Composite insulator deterioration degree evaluation device considering wet pollution state and use method thereof
By simulating the wet and dirty state in the test chamber, measuring the actual working voltage and current of the composite insulator, and calculating the evaluation factor, the problem of difficult to evaluate the degree of deterioration of the composite insulator under wet and dirty conditions is solved, and the safety of the transmission line is improved.
Patent Information
- Application Number
- CN202411335516.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-24
- Publication Date
- 2025-01-14
AI Technical Summary
The prior art lacks an effective method for evaluating the degree of deterioration of composite insulators in wet and dirty states, which makes it difficult to ensure the safety of transmission lines.
A device including a test chamber, humidity and filth generation simulation device is designed. The actual working voltage and current of the composite insulator under different humidity and soil accumulation are measured by the detection device, and the evaluation factor for the degree of deterioration of the composite insulator is calculated, providing a A method for evaluating the degree of deterioration of composite insulators considering wet and dirty state.
The precise simulation of the surface area of composite insulators and the test environment humidity is achieved, and the accuracy of the evaluation of composite insulator deterioration is improved. It can judge the good, normal or severe deterioration status of the equipment based on the evaluation factor, ensuring the safe operation of the transmission line.
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Figure CN119310409A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of composite insulator safety risk assessment, and in particular to a composite insulator degradation degree assessment device taking wet contamination state into consideration and a use method thereof. Background Art
[0002] With the development requirements of new power systems, people have higher requirements for the stability of the power grid. As the main artery of power transmission, the safe operation of transmission lines is of vital importance. Composite insulators are important equipment in line operation. They are subjected to the operating voltage of conductors for a long time, resulting in the continuous reduction of insulation performance and continuous degradation of equipment. According to statistics, insulator flashover accounts for the vast majority of line tripping accidents, and composite insulator flashover is very likely to occur during light rain, mainly because wet and dirty conditions will reduce the creepage distance of composite insulators, causing flashover accidents.
[0003] At present, there are few evaluations of the degree of degradation of composite insulators under working conditions, and there is a lack of a test platform and evaluation method combined with actual operating conditions. In addition, there is no evaluation method for the degree of degradation of composite insulators under wet and polluted conditions. Therefore, in order to accurately evaluate the degree of degradation of composite insulators, a composite insulator degradation degree evaluation method considering wet and polluted conditions is urgently needed to accurately evaluate the degree of degradation of composite insulators and improve the operation safety of transmission lines. Summary of the invention
[0004] The technical problem to be solved by the present invention is to provide a composite insulator degradation degree assessment device taking into account the wet contamination state and a use method thereof, so as to accurately assess the degradation degree of the composite insulator to improve the operation safety of the transmission line.
[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a composite insulator degradation degree assessment device considering the wet pollution state, comprising a test box, a composite insulator is arranged in the test box, a humidity generating device is arranged on one side of the composite insulator, a pollution generating simulation device is arranged on the other side, and the pollution generating simulation device is connected to the pollution nozzle; one end of the composite insulator is connected to the voltage generator, and the other end is connected to the grounding device; It also includes a detection device, which includes a pollution degree tester arranged on one side of the composite insulator, a humidity sensor 1 and a humidity sensor 2 arranged on the top and bottom of the test box, and a current sensor sleeved on the grounding wire of the composite insulator.
[0006] Preferably, it also includes a host, which is electrically connected to the pollution degree tester, humidity sensor 1 and humidity sensor 2 through data collector 1; The host is electrically connected to the current sensor via the second data collector; The host is electrically connected to the pollution generation simulation device through the pollution generation simulation device controller; The host is electrically connected to the humidity generating device through the humidity generating control device.
[0007] Preferably, the output end of the voltage generator is connected to the capacitive voltage divider through high-voltage cable 1, the capacitive voltage divider is connected to the input end of the control switch through high-voltage cable 2, and the output end of the control switch is connected to one end of the composite insulator through high-voltage cable 3.
[0008] Preferably, the signal output end of the capacitive voltage divider is connected to the second data collector, the signal input end of the voltage generator is connected to the voltage generation controller, and the voltage generation controller is connected to the host.
[0009] Preferably, the grounding end of the voltage generator is connected to grounding electrode three, the grounding end of the capacitive voltage divider is connected to grounding electrode two, and the grounding end of the test box is connected to grounding electrode one.
[0010] A method for using a composite insulator degradation degree assessment device considering a wet contamination state comprises the following steps: S1: Set the test humidity on the host, control the humidity generating control device through the host to make the humidity generating device work, test the test humidity in the test chamber through humidity sensor 1 and humidity sensor 2, and feed back the test humidity in the test chamber to the host through data acquisition device 1, so as to adjust the test humidity in the test chamber to the set humidity; S2: The host sends a pollution simulation signal to the pollution generation simulation device controller. The pollution generation simulation device controller controls the pollution generation simulation device and the pollution nozzle to complete the surface pollution simulation of the composite insulator. The pollution degree tester measures the surface pollution degree of the composite insulator. W ; Adjust the control switch to turn on the control switch, and the host controls the voltage generator output amplitude through the voltage generator controller U The rated voltage of the composite insulator is measured by a capacitive voltage divider. U 0 and transmit it to the host, and measure the composite insulator voltage through a high-precision current sensor U The actual working current generated at 0 I 0, and transmit it to the host through data collector 2, and adjust the control switch to disconnect it; S3: The range of contamination is defined as: 1g / L< W ≤200g / L, of which W The degree of contamination is W =1g / L, every interval W 0 takes a dirty gradient, a total of nThe test state of the group is set, and step S2 is repeated. The test humidity is measured by the capacitive voltage divider and the high-precision current sensor. H The actual working voltage obtained for each pollution level is U 0 and actual working current I 0; S4: Define the test humidity range as: 0%-100%, where H To test humidity, H =0% starts, each interval H 0 takes a humidity gradient, m Set up humidity test state and repeat the above test steps; S5: What you will get n × m Substitute the actual working voltage and current data of the group, the test humidity and the degree of pollution into formula (1) to obtain the first-level assessment factor of the composite insulator degradation degree. U 1ij : ; (1) U 1ij —No. i Test humidity and j The first-level assessment factor of composite insulator degradation degree under group pollution degree, I 0ij —No. i Test humidity and j The actual working current data measured under the group pollution level, U 0ij —No. i Test humidity and j The actual working voltage measured under the group pollution level, W j —No. j The degree of contamination of the group, H i —No. i Group test humidity, m - humidity test times, n —Number of fouling tests; S6: What you will get n × m Substitute the actual working voltage and current data of the group and the test humidity into formula (2) to obtain m Secondary evaluation factor of the degradation degree of composite insulator U 2i ; ; (2) U 2i —No.i Secondary evaluation factor of composite insulator degradation degree under group test humidity; S7: What you will get n × m Substitute the actual working voltage and current data of the group and the degree of pollution into formula (3) to obtain n Three-level evaluation factors for the degradation degree of composite insulators U 3j ; ; (3) U 3j —No. j Three-level assessment factors for composite insulator degradation under group pollution levels; S8: Based on the above calculations, the comprehensive evaluation factors of the degradation degree of composite insulators under the influence of wet pollution are U for: ; (4) U — Factors for evaluating the working characteristics of composite insulators, Q1 — standard weighting factor one, Q2 — standard weighting factor two, Q3 — standard weighting factor three; S9: Based on the above steps, when When , it indicates that the composite insulator is in good condition; when When , it indicates that the deterioration degree of the composite insulator is normal and timely maintenance can be arranged; when ), it indicates that the composite insulator is seriously deteriorated and needs to be repaired as soon as possible; when When the composite insulator is damaged, it should be replaced as soon as possible.
[0011] The present invention provides a composite insulator degradation degree assessment device taking into account the wet contamination state and a method for using the same, which realizes the simulation of the degree of contamination on the surface of the composite insulator and the humidity of the test environment, and tests the actual working voltage value and the actual working current value of the composite insulator with different degrees of contamination under different humidity, and can effectively simulate the wet contamination state of the composite insulator under actual working conditions. The controller of the contamination generation simulation device can realize the accurate simulation of the contamination on the surface of the composite insulator, and the controller of the humidity generation device can effectively realize the simulation of the humidity of the test environment of the composite insulator, which is conducive to improving the accuracy of the composite insulator degradation degree assessment test and analyzing the correlation between the wet contamination state and the actual working voltage and current of the composite insulator. The comprehensive assessment factor of the composite insulator degradation degree takes into account the influence of the wet contamination state on the composite insulator degradation degree assessment, and further improves the accuracy of the composite insulator degradation degree assessment; the test device is easy to operate, safe and reliable, and the test device can be used for tests under different test humidity and different degrees of contamination, and has universal applicability. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] The present invention will be further described below in conjunction with the accompanying drawings and embodiments: Figure 1 It is a structural schematic diagram of the present invention; Figure 2 The figure is a flow chart of the method of the present invention. DETAILED DESCRIPTION
[0013] like Figure 1 As shown, the test platform of the present invention includes: a host 01, a pollution generation simulation device controller 02, a pollution generation simulation device 03, a pollution nozzle 04, a pollution degree tester 05, a humidity generation control device 06, a humidity generation device 07, a humidity sensor 1 08a, a humidity sensor 2 08b, a voltage generation controller 09, a voltage generator 10, a capacitive voltage divider 11, a high-voltage cable 1 12a, a high-voltage cable 2 12b, a high-voltage cable 3 12c, a control switch 13, a composite insulator 14, a high-precision current sensor 15, a grounding device 16, a data collector 1 17a, a data collector 2 17b, a test box 18, a grounding electrode 1 19a, a grounding electrode 2 19b, and a grounding electrode 3 19c; Wherein: the signal input end of the voltage generator 10 is connected to the voltage generation controller 09, the voltage generation controller 09 is connected to the host 01, the output end of the voltage generator 10 is connected to the capacitive voltage divider 11 through the high-voltage cable 12a, the capacitive voltage divider 11 is connected to the input end of the control switch 13 through the high-voltage cable 2 12b, the output end of the control switch 13 is connected to the upper end of the composite insulator 14 through the high-voltage cable 3 12c, and the lower end of the composite insulator 14 is connected to the grounding device 16; The grounding end of the voltage generator 09 is connected to the grounding electrode 3 19c, the grounding end of the capacitor voltage divider 11 is connected to the grounding electrode 2 19b, the grounding end of the test box 18 is connected to the grounding electrode 1 19a, the signal output end of the capacitor voltage divider 11 is connected to the data acquisition device 2 17b, the high-precision current sensor 15 is installed on the connection line between the composite insulator 14 and the grounding device 16, the high-precision current sensor 15 is connected to the data acquisition device 2 17b, and the data acquisition device 2 17b is connected to the host 01; The output end of the pollution generation simulation device controller 02 is connected to the pollution generation simulation device 03, the input end of the pollution generation simulation device controller 02 is connected to the host 01, the pollution nozzle 04 is connected to the pollution generation simulation device 03, the output end of the humidity generation control device 06 is connected to the humidity generation device 07, and the input end of the humidity generation control device 06 is connected to the host 01; The pollution level tester 05 is installed on the composite insulator 14, the pollution level tester 05 is connected to the data collector 17a, the humidity sensor 1 08a and the humidity sensor 2 08b are connected to the data collector 17a, and the data collector 17a is connected to the host 01; The composite insulator 14, high-precision current sensor 15, pollution level tester 05, humidity sensor 1 08a, humidity sensor 2 08b, pollution generation simulation device 03, pollution nozzle 04, humidity generation device 07, and control switch 13 are placed in a test box 18; like Figure 2 As shown, a method for evaluating the degradation degree of a composite insulator considering a wet pollution state comprises the following steps: S1: Set the test humidity on the host 01, control the humidity generating control device 06 through the host 01 to make the humidity generating device 07 work, test the test humidity in the test box 18 through the humidity sensor 1 08a and the humidity sensor 2 08b, and feed back the test humidity in the test box 18 to the host 01 through the data acquisition device 1 17a, so as to adjust the test humidity in the test box 18 to the set humidity; S2: The host 01 sends a pollution simulation signal to the pollution generation simulation device controller 02, and the pollution generation simulation device controller 02 controls the pollution generation simulation device 03 and the pollution nozzle 04 to complete the surface pollution simulation of the composite insulator 14, and the pollution degree tester 05 measures the surface pollution degree of the composite insulator 14. W ; Adjust the control switch 13 to turn on the control switch 13, the host 01 controls the voltage generator 10 to output an amplitude of U The rated voltage of the composite insulator 14 is measured by the capacitive voltage divider 11. U 0 and transmits it to the host 01, and measures the voltage of the composite insulator 14 through the high-precision current sensor 15 U The actual working current generated at 0 I 0, and transmit it to the host 01 through the data acquisition device 17b, and adjust the control switch 13 to disconnect the control switch 13; S3: The range of contamination is defined as: 1g / L< W ≤200g / L, of which W The degree of contamination is W =1g / L, every interval W 0 takes a dirty gradient, a total of n The test state of the group is set, and step S2 is repeated, and the test humidity is set by measuring the capacitive voltage divider 11 and the high-precision current sensor 15. H The actual working voltage obtained for each pollution level is U 0 and actual working currentI 0; S4: Define the test humidity range as: 0%-100%, where H To test humidity, H =0% starts, each interval H 0 takes a humidity gradient, m Set up humidity test state and repeat the above test steps; S5: What you will get n × m Substitute the actual working voltage and current data of the group, the test humidity and the degree of pollution into formula (1) to obtain the first-level assessment factor of the composite insulator degradation degree. U 1ij : (1) U 1ij —No. i Test humidity and j The first-level assessment factor of composite insulator degradation degree under group pollution degree, I 0ij —No. i Test humidity and j The actual working current data measured under the group pollution level, U 0ij —No. i Test humidity and j The actual working voltage measured under the group pollution level, W j —No. j The degree of contamination of the group, H i —No. i Group test humidity, m - humidity test times, n —Number of fouling tests; S6: What you will get n × m Substitute the actual working voltage and current data of the group and the test humidity into formula (2) to obtain m Secondary evaluation factor of the degradation degree of composite insulator U 2i ; (2) U 2i —No. i Secondary evaluation factor of composite insulator degradation degree under group test humidity; S7: What you will get n × mSubstitute the actual working voltage and current data of the group and the degree of pollution into formula (3) to obtain n Three-level evaluation factors for the degradation degree of composite insulators U 3j ; (3) U 3j —No. j Three-level assessment factors for composite insulator degradation under group pollution levels; S8: Based on the above calculations, the comprehensive evaluation factors of the degradation degree of composite insulators under the influence of wet pollution are U for: (4) U — Factors for evaluating the working characteristics of composite insulators, Q1 — standard weighting factor one, Q2 — standard weighting factor two, Q3 — standard weighting factor three; S9: Based on the above steps, when When , it indicates that the composite insulator is in good condition; when When , it indicates that the deterioration degree of the composite insulator is normal and timely maintenance can be arranged; when ), it indicates that the composite insulator is seriously deteriorated and needs to be repaired as soon as possible; when When the composite insulator is damaged, it should be replaced as soon as possible.
[0014] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limiting the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.
Claims
1. A composite insulator degradation degree assessment device considering wet pollution state, characterized in that: The test box (18) comprises a composite insulator (14) arranged in the test box (18); a humidity generating device (07) is arranged on one side of the composite insulator (14); a pollution generating simulation device (03) is arranged on the other side; the pollution generating simulation device (03) is connected to the pollution nozzle (04); one end of the composite insulator (14) is connected to the voltage generator (10), and the other end is connected to the grounding device (16); It also includes a detection device, which includes a pollution level tester (05) arranged on one side of the composite insulator (14), a humidity sensor 1 (08a) and a humidity sensor 2 (08b) arranged on the top and bottom of the test box (18), and a current sensor (15) sleeved on the grounding wire of the composite insulator (14).
2. The composite insulator degradation degree assessment device considering the wet contamination state according to claim 1, characterized in that: It also includes a host (01), the host (01) being electrically connected to the pollution degree tester (05), the humidity sensor 1 (08a) and the humidity sensor 2 (08b) through the data collector 1 (17a); The host (01) is electrically connected to the current sensor (15) via the second data acquisition device (17b); The host (01) is electrically connected to the pollution generation simulation device (03) via the pollution generation simulation device controller (02); The host (01) is electrically connected to the humidity generating device (07) via the humidity generating control device (06).
3. The composite insulator degradation degree assessment device considering the wet contamination state according to claim 2, characterized in that: The output end of the voltage generator (10) is connected to the capacitive voltage divider (11) through a high-voltage cable 1 (12a), the capacitive voltage divider (11) is connected to the input end of the control switch (13) through a high-voltage cable 2 (12b), and the output end of the control switch (13) is connected to one end of the composite insulator (14) through a high-voltage cable 3 (12c).
4. The composite insulator degradation degree assessment device considering wet contamination state according to claim 3, characterized in that: The signal output end of the capacitive voltage divider (11) is connected to the second data acquisition device (17b), the signal input end of the voltage generator (10) is connected to the voltage generation controller (09), and the voltage generation controller (09) is connected to the host (01).
5. The composite insulator degradation degree assessment device considering wet contamination state according to claim 4, characterized in that: The grounding end of the voltage generator (09) is connected to the grounding electrode three (19c), the grounding end of the capacitive voltage divider (11) is connected to the grounding electrode two (19b), and the grounding end of the test box (18) is connected to the grounding electrode one (19a).
6. A method for using a composite insulator degradation degree assessment device considering wet contamination state according to any one of claims 2 to 5, characterized in that: The following steps are involved: S1: setting the test humidity on the host (01), controlling the humidity generating control device (06) through the host (01) to operate the humidity generating device (07), testing the test humidity in the test box (18) through the humidity sensor 1 (08a) and the humidity sensor 2 (08b), feeding back the test humidity in the test box (18) to the host (01) through the data acquisition device 1 (17a), thereby adjusting the test humidity in the test box (18) to the set humidity; S2: A pollution simulation signal is sent to the pollution generation simulation device controller (02) through the host (01), and the pollution generation simulation device controller (02) controls the pollution generation simulation device (03) and the pollution nozzle (04) to complete the surface pollution simulation of the composite insulator (14), and the pollution degree tester (05) is used to measure the surface pollution degree of the composite insulator (14). W ; Adjust the control switch (13) to turn on the control switch (13), and the host (01) controls the voltage generator (10) to output an amplitude of U The rated voltage of the composite insulator (14) is measured by a capacitive voltage divider (11). U 0 and transmits it to the host (01), and measures the voltage of the composite insulator (14) through a high-precision current sensor (15). U The actual working current generated at 0 I 0, and transmit it to the host (01) through the data acquisition device 2 (17b), and adjust the control switch (13) to disconnect the control switch (13); S3: The range of contamination is defined as: 1g / L< W ≤200g / L, of which W For the degree of pollution, W =1g / L, every interval W 0 takes a dirty gradient, a total of n The test state of the group is set, and step S2 is repeated, and the test humidity at the set value is measured by the capacitive voltage divider (11) and the high-precision current sensor (15). H The actual working voltage obtained for each pollution level is U 0 and actual working current I 0; S4: Define the test humidity range as: 0%-100%, where H To test humidity, H =0% starts, each interval H 0 takes a humidity gradient, m Set up humidity test state and repeat the above test steps; S5: What you will get n × m Substitute the actual working voltage and current data of the group, the test humidity and the degree of pollution into formula (1) to obtain the first-level assessment factor of the composite insulator degradation degree. U 1ij : ；（1） U 1ij —No. i Test humidity and j The first-level assessment factor of composite insulator degradation degree under group pollution degree, I 0ij —No. i Test humidity and j The actual working current data measured under the group pollution level, U 0ij —No. i Test humidity and j The actual working voltage measured under the group pollution level, W j —No. j The degree of contamination of the group, H i —No. i Group test humidity, m - humidity test times, n —Number of fouling tests; S6: What you will get n × m Substitute the actual working voltage and current data of the group and the test humidity into formula (2) to obtain m Secondary evaluation factor of the degradation degree of composite insulator U 2i ; ；（2） U 2i —No. i Secondary evaluation factor of composite insulator degradation degree under group test humidity; S7: What you will get n × m Substitute the actual working voltage and current data of the group and the degree of pollution into formula (3) to obtain n Three-level evaluation factors for the degradation degree of composite insulators U 3j ; ；（3） U 3j —No. j Three-level assessment factors for composite insulator degradation under group pollution levels; S8: Based on the above calculations, the comprehensive evaluation factors of the degradation degree of composite insulators under the influence of wet pollution are U for: ；（4） U — Factors for evaluating the working characteristics of composite insulators, Q1 — standard weighting factor one, Q2 — standard weighting factor two, Q3 — standard weighting factor three; S9: Based on the above steps, when When , it indicates that the composite insulator is in good condition; when When , it indicates that the deterioration degree of the composite insulator is normal and timely maintenance can be arranged; when ), it indicates that the composite insulator is seriously deteriorated and needs to be repaired as soon as possible; When the composite insulator is damaged, it should be replaced as soon as possible.