A real-time monitoring module and method for ring main unit based on digital intelligent perception

Abstract

The present invention belongs to the technical field of partial discharge monitoring of ring network cabinets, and specifically discloses a real-time monitoring module for ring network cabinets based on digital intelligent perception and a method thereof, comprising: evaluating the hidden danger gain of each contact position of the ring network cabinet by real-time detection of structural damage parameters of each contact position of the ring network cabinet in a normal state cycle; evaluating the degree of partial discharge superposition of each contact position of the ring network cabinet by identifying the corresponding discharge type of each partial discharge at each contact position of the ring network cabinet in a normal state cycle; determining the coupling effect index of environmental changes on the electrical parameters of each contact position of the ring network cabinet by real-time monitoring of electrical parameters and partial discharge conditions at each contact position of the ring network cabinet in combination with changes in meteorological characteristics; identifying the partial discharge coefficient of each contact position of the ring network cabinet, and performing graded processing on the partial discharge characteristics of each contact position of the ring network cabinet through periodic regulation, and quickly determining the specific location of the discharge fault.

Description

Technical Field

[0001] The invention belongs to the technical field of partial discharge monitoring of ring main units, and relates to a real-time monitoring module of a ring main unit based on digital intelligent perception and a method thereof. Background Art

[0002] In the power system, the ring main unit, as an important power distribution equipment, undertakes the key tasks of opening, closing and controlling the current. With the increasing complexity of the power system, the reliability and stability of the ring main unit have become important factors in ensuring the safe operation of the power grid. However, during the operation of the ring main unit, partial discharge often occurs due to reasons such as excessive local electric field strength, dielectric damage, foreign matter entry or improper operation. This partial discharge not only causes equipment damage, but also poses a serious threat to the normal operation of the power system, and even causes power outages and economic losses. Therefore, it is particularly important to develop an efficient and accurate solution for partial discharge fault detection in ring main units.

[0003] In the prior art, there are also some related solutions related to partial discharge fault detection of ring main unit. For example, Chinese Patent Publication No. CN113866574A discloses a ring main unit fault detection system, which includes a partial discharge monitoring system, a temperature measurement system, and a fault analysis system; the partial discharge monitoring system includes a partial discharge monitoring device and a partial discharge information collection device, the temperature measurement system includes a temperature sensor and a temperature collection device, the partial discharge monitoring device is connected to the partial discharge information collection device, the temperature sensor is connected to the temperature collection device, and the partial discharge information collection device and the temperature collection device are respectively communicated with the fault analysis system.

[0004] Although the above scheme proposes some solutions for detecting partial discharge faults in ring main units, there are still the following limitations: 1. The existing technology does not combine the detailed parameters of the ring main unit structure damage to identify the type of partial discharge, which may lead to inaccurate analysis of the cause of the discharge, thereby affecting the subsequent fault handling and formulation of preventive measures.

[0005] 2. In the prior art, the fault detection cycle for partial discharge of ring main cabinets is mostly fixed, and the periodic hierarchical regulation according to the state change of the monitoring point location is not considered. Summary of the invention

[0006] In view of this, in order to solve the problems raised in the above background technology, a ring main unit real-time monitoring module and method based on digital intelligent perception are proposed.

[0007] The purpose of the present invention can be achieved through the following technical solutions: The present invention provides a real-time monitoring module for ring network cabinets based on digital intelligent perception, including: a contact structure detection module for real-time detection of structural damage parameters of each contact position of the ring network cabinet under normal state cycles through non-destructive testing technology, and evaluation of hidden danger gain of each contact position of the ring network cabinet , and number each contact point as .

[0008] The discharge data detection module is used to identify the corresponding discharge type of each partial discharge at each contact position of the ring main unit in a normal state cycle, and to identify its partial discharge intensity.

[0009] The electrical coupling analysis module is used to detect the electrical coupling coefficient and mechanical coupling coefficient of each contact position of the ring main unit within the corresponding time limit of each meteorological characteristic, and analyze the coupling effect index of the electrical parameters of each contact position of the ring main unit due to environmental changes .

[0010] The discharge fault analysis module is used to identify the partial discharge coefficient of each contact position of the ring main unit, classify the partial discharge characteristics of each contact position of the ring main unit, and determine the discharge fault position.

[0011] The second aspect of the present invention provides a real-time monitoring method for a ring main unit based on digital intelligent perception, comprising the following steps: Step 1, using non-destructive testing technology to detect in real time the structural damage parameters of each contact position of the ring main unit under a normal state cycle, and evaluating the hidden danger gain of each contact position of the ring main unit.

[0012] Step 2: Identify the corresponding discharge type of each partial discharge at each contact position of the ring main unit in a normal state cycle, and identify the partial discharge intensity.

[0013] Step 3: Detect the electrical coupling coefficient and mechanical coupling coefficient of each contact point of the ring main unit within the corresponding time limit of each meteorological characteristic, and analyze the coupling effect index of the environmental change on the electrical parameters of each contact point of the ring main unit.

[0014] Step 4: Identify the partial discharge coefficient of each contact position of the ring main unit, perform classification processing on the partial discharge characteristics of each contact position of the ring main unit, and determine the discharge fault position.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) The present invention detects the structural damage parameters of each contact position of the ring main unit in real time under the normal state cycle, evaluates the hidden danger gain of each contact position of the ring main unit, and thereby understands the structural damage state of each contact position of the ring main unit in real time, and can promptly discover minor damage or abnormal changes at the contact position, thereby issuing an early warning before a fault occurs, thereby avoiding major faults caused by small hidden dangers not being eliminated in time.

[0016] (2) The present invention identifies the structural damage parameters of each contact position of the ring main unit to identify the corresponding discharge type of each partial discharge at each contact position of the ring main unit in the normal state cycle, and evaluates the degree of partial discharge superposition at each contact position of the ring main unit on this basis, so as to timely discover the potential risks caused by structural damage. Different types of partial discharges have different degrees and mechanisms of influence on the ring main unit. Accurate identification of the discharge type helps to more accurately determine the cause and severity of the discharge.

[0017] (3) The present invention monitors the electrical parameters and partial discharge conditions of each contact point in real time, and combines the changes in meteorological characteristics to determine the coupling effect indicators of environmental changes on the electrical parameters of each contact point of the ring main unit. This can timely discover potential risks caused by environmental changes and help to formulate more accurate maintenance strategies.

[0018] (4) By identifying the local discharge coefficient of each contact position of the ring main unit, the present invention can accurately identify which contact positions have local discharge phenomena, which helps to improve the overall reliability and stability of the equipment. In the case of limited detection resources, the local discharge characteristics of each contact position of the ring main unit are graded through periodic regulation to ensure that resources are reasonably allocated. At the same time, the specific location of the discharge fault can be quickly determined, shortening the time for troubleshooting, thereby improving operation and maintenance efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the connection of the system modules of the present invention.

[0021] Figure 2 The present invention is a schematic flow chart of the steps for implementing the method. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] See also Figure 1As shown, the present invention provides a real-time monitoring module for a ring main unit based on digital intelligent perception, including: a contact structure detection module, a discharge data detection module, an electrical coupling analysis module, and a discharge fault analysis module.

[0024] The contact structure detection module is connected to the discharge data detection module, the discharge data detection module is connected to the electrical coupling analysis module, and the electrical coupling analysis module is connected to the discharge fault analysis module.

[0025] The contact structure detection module is used to detect the structural damage parameters of each contact position of the ring network cabinet in a normal state cycle in real time through non-destructive testing technology (such as X-ray detection, ultrasonic detection, etc.), and evaluate the hidden danger gain of each contact position of the ring network cabinet , and number each contact point as .

[0026] The contact points include connecting wires, connectors, and switch contacts.

[0027] In a preferred embodiment, the structural damage parameters include dent features and irregular shape features on the surface of the insulating material, and processing defect features inside the insulating material, wherein dent features such as notches and pits, irregular shape features such as edges and welds, and processing defects such as impurities and cracks.

[0028] The features of the indentations on the surface of the insulating material are specifically the depth of the indentations and the direction in which the depth spreads, the depth of the pits and the curvature of the concave sides.

[0029] The depth spreading direction of the notch refers to the direction in which the notch spreads from the shallowest scratch position to the deepest scratch position, wherein the shallowest scratch position and the deepest scratch position are identified by image grayscale detection. The specific detection principle is: the larger the image gray value, the deeper the scratch depth.

[0030] The concave side curvature value of the pit refers to the corresponding tangent value of the lateral distance and height distance between the deepest point position and the flat position of the pit.

[0031] The irregular shape features specifically include the number of edges and corners and the sharpness of each edge and corner, the opening and closing degree of the weld and the direction of its propagation.

[0032] The corners refer to the protruding structures of edges, and the sharpness of the corners refers to the protruding angles of the protruding structures of edges.

[0033] The opening degree of the weld refers to the ratio of the product of the transverse width and the longitudinal width of the weld to the preset width product reference value, and the propagation direction of the weld is the direction of the weld contour.

[0034] The processing defect characteristics inside the insulating material are specifically the impurity distribution and accumulation points and the impurity content, the depth of the crack and the depth propagation direction of the crack.

[0035] The impurity distribution concentration point refers to the position of the highest impurity content within the impurity profile range.

[0036] The depth propagation direction of the crack is the same as the depth propagation direction of the notch.

[0037] In a further preferred embodiment, the method for evaluating the hidden danger gain of each contact position of the ring network cabinet is: comparing the depth propagation direction of the surface notch of the insulating material at each contact position of the ring network cabinet with the depth propagation direction of the internal crack of the insulating material at the corresponding contact position, and identifying the inner and outer space distances corresponding to the depth propagation directions of the surface notch of the insulating material at each contact position of the ring network cabinet and the internal crack. and spatial overlap angle , analyze the overlap of damage characteristics of surface scratches and internal cracks of the insulation material at each contact point of the ring network cabinet ,in They represent the preset reference space distance and reference overlap angle respectively, and e is a natural constant. Similarly, the overlap degree of damage characteristics of the surface weld of the insulating material and the internal cracks at each joint position of the ring network cabinet is analyzed. .

[0038] Analyze the structural damage spread of the insulation material at each connection point of the ring main unit , where Indicates the ring main unit The depth of the pit on the surface of the insulating material at each contact point, Indicates the ring main unit The concave curvature value of the pit on the surface of the insulating material at each contact point, Respectively represent the preset pit reference depth and concave side reference curvature value, Indicates the ring main unit The number of edges and corners on the surface of the insulating material at each contact point, Indicates the ring main unit The surface of the insulating material at the contact point The sharpness of the edges, Indicates the ring main unit The opening and closing degree of the weld on the surface of the insulating material at each joint position, They represent the preset reference sharpness of the edges and the reference opening of the welds. Indicates the ring main unit The corresponding impurity content of the impurity distribution and accumulation points of the insulating material at each contact point, Indicates the ring main unit The depth of the crack inside the insulating material at each contact point, Respectively represent the preset impurity reference content and internal crack reference depth, They represent the proportion of structural damage corresponding to the dent features and irregular shape features on the surface of the pre-installed insulation material, , is the number of the corners, .

[0039] Integrate the structural damage parameters of each connection point of the ring main unit to determine the hidden danger gain of each connection point of the ring main unit .

[0040] The present invention detects the structural damage parameters of each contact position of the ring network cabinet in a normal state cycle in real time, evaluates the hidden danger gain of each contact position of the ring network cabinet, and thereby understands the structural damage state of each contact position of the ring network cabinet in real time, and can promptly discover slight damage or abnormal changes at the contact position, thereby giving an early warning before a fault occurs, avoiding major faults caused by small hidden dangers not being eliminated in time.

[0041] The discharge data detection module is used to identify the corresponding discharge type of each partial discharge at each contact position of the ring main unit in a normal state cycle, and to identify the partial discharge intensity.

[0042] In a preferred embodiment, the discharge types include internal partial discharge, surface partial discharge, and corona discharge.

[0043] In a further preferred embodiment, the identification of the corresponding discharge type of each local discharge at each contact position of the ring network cabinet under the normal state cycle is specifically carried out in the following manner: locating the center of gravity position of each defect feature belonging to the structural damage parameter of each contact position of the ring network cabinet, the center of gravity position of each defect feature includes the deepest scratch position and the deepest point position of the pit corresponding to the dent feature on the surface of the insulating material, the center position of the weld contour corresponding to the irregular shape feature, the impurity distribution gathering point position corresponding to the processing defect feature inside the insulating material, and the deepest point position of the crack, and performing local discharge detection on the ring network cabinet by infrared thermal imaging detection technology to identify the corresponding focal point position of each local discharge at each contact position of the ring network cabinet under the normal state cycle and its local discharge intensity.

[0044] The method for obtaining the position of the deepest point of the crack is the same as the method for obtaining the position of the deepest scratch corresponding to the notch.

[0045] The principle of the infrared thermal imaging detection technology is as follows: local discharge is accompanied by the release of energy, part of which is converted into heat energy, causing the temperature of the discharge area to rise. The temperature change of the discharge area is captured by an infrared thermal imager, and a thermal image is generated. The focus point of the local discharge phenomenon of the ring network cabinet is then located by analyzing the thermal image. The local discharge intensity at the focus point can be determined by matching the temperature of the focus point with the local discharge intensities corresponding to the preset temperatures.

[0046] The focus point position refers to the position of the highest temperature within the local discharge area.

[0047] Set the discharge type to which each defect feature belongs. For example, the dent feature on the surface of the insulating material belongs to surface local discharge, the irregular shape feature belongs to corona discharge, and the processing defect feature inside the insulating material belongs to internal local discharge. Obtain the distance between the focal point position corresponding to each local discharge at each contact position of the ring main unit in the normal state cycle and the center of gravity position of each defect feature belonging to the structural damage parameter of the corresponding contact position, screen out the center of gravity position of the defect feature to which the minimum distance belongs, identify the discharge type to which its defect feature belongs, and use it as the corresponding discharge type of each local discharge at each contact position of the ring main unit in the normal state cycle.

[0048] The electrical coupling analysis module is used to detect the electrical coupling coefficient and mechanical coupling coefficient of each contact position of the ring main unit within the corresponding time limit of each meteorological characteristic, and analyze the coupling effect index of the electrical parameters of each contact position of the ring main unit due to environmental changes. .

[0049] In a preferred embodiment, the analysis of the coupling effect of environmental changes on the electrical parameters of each contact position of the ring main unit includes: extracting the meteorological characteristics of the ring main unit installation environment in a specified stage from the meteorological platform and its time limit , such as rainfall, sunshine intensity, wind pressure level, and detection of electrical parameters at each contact point of the ring main unit within the corresponding time limit of each meteorological characteristic The electrical parameters include short-time withstand current, power frequency withstand voltage, temperature rise value, and analyze the electrical coupling coefficient of each contact position of the ring network cabinet within the corresponding time limit of each meteorological characteristic. ,in Indicates the preset The corresponding characteristic comparison value of each meteorological characteristic, Indicates the preset The corresponding reference time limit value of each meteorological characteristic is Indicates the preset The corresponding reference values ​​of electrical parameters are: is the number of the meteorological feature, , is the number of electrical parameters, , is the number of electrical parameters.

[0050] The corresponding time limit of meteorological characteristics refers to the length of time that the meteorological characteristics are maintained, the short-time withstand current refers to the current fluctuation amplitude within the corresponding time limit of meteorological characteristics, the power frequency withstand voltage refers to the voltage fluctuation amplitude within the corresponding time limit of meteorological characteristics, and the temperature rise value refers to the temperature rise value within the corresponding time limit of meteorological characteristics.

[0051] Detect the partial discharge data of each contact position of the ring main unit under the normal state cycle. The partial discharge data includes the discharge time and discharge amplitude of each time, and identify the degree of partial discharge superposition of each contact position of the ring main unit under the normal state cycle. .

[0052] According to the partial discharge iterative degree analysis method of each contact position of the ring main unit, the partial discharge iterative degree of each contact position of the ring main unit within the corresponding time limit of each meteorological characteristic is obtained in the same way. , and then analyze the mechanical coupling coefficient of each contact position of the ring main unit within the corresponding time limit of each meteorological characteristic ,in Indicates the corresponding reference value of the preset partial discharge superposition degree.

[0053] Determine the coupling effect index of environmental changes on the electrical parameters of each contact position of the ring main unit , where They represent the corresponding weights of the preset electrical coupling coefficient and mechanical coupling coefficient respectively. Indicates the number of meteorological characteristics.

[0054] The present invention monitors the electrical parameters and partial discharge conditions of each contact position in real time, combines the changes in meteorological characteristics, and determines the coupling effect indicators of environmental changes on the electrical parameters of each contact position of the ring network cabinet. It can timely discover potential risks caused by environmental changes and help to formulate more accurate maintenance strategies.

[0055] In a further preferred embodiment, the identification of the degree of local discharge iterativeness of each contact position of the ring main unit in the normal state cycle is specifically as follows: each discharge time and each discharge amplitude are extracted from the local discharge data of each contact position of the ring main unit in the normal state cycle, and each discharge time is used as the horizontal coordinate and the discharge amplitude is used as the vertical coordinate to construct a discharge characteristic map of each contact position of the ring main unit in the normal state cycle, from which the discharge amplitude peak difference is extracted, and its ratio to the preset reference discharge amplitude peak difference is obtained, which is recorded as the local discharge weight of each contact position of the ring main unit in the normal state cycle.

[0056] The discharge amplitude peak difference refers to the difference between the maximum value and the minimum value of the discharge amplitude in the discharge characteristic spectrum.

[0057] The corresponding discharge types of each partial discharge at each contact position of the ring main unit in the normal state cycle are compared with each other, and the number of conversion times of the corresponding discharge type of partial discharge at each contact position of the ring main unit in the normal state cycle is identified, which is further multiplied by the partial discharge weight of each contact position of the ring main unit in the normal state cycle to obtain the degree of partial discharge superposition at each contact position of the ring main unit in the normal state cycle.

[0058] The present invention identifies the structural damage parameters of each contact position of the ring main unit to identify the corresponding discharge type of each partial discharge at each contact position of the ring main unit in a normal state cycle, and evaluates the degree of partial discharge iteration at each contact position of the ring main unit accordingly, so as to timely discover the potential risks caused by structural damage. Different types of partial discharges have different degrees and mechanisms of influence on the ring main unit, and accurate identification of the discharge type helps to more accurately determine the cause and severity of the discharge.

[0059] The discharge fault analysis module is used to identify the local discharge coefficient of each contact position of the ring main unit, perform classification processing on the local discharge characteristics of each contact position of the ring main unit, and determine the discharge fault position.

[0060] In a preferred embodiment, the discharge fault point module has the following contents: V1, hidden danger gain according to each contact position of the ring network cabinet , Coupling effect index of environmental changes on electrical parameters of each contact position of ring network cabinet , identify the partial discharge coefficient of each contact position of the ring network cabinet.

[0061] V2. Compare the partial discharge coefficient of each contact position of the ring main unit with the preset lower and upper threshold values ​​of the partial discharge coefficient. When the partial discharge coefficient of a certain contact position of the ring main unit is lower than the preset lower threshold value of the partial discharge coefficient, maintain the normal state cycle for normal inspection.

[0062] V3. When the partial discharge coefficient of a certain contact position of the ring main unit is within the range of the corresponding lower limit threshold and upper limit threshold of the preset partial discharge coefficient, shorten the corresponding inspection cycle of the normal state and pay more attention to the contact position of the ring main unit.

[0063] V4. When the partial discharge coefficient of a certain contact position of the ring main unit is higher than the corresponding upper limit threshold of the preset partial discharge coefficient, the contact position is located and recorded as the discharge fault position.

[0064] In a further preferred embodiment, the partial discharge coefficient of each contact position of the ring main unit is identified by the corresponding formula: ,in Indicates the corresponding correction factor of the preset partial discharge coefficient.

[0065] By identifying the local discharge coefficient of each contact position of the ring main unit, the present invention can accurately identify which contact positions have local discharge phenomena, which is helpful to improve the overall reliability and stability of the equipment. In the case of limited detection resources, the local discharge characteristics of each contact position of the ring main unit are graded through periodic regulation to ensure that resources are reasonably allocated. At the same time, the specific location of the discharge fault can be quickly determined, shortening the troubleshooting time, thereby improving the operation and maintenance efficiency.

[0066] See also Figure 2 As shown, the second aspect of the present invention provides a real-time monitoring method for a ring main unit based on digital intelligent perception, comprising the following steps: Step 1, real-time detection of structural damage parameters of each contact position of the ring main unit under a normal state cycle through non-destructive testing technology, and evaluation of hidden danger gains of each contact position of the ring main unit.

[0067] Step 2: Identify the corresponding discharge type of each partial discharge at each contact position of the ring main unit in a normal state cycle, and identify the partial discharge intensity.

[0068] Step 3: Detect the electrical coupling coefficient and mechanical coupling coefficient of each contact point of the ring main unit within the corresponding time limit of each meteorological characteristic, and analyze the coupling effect index of the environmental change on the electrical parameters of each contact point of the ring main unit.

[0069] Step 4: Identify the partial discharge coefficient of each contact position of the ring main unit, perform classification processing on the partial discharge characteristics of each contact position of the ring main unit, and determine the discharge fault position.

[0070] The above contents are merely examples and explanations of the concept of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the concept of the invention or exceed the scope defined by the present invention, they shall all fall within the protection scope of the present invention.

Claims

1. A real-time monitoring module for ring main unit based on digital intelligent perception, characterized in that: include: The contact structure detection module is used to detect the structural damage parameters of each contact position of the ring main unit in real time under the normal state cycle through non-destructive testing technology, and evaluate the hidden danger gain of each contact position of the ring main unit. , and number each contact point as ; The discharge data detection module is used to identify the corresponding discharge type of each partial discharge at each contact position of the ring main unit in the normal state cycle, and to identify its partial discharge intensity; The electrical coupling analysis module is used to detect the electrical coupling coefficient and mechanical coupling coefficient of each contact position of the ring main unit within the corresponding time limit of each meteorological characteristic, and analyze the coupling effect index of the electrical parameters of each contact position of the ring main unit due to environmental changes ; The discharge fault analysis module is used to identify the partial discharge coefficient of each contact position of the ring main unit, classify the partial discharge characteristics of each contact position of the ring main unit, and determine the discharge fault position; The method for evaluating the hidden danger gain of each connection point of the ring network cabinet is as follows: comparing the depth propagation direction of the surface scratches of the insulating material at each connection point of the ring network cabinet with the depth propagation direction of the internal cracks of the insulating material at the corresponding connection point, identifying the inner and outer space distances corresponding to the depth propagation directions of the surface scratches of the insulating material at each connection point of the ring network cabinet and the internal cracks. and spatial overlap angle , analyze the overlap of damage characteristics of surface scratches and internal cracks of the insulation material at each contact point of the ring network cabinet ,in They represent the preset reference space distance and reference overlap angle respectively, and e is a natural constant. Similarly, the overlap degree of damage characteristics of the surface weld of the insulating material and the internal cracks at each joint position of the ring network cabinet is analyzed. ; Based on the structural damage parameters of each connection point of the ring main unit under normal state cycle, the structural damage spread of the insulation material at each connection point of the ring main unit is analyzed. ; Integrate the structural damage parameters of each connection point of the ring main unit to determine the hidden danger gain of each connection point of the ring main unit ; The analysis of the coupling effect of environmental changes on the electrical parameters of each contact position of the ring main unit includes: extracting the meteorological characteristics and their time limits of the ring main unit installation environment in a specified stage from the meteorological platform, detecting the electrical parameters of each contact position of the ring main unit within the corresponding time limit of each meteorological characteristic, and analyzing the electrical coupling coefficient of each contact position of the ring main unit within the corresponding time limit of each meteorological characteristic. , is the number of the meteorological feature, ; Detect the partial discharge data of each contact position of the ring main unit in the normal state cycle, and identify the degree of partial discharge superposition of each contact position of the ring main unit in the normal state cycle; Similarly, the degree of partial discharge superposition at each contact point of the ring main unit within the corresponding time limit of each meteorological characteristic is obtained, and then the mechanical coupling coefficient of each contact point of the ring main unit within the corresponding time limit of each meteorological characteristic is analyzed. ; Determine the coupling effect index of environmental changes on the electrical parameters of each contact position of the ring main unit , where They represent the corresponding weights of the preset electrical coupling coefficient and mechanical coupling coefficient respectively. Indicates the number of meteorological characteristics.

2. According to claim 1, a real-time monitoring module for ring main unit based on digital intelligent perception is characterized in that: The structural damage parameters include dent features and irregular shape features on the surface of the insulating material, and processing defect features inside the insulating material; The indentation characteristics of the insulating material surface are specifically the depth of the indentation and the direction of its depth spreading, the depth of the pit and the concave side curvature value; The irregular shape characteristics are specifically the number of edges and corners and the sharpness of each edge and corner, the opening and closing of the weld and the direction of its propagation; The processing defect characteristics inside the insulating material are specifically the impurity distribution and accumulation points and the impurity content, the depth of the crack and the depth propagation direction of the crack.

3. According to the real-time monitoring module of the ring main unit based on digital intelligent perception according to claim 1, it is characterized in that: The discharge types include internal partial discharge, surface partial discharge and corona discharge.

4. According to the real-time monitoring module of the ring main unit based on digital intelligent perception according to claim 1, it is characterized in that: The identification of the corresponding discharge type of each partial discharge at each contact position of the ring main unit in a normal state cycle is specifically carried out in the following manner: locating the center of gravity of each defect characteristic belonging to the structural damage parameter of each contact position of the ring main unit, and identifying the corresponding focal point position of each partial discharge at each contact position of the ring main unit in a normal state cycle and its partial discharge intensity; Set the discharge type to which each defect feature belongs, obtain the distance between the focus point position corresponding to each local discharge at each contact position of the ring main unit in the normal state cycle and the center of gravity position of each defect feature belonging to the structural damage parameter of the corresponding contact position, screen out the center of gravity position of the defect feature to which the minimum distance belongs, identify the discharge type to which its defect feature belongs, and use it as the corresponding discharge type of each local discharge at each contact position of the ring main unit in the normal state cycle.

5. According to the real-time monitoring module of the ring main unit based on digital intelligent perception according to claim 1, it is characterized in that: The identification of the degree of local discharge superposition at each contact position of the ring main unit in a normal state cycle is specifically as follows: extracting each discharge time and each discharge amplitude from the local discharge data at each contact position of the ring main unit in a normal state cycle, taking each discharge time as the abscissa and the discharge amplitude as the ordinate, constructing a discharge characteristic spectrum at each contact position of the ring main unit in a normal state cycle, extracting the discharge amplitude peak difference therefrom, obtaining the ratio of the peak difference to the preset reference discharge amplitude peak difference, and recording it as the local discharge weight at each contact position of the ring main unit in a normal state cycle; The corresponding discharge types of each partial discharge at each contact position of the ring main unit in the normal state cycle are compared with each other, and the number of conversion times of the corresponding discharge type of partial discharge at each contact position of the ring main unit in the normal state cycle is identified, which is further multiplied by the partial discharge weight of each contact position of the ring main unit in the normal state cycle to obtain the degree of partial discharge superposition at each contact position of the ring main unit in the normal state cycle.

6. The real-time monitoring module for ring main unit based on digital intelligent perception according to claim 1 is characterized in that: The discharge fault analysis module has the following contents: V1. Identify the partial discharge coefficient of each contact point of the ring main unit; V2. Compare the partial discharge coefficient of each contact position of the ring main unit with the preset lower limit threshold and upper limit threshold of the partial discharge coefficient. When the partial discharge coefficient of a certain contact position of the ring main unit is lower than the preset lower limit threshold of the partial discharge coefficient, maintain the normal state cycle for normal inspection; V3. When the partial discharge coefficient of a certain contact position of the ring main unit is within the preset range of the corresponding lower limit threshold and upper limit threshold of the partial discharge coefficient, shorten the corresponding inspection cycle in the normal state and pay more attention to the contact position of the ring main unit; V4. When the partial discharge coefficient of a certain contact position of the ring main unit is higher than the corresponding upper limit threshold of the preset partial discharge coefficient, the contact position is located and recorded as the discharge fault position.

7. A real-time monitoring module for ring main unit based on digital intelligent perception according to claim 6, characterized in that: The corresponding formula for identifying the partial discharge coefficient of each contact position of the ring main unit is: ,in Indicates the corresponding correction factor of the preset partial discharge coefficient.

8. A real-time monitoring method for a ring main unit based on digital intelligent perception, executed by a module according to any one of claims 1 to 7, characterized in that: The following steps are involved: Step 1: Use non-destructive testing technology to detect the structural damage parameters of each connection point of the ring main unit in a normal state cycle in real time, and evaluate the hidden danger gain of each connection point of the ring main unit; Step 2, identifying the corresponding discharge type of each partial discharge at each contact position of the ring main unit in a normal state cycle, and identifying its partial discharge intensity; Step 3: Detect the electrical coupling coefficient and mechanical coupling coefficient of each contact position of the ring main unit within the corresponding time limit of each meteorological characteristic, and analyze the coupling effect index of the environmental change on the electrical parameters of each contact position of the ring main unit; Step 4: Identify the partial discharge coefficient of each contact position of the ring main unit, perform classification processing on the partial discharge characteristics of each contact position of the ring main unit, and determine the discharge fault position.

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