CN110509821A - A kind of system and method passed through with electric field monitoring train pantograph and control train power supply commutation - Google Patents
A kind of system and method passed through with electric field monitoring train pantograph and control train power supply commutation Download PDFInfo
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- CN110509821A CN110509821A CN201910779197.6A CN201910779197A CN110509821A CN 110509821 A CN110509821 A CN 110509821A CN 201910779197 A CN201910779197 A CN 201910779197A CN 110509821 A CN110509821 A CN 110509821A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
- B60M3/00—Feeding power to supply lines in contact with collector on vehicles; Arrangements for consuming regenerative power
- B60M3/04—Arrangements for cutting in and out of individual track sections
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/26—Arrangements for eliminating or reducing asymmetry in polyphase networks
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
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- Electric Propulsion And Braking For Vehicles (AREA)
- Current-Collector Devices For Electrically Propelled Vehicles (AREA)
Abstract
The system for passing through the invention discloses kind electric field monitoring train pantograph and controlling train power supply commutation, including control room and 3 electric field monitoring points T1, T2 and T3, wherein；Electric field is provided with electric-field sensor in monitoring point, electric-field sensor surrounding electric field slight size and variation when for detecting pantograph by near electric-field sensor；Control room is arranged in the commutation section N of high-tension cable, the electric field intensity signal that electric field monitoring point is detected is transferred to control room by optical fiber, it is converted into after electric signal by the optical transmitter and receiver and is transferred to industrial personal computer, industrial personal computer issues control instruction control switch switch K1 and switch K2 according to electric signal.The variation of electric field when the present invention is passed through using electric-field sensor induction train pantograph, to judge the position of pantograph, then it is powered using A phase or B phase to commutation section N according to the position of pantograph, guarantee that train does not power off when the commutation of commutation section, improves the average speed and conevying efficiency of train.
Description
Technical field
The present invention relates to trains for electrical domain, and in particular to a kind of to be passed through with electric field monitoring train pantograph and control train confession
The system and method for electric commutation.
Background technique
Present train is all driven by electricity, and supply voltage is high pressure 27.5KV, by the dedicated pantograph on top of train from height
Crimping takes electricity.China is three phase supply, i.e. A/B/C three-phase, and train be individual event take electricity, for guarantee three-phase equilibrium, train every
A distance will commutation power supply, i.e., A, B, C power in turn, to ensure safety, the area that when commutation does not power provided with one section
Between N, have a problem that at this time, when train enters the commutation section N, train does not power and runs out of steam, train speed decline,
It needs to slide into B phase section by inertia, so, reduces the average speed of train, reduce conevying efficiency.Even, have
When train inertia it is inadequate, or influenced by wind-force etc., stop in the section N, need to rescue, cause a column such as train delays
Problem.
Therefore it needs to solve the problems, such as to power in commutation section N train.
Summary of the invention
It is in order to solve the above-mentioned technical problem, of the invention that provide a kind of train in commutation section N may be that it provides electricity
The system and method for energy guarantees speed of the train in commutation, improves train average speed and conevying efficiency.
To achieve the above object, the technical solution adopted by the present invention is as follows: it is a kind of with electric field monitoring train pantograph by simultaneously
The system for controlling train power supply commutation, including control room and 3 electric field monitoring points T1, T2 and T3, in which:
The electric field monitoring point T1, T2 and T3 are arranged in from 0.7 meter of position and being separately positioned on a distance from high-tension cable
The A phase section of high-tension cable, in commutation section N and B phase section；It is provided with electric-field sensor in the electric field monitoring point, is used for
Electric-field sensor surrounding electric field slight size and variation when detecting pantograph by near electric-field sensor, according to electric field sensing
The variation of device calculates the key position of power supply commutation and the position of pantograph；
The control room is arranged in the commutation section N of high-tension cable, is provided with power module in control room, optical transmitter and receiver,
Industrial personal computer, master control set, two switches K1, K2 and two relay J1, J2；The electric field that the electric field monitoring point is detected
Strength signal is transferred to control room by optical fiber, is converted into after electric signal by the optical transmitter and receiver and is transferred to industrial personal computer, the industry control
Machine issues control instruction control switch switch K1 and switch K2 according to electric signal；
The switch K1 connects the A phase of high-tension cable and the B phase and commutation of commutation section N, switch K2 connection high-tension cable
Section N；
When detecting that pantograph appears in B phase section, then when industrial personal computer issues K2 close command, control master control set passes through
Power module exports 24V and gives relay J2, and J2 is allowed to be closed, and is closed by J2 and provides the alternating current of 220V for K2 master control, then given
Commutation section N power supply；When pantograph appears in A phase section, then industrial personal computer issues K1 close command, control master control set output
24V gives relay J1, and J1 is allowed to be closed, and the alternating current for being K1 master control 220V by J1 closure is then powered to commutation section N.
Preferably, the K1 and K2 is interlock type, and each to carry a reversed auxiliary mechanical switch, i.e., main switch, which is controlled, closes
When conjunction, then auxiliary switch is disconnected automatically by linkage mechanism, and side's auxiliary switch is the main switch control power supply of another party.
Preferably, auxiliary switch one end of the K1 is connect with relay J2, the auxiliary switch connection of the other end and K2.
Preferably, auxiliary switch one end of the K2 is connect with relay J1, the auxiliary switch connection of the other end and K1.
Preferably, the main switch of the K1 and K2 is connected with each other.
Preferably, the voltage of the high-tension cable is 27.5kv.
Preferably, electric-field sensor surrounding electric field is light when the electric-field sensor detection pantograph is by near electric-field sensor
The formula of the size of degree is as follows:
When pantograph is when from electric-field sensor remote position, the calculation formula of electric field are as follows: E1=k (U/r1), unit are
KV/m, wherein U=27.5KV, r=0.7m, k are coefficient, and value range is between 0.25~1.5；
When pantograph reaches electric-field sensor, the electric field strength E2=K (U/r2) that electric-field sensor senses, unit is
KV/m, wherein U=27.5KV, r=0.3m, k are coefficient, and value range is between 0.25~1.5；
Pantograph passes through electric field difference E=E2-E1 caused by electric-field sensor；
As electric field difference E=13.1KV/m, and the duration is 1S or more, then judges that pantograph has passed through the electric-field sensor,
Judge that pantograph appears in the phase section of the electric-field sensor set-point.
A method of passed through with electric field monitoring train pantograph and control train power supply commutation, this method is applied such as right
It is required that it is above-mentioned it is a kind of pass through and control train power supply commutation system with electric field monitoring train pantograph, this method includes following step
It is rapid:
S1: the electric field strength of high-tension cable is detected by electric-field sensor T1, T2 and T3, and the electric field strength of detection is believed
Number optical transmitter and receiver is sent to by optical fiber；
S2: the optical transmitter and receiver is transmitted to industrial personal computer after electric field intensity signal is converted to electric signal；
S3: the industrial personal computer carries out discriminatory analysis to received electric signal,
When the difference in change of the electric field strength of T1 detection is 13.1KV/m, and the duration is 1S or more, then judges that pantograph is logical
T1 electric-field sensor is crossed, judging that pantograph appears in and in A phase section, turns off the switch K1 at this time by K1 is commutation section N confession
Electricity；
When the difference in change of the electric field strength of T3 detection is 13.1KV/m, and the duration is 1S or more, then judges that pantograph is logical
T3 electric-field sensor is crossed, judging that pantograph appears in and in B phase section, turns off the switch K2 at this time by K2 is commutation section N confession
Electricity.
Preferably, electric-field sensor surrounding electric field is light when the electric-field sensor detection pantograph is by near electric-field sensor
The formula of the size of degree is as follows:
When pantograph is when from electric-field sensor remote position, the calculation formula of electric field are as follows: E1=k (U/r1), unit are
KV/m, wherein U=27.5KV, r=0.7m, k are coefficient, and value range is between 0.25~1.5；
When pantograph reaches electric-field sensor, the electric field strength E2=K (U/r2) that electric-field sensor senses, unit is
KV/m, wherein U=27.5KV, r=0.3m, k are coefficient, and value range is between 0.25~1.5；
Pantograph passes through electric field difference E=E2-E1 caused by electric-field sensor；
As electric field difference E=13.1KV/m, and the duration is 1S or more, then judges that pantograph has passed through the electric-field sensor,
Judge that pantograph appears in the phase section of the electric-field sensor set-point.
Preferably, when occurring abnormal, switch K1 and K2 are simultaneously switched off, and method flow is as follows:
Step D0: K1 and K2 is kept to simultaneously switch off, J1, J2 are also simultaneously switched off, and phase section N is without electricity；
Step D1: when to continue 1s or so higher for the electric field of T1 point, judge whether pantograph passes through T1 point, if pantograph does not jump
To step D0；If pantograph jumps to step D2 by T1 point；
Step D2: industrial personal computer, which issues control instruction, is closed J1, and 220V alternating current controls the master of K1 by the auxiliary switch of K2
It closes the switch, phase section N is powered by A phase；
D3: when to continue 1s or so higher for the electric field of T2 point, judge whether pantograph passes through T2 point, if pantograph is not over T2 point
Then jump to step D2；If pantograph jumps to step D4 by T1 point；
Step D4: industrial personal computer, which issues control instruction, disconnects J1, and K1 main switch disconnects, control J2 closure, 220V alternating current
The main switch closure of K2 is controlled by the auxiliary switch of K1, phase section N is powered by B phase；
D5: when to continue 1s or so higher for the electric field of T3 point, judge whether pantograph passes through T3 point, if pantograph is not over T3 point
Then jump to step D4；If pantograph jumps to step D6 by T3 point；
Step D6: industrial personal computer, which issues control instruction, makes J1, and J2 is disconnected so that the main switch of K1 and K2 disconnects, phase section N without
Then electricity jumps to step D0 again.
The beneficial technical effect of the present invention: the change of electric field when the present invention is passed through using electric-field sensor induction train pantograph
Change, to judge the position of pantograph, be then powered using A phase or B phase to commutation section N according to the position of pantograph, is protected
Card train does not power off when the commutation of commutation section, improves the average speed and conevying efficiency of train.
Detailed description of the invention
Fig. 1 be it is of the invention when train pantograph farther out from electric-field sensor when electric field detection schematic diagram.
Fig. 2 is the electric field detection schematic diagram of the invention when train pantograph is to big electric-field sensor.
Fig. 3, which is that the present invention is a kind of, monitors the overall system architecture that train pantograph passes through and controls train power supply commutation with electric field
Schematic diagram；
The step of Fig. 4 is a kind of method passed through with electric field monitoring train pantograph and control train power supply commutation of the invention is shown
It is intended to.
Fig. 5 is the present invention step flow chart that switch K1 and K2 are simultaneously switched off when occurring abnormal.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments to the present invention
It is further elaborated, but the scope of protection of present invention is not limited to following specific embodiments.
It is designed the present invention is based on following principle: guaranteeing that the front and back of train pantograph is bent when powering to commutation section N
It appears in some phase simultaneously, if anterior arch has arrived at B phase, cantle then can to commutation section N power supply at this time also in A phase
The short circuit of AB phase is caused to cause major accident.Therefore it needs to be determined that knowing for pantograph position and section, when the front and back of pantograph is bent
When all in some phase, then it can power to the section N.
As shown in Figs. 1-5, a kind of system passed through with electric field monitoring train pantograph and control train power supply commutation, including control
Room processed and 3 electric field monitoring points T1, T2 and T3, in which:
The electric field monitoring point T1, T2 and T3 are arranged in from 0.7 meter of position and being separately positioned on a distance from high-tension cable
The A phase section of high-tension cable, in commutation section N and B phase section, the voltage of the high-tension cable be specially 27.5kv.It is described
Electric field is provided with electric-field sensor in monitoring point, electricity around electric-field sensor when for detecting pantograph by near electric-field sensor
The size and variation that field is slight calculate the key position of power supply commutation and the place of pantograph according to the variation of electric-field sensor
Position；
Specifically, electric-field sensor surrounding electric field is slight when electric-field sensor detection pantograph is by near electric-field sensor
The formula and method and step of size are as follows:
When pantograph is when from electric-field sensor remote position, the calculation formula of electric field are as follows: E1=k (U/r1), unit are
KV/m, wherein U=27.5KV, r=0.7m, k are coefficient, and value range is between 0.25~1.5；
When pantograph reaches electric-field sensor, the electric field strength E2=K (U/r2) that electric-field sensor senses, unit is
KV/m, wherein U=27.5KV, r=0.3m, k are coefficient, and value range is between 0.25~1.5；
Pantograph passes through electric field difference E=E2-E1 caused by electric-field sensor；
As electric field difference E=13.1KV/m, and the duration is 1S or more, then judges that pantograph has passed through the electric-field sensor,
Judge that pantograph appears in the phase section of the electric-field sensor set-point.
A specific example is lifted below to be illustrated, with reference to Fig. 1 and Fig. 2:
Electric-field sensor is mounted away from about 0.7 meter of 27.5KV cable of position, when leaving electric-field sensor for pantograph
When remote position, the calculation method of electric field is as follows:
Assuming that being uniform electric field, the collected electric field strength E1=k (U/r) of electric-field sensor, U on 27.5KV cable periphery
=27.5KV, r are electrical body with a distance from sensor, and k is coefficient (experiment obtains).Electric-field sensor is mounted on from cable 0.7
The position of rice.
When pantograph is far from electric-field sensor, the electric field of electric-field sensor is determined by b point voltage, electric-field sensor induction
Electric field strength E1=K (the 27.5/0.7)=K*39.29 arrived, unit KV/m.
When pantograph reaches electric-field sensor, the electric field of electric-field sensor determines that electric-field sensor senses by a point voltage
Electric field strength E2=K (27.5/0.3)=K*91.66, unit KV/m.
Therefore, pantograph is by electric field difference E=E2-E1=52.37*k, unit KV/m caused by sensor.
As known from the above examples, k value range is between 0.25~1.5, size and the ash in there was dampness in the air degree, air
Dirt particle etc. is related.The minimum value that E can be obtained is 52.37*0.25=13.1KV/m, and variation clearly, and is that electric field is held
Continuous 1S's or so is higher, is not accidental disturbing pulse.
Therefore on the spot it is poor be 13.1KV/m, and be electric field continue 1S or so it is higher when, can determine pantograph by this
Electric-field sensor.
The control room is arranged in the commutation section N of high-tension cable, is provided with power module in control room, optical transmitter and receiver,
Industrial personal computer, master control set, two switches K1, K2 and two relay J1, J2；The electric field that the electric field monitoring point is detected
Strength signal is transferred to control room by optical fiber, is converted into after electric signal by the optical transmitter and receiver and is transferred to industrial personal computer, the industry control
Machine issues control instruction control switch switch K1 and switch K2 according to electric signal；
The switch K1 connects the A phase of high-tension cable and the B phase and commutation of commutation section N, switch K2 connection high-tension cable
Section N；
When detecting that pantograph appears in B phase section, then when industrial personal computer issues K2 close command, control master control set passes through
Power module exports 24V and gives relay J2, and J2 is allowed to be closed, and is closed by J2 and provides the alternating current of 220V for K2 master control, then given
Commutation section N power supply；When pantograph appears in A phase section, then industrial personal computer issues K1 close command, control master control set output
24V gives relay J1, and J1 is allowed to be closed, and the alternating current for being K1 master control 220V by J1 closure is then powered to commutation section N.
Specifically, the K1 and K2 is interlock type, and each to carry a reversed auxiliary mechanical switch, i.e., main switch, which is controlled, closes
When conjunction, then auxiliary switch is disconnected automatically by linkage mechanism, and side's auxiliary switch is the main switch control power supply of another party.The K1
The one end auxiliary switch K1b connect with relay J2, the connection of the auxiliary switch of the other end and K2.One end auxiliary switch K2b of the K2 with
The auxiliary switch of relay J1 connection, the other end and K1 connect.The main switch k1a and k2a of the K1 and K2 is connected with each other.
A method of passed through with electric field monitoring train pantograph and control train power supply commutation, this method is applied such as right
It is required that it is above-mentioned it is a kind of pass through and control train power supply commutation system with electric field monitoring train pantograph, this method includes following step
It is rapid:
S1: the electric field strength of high-tension cable is detected by electric-field sensor T1, T2 and T3, and the electric field strength of detection is believed
Number optical transmitter and receiver is sent to by optical fiber；
S2: the optical transmitter and receiver is transmitted to industrial personal computer after electric field intensity signal is converted to electric signal；
S3: the industrial personal computer carries out discriminatory analysis to received electric signal,
When the difference in change of the electric field strength of T1 detection is 13.1KV/m, and the duration is 1S or more, then judges that pantograph is logical
T1 electric-field sensor is crossed, judging that pantograph appears in and in A phase section, turns off the switch K1 at this time by K1 is commutation section N confession
Electricity；
When the difference in change of the electric field strength of T3 detection is 13.1KV/m, and the duration is 1S or more, then judges that pantograph is logical
T3 electric-field sensor is crossed, judging that pantograph appears in and in B phase section, turns off the switch K2 at this time by K2 is commutation section N confession
Electricity.
Electric-field sensor surrounding electric field slight big when electric-field sensor detection pantograph is by near electric-field sensor
Small formula is as follows:
When pantograph is when from electric-field sensor remote position, the calculation formula of electric field are as follows: E1=k (U/r1), unit are
KV/m, wherein U=27.5KV, r=0.7m, k are coefficient, and value range is between 0.25~1.5；
When pantograph reaches electric-field sensor, the electric field strength E2=K (U/r2) that electric-field sensor senses, unit is
KV/m, wherein U=27.5KV, r=0.3m, k are coefficient, and value range is between 0.25~1.5；
Pantograph passes through electric field difference E=E2-E1 caused by electric-field sensor；
As electric field difference E=13.1KV/m, and the duration is 1S or more, then judges that pantograph has passed through the electric-field sensor,
Judge that pantograph appears in the phase section of the electric-field sensor set-point.
The premise of train transport is absolute guarantee's safety, so control K1 and K2, it is necessary to dual fail-safe.Under any abnormal conditions
Must be that K1 and K2 are disconnected entirely, when occurring abnormal, switch K1 and K2 are simultaneously switched off, and method flow is as follows:
Step D0: K1 and K2 is kept to simultaneously switch off, J1, J2 are also simultaneously switched off, and phase section N is without electricity；
Step D1: when to continue 1s or so higher for the electric field of T1 point, judge whether pantograph passes through T1 point, if pantograph does not jump
To step D0；If pantograph jumps to step D2 by T1 point；
Step D2: industrial personal computer, which issues control instruction, is closed J1, and 220V alternating current controls the master of K1 by the auxiliary switch of K2
It closes the switch, phase section N is powered by A phase；
D3: when to continue 1s or so higher for the electric field of T2 point, judge whether pantograph passes through T2 point, if pantograph is not over T2 point
Then jump to step D2；If pantograph jumps to step D4 by T1 point；
Step D4: industrial personal computer, which issues control instruction, disconnects J1, and K1 main switch disconnects, control J2 closure, 220V alternating current
The main switch closure of K2 is controlled by the auxiliary switch of K1, phase section N is powered by B phase；
D5: when to continue 1s or so higher for the electric field of T3 point, judge whether pantograph passes through T3 point, if pantograph is not over T3 point
Then jump to step D4；If pantograph jumps to step D6 by T3 point；
Step D6: industrial personal computer, which issues control instruction, makes J1, and J2 is disconnected so that the main switch of K1 and K2 disconnects, phase section N without
Then electricity jumps to step D0 again.
The variation of electric field when the present invention is passed through using electric-field sensor induction train pantograph, thus judge the position of pantograph,
Then it is powered using A phase or B phase to commutation section N according to the position of pantograph, guarantees train in the commutation of commutation section
When do not power off, improve the average speed and conevying efficiency of train.
According to the disclosure and teachings of the above specification, those skilled in the art in the invention can also be to above-mentioned embodiment party
Formula is changed and is modified.Therefore, the invention is not limited to the specific embodiments disclosed and described above, to the one of invention
A little modifications and changes should also be as falling into the scope of the claims of the present invention.In addition, although being used in this specification
Some specific terms, these terms are merely for convenience of description, does not constitute any restrictions to invention.
Claims (10)
1. a kind of system passed through with electric field monitoring train pantograph and control train power supply commutation, which is characterized in that including control
Room and 3 electric field monitoring points T1, T2 and T3, in which:
The electric field monitoring point T1, T2 and T3 are arranged in from 0.7 meter of position and being separately positioned on high pressure with a distance from high-tension cable
The A phase section of cable, in commutation section N and B phase section；It is provided with electric-field sensor in the electric field monitoring point, for detecting
Electric-field sensor surrounding electric field slight size and variation when pantograph is by near electric-field sensor, according to electric-field sensor
Variation calculates the key position of power supply commutation and the position of pantograph；
The control room is arranged in the commutation section N of high-tension cable, and power module, optical transmitter and receiver, industry control are provided in control room
Machine, master control set, two switches K1, K2 and two relay J1, J2；The electric field strength that the electric field monitoring point is detected
Signal is transferred to control room by optical fiber, is converted into after electric signal by the optical transmitter and receiver and is transferred to industrial personal computer, the industrial personal computer root
Control instruction control switch switch K1 and switch K2 are issued according to electric signal；
The switch K1 connects the A phase of high-tension cable and B phase and the commutation section of commutation section N, switch K2 connection high-tension cable
N；
When detecting that pantograph appears in B phase section, then when industrial personal computer issues K2 close command, control master control set passes through power supply
Module exports 24V and gives relay J2, and J2 is allowed to be closed, and is closed by J2 and provides the alternating current of 220V for K2 master control, then gives commutation
Section N power supply；When pantograph appears in A phase section, then industrial personal computer issues K1 close command, control master control set exports 24V
Relay J1 is given, J1 is allowed to be closed, the alternating current for being K1 master control 220V by J1 closure is then powered to commutation section N.
2. a kind of system passed through with electric field monitoring train pantograph and control train power supply commutation as described in claim 1,
It being characterized in that, the K1 and K2 are interlock type, it is each to carry a reversed auxiliary mechanical switch, i.e., when main switch is closed by control,
Then auxiliary switch is disconnected automatically by linkage mechanism, and side's auxiliary switch is the main switch control power supply of another party.
3. a kind of system passed through with electric field monitoring train pantograph and control train power supply commutation as claimed in claim 2,
It is characterized in that, auxiliary switch one end of the K1 is connect with relay J2, the auxiliary switch connection of the other end and K2.
4. a kind of system passed through with electric field monitoring train pantograph and control train power supply commutation as claimed in claim 3,
It is characterized in that, auxiliary switch one end of the K2 is connect with relay J1, the auxiliary switch connection of the other end and K1.
5. a kind of system passed through with electric field monitoring train pantograph and control train power supply commutation as claimed in claim 4,
It is characterized in that, the main switch of the K1 and K2 are connected with each other.
6. a kind of system passed through with electric field monitoring train pantograph and control train power supply commutation as described in claim 1,
It is characterized in that, the voltage of the high-tension cable is 27.5kv.
7. a kind of system passed through with electric field monitoring train pantograph and control train power supply commutation as claimed in claim 6,
It is characterized in that, electric-field sensor surrounding electric field slight big when electric-field sensor detection pantograph is by near electric-field sensor
Small formula is as follows:
When pantograph is when from electric-field sensor remote position, the calculation formula of electric field are as follows: E1=k (U/r1), unit KV/m,
Wherein U=27.5KV, r=0.7m, k are coefficient, and value range is between 0.25~1.5；
When pantograph reaches electric-field sensor, electric field strength E2=K (U/r2), the unit KV/m that electric-field sensor senses,
Wherein U=27.5KV, r=0.3m, k are coefficient, and value range is between 0.25~1.5；
Pantograph passes through electric field difference E=E2-E1 caused by electric-field sensor；
As electric field difference E=13.1KV/m, and the duration is 1S or more, then judges that pantograph has passed through the electric-field sensor, is judged
Pantograph appears in the phase section of the electric-field sensor set-point.
8. a kind of method passed through with electric field monitoring train pantograph and control train power supply commutation, this method apply right such as and want
Ask 1-7 is any described a kind of to be passed through with electric field monitoring train pantograph and control train power supply commutation system, which is characterized in that should
Method the following steps are included:
S1: the electric field strength of high-tension cable is detected by electric-field sensor T1, T2 and T3, and the electric field intensity signal of detection is led to
It crosses optical fiber and is sent to optical transmitter and receiver；
S2: the optical transmitter and receiver is transmitted to industrial personal computer after electric field intensity signal is converted to electric signal；
S3: the industrial personal computer carries out discriminatory analysis to received electric signal,
When T1 detection electric field strength difference in change be 13.1KV/m, and the duration be 1S or more, then judge that pantograph passes through
T1 electric-field sensor, judging that pantograph appears in and in A phase section, turns off the switch K1 at this time by K1 is commutation section N power supply；
When T3 detection electric field strength difference in change be 13.1KV/m, and the duration be 1S or more, then judge that pantograph passes through
T3 electric-field sensor, judging that pantograph appears in and in B phase section, turns off the switch K2 at this time by K2 is commutation section N power supply.
9. the as claimed in claim 8 kind of method for being passed through with electric field monitoring train pantograph and controlling train power supply commutation, special
Sign is that the electric-field sensor detection pantograph passes through electric-field sensor surrounding electric field slight size when near electric-field sensor
Formula it is as follows:
When pantograph is when from electric-field sensor remote position, the calculation formula of electric field are as follows: E1=k (U/r1), unit KV/m,
Wherein U=27.5KV, r=0.7m, k are coefficient, and value range is between 0.25~1.5；
When pantograph reaches electric-field sensor, electric field strength E2=K (U/r2), the unit KV/m that electric-field sensor senses,
Wherein U=27.5KV, r=0.3m, k are coefficient, and value range is between 0.25~1.5；
Pantograph passes through electric field difference E=E2-E1 caused by electric-field sensor；
As electric field difference E=13.1KV/m, and the duration is 1S or more, then judges that pantograph has passed through the electric-field sensor, is judged
Pantograph appears in the phase section of the electric-field sensor set-point.
10. the as claimed in claim 8 kind of method for being passed through with electric field monitoring train pantograph and controlling train power supply commutation, special
Sign is that switch K1 and K2 are simultaneously switched off when occurring abnormal, and method flow is as follows:
Step D0: K1 and K2 is kept to simultaneously switch off, J1, J2 are also simultaneously switched off, and phase section N is without electricity；
Step D1: when to continue 1s or so higher for the electric field of T1 point, judge whether pantograph passes through T1 point, if pantograph does not jump to step
Rapid D0；If pantograph jumps to step D2 by T1 point；
Step D2: industrial personal computer, which issues control instruction, is closed J1, and 220V alternating current controls the main switch of K1 by the auxiliary switch of K2
Closure, phase section N are powered by A phase；
D3: when to continue 1s or so higher for the electric field of T2 point, judge whether pantograph passes through T2 point, jumped if pantograph is not over T2 point
Go to step D2；If pantograph jumps to step D4 by T1 point；
Step D4: industrial personal computer, which issues control instruction, disconnects J1, and K1 main switch disconnects, and control J2 closure, 220V alternating current passes through
The main switch closure of the auxiliary switch control K2 of K1, phase section N are powered by B phase；
D5: when to continue 1s or so higher for the electric field of T3 point, judge whether pantograph passes through T3 point, jumped if pantograph is not over T3 point
Go to step D4；If pantograph jumps to step D6 by T3 point；
Step D6: industrial personal computer, which issues control instruction, makes J1, and J2 is disconnected, so that the main switch of K1 and K2 disconnects, phase section N is without electric right
Jump to step D0 again afterwards.
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| CN111854586A (en) * | 2020-06-04 | 2020-10-30 | 北京交通大学 | Train pantograph position detection method and device based on electric field intensity change |
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