Method for monitoring and evaluating state of high-voltage electrical equipment in primary power system

Abstract

The invention provides a method for monitoring and evaluating the state of high-voltage electrical equipment in a power primary system, which belongs to the technical field of electrical automation and comprises the following steps: step 1, acquiring key parts of the high-voltage electrical equipment and key positions of a working environment of the high-voltage electrical equipment, and deploying corresponding sensor arrays at the key parts and the key positions; 2, monitoring and collecting the working data of the electrical equipment and the environmental data of the working environment of the electrical equipment based on a corresponding sensor array; 3, determining the working state of the high-voltage electrical equipment based on the collected working data of the electrical equipment and the environment data of the working environment of the electrical equipment; 4, if the working state of the high-voltage electrical equipment is in an abnormal state, triggering a corresponding early warning signal; and step 5, determining a maintenance scheme based on the early warning signal and maintaining the high-voltage electrical equipment. The real-time performance and comprehensiveness of monitoring are improved, potential faults can be found in time, and early warning can be triggered.

Description

Technical Field

[0001] The present invention relates to the field of electrical automation technology, and in particular to a method for monitoring and evaluating the status of high-voltage electrical equipment in a primary power system. Background Art

[0002] With the development of power systems and the growth of loads, high-voltage electrical equipment plays an important role in the primary power system, and its working state is crucial to the safe and stable operation of the power system. The normal operation of high-voltage electrical equipment is related to the reliability of the entire power system, so it is particularly important to ensure that the equipment operates under appropriate working conditions.

[0003] The existing state monitoring methods for high-voltage electrical equipment mainly rely on manual periodic inspection and analysis, and the staff judges the operating status of the equipment through manual inspection. However, this method has great limitations, such as long inspection cycle, low efficiency, and insufficient data accuracy. At the same time, some existing state monitoring systems can only detect certain parameters of the equipment in a single way, making it difficult to achieve comprehensive and real-time monitoring and diagnosis of the equipment. The existing monitoring methods have obvious defects in real-time, comprehensiveness and automation. The current system cannot quickly and accurately detect equipment failures and provide effective early warnings, which can easily lead to delayed detection of equipment failures, affecting the safety and economy of the system.

[0004] Therefore, the present invention provides a method for monitoring and evaluating the status of high-voltage electrical equipment in a primary power system. Summary of the invention

[0005] The present invention provides a method for monitoring and evaluating the status of high-voltage electrical equipment in a primary power system.

[0006] The method for monitoring and evaluating the state of high-voltage electrical equipment in a primary power system provided by the present invention comprises:

[0007] Step 1: Obtain key parts of high-voltage electrical equipment and key locations of the working environment of high-voltage electrical equipment, and deploy corresponding sensor arrays at the key parts and key locations;

[0008] Step 2: monitoring and collecting the working data of the electrical equipment and the environmental data of the working environment of the electrical equipment based on the corresponding sensor array;

[0009] Step 3: Determine the working state of the high-voltage electrical equipment based on the collected working data of the electrical equipment and the environmental data of the working environment of the electrical equipment;

[0010] Step 4: If the working state of the high-voltage electrical equipment is in an abnormal state, a corresponding early warning signal is triggered;

[0011] Step 5: Determine the maintenance plan based on the early warning signal and perform maintenance on the high-voltage electrical equipment.

[0012] According to the method for monitoring and evaluating the state of high-voltage electrical equipment in the primary power system provided by the present invention, key parts of the high-voltage electrical equipment and key positions of the working environment of the high-voltage electrical equipment are obtained, and corresponding sensor arrays are deployed at the key parts and key positions, including:

[0013] Analyze the structure of high-voltage electrical equipment and determine the key parts of each high-voltage electrical equipment;

[0014] Survey the working environment of high-voltage electrical equipment based on preset survey equipment to obtain environmental data of the working environment of high-voltage electrical equipment;

[0015] Analyze environmental data to determine key locations for the working environment of high-voltage electrical equipment;

[0016] Determine the type of key parameters to be monitored based on the key parts of the high-voltage electrical equipment and the key locations of the working environment;

[0017] Based on the type of key parameters, the sensors to be deployed at the key parts of each high-voltage electrical equipment and the key positions of each working environment are determined, thereby forming a sensor array for each key part of each high-voltage electrical equipment and each key position of the working environment.

[0018] According to the method for monitoring and evaluating the state of high-voltage electrical equipment in a primary power system provided by the present invention, the structure of the high-voltage electrical equipment is analyzed to determine the key parts of each high-voltage electrical equipment, including:

[0019] Consult the technical manual of the preset high-voltage electrical equipment to obtain the structure of each high-voltage electrical equipment and the functional parameters of each component;

[0020] Performing a first decomposition on the structure of each high-voltage electrical device based on the functional parameters of each component to obtain a plurality of first functional components of each high-voltage electrical device;

[0021] Performing a first analysis on all first functional components of each high-voltage electrical device, determining an initial risk level of each first functional component, and determining a first functional component having an initial risk level greater than a preset risk level as a second functional component;

[0022] Obtaining historical operation data of each high-voltage electrical device, thereby determining the historical failure frequency of the second functional component of each high-voltage electrical device, and determining the second functional component whose historical failure frequency is less than a preset failure frequency as the third functional component;

[0023] All third functional components of each high-voltage electrical equipment are identified as key parts.

[0024] According to the method for monitoring and evaluating the state of high-voltage electrical equipment in a primary power system provided by the present invention, the working data of the electrical equipment and the environmental data of the working environment of the electrical equipment are monitored and collected based on the corresponding sensor array, including:

[0025] Determine the monitoring priority of each key part based on the initial risk level and historical failure frequency of each third functional component of each high-voltage electrical equipment;

[0026] Determine the monitoring frequency of each key part based on the monitoring priority of each key part and the preset priority-frequency data table;

[0027] Determine the monitoring priority of each sensor in the sensor array at each key position of the working environment based on the sensor type and the preset sensor type-priority data table, and then determine the monitoring priority of each sensor array;

[0028] Determine the monitoring frequency of each key position in the working environment based on the monitoring priority of each key position in the working environment and a preset priority-frequency data table;

[0029] Based on the monitoring frequency of each key part, the monitoring frequency of each key position of the working environment and the corresponding sensor array, the working data of the electrical equipment and the environmental data of the working environment of the electrical equipment are monitored and collected.

[0030] According to the method for monitoring and evaluating the state of high-voltage electrical equipment in a primary power system provided by the present invention, the working state of the high-voltage electrical equipment is determined based on the collected working data of the electrical equipment and the environmental data of the working environment of the electrical equipment, including:

[0031] Analyze the collected working data of the electrical equipment and the environmental data of the working environment of the electrical equipment to determine several key parameter values ​​of the high-voltage electrical equipment;

[0032] The health index of each key parameter of each high-voltage electrical equipment is determined based on several key parameter values ​​of each high-voltage electrical equipment:

[0033]

[0034] Among them, HI ij is the health index of the jth key parameter of the ith high-voltage electrical equipment, H ij is the value of the jth key parameter of the ith high-voltage electrical equipment, is the preset maximum value of the jth key parameter of the ith high-voltage electrical equipment, is the preset critical value of the jth key parameter of the i-th high-voltage electrical equipment, and αij is the influence coefficient of the preset slight excess of the jth key parameter of the i-th high-voltage electrical equipment, and α ij ∈(0.1,0.3),γ ij is the preset serious exceeding influence coefficient of the jth key parameter of the i-th high-voltage electrical equipment, and γ ij ∈(0.3,0.7);

[0035] The comprehensive health index of each high-voltage electrical equipment is determined based on the health index of all key parameters of each high-voltage electrical equipment:

[0036]

[0037] Among them, U i is the comprehensive health index of the i-th high-voltage electrical equipment, w0 ij is the preset basic weight of the health index of the jth key parameter of the i-th high-voltage electrical equipment, β ij is the preset adjustment coefficient of the health index of the jth key parameter of the i-th high-voltage electrical equipment, is the preset reference value of the health index of the jth key parameter of the i-th high-voltage electrical equipment, is the preset critical value of the health index of the jth key parameter of the i-th high-voltage electrical equipment, μ i is the preset penalty coefficient of the i-th high-voltage electrical equipment;

[0038] The working status of each high-voltage electrical equipment is determined based on all key parameters and comprehensive health index of each high-voltage electrical equipment.

[0039] The method for monitoring and evaluating the state of high-voltage electrical equipment in a primary power system provided by the present invention is characterized in that the working state of each high-voltage electrical equipment is determined based on all key parameter values ​​and a comprehensive health index of each high-voltage electrical equipment, including:

[0040] Determine the working status value of each high-voltage electrical equipment based on all key parameter values ​​and comprehensive health index of each high-voltage electrical equipment:

[0041]

[0042] Among them, SI i is the working state value of the i-th high-voltage electrical equipment, w1 i is the preset weight of the comprehensive health index of the i-th high-voltage electrical equipment, w2 i is the preset weight of the key parameters of the i-th high-voltage electrical equipment, w1 ij is the preset weight of the jth key parameter of the ith high-voltage electrical equipment, U1 iis the preset maximum value of the comprehensive health index of the i-th high-voltage electrical equipment;

[0043] The working state of each high-voltage electrical device is determined based on the working state value of each high-voltage electrical device and a preset value-state data table.

[0044] According to the method for monitoring and evaluating the status of high-voltage electrical equipment in a primary power system provided by the present invention,

[0045] Working status, including: normal status, attention status and warning status;

[0046] Abnormal status, including: attention status and warning status.

[0047] According to the method for monitoring and evaluating the status of high-voltage electrical equipment in a primary power system provided by the present invention, the early warning signal includes: attention warning, warning warning and severe warning warning.

[0048] Compared with the prior art, the present invention has the following beneficial effects:

[0049] By deploying sensor arrays in key locations and environments of high-voltage electrical equipment, collecting equipment and environmental data in real time, and automatically analyzing equipment status, more efficient and accurate abnormal monitoring is achieved, which greatly improves the real-time and comprehensive nature of monitoring. Potential faults can be discovered in a timely manner and early warnings can be triggered, thereby optimizing maintenance strategies, reducing the risk of equipment failures, and improving the stability and safety of the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0051] Figure 1 It is a flow chart of a method for monitoring and evaluating the status of high-voltage electrical equipment in a primary power system provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0052] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are 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.

[0053] Example 1

[0054] The embodiment of the present invention provides a method for monitoring and evaluating the status of high-voltage electrical equipment in a primary power system, such as Figure 1 As shown, including:

[0055] Step 1: Obtain key parts of high-voltage electrical equipment and key locations of the working environment of high-voltage electrical equipment, and deploy corresponding sensor arrays at the key parts and key locations;

[0056] Step 2: monitoring and collecting the working data of the electrical equipment and the environmental data of the working environment of the electrical equipment based on the corresponding sensor array;

[0057] Step 3: Determine the working state of the high-voltage electrical equipment based on the collected working data of the electrical equipment and the environmental data of the working environment of the electrical equipment;

[0058] Step 4: If the working state of the high-voltage electrical equipment is in an abnormal state, a corresponding early warning signal is triggered;

[0059] Step 5: Determine the maintenance plan based on the early warning signal and perform maintenance on the high-voltage electrical equipment.

[0060] In this embodiment, the key parts of high-voltage electrical equipment refer to parts that are crucial to the operation of the equipment, and the status of these parts has an important impact on the overall operation and safety of the equipment. For example, the winding and core parts of the transformer are prone to overheating and partial discharge. The contact points and operating mechanisms of the circuit breaker, if severely worn, will affect the reliability of the switch opening and closing. The cable joints, the cable heads are the key areas of the high-voltage cable connection points, which are easily affected by temperature and humidity to produce breakdown failures. The key positions of the working environment of high-voltage electrical equipment refer to the key areas in the external environment that affect the operation of the equipment and have a direct or indirect impact on the status of the equipment. For example, the temperature, humidity and air quality near the high-voltage switch cabinet, these factors may cause aging or corrosion of the insulation of the internal components. The main control room and outdoor equipment area in the substation, the rain, dust, temperature changes and other factors in the outdoor environment have a greater impact on the equipment. The humidity and water level of the cable trench, if water accumulates, it is easy to cause the cable to be damaged by moisture;

[0061] In this embodiment, the sensor array refers to a group of sensors deployed in key parts and key positions, which work together to comprehensively monitor the status of the equipment, for example: temperature sensor, humidity sensor: used to monitor the temperature of the equipment and the ambient humidity to prevent failures caused by overheating and excessive humidity, vibration sensor: detects equipment vibration to help identify mechanical looseness or abnormal vibration, partial discharge sensor: monitors the electrical discharge activity of the equipment to detect potential insulation problems, gas sensor: used to detect the composition and content of gas in the transformer oil to help determine whether there is discharge or overheating.

[0062] In this embodiment, the working data refers to the operating status data collected from the key parts of the high-voltage electrical equipment, which is used to determine the normal or abnormal status of the equipment. For example, current and voltage: monitor the load condition to determine whether the equipment is overloaded, temperature: check the temperature change of the equipment to prevent overheating and cause equipment failure, partial discharge data: if there is a partial discharge phenomenon, it may indicate that the insulation material is aging or the equipment is damaged;

[0063] In this embodiment, environmental data refers to data collected from key locations in the working environment of the equipment, which is used to determine the impact of the environment on the operation of the equipment. For example, temperature and humidity: changes in environmental temperature and humidity may affect the insulation performance of the equipment, air quality: dust, corrosive gases, etc. may affect the health of the outer surface and interior of the equipment, and vibration data: environmental vibration may cause damage to mechanical equipment.

[0064] In this embodiment, the maintenance plan refers to an equipment maintenance plan determined based on early warning signals when the equipment is in an abnormal state to restore the equipment to a normal working state. For example, if the equipment is overheated, the maintenance plan may include cooling the equipment or replacing faulty parts. After electrical discharge is detected, the plan may include replacing insulating materials or re-fixing loose parts. When the humidity is too high, the plan may include installing moisture-proof facilities or performing sealing maintenance to avoid moisture intrusion.

[0065] The beneficial effects of the above technical solution are: by arranging sensor arrays in key parts and environments of high-voltage electrical equipment, collecting equipment and environmental data in real time, and automatically analyzing equipment status, more efficient and accurate abnormal monitoring is achieved, which greatly improves the real-time and comprehensiveness of monitoring, and can promptly detect potential faults and trigger early warnings, thereby optimizing maintenance strategies, reducing the risk of equipment failures, and improving the stability and safety of the power system.

[0066] Example 2

[0067] The embodiment of the present invention provides a method for monitoring and evaluating the state of high-voltage electrical equipment in a primary power system, obtaining key parts of the high-voltage electrical equipment and key positions of the working environment of the high-voltage electrical equipment, and deploying corresponding sensor arrays at the key parts and key positions, including:

[0068] Analyze the structure of high-voltage electrical equipment and determine the key parts of each high-voltage electrical equipment;

[0069] Survey the working environment of high-voltage electrical equipment based on preset survey equipment to obtain environmental data of the working environment of high-voltage electrical equipment;

[0070] Analyze environmental data to determine key locations for the working environment of high-voltage electrical equipment;

[0071] Determine the type of key parameters to be monitored based on the key parts of the high-voltage electrical equipment and the key locations of the working environment;

[0072] Based on the type of key parameters, the sensors to be deployed at the key parts of each high-voltage electrical equipment and the key positions of each working environment are determined, thereby forming a sensor array for each key part of each high-voltage electrical equipment and each key position of the working environment.

[0073] In this embodiment, the structure of high-voltage electrical equipment refers to the internal and external components of the high-voltage electrical equipment, including its main functional components and the connection relationship between the components. Structural analysis helps to determine the key parts of the equipment. For example, the structure of the transformer includes windings, cores, oil tanks, radiators and other components. The electrical and thermal relationships between the various parts are crucial to the performance of the equipment. The structure of the circuit breaker includes arc extinguishing chambers, operating mechanisms, contact systems, spring mechanisms and other components. Among them, the contacts and arc extinguishing chambers are the key parts of the fault. The structure of the disconnector is mainly composed of conductive parts, insulating parts and operating mechanisms. The contact points of the conductive parts are important monitoring objects.

[0074] In this embodiment, the preset survey equipment refers to a portable or fixed device used to detect and evaluate the parameters of the environment around the equipment, to help obtain data on the operating environment of high-voltage electrical equipment, and is usually used to determine key locations and environmental influencing factors. For example, a temperature and humidity survey meter is used to measure the temperature and humidity of the environment around the equipment to help determine whether the environment will affect the insulation performance of the equipment. A vibration tester monitors the vibration conditions in the working environment of the equipment. If there is a mechanical vibration source near the installation location, it may have an adverse effect on the operation of the equipment. An air quality monitor measures the dust and corrosive gas components in the air to evaluate the corrosiveness of the equipment operating environment and help determine whether additional protective measures are needed.

[0075] In this embodiment, the type of key parameters refers to the type of key data used to monitor high-voltage electrical equipment and its working environment. The selection of these parameters is based on the structural characteristics of the equipment and the environmental conditions to ensure that the equipment status and environmental impact can be accurately judged. For example, temperature parameters: used to monitor the risk of overheating of the equipment, especially suitable for the contact points of transformer windings and switch cabinets, current and voltage: used to monitor the load conditions and electrical performance of the equipment, such as the current load status of the circuit breaker, partial discharge parameters: used to judge the health of the insulation material, suitable for transformers, switch cabinets and other equipment with high insulation requirements, humidity and air quality parameters: used to monitor the humidity and pollutants in the environment around the equipment, especially suitable for outdoor equipment and insulation materials that are sensitive to the environment, vibration parameters: suitable for monitoring the mechanical impact of the environment where the equipment is located, suitable for areas with mechanical activities in substations, to prevent vibration from causing loosening and damage to the equipment.

[0076] The beneficial effects of the above technical solution are: by accurately deploying sensor arrays at key parts of equipment and key locations in the environment, targeted monitoring layout is achieved, key parameters are screened based on structural analysis and environmental data, and the high value and effectiveness of monitoring data are ensured. It optimizes sensor resource allocation, makes condition monitoring more accurate and efficient, and improves the timeliness of fault warnings and the reliability of equipment operation.

[0077] Example 3

[0078] The embodiment of the present invention provides a method for monitoring and evaluating the status of high-voltage electrical equipment in a primary power system, analyzing the structure of the high-voltage electrical equipment and determining the key parts of each high-voltage electrical equipment, including:

[0079] Consult the technical manual of the preset high-voltage electrical equipment to obtain the structure of each high-voltage electrical equipment and the functional parameters of each component;

[0080] Performing a first decomposition on the structure of each high-voltage electrical device based on the functional parameters of each component to obtain a plurality of first functional components of each high-voltage electrical device;

[0081] Performing a first analysis on all first functional components of each high-voltage electrical device, determining an initial risk level of each first functional component, and determining a first functional component having an initial risk level greater than a preset risk level as a second functional component;

[0082] Obtaining historical operation data of each high-voltage electrical device, thereby determining the historical failure frequency of the second functional component of each high-voltage electrical device, and determining the second functional component whose historical failure frequency is less than a preset failure frequency as the third functional component;

[0083] All third functional components of each high-voltage electrical equipment are identified as key parts.

[0084] In this embodiment, the functional parameters of each component refer to the key performance indicators of each component in the high-voltage electrical equipment, which are used to describe the characteristics and operating requirements of the component. Through these parameters, it is possible to evaluate whether the component meets the functional requirements and safety standards of the equipment. For example: the upper temperature limit of the transformer winding, as a functional parameter of the winding, exceeding this temperature may damage the insulation material, the rated current of the circuit breaker, that is, the maximum current that the circuit breaker can carry when operating normally, and the number of operations of the disconnector, which is used to characterize the life of the disconnector. Normal operation within this range of times can ensure the safety of the equipment.

[0085] In this embodiment, the first decomposition is a preliminary decomposition of the high-voltage electrical equipment structure, the purpose of which is to split the complex equipment into functional units or modules that are easy to analyze;

[0086] In this embodiment, the first functional components refer to basic components of the equipment obtained after the first decomposition, and these components can perform specific functions independently. For example, the transformer is first decomposed to obtain first functional components such as windings, cores, oil tanks, and radiators, and the circuit breaker is first decomposed to obtain first functional components such as arc extinguishing chambers, contacts, operating mechanisms, and spring mechanisms.

[0087] In this embodiment, the first analysis is a preliminary assessment of each first functional component to determine its possible failure risk. By analyzing the design parameters and working environment of the equipment, an "initial risk level" is assigned to represent the potential failure risk of the component. The risk level is usually scored or classified according to the historical data and key functions of the equipment. For example, among the functional components of the transformer, the winding may have a higher initial risk level because it carries current, generates severe heat, and is difficult to maintain. The contact components of the circuit breaker often break current and are prone to wear, so the initial risk level may also be higher. The initial risk level of the radiator may be relatively low because it is less directly involved in electrical functions.

[0088] In this embodiment, the second functional component refers to the first functional component whose initial risk level is greater than the preset risk level, that is, the component marked as high risk after the first analysis, which is subjected to greater stress in the equipment or may be more prone to failure due to frequent use. For example: in a transformer, if the initial risk level of the winding and the core is higher than the set risk threshold, they are marked as the second functional component, and the contacts and arc extinguishing chambers in the circuit breaker are usually designated as the second functional component because they are frequently operated and may face greater electrical stress.

[0089] In this embodiment, the third functional component refers to a component in the second functional component whose historical failure frequency is lower than the preset failure frequency, which means that the frequency of failure of these components in actual use is relatively low, but they are still key parts of the equipment. The third functional component is usually higher risk in the initial analysis, but there are not many actual failures, so it needs to be monitored continuously. For example: for the transformer winding, although it has a higher risk, if the historical data shows that its failure frequency is lower than a certain set value, it will be determined as the third functional component. For the operating mechanism in the circuit breaker, if its historical failure frequency is lower than the preset value, it can still be regarded as the third functional component despite the higher risk level.

[0090] The beneficial effect of the above technical solution is: by combining the structural decomposition and functional parameter analysis of high-voltage electrical equipment with historical fault data, key parts can be accurately identified through multi-layer screening. This method gradually focuses on high-risk components to achieve optimal resource allocation, make monitoring and maintenance more targeted, improve the accuracy of fault prediction, and enhance the safety and reliability of equipment operation.

[0091] Example 4

[0092] The embodiment of the present invention provides a method for monitoring and evaluating the state of high-voltage electrical equipment in a primary power system, which monitors and collects working data of the electrical equipment and environmental data of the working environment of the electrical equipment based on a corresponding sensor array, including:

[0093] Determine the monitoring priority of each key part based on the initial risk level and historical failure frequency of each third functional component of each high-voltage electrical equipment;

[0094] Determine the monitoring frequency of each key part based on the monitoring priority of each key part and the preset priority-frequency data table;

[0095] Determine the monitoring priority of each sensor in the sensor array at each key position of the working environment based on the sensor type and the preset sensor type-priority data table, and then determine the monitoring priority of each sensor array;

[0096] Determine the monitoring frequency of each key position in the working environment based on the monitoring priority of each key position in the working environment and a preset priority-frequency data table;

[0097] Based on the monitoring frequency of each key part, the monitoring frequency of each key position of the working environment and the corresponding sensor array, the working data of the electrical equipment and the environmental data of the working environment of the electrical equipment are monitored and collected.

[0098] In this embodiment, the monitoring priority refers to the level of attention assigned to each key part or sensor array in the equipment status monitoring. The monitoring priority is based on factors such as the initial risk level of the equipment components and the historical failure frequency, and represents the relative importance of each key part or environmental key position when monitoring. The higher the priority, the more frequent and stricter monitoring is required to detect potential problems in a timely manner. For example: For the winding of a transformer, if its initial risk level is high and the historical failure frequency is high, the monitoring priority of the winding will be set to the highest, because once the winding fails, it will affect the overall performance of the equipment. The contacts of the circuit breaker may be set with a higher monitoring priority due to frequent current carrying and more wear to ensure that contact wear or failure can be detected in time.

[0099] In this embodiment, the preset priority-frequency data table is a predefined data table for mapping monitoring priorities to specific monitoring frequencies, that is, automatically generating appropriate monitoring frequency settings according to different priorities to ensure that high-priority components are monitored more frequently. The priority-frequency data table is usually determined by empirical data or analysis. For example, the table may contain the following entries: Priority 1 (highest): monitor every 5 minutes, Priority 2: monitor every 30 minutes, Priority 3: monitor every 2 hours, Priority 4 (lowest): monitor once a day. For transformer windings, if it is set to priority 1, the system will be set to monitor every 5 minutes according to the priority-frequency data table to ensure that abnormal conditions can be discovered as early as possible;

[0100] In this embodiment, the monitoring frequency refers to the time interval for data collection for each key part, key position and its sensor. According to the monitoring priority, the monitoring frequency is determined by a preset priority-frequency data table. The higher the frequency, the more frequent the data collection, so that the equipment status can be grasped in real time. For example: if the monitoring priority of the transformer winding is 1, the monitoring frequency is set to once every 5 minutes, and the system will collect working data such as winding temperature and partial discharge data every 5 minutes. If the monitoring priority of the disconnector is lower, it may be set to priority 3, then the monitoring frequency may be once every 2 hours, and such a monitoring frequency is sufficient to cope with regular environmental changes without generating too much data redundancy. The monitoring frequency of key locations in the environment (such as humidity monitoring in outdoor transformer areas) may also be set to once a day based on the priority, which is sufficient to monitor the impact of external humidity on the equipment.

[0101] The beneficial effects of the above technical solution are: through the sensor array and multi-dimensional priority system, monitoring resources are intelligently allocated, so that the monitoring frequency of key parts and environmental locations accurately matches the risk level, and dynamic adjustment based on initial risk and failure frequency optimizes monitoring accuracy and efficiency, avoids waste of resources, ensures early abnormality detection of equipment, and improves the overall stability and reliability of the system.

[0102] Example 5

[0103] The embodiment of the present invention provides a method for monitoring and evaluating the status of high-voltage electrical equipment in a primary power system, which determines the working status of the high-voltage electrical equipment based on the collected working data of the electrical equipment and the environmental data of the working environment of the electrical equipment, including:

[0104] Analyze the collected working data of the electrical equipment and the environmental data of the working environment of the electrical equipment to determine several key parameter values ​​of the high-voltage electrical equipment;

[0105] The health index of each key parameter of each high-voltage electrical equipment is determined based on several key parameter values ​​of each high-voltage electrical equipment:

[0106]

[0107] Among them, HI ij is the health index of the jth key parameter of the ith high-voltage electrical equipment, H ij is the value of the jth key parameter of the ith high-voltage electrical equipment, is the preset maximum value of the jth key parameter of the ith high-voltage electrical equipment, is the preset critical value of the jth key parameter of the i-th high-voltage electrical equipment, and α ij is the influence coefficient of the preset slight excess of the jth key parameter of the i-th high-voltage electrical equipment, and α ij ∈(0.1,0.3),γ ij is the preset serious exceeding influence coefficient of the jth key parameter of the i-th high-voltage electrical equipment, and γ ij ∈(0.3,0.7);

[0108] The comprehensive health index of each high-voltage electrical equipment is determined based on the health index of all key parameters of each high-voltage electrical equipment:

[0109]

[0110] Among them, U i is the comprehensive health index of the i-th high-voltage electrical equipment, w0 ij is the preset basic weight of the health index of the jth key parameter of the i-th high-voltage electrical equipment, β ij is the preset adjustment coefficient of the health index of the jth key parameter of the i-th high-voltage electrical equipment, is the preset reference value of the health index of the jth key parameter of the i-th high-voltage electrical equipment, is the preset critical value of the health index of the jth key parameter of the i-th high-voltage electrical equipment, μ i is the preset penalty coefficient of the i-th high-voltage electrical equipment;

[0111] The working status of each high-voltage electrical equipment is determined based on all key parameters and comprehensive health index of each high-voltage electrical equipment.

[0112] In this embodiment, the health index of the key parameter is an indicator calculated based on the specific parameter value relative to its preset normal range, which is used to indicate the health of the parameter. The higher the index, the healthier the operating status of the equipment under the parameter; the lower the index, the parameter may be abnormal. For example: the temperature of the transformer winding is a key parameter. Assuming that its health index is calculated to be 0.9 (90%), it means that the winding temperature is relatively normal, but there is a certain slight exceeding of the standard. The contact resistance of the circuit breaker is also a key parameter. If the health index is lower than 0.7, it may indicate that the contact point is severely worn and attention should be paid to the health status of the component;

[0113] In this embodiment, the preset critical value is the maximum allowable value of each key parameter during safe operation. Exceeding this value indicates that the parameter has entered an abnormal range, which may affect the normal operation of the equipment. For example, the preset critical value of the transformer winding temperature is 90°C. When the winding temperature exceeds this value, it will affect the life of the equipment and the insulation material. The preset critical value of the contact resistance of the circuit breaker contact is 0.5 milliohms. Exceeding this value may mean that the contact is poor, affecting the reliability of opening and closing.

[0114] In this embodiment, the preset influence coefficient of slight exceeding the standard is a coefficient used to adjust the degree of influence of the parameter on the health index when it slightly exceeds the normal range in the calculation of the health index of the key parameter. The influence coefficient of slight exceeding the standard ensures that even if the parameter value slightly exceeds the standard, the impact on the health index will not be too large. For example: for the transformer winding temperature, the influence coefficient of slight exceeding the standard can be set to 0.8, which means that if the winding temperature slightly exceeds the safety value, the health index will drop slightly, but the impact will not be very serious. For air humidity, the influence coefficient of slight exceeding the standard may be set to 0.9, indicating that the slight exceeding of humidity has little impact on the equipment, and the equipment health index will drop only slightly.

[0115] In this embodiment, the preset serious exceeding influence coefficient has a significant impact on the health index when the key parameter seriously exceeds the preset critical value. This coefficient is low, which means that once it seriously exceeds the standard, the health index will drop sharply, emphasizing the safety hazard. For example: the serious exceeding influence coefficient of transformer winding temperature may be 0.3. If the temperature exceeds the critical value significantly, the health index will drop significantly, indicating a serious risk. For the contact resistance of the circuit breaker, the serious exceeding influence coefficient is 0.5. If the resistance far exceeds the standard value, the health index will drop rapidly, indicating that the contact is seriously aged or worn.

[0116] In this embodiment, the comprehensive health index is an overall health value obtained by weighted average of the health indexes of key parameters of the equipment, and is used to characterize the overall operating status and health of the equipment. The higher the comprehensive health index, the healthier the overall operation of the equipment; the lower the comprehensive health index, the potential faults or problems of the equipment may exist. For example: the health indexes of key parameters of the transformer, such as winding temperature, current, voltage, etc., are 0.9, 0.8, and 0.85 respectively. The comprehensive health index may be calculated to be 0.85, indicating that the overall operation of the equipment is normal. If the comprehensive health index of the circuit breaker is lower than 0.6, it indicates that the equipment may have multiple parameter problems and requires immediate inspection and maintenance;

[0117] In this embodiment, the preset reference value is the key parameter value of the device under ideal operating conditions, which serves as a standard reference point for calculating the health index. The degree of deviation from the reference value can help determine the degree of deviation of the device. For example, the reference value for the transformer winding temperature can be set to 60°C, which is the ideal temperature for the device under normal load. If the temperature is close to this value, it indicates that the device is in a healthy state. The reference value for air humidity is set to 30%, indicating that the device environment is relatively stable at this humidity. Exceeding this value means that environmental conditions may have a negative impact on the device.

[0118] The beneficial effect of the above technical solution is that it comprehensively evaluates the equipment status through a multi-dimensional health index system by combining equipment working data and environmental data, and dynamically and accurately reflects the equipment health status through differentiated coefficients, weight adjustments and penalty mechanisms for slight and serious excesses, making fault prediction more sensitive, effectively avoiding the accumulation and sudden occurrence of potential faults, and improving system stability and operation and maintenance efficiency.

[0119] Example 6

[0120] The embodiment of the present invention provides a method for monitoring and evaluating the status of high-voltage electrical equipment in a primary power system, which determines the working status of each high-voltage electrical equipment based on all key parameter values ​​and a comprehensive health index of each high-voltage electrical equipment, including:

[0121] Determine the working status value of each high-voltage electrical equipment based on all key parameter values ​​and comprehensive health index of each high-voltage electrical equipment:

[0122]

[0123] Among them, SI i is the working state value of the i-th high-voltage electrical equipment, w1 i is the preset weight of the comprehensive health index of the i-th high-voltage electrical equipment, w2 i is the preset weight of the key parameters of the i-th high-voltage electrical equipment, w1 ij is the preset weight of the jth key parameter of the ith high-voltage electrical equipment, U1i is the preset maximum value of the comprehensive health index of the i-th high-voltage electrical equipment;

[0124] The working state of each high-voltage electrical device is determined based on the working state value of each high-voltage electrical device and a preset value-state data table.

[0125] In this embodiment, the working status value is a quantitative indicator used to characterize the current operating status of the high-voltage electrical equipment. It is obtained by weighted calculation of the comprehensive health index of the equipment and each key parameter. Specifically, the working status value combines the preset weight of the comprehensive health index of the equipment, the weight of the key parameters, and the weight of each key parameter to reflect the overall health status of the equipment over a period of time. The status value is used to determine whether the equipment is operating normally, whether maintenance is required or there is a potential risk of failure. According to the preset value-status data table, the working status value can be converted into a specific equipment operating status category, such as "normal", "warning" or "caution".

[0126] The beneficial effects of the above technical solution are: by introducing a comprehensive health index and multiple weight allocations, each key parameter is organically combined with the equipment health status, generating detailed working status values, accurately quantifying the equipment operation health status, efficiently identifying abnormal trends based on data tables, customizing risk monitoring solutions for each device, improving fault prediction capabilities, achieving efficient and accurate status management, and extending equipment life.

[0127] Example 7

[0128] The embodiment of the present invention provides a method for monitoring and evaluating the status of high-voltage electrical equipment in a primary power system.

[0129] Working status, including: normal status, attention status and warning status;

[0130] Abnormal status, including: attention status and warning status.

[0131] In this embodiment, the working status is as follows: normal status: the equipment operates normally within the expected range, without any abnormal signs, and the parameter indicators are within the safe range; attention status: although the equipment is running, some preliminary abnormal signs appear, which require attention and may indicate future failure risks; warning status: the equipment operating parameters are close to dangerous values ​​or have abnormal fluctuations. Although no failure has occurred, the failure risk has increased significantly and needs to be handled in a timely manner.

[0132] In this embodiment, the abnormal status is as follows: Attention status: the equipment operating parameters exceed the normal safety range but have not reached a serious level. The equipment has a small range of losses or abnormal changes, and continuous tracking and preventive maintenance measures are required. Warning status: the equipment parameters reach or are close to the failure standard, the equipment operation is in an extremely unstable state, and the risk of failure is extremely high. It is necessary to shut down and repair immediately to avoid the expansion of the failure.

[0133] In this embodiment, the working state is as follows: normal state: the temperature is stable below 85°C, the voltage fluctuation is within the range of ±5% of the rated voltage, and the vibration amplitude is small; attention state: the transformer temperature rises to 90°C, the voltage fluctuation is within the range of ±7%, and the vibration increases slightly, indicating that the transformer load is close to the upper limit or the ambient temperature is too high; warning state: the transformer temperature rises to 95°C, the voltage fluctuation is within the range of ±10%, and the vibration amplitude increases significantly. At this time, cooling measures or load transfer and other intervention measures should be taken as soon as possible; abnormal state (attention state): the transformer temperature continues to rise to 100°C, the voltage fluctuation reaches ±12%, the vibration is unstable, and it is necessary to track and arrange regular inspections; abnormal state (warning state): the temperature exceeds 110°C, the voltage fluctuation exceeds ±15%, the vibration is violent, the equipment may fail at any time, and it is necessary to stop immediately for a comprehensive inspection.

[0134] The beneficial effect of the above technical solution is: by subdividing the equipment status level, the operating status of high-voltage electrical equipment from normal to fault can be accurately quantified. By providing "attention" and "warning" signals before an abnormality occurs, the system realizes the ability to predict risks, allowing operation and maintenance personnel to intervene in time before small problems turn into major failures, improving equipment reliability and system safety, and reducing unplanned downtime and maintenance costs.

[0135] Example 8

[0136] The embodiment of the present invention provides a method for monitoring and evaluating the status of high-voltage electrical equipment in a primary power system, and early warning signals include: attention warning, warning warning and severe warning warning.

[0137] In this embodiment, attention warning: when the operating parameters of the equipment are monitored to be slightly abnormal, exceeding the normal range but not reaching the serious standard, the system issues a "attention warning". Such warnings are mostly minor abnormalities, prompting the operation and maintenance personnel that there may be minor problems with the equipment, but they do not need to be dealt with immediately. Normally, attention warnings only need to be recorded and continuously monitored. For example, when the temperature of the transformer is slightly higher than the normal value but not exceeding the standard, the system can issue a attention warning;

[0138] In this embodiment, warning alerts: When the operating parameters of the equipment deviate from the normal values ​​by a large margin and show moderate abnormalities, the system will issue a "warning alert". At this point, the equipment has shown obvious abnormal signals, prompting the operation and maintenance personnel to pay attention in time and check the equipment status as soon as possible. Warning alerts usually require the operation and maintenance personnel to conduct inspections in a short period of time to prevent the situation from deteriorating. For example, if the current value of the circuit breaker is close to the upper limit of the rated value and fluctuates, the system can issue a warning alert;

[0139] In this embodiment, severe warning: when the operating parameters of the equipment have seriously deviated from the normal value and there is an extremely high risk of failure, the system will issue a "severe warning". This type of warning indicates that the equipment may be about to fail and emergency measures must be taken immediately, or even the equipment must be shut down for maintenance to avoid greater losses. For example, when the bus voltage exceeds the safety threshold or the temperature approaches the extreme tolerance range of the equipment, the system will issue a severe warning to prompt the operation and maintenance personnel to deal with it quickly.

[0140] The beneficial effect of the above technical solution is that the potential faults of high-voltage electrical equipment are gradually quantified through a hierarchical early warning signal system, with prompts from minor abnormalities to serious faults. This method helps operation and maintenance personnel to pay attention to the equipment status when the risk of fault first appears, take maintenance measures in a timely manner, and avoid sudden downtime. It effectively extends the life of equipment, reduces maintenance costs, and improves the reliability and safety of system operation, realizing the transformation from passive repair to active protection.

[0141] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0142] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0143] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for monitoring and evaluating the condition of high-voltage electrical equipment in a primary power system, characterized in that: include: Step 1: Obtain key parts of high-voltage electrical equipment and key locations of the working environment of high-voltage electrical equipment, and deploy corresponding sensor arrays at the key parts and key locations; Step 2: monitoring and collecting the working data of the electrical equipment and the environmental data of the working environment of the electrical equipment based on the corresponding sensor array; Step 3: Determine the working state of the high-voltage electrical equipment based on the collected working data of the electrical equipment and the environmental data of the working environment of the electrical equipment; Step 4: If the working state of the high-voltage electrical equipment is in an abnormal state, a corresponding early warning signal is triggered; Step 5: Determine the maintenance plan based on the early warning signal and perform maintenance on the high-voltage electrical equipment.

2. The method for monitoring and evaluating the status of high-voltage electrical equipment in a primary power system according to claim 1, characterized in that: Obtain the key parts of high-voltage electrical equipment and the key locations of the working environment of high-voltage electrical equipment, and deploy corresponding sensor arrays at the key parts and key locations, including: Analyze the structure of high-voltage electrical equipment and determine the key parts of each high-voltage electrical equipment; Survey the working environment of high-voltage electrical equipment based on preset survey equipment to obtain environmental data of the working environment of high-voltage electrical equipment; Analyze environmental data to determine key locations for the working environment of high-voltage electrical equipment; Determine the type of key parameters to be monitored based on the key parts of the high-voltage electrical equipment and the key locations of the working environment; Based on the type of key parameters, the sensors to be deployed at the key parts of each high-voltage electrical equipment and the key positions of each working environment are determined, thereby forming a sensor array for each key part of each high-voltage electrical equipment and each key position of the working environment.

3. The method for monitoring and evaluating the condition of high-voltage electrical equipment in a primary power system according to claim 2, characterized in that: Analyze the structure of high-voltage electrical equipment and determine the key parts of each high-voltage electrical equipment, including: Consult the technical manual of the preset high-voltage electrical equipment to obtain the structure of each high-voltage electrical equipment and the functional parameters of each component; Performing a first decomposition on the structure of each high-voltage electrical device based on the functional parameters of each component to obtain a plurality of first functional components of each high-voltage electrical device; Performing a first analysis on all first functional components of each high-voltage electrical device, determining an initial risk level of each first functional component, and determining a first functional component having an initial risk level greater than a preset risk level as a second functional component; Obtaining historical operation data of each high-voltage electrical device, thereby determining the historical failure frequency of the second functional component of each high-voltage electrical device, and determining the second functional component whose historical failure frequency is less than a preset failure frequency as the third functional component; All third functional components of each high-voltage electrical equipment are identified as key parts.

4. The method for monitoring and evaluating the state of high-voltage electrical equipment in a primary power system according to claim 3, characterized in that: Based on the corresponding sensor array, the working data of the electrical equipment and the environmental data of the working environment of the electrical equipment are monitored and collected, including: Determine the monitoring priority of each key part based on the initial risk level and historical failure frequency of each third functional component of each high-voltage electrical equipment; Determine the monitoring frequency of each key part based on the monitoring priority of each key part and the preset priority-frequency data table; Determine the monitoring priority of each sensor in the sensor array at each key position of the working environment based on the sensor type and the preset sensor type-priority data table, and then determine the monitoring priority of each sensor array; Determine the monitoring frequency of each key position in the working environment based on the monitoring priority of each key position in the working environment and a preset priority-frequency data table; Based on the monitoring frequency of each key part, the monitoring frequency of each key position of the working environment and the corresponding sensor array, the working data of the electrical equipment and the environmental data of the working environment of the electrical equipment are monitored and collected.

5. The method for monitoring and evaluating the condition of high-voltage electrical equipment in a primary power system according to claim 1, characterized in that: The working state of the high-voltage electrical equipment is determined based on the collected working data of the electrical equipment and the environmental data of the working environment of the electrical equipment, including: Analyze the collected working data of the electrical equipment and the environmental data of the working environment of the electrical equipment to determine several key parameter values ​​of the high-voltage electrical equipment; The health index of each key parameter of each high-voltage electrical equipment is determined based on several key parameter values ​​of each high-voltage electrical equipment: Among them, HI ij is the health index of the jth key parameter of the ith high-voltage electrical equipment, H ij is the value of the jth key parameter of the ith high-voltage electrical equipment, H maxij is the preset maximum value of the jth key parameter of the i-th high-voltage electrical equipment, is the preset critical value of the jth key parameter of the i-th high-voltage electrical equipment, and α ij is the influence coefficient of the preset slight excess of the i-th key parameter of the i-th high-voltage electrical equipment, and α ij ∈(0.1, 0.3), γ ij is the preset serious exceeding influence coefficient of the jth key parameter of the i-th high-voltage electrical equipment, and γ ij ∈(0.3, 0.7); The comprehensive health index of each high-voltage electrical equipment is determined based on the health index of all key parameters of each high-voltage electrical equipment: Among them, U i is the comprehensive health index of the i-th high-voltage electrical equipment, w0 ij is the preset basic weight of the health index of the jth key parameter of the i-th high-voltage electrical equipment, β ij is the preset adjustment coefficient of the health index of the i-th key parameter of the i-th high-voltage electrical equipment, is the preset reference value of the health index of the jth key parameter of the i-th high-voltage electrical equipment, is the preset critical value of the health index of the ith key parameter of the ith high-voltage electrical equipment, μ i is the preset penalty coefficient of the i-th high-voltage electrical equipment; The working status of each high-voltage electrical equipment is determined based on all key parameters and comprehensive health index of each high-voltage electrical equipment.

6. The method for monitoring and evaluating the condition of high-voltage electrical equipment in a primary power system according to claim 5, characterized in that: Determine the working status of each high-voltage electrical equipment based on all key parameter values ​​and comprehensive health index of each high-voltage electrical equipment, including: Determine the working status value of each high-voltage electrical equipment based on all key parameter values ​​and comprehensive health index of each high-voltage electrical equipment: Among them, SI j is the working state value of the i-th high-voltage electrical equipment, w1 i is the preset weight of the comprehensive health index of the i-th high-voltage electrical equipment, w2 i is the preset weight of the key parameters of the i-th high-voltage electrical equipment, w1 ij is the preset weight of the jth key parameter of the ith high-voltage electrical equipment, U1 j is the preset maximum value of the comprehensive health index of the i-th high-voltage electrical equipment; The working state of each high-voltage electrical device is determined based on the working state value of each high-voltage electrical device and a preset value-state data table.

7. The method for monitoring and evaluating the status of high-voltage electrical equipment in a primary power system according to claim 1, characterized in that: Working status, including: normal status, attention status and warning status; Abnormal status, including: attention status and warning status.

8. The method for monitoring and evaluating the condition of high-voltage electrical equipment in a primary power system according to claim 1, characterized in that: Early warning signals include: attention warning, warning warning and severe warning warning.

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