whose insulation state is sensed, including gas-insulated fully enclosed switchgear and oil-immersed power transformers. Among them, the normal and special use conditions of oil-immersed power transformers shall comply with the provisions of GB 1094.1 "Power Transformers Part 1: General Principles", and their operating voltage shall generally not be higher than 105% of the operating tap voltage, and shall not exceed the maximum operating voltage of the system; when the transformer has serious defects (such as abnormal cooling system, serious oil leakage, local overheating, abnormal analysis results of dissolved gas in oil, etc.) or insulation weaknesses, it is not suitable to operate at over-rated current; when the technicians of the patrol and maintenance center of the substation management office find abnormal phenomena in the operation of oil-immersed power transformers, they should report to their superiors and keep records, and try to eliminate them as soon as possible; when a fault that endangers the safety of the transformer occurs and the relevant protection devices of the transformer refuse to operate, the technicians of the patrol and maintenance center should immediately shut down the transformer. The operating environment of gas-insulated fully enclosed switchgear shall be selected according to the normal and special operating conditions specified in GB / T 11022 "Industrial Sulfur Hexafluoride", and it shall be specified whether it is installed indoors or outdoors, in cold or high-altitude areas; the tests of gas-insulated fully enclosed switchgear include live detection tests, routine tests, diagnostic tests and pre / post-disassembly and maintenance tests; routine tests are to inspect the equipment according to standards within the specified period to provide a basis for equipment status evaluation; online monitoring is to use existing detection technology to monitor defect change trends or find defect starting points after discovering hidden dangers in the equipment; ultra-high frequency partial discharge detection is suitable for non-metallic long insulating basins, and insulators with metal shielding can be tested using the casting opening; SF6 gas humidity detection can be sampled from the density monitor, and purity detection requires that the purity of the arc chamber of the circuit breaker is not less than 97%.

[0133] As an optional embodiment, the sensing layer is used to collect monitoring data of high-voltage equipment in the substation, including current, voltage, temperature, humidity, and partial discharge sensors; a magnetic sensitive sensing principle sensor based on the tunnel magnetoresistance effect (TMR) is used to collect current state sensing signals; a vibration capacitance sensing principle sensor based on the micro-electromechanical system (MEMS) is used to collect voltage state sensing signals; a surface temperature sensing principle sensor based on the surface acoustic wave (SAW) is used to collect temperature state sensing signals; an internal humidity passive wireless sensing principle sensor based on the capacitor-inductor (LC) is used to collect humidity state sensing signals; and a partial discharge passive wireless sensing principle sensor based on multi-level electromagnetic energy coupling is used to collect partial discharge state sensing signals.

[0134] As an optional embodiment, the transmission layer is used to provide data support services, including collecting insulation status monitoring data such as current, voltage, temperature and humidity, partial discharge, and gas from different sensors, and collecting inventory information and test data of substation high-voltage equipment in the power grid management platform; the transmission layer collects the substation site domain networking of insulation status monitoring data, and the redundant networking method preferably adopts one of the dual star network or ring network. The monitoring data site domain networking should use IPv4 addresses, and the IP address setting within the network should meet the requirements of uniqueness, manageability, continuity and scalability. The dual planes of the in-station dispatching data network should use independent IP address segments, of which plane A should use the 10.0.0.0 / 8 private address segment, and plane B should use the 20.0.0.0 / 8 address segment. The transmission of monitoring data within the station shall preferably adopt point-to-point communication and comply with the sampling value transmission provisions of DL / T860.91 "Substation communication networks and systems Part 9-1: Specific communication service mapping (SCSM) - Sampled values ​​over unidirectional multi-channel point-to-point serial communication links"; after accumulating practical experience, the sampling value transmission provisions of DL / T860.92 "Substation communication networks and systems Part 9-2: Specific communication service mapping (SCSM) - Sampled values ​​through ISO-IEC 8802-3GB / T 15629.3" may be adopted. The horizontal networking data network for collecting insulation status test data at the transmission layer should adopt a mechanism based on the DiffServ service model to solve network delay and congestion guarantee (Quality of Service, QoS). QoS measures such as port speed limit, traffic shaping, and queue scheduling should be adopted according to business needs to ensure network availability. When the wide area network link is congested, priority bandwidth should be guaranteed for services with high real-time requirements. Differentiated Services Code Point (DSCP) and EXP data fields should be used to identify business priorities. Among them, the monitoring data station domain network consists of serial port + Modbus, RS485 + MODBUS-RTU, and Ethernet.

[0135] As an optional embodiment, the logic layer performs data processing, including determining the positive and negative degradation of the insulation state of the substation high-voltage equipment, and analyzing the confidence level of the insulation state level of the substation high-voltage equipment; deploying a substation high-voltage equipment insulation state analysis neural network at the logic layer, such as Figure 3As shown in the figure, the neural network includes comprehensive analysis of monitoring data and test data to confirm the degradation status level of oil-immersed power transformers and gas-insulated fully enclosed switchgear. The time series of monitoring data and test data are established, and the smoothness coefficient r and correlation coefficient R of the two types of state perception data are solved to quantitatively compare the state perception results and the insulation state level confidence, so as to facilitate the fusion analysis of different types of data analysis results for the same equipment and the same insulation fault in the same neural network. After deploying the neural network for insulation status analysis of high-voltage equipment in substations, the logical layer of the panoramic perception system for insulation status of high-voltage equipment in substations uses this as a model to open up the corresponding insulation status data analysis sharing area for the latent faults of gas-insulated fully enclosed switchgear and oil-immersed power transformers, provide a data base platform for the system representation layer, and take state perception data as the core to integrate the source data and analysis results required by various data analysis algorithms for the same fault into the same data model object. The data sharing area can provide an effective way for the concurrent operation and evaluation calculation of various data analysis algorithms, that is, fault information groups of the same fault period or different fault periods can be accessed and processed by various analysis and processing subsystems at the same time. If the analysis of a certain insulation fault information by a subsystem does not meet the conditions, it will turn to process the fault information of other equipment.

[0136] As an optional embodiment, the presentation layer is used to display the ledger information, test data, detection data, insulation status level, time series, and confidence of the high-voltage equipment in the substation; the presentation layer server uses axis or axis2 and other related technologies to implement the interface service of the corresponding business and deploy .aar interface service. Get a valid WebService interface address; the presentation layer server publishes internal resources (web application, http protocol) on the service by establishing https service; the SSL VPN protocol provides basic authentication certificates and encryption and decryption algorithms. When transmitting data, it first shakes hands with the SSL VPN protocol server, reaches an agreement on a protocol version, automatically selects the encryption algorithm and authentication method, and then encrypts the sent data according to the encryption algorithm. The SSL VPN protocol decrypts according to the encryption algorithm and forwards it to the policy router after decryption; when the equipment operation and maintenance personnel of the production command center of the power supply bureau and the patrol and maintenance center of the substation management office access the presentation layer server, they can use parameters or different ports (publish multiple https services) to distinguish the resources to be jumped, and request the https service with a certificate request to avoid user name and password verification. https verifies the legitimacy of the certificate, and automatically jumps to the corresponding resource according to the csgdata parameter after verification.

[0137] The present invention is not limited to the above specific implementation methods. The above are only preferred implementation cases of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0138] Example 3

[0139] According to another aspect of the embodiment of the present invention, a more specific high voltage equipment insulation status panoramic perception system is provided. Figure 4 is a schematic diagram of a panoramic sensing system for the insulation status of a high voltage device according to an embodiment of the present invention. Figure 4 As shown, the system includes a physical layer, a sensor layer, a transmission layer, a logic layer, and a presentation layer, wherein the physical layer includes an oil-immersed power transformer and a gas-insulated fully enclosed switchgear; the sensor layer includes current, voltage, temperature, humidity, and partial discharge sensors; the transmission layer includes a vertical acquisition server, a horizontal acquisition server, a LAN switch, and an intranet switch; the logic layer includes a logic layer server, a real-time database server, and a relational database server; the presentation layer includes a presentation layer server, an engineer station, and an operator station; and each level of the system is connected to each other through a power dispatching data network.

[0140] The physical layer mainly includes two types of high-voltage equipment: oil-immersed power transformers and gas-insulated fully enclosed combination electrical appliances, which are deployed in the equipment area of ​​the substation; the connection group of the oil-immersed power transformer is YNa0d11, YNyn0d11 or YNyn0yn0+d, the maximum operating voltage on the high-voltage side is 550 kV, 252 kV or 126 kV, the capacity of the 500 kV single-phase autocoupled AC power transformer is 750 or 1000 MVA, the capacity of the 220 kV three-phase combination AC power transformer is 120, 150, 180 or 240 MVA, and the capacity of the 110 kV three-phase three-winding AC power transformer is 40, 50 or 63 MVA; the power system nominal voltage of the gas-insulated fully enclosed combination electrical appliances is 110 kV, 220 kV or 500 kV, and the rated voltage of the equipment is 220 kV, 180 kV or 240 MVA. The rated voltage is 126 kV, 252 kV or 550 kV; the rated current of the main circuit is preferably selected from the following values: 1000, 1250, 1600, 2000, 2500, 3150, 4000, 5000, 6300, 8000 amperes; the rated short-time withstand (thermal stability) current 1k (main circuit and grounding circuit) is preferably selected from the following values: 25, 31.5, 40, 50, 63, 80 or 100 kA; the temperature rise of the casing that is easily accessible to the operating personnel should not exceed 30K, the temperature rise of the casing that is easily accessible to the operating personnel but does not need to be touched during normal operation should not exceed 40K, and the temperature rise of the parts that are not touched by the operating personnel can be increased to 65K, but it should be ensured that the surrounding insulation and sealing materials are not damaged, and obvious high-temperature markings should be made.

[0141] The sensing layer mainly includes current, voltage, temperature, humidity, and partial discharge sensors, which are deployed in the equipment body of oil-immersed power transformers and gas-insulated fully enclosed switchgear in the equipment area of ​​the substation. The number of sensor measurement points is determined according to the number of high-voltage equipment to be monitored; the current and voltage sensors are non-invasive, and the temperature, humidity, and partial discharge sensors are passive wireless measurement types; the ambient temperature of the sensor is -40 degrees Celsius to +45 degrees Celsius, the relative humidity is 5% to 95%, the atmospheric pressure is 80 kPa to 110 kPa, the site safety requirements comply with the Class B safety regulations in GB / T 9361 "Computer Site Safety Requirements", and the safety requirements comply with GB 4943.1 "Information Technology Equipment Safety Part 1: General Requirements" related provisions, the rated voltage of the working power supply is AC 220V (l±15%), the working power supply frequency is 50±0.5Hz, the harmonic content of the working power supply is less than 5%, and the online rate of the monitoring sensor is not less than 99%; the measurement range of the leakage current sensor is 1 mA~1A, and the measurement of the overcurrent sensor is 1A~100kA; the measurement range of the working voltage sensor is 1V~750kV, the measurement range of the overvoltage sensor is 100kV~1800kV, the measurement range of the temperature sensor is -40~+160 degrees Celsius, the measurement accuracy is better than ±0.4 degrees Celsius, the humidity detection limit is better than 1000μL / L, and the measurement accuracy of the partial discharge sensor is 1pC; the test classification and test items of the sensor should comply with DL / T 1432.1 "Inspection Specifications for Online Monitoring Devices for Substation Equipment Part 1: General Inspection Specifications", working conditions and technical requirements shall comply with the provisions of DL / T1498.1 "Technical Specifications for Online Monitoring Devices for Substation Equipment Part 1: General Rules".

[0142] The transmission layer mainly includes vertical collection servers, horizontal collection servers, LAN switches, and intranet switches, which are deployed in the communication room of the substation where the power supply bureau's patrol and maintenance center is located, with one set in each.

[0143] The vertical collection server and horizontal collection server of the transmission layer are both NF5280M5 2U rack servers, equipped with four 8-core Xeon E7-8893 V4 series CPUs, 14 nanometers, supporting hyperthreading, with a cache of no less than 25 megabytes, an original main frequency of no less than 3.2 GHz, and a bus specification of QPI 9.6GT / s; the memory configuration is no less than 128 gigabytes of DDR4 memory, the maximum total number of memory slots is no less than 64, and the slot type is LGA 2011; the hard disk configuration is four 600 gigabyte, 12,000 rpm serial-attached SCSI hard disks; the network card is equipped with 8 independent 10 / 100 / 1000M-BaseT Ethernet ports;

[0144] The data exchange, customized protocol, deployment architecture, data transmission security specifications, and protection mechanisms of the transport layer vertical collection server shall comply with the provisions of Q / CSG 1210017 "Technical Specifications for Internal and External Network Data Security Exchange Platform", Q / CSG 1210007 "Data Transmission Security Standards", and Q / CSG 1204009 "Technical Specifications for Security Protection of Power Monitoring Systems". The monitoring data of oil-immersed power transformers and gas-insulated fully enclosed combination electrical appliances collected by current, voltage, temperature, humidity, and partial discharge sensors shall be collected through the LAN switch to provide data services for the real-time database server; the transport layer vertical collection server shall scan the exchanged data and instructions through the firewall, close abnormal ports, and prevent intrusion.

[0145] Optionally, data exchange refers to the transmission, reception, interpretation and analysis of data.

[0146] The data exchange, customized protocols, deployment architecture, data transmission security specifications, and protection mechanisms of the horizontal collection server at the transport layer shall comply with the provisions of Q / CSG 1210017 "Technical Specifications for Intranet and Extranet Data Security Exchange Platforms", Q / CSG 1210007 "Data Transmission Security Standards", and Q / CSG 1204009 "Technical Specifications for Security Protection of Power Monitoring Systems"; collect relevant information (including ledger information and test data) about oil-immersed power transformers and gas-insulated fully enclosed combination electrical appliances from the intermediate library server of the power grid management platform (asset domain) through the intranet switch, and provide data services for the relational database server.

[0147] The number of intranet switches is 1 set, which is deployed in the communication room of the substation where the patrol and maintenance center of the power supply bureau is located. The physical interface, protocol, interconnection and compatibility requirements of the intranet switch shall comply with the provisions of Q / CSG 1204016.3 "Part 3: Technical Requirements for Data Network Equipment". It is used to connect the transmission layer horizontal acquisition server, relationship database data server, logic layer server, presentation layer server, engineer station, and operator station through the power dispatching data network composed of optical fibers;

[0148] The number of LAN switches is 1 set, which is deployed in the communication room of the substation where the patrol and maintenance center of the power supply bureau is located. It is equipped with 24 10 / 100 / 1000 Mbps adaptive electrical ports, with a switching capacity of not less than 150 Mbps, a second and third layer packet forwarding capacity of not less than 95 Mbps, a concurrent flow statistics of not less than 400,000, a data message forwarding delay of less than 1 millisecond, and supports LDP MD5, VRRP MD5, and NTP MD5 encryption authentication. The LAN switch is used to connect the vertical collection server and the real-time library data server through the power dispatching data network composed of optical fibers.

[0149] The logic layer mainly includes logic layer servers, real-time database servers, and relational database servers, which are deployed in the information room of the substation where the power supply bureau's patrol and maintenance center is located, with one set in each.

[0150] The logic layer server is an NP3020 M5 tower server, equipped with four 10-core Xeon-Silver series CPUs, supporting hyperthreading, with a cache of no less than 20 megabytes and an original main frequency of no less than 3.4 GHz; the memory is configured as no less than 128 gigabytes of DDR4 memory, and the maximum total number of memory slots is no less than 64; the hard disk is configured as two 600 gigabyte, 12,000 rpm serial attached SCSI hard disks;

[0151] The real-time database server and relational database server are both NF5280M5 2U rack-mounted servers, equipped with two 8-core Xeon E7 V4 series CPUs, supporting hyperthreading, with a cache of no less than 25 megabytes and an original main frequency of no less than 1.9 GHz; the memory configuration is no less than 128 gigabytes of DDR4 memory, and the maximum total number of memory slots is no less than 64; the hard disk configuration is 4 600 gigabyte, 12,000 rpm serial-attached SCSI hard disks; the network card is equipped with 8 independent 10 / 100 / 1000M-BaseT Ethernet ports;

[0152] The logic layer server deploys a neural network for analyzing the insulation status of high-voltage equipment. The input layer inputs the current, voltage, temperature and humidity, partial discharge, and gas monitoring data of the oil-immersed power transformer and the gas-insulated fully enclosed combination electrical appliance at a specific moment, the partial discharge during operation of the gas-insulated fully enclosed combination electrical appliance, SF6 gas pressure, SF6 gas humidity, grounding cable leakage current, lightning arrester leakage current, and line voltage test data, as well as the body temperature of the oil-immersed power transformer and partial discharge test data during operation; the hidden layer analyzes the positive and negative degradation degrees of the high-voltage equipment, solves the initial value of the insulation status level of the high-voltage equipment, plots the time series of the monitoring data and test data of the high-voltage equipment, and confirms the analysis results of the insulation status level of the high-voltage equipment; the output layer outputs the positive and negative degradation degrees of the insulation status of the high-voltage equipment, the time series of the status perception data, the insulation status level and its confidence, and provides data services to the presentation layer server through the intranet switch.

[0153] The real-time database data server and the relational database data server are used to store the monitoring data, test data, and ledger information of oil-immersed power transformers and gas-insulated fully enclosed combination electrical appliances, as well as the positive and negative degradation degree of the insulation status of high-voltage equipment, the time series of state perception data, the insulation status level and its confidence level. Its data exchange, customized protocols, data transmission security specifications, and protection mechanisms should comply with the provisions of GB / T20273 "Technical Requirements for Database Management System Security" and Q / CSG1210007 "Data Transmission Security Standards". Its relational database data server is used to store test data, ledger information, and insulation status analysis related data. The real-time database data server is used to store monitoring data and provide data services to the logic layer server through the intranet switch.

[0154] The presentation layer mainly includes presentation layer servers, engineer stations, and operator stations. The presentation layer servers are deployed in the communication room of the substation where the power supply bureau's patrol and maintenance center is located. The engineer station and operator station are deployed in the main control room of the substation where the power supply bureau's patrol and maintenance center is located. The number of each is 1 set.

[0155] The presentation layer server is a NF5280M5 2U rack-mounted server, equipped with two 8-core Xeon E7 V4 series CPUs, supporting hyperthreading, with a cache of no less than 25 megabytes and an original main frequency of no less than 1.9 GHz; the memory is configured as no less than 128 gigabytes of DDR4 memory, and the maximum total number of memory slots is no less than 64; the hard disk is configured as four 600-gigabyte, 12,000-rpm serial-attached SCSI hard disks; the network card is equipped with eight independent 10 / 100 / 1000M-BaseT Ethernet ports;

[0156] The access technical measures of the presentation layer server shall comply with the provisions of Q / CSG 1204009 "Technical Specifications for Security Protection of Power Monitoring Systems", and the management measures shall comply with the provisions of Q / CSG 212001 "Management Measures for Security Protection of Power Monitoring Systems". Its application system requirements shall comply with the provisions of DL / T 1352 "Technical Guidelines for Power Emergency Command Centers". The system's access verification requirements for equipment operation and maintenance personnel in the production command center of the power supply bureau and the patrol and maintenance center of the substation management office shall comply with the provisions of GB / T 20272 "Technical Requirements for Operating System Security".

[0157] The engineer station uses a ThinkStation P920 series dual-core workstation.

[0158] The configuration principles and technical requirements of the engineer station should comply with the requirements of Q / CSG 1203005 "Technical Guidelines for Power Secondary Equipment" regarding computer monitoring systems, and be used to provide services for system administrators to maintain a panoramic perception system for the insulation status of high-voltage equipment.

[0159] The operator station uses the ThinkStation K series workstation.

[0160] The configuration principles and technical requirements of the operator station shall comply with the requirements of Q / CSG 1203005 "Technical Guidelines for Power Secondary Equipment" regarding computer monitoring systems, and shall be used to provide technical services for system managers and on-duty personnel regarding monitoring and early warning, emergency response, load transfer, emergency repairs, technical transformation and repair, and material allocation.

[0161] Example 4

[0162] In the specific installation and deployment process of the panoramic perception system for the insulation status of high-voltage equipment, first, select the annual key substations, especially the oil-immersed power transformers and gas-insulated fully enclosed combination electrical appliances with historical defects and family defects. Secondly, install the current, voltage, temperature, humidity, and partial discharge sensors on the equipment body of the oil-immersed power transformers and gas-insulated fully enclosed combination electrical appliances. The number of sensor measurement points is determined according to the number of high-voltage equipment to be monitored. Thirdly, deploy the vertical acquisition server, horizontal acquisition server, LAN switch, and intranet switch of the transmission layer in the communication room of the substation where the power supply bureau's patrol and maintenance center is located, deploy the logic layer server, real-time database server, and relational database server of the logic layer in the information room of the substation where the power supply bureau's patrol and maintenance center is located, deploy the presentation layer server of the presentation layer in the communication room of the substation where the power supply bureau's patrol and maintenance center is located, and deploy the engineer station and operator station of the presentation layer in the main control room of the substation where the power supply bureau's patrol and maintenance center is located. The number of the above system equipment is 1 set. Finally, the production command center of the power supply bureau should conduct routine monitoring and analysis of the insulation status of high-voltage equipment every day, monitor and track the defects and hidden dangers of high-voltage equipment in key substations of the year, promptly issue technical supervision early warning notices to the substation management office, and track them to the node closed loop.

[0163] The technical staff of the Production Command Center of the Power Supply Bureau discovered that the sensors of the panoramic perception system for the insulation status of high-voltage equipment collected two partial discharge PD signals of gas-insulated fully enclosed combination electrical appliances. With the assistance of the neural network for analyzing the insulation status of high-voltage equipment, it was preliminarily believed that the insulation status of the first partial discharge location was at an abnormal level, and the confidence correlation coefficient R reached 0.95, and the second partial discharge location was at a caution level, and the confidence correlation coefficient R was 0.81. Based on the results of the neural network for analyzing the insulation status of high-voltage equipment, the technical staff of the Production Command Center of the Power Supply Bureau issued a technical supervision early warning notice to the substation management office of the power supply bureau to which the high-voltage equipment belongs. The equipment operation and maintenance personnel of the patrol and maintenance center of the substation management office of the power supply bureau used the equipment operation and maintenance experience to diagnose the discharge signal spectrum and analyze the discharge signal spectrum of the first gas-insulated fully enclosed combination electrical appliance (such as Figure 5As shown in the figure, the phase difference between the two groups of partial discharge signal clusters is 180 degrees. On the basis of unchanged voltage, the signal amplitude is basically the same. From the φ-qt, the signal distribution is obvious and the duration is long. The phase difference between the two partial discharge signals is also 180 degrees. Therefore, it is judged to be a real partial discharge. The equipment operation and maintenance personnel analyzed the discharge signal spectrum of the second gas-insulated fully enclosed combination electrical appliance (as shown in the figure). Figure 6 As shown in the figure, it can be seen that the signal appears in 4 groups, but from the phase point of view, it is actually three groups of local discharge signal clusters, and the phase difference between the groups is 120°. It is judged to be the three-phase corona radiation phenomenon of the overhead line in the substation, that is, the air discharge interference signal.

[0164] The main implementation contents in the specific disposal process are as follows:

[0165] In an exemplary implementation, the Substation Management Office of the Power Supply Bureau, together with the Electric Power Research Institute and the Production and Technology Department of the Power Supply Bureau, carried out live detection and diagnostic tests on the insulation fully enclosed combined electrical equipment intervals based on the cases of partial discharge found through monitoring and early warning. Among them, live detection is used to further judge the operating status of the equipment. After the hidden dangers of the equipment are found, the existing ultra-high frequency partial discharge detection, ultrasonic partial discharge detection, SF6 gas humidity detection, SF6 gas decomposition detection and other technologies are used to analyze the evolution trend of insulation degradation or find the exact location of insulation defects; the use of diagnostic tests is an important means to detect the insulation status of running equipment, which can detect suspected defective parts in a targeted manner, and can be considered to be carried out under the condition that the equipment is not energized.

[0166] In an exemplary implementation, the production command center of the power supply bureau, in conjunction with the power dispatching department, guides the power supply bureau's substation management office to take emergency power outage and load transfer measures for equipment that has been confirmed to have discharge faults through live detection and diagnostic tests, and guides power restoration based on the results of emergency fault handling and faulty equipment maintenance to ensure safe and stable operation of the power system. Among them, the maintenance of faulty equipment must comply with the relevant guidelines and process requirements of the high-voltage equipment manufacturer, and formulate special maintenance plans and operating instructions. The operating instructions clearly define the maintenance environment, organizational measures, technical measures, safety measures, procedures, process quality standards and other requirements, and the maintenance implementation strictly follows the operating instructions. The maintenance of faulty equipment mainly includes the inspection and maintenance of circuit breakers, the inspection and maintenance of busbars, the inspection and maintenance of cables directly connected, the inspection and maintenance of power transformers directly connected, and the inspection and maintenance of disconnectors, grounding switches and fast grounding switches.

[0167] In an exemplary implementation, the power supply bureau's substation management office and the supply chain department purchase or deploy spare parts that need to be replaced, including switchgear, removable connections, supporting insulators, compartments, partitions, bushings, main circuits and other maintenance and technical transformation materials, for specific high-voltage equipment with discharge faults, to support emergency repairs and power restoration. Spare parts should be provided by the original manufacturer with the same material and quality as the original equipment. Spare parts should be processed and packaged as required, and boxed separately. The boxes should be clearly marked, and spare parts should indicate the validity period and necessary structural drawings. Electrical coils and other precision electrical components, instruments, meters, etc. must first be placed in plastic bags with desiccant, or protected by other effective methods before packaging; special tools and instruments should be accompanied by technical parameters, instruction manuals and other information.

[0168] In an exemplary embodiment, after emergency response and technical transformation and repair, equipment maintenance personnel at the maintenance center of the power supply bureau's substation management office will conduct panoramic perception of the equipment's insulation status, determine whether the monitoring sampling points are sufficient and the locations are appropriate, and propose plans for adding and adjusting sensors.

[0169] Example 5

[0170] According to another aspect of an embodiment of the present invention, a computer solid-state readable storage medium is also provided, which includes a program developed based on an integrated development environment (IDE), wherein when the program is running, the device where the computer solid-state readable storage medium is located is controlled to execute any one of the above-mentioned methods for analyzing the insulation status of high-voltage equipment in a substation.

[0171] Optionally, in this embodiment, the above-mentioned computer solid-state readable storage medium can be located in any computer terminal in a computer terminal group in a computer network, or in any mobile terminal in a mobile terminal group, and the above-mentioned computer solid-state readable storage medium includes a stored program.

[0172] According to another aspect of an embodiment of the present invention, a central processing unit is further provided. The central processing unit is used to run a program, wherein any one of the above-mentioned high-voltage device insulation status analysis methods is executed when the program is run.

[0173] An embodiment of the present invention provides a device, which includes a central processing unit, a memory, and a program stored in the memory and executable on the central processing unit. When the central processing unit executes the program, steps of a method for analyzing the insulation status of a high-voltage device are implemented.

[0174] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0175] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0176] In several embodiments provided in the present application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the system embodiments described above are only schematic, for example, the division of units can be a logical function division, and there can 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, the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, and the indirect coupling or communication connection of units or modules can be electrical or other forms. The unit described as a separate component may or may not be physically separated, and the component displayed as a unit may or may not be a physical unit, that is, it can be located in one place, or it can be distributed on multiple units. Some or all of the units can be selected according to actual needs to achieve the purpose of the scheme of this embodiment.

[0177] 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 integrated unit may be implemented in the form of hardware or in the form of software functional modules.

[0178] If the integrated unit is implemented in the form of a software function module 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, which is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the methods of various embodiments of the present invention. The aforementioned storage medium includes: USB flash drives, read-only memories (ROM), random access memories (RAM), solid-state hard disk memories, magnetic disks or optical disks, and other media that can store program codes.

[0179] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A panoramic perception method for the insulation status of high-voltage equipment in a substation, characterized in that: include: Acquire first monitoring data and first test data of target substation equipment; Performing degradation analysis on the first monitoring data and the first test data according to a preset degradation analysis strategy to obtain a first degradation amount and a second degradation amount; Determining the confidence level of the first state level of the target substation equipment according to the first degradation amount and the second degradation amount; The state perception is performed based on the confidence judgment results.

2. The method for panoramic perception of insulation status of high-voltage equipment in a substation according to claim 1, characterized in that: The step of performing degradation analysis on the first monitoring data and the first test data according to a preset degradation analysis strategy to obtain a first degradation amount and a second degradation amount includes: The preset degradation analysis strategy includes a first degradation analysis strategy and a second degradation analysis strategy; The first monitoring data obtains a first degradation amount through a first degradation analysis strategy; The first test data is used to obtain a second degradation amount through a second degradation analysis strategy.

3. The method for panoramic perception of insulation status of high-voltage equipment in a substation according to claim 2, characterized in that: The determining of the confidence level of the first state level of the target substation equipment according to the first degradation amount and the second degradation amount includes: Setting a first warning threshold and a first attention threshold; The target substation equipment status score is calculated according to the first degradation amount and the second degradation amount in combination with the first warning threshold and the first attention threshold.

4. The method for panoramic perception of insulation status of high-voltage equipment in a substation according to claim 3, characterized in that: The determining of the confidence level of the first state level of the target substation equipment according to the first degradation amount and the second degradation amount further includes: According to the target substation equipment status score and in combination with a preset status level classification standard, determine the status level corresponding to the target substation equipment status score; The preset status level classification standard includes a plurality of scoring intervals, and each scoring interval corresponds to a unique status level.

5. The method for panoramic perception of insulation status of high-voltage equipment in a substation according to claim 4, characterized in that: The determining of the confidence level of the first state level of the target substation equipment according to the first degradation amount and the second degradation amount further includes: Performing a first preprocessing on the first monitoring data and the first test data corresponding to the first degradation amount and the second degradation amount, and recording the first preprocessing result as the second monitoring data and the second test data; A first smoothness threshold is set, and a first correlation coefficient of the second monitoring data and the second test data that meets the first smoothness threshold is solved.

6. The method for panoramic perception of insulation status of high-voltage equipment in a substation according to claim 5, characterized in that: The determining of the confidence level of the first state level of the target substation equipment according to the first degradation amount and the second degradation amount further includes: If the first mutual correlation coefficient meets the preset first mutual correlation coefficient threshold, the confidence level of the first state level of the target substation equipment meets the requirement, and the state level corresponding to the state score of the target substation equipment is credible; Otherwise, the status level corresponding to the target substation equipment status score is not credible.

7. The method for panoramic perception of insulation status of high-voltage equipment in a substation according to claim 6, characterized in that: The state perception according to the confidence judgment result includes: If the status level corresponding to the status score of the target substation equipment is credible, an alarm notification sheet for the status level is sent to the equipment operation and maintenance department according to the status level; If the status level corresponding to the target substation equipment status score is not credible, the first monitoring data and the first test data of the target substation equipment are acquired again.

8. A panoramic perception system for insulation status of high-voltage equipment in substations, characterized in that: include: A data acquisition module, used to acquire first monitoring data and first test data of target substation equipment; A degradation analysis module, configured to perform degradation analysis on the first monitoring data and the first test data according to a preset degradation analysis strategy to obtain a first degradation amount and a second degradation amount; A judgment module, configured to judge the confidence level of the first state level of the target substation equipment according to the first degradation amount and the second degradation amount; The perception module is used to perceive the state based on the confidence judgment result.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

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