CN109374998A - DC traction system track potential and stray electrical current dynamic analog device - Google Patents
DC traction system track potential and stray electrical current dynamic analog device Download PDFInfo
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- CN109374998A CN109374998A CN201811071695.7A CN201811071695A CN109374998A CN 109374998 A CN109374998 A CN 109374998A CN 201811071695 A CN201811071695 A CN 201811071695A CN 109374998 A CN109374998 A CN 109374998A
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Abstract
The invention belongs to electrified track field of traffic, it is related to a kind of DC traction system track potential and stray electrical current dynamic analog device, comprising: train operation unit, headend unit, expanding element and ground unit.The present invention is realized using power electronic equipment come the track potential and stray electrical current of dynamic analog train DC traction system under different operating conditions, and provides the monitoring point of stray electrical current and track potential.The present invention realizes the dynamic analog for the track potential and stray electrical current under earthing modes such as being directly grounded, being grounded after floating ground or series diode to DC traction power-supply system cathode.The present invention has many advantages, such as that low cost and simulation degree are high, experimental debugging platform can be provided for the inhibition device of track potential and stray electrical current, with high application prospect and economic value is of great significance to the control and protection of DC traction power-supply system middle orbit current potential and stray electrical current.
Description
Technical field
The invention belongs to electrified track field of traffic, be related to the track potential of DC traction power-supply system a kind of with it is spuious
Electric current dynamic analog device.
Background technique
With the development of urbanization, the rail traffic of large conveying quantity plays more and more important work in modernization big city
With.It is shown according to the data that Chinese city rail traffic association issues, by December 31st, 2017, China is accumulative 34
City, which is built up, puts into operation 5022 kilometers of urban rail route, wherein light rail and subway accounting 82%.Obviously, urban track traffic has become
National economic development and the inalienable part improved the people's livelihood.
Subway and light rail generally use DC traction power-supply system at present.Electric current needed for train is provided by traction substation,
By contact net to train power transmission, and traction substation is returned to as traction current circuit by rail.Due to traveling rail
And imperfectly conduting metal, rail and the earth are also not completely insulated, can be in traveling rail when traction current passes through traveling rail return current
Upper generation track potential, while part traction current is leaked in the earth, finally returns that traction substation cathode.In traveling rail
Track potential is bigger or rail insulation degree over the ground is poorer, the stray electrical current being leaked in the earth is also bigger, this miscellaneous
It dissipates electric current and is also known as confused stream.Stray electrical current can accelerate the corrosion of metal object, under long-term galvano-cautery effect, underground metal
Body (such as pipeline, cable) will be heavily damaged.Excessively high track potential also results in certain equipment and can not work normally,
Personal safety can be jeopardized when serious.Therefore, to the monitoring and control of stray electrical current in DC traction power-supply system and track potential
It has a very important significance.
However, for solving the problems, such as that the New Measure of above-mentioned track potential and stray electrical current carries out experiment in systems in practice,
Not only at high cost, difficulty is big, and there are security threats to experimenter.Therefore, it is necessary to study a kind of direct current of low cost to lead
Draw system simulator, allows to simulate the track potential and stray electrical of DC traction system under train difference operating condition
Stream inhibits device to carry out the experimental verification of early period track potential and stray electrical current, have many advantages, such as it is at low cost, safe, to solution
Certainly track potential and stray electrical current problem are of great significance.
Prior art is to stray electrical current total amount analog result and the certain deviation of physical presence.Prior art is realized
The simulation of stray electrical current and track potential under being directly grounded to DC traction substation cathode, with direct-current traction power supply system of China
System generallys use floating ground and is not inconsistent.
Summary of the invention
In view of defect existing in the prior art, it is an object of the invention to utilize power electronic equipment, one kind is provided and is existed
To the device of the track potential of DC traction system and stray electrical current accurate simulation under train difference operating condition, and it is suitable for more
Kind DC traction substation earthing mode, the control measures for DC traction power-supply system middle orbit current potential and stray electrical current provide
Experimental verification and test platform.
To achieve the above objectives, the technical solution adopted by the present invention is that:
A kind of DC traction system track potential and stray electrical current dynamic analog device, comprising: train operation unit A, head
End unit B, expanding element C, the first ground unit D1With the second ground unit D2；
The first ground unit D1With the second ground unit D2Belong to ground unit；
The first connecting terminal 101 of the train operation unit A is connected with train 6, constitutes the input terminal O of traction current；
The second connecting terminal 102 of the train operation unit A is connected with the second connecting terminal 202 of headend unit B；
The third connecting terminal 103 of the train operation unit A is grounded；
The first connecting terminal 201 of the 4th connecting terminal 104 and headend unit B of the train operation unit A, extension are single
The first connecting terminal 301 of first C is connected；
The third connecting terminal 203 of the headend unit B is connected with the third connecting terminal 303 of expanding element C；
The 4th connecting terminal 204 of the headend unit B is connected with the negative pole end 402 of the first DC traction substation 4,
The negative pole end 402 of first DC traction substation 4 is connected to the first ground unit D1；
The second connecting terminal 302 of the expanding element C is connected with the negative pole end 502 of the second DC traction substation 5,
The negative pole end 502 of second DC traction substation 5 is connected to the second ground unit D2；
The positive terminal 401 of first DC traction substation 4 is connected to positive voltage feed line 7, the second DC traction substation 5
Positive terminal 501 be connected to positive voltage feed line 7；
The positive voltage feed line 7 is connected with train 6.
Based on the above technical solution, the train operation unit A includes: controllable resistor device 8, controllable resistor dress
Set 9 and a ground resistance Rg；
The controllable resistor device 8 and controllable resistor device 9 belong to controllable resistor device；
First connecting terminal 801 of the controllable resistor device 8 constitutes the 4th connecting terminal of train operation unit A
104, the first connecting terminal, the ground resistance R of the second connecting terminal 802 and controllable resistor device 9 of controllable resistor device 8g's
First terminal is connected, and constitutes the first connecting terminal 101 of train operation unit A, the second connecting terminal structure of controllable resistor device 9
At the second connecting terminal 102 of train running unit A, ground resistance RgSecond terminal constitute train operation unit A third
Connecting terminal 103.
Based on the above technical solution, the headend unit B includes: switch S21, switch S22, switch S23With first
Resistance value fixed resistance R21；
The switch S21First terminal constitute headend unit B the first connecting terminal 201, switch S21Second terminal
With the first resistance value fixed resistance R21First terminal be connected, constitute the 4th connecting terminal 204 of headend unit B, the first resistance value is solid
Determine resistance R21Second terminal and switch S22First terminal be connected, switch S22Second terminal and switch S23Second terminal
It is connected, constitutes the third connecting terminal 203 of headend unit B, switch S23First terminal constitute headend unit B the second terminals
Son 202.
On the basis of above scheme, the expanding element C includes: switch S31, switch S32With the second resistance value fixed resistance
R31；
The second resistance value fixed resistance R31First terminal constitute expanding element C third connecting terminal 303, second resistance
It is worth fixed resistance R31Second terminal and switch S32First terminal be connected, switch S32Second terminal and switch S31Second
Terminal is connected, and constitutes the second connecting terminal 302 of expanding element C, switch S31First terminal constitute first connecing for expanding element C
Line terminals 301.
Based on the above technical solution, the ground unit be controllable resistor device with connect or one
Resistance value fixed resistance with connect or a diode with connect, or be directly grounded.
Based on the above technical solution, the controllable resistor device includes: capacitor C, inductance L, resistance R, resistance RC
With switch T；
The first terminal of the capacitor C constitutes the first connecting terminal of controllable resistor device, the Second terminal and electricity of capacitor C
Hinder RCFirst terminal be connected, resistance RCSecond terminal constitute controllable resistor device the second connecting terminal, the switch T and
Resistance R is in parallel, and inductance L is connected between the first terminal of capacitor C and the first terminal of switch T, the Second terminal of switch T and
Resistance RCSecond terminal be connected.
Based on the above technical solution, the switch S21, switch S22, switch S23, switch S31With switch S32It is
Two-way controllable switch.
Based on the above technical solution, the switch T is two-way controllable switch.
Based on the above technical solution, the DC traction system track potential and stray electrical current dynamic analog device
The quantity of middle expanding element C is n, and the n is integer, wherein 0≤n < 50；
As n=0, there is no headend unit B and expanding element C, the second connecting terminal 102 of train operation unit A with
The negative pole end 502 of second DC traction substation 5 is connected；The 4th connecting terminal 104 of train operation unit A is led with the first direct current
The negative pole end 402 for drawing electric substation 4 is connected；
As n >=2, the third connecting terminal 303 of the first expanding element C and the third connecting terminal 203 of headend unit B
It is connected, the third connecting terminal of subsequent adjacent extension unit C is connected with the second connecting terminal of previous expanding element C；Last
The second connecting terminal 302 of a expanding element C is connected with the negative pole end 502 of the second DC traction substation 5；Train operation unit
The 4th connecting terminal 104 and N of A1The first connecting terminal of a expanding element C is connected；The second wiring of train operation unit A
Terminal 102 and N2The first connecting terminal of a expanding element C is connected, wherein N1For odd number, and 0≤N1< 50, N2For even number,
And 0≤N2<50。
The present invention has following advantageous effects:
1. the present invention utilize power electronic equipment, provide it is a kind of under train difference operating condition to DC traction system
The device of track potential and stray electrical current dynamic analog, structural module, control mode is simple, and number of devices is few.
2. the present invention can accurate simulation traction substation cathode be directly grounded, be grounded after floating ground or series diode
The track potential and stray electrical current dynamic characteristic of DC traction system under equal earthing modes.
3. the present invention is provided with control measures for the control of DC traction power-supply system middle orbit current potential and stray electrical current and is tested
Card and test platform, at low cost, stability is high, has good practical engineering application value.
Detailed description of the invention
The present invention has following attached drawing:
The track potential and stray electrical current dynamic analog device structural schematic diagram of Fig. 1 DC traction system of the present invention；
The structural schematic diagram of train operation unit A in Fig. 2 present invention；
The structural schematic diagram of headend unit B in Fig. 3 present invention；
The structural schematic diagram of expanding element C in Fig. 4 present invention；
One schematic diagram of ground unit example in Fig. 5 (a) present invention；
Two schematic diagram of ground unit example in Fig. 5 (b) present invention；
Three schematic diagram of ground unit example in Fig. 5 (c) present invention；
Four schematic diagram of ground unit example in Fig. 5 (d) present invention；
The structural schematic diagram of controllable resistor device 8 in Fig. 6 present invention；
Current flow diagram when switch T is connected in Fig. 7 (a) controllable resistor device 8；
Current flow diagram when switch T is disconnected in Fig. 7 (b) controllable resistor device 8；
Two-way one schematic diagram of controllable switch example of Fig. 8 (a)；
Two-way two schematic diagram of controllable switch example of Fig. 8 (b)；
Two-way three schematic diagram of controllable switch example of Fig. 8 (c)；
The rows of vehicle running simulation schematic diagrames one of Fig. 9 (a)；
The rows of vehicle running simulation schematic diagrames two of Fig. 9 (b)；
The equivalent resistance change curve schematic diagram of controllable resistor device when simulation train travels at the uniform speed in Figure 10 present invention；
Figure 11 (a) is inserted into the track potential and stray electrical current dynamic analog of the DC traction system of even number expanding element C
Apparatus structure schematic diagram；
Figure 11 (b) is inserted into the track potential and stray electrical current dynamic analog of the DC traction system of odd number expanding element C
Apparatus structure schematic diagram.
Specific embodiment
In order to more specifically describe the present invention, with reference to the accompanying drawing and specific embodiment is to technical solution of the present invention
It is described in detail.It is emphasized that following the description is only exemplary, the model being not intended to be limiting of the invention
It encloses and its applies.
As shown in Figure 1, DC traction system track potential of the present invention and stray electrical current dynamic analog device, packet
It includes: train operation unit A, headend unit B, expanding element C, the first ground unit D1With the second ground unit D2；
The first ground unit D1With the second ground unit D2Belong to ground unit；
The first connecting terminal 101 of the train operation unit A is connected with train 6, constitutes the input terminal O of traction current；
The second connecting terminal 102 of the train operation unit A is connected with the second connecting terminal 202 of headend unit B；
The third connecting terminal 103 of the train operation unit A is grounded；
The first connecting terminal 201 of the 4th connecting terminal 104 and headend unit B of the train operation unit A, extension are single
The first connecting terminal 301 of first C is connected；
The third connecting terminal 203 of the headend unit B is connected with the third connecting terminal 303 of expanding element C；
The 4th connecting terminal 204 of the headend unit B is connected with the negative pole end 402 of the first DC traction substation 4,
The negative pole end 402 of first DC traction substation 4 is connected to the first ground unit D1；
The second connecting terminal 302 of the expanding element C is connected with the negative pole end 502 of the second DC traction substation 5,
The negative pole end 502 of second DC traction substation 5 is connected to the second ground unit D2；
The positive terminal 401 of first DC traction substation 4 is connected to positive voltage feed line 7, the second DC traction substation 5
Positive terminal 501 be connected to positive voltage feed line 7；
The positive voltage feed line 7 is connected with train 6.
As shown in Fig. 2, the train operation unit A includes: controllable resistor device 8, controllable resistor device 9 and a ground connection
Resistance Rg；
The controllable resistor device 8 and controllable resistor device 9 belong to controllable resistor device；
First connecting terminal 801 of the controllable resistor device 8 constitutes the 4th connecting terminal of train operation unit A
104, the first connecting terminal, the ground resistance R of the second connecting terminal 802 and controllable resistor device 9 of controllable resistor device 8g's
First terminal is connected, and constitutes the first connecting terminal 101 of train operation unit A, the second connecting terminal structure of controllable resistor device 9
At the second connecting terminal 102 of train running unit A, ground resistance RgSecond terminal constitute train operation unit A third
Connecting terminal 103.
As shown in figure 3, the headend unit B includes: switch S21, switch S22, switch S23With the first resistance value fixed resistance
R21；
The switch S21First terminal constitute headend unit B the first connecting terminal 201, switch S21Second terminal
With the first resistance value fixed resistance R21First terminal be connected, constitute the 4th connecting terminal 204 of headend unit B, the first resistance value is solid
Determine resistance R21Second terminal and switch S22First terminal be connected, switch S22Second terminal and switch S23Second terminal
It is connected, constitutes the third connecting terminal 203 of headend unit B, switch S23First terminal constitute headend unit B the second terminals
Son 202.
As shown in figure 4, the expanding element C includes: switch S31, switch S32With the second resistance value fixed resistance R31；
The second resistance value fixed resistance R31First terminal constitute expanding element C third connecting terminal 303, second resistance
It is worth fixed resistance R31Second terminal and switch S32First terminal be connected, switch S32Second terminal and switch S31Second
Terminal is connected, and constitutes the second connecting terminal 302 of expanding element C, switch S31First terminal constitute first connecing for expanding element C
Line terminals 301.
Fig. 5 (a), (b), (c), (d) are the schematic diagrames of ground unit in the present invention, give four kinds of earthing modes, wherein
Fig. 5 (a) is floating ground schematic diagram；Fig. 5 (b) be series resistance after be grounded schematic diagram；Fig. 5 (c) is to be directly grounded schematic diagram；Figure
5 (d) is are grounded schematic diagram after series diode.The ground unit be respectively a controllable resistor device with connect, one
Resistance value fixed resistance with connect, a diode with connect, be directly grounded.
As shown in fig. 6, the controllable resistor device 8 includes: capacitor C, inductance L, resistance R, RCWith switch T；
Wherein, the first terminal of capacitor C constitutes the first connecting terminal 801 of controllable resistor device 8, the second end of capacitor C
Son and resistance RCFirst terminal be connected, resistance RCSecond terminal constitute controllable resistor device 8 the second connecting terminal 802, open
Pass T is in parallel with resistance R, and inductance L is connected between the first terminal of capacitor C and the first terminal of switch T, the second end of switch T
Son and resistance RCSecond terminal be connected.
The switch S21, switch S22, switch S23, switch S31, switch S32It is two-way controllable switch with switch T.
As shown in Fig. 7 (a) and 7 (b), for the operation principle schematic diagram of controllable resistor device 8 in the present invention.The controllable electric
The control strategy of resistance device 8 is:
Fig. 7 (a) show current flow diagram when controllable resistor device switch T conducting.With traction current from terminal
For 801 flow to terminal 802, traction current is by inductance L and switch T, at this point, the equivalent resistance of controllable resistor device 8 is 0；
Fig. 7 (b) show current flow diagram when controllable resistor device switch T shutdown.With traction current from terminal
For 801 flow to terminal 802, traction current is by inductance L and resistance R, at this point, the equivalent resistance of controllable resistor device 8 is electricity
The resistance value r of resistance R in road；
By the control signal dutyfactor of switch T in control controllable resistor device, it is equivalent that controllable resistor device can be controlled
Resistance value changes in the range of 0 to r, wherein when switch T is constantly on, the equivalent resistance of controllable resistor device is 0, when opening
When pass T is turned off always, the equivalent resistance of controllable resistor device is the resistance value r of resistance R in circuit.
When traction current direction flows to terminal 801, the working principle of controllable resistor device and traction current side from terminal 802
To identical when flowing to terminal 802 from terminal 801.
The controllable resistor device 9 is identical with the circuit structure of controllable resistor device 8, and working principle is also identical.
Fig. 8 (a), (b), (c) be it is two-way in the track potential and stray electrical current dynamic analog device of DC traction system can
The schematic diagram for controlling switch, gives three kinds of circuits that two-way controllable switch may be implemented, wherein Fig. 8 (a) is two reverse blockings
The antiparallel equivalent schematic of IGBT；Fig. 8 (b) is the equivalent schematic of two IGBT anti-series with anti-paralleled diode；Fig. 8
It (c) is the equivalent schematic of the IGBT parallel diode bridge circuit with anti-paralleled diode.Two-way controllable switch in the present invention
The power electronic devices such as IGBT, MOSFET can not only be selected, can also including relay etc. non-electricities electronic switching device.
By taking floating ground system as an example, Fig. 9 is rows of vehicle running simulation schematic diagrames in this programme.When train 6 from first
When traction substation 4 is run to the second traction substation 5, as shown in Fig. 9 (a), switch S in headend unit B21With switch S23It closes
It closes, switch S22It disconnects.Switch S in expanding element C31It disconnects, switch S32Closure.
The equivalent resistance of controllable resistor device 8 is 0 in train operation unit A, and the equivalent resistance of controllable resistor device 9 is r.
The first resistance value fixed resistance R in headend unit B21With the second resistance value fixed resistance R in expanding element C31Resistance value be r, this
When be equivalent to train at the first traction substation 4, when simulating train operation, controllable resistor device 8 in train operation unit A
Equivalent resistance increases to r from 0, and the equivalent resistance of controllable resistor device 9 is reduced to 0 from r in train operation unit A, and keeps column
The equivalent resistance of controllable resistor device 8 and the equivalent resistance of controllable resistor device 9 and be r in vehicle running unit A.
When the equivalent resistance of controllable resistor device 8 in train operation unit A increases to r, controllable electric in train operation unit A
When the equivalent resistance of resistance device 9 is reduced to 0, as shown in Fig. 9 (b), switch S in headend unit B22With switch S23Closure, switch
S21It disconnects.Switch S in expanding element C31Closure, switch S32It disconnects.Controllable resistor device 8 in train operation unit A is controlled at this time
Equivalent resistance be reduced to 0 from r, the equivalent resistance of controllable resistor device 9 increases to r from 0 in train operation unit A, and keeps
The equivalent resistance of controllable resistor device 8 and the equivalent resistance of controllable resistor device 9 and be r in train operation unit A.
When the equivalent resistance of controllable resistor device 8 in train operation unit A increases to r, controllable electric in train operation unit A
When the equivalent resistance of resistance device 9 is reduced to 0, that is, train operation is equivalent to the second traction substation 5.
Wherein: assuming that the distance between the first traction substation 4 and the second traction substation 5 are l, then expanding element C the
Three terminals 303 are the fixation position of the first traction substation of distance l/2.
Figure 10 is the track potential and stray electrical current dynamic analog device for simulating DC traction system when train travels at the uniform speed
The equivalent resistance change curve schematic diagram of middle controllable resistor device.
Closure switch S21、S23、S32, disconnect switch S22、S31, the equivalent resistance of controllable resistor device 8 in train operation unit A
Value is 0, and the equivalent resistance of controllable resistor device 9 is r in train operation unit A, is equivalent to train at this time first and draws power transformation
At institute 4, when simulation train travels at the uniform speed, the equivalent resistance for controlling controllable resistor device 8 in train operation unit A linearly increases from 0
It is added to r, the equivalent resistance of controllable resistor device 9 is linearly reduced to 0 from r in train operation unit A, and keeps train operation unit
The equivalent resistance of the equivalent resistance of controllable resistor device 8 and controllable resistor device 9 and be r in A.
When the equivalent resistance of controllable resistor device 8 in train operation unit A increases to r, controllable electric in train operation unit A
When the equivalent resistance of resistance device 9 is reduced to 0, switch S is disconnected21、 S32, at the same time, closure switch S22、S23And S31, arrange at this time
The equivalent resistance of controllable resistor device 8 is linearly reduced to 0 from r in vehicle running unit A, and controllable resistor fills in train operation unit A
Set 9 equivalent resistance and increase linearly to r from 0, and keep in train operation unit A the equivalent resistance of controllable resistor device 8 with can
Control resistance device 9 equivalent resistance and be r.
When the equivalent resistance of controllable resistor device 8 in train operation unit A increases to r, controllable electric in train operation unit A
When the equivalent resistance of resistance device 9 is reduced to 0, that is, train operation is equivalent to the second traction substation 5.
Figure 11 is n expanding element (C of insertion1, C2... ..., Cn-1, Cn) DC traction system track potential and stray electrical
Flowable state simulator structural schematic diagram.Including:
One train operation unit A, headend unit a B, n expanding element (C1, C2... ..., Cn-1, Cn), two connect
Ground unit (D1, D2)。
The first connecting terminal 101 of train operation unit A is connected with train 6 constitutes the input terminal O of traction current；Train fortune
The third connecting terminal 103 of row unit A is grounded；The first of the 4th connecting terminal 104 and headend unit B of train operation unit A
Connecting terminal 201, expanding element C1The first connecting terminal 311, expanding element C3The first connecting terminal 331 ... and with
Expanding element Cn-13 (n-1) 1 of the first connecting terminal be connected；The 4th connecting terminal 204 of headend unit B and the first DC traction
The negative pole end 402 of electric substation 4 is connected, and the negative pole end 402 of the first DC traction substation 4 is connected to the first ground unit D1；Expand
Open up unit CnThe second connecting terminal 3n2 be connected with the negative pole end 502 of the second DC traction substation 5, the second DC traction become
Electricity 5 negative pole end 502 be connected to the second ground unit D2；The positive terminal 401 of first DC traction substation 4 is connected to just
The positive terminal 501 of voltage feed line 7, the second DC traction substation 5 is connected to positive voltage feed line 7；
When n is even number, as shown in Figure 11 (a), the second connecting terminal 102 and headend unit B's of train operation unit A
Second connecting terminal 202, expanding element C2The first connecting terminal 321, expanding element C4The first connecting terminal 341 ...,
And with expanding element CnThe first connecting terminal 3n1 be connected；The third connecting terminal 203 and expanding element C of headend unit B1's
Third connecting terminal 313 is connected, expanding element C1The second connecting terminal 312 and expanding element C2Third connecting terminal 323
It is connected, expanding element C2The second connecting terminal 322 and expanding element C3Third connecting terminal 333 be connected ... ..., extension is single
First Cn-1The second connecting terminal 3 (n-1) 2 and expanding element CnThird connecting terminal 3n3 be connected；
When n is odd number, as shown in Figure 11 (b), the second connecting terminal 102 and headend unit B's of train operation unit A
Second connecting terminal 202, expanding element C2The first connecting terminal 321, expanding element C4The first connecting terminal 341 ...,
And with expanding element Cn-13 (n-1) 1 of the first connecting terminal be connected；The third connecting terminal 203 of headend unit B and extension are single
First C1Third connecting terminal 313 be connected, expanding element C1The second connecting terminal 312 and expanding element C2Third terminals
Son 323 is connected, expanding element C2The second connecting terminal 322 and expanding element C3Third connecting terminal 333 be connected ... ..., expand
Open up unit Cn-1The second connecting terminal 3 (n-1) 2 and expanding element CnThird connecting terminal 3n3 be connected.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with scope of protection of the claims
Subject to.
The content not being described in detail in this specification belongs to the prior art well known to professional and technical personnel in the field.
Claims (9)
1. a kind of DC traction system track potential and stray electrical current dynamic analog device characterized by comprising train operation
Unit A, headend unit B, expanding element C, the first ground unit D1With the second ground unit D2；
The first ground unit D1With the second ground unit D2Belong to ground unit；
The first connecting terminal (101) of the train operation unit A is connected with train (6)；
The second connecting terminal (102) of the train operation unit A is connected with the second connecting terminal (202) of headend unit B；
The third connecting terminal (103) of the train operation unit A is grounded；
The 4th connecting terminal (104) and the first connecting terminal (201) of headend unit B of the train operation unit A, extension are single
The first connecting terminal (301) of first C is connected；
The third connecting terminal (203) of the headend unit B is connected with the third connecting terminal (303) of expanding element C；
The 4th connecting terminal (204) of the headend unit B is connected with the negative pole end (402) of the first DC traction substation (4),
The negative pole end (402) of first DC traction substation (4) is connected to the first ground unit D1；
The second connecting terminal (302) of the expanding element C is connected with the negative pole end (502) of the second DC traction substation (5),
The negative pole end (502) of second DC traction substation (5) is connected to the second ground unit D2；
The positive terminal (401) of first DC traction substation (4) is connected to positive voltage feed line (7), the second DC traction power transformation
The positive terminal (501) of institute (5) is connected to positive voltage feed line (7)；
The positive voltage feed line (7) is connected with train (6).
2. DC traction system track potential as described in claim 1 and stray electrical current dynamic analog device, it is characterised in that:
The train operation unit A includes: controllable resistor device (8), controllable resistor device (9) and a ground resistance Rg；
The controllable resistor device (8) and controllable resistor device (9) belong to controllable resistor device；
The first connecting terminal (801) of the controllable resistor device (8) constitutes the 4th connecting terminal of train operation unit A
(104), first connecting terminal, ground connection electricity of the second connecting terminal 802 of controllable resistor device (8) with controllable resistor device (9)
Hinder RgFirst terminal be connected, constitute train operation unit A the first connecting terminal (101), the second of controllable resistor device (9)
Connecting terminal constitutes the second connecting terminal (102) of train operation unit A, ground resistance RgSecond terminal constitute train operation
The third connecting terminal (103) of unit A.
3. DC traction system track potential as described in claim 1 and stray electrical current dynamic analog device, it is characterised in that:
The headend unit B includes: switch S21, switch S22, switch S23With the first resistance value fixed resistance R21；
The switch S21First terminal constitute headend unit B the first connecting terminal (201), switch S21Second terminal and the
One resistance value fixed resistance R21First terminal be connected, constitute the 4th connecting terminal (204) of headend unit B, the first resistance value fixes
Resistance R21Second terminal and switch S22First terminal be connected, switch S22Second terminal and switch S23Second terminal phase
Even, the third connecting terminal (203) of headend unit B, switch S are constituted23First terminal constitute headend unit B the second terminals
Sub (202).
4. DC traction system track potential as described in claim 1 and stray electrical current dynamic analog device, it is characterised in that:
The expanding element C includes: switch S31, switch S32With the second resistance value fixed resistance R31；
The second resistance value fixed resistance R31First terminal constitute expanding element C third connecting terminal (303), the second resistance value
Fixed resistance R31Second terminal and switch S32First terminal be connected, switch S32Second terminal and switch S31Second end
Son is connected, and constitutes the second connecting terminal (302) of expanding element C, switch S31First terminal constitute first connecing for expanding element C
Line terminals (301).
5. DC traction system track potential as described in claim 1 and stray electrical current dynamic analog device, it is characterised in that:
The ground unit be controllable resistor device with connect or a resistance value fixed resistance with connect or two poles
Pipe with connect, or be directly grounded.
6. the DC traction system track potential and stray electrical current dynamic analog device, feature as described in claim 2 or 5 exist
In: the controllable resistor device includes: capacitor C, inductance L, resistance R, resistance RCWith switch T；
The first terminal of the capacitor C constitutes the first connecting terminal of controllable resistor device, the Second terminal and resistance R of capacitor CC
First terminal be connected, resistance RCSecond terminal constitute the second connecting terminal of controllable resistor device, the switch T and resistance
R is in parallel, and inductance L is connected between the first terminal of capacitor C and the first terminal of switch T, the Second terminal and resistance R of switch TC
Second terminal be connected.
7. DC traction system track potential as claimed in claim 3 and stray electrical current dynamic analog device, it is characterised in that:
The switch S21, switch S22, switch S23, switch S31With switch S32It is two-way controllable switch.
8. DC traction system track potential as claimed in claim 6 and stray electrical current dynamic analog device, it is characterised in that:
The switch T is two-way controllable switch.
9. DC traction system track potential as described in claim 1 and stray electrical current dynamic analog device, it is characterised in that:
The quantity of expanding element C is n in the DC traction system track potential and stray electrical current dynamic analog device, and the n is whole
Number, wherein 0≤n < 50；
As n=0, there is no headend unit B and expanding element C, the second connecting terminal (102) of train operation unit A and the
The negative pole end (502) of two DC traction substations (5) is connected；The 4th connecting terminal (104) of train operation unit A is straight with first
The negative pole end (402) for flowing traction substation (4) is connected；
As n >=2, third connecting terminal (203) phase of the third connecting terminal (303) and headend unit B of the first expanding element C
Even, the third connecting terminal of subsequent adjacent extension unit C is connected with the second connecting terminal of previous expanding element C；The last one
The second connecting terminal (302) of expanding element C is connected with the negative pole end (502) of the second DC traction substation (5)；Train operation
The 4th connecting terminal (104) and N of unit A1The first connecting terminal of a expanding element C is connected；The of train operation unit A
Two connecting terminals (102) and N2The first connecting terminal of a expanding element C is connected, wherein N1For odd number, and 0≤N1< 50, N2
For even number, and 0≤N2<50。
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| CN113212254A (en) * | 2021-06-10 | 2021-08-06 | 贵州电网有限责任公司 | Method for reducing urban rail transit rail potential by considering train station approaching time |
| CN113408093A (en) * | 2021-06-29 | 2021-09-17 | 西南交通大学 | Capacitive blocking device configuration optimization method based on genetic algorithm |
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