CN115128388A - Rail transit power supply equipment fault analysis system - Google Patents
Rail transit power supply equipment fault analysis system Download PDFInfo
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- CN115128388A CN115128388A CN202211050057.3A CN202211050057A CN115128388A CN 115128388 A CN115128388 A CN 115128388A CN 202211050057 A CN202211050057 A CN 202211050057A CN 115128388 A CN115128388 A CN 115128388A
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- 238000004458 analytical method Methods 0.000 title claims abstract description 51
- 239000004020 conductor Substances 0.000 claims abstract description 80
- 238000012544 monitoring process Methods 0.000 claims abstract description 61
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 37
- 229910002091 carbon monoxide Inorganic materials 0.000 claims abstract description 37
- 238000004088 simulation Methods 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 8
- 230000000007 visual effect Effects 0.000 claims abstract description 7
- 238000012545 processing Methods 0.000 claims description 32
- 238000004891 communication Methods 0.000 claims description 26
- 238000010191 image analysis Methods 0.000 claims description 24
- 238000001514 detection method Methods 0.000 claims description 4
- 238000010891 electric arc Methods 0.000 abstract description 23
- 230000002159 abnormal effect Effects 0.000 abstract description 6
- 238000007689 inspection Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
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- 230000002265 prevention Effects 0.000 description 1
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- 230000000391 smoking effect Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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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
- G01R31/005—Testing of electric installations on transport means
- G01R31/008—Testing of electric installations on transport means on air- or spacecraft, railway rolling stock or sea-going vessels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L1/00—Devices along the route controlled by interaction with the vehicle or train
- B61L1/20—Safety arrangements for preventing or indicating malfunction of the device, e.g. by leakage current, by lightning
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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
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Abstract
The utility model provides a rail transit power supply unit fault analysis system, relates to power supply unit fault analysis technical field, and the bare conductor point of track transit power supply unit electrical part is drawn together to the monitoring module of voltage and current, electric arc monitoring module and fault simulation analysis module, the monitoring module of voltage and current includes a set of electric quantity changer and a set of AD converter, the bare conductor point is inserted respectively to the input of a set of electric quantity changer. The judgment of the fault arc depends on the comprehensive judgment of visual identification and gas identification, only when the naked conductor point is monitored to simultaneously have an arc picture, carbon monoxide exceeding a carbon monoxide concentration threshold value and a temperature value exceeding a temperature threshold value, the naked conductor point is automatically judged to have the fault arc, an alarm and fault point information are sent, and a worker can manually process the fault in time according to the fault information, so that the power supply fault caused by the fault arc, abnormal voltage or current is prevented from further expanding.
Description
Technical Field
The invention relates to the technical field of power supply equipment fault analysis, in particular to a fault analysis system for rail transit power supply equipment.
Background
Rail transit refers to a type of vehicle or transportation system in which operating vehicles need to travel on a particular rail. The most typical rail transit is a railway system consisting of conventional trains and standard railways. With the diversified development of train and railway technologies, rail transit is more and more types, and is not only distributed in long-distance land transportation, but also widely applied to medium-short distance urban public transportation.
At present, urban rail transit is an important link of urban public transport, but subway rail transit in various places frequently breaks down, most types of faults are power supply faults, for example, a shutdown phenomenon caused by power supply faults occurs on the No. 1 subway line of 2011.11.12 Shanghai, obvious abnormal sound and smoking conditions appear according to the reflection of passengers, the handling mode at that time is emergency shutdown, passengers are conveyed emergently, and fortunately, larger accidents do not occur.
The urban rail transit power supply system is a system for providing required electric energy for urban rail transit operation, not only provides traction power for an urban rail transit electric train, but also provides electric energy for other facilities of the urban rail transit operation service, such as lighting, ventilation, air conditioning, water supply and drainage, communication, signals, disaster prevention alarm, escalators and the like, and has the characteristics of safety, reliability, advanced technology, complete functions, convenience in scheduling, economy, reasonableness and the like.
In the operation of urban rail transit, once the power supply is interrupted, the breakdown of an urban rail transit transportation system can be caused, and the life and property safety of passengers can be endangered. Therefore, the highly safe, reliable, economical and reasonable power supply is an important guarantee and precondition for the normal operation of urban rail transit.
The power load of urban rail transit can be divided into two power utilization groups according to different functions.
The traction load is required by the running of the electric motor coach;
second, the power consumption for power lighting required by other buildings such as stations, sections, vehicle sections, and control centers, such as: ventilators, air conditioners, escalators, elevators, water pumps, lighting, AFC systems, FAS, BAS, communication systems, signaling systems, etc.
Because the electric motor coach generally adopts the mode of pantograph or third rail power supply to supply power, the power supply is carried out under the dynamic condition, and the stability of the power supply is far inferior to the static direct-connection power supply.
The stability of the rail transit safety monitoring system can be influenced by various aspects such as the motion state of a vehicle body and the environment, if power supply fault hidden dangers cannot be found timely, the hidden dangers can cause power supply faults in specific time or specific states, power failure is represented representatively, combustion and fire are more severe, and great risks can be caused to rail transit safety regardless of the representation.
At present, the existing rail transit fault analysis is mainly realized by daily inspection of key components, the main point of the inspection is bare conductor points of electric devices of rail transit power supply equipment, the probability of faults of the bare conductors is far greater than that of other areas wrapped by thick insulating layers due to direct contact with air, however, the bare conductor points cannot be avoided, for example, contact positions of a pantograph or an electric bus and a third rail and a plurality of connecting terminals in an electric cabinet have a large number of bare conductors;
the inspection is mainly performed in a static state, and some tiny hidden dangers of abnormal states cannot be found, and the hidden dangers can cause power supply faults in extreme cases.
The bare conductor point generates an arc, which is a gas ionization discharge phenomenon and is also a plasma. The current in the arc is microscopically the result of the movement of electrons and positive ions under the influence of an electric field, wherein the movement of electrons constitutes the major part of the current. Arcs are characterized by high temperatures, low currents, short durations, and frequent breakthroughs. When the arc is generated, a large amount of heat is released, and surrounding flammable and explosive materials can be ignited, so that fire and even explosion can be caused. The electric arcs on the line can be divided into two types, one is a normal operation arc and is called a 'good arc'; the other is a fault arc, called a 'broken arc'. "good arc" refers to an arc generated by the rotation of an electric motor (e.g., a drill, a vacuum cleaner, etc.). Of course, the arc generated when people switch on or off the electrical appliance and plug in or out the electrical appliance also belongs to 'good arc'. The 'bad arc' is the fault arc, so how to find the existence and the existence point of the fault arc in time is the important point of the fault monitoring of the rail transit power supply equipment.
Disclosure of Invention
The invention provides a fault analysis system for rail transit power supply equipment, aiming at solving the problems that the existing rail transit fault analysis is mainly realized by daily inspection of key components, the inspection is mainly carried out in a static state, and the fault arc in operation cannot be found in time. The following technical scheme is adopted:
a rail transit power supply equipment fault analysis system comprises a bare conductor point of a rail transit power supply equipment electric device, and comprises a voltage and current monitoring module, an arc monitoring module and a fault simulation analysis module, wherein the voltage and current monitoring module comprises a group of electric quantity transmitters and a group of A/D converters, the input ends of the group of electric quantity transmitters are respectively connected to the bare conductor point, the A/D converters are electrically connected with an analog quantity output port of the electric quantity transmitters, the arc monitoring module judges whether the bare conductor point generates a fault arc or not by adopting a visual and gas detection combined mode, marks the fault arc point and transmits the judgment result and the mark to the fault simulation analysis module, the fault simulation analysis module is provided with a display screen, a central control chip and an alarm for fault analysis and display control, and the group of A/D converters are respectively in communication and electric connection with the central control chip, the arc monitoring module is in communication and electric connection with the central control chip, and the central control chip is in communication and electric connection with the display screen and controls the switch of the alarm.
Through the technical scheme, most faults of the rail transit power supply equipment are originated from bare conductor points which are positioned at the connecting part of the electric bus and a transmission line at the top or the bottom, and a plurality of wiring terminals in the electric cabinet are provided with a large number of bare conductor points, so that the fault monitoring of the rail transit power supply equipment only needs to carry out key monitoring on the bare conductor points, an electric quantity transmitter of a voltage and current monitoring module monitors the voltage value and the current value of the bare conductor points in real time to measure and transmit the measured values to a fault simulation analysis module, an electric arc monitoring module monitors whether fault electric arcs exist in the bare conductor points in real time, the fault electric arcs are judged by means of comprehensive judgment of visual identification and gas identification, when the electric arc monitoring module judges that the fault electric arcs exist in the bare conductor points, the electric arc monitoring module marks the bare conductor points, and transmits signals and marks existing in the fault electric arcs to a central control chip of the fault simulation analysis module in real time, the central control chip correspondingly displays the fault information on the display screen, and simultaneously controls the alarm to start alarming, so that the staff can find the fault information in time and process the fault information after acquiring the information of the relevant fault point from the display screen, and further expansion of faults caused by fault electric arcs, abnormal voltages and currents is avoided.
Optionally, the arc monitoring module includes arc spark monitoring unit based on vision, arc accompanying gas monitoring unit and trouble electric arc and judges the chip, arc spark monitoring unit includes a set of camera, image analysis processing module and switching value output module, and a set of camera sets up the one side at each naked conductor point through the support respectively to signal input part communication electricity through the communication line respectively with image analysis processing module is connected, image analysis processing module passes through switching value output module and judges the chip communication electricity with trouble electric arc and be connected, arc accompanying gas monitoring unit includes carbon monoxide sensor and infrared temperature sensor, carbon monoxide sensor and infrared temperature sensor judge chip communication connection with trouble electric arc respectively, trouble electric arc judges chip and well accuse chip communication connection.
Through the technical scheme, the camera shoots the video picture of naked conductor point in real time, when the naked conductor takes place electric arc, image analysis processing module discerns this electric arc, and judge the switching value that the chip sent the representative electric arc to the trouble electric arc through switching value output module, carbon monoxide sensor gathers the carbon monoxide concentration of this department in real time simultaneously, infrared temperature sensor gathers the temperature on naked conductor point surface, when carbon monoxide concentration and the temperature value on naked conductor point surface all reach the setting value, judge that the electric arc of this naked conductor point is trouble electric arc, then trouble electric arc judges that the chip gives the central control chip with the signal real-time transmission that this naked conductor point appears trouble electric arc.
Optionally, the image output interface of the image analysis processing module is connected to the display screen of the fault simulation analysis module through a video line.
Through the technical scheme, the display screen can acquire real-time pictures shot by the camera near the bare conductor point in real time, and the pictures are more convenient to transmit after being compressed by the image analysis processing module.
Optionally, when the image analysis processing module analyzes that the bare conductor point has the arc picture, the switching value output module sends a set switching value to the fault arc determination chip, the fault arc determination chip determines whether the concentration of the point reaches a set carbon monoxide concentration threshold value or not by comparing carbon monoxide sensors at the same time, and simultaneously determines whether the temperature of the point reaches the set temperature threshold value or not by the infrared temperature sensor, and if the two are met, the fault arc determination chip sends the bare conductor point to the central control chip to be in a fault arc state.
Through above-mentioned technical scheme, only have high concentration carbon monoxide simultaneously, and cause the bare conductor point to generate heat, just can judge the electric arc of this department and be the fault arc, avoid to some normal operation electric arcs misjudgement for the artifical waste that the fault arc leads to.
Optionally, the threshold carbon monoxide concentration is 300 milligrams per cubic meter.
Through the technical scheme, carbon monoxide is generated in general arc generation, but the amount of the generated carbon monoxide is far larger than that of an operating arc when a fault arc is generated, so that a carbon monoxide concentration threshold value is set, and the operating arc can be distinguished.
Optionally, the temperature threshold is 500 ℃.
Through the technical scheme, the electric arc is generated along with heating, however, the temperature of a bare conductor point cannot be heated to be high due to the short duration of the normal operation electric arc, and therefore, a temperature threshold value is set, and the operation electric arc can be distinguished.
Optionally, the central control chip is a GD32E230 series MCU.
By the technical scheme, the GD32E230 series MCU is an MCU with prominent comprehensive performance in the industrial control industry, and can realize the functions of controlling the display content of the display, marking faults, processing digital streams, processing words and the like.
Optionally, the image analysis processing module is a keyence vision recognition module.
Through the technical scheme, the kirschner vision identification module can realize the identification of the appointed target picture of the vision acquisition picture and the output of the identification result, and can realize the input of multiple paths of video signals and the respective identification processing of multiple paths.
Optionally, the fault arc determination chip is a wara HC32F4a0 series MCU.
Through the technical scheme, the Huada HC32F4A0 series MCU can efficiently realize the processing of the digital stream.
Optionally, the operation process of the fault simulation analysis module is as follows:
the display screen is used for displaying fault monitoring frames matched with the number of bare conductor points in a simulated mode, the fault monitoring frames are displayed in a marked mode, a video area, a state display area and a physical position area are arranged in the fault monitoring frames, pictures shot by a camera are displayed in real time in the video area, the state display area displays the voltage and current values of the bare conductor points and displays whether fault arcs exist or not, and the physical position area displays the physical position information of the bare conductor points.
In summary, the present invention includes at least one of the following beneficial effects:
the invention can provide a fault analysis system for rail transit power supply equipment, the judgment of the fault arc depends on the comprehensive judgment of a voltage and current monitoring value, visual identification, gas identification and temperature detection, only when the existence of an arc picture, carbon monoxide exceeding a carbon monoxide concentration threshold value and a temperature value exceeding a temperature threshold value at the same time at a bare conductor point is monitored, the existence of the fault arc at the bare conductor point is automatically judged, an alarm and fault point information are sent, and a worker can manually process the fault in time according to the fault information, so that the power supply fault caused by the fault arc, abnormal voltage or current is prevented from further expanding, and the fault analysis system has good market popularization value.
Drawings
FIG. 1 is a schematic diagram of the electrical device connection principle of the present invention;
FIG. 2 is a schematic diagram of the electrical component connections of the arc monitoring module of the present invention;
FIG. 3 is a schematic diagram of the electrical device connections of the fault simulation analysis module of the present invention;
FIG. 4 is a schematic view of the display principle of the display screen of the fault simulation analysis module of the present invention;
description of reference numerals: 1. a voltage and current monitoring module; 2. an arc monitoring module; 211. a camera; 212. an image analysis processing module; 213. a switching value output module; 22. an electric arc associated gas monitoring unit; 221. a carbon monoxide sensor; 222. an infrared temperature sensor; 23. a fault arc determination chip; 3. a fault simulation analysis module; 31. a display screen; 311. a fault monitoring frame; 3111. a video zone; 3112. a status display area; 3113. a physical location area; 32. a central control chip; 33. an alarm; 10. a bare conductor point; 11. an electric quantity transmitter; 12. an A/D converter.
Detailed Description
The present invention is described in further detail below with reference to fig. 1-4.
The embodiment of the invention discloses a fault analysis system for rail transit power supply equipment.
Referring to fig. 1-4, a rail transit power supply equipment fault analysis system comprises a bare conductor point 10 of a rail transit power supply equipment electrical device, including a voltage and current monitoring module 1, an arc monitoring module 2 and a fault simulation analysis module 3, wherein the voltage and current monitoring module 1 includes a group of electric quantity transducers 11 and a group of a/D converters 12, the input ends of the group of electric quantity transducers 11 are respectively connected to the bare conductor point 10, the a/D converters 12 are electrically connected with an analog output port of the electric quantity transducers 11, the arc monitoring module 2 judges whether the bare conductor point 10 generates a fault arc by combining visual and gas detection, marks the fault arc point and transmits the judgment result and the mark to the fault simulation analysis module 3, the fault simulation analysis module 3 is provided with a display screen 31, a central control chip 32 and an alarm 33 for fault analysis and display control, the A/D converters 12 are respectively in communication and electrical connection with the central control chip 32, the arc monitoring module 2 is in communication and electrical connection with the central control chip 32, and the central control chip 32 is in communication and electrical connection with the display screen 31 and controls the on-off of the alarm 33.
As most faults of the rail transit power supply equipment come from the bare conductor points 10, the bare conductor points 10 are located at the connecting position of the electric bus and the top or bottom transmission line, and a large number of bare conductor points 10 exist at the positions of a plurality of wiring terminals in an electric cabinet, only the bare conductor points 10 need to be monitored in a key mode for fault monitoring of the rail transit power supply equipment, the electric quantity transmitter 11 of the voltage and current monitoring module 1 monitors the voltage value and the current value of the bare conductor points 10 in real time to measure and transmit the measured values to the fault simulation analysis module 3, meanwhile, the arc monitoring module 2 monitors whether fault arcs exist in the bare conductor points 10 in real time, the fault arcs are judged by comprehensive judgment of visual identification and gas identification, when the arc monitoring module 2 judges that fault arcs exist in the bare conductor points 10, the fault arcs are marked, and signals and marks of the existence of the fault arcs are transmitted to the central control core of the fault simulation analysis module 3 in real time The chip 32 and the central control chip 32 correspondingly display the fault information on the display screen 31, and simultaneously control the alarm 33 to start alarming, so that the working personnel can find the fault information in time, acquire information of related fault points from the display screen 31 and then process the information in time, and further expansion of faults caused by fault electric arcs, abnormal voltages and currents is avoided.
The arc monitoring module 2 comprises an arc spark monitoring unit based on vision, an arc accompanying gas monitoring unit 22 and a fault arc judging chip 23, the arc spark monitoring unit comprises a group of cameras 211, an image analysis processing module 212 and a switching value output module 213, the group of cameras 211 are respectively arranged at one side of each bare conductor point 10 through a bracket, and are respectively in communication and electrical connection with the signal input end of the image analysis processing module 212 through communication lines, the image analysis processing module 212 is electrically connected with the fault arc determination chip 23 through the switching value output module 213 in a communication manner, the arc associated gas monitoring unit 22 comprises a carbon monoxide sensor 221 and an infrared temperature sensor 222, the carbon monoxide sensor 221 and the infrared temperature sensor 222 are respectively connected with the fault arc determination chip 23 in a communication manner, and the fault arc determination chip 23 is connected with the central control chip 32 in a communication manner.
The camera 211 shoots a video picture of the bare conductor point 10 in real time, when the bare conductor point 10 is in an arc, the image analysis processing module 212 identifies the arc, and sends a switching value representing the arc to the fault arc determination chip 23 through the switching value output module 213, meanwhile, the carbon monoxide sensor 221 collects the carbon monoxide concentration at the point in real time, the infrared temperature sensor 222 collects the temperature of the surface of the bare conductor point 10, when the carbon monoxide concentration and the temperature value of the surface of the bare conductor point 10 reach set values, it is determined that the arc of the bare conductor point 10 is a fault arc, and the fault arc determination chip 23 transmits a signal of the fault arc of the bare conductor point 10 to the central control chip 32 in real time.
The image output interface of the image analysis processing module 212 is connected with the display screen 31 of the fault simulation analysis module 3 through a video line.
The display screen 31 can acquire real-time pictures shot by the camera 211 near the bare conductor point 10 in real time, and the pictures are compressed by the image analysis processing module 212 and then transmitted more conveniently.
When the image analysis processing module 212 analyzes that the arc picture exists in the bare conductor point 10, the switching value output module 213 sends a set switching value to the fault arc determination chip 23, the fault arc determination chip 23 determines whether the concentration of the fault arc point reaches a set carbon monoxide concentration threshold value or not by comparing the carbon monoxide sensor 221 at the same time, meanwhile, the infrared temperature sensor 222 determines whether the temperature of the fault arc point reaches a set temperature threshold value or not, and if the temperature of the fault arc point reaches the set temperature threshold value or not, the fault arc determination chip 23 sends the bare conductor point 10 to the central control chip 32 that the fault arc point is in a fault arc state.
Only if high-concentration carbon monoxide exists at the same time and the bare conductor point 10 is heated, the electric arc at the position can be judged to be a fault electric arc, and manual waste caused by misjudging some normal operation electric arcs as fault electric arcs is avoided.
The threshold carbon monoxide concentration is 300 milligrams per cubic meter.
Carbon monoxide is generated in general arc generation, but when a fault arc is generated, the generated amount of the carbon monoxide is far larger than that of an operating arc, so that a carbon monoxide concentration threshold value is set to be beneficial to distinguishing the operating arc.
The temperature threshold was 500 ℃.
The arc generation is accompanied by heating, whereas the normal operating arc, due to its short duration, does not heat the bare conductor point 10 to a high temperature, so that setting a temperature threshold is advantageous for distinguishing the operating arc.
The central control chip 32 is a GD32E230 series MCU.
The GD32E230 series MCU is an MCU with prominent comprehensive performance in the industrial control industry, and can realize the functions of controlling the display content of the display, marking faults, processing digital streams, processing words and the like.
The image analysis processing module 212 is a kirschner vision recognition module.
The kirschner vision identification module can realize the identification of the appointed target picture of the vision acquisition picture and the output of the identification result, and can realize the input of multiple paths of video signals and the respective identification processing of multiple paths.
The arc fault determination chip 23 is a huada HC32F4a0 series MCU.
The Huada HC32F4A0 series MCU can efficiently realize the processing of digital streams.
The operation process of the fault simulation analysis module 3 is as follows:
the display screen 31 is used for displaying the number of the fault monitoring frames 311 matched with the number of the bare conductor points 10 in an analog mode, the labels of the fault monitoring frames 311 are displayed, a video zone 3111, a state display zone 3112 and a physical position zone 3113 are arranged in the fault monitoring frames 311, the video zone 3111 displays pictures shot by the camera 211 in real time, the state display zone 3112 displays the voltage and current values at the bare conductor points 10 and displays whether fault arcs exist, and the physical position zone 3113 displays the physical position information of the bare conductor points 10.
The implementation principle of the fault analysis system of the rail transit power supply equipment in the embodiment of the invention is as follows:
the electric bus of a certain model adopts a pantograph mode to get electricity, a power carriage is arranged in the bus, a power distribution cabinet is arranged in the power carriage, 4 main power motors are arranged in the power carriage, the important parts are all provided with bare conductor points 10, the camera 211 shoots the video pictures of the bare conductor points 10 in real time, when an arc occurs at the bare conductor spot 10, the image analysis processing module 212 identifies the arc, and issues a switching value representing an arc to the arc fault determination chip 23 through the switching value output module 213, meanwhile, the carbon monoxide sensor 221 collects the carbon monoxide concentration at the position in real time, the infrared temperature sensor 222 collects the temperature of the surface of the bare conductor point 10, when the carbon monoxide concentration and the temperature value of the surface of the bare conductor spot 10 both reach the set values of 300 mg per cubic meter, meanwhile, when the temperature measured by the infrared temperature sensor 222 exceeds 500 ℃, the 3HC32F4A0 series MCU judges that the fault arc exists at the bare conductor point 10;
the number of the label of the bare conductor point 10 displayed in the fault monitoring frame 311 on the display screen 31 is 2, the represented area is one of motor power line switches of a power distribution cabinet arranged in a power carriage, the video area 3111 displays the picture of the bare conductor point 10 in real time, the state display area 3112 displays the voltage value and the current value in real time, and displays that an arc fault exists, the physical position area 3113 displays the physical position information of the bare conductor point 10, the GD32E230 series MCU control alarm 33 gives an alarm, after hearing the alarm information, a worker quickly checks the fault information on the display screen 31, knows the fault of the motor power line switch at a specific position, quickly reduces the vehicle speed, and carries out power-off treatment at the corresponding power distribution cabinet, and carries out emergency replacement treatment on the corresponding motor power line switch, thereby avoiding the generation of larger faults.
The above are all preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (10)
1. A rail transit power supply equipment fault analysis system, includes bare conductor point (10) of rail transit power supply equipment electrical part, its characterized in that: the device comprises a voltage and current monitoring module (1), an arc monitoring module (2) and a fault simulation analysis module (3), wherein the voltage and current monitoring module (1) comprises a group of electric quantity transmitters (11) and a group of A/D converters (12), the input ends of the group of electric quantity transmitters (11) are respectively connected with bare conductor points (10), the A/D converters (12) are electrically connected with analog quantity output ports of the electric quantity transmitters (11), the arc monitoring module (2) judges whether the bare conductor points (10) generate fault arcs or not in a mode of combining visual and gas detection, marks the fault arc points and transmits judgment results and marks to the fault simulation analysis module (3), the fault simulation analysis module (3) is provided with a display screen (31), a central control chip (32) and an alarm (33) which are used for fault analysis and display control, the group of A/D converters (12) are respectively in communication and electrical connection with the central control chip (32), the arc monitoring module (2) is in communication and electrical connection with the central control chip (32), and the central control chip (32) is in communication and electrical connection with the display screen (31) and controls the switch of the alarm (33).
2. The rail transit power supply equipment fault analysis system of claim 1, characterized in that: the arc monitoring module (2) comprises an arc spark monitoring unit based on vision, an arc accompanying gas monitoring unit (22) and a fault arc judging chip (23), the arc spark monitoring unit comprises a group of cameras (211), an image analysis processing module (212) and a switching value output module (213), the group of cameras (211) are respectively arranged on one side of each bare conductor point (10) through a support and are respectively in communication and electric connection with a signal input end of the image analysis processing module (212) through a communication line, the image analysis processing module (212) is in communication and electric connection with the fault arc judging chip (23) through the switching value output module (213), the arc accompanying gas monitoring unit (22) comprises a carbon monoxide sensor (221) and an infrared temperature sensor (222), the carbon monoxide sensor (221) and the infrared temperature sensor (222) are respectively in communication and connection with the fault arc judging chip (23), the fault arc determination chip (23) is in communication connection with the central control chip (32).
3. The rail transit power supply equipment fault analysis system of claim 2, wherein: and an image output interface of the image analysis processing module (212) is connected with a display screen (31) of the fault simulation analysis module (3) through a video line.
4. The rail transit power supply equipment fault analysis system of claim 2, wherein: when the image analysis processing module (212) analyzes that the bare conductor point (10) has an arc picture, a set switching value is sent to the fault arc judgment chip (23) through the switching value output module (213), the fault arc judgment chip (23) judges whether the concentration reaches a set carbon monoxide concentration threshold value or not through the carbon monoxide sensor (221) which compares the same time, meanwhile, the infrared temperature sensor (222) judges whether the temperature reaches the set temperature threshold value or not, and if yes, the fault arc judgment chip (23) sends the bare conductor point (10) to the central control chip (32) to be in a fault arc state.
5. The rail transit power supply equipment fault analysis system of claim 4, wherein: the threshold carbon monoxide concentration is 300 milligrams per cubic meter.
6. The rail transit power supply equipment fault analysis system of claim 4, wherein: the temperature threshold is 500 ℃.
7. The rail transit power supply equipment fault analysis system of claim 1, characterized in that: the central control chip (32) is a GD32E230 series MCU.
8. The rail transit power supply equipment fault analysis system of claim 4, wherein: the image analysis processing module (212) is a kirschner vision recognition module.
9. The rail transit power supply equipment fault analysis system of claim 4, wherein: the fault arc determination chip (23) is a Huada HC32F4A0 series MCU.
10. The rail transit power supply equipment fault analysis system of any one of claims 1 to 9, wherein: the operation process of the fault simulation analysis module (3) is as follows:
the method comprises the steps that a fault monitoring frame (311) matched with the number of bare conductor points (10) is displayed on a display screen (31) in an analog mode, the fault monitoring frame (311) is displayed in a label mode, a video zone (3111), a state display zone (3112) and a physical position zone (3113) are arranged in the fault monitoring frame (311), a video zone (3111) displays a picture shot by a camera (211) in real time, the state display zone (3112) displays a voltage current value at the bare conductor points (10) and displays whether a fault arc exists, and the physical position zone (3113) displays physical position information of the bare conductor points (10).
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