CN108802631A - A kind of contact net power supply high-pressure system insulation detecting method - Google Patents
A kind of contact net power supply high-pressure system insulation detecting method Download PDFInfo
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- CN108802631A CN108802631A CN201810608018.8A CN201810608018A CN108802631A CN 108802631 A CN108802631 A CN 108802631A CN 201810608018 A CN201810608018 A CN 201810608018A CN 108802631 A CN108802631 A CN 108802631A
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- 238000009413 insulation Methods 0.000 title claims abstract description 128
- 238000000034 method Methods 0.000 title claims abstract description 50
- 238000012544 monitoring process Methods 0.000 claims abstract description 56
- 230000000630 rising effect Effects 0.000 claims description 45
- 238000001514 detection method Methods 0.000 claims description 22
- 230000005611 electricity Effects 0.000 claims description 16
- 238000007689 inspection Methods 0.000 claims description 8
- 238000012360 testing method Methods 0.000 claims description 3
- 238000005452 bending Methods 0.000 claims 1
- 230000001771 impaired effect Effects 0.000 abstract description 6
- 230000007257 malfunction Effects 0.000 abstract description 5
- 238000010276 construction Methods 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000002955 isolation Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
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- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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Classifications
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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
- G01R31/40—Testing power supplies
- G01R31/42—AC power supplies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L5/00—Current collectors for power supply lines of electrically-propelled vehicles
- B60L5/18—Current collectors for power supply lines of electrically-propelled vehicles using bow-type collectors in contact with trolley wire
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
- B60M1/00—Power supply lines for contact with collector on vehicle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
- B60M1/00—Power supply lines for contact with collector on vehicle
- B60M1/12—Trolley lines; Accessories therefor
-
- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Transportation (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention discloses a kind of contact net power supply high-pressure system insulation detecting methods, and pantograph, high-voltage circuitbreaker, high voltage isolator, high-tension transformer are sequentially connected.Pantograph is contacted with contact net, and one end of high voltage potential transformer primary side is connected between pantograph and high-voltage circuitbreaker, and the other end is connected to the ground.Accumulator passes sequentially through inverter, Insulation monitoring electrical power contact device is connected to the secondary side of high voltage potential transformer.High-tension transformer is connected with rectifier, hyperbaric chamber door is provided between high-tension transformer and rectifier, high-pressure system includes the block contact for reflecting hyperbaric chamber door opening and closing state.When meet simultaneously pantograph be in arciform state drops, high voltage isolator is off and hyperbaric chamber door is closed when, high-pressure system Insulation monitoring could be carried out.It is impaired and cause system cisco unity malfunction that the present invention can solve high-pressure system insulation, and then contact net is caused to trip, or even the technical issues of blow contact net, influence railway transportation.
Description
Technical field
The present invention relates to Railway Electric fields, are supplied more particularly, to a kind of contact net applied to railway engineering working truck
Power supply high-pressure system insulation detecting method.
Background technology
Currently, with the continuous growth of China railways total kilometrage, railroad maintenance workload also increasingly increases, large-scale maintainer
Tool has become the main power of China railways maintenance, has tens mechanized construction teams to be active in ten thousand li of railway lines daily
On.The operation in the wild throughout the year of these construction teams, war severe cold, bucket heat, are the development of China railways cause, especially in recent years
The speed-raising of railway is made that huge contribution.In order to solve the problem concerning life of railroad maintenance fleet in the wild, each road bureau is all vehicle
Team is equipped with the train of camping for having mechanized construction operation function.These camp trains based on passenger train vehicle transformation and
Come, is provided between sleeping berth, the facilities such as kitchen and dining room.In the prior art, CN205890886U, CN106080625A,
The patents such as CN202389375U, CN101386305B, CN201712613U, CN201283866Y, CN101386305A provide
The structure of this train of camping.
The train of camping of mechanized construction team is typically all to take electricity from bus stop on the way, is responsible for by water power section, and place
The time that train is sought in each station stop is all very short, and water power section must frequently arrive construction team and connect electricity.And these stops on the way
It stands typically small station, the transformer capacity on small station is all smaller, and no normal direction train of camping provides the electric energy for comparing large capacity,
So train of camping all carries the diesel generating set provided for oneself.Many times, especially in summer and use in winter air-conditioning
When generally all from diesel generating set to train power supply of camping.Massive diesel-fuel is consumed by diesel generating set power generation, simultaneously
Environment is caused seriously to pollute, the noise that generating set is sent out also causes interference to construction team member and surrounding resident.In addition, bavin
The capacity of oily generating set is also little, and many electrical equipments such as electromagnetic stove, electric shower-bath, refrigerator etc. can not all use on vehicle.
However, the electrified mileage of China railways is all being increased with very high speed every year at present, each main line is substantially electrified,
Electric railway from now on will be more and more, if often camping in the mechanized construction of electrified section operation is equipped with one on train
The system that set directly can take electricity from contact net can obtain great Rong no matter the train that can make to camp is parked in where from contact net
The electric energy of amount fundamentally solves various drawbacks of diesel generating set to avoid water power section from frequently connecing the trouble of electricity.
Currently, in order to solve to camp train electricity consumption the technical issues of, house trailer is generally provided with contact net power supply,
Contact net voltage is converted into civilian three-phase four-wire system voltage.Contact net power supply is flowed by pantograph from contact net, because
The control of this pantograph and main circuit breaker is the key that system safe and reliable operation.High-pressure system working environment is severe, need through
Often bear the invasion exposed to the sun and rain with frost and snow dust storm.Insulation is normally the premise of high-pressure system normal work, and high-pressure system is most easy
It is insulation fault to break down.If high-pressure system insulation is impaired, gently if system cisco unity malfunction, it is heavy then contact net is caused to be jumped
Lock, or even contact net can be blown, influence railway transportation.Therefore it needs often to check high-pressure system insulation, to ensure to be
System normal work does not influence railway contact line power supply.
In the prior art, electric locomotive at present is widely used roof high-voltage isulation detection device, but the device is simultaneously
It is not suitable for contact net powersupply system, the main reason is that：
(1) existing roof high-voltage isulation detection device is not interlocked with high-tension transformer from circuit isolation signals, if high
Pressure transformer is not isolated from circuit and carries out Insulation monitoring, can lead to high-voltage insulating system overcurrent protection；
(2) high-voltage isulation detection device need to be chain with hyperbaric chamber door, and existing roof high-voltage isulation detection device connects without this
Lock signal interface.
It is a kind of using new structural contact net power supply electricity therefore, it is necessary to be found according to contact net power supply particular/special requirement
Source high-pressure system and its insulation detecting method.
Invention content
In view of this, the purpose of the present invention is to provide a kind of contact net power supply high-pressure system insulation detecting method,
It is impaired and cause system cisco unity malfunction to solve high-pressure system insulation, and then contact net is caused to trip, or even blow contact
Net, the technical issues of influencing railway transportation.
In order to achieve the above-mentioned object of the invention, the present invention specifically provides a kind of contact net power supply high-pressure system insulation inspection
The technic relization scheme of survey method, a kind of contact net power supply high-pressure system insulation detecting method, contact net power supply are high
Pressure system includes：Accumulator, inverter, Insulation monitoring electrical power contact device, high voltage potential transformer, pantograph, high-voltage circuitbreaker,
High voltage isolator and high-tension transformer.The pantograph, high-voltage circuitbreaker, high voltage isolator, high-tension transformer phase successively
Even.The pantograph is contacted with contact net, and one end of the high voltage potential transformer primary side is connected to the pantograph and height
Between voltage breaker, the other end is connected to the ground.The accumulator passes sequentially through inverter, Insulation monitoring electrical power contact device is connected to
The secondary side of the high voltage potential transformer.The high-tension transformer is connected with rectifier, in the high-tension transformer and rectification
Hyperbaric chamber door is provided between device, the high-pressure system further includes being connected with hyperbaric chamber door, for reflecting that the hyperbaric chamber door is opened
The hyperbaric chamber door block contact of off status.When meeting simultaneously, pantograph is in the arciform state of drop, high voltage isolator is in and disconnects shape
When state and hyperbaric chamber door are closed, high-pressure system Insulation monitoring could be carried out.
Preferably, high-pressure system insulation inspection is carried out by reading the voltage value of the high voltage potential transformer secondary side
It surveys.
Preferably, when carrying out high-pressure system Insulation monitoring, by the high-tension transformer from the contact net power supply
It is isolated in high-pressure system.
Preferably, the high-pressure system includes rising bow/drop bow selecting switch and high-voltage isulation detection switch.The method into
One step includes：The rising bow/drop bow selecting switch is connected with high-voltage isulation detection switch.By the high-voltage isulation detection switch
It is connected with the control coil of high voltage isolator.When the rising bow/drop bow selecting switch is in drop bow position, the high pressure is connected
Insulation monitoring switchs, and disjunction and the closure of the high voltage isolator are controlled by the high-voltage isulation detection switch.
Preferably, the method further includes：The main contacts of the Insulation monitoring electrical power contact device is connected to described
Between inverter and high voltage potential transformer.The first auxiliary contact of disconnecting switch of the high voltage isolator are connected on insulation
In the coil for detecting electrical power contact device, the first auxiliary contact of the disconnecting switch are normally-closed contact.When progress high-pressure system insulation
When detection, the high voltage isolator, which is in, disconnects position, and the first auxiliary contact of the disconnecting switch, which are in, is closed position, the insulation
The coil for detecting electrical power contact device is closed to carry out high-pressure system Insulation monitoring.
Preferably, when carrying out high-pressure system Insulation test, if the pantograph carries out rising bow operation or the high pressure
Room door is opened, then operation is invalid or high-pressure system Insulation monitoring interrupts.
Preferably, the method further includes：Hyperbaric chamber door block contact is connected on the Insulation monitoring to supply
In the coil of electric contactor.When the hyperbaric chamber, door is opened, the hyperbaric chamber door block contact disconnects, and the Insulation monitoring supplies
The coil losing electricity of electric contactor, high-pressure system Insulation monitoring interrupt.
Preferably, the high-pressure system further includes and the rising bow valve for controlling the current collecting bow lifting bow.The method
Further comprise：The second auxiliary contact and hyperbaric chamber door of the rising bow valve and the Insulation monitoring electrical power contact device are chain
Contact series, the accumulator are powered by the second auxiliary contact, hyperbaric chamber door block contact for the rising bow valve.When the height
Pressure chamber door opening causes hyperbaric chamber door block contact to disconnect, or electric causes institute when the coil of the Insulation monitoring electrical power contact device obtains
The disconnection of the second auxiliary contact is stated, the rising bow operation of the rising bow valve dead electricity, the rising bow valve is invalid.
Preferably, the method further includes：By disconnecting switch the second auxiliary contact string of the high voltage isolator
It is associated in the closing coil of the high-voltage circuitbreaker, when carrying out high-pressure system Insulation monitoring, the high-voltage circuitbreaker can close
It closes.When the pantograph rising bow and when running, it is necessary to could be closed the high pressure after the high voltage isolator is closed in place
Breaker.
Preferably, before the pantograph carries out rising bow operation, high-pressure system Insulation monitoring is carried out.If detecting high pressure
System insulation failure then forbids the pantograph to carry out rising bow operation, described after inspection has handled high-pressure system insulation fault
Pantograph could carry out rising bow operation.
By implementing the technical solution for the contact net power supply high-pressure system insulation detecting method that aforementioned present invention provides,
It has the advantages that：
(1) contact net power supply high-pressure system insulation detecting method of the present invention can solve high-pressure system insulation it is impaired and
Cause system cisco unity malfunction, and then contact net is caused to trip, or even blow contact net, the technology for influencing railway transportation is asked
Topic；
(2) contact net power supply high-pressure system insulation detecting method of the present invention uses high voltage isolator by high pressure transformation
Device is isolated, and high tension apparatus as much as possible is enable to carry out insulation inspection, especially makes the higher wall bushing of failure rate
It can carry out high-voltage isulation detection；
(3) hyperbaric chamber door is closed and is used as high-voltage isulation by contact net power supply high-pressure system insulation detecting method of the present invention
It checks entry condition, personnel can be avoided to be strayed into hyperbaric chamber and lead to high pressure electric shock accidents；
(4) contact net power supply high-pressure system insulation detecting method of the present invention is using high-tension transformer isolation signals as height
Pressure insulation inspection condition, can avoid high-voltage isulation from checking system overload.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described.It should be evident that the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Other embodiments are obtained according to these attached drawings.
Fig. 1 is a kind of circuit topology of specific embodiment of contact net power supply high-pressure system insulation detecting method of the present invention
Structure chart；
Fig. 2 is a kind of Insulation monitoring of specific embodiment of contact net power supply high-pressure system insulation detecting method of the present invention
Functional block diagram；
Fig. 3 is a kind of rising bow control of specific embodiment of contact net power supply high-pressure system insulation detecting method of the present invention
Circuit diagram；
Fig. 4 is the local amplification circuit structural schematic diagram in Fig. 1；
Fig. 5 is the local amplification circuit structural schematic diagram of another part in Fig. 1；
In figure：1- accumulators, 2- filters, 3- inverters, 4- high voltage potential transformers, 5- contact nets, 6- pantographs, 7-
Arrester, 8- babinets, 9- high-voltage circuitbreakers, 10- wall bushings, 11- high-tension fuses, the hyperbaric chambers 12- door block contact, 13-
High-tension transformer, 14- current transformers, 15- earth clips, 16- rail, 17- rectifiers, 18- inverters, 19- output switches,
20- is loaded, the hyperbaric chambers 21- door, 22- coils, 23- main contacts, the first auxiliary contact of 24-, the second auxiliary contact of 25-, 26- controls
Coil, PV- voltmeters, YV- rising bow valves, QA1- rising bows/drop bend selecting switch, QA4- high-voltage isulation detection switch, QS1- high pressures
Disconnecting switch, KM6- Insulation monitoring electrical power contact devices, S5- Insulation monitorings are for electrical circuit breakers, QS1-1- high voltage isolators first
Auxiliary contact, the second auxiliary contact of QS1-2- high voltage isolators.
Specific implementation mode
For the sake of quoting and understanding, by the technical term hereinafter used, writes a Chinese character in simplified form or abridge and be described below：
Contactor：The operation principle of contactor is that after contactor coil is powered, coil current will produce magnetic field, is generated
Magnetic field make static iron core generate electromagnetic attraction to attract dynamic iron core, and contacts of contactor is driven to act, normally-closed contact disconnects, normally opened to touch
Point is closed, and the two is linkage.When the coil is de-energized, electromagnetic attraction disappears, and armature discharges under the action of release spring, makes to touch
Point restores, and normally opened contact disconnects, and normally-closed contact is closed.A.C. contactor using main contact come control circuit, with auxiliary contact come
Control loop is connected.Main contact is usually normal opened contact, and auxiliary contact often has two pairs of normal opened contacts and normally closed contact.
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical solution in the embodiment of the present invention carries out clear, complete description.Obviously, described embodiment is only
Only it is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, the common skill in this field
All other embodiment that art personnel are obtained without creative efforts belongs to the model that the present invention protects
It encloses.
As shown in attached drawing 1 to attached drawing 5, the tool of contact net power supply high-pressure system insulation detecting method of the present invention is given
Body embodiment, the invention will be further described in the following with reference to the drawings and specific embodiments.
Contact net power supply high-pressure system is divided into roof high-pressure system and interior high-pressure system.Roof high-pressure system is general
Including pantograph 6, insulator (not shown), arrester 7, high voltage potential transformer 4, high-voltage circuitbreaker 9, wall bushing 10
(top half)；Interior high-pressure system includes wall bushing 10 (lower half portion), high-tension fuse 11, high voltage isolator QS1
With high-tension transformer 13.Because the excitation current of high-tension transformer 13 is larger, and high-pressure side one end of high-tension transformer 13 is direct
Ground connection, so when carrying out high-pressure system Insulation monitoring, it is necessary to by high-tension transformer 13 from contact net power supply high-pressure system
Middle isolation.Then confirm whether high voltage equipment insulation is normal, forbid rising bow if high voltage equipment insulation is impaired, check processing insulation
Ability rising bow after failure to ensure that high-pressure system works normally, and ensures the safety of contact net 5.As shown in Fig. 2, inverter
DC110V voltages are converted to AC120V single-phase alternating currents by 18.4 secondary side of high voltage potential transformer is counter to send AC120V voltage (high pressures
The no-load voltage ratio of voltage transformer 4 is 250：1), then it can be obtained the single phase ac of 30kV in the primary side of high voltage potential transformer 4
Electricity.
As shown in attached drawing 1,4 and 5, a kind of embodiment of contact net power supply high-pressure system insulation detecting method, high pressure
System specifically includes：Accumulator 1, Insulation monitoring electrical power contact device KM6, high voltage potential transformer 4, pantograph 6, is kept away inverter 3
Thunder device 7, high-voltage circuitbreaker 9, high-tension fuse 11, high voltage isolator QS1 and high-tension transformer 13.Pantograph 6, high pressure open circuit
Device 9, high-tension fuse 11, high voltage isolator QS1, high-tension transformer 13 are sequentially connected.Pantograph 6 is contacted with contact net 5, high
One end of 4 primary side of medium-voltage potential transformers is connected between pantograph 6 and high-voltage circuitbreaker 9, and the other end is connected to the ground.Arrester
7 one end is connected between pantograph 6 and high-voltage circuitbreaker 9, and the other end is connected to the ground by babinet 8.Accumulator 1 passes sequentially through
Inverter 3, Insulation monitoring electrical power contact device KM6 are connected to the secondary side of high voltage potential transformer 4.High-voltage circuitbreaker 9 and high pressure
Wall bushing 10 is arranged on cable between fuse 11.High-tension transformer 13 is connected with rectifier 17, in high-tension transformer
Hyperbaric chamber door 21 is provided between 13 and rectifier 17, contact net power supply high-pressure system further includes and hyperbaric chamber 21 phases of door
Even, the hyperbaric chamber door block contact 12 for reflecting hyperbaric chamber 21 on off states of door.In addition, the one of 13 input side of high-tension transformer
End is connected with high voltage isolator QS1, and the other end passes sequentially through current transformer 14, earth clip 15 is connected to rail 16.Rectification
Device 17, inverter 18, output switch 19, load 20 are sequentially connected.Accumulator 1 is connected by filter 2 with inverter 3, electric power storage
Insulation monitoring is connected between pond 1 and filter 2 for electrical circuit breakers S5.It is in the arciform state of drop, high pressure when meeting pantograph 6 simultaneously
When disconnecting switch QS1 is off and hyperbaric chamber door 21 is closed, high-pressure system Insulation monitoring could be carried out.
It, can be by connecting voltmeter PV in the secondary side of high voltage potential transformer 4 and reading as shown in attached drawing 2 and attached drawing 4
Its voltage value is taken to carry out high-pressure system Insulation monitoring.If high-pressure system insulation against ground is good, high-pressure system equivalent electricity over the ground
It is infinitely great (relative to current-limiting resistance R11) to hinder R, then the reading at voltage pointer table PV should be 120V or so.If high
Voltage device insulation against ground is destroyed, then the value of equivalent resistance R strongly reduces, and high-pressure section will increase earth-current, high tension voltage
The primary side current of mutual inductor 4 increases, and secondary side current is synchronized with 250 times of multiplying power to be increased, then the partial pressure on current-limiting resistance R11
Also increase, at this moment the reading of voltmeter PV can decline.Can be to judge the insulation of high voltage component according to the reading of voltmeter PV
It is no to be destroyed, while can counter send to control system of the secondary side voltage of high voltage potential transformer 4 be recorded and be handled.
Contact net power supply high-pressure system further comprises rising bow/drop bow selecting switch QA1 (two self-lockings) and high pressure
Insulation monitoring switch QA4 (the three not self-lockings of band lamp).High-pressure system insulation detecting method further comprises：By rising bow/drop bow choosing
It selects switch QA1 with high-voltage isulation detection switch QA4 to be connected, by the control of high-voltage isulation detection switch QA4 and high voltage isolator QS1
Coil 26 processed is connected.When rising bow/drop bow selecting switch QA1 is in drop bow position, high-voltage isulation detection switch QA4 is connected, is passed through
The disjunction of high-voltage isulation detection switch QA4 control high voltage isolators QS1 and closure.
High-pressure system insulation detecting method further comprises：The main contacts 23 of Insulation monitoring electrical power contact device KM6 is connected
Between inverter 3 and high voltage potential transformer 4, when carrying out high-pressure system Insulation monitoring, it is necessary to by high voltage isolator QS1
It disconnects, its implementation is that the first auxiliary contact of disconnecting switch QS1-1 of high voltage isolator QS1 is connected on Insulation monitoring to supply
In the coil 22 of electric contactor KM6, the first auxiliary contact of disconnecting switch QS1-1 is normally-closed contact.When progress high-pressure system insulation
When detection, high voltage isolator QS1, which is in, disconnects position, and the first auxiliary contact of disconnecting switch QS1-1, which is in, is closed position, Insulation monitoring
The coil 22 of electrical power contact device KM6 is closed to carry out high-pressure system Insulation monitoring.
High-pressure system insulation detecting method further comprises：Hyperbaric chamber door block contact 12 is connected on Insulation monitoring power supply
In the coil 22 of contactor KM6.When hyperbaric chamber door 21 is opened, hyperbaric chamber door block contact 12 disconnects, such as attached drawing 3 and attached drawing 4
Shown in B point dead electricity, 22 dead electricity of coil of Insulation monitoring electrical power contact device KM6, high-pressure system Insulation monitoring interrupt.Carrying out height
When pressure system insulation test, if pantograph 6 carries out rising bow operation or hyperbaric chamber door 21 is opened, invalid or high-pressure system is operated
Insulation monitoring interrupts.
As shown in Fig. 3, high-pressure system further includes and the rising bow valve YV for controlling the lifting bow of pantograph 6.High-pressure system
Insulation detecting method further comprises：By the second auxiliary contact 25 of rising bow valve YV and Insulation monitoring electrical power contact device KM6, and height
Pressure chamber door block contact 12 is connected, and accumulator 1 is that rising bow valve YV is supplied by the second auxiliary contact 25, hyperbaric chamber door block contact 12
Electricity.Being opened when hyperbaric chamber door 21 causes hyperbaric chamber door block contact 12 to disconnect, or when the coil of Insulation monitoring electrical power contact device KM6
22 electric must cause the second auxiliary contact 25 to disconnect, rising bow valve YV dead electricity, and the rising bow operation of rising bow valve YV is invalid.
High-pressure system insulation detecting method further comprises：The auxiliary of disconnecting switch second of high voltage isolator QS1 is touched
Point QS1-2 is connected in the closing coil HZ (FZ is switching winding in figure) of high-voltage circuitbreaker 9.It is examined when carrying out high-pressure system insulation
When survey, high-voltage circuitbreaker 9 can be closed.When 6 rising bow of pantograph and when running, it is necessary to be closed in place in high voltage isolator QS1
After could closed high breaker 9.In figure 5, QA2 switchs for control of high-voltage circuit breaker, and KA1 is relay.
Before pantograph 6 carries out rising bow operation, high-pressure system Insulation monitoring is carried out.If detecting high-pressure system insulation event
Barrier then forbids pantograph 6 to carry out rising bow operation, and after inspection has handled high-pressure system insulation fault, pantograph 6 could be risen
Bow operation.
By the skill for implementing the contact net power supply high-pressure system insulation detecting method of specific embodiment of the invention description
Art scheme can have the following technical effects：
(1) the contact net power supply high-pressure system insulation detecting method of specific embodiment of the invention description can solve height
Pressure system insulation is impaired and causes system cisco unity malfunction, and then contact net is caused to trip, or even blows contact net, influences iron
The technical issues of road is transported；
(2) specific embodiment of the invention description contact net power supply high-pressure system insulation detecting method using high pressure every
It leaves pass high-tension transformer is isolated, so that high tension apparatus as much as possible is carried out insulation inspection, especially make failure rate
Higher wall bushing can also carry out high-voltage isulation detection；
(3) specific embodiment of the invention description contact net power supply high-pressure system insulation detecting method by hyperbaric chamber door
It closes and checks entry condition as high-voltage isulation, personnel can be avoided to be strayed into hyperbaric chamber and lead to high pressure electric shock accidents；
(4) the contact net power supply high-pressure system insulation detecting method of specific embodiment of the invention description is by high pressure transformation
Device isolation signals check condition as high-voltage isulation, and high-voltage isulation can be avoided to check system overload.
Each embodiment is described by the way of progressive in this specification, the highlights of each of the examples are with other
The difference of embodiment, just to refer each other for identical similar portion between each embodiment.
The above described is only a preferred embodiment of the present invention, being not intended to limit the present invention in any form.Though
So the present invention has been disclosed with preferred embodiment as above, and however, it is not intended to limit the invention.It is any to be familiar with those skilled in the art
Member, in the case where not departing from the Spirit Essence and technical solution of the present invention, all using in the methods and techniques of the disclosure above
Appearance makes many possible changes and modifications to technical solution of the present invention, or is revised as the equivalent embodiment of equivalent variations.Therefore,
Every content without departing from technical solution of the present invention is made to the above embodiment any simple according to the technical essence of the invention
Modification, equivalent replacement, equivalence changes and modification still fall within the range of technical solution of the present invention protection.
Claims (10)
1. a kind of contact net power supply high-pressure system insulation detecting method, which is characterized in that contact net power supply high pressure system
System includes：Accumulator (1), inverter (3), Insulation monitoring electrical power contact device (KM6), high voltage potential transformer (4), pantograph
(6), high-voltage circuitbreaker (9), high voltage isolator (QS1) and high-tension transformer (13)；The pantograph (6), high-voltage circuitbreaker
(9), high voltage isolator (QS1), high-tension transformer (13) are sequentially connected；The pantograph (6) contacts with contact net (5), institute
The one end for stating high voltage potential transformer (4) primary side is connected between the pantograph (6) and high-voltage circuitbreaker (9), the other end
It is connected to the ground；The accumulator (1) passes sequentially through inverter (3), Insulation monitoring electrical power contact device (KM6) is connected to the high pressure
The secondary side of voltage transformer (4)；The high-tension transformer (13) is connected with rectifier (17), in the high-tension transformer (13)
Hyperbaric chamber door (21) is provided between rectifier (17), the high-pressure system further includes being connected with hyperbaric chamber door (21), is used for
Reflect the hyperbaric chamber door block contact (12) of described hyperbaric chamber door (21) on off state；It is in drop when meeting pantograph (6) simultaneously
It, could be into horizontal high voltage when arciform state, high voltage isolator (QS1) are off and hyperbaric chamber door (21) is closed
System insulation detects.
2. contact net power supply high-pressure system insulation detecting method according to claim 1, it is characterised in that：Pass through reading
The voltage value of the high voltage potential transformer (4) secondary side is taken to carry out high-pressure system Insulation monitoring.
3. contact net power supply high-pressure system insulation detecting method according to claim 1 or 2, it is characterised in that：When
When carrying out high-pressure system Insulation monitoring, by the high-tension transformer (13) from the contact net power supply high-pressure system interval
From.
4. contact net power supply high-pressure system insulation detecting method according to claim 3, which is characterized in that the height
Pressure system includes rising bow/drop bow selecting switch (QA1) and high-voltage isulation detection switch (QA4)；The method further includes：
The rising bow/drop bow selecting switch (QA1) is connected with high-voltage isulation detection switch (QA4)；
The high-voltage isulation detection switch (QA4) is connected with the control coil (26) of high voltage isolator (QS1)；
When the rising bow/drop bow selecting switch (QA1) is in drop bow position, the high-voltage isulation detection switch (QA4) is connected, is led to
Cross disjunction and closure that the high-voltage isulation detection switch (QA4) controls the high voltage isolator (QS1).
5. according to claim 1,2 or 4 any one of them contact net power supply high-pressure system insulation detecting methods, feature
It is, the method further includes：
The main contacts (23) of the Insulation monitoring electrical power contact device (KM6) is connected to the inverter (3) and high tension voltage is mutual
Between sensor (4)；
The first auxiliary contact of disconnecting switch (QS1-1) of the high voltage isolator (QS1) are connected on Insulation monitoring power supply to connect
In the coil (22) of tentaculum (KM6), the first auxiliary contact of the disconnecting switch (QS1-1) are normally-closed contact；
When carrying out high-pressure system Insulation monitoring, the high voltage isolator (QS1), which is in, disconnects position, the disconnecting switch first
Auxiliary contact (QS1-1), which are in, is closed position, and the coil (22) of the Insulation monitoring electrical power contact device (KM6) is closed with into horizontal high voltage
System insulation detects.
6. contact net power supply high-pressure system insulation detecting method according to claim 5, it is characterised in that：Carry out
When high-pressure system Insulation test, if the pantograph (6) carries out rising bow operation or hyperbaric chamber door (21) is opened, operate
Invalid or high-pressure system Insulation monitoring interrupts.
7. special according to claim 1,2,4 or 6 any one of them contact net power supply high-pressure system insulation detecting methods
Sign is, the method further includes：
Hyperbaric chamber door block contact (12) is connected in the coil (22) of the Insulation monitoring electrical power contact device (KM6)；
When hyperbaric chamber door (21) is opened, the hyperbaric chamber door block contact (12) disconnects, and the Insulation monitoring power supply connects
Coil (22) dead electricity of tentaculum (KM6), high-pressure system Insulation monitoring interrupt.
8. contact net power supply high-pressure system insulation detecting method according to claim 7, which is characterized in that the height
Pressure system further includes lifting the rising bow valve (YV) bent with for controlling the pantograph (6)；The method further includes：
By the second auxiliary contact (25) and hyperbaric chamber of the rising bow valve (YV) and the Insulation monitoring electrical power contact device (KM6)
Door block contact (12) is connected, and the accumulator (1) is institute by the second auxiliary contact (25), hyperbaric chamber door block contact (12)
State rising bow valve (YV) power supply；
Being opened when hyperbaric chamber door (21) causes hyperbaric chamber door block contact (12) to disconnect, or when Insulation monitoring power supply connects
The coil (22) of tentaculum (KM6) electric must cause second auxiliary contact (25) to disconnect, rising bow valve (YV) dead electricity, the liter
The rising bow operation for bending valve (YV) is invalid.
9. according to claim 1,2,4,6 or 8 any one of them contact net power supply high-pressure system insulation detecting methods,
It is characterized in that, the method further includes：
The second auxiliary contact of disconnecting switch (QS1-2) of the high voltage isolator (QS1) are connected on the high-voltage circuitbreaker
(9) in closing coil (HZ), when carrying out high-pressure system Insulation monitoring, the high-voltage circuitbreaker (9) can be closed；
When the pantograph (6) rising bow and when running, it is necessary to could be closed after the high voltage isolator (QS1) is closed in place
The high-voltage circuitbreaker (9).
10. contact net power supply high-pressure system insulation detecting method according to claim 9, it is characterised in that：Institute
Before stating pantograph (6) progress rising bow operation, high-pressure system Insulation monitoring is carried out；If detecting high-pressure system insulation fault,
The pantograph (6) is forbidden to carry out rising bow operation, after inspection has handled high-pressure system insulation fault, the pantograph (6) is
It can carry out rising bow operation.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810608018.8A CN108802631B (en) | 2018-06-13 | 2018-06-13 | Method for detecting insulation of high-voltage system of power supply of contact network |
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| CN201810608018.8A CN108802631B (en) | 2018-06-13 | 2018-06-13 | Method for detecting insulation of high-voltage system of power supply of contact network |
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| CN108802631B CN108802631B (en) | 2020-10-09 |
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