CN113109677A - High-speed bow net arc discharge simulation device and method thereof - Google Patents
High-speed bow net arc discharge simulation device and method thereof Download PDFInfo
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- CN113109677A CN113109677A CN202110401706.9A CN202110401706A CN113109677A CN 113109677 A CN113109677 A CN 113109677A CN 202110401706 A CN202110401706 A CN 202110401706A CN 113109677 A CN113109677 A CN 113109677A
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- 238000004088 simulation Methods 0.000 title claims abstract description 28
- 238000010891 electric arc Methods 0.000 title claims abstract description 24
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- 230000001105 regulatory effect Effects 0.000 claims description 9
- 238000004804 winding Methods 0.000 claims description 2
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- 230000005672 electromagnetic field Effects 0.000 description 1
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- 238000004451 qualitative analysis 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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1218—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing using optical methods; using charged particle, e.g. electron, beams or X-rays
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- G—PHYSICS
- G01—MEASURING; TESTING
- 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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Abstract
The invention belongs to the field of high-speed train simulation tests, and particularly discloses a high-speed pantograph-catenary arc discharge simulation device and method. The simulation device comprises a bow net part and a power supply part; the pantograph net part comprises a contact wire and a pantograph; the contact wires are connected end to end, turns are wound on the two wheel discs, and the wheel discs are driven by a motor; the pantograph is arranged on the roof of the train model; the power supply section supplies a voltage to the contact line. The invention can truly and accurately simulate the bow net arc discharge of the high-speed train and accurately simulate each voltage phase when the bow net is discharged.
Description
Technical Field
The invention belongs to the field of high-speed train simulation tests, and particularly relates to a high-speed pantograph-catenary arc discharge simulation device and method.
Background
With the rapid development of high-speed railways in China, the influence of electromagnetic interference on weak current systems such as train-mounted communication signals is larger and larger, and the safe operation of trains is not facilitated. According to previous tests, the reason for generating electromagnetism is mainly bow net separation and contact caused by uneven line running and uneven contact suspension elastic distribution, and the electromagnetic field frequency band radiated to the space by the discharge arc generated in the process is very wide and covers the frequency band used by equipment in most train control systems. When the electromagnetic interference reaches a certain degree, the normal operation of the equipment is interfered, so that hidden danger is formed on the operation safety of the train. This phenomenon has been a major cause of high-speed train failure. The method provides a basis for researching the action mechanism of the pantograph-catenary offline electromagnetic interference and evaluating the influence of the electromagnetic interference on the running safety of the high-speed train set. The high-speed bow net arc discharge simulation device is produced at the same time. The earliest of these simulation devices were proposed by italian scholars, who built them with a 1:1 size pantograph, partial contact wires, 4.1KV dc power supply. The main disadvantage is that the contact line is stationary, with some differences from the bow-web discharge situation during contact operation. Similar analog devices are developed in some colleges and universities in China, but all the devices have the common defect that the power supply voltage between the pantograph nets is only 0-240V and is far lower than the power supply voltage. In addition, all the test devices can hardly control the voltage phase at the time of pantograph-catenary discharge accurately, and it is difficult to control the variables. Therefore, a simulation device and a method thereof capable of more truly and accurately simulating the bow net arc discharge of the high-speed train are urgently needed.
Disclosure of Invention
Aiming at the problems, the invention discloses a high-speed bow net arc discharge simulation device which comprises a bow net part and a power supply part; the pantograph net part comprises a contact wire 1 and a pantograph 3; the contact wires 1 are connected end to end, turns are wound on the two wheel discs 2, and the wheel discs 2 are driven by a motor; the pantograph 3 is arranged on the roof of a train model 9; the power supply section supplies a voltage to the contact line 1.
Further, the bow net part also comprises a lifting device 4, and the lifting device 4 comprises a lifter, a lifting rod and a second sliding plate 41; the lifter is vertically installed on the roof of the train model 9, one end of the lifting rod is connected with the lifter, and the other end of the lifting rod is connected with the second sliding plate 41.
Further, the pantograph 3 comprises an air pump, a pantograph body and a first sliding plate 31;
the bow body is vertically arranged on the roof of the train model 9, and the top end of the upper arm of the bow body is connected with the first sliding plate 31; the air pump is used for driving the bow body to ascend and descend.
Furthermore, the motor is a variable frequency speed regulating motor.
Further, the power supply portion includes a power supply, a step-up transformer 5, a resistance box 6, and a brush 8; the power supply, the booster transformer 5 and the resistance box 6 are sequentially connected to form a power supply link; one end of the power supply link is communicated with the contact line 1 through an electric brush 8, and the other end of the power supply link is connected with the pantograph 3 or the lifting device 4 through a bidirectional switch 7.
The invention also discloses a high-speed bow net arc discharge simulation method,
s1: connecting the contact wires 1 end to end, winding the contact wires on the two wheel discs 2 in turns, and driving the wheel discs 2 by using a motor;
s2: installing the pantograph 3 on the roof of a train model 9, and adjusting the height of the train model 9 to ensure that the pantograph 3 is just contacted with the contact line 1 when being inflated;
s3: the power supply portion is used to supply a voltage to the contact line 1.
Further, step S2 includes fixing the lifting device 4 on the roof of the train model 9, and the lifting device 4 can contact the contact line 1 when it is lifted to the top.
Further, the power supply portion includes a power supply, a step-up transformer 5, a resistance box 6, and a brush 8;
the power supply, the booster transformer 5 and the resistance box 6 are sequentially connected to form a power supply link;
one end of the power supply link is communicated with the contact line 1 through an electric brush 8, and the other end of the power supply link is connected with the pantograph 3 or the lifting device 4 through a bidirectional switch 7.
Furthermore, the motor is a variable frequency speed regulating motor.
Advantageous effects
1) The contact wire is connected end to end, and the wheel disc is rotated, so that the relative motion between the contact wire and the pantograph can be effectively simulated.
2) The lifting device can accurately control the contact and separation time of the pantograph and the contact line, and is convenient for researching the discharge characteristic of the pantograph-catenary at different voltage phases.
3) The arc discharge phenomenon of the train when the pantograph is in contact with or separated from the contact line due to the fact that the road surface fluctuates can be rapidly simulated through the pantograph.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 shows a schematic structural diagram according to an embodiment of the invention.
In the figure: the train model comprises a 1-contact line, a 2-wheel disc, a 3-pantograph, a 31-first sliding plate, a 4-lifting device, a 41-second sliding plate, a 5-step-up transformer, a 6-resistance box, a 7-bidirectional switch, an 8-electric brush and a 9-train model.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention discloses a high-speed bow net arc discharge simulation device, wherein a structural schematic diagram of the simulation device is shown in figure 1, and it is worth explaining that in order to more vividly explain the circuit relationship between structures, the circuit parts are displayed together. As shown in fig. 1, the simulation apparatus includes a pantograph portion and a power supply portion, which are distinguished by linear thickness. The pantograph section comprises a contact line 1, a lifting device 4, a pantograph 3 and a train model 9. The contact line 1 is connected end to form a closed loop, and the contact line 1 is wound on the two wheel discs 2 in turns. The contact wire 1 is driven by a left wheel disc 2 and a right wheel disc 2, the left wheel disc 2 and the right wheel disc 2 drive the contact wire 1 to rotate, and the contact wire is similar to a conveying belt structure, and the wheel discs 2 are driven by a motor. Furthermore, the motor is a variable frequency speed regulating motor. A train model 9 is arranged right below the contact line 1, the train model 9 is fixed, and relative motion between a train and the contact line 1 when the train runs at a high speed is simulated by rotation of the contact line 1. Furthermore, the wheel disc 2 is driven by a variable frequency speed regulating motor, and the condition of different relative speeds between the train and the contact line 1 can be simulated by regulating the rotating speed of the variable frequency speed regulating motor.
The roof of the train model 9 is provided with a lifting device 4 and a pantograph 3. Specifically, the pantograph 3 includes an air pump, a pantograph body, and a first sliding plate 31. The pantograph body is vertically arranged on the roof of the train model 9, the top end of the upper arm of the pantograph body is connected with a first sliding plate 31, the air pump is used for driving the pantograph body to inflate and lift, the first sliding plate 31 is in contact with the contact line 1, and the whole pantograph 3 is basically fixed after lifting; when the air pump is switched off, the bow makes it support so that the first sliding plate 31 is disengaged from the contact wire 1. The lifting device 4 includes a lifter, a lifting lever, and a second slide plate 41. The lifter is vertically installed on the roof of the train model 9, one end of the lifting rod is connected with the lifter, and the other end of the lifting rod is connected with the second sliding plate 41. The second sliding plate 41 is controlled to ascend and descend by the elevator. When the second sliding plate 41 is raised to the highest extent, the second sliding plate 41 comes into contact with the contact wire 1, and when the elevator is lowered, the second sliding plate 41 is disengaged from the contact wire 1.
The power supply portion includes a power source, a step-up transformer 5, a resistance box 6, and a brush 8. The power supply, the step-up transformer 5 and the resistance box 6 are connected in sequence to form a power supply link. One end of the power supply link is connected with the electric brush 8 and is connected with the contact wire 1 through the electric brush 8. The other end of the power supply link is connected with a bidirectional switch 7, and when the bidirectional switch 7 is in a first phase, the bidirectional switch 7 is connected with the first sliding plate 31. When the bidirectional fast switch is on and in a first phase and the pantograph 3 is in contact with the contact wire 1, the pantograph 3 is switched in the power supply link. For example, the contact line 1 and the pantograph 3 contact point a, the brush 8 and the contact point B of the contact line 1, and at this time, the contact line 1 (hereinafter referred to as a contact line 1AB segment, and other similar numbering is not described again) between the contact line a and the contact point B is also connected to the power supply link, and finally, the power supply link, the contact line 1AB segment, and the pantograph 3 form a complete path. When the two-way switch 7 is in the second phase, the two-way switch 7 is connected to the second slider 41. When the bidirectional switch 7 is turned on and is in the second phase, and the second sliding plate 41 is lifted to the highest degree, the second sliding plate 41 is connected with the contact wire 1, and the contact point of the second sliding plate 41 and the contact wire 1 is C. When the second sliding plate 41 is in contact with the contact wire 1, the lifting device 4 is connected to the power supply link, and the contact wire 1BC section is also connected to the power supply link. The lifting device 4, the contact line 1BC segment and the power supply link form a complete path.
Illustratively, when the simulation device simulates the situation that the pantograph net contacts with the contact line 1 and generates electromagnetic disturbance in the disconnection process of the train in the smooth running process. At this time, the two-way switch 7 is switched to the first phase, the air pump starts supplying air, and the first sliding plate 31 is in contact with the contact line 1. The power supply link supplies power to the contact wire 1AB segment and the pantograph 3. After the air pump starts to work, the height of the pantograph 3 basically does not change, but the pantograph 3 is hollow, and the air is inflated to be shaped, so that the pantograph 3 has certain elasticity. When the contact wire 1 rotates, the pantograph 3 elastically deforms to a certain extent, when the pantograph 3 deforms, the pantograph 3 is disconnected from the contact wire 1, and when the pantograph 3 frequently contacts and disconnects with the contact wire 1, an electromagnetic disturbance phenomenon is generated, and an electric arc is generated. The magnetic field thus generated is then subjected to a spectral analysis using a measuring device, and then to a quantitative analysis. Specifically, the power supply in the power supply link is alternating-current voltage, and the gear of the step-up transformer 5 can be adjusted according to the actual voltage in the train running process, so that the voltage of the contact line 1AB segment is ensured to be consistent with the voltage of the contact line 1 in the train running process. And simultaneously controlling the rotating speed of the variable-frequency speed-regulating motor so as to control the rotating speed of the wheel disc 2, wherein the linear speed of the wheel disc is the relative speed between the contact line 1 and the pantograph 3, and the contact condition of the train and the pantograph net at different speeds is simulated by adjusting the relative speed. The pantograph 3 is elastically deformed when the contact wire 1 runs, and frequently contacts and breaks, so that the contact and break process between a pantograph net and the contact wire 1 of the train due to the fluctuation of topography in the running process of the train is simulated.
Illustratively, when the bidirectional switch 7 is located in the second phase, the influence of different phases on the arc discharge of the pantograph can be simulated. In particular, since the power source supplies alternating current, alternating current will also be present at the contact line 1, i.e. wave peaks and wave troughs will occur. When the wave crest and the wave trough need to be researched to discharge arc to the pantograph net, the bidirectional switch 7 is switched on to a second phase, the second sliding plate 41 is controlled to ascend and descend by the elevator, and a control circuit is further adopted to control the elevator, so that the second sliding plate 41 is connected with or disconnected from the contact wire 1 in a specific voltage phase. And collecting the volume number of the magnetic field generated by the discharge by using a measuring device for qualitative analysis. Furthermore, other influencing factors influencing the bow net arc discharge can be simulated by adopting the lifting device 4.
The invention also discloses a high-speed bow net arc discharge simulation method, which comprises the following steps:
s1: the contact wires are connected end to end and the turns are wound on two wheel discs, which are driven using a motor. Preferably, the motor is a variable frequency speed regulating motor.
S2: installing the pantograph on the roof of the train model, and adjusting the height of the train model to ensure that the pantograph is just contacted with the contact line when being inflated; preferably, step S2 further includes fixing a lifting device to the train model roof, and the lifting device can contact the contact line when it is lifted to the highest position.
S3: a power supply section is used to supply a voltage to the contact lines.
Specifically, the power supply part comprises a power supply, a step-up transformer, a resistance box and an electric brush; the power supply, the boosting transformer and the resistance box are sequentially connected to form a power supply link; one end of the power supply link is communicated with the contact line through an electric brush, and the other end of the power supply link is connected with a pantograph or a lifting device through a bidirectional switch.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (9)
1. A high-speed bow net arc discharge simulation device is characterized in that,
the simulation device comprises a bow net part and a power supply part;
the pantograph-catenary part comprises a contact wire (1) and a pantograph (3);
the contact wires (1) are connected end to end, turns are wound on the two wheel discs (2), and the wheel discs (2) are driven by a motor;
the pantograph (3) is arranged on the roof of the train model (9);
the power supply section supplies a voltage to the contact line (1).
2. The high-speed bow net arc discharge simulation device of claim 1,
the bow net part further comprises a lifting device (4), wherein the lifting device (4) comprises a lifter, a lifting rod and a second sliding plate (41);
the lifter is vertically installed on the roof of the train model (9), one end of the lifting rod is connected with the lifter, and the other end of the lifting rod is connected with the second sliding plate (41).
3. The high-speed bow net arc discharge simulation device of claim 1,
the pantograph (3) comprises an air pump, a pantograph body and a first sliding plate (31);
the bow body is vertically arranged on the roof of the train model (9), and the top end of the upper arm of the bow body is connected with the first sliding plate (31); the air pump is used for driving the bow body to ascend and descend.
4. The high-speed bow net arc discharge simulation device of claim 1,
the motor is a variable frequency speed regulating motor.
5. The high-speed bow net arc discharge simulation device of claim 2,
the power supply part comprises a power supply, a step-up transformer (5), a resistance box (6) and an electric brush (8);
the power supply, the step-up transformer (5) and the resistance box (6) are sequentially connected to form a power supply link;
one end of the power supply link is communicated with the contact line (1) through an electric brush (8), and the other end of the power supply link is connected with the pantograph (3) or the lifting device (4) through a bidirectional switch (7).
6. A high-speed bow net arc discharge simulation method using the simulation apparatus according to any one of claims 1 to 5,
s1: connecting the contact wires (1) end to end, winding the contact wires on the two wheel discs (2) in turns, and driving the wheel discs (2) by using a motor;
s2: the pantograph (3) is arranged on the roof of the train model (9), and the height of the train model (9) is adjusted, so that the pantograph (3) is just contacted with the contact line (1) when being inflated;
s3: a power supply section is used to supply a voltage to the contact line (1).
7. The high speed bow net arc discharge simulation method of claim 6,
the step S2 also comprises the step of fixing a lifting device (4) on the roof of the train model (9), and the lifting device (4) can contact the contact line (1) when being lifted to the highest position.
8. The high speed bow net arc discharge simulation method of claim 7,
the power supply part comprises a power supply, a step-up transformer (5), a resistance box (6) and an electric brush (8);
the power supply, the step-up transformer (5) and the resistance box (6) are sequentially connected to form a power supply link;
one end of the power supply link is communicated with the contact line (1) through an electric brush (8), and the other end of the power supply link is connected with the pantograph (3) or the lifting device (4) through a bidirectional switch (7).
9. The high speed bow net arc discharge simulation method of claim 6,
the motor is a variable frequency speed regulating motor.
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Cited By (3)
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| CN113884828A (en) * | 2021-09-30 | 2022-01-04 | 北京全路通信信号研究设计院集团有限公司 | Speed-adjustable bow net contact separation discharge characteristic test device |
| CN114499722A (en) * | 2022-01-10 | 2022-05-13 | 北京全路通信信号研究设计院集团有限公司 | Double-system magnetic suspension train ground communication electromagnetic interference simulation system |
| CN114720779A (en) * | 2022-05-10 | 2022-07-08 | 北京全路通信信号研究设计院集团有限公司 | Phase-controllable bow net offline electromagnetic disturbance simulation system and test method |
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