CN112505507A - Automatic protection device for oil-filled terminal of high-voltage cable - Google Patents
Automatic protection device for oil-filled terminal of high-voltage cable Download PDFInfo
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- CN112505507A CN112505507A CN202011413634.1A CN202011413634A CN112505507A CN 112505507 A CN112505507 A CN 112505507A CN 202011413634 A CN202011413634 A CN 202011413634A CN 112505507 A CN112505507 A CN 112505507A
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- 239000000523 sample Substances 0.000 claims abstract description 66
- 150000001875 compounds Chemical class 0.000 claims abstract description 61
- 238000001514 detection method Methods 0.000 claims abstract description 49
- 230000003211 malignant effect Effects 0.000 claims abstract description 36
- 238000012544 monitoring process Methods 0.000 claims abstract description 31
- 210000004907 gland Anatomy 0.000 claims description 23
- 238000007789 sealing Methods 0.000 claims description 23
- 238000012545 processing Methods 0.000 claims description 19
- 230000009471 action Effects 0.000 claims description 18
- 239000003292 glue Substances 0.000 claims description 16
- 238000013021 overheating Methods 0.000 claims description 14
- 208000028659 discharge Diseases 0.000 claims description 13
- 229910052573 porcelain Inorganic materials 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 10
- 238000009413 insulation Methods 0.000 claims description 7
- 239000012212 insulator Substances 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 238000011161 development Methods 0.000 claims description 5
- 238000003491 array Methods 0.000 claims description 4
- 238000011897 real-time detection Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 3
- 238000009421 internal insulation Methods 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- 238000004148 unit process Methods 0.000 claims description 3
- 230000015556 catabolic process Effects 0.000 claims description 2
- 238000006731 degradation reaction Methods 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000002955 isolation Methods 0.000 abstract 1
- 230000001681 protective effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1218—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing using optical methods; using charged particle, e.g. electron, beams or X-rays
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B15/00—Measuring arrangements characterised by the use of electromagnetic waves or particle radiation, e.g. by the use of microwaves, X-rays, gamma rays or electrons
- G01B15/06—Measuring arrangements characterised by the use of electromagnetic waves or particle radiation, e.g. by the use of microwaves, X-rays, gamma rays or electrons for measuring the deformation in a solid
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/0096—Radiation pyrometry, e.g. infrared or optical thermometry for measuring wires, electrical contacts or electronic systems
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
- H02H7/226—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices for wires or cables, e.g. heating wires
Abstract
The invention relates to an automatic protection device of a high-voltage cable oil filling terminal, which comprises two high-voltage cable oil filling terminals, two multifunctional compound eye detection devices, a high-voltage circuit breaker and a control device, wherein the high-voltage circuit breaker is connected with a power supply side and controls the on-off of a high-voltage cable; the multifunctional compound eye detection device comprises a plurality of miniature infrared probes, miniature high-definition visible light probes and miniature X-ray probes, the three miniature probes are arranged at intervals to form a compound eye structure, the two multifunctional compound eye detection devices are respectively installed at proper positions beside corresponding high-voltage cable oil filling terminals to detect the relevant working states of the high-voltage cable oil filling terminals, and the two multifunctional compound eye detection devices are respectively electrically connected with the control device to transmit monitoring signals of the miniature probes to the control device in real time. The device is beneficial to monitoring the working and fault conditions of the cable oil filling terminal in real time, comprehensively and accurately, can perform false-proof identification on sudden malignant faults, and quickly and accurately executes related switch tripping and fault isolation protective measures.
Description
Technical Field
The invention belongs to the technical field of power monitoring, and particularly relates to an automatic protection device for a high-voltage cable oil-filling terminal.
Background
In the prior art, the monitoring scheme of the 220kV high-voltage cable oil-filled terminal mainly has the following three modes: 1) workers carry infrared and ultraviolet detection instruments respectively to detect overheating and discharging faults of the power high-voltage cable terminal; 2) installing a common visible light probe, and carrying out visual observation on the power high-voltage cable terminal; 3) and (5) power failure, and performing electrical tests such as insulation, voltage resistance, leakage, direct current resistance and the like. In the former two modes, because the monitoring means is not adaptively designed according to the structural characteristics and the operation mode of the 220kV high-voltage cable oil-filled terminal equipment, the heating and discharging faults of the 220kV high-voltage cable oil-filled terminal can be omitted or cannot be accurately detected in time in actual application, and the internal components of the high-voltage cable oil-filled terminal equipment in operation cannot be monitored in a perspective way, although the internal and external faults of the 220kV high-voltage cable oil-filled terminal equipment can be indirectly detected through a related high-voltage test, the operation can be carried out only when power failure occurs. Therefore, the existing monitoring scheme cannot meet the requirements of carrying out real-time, online and internal and external comprehensive and accurate monitoring and executing anti-error protection actions on the 220kV high-voltage cable oil-filled terminal equipment.
Disclosure of Invention
The invention aims to provide an automatic protection device for a high-voltage cable oil filling terminal, which is beneficial to comprehensively and accurately monitoring the working and fault conditions of the cable oil filling terminal in real time and executing the requirement of anti-misoperation protection.
In order to achieve the purpose, the invention adopts the technical scheme that: an automatic protection device of a high-voltage cable oil-filling terminal comprises two high-voltage cable oil-filling terminals, two multifunctional compound eye detection devices, a high-voltage circuit breaker and a control device, wherein the high-voltage circuit breaker is used for connecting a power supply side and controlling the on-off of a 220kV high-voltage cable, the high-voltage cable oil-filling terminal is used for protecting and supporting the connection, transition and conversion of the 220kV high-voltage cable, the primary input end of the high-voltage circuit breaker is electrically connected to the power supply side through a high-voltage wire, the primary output end of the high-voltage circuit breaker is electrically connected to an outlet hardware fitting of a first high-voltage cable oil-filling terminal through the high-voltage wire, the first high-voltage cable oil-filling terminal is electrically connected with a second high-voltage cable oil-filling terminal through the 220kV high-voltage cable; the multifunctional compound eye detection device comprises a plurality of miniature infrared probes, miniature high-definition visible light probes and miniature X-ray probes, wherein the three miniature probes are arranged at intervals to form a compound eye structure to form the multifunctional compound eye detection device, the two multifunctional compound eye detection devices are respectively arranged at proper positions beside corresponding high-voltage cable oil filling terminals to detect the relevant working states of the high-voltage cable oil filling terminals, the miniature infrared probes are used for detecting sudden malignant heating faults in the operation of the high-voltage cable oil filling terminals, the miniature high-definition visible light probes are used for detecting sudden malignant discharge faults and serious oil leakage in the operation of the high-voltage cable oil filling terminals, the miniature X-ray probes are used for detecting the faults of internal components of the high-voltage cable oil filling terminals, and the multifunctional compound eye detection device comprises an internal insulation wrapping tape, insulation glue and an insulation fastener which generate a large number of chemical reactions due to the serious degradation of internal, the multifunctional compound eye detection device comprises an insulating bag belt, insulating glue, an insulating fastener, two multifunctional compound eye detection devices and a control device, wherein the insulating bag belt and the insulating glue are seriously expanded and the insulating fastener is seriously cracked, deformed and displaced, and the two multifunctional compound eye detection devices are respectively and electrically connected with the control device so as to transmit monitoring signals of all miniature probes to the control device in real time.
Further, the control device judges according to the real-time detection signal of the multifunctional compound eye detection device, when the high-voltage cable oil-filled terminal is found to have different types of faults and different fault development degrees, corresponding protection actions are rapidly and accurately executed, the protection actions comprise sending out early warning signals of different degrees and sudden malignant fault tripping protection based on anti-misoperation tripping judgment, and the method specifically comprises the following steps: 1) when a miniature infrared probe of any compound eye array detects that the temperature of the electric power high-voltage equipment reaches a corresponding overheating fault setting threshold value, an early warning signal of a corresponding overheating fault degree is sent out; 2) and only when the temperature of the same part of the same electric power high-voltage equipment detected by each miniature infrared probe of two different compound eye arrays reaches a sudden vicious fault tripping action set threshold value, a tripping protection loop is started to control a corresponding switch to trip so as to isolate the equipment with sudden vicious overheating faults and prevent the fault range from further expanding.
Further, the control device judges according to the real-time detection signal of the multifunctional compound eye detection device, when the high-voltage cable oil-filled terminal is found to have different types of faults and different fault development degrees, corresponding protection actions are rapidly and accurately executed, the protection actions comprise sending out early warning signals of different degrees and sudden malignant fault tripping protection based on anti-misoperation tripping judgment, and the method specifically comprises the following steps: 1) when a miniature infrared probe of any compound eye array detects that the temperature of the electric power high-voltage equipment reaches a corresponding overheating fault setting threshold value, an early warning signal of a corresponding overheating fault degree is sent out; 2) and only when the temperature of the same part of the same electric power high-voltage equipment detected by each miniature infrared probe of two different compound eye arrays reaches a sudden vicious fault tripping action set threshold value, a tripping protection loop is started to control a corresponding switch to trip so as to isolate the equipment with sudden vicious overheating faults and prevent the fault range from further expanding.
Furthermore, each miniature probe in the multifunctional compound eye detection device is set to be different in focal length, aperture and depth of field, so that within the respective wavelength range, the miniature probe can be used for observing the condition of the high-voltage cable oil-filled terminal in a wide-angle and comprehensive mode, the focusing probe can be used for amplifying local details of each position, and the miniature probes with different apertures and depth of field changes are used for achieving comprehensive monitoring in multiple dimensions and transmitting monitoring signals to the control device in real time.
Furthermore, the two high-voltage cable oil-filling terminals are respectively installed on the two equipment supporting rods, and the multifunctional compound eye detection device is respectively installed beside the corresponding equipment supporting rods through the installation support so as to detect the working state of the corresponding cable oil-filling terminal.
Furthermore, the high-voltage cable oil-filling terminal comprises an insulating wrapping tape, insulating glue, insulating oil, a wire outgoing rod, a stress cone, an upper sealing gland group, a lower sealing gland group, a high-strength insulating porcelain bushing, a supporting insulator and a wire outgoing hardware fitting, wherein the upper sealing gland group and the lower sealing gland group are respectively connected with the upper end and the lower end of the high-strength insulating porcelain bushing, the supporting insulator is arranged on the periphery of the lower sealing gland group, a 220kV high-voltage cable penetrates into a hollow cavity of the high-strength insulating porcelain bushing from the lower end of the lower sealing gland group and is connected with the wire outgoing rod and the stress cone, the wire outgoing rod is upwards connected with the hardware fitting wire outgoing, and the wire outgoing hardware fitting penetrates out of the upper end of the upper sealing gland group and is electrically connected with a high-voltage wire so as to be connected with the primary input; an insulating wrapping tape and insulating glue are wrapped outside the connecting position of the 220kV high-voltage cable and the outlet rod, and insulating oil is filled in a hollow cavity of the high-strength insulating porcelain bushing.
Further, the control device comprises a data processing unit and a control execution unit, the data processing unit processes monitoring signal data sent by each miniature probe to obtain corresponding monitoring data, and the data processing unit is preset with the following protection setting values: 1) protecting and setting a temperature of sudden malignant heating fault of a cable oil filling terminal; 2) comparing series atlas protection setting values with an image of sudden malignant discharge fault discharge of a cable oil charging terminal; 3) comparing and protecting a setting value of external serious oil leakage and oil injection series maps; 4) the cable oil filling terminal bursts an X-ray series contrast map protection setting value which is seriously deformed due to internal malignant faults; the data processing unit compares the monitoring data obtained by each miniature probe with the corresponding protection setting value, and when each monitoring data exceeds the corresponding protection setting value, the control execution unit quickly trips the high-voltage circuit breaker to cut off the power supply, so that the 220kV high-voltage cable with a cable oil-filled terminal having a malignant fault is isolated from a power grid.
Furthermore, the output end of the multifunctional compound eye detection device is electrically connected with the input end of a data processing unit of the control device, the output end of the data processing unit is connected with the input end of the control execution unit, the output end of the control execution unit is electrically connected with a secondary control tripping circuit of the high-voltage circuit breaker, the primary working state of opening or closing of the high-voltage circuit breaker is controlled by the secondary control tripping circuit, and the secondary control tripping circuit controls the operation mechanism of the high-voltage circuit breaker to act according to an instruction sent by the control execution unit, so that the moving contact of the circuit breaker is rapidly separated from the state of close contact with the fixed contact, and the power supply is cut off.
Compared with the prior art, the invention has the following beneficial effects: the invention designs a multifunctional compound eye detection device consisting of a plurality of micro infrared probes, micro high-definition visible light probes and micro X-ray probes for monitoring and protecting a cable oil filling terminal aiming at the structure, the operation mode and the self characteristics of the 220kV high-voltage cable oil filling terminal, and the device can accurately monitor the equipment overheating and the discharging faults of the 220kV high-voltage cable oil filling terminal in a multi-dimensional online, real-time and real-time manner, including the perspective observation of the internal faults, thereby timely warning the hidden trouble and achieving the purpose of effectively preventing and avoiding the fault development of the 220kV high-voltage cable oil filling terminal.
Drawings
Fig. 1 is a schematic structural diagram of an apparatus according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a high voltage cable oil-filled terminal in an embodiment of the invention.
Fig. 3 is a schematic view of an internal fault condition of a high voltage cable oil fill terminal in an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a multifunctional compound eye detection device in an embodiment of the present invention.
Fig. 5 is a control schematic diagram of an apparatus according to an embodiment of the present invention.
In the figure: 1-a high voltage circuit breaker; 2-a first high voltage cable oil fill terminal; 3-a first multifunctional compound eye detection device; 4-220kV high-voltage cable; 5-a second high voltage cable oil fill terminal; 6-a second multifunctional compound eye detection device; 7-a support insulator; 8-lower sealing gland group; 9-insulating wrapping tape and insulating glue; 10-a stress cone; 11-high-strength insulating porcelain bushing; 12-insulating oil; 13-a wire outlet rod; 14-upper sealing gland group; 15-wire outlet hardware; 16-a device support bar; 17-a miniature infrared probe; 18-a miniature high-definition visible light probe; 19-miniature X-ray probe.
Detailed Description
The invention is described in further detail below with reference to the figures and the embodiments.
As shown in figure 1, the invention provides an automatic protection device for a high-voltage cable oil filling terminal, which comprises two high-voltage cable oil filling terminals, two multifunctional compound eye detection devices, a high-voltage circuit breaker and a control device, the high-voltage circuit breaker is used for connecting a power supply side and controlling the on-off of a 220kV high-voltage cable, the high-voltage cable oil-filled terminal is used for protecting and supporting the connection, transition and conversion of the 220kV high-voltage cable, the primary input end of the high-voltage circuit breaker is electrically connected to the power supply side through a high-voltage wire, the primary output end of the high-voltage circuit breaker is electrically connected to the wire outlet hardware fitting of the first high-voltage cable oil-filling terminal through the high-voltage wire, the first high-voltage cable oil-filled terminal is electrically connected with the second high-voltage cable oil-filled terminal through a 220kV high-voltage cable, and the wire outlet hardware fitting of the second high-voltage cable oil-filled terminal is electrically connected to the user load side through a high-voltage wire. As shown in fig. 4, the multi-functional compound eye detection device comprises a plurality of micro infrared probes, micro high-definition visible light probes and micro X-ray probes, wherein the three micro infrared probes are arranged at intervals to form a compound eye structure to form the multi-functional compound eye detection device, the two multi-functional compound eye detection devices are respectively installed at proper positions beside corresponding high-voltage cable oil-filled terminals to detect relevant working states of the high-voltage cable oil-filled terminals, the micro infrared probes are used for detecting sudden malignant heating faults in the operation of the high-voltage cable oil-filled terminals, the micro high-definition visible light probes are used for detecting sudden malignant discharge faults and serious oil leakage in the operation of the high-voltage cable oil-filled terminals, including oil spraying and other malignant faults, the micro X-ray probes are used for detecting faults of internal components of the high-voltage cable oil-filled terminals, including internal insulation wrapping tapes, insulation glue and insulation fasteners, which generate a large amount of chemical reactions due, the multifunctional compound eye detection device comprises an insulating bag belt, insulating glue, an insulating fastener, two multifunctional compound eye detection devices and a control device, wherein the insulating bag belt and the insulating glue are seriously expanded and the insulating fastener is seriously cracked, deformed and displaced, and the two multifunctional compound eye detection devices are respectively and electrically connected with the control device so as to transmit monitoring signals of all miniature probes to the control device in real time.
In this embodiment, the control device determines according to the real-time detection signal of the multi-functional compound eye detection device, and when finding that the high-voltage cable oil-filled terminal has different types of faults and is in different fault development degrees, the control device rapidly and accurately executes corresponding protection actions, and the protection actions include sending out early warning signals of different degrees and sudden malignant fault trip protection based on the anti-error trip determination, specifically: 1) when a miniature infrared probe of any compound eye array detects that the temperature of the electric power high-voltage equipment reaches a corresponding overheating fault setting threshold value, an early warning signal of a corresponding overheating fault degree is sent out; 2) when the micro infrared probes of two different compound eye arrays detect that the temperature of the same part of the same electric power high-voltage equipment reaches the sudden malignant fault tripping action set threshold value, the tripping protection loop is started to control the corresponding switch to trip so as to isolate the equipment with the sudden malignant overheating fault, the fault range is prevented from being further expanded, the protection misoperation is avoided, the switching tripping protection action can be accurately and rapidly executed when the equipment really has the sudden malignant fault, and the safe operation of the power grid is powerfully guaranteed.
In this embodiment, the two high-voltage cable oil-filled terminals are respectively installed on the two equipment support rods, and the multifunctional compound eye detection device is respectively installed beside the corresponding equipment support rod through the installation support to detect the working state of the corresponding cable oil-filled terminal. Every miniature probe among the multi-functional compound eye detection device sets up to different focal length, diaphragm and depth of field to in its respective wavelength range, possess height simultaneously respectively, clear, far observation function, there is the miniature probe of wide angle comprehensive observation high-tension cable oil charge terminal condition in respective wavelength range promptly, have the focusing probe that amplifies to each local detail again, there is the miniature probe of different diaphragm and depth of field change in addition, reach the comprehensive monitoring of multidimension degree, and give controlling means with monitoring signal real-time transmission.
As shown in fig. 2, the high-voltage cable oil-filling terminal includes an insulating wrapping tape, an insulating glue, an insulating oil, a wire outgoing rod, a stress cone, an upper sealing gland group, a lower sealing gland group, a high-strength insulating porcelain bushing, a supporting insulator and a wire outgoing hardware, wherein the upper sealing gland group and the lower sealing gland group are respectively connected with the upper end and the lower end of the high-strength insulating porcelain bushing, the supporting insulator is arranged on the periphery of the lower sealing gland group, a 220kV high-voltage cable penetrates into a hollow cavity of the high-strength insulating porcelain bushing from the lower end of the lower sealing gland group and is connected with the wire outgoing rod and the stress cone, the wire outgoing rod is upwards connected with the wire outgoing hardware, and the wire outgoing hardware penetrates out from the upper end of the upper sealing gland group and is electrically connected with a high-voltage wire so as to be connected with; an insulating wrapping tape and insulating glue are wrapped outside the connecting position of the 220kV high-voltage cable and the outlet rod, and insulating oil is filled in a hollow cavity of the high-strength insulating porcelain bushing.
As shown in fig. 5, the control device includes a data processing unit and a control execution unit, the data processing unit processes the monitoring signal data sent by each micro probe to obtain corresponding monitoring data, and the data processing unit is preset with the following protection setting values: 1) protecting and setting a temperature of sudden malignant heating fault of a cable oil filling terminal; 2) comparing series atlas protection setting values with an image of sudden malignant discharge fault discharge of a cable oil charging terminal; 3) comparing and protecting a setting value of external serious oil leakage and oil injection series maps; 4) the cable oil filling terminal bursts an X-ray series contrast map protection setting value which is seriously deformed due to internal malignant faults; the data processing unit compares the monitoring data obtained by each miniature probe with the corresponding protection setting value, and when each monitoring data exceeds the corresponding protection setting value, the control execution unit quickly trips and cuts off the power of the high-voltage circuit breaker to isolate the 220kV high-voltage cable with a cable oil-filled terminal having a malignant fault from a power grid, so that the accident is prevented from being enlarged, and meanwhile, the safety of workers and high-voltage cable equipment is protected.
The output end of the multifunctional compound eye detection device is electrically connected with the input end of a data processing unit of the control device, the output end of the data processing unit is connected with the input end of the control execution unit, the output end of the control execution unit is electrically connected with a secondary control tripping circuit of the high-voltage circuit breaker, the primary working state of opening or closing of the high-voltage circuit breaker is controlled by the secondary control tripping circuit, and the secondary control tripping circuit controls the operation mechanism of the high-voltage circuit breaker to act according to an instruction sent by the control execution unit, so that a moving contact of the circuit breaker is rapidly separated from a state of being in close contact with a fixed contact, and a power supply is cut.
The automatic protection device for the oil charging terminal of the high-voltage cable is realized and works as follows:
1) the data processing unit is pre-programmed:
a. setting a malignant heating temperature fault trip protection program and a setting value of a high-voltage cable oil filling terminal;
b. setting various standard maps of malignant discharge fault series to compare with trip protection programs and setting values, wherein the standard maps comprise arc light images in various shapes and the like;
c. setting a tripping protection program and a setting value for comparing leakage oil injection series images of the high-voltage cable oil filling terminal;
d. setting an X-ray series standard map comparison tripping protection program and setting values for the condition that the internal components of the oil-filled cable terminal are suddenly deformed seriously due to internal malignant faults.
2) The multifunctional compound eye detection device is arranged at a proper position of a terminal for monitoring the oil filling of the high-voltage cable, and is kept at a sufficient safe distance from a 220kV high-voltage part.
3) And opening the on-line automatic protection device of the high-voltage cable oil filling terminal.
4) When the micro infrared probe group of the multifunctional compound eye detection device monitors that the temperature of the high-voltage cable oil-filling terminal reaches a malignant heating fault temperature tripping protection program, the automatic protection device controls the tripping of the breaker through the action of a secondary tripping loop of the breaker, cuts off a power supply and isolates the 220kV power high-voltage cable of the cable oil-filling terminal with the malignant heating fault from a power grid.
5) When the miniature visible light high-definition probe group of the multifunctional compound eye detection device monitors the discharge phenomenon of malignant discharge fault of the high-voltage cable oil-filled terminal, the automatic protection device controls the circuit breaker to trip through the action of the secondary trip circuit of the circuit breaker, cuts off the power supply and isolates the 220kV power high-voltage cable of the cable oil-filled terminal with the malignant discharge fault from the power grid.
6) When the micro visible light high-definition probe group of the multifunctional compound eye detection device monitors that the high-voltage cable oil filling terminal has a serious oil leakage and injection phenomenon, the automatic protection device controls the tripping of the circuit breaker through the action of the secondary tripping circuit of the circuit breaker, cuts off the power supply and isolates the 220kV power high-voltage cable of the cable oil filling terminal which has the oil leakage and injection phenomenon from a power grid.
7) When the micro X-ray probe group of the multifunctional compound eye detection device monitors that the internal component burst of the high-voltage cable oil-filled terminal is caused by the serious deformation condition caused by the internal malignant fault, the automatic protection device controls the tripping of the circuit breaker through the secondary tripping circuit action of the circuit breaker, cuts off the power supply, and isolates the 220kV power high-voltage cable of the cable oil-filled terminal, which has the phenomenon that the internal component burst is caused by the internal malignant fault and the serious deformation condition is caused, from the power grid.
The above are preferred embodiments of the present invention, and all changes made according to the technical scheme of the present invention that produce functional effects do not exceed the scope of the technical scheme of the present invention belong to the protection scope of the present invention.
Claims (7)
1. An automatic protection device for a high-voltage cable oil filling terminal is characterized by comprising two high-voltage cable oil filling terminals, two sets of multifunctional compound eye detection devices, a high-voltage circuit breaker and a control device, the high-voltage circuit breaker is used for connecting a power supply side and controlling the on-off of a 220kV high-voltage cable, the high-voltage cable oil-filled terminal is used for protecting and supporting the connection, transition and conversion of the 220kV high-voltage cable, the primary input end of the high-voltage circuit breaker is electrically connected to the power supply side through a high-voltage wire, the primary output end of the high-voltage circuit breaker is electrically connected to the wire outlet hardware fitting of the first high-voltage cable oil-filling terminal through the high-voltage wire, the first high-voltage cable oil-filled terminal is electrically connected with the second high-voltage cable oil-filled terminal through a 220kV high-voltage cable, and an outlet hardware fitting of the second high-voltage cable oil-filled terminal is electrically connected to a user load side through a high-voltage wire; the multifunctional compound eye detection device comprises a plurality of miniature infrared probes, miniature high-definition visible light probes and miniature X-ray probes, wherein the three miniature probes are arranged at intervals to form a compound eye structure to form the multifunctional compound eye detection device, the two multifunctional compound eye detection devices are respectively arranged at proper positions beside corresponding high-voltage cable oil filling terminals to detect the relevant working states of the high-voltage cable oil filling terminals, the miniature infrared probes are used for detecting sudden malignant heating faults in the operation of the high-voltage cable oil filling terminals, the miniature high-definition visible light probes are used for detecting sudden malignant discharge faults and serious oil leakage in the operation of the high-voltage cable oil filling terminals, the miniature X-ray probes are used for detecting the faults of internal components of the high-voltage cable oil filling terminals, and the multifunctional compound eye detection device comprises an internal insulation wrapping tape, insulation glue and an insulation fastener which generate a large number of chemical reactions due to the serious degradation of internal, the multifunctional compound eye detection device comprises an insulating bag belt, insulating glue, an insulating fastener, two multifunctional compound eye detection devices and a control device, wherein the insulating bag belt and the insulating glue are seriously expanded and the insulating fastener is seriously cracked, deformed and displaced, and the two multifunctional compound eye detection devices are respectively and electrically connected with the control device so as to transmit monitoring signals of all miniature probes to the control device in real time.
2. The automatic protection device for the high-voltage cable oil-filling terminal according to claim 1, wherein the control device performs judgment according to real-time detection signals of the multifunctional compound eye detection device, and when different types of faults and different fault development degrees of the high-voltage cable oil-filling terminal are found, corresponding protection actions are rapidly and accurately performed, and the protection actions include sending out early warning signals of different degrees and sudden malignant fault trip protection based on anti-error trip judgment, and specifically include: 1) when a miniature infrared probe of any compound eye array detects that the temperature of the electric power high-voltage equipment reaches a corresponding overheating fault setting threshold value, an early warning signal of a corresponding overheating fault degree is sent out; 2) and only when the temperature of the same part of the same electric power high-voltage equipment detected by each miniature infrared probe of two different compound eye arrays reaches a sudden vicious fault tripping action set threshold value, a tripping protection loop is started to control a corresponding switch to trip so as to isolate the equipment with sudden vicious overheating faults and prevent the fault range from further expanding.
3. The automatic protection device for the high-voltage cable oil-filling terminal according to claim 1, wherein each micro probe in the multifunctional compound eye detection device is set to have different focal lengths, apertures and depths of field, so that within the respective wavelength range, the micro probe has a wide angle for comprehensively observing the conditions of the high-voltage cable oil-filling terminal, a focusing probe for amplifying local details at each position, and micro probes with different apertures and depths of field, thereby achieving comprehensive monitoring in multiple dimensions, and transmitting monitoring signals to the control device in real time.
4. The automatic protection device for the oil filling terminal of the high-voltage cable according to claim 1, wherein the two high-voltage cable oil filling terminals are respectively installed on two equipment support rods, and the multifunctional compound eye detection device is respectively installed beside the corresponding equipment support rod through the installation bracket to detect the working state of the corresponding cable oil filling terminal.
5. The automatic protection device for the oil-filled terminal of a high-voltage cable according to claim 1, the high-voltage cable oil-filling terminal comprises an insulating wrapping tape, insulating glue, insulating oil, a wire outlet rod, a stress cone, an upper sealing gland group, a lower sealing gland group, a high-strength insulating porcelain bushing, a supporting insulator and a wire outlet hardware fitting, the upper sealing gland group and the lower sealing gland group are respectively connected with the upper end and the lower end of the high-strength insulating porcelain bushing, the supporting insulator is arranged on the peripheral part of the lower sealing gland group, a 220kV high-voltage cable penetrates into a hollow cavity of the high-strength insulating porcelain bushing from the lower end of the lower sealing gland group, the outlet rod is upwards connected with an outlet fitting, and the outlet fitting penetrates out of the upper end of the upper sealing gland group and is electrically connected with a high-voltage lead so as to be connected to a primary input end or a user load side of the high-voltage circuit breaker; an insulating wrapping tape and insulating glue are wrapped outside the connecting position of the 220kV high-voltage cable and the outlet rod, and insulating oil is filled in a hollow cavity of the high-strength insulating porcelain bushing.
6. The automatic protection device for the oil-filled terminal of the high-voltage cable according to claim 1, wherein the control device comprises a data processing unit and a control execution unit, the data processing unit processes monitoring signal data sent by each micro probe to obtain corresponding monitoring data, and the data processing unit is preset with the following protection setting values: 1) protecting and setting a temperature of sudden malignant heating fault of a cable oil filling terminal; 2) comparing series atlas protection setting values with an image of sudden malignant discharge fault discharge of a cable oil charging terminal; 3) comparing and protecting a setting value of external serious oil leakage and oil injection series maps; 4) the cable oil filling terminal bursts an X-ray series contrast map protection setting value which is seriously deformed due to internal malignant faults; the data processing unit compares the monitoring data obtained by each miniature probe with the corresponding protection setting value, and when each monitoring data exceeds the corresponding protection setting value, the control execution unit quickly trips the high-voltage circuit breaker to cut off the power supply, so that the 220kV high-voltage cable with a cable oil-filled terminal having a malignant fault is isolated from a power grid.
7. The automatic protection device for the oil charging terminal of the high-voltage cable according to claim 6, wherein the output end of the multifunctional compound eye detection device is electrically connected with the input end of the data processing unit of the control device, the output end of the data processing unit is connected with the input end of the control execution unit, the output end of the control execution unit is electrically connected with the secondary control trip circuit of the high-voltage circuit breaker, the primary working state of the high-voltage circuit breaker in opening or closing is controlled by the secondary control trip circuit, and the secondary control trip circuit controls the operation mechanism of the high-voltage circuit breaker according to the instruction sent by the control execution unit, so that the moving contact of the circuit breaker is rapidly separated from the state of being in close contact with the fixed contact, thereby disconnecting the power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011413634.1A CN112505507A (en) | 2020-12-07 | 2020-12-07 | Automatic protection device for oil-filled terminal of high-voltage cable |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011413634.1A CN112505507A (en) | 2020-12-07 | 2020-12-07 | Automatic protection device for oil-filled terminal of high-voltage cable |
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| CN112505507A true CN112505507A (en) | 2021-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011413634.1A Pending CN112505507A (en) | 2020-12-07 | 2020-12-07 | Automatic protection device for oil-filled terminal of high-voltage cable |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113449767A (en) * | 2021-04-29 | 2021-09-28 | 国网浙江省电力有限公司嘉兴供电公司 | Multi-image fusion transformer substation equipment abnormity identification and positioning method |
-
2020
- 2020-12-07 CN CN202011413634.1A patent/CN112505507A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113449767A (en) * | 2021-04-29 | 2021-09-28 | 国网浙江省电力有限公司嘉兴供电公司 | Multi-image fusion transformer substation equipment abnormity identification and positioning method |
| CN113449767B (en) * | 2021-04-29 | 2022-05-17 | 国网浙江省电力有限公司嘉兴供电公司 | Multi-image fusion transformer substation equipment abnormity identification and positioning method |
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