CN107834525B - A kind of protection system and method for rail traffic multithread power supply system - Google Patents
A kind of protection system and method for rail traffic multithread power supply system Download PDFInfo
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- CN107834525B CN107834525B CN201711146240.2A CN201711146240A CN107834525B CN 107834525 B CN107834525 B CN 107834525B CN 201711146240 A CN201711146240 A CN 201711146240A CN 107834525 B CN107834525 B CN 107834525B
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- circuit breaker
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
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Abstract
The invention discloses a kind of protection systems of rail traffic multithread power supply system; when locomotive is run from Alternating Current Power Supply area to direct current supply area; if locomotive is not turned off the AC circuit breaker of itself before beginning through the first isolated area, controller can control dc circuit breaker according to the output signal of AC current sensor and disconnect.Even if also failing to stop in time in this way, locomotive fails to disconnect the AC circuit breaker of itself in time, it will not be directly entered exchange main circuit due to direct current and be damaged.Similarly, when locomotive is run from DC area to exchanging area, locomotive will not be directly entered direct current main circuit due to alternating current and is damaged.It can be seen that can avoid making mistakes due to staff or train faults itself cannot switch main circuit in time and the impaired situation of locomotive occurs, reduce loss during locomotive switches power supply grid using this protection system.In addition, the invention also discloses a kind of guard method of rail traffic multithread power supply system, effect is as above.
Description
Technical field
The present invention relates to field of track traffic, in particular to the protection system of a kind of rail traffic multithread power supply system and
Method.
Background technique
In recent years, as China's electric railway technology constantly develops to high speed and overload direction, the electrified iron in China
The progress of road technology has obtained the extensive concern of countries in the world.
Currently, the multithread power supply system of China's electric locomotive needs trainman when completing the switching of power supply grid
Coordinated with surface power supply administrative staff by radio station, it is easy to because of trainman or surface power supply administrative staff,
Or locomotive itself failure and keep locomotive impaired, bring massive losses.It is with AC25KV/DC3KV multithread power supply system below
Example is illustrated.Fig. 1 is the schematic diagram of existing AC25KV/DC3KV multithread power supply system.As shown in Figure 1, AC25KV/
DC3KV multithread power supply system is divided into AC25KV service area 10, the public service area 11 of AC25KV, DC3KV and DC3KV service area
12, wherein AC25KV service area 10 provides the alternating current of 25KV, and a permission locomotive is run under AC mode, AC25KV,
The public service area 11 of DC3KV can both provide the alternating current of 25KV, can also provide the direct current of 3KV, allow AC25KV/
DC3KV double-current system locomotive operation, DC3KV service area 12 provide 3KV direct current, and a permission locomotive is run under DC mode.?
When switching power supply grid, after AC circuit breaker CB1 is closed by surface personnel, trainman is by locomotive by AC25KV service area
10 operations are to the public service area 11 of AC25KV, DC3KV, and the preparation switching main circuit that stops, and surface personnel is by alternating current interruption
Device CB1 is disconnected, and after main circuit is switched to DC3KV power supply by trainman, surface personnel is again by dc circuit breaker CB2
Closure, completes the switching of power supply grid.In this handoff procedure, if locomotive is not cut by regulation parking or main circuit not successfully
It changes, then 3KV direct current can be made to flow directly into tractive transformer primary side winding, tractive transformer is caused to break down because of overheat,
Even explode.On the contrary, if it is during switching to Alternating Current Power Supply net from direct current supply net, then it can be due to 25KV alternating current
It is directly entered locomotive direct current main circuit, causes locomotive direct current arrester and traction convertor because over-voltage is burnt.
Therefore, it how during locomotive switches power supply grid, avoids making mistakes due to staff or train is die certainly
Barrier causes locomotive that cannot switch main circuit in time and the impaired situation of locomotive occurs, and reducing loss is that those skilled in the art are current
The technical issues that need to address.
Summary of the invention
The object of the present invention is to provide a kind of protection system and methods of rail traffic multithread power supply system, cut in locomotive
During changing power supply grid, it can be avoided since staff's fault or train faults itself cause locomotive that cannot switch in time
Main circuit and there is the impaired situation of locomotive, reduce loss.
In order to solve the above technical problem, the present invention provides a kind of rail traffic multithread power supply system protection system
System, comprising:
It is set to the first Alternating Current Power Supply line and the second Alternating Current Power Supply line of the first isolated area two sides, is set to the second isolated area
The first direct current supply line and the second direct current supply line of two sides, second direct current supply line are handed over by insulator and described second
Flow supply lines connection；
The AC current sensor that both ends are connect with the first Alternating Current Power Supply line and the second Alternating Current Power Supply line respectively,
The DC current sensor connecting respectively with first direct current supply line and second direct current supply line with both ends, is used to
Monitor the primary current signal of locomotive；
The AC circuit breaker being connected between the first Alternating Current Power Supply line and communication power supply；It is connected to described first
Dc circuit breaker between direct current supply line and DC power supply；
With the AC current sensor, the DC current sensor, the AC circuit breaker and the direct current interruption
The controller of device connection, for controlling the opening and closing of the AC circuit breaker and the dc circuit breaker.
It preferably, further include conductor between second direct current supply line and the second Alternating Current Power Supply line；
The conductor ground connection；
The second Alternating Current Power Supply line is connect by first insulator with the conductor, and the conductor passes through second insulator
It is connect with second direct current supply line；
Wherein, the insulator includes the first insulator and the second insulator.
Preferably, the AC circuit breaker is specially vacuum circuit breaker.
Preferably, the dc circuit breaker is specially speed vacuum circuit breaker.
In order to solve the above-mentioned technical problem, the present invention also provides a kind of rail traffic multithread power supply system protection side
Method is based on the described in any item protection systems of claim 1-4, comprising:
When locomotive passes through the first isolated area or the second isolated area, the primary side electricity of the locomotive is obtained using current sensor
Flow signal；
Judge whether the corresponding current value of the primary current signal is greater than preset value；
If it is, control breaker disconnects.
Preferably, when the primary current signal is the first primary current signal, the judgement primary current letter
Whether number corresponding current value is greater than preset value specifically:
Judge whether the corresponding current value of the first primary current signal is greater than the first preset value；
Then corresponding, the control breaker disconnects specifically: control dc circuit breaker disconnects；
Wherein, the first primary current signal are as follows: when the locomotive is by first isolated area, alternating current is spread
The primary current signal for the locomotive that sensor is got；The preset value includes first preset value.
Preferably, when the primary current signal is the second primary current signal, the judgement primary current letter
Whether number corresponding current value is greater than preset value specifically:
Judge whether the corresponding current value of the second primary current signal is greater than the second preset value；
Then corresponding, the control breaker disconnects specifically: control AC circuit breaker disconnects；
Wherein, the second primary current signal are as follows: when the locomotive is by second isolated area, direct current is spread
The primary current signal for the locomotive that sensor is got, the preset value include second preset value.
Preferably, the control breaker disconnects specifically:
Control dc circuit breaker and AC circuit breaker simultaneously switch off.
Preferably, in the locomotive after first isolated area or second isolated area, the guard method
Further include:
The storing electrical energy of the locomotive is obtained using the conductor of ground connection.
Preferably, the breaker is specially vacuum circuit breaker or speed vacuum circuit breaker.
Using the protection system of rail traffic multithread power supply system provided by the invention, when locomotive from Alternating Current Power Supply area to
When direct current supply area is run, if locomotive is not turned off certainly before entering the second Alternating Current Power Supply line by the first Alternating Current Power Supply line
First Alternating Current Power Supply line and the second Alternating Current Power Supply line can then be shorted, lead to the primary current meeting of locomotive by the AC circuit breaker of body
Greater than certain value, i.e. corresponding change can occur for the output signal of AC current sensor, and controller can be spread according to alternating current
The output signal of sensor determines that locomotive disconnects the AC circuit breaker of itself not in time, and controls dc circuit breaker and disconnect so that direct current
It is connectionless between power supply and the first direct current supply line, and then reach and make the uncharged purpose of the first direct current supply line.In this way,
Even if locomotive fails to disconnect the AC circuit breaker of itself in time, also fail to stop in time, locomotive will not be direct due to direct current
It is damaged into exchange main circuit.Similarly, when locomotive is run from DC area to exchanging area, even if locomotive fails to disconnect in time certainly
The dc circuit breaker of body also fails to stop in time, and locomotive will not be directly entered direct current main circuit due to alternating current and is damaged.By
This is as it can be seen that the protection system using rail traffic multithread power supply system provided by the invention can switch power supply grid in locomotive
During, it avoids making mistakes due to staff or train faults itself causes locomotive that cannot switch main circuit in time and machine occurs
The impaired situation of vehicle, reduces loss.In addition, the present invention also provides a kind of protection sides of rail traffic multithread power supply system
Method, effect are as above.
Detailed description of the invention
In order to illustrate the embodiments of the present invention more clearly, attached drawing needed in the embodiment will be done simply below
It introduces, it should be apparent that, drawings in the following description are only some embodiments of the invention, for ordinary skill people
For member, without creative efforts, it can also be obtained according to these attached drawings other accompanying drawings.
Fig. 1 is the schematic diagram of existing AC25KV/DC3KV multithread power supply system；
Fig. 2 is a kind of structural representation of the protection system of rail traffic multithread power supply system provided in an embodiment of the present invention
Figure；
Fig. 3 is that the structure of the protection system of another rail traffic multithread power supply system provided in an embodiment of the present invention is shown
It is intended to；
Fig. 4 is a kind of flow chart of the guard method of rail traffic multithread power supply system provided in an embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, rather than whole embodiments.Based on this
Embodiment in invention, those of ordinary skill in the art under the premise of not making the creative labor, it is obtained it is all its
His embodiment, belongs to the scope of the present invention.
The object of the present invention is to provide a kind of protection system and methods of rail traffic multithread power supply system, cut in locomotive
During changing power supply grid, it can be avoided since staff's fault or train faults itself cause locomotive that cannot switch in time
Main circuit and there is the impaired situation of locomotive, reduce loss.
In order to make those skilled in the art better understand technical solution of the present invention, with reference to the accompanying drawing and it is embodied
The present invention is described in further detail for mode.
Fig. 2 is a kind of structural representation of the protection system of rail traffic multithread power supply system provided in an embodiment of the present invention
Figure.As shown in Fig. 2, this protection system includes:
It is set to the first Alternating Current Power Supply line 201 and the second Alternating Current Power Supply line 202 of 20 two sides of the first isolated area, is set to
The first direct current supply line 211 and the second direct current supply line 212 of two isolated areas, 21 two sides, the second direct current supply line 212 pass through exhausted
Edge body 22 is connect with the second Alternating Current Power Supply line 202；
The AC current sensor that both ends are connect with the first Alternating Current Power Supply line 201 and the second Alternating Current Power Supply line 202 respectively
203 and the DC current sensor 213 that is connect respectively with the first direct current supply line 211 and the second direct current supply line 212 of both ends,
It is used to the primary current signal of monitoring locomotive；
The AC circuit breaker 204 being connected between the first Alternating Current Power Supply line 201 and communication power supply 200；It is connected to
Dc circuit breaker 214 between one direct current supply line 211 and DC power supply 210；
Connect with AC current sensor 203, DC current sensor 213, AC circuit breaker 204 and dc circuit breaker 214
The controller 23 connect, for controlling the opening and closing of AC circuit breaker 204 and dc circuit breaker 214.
Wherein, the first isolated area 20 is used to disconnect the company between the first Alternating Current Power Supply line 201 and the second Alternating Current Power Supply line 202
Connect, i.e., so that between the first Alternating Current Power Supply line 201 and the second Alternating Current Power Supply line 202 without conductor connect when, although first
Alternating Current Power Supply line 201 charges, but the second Alternating Current Power Supply line 202 and not charged.Second isolated area 21 is supplied for disconnecting the first direct current
Connection between electric wire 211 and the second direct current supply line 212, i.e., so that in the first direct current supply line 211 and the second direct current supply
Between line 212 without conductor connect when, although the first direct current supply line 211 charge, the second direct current supply line 212 and without
Electricity.In addition, it is necessary to explanation, the setting of the first isolated area 20 and the second isolated area 21 have no effect on locomotive normal through.
Insulator 22 belongs to the non-Electric region in this protection system, and each energy storage device for guaranteeing in locomotive reliably discharges.
Obviously, what insulator 22 was arranged is longer, more can guarantee that each energy storage device in locomotive reliably discharges.However, it is noteworthy that
If locomotive drives towards direct current supply area by Alternating Current Power Supply area, and locomotive is before beginning through the first isolated area 20, disconnected in time
The main circuit breaker (AC circuit breaker) for having opened itself, then after locomotive sails out of the first Alternating Current Power Supply line 201, the second Alternating Current Power Supply
Line 202 can not also continue as locomotive and provide alternating current, and locomotive needs to cross non-Electric region by self inertia, if non-Electric region is arranged
It is too long, train possibly can not reach direct current supply area and just stop.Similarly, if locomotive has direct current supply, Alternating Current Power Supply is driven towards in area
Area, and locomotive is disconnected the main circuit breaker (dc circuit breaker) of itself, then before beginning through the second isolated area 21 in time
After locomotive sails out of the first direct current supply line 211, the second direct current supply line 212 can not also continue as locomotive and provide direct current,
Locomotive needs to cross non-Electric region by the inertia of itself, if non-Electric region setting is too long, train possibly can not reach exchange and supply
It just stops in electric area.Therefore, the length of insulator 22 should not be also arranged too long.It certainly, can be according to actual conditions in concrete application
The specific length of insulator 22 is set, and the present invention is without limitation.
In the concrete application of protection system, if locomotive drives towards direct current supply area by Alternating Current Power Supply area, and locomotive exists
During by the first isolated area 20, it is not turned off the main circuit breaker (AC circuit breaker) of itself, then locomotive is equivalent to
The first Alternating Current Power Supply line 201 and the second Alternating Current Power Supply line 202 can be connected for conductor, in the feelings of the first Alternating Current Power Supply line 201 electrification
Under condition, the second Alternating Current Power Supply line 202 can also be charged, and can be continued as locomotive and be continued to provide AC power source, at this point, the primary side of locomotive
Electric current is not zero, and is more than certain value.In other words, if locomotive drives towards direct current supply area by Alternating Current Power Supply area, and locomotive exists
During by the first isolated area 20, it is not turned off the main circuit breaker (AC circuit breaker) of itself, then the first Alternating Current Power Supply
Line 201, locomotive, the second Alternating Current Power Supply line 202 and AC current sensor 203 will form circuit.In this way, ac current sensor
Device 203 can monitor the primary current signal of locomotive, and export output signal corresponding with the primary current size of locomotive
To controller 23.Controller 23 can determine the primary side electricity of locomotive after receiving the output signal according to the output signal
Whether stream is more than certain value, so that it is determined that locomotive is before beginning through the first isolated area 20 out, if be disconnected itself in advance
Main circuit breaker (alternating current circuit device), also, when the primary current determined is more than certain value, controller 23 is to direct current interruption
The output control signal of device 214, control dc circuit breaker 214 disconnect, and cut off the first direct current supply line 211 and DC power supply
Connection between 210 is compeled so that the first direct current supply line 211 and the second direct current supply line 212 can not provide direct current for locomotive
Locomotive noenergy is set to supply and stop.I.e. when determine locomotive before beginning through the first isolated area 20, not in advance disconnect from
When main circuit breaker (the alternating current circuit device) of body, dc circuit breaker 214 is controlled by controller 23 and is disconnected so that locomotive and
When switching main circuit in the case where, even if without stopping in time, will not due to service area it is instantaneous switching cause locomotive be damaged,
And then it less can lose.
Similarly, if locomotive drives towards Alternating Current Power Supply area by direct current supply area, and locomotive is passing through the second isolated area 21
In the process, it is not turned off the main circuit breaker (dc circuit breaker) of itself, then DC current sensor 213 can monitor locomotive
Primary current signal, and output signal corresponding with the primary current size of locomotive is exported to controller 23, controller 23 is true
When making the primary current of locomotive more than certain value, control signal is exported to AC circuit breaker 204, controls AC circuit breaker 204
It disconnects, the connection between the first Alternating Current Power Supply line 201 and communication power supply 200 is cut off, so that 201 He of the first Alternating Current Power Supply line
Second Alternating Current Power Supply line 202 can not provide alternating current for locomotive, and locomotive noenergy is forced to supply and stop.I.e. when determining that locomotive exists
Before beginning through the second isolated area 21, when not disconnecting main circuit breaker (the alternating current circuit device) of itself in advance, pass through controller
23 control AC circuit breakers 204 disconnect so that locomotive it is switch main circuit in time in the case where, even if not stopping in time
It is impaired will not to lead to locomotive due to the instantaneous switching of service area, and then less can lose for vehicle.
In conclusion working as machine using the protection system of rail traffic multithread power supply system provided in an embodiment of the present invention
When vehicle is run from Alternating Current Power Supply area to direct current supply area, if locomotive is entering the second Alternating Current Power Supply by the first Alternating Current Power Supply line
The AC circuit breaker of itself is not turned off before line, then the first Alternating Current Power Supply line and the second Alternating Current Power Supply line can be shorted by locomotive,
Certain value can be greater than by leading to the primary current of locomotive, i.e. corresponding change can occur for the output signal of AC current sensor, control
Device can determine that locomotive disconnects the AC circuit breaker of itself not in time according to the output signal of AC current sensor, and control straight
It flows breaker to disconnect so that connectionless between DC power supply and the first direct current supply line, and then reaches and make the first direct current supply
The uncharged purpose of line.In this way, also fail to stop in time even if locomotive fails to disconnect the AC circuit breaker of itself in time, locomotive
It will not be directly entered exchange main circuit due to direct current and be damaged.Similarly, when locomotive is run from DC area to exchanging area, i.e.,
Make locomotive fail to disconnect the dc circuit breaker of itself in time, also fails to stop in time, locomotive will not be tapped into due to alternating current direct
Enter direct current main circuit and is damaged.It can be seen that using the protection system of rail traffic multithread power supply system provided by the invention
It can avoid making mistakes due to staff or train faults itself causes locomotive cannot during locomotive switches power supply grid
Switch main circuit in time and the impaired situation of locomotive occur, reduces loss.
Fig. 3 is that the structure of the protection system of another rail traffic multithread power supply system provided in an embodiment of the present invention is shown
It is intended to.As shown in figure 3, it is preferably carried out mode as one kind, and on the basis of Fig. 2, this protection system further include: conductor 30.
Conductor 30 is grounded；
Second Alternating Current Power Supply line 202 is connect by first insulator 221 with conductor 30, and conductor 30 passes through second insulator
222 connect with the second direct current supply line 212；
Wherein, insulator 22 includes first insulator 221 and second insulator 222.
Protection system provided in this embodiment, setting ground connection leads between first insulator 221 and second insulator 222
Body 30 can accelerate each energy storage device release electric energy in locomotive that is, each energy storage device of locomotive is connect with the earth,
It thereby further ensures that the reliable electric discharge of each energy storage component in locomotive, increases the reliability of protection system.
In order to the cost of protection system be further decreased, as one in the case where guaranteeing the function admirable of protection system
Kind is preferably carried out mode, and AC circuit breaker 204 is specially vacuum circuit breaker.
In order to the cost of protection system be further decreased, as another in the case where guaranteeing the function admirable of protection system
One kind being preferably carried out mode, and dc circuit breaker 214 is specially speed vacuum circuit breaker.
Above for a kind of embodiment progress of the protection system of rail traffic multithread power supply system provided by the invention
Detailed description, the present invention also provides a kind of guard methods corresponding with the protection system, due to the implementation of components of system as directed
Example and the embodiment of method part mutually correlate, because the embodiment of the method part refers to retouching for the embodiment of components of system as directed
It states, wouldn't repeat here.
Fig. 4 is a kind of flow chart of the guard method of rail traffic multithread power supply system provided in an embodiment of the present invention.
The protection system that this guard method is provided based on any of the above-described kind of embodiment, as shown in Figure 4, comprising:
S40: when locomotive passes through the first isolated area or the second isolated area, the primary side electricity of locomotive is obtained using current sensor
Flow signal.
Wherein, current sensor includes AC current sensor and DC communication sensor.
S41: judging whether the corresponding current value of primary current signal is greater than preset value, if it is, entering step S42.
If it is determined that the corresponding current value of primary current signal is less than preset value, then breaker can be kept to be in original
Working condition.Certainly, if preventing from controlling in order to which locomotive is in the case where no main circuit not parking in time of switching in time
Device cannot timely cut-off breaker, breaker can also be made to be in an off state before train switches power supply grid, it is former determining
After current signal corresponding current value in side is less than preset value, then control breaker closing.Wherein, preset value is preset,
Need to guarantee that its numerical value is centainly less than the primary current when locomotive does not disconnect the breaker of itself in time.Certainly, specific
The setting of numerical value can determine that the present invention is without limitation according to actual conditions.
S42: control breaker disconnects.
Wherein, breaker includes dc circuit breaker and AC circuit breaker.For step S42, control direct current can be
A disconnection in breaker and AC circuit breaker, is also possible to control dc circuit breaker and AC circuit breaker simultaneously switches off.When
So, for the case where only controlling in dc circuit breaker and AC circuit breaker disconnection, if it is ac current sensor
The corresponding primary current value of output signal of device output is greater than preset value, then controls dc circuit breaker disconnection；And if direct current
The corresponding primary current value of output signal of flow sensor output is greater than preset value, then controls AC circuit breaker disconnection.
It can be seen that using the guard method of rail traffic multithread power supply system provided in this embodiment, when locomotive from
Alternating Current Power Supply area to direct current supply area run when, if locomotive by the first Alternating Current Power Supply line enter the second Alternating Current Power Supply line it
Before be not turned off itself AC circuit breaker, the first Alternating Current Power Supply line and the second Alternating Current Power Supply line can be shorted, lead to locomotive
Primary current can be greater than certain value, and since guard method provided in this embodiment can utilize AC current sensor monitoring machine
The primary current signal of vehicle, so corresponding change can also occur for the output signal of AC current sensor, controller then can be according to
Determine whether the primary current of locomotive is greater than preset value according to the output signal of AC current sensor, if it is, illustrating machine
Vehicle disconnects the AC circuit breaker of itself not in time, then can control dc circuit breaker disconnect so that DC power supply with first directly
It flows connectionless between supply lines, and then reaches and make the uncharged purpose of the first direct current supply line.In this way, even if locomotive fails in time
The AC circuit breaker for disconnecting itself also fails to stop in time, locomotive will not be directly entered due to direct current exchange main circuit and
It is impaired.Similarly, when locomotive is run from DC area to exchanging area, even if locomotive fails to disconnect the dc circuit breaker of itself in time,
It also fails to stop in time, locomotive will not be directly entered direct current main circuit due to alternating current and is damaged.It can be seen that using this hair
The protection system of the rail traffic multithread power supply system of bright offer can locomotive switch power supply grid during, avoid by
Cause locomotive that cannot switch main circuit in time in staff's fault or train faults itself and the impaired situation of locomotive occur, subtracts
Few loss.
In order to reduce influence of the protection system to rail traffic multithread power supply system when protecting system acting, as
One kind being preferably carried out mode, when primary current signal is the first primary current signal, judges that primary current signal is corresponding
Whether current value is greater than preset value specifically: it is default to judge whether the corresponding current value of the first primary current signal is greater than first
Value；Then corresponding, control breaker disconnects specifically: control dc circuit breaker disconnects.
Wherein, the first primary current signal are as follows: when locomotive passes through the first isolated area, what AC current sensor was got
The primary current signal of locomotive；Preset value includes the first pre- preset value.First preset value be it is preset, be such as set as 2A,
Certainly, the first preset value can be set according to specific actual conditions, and the present invention is without limitation.
In order to reduce influence of the protection system to rail traffic multithread power supply system when protecting system acting, as
Another kind is preferably carried out mode, when primary current signal is the second primary current signal, judges that primary current signal is corresponding
Current value whether be greater than preset value specifically: it is default to judge whether the corresponding current value of the second primary current signal is greater than second
Value；Then corresponding, control breaker disconnects specifically: control AC circuit breaker disconnects.
Wherein, the second primary current signal are as follows: when locomotive passes through the second isolated area, what DC current sensor was got
The primary current signal of locomotive, preset value include the second preset value.It is preset when the second preset value, such as it is set as 10A, when
So, the second preset value can be set according to specific actual conditions, and the present invention is without limitation.
In order to guarantee the reliability of guard method provided in an embodiment of the present invention, it is preferably carried out mode as another kind,
It controls breaker to disconnect specifically: control dc circuit breaker and AC circuit breaker simultaneously switch off.
In order to further ensure that the reliable electric discharge of each energy storage component in locomotive, increase the reliability of guard method, as
One kind being preferably carried out mode, in locomotive after the first isolated area or the second isolated area, further includes: utilize the conductor of ground connection
Obtain the storing electrical energy of locomotive.
In order to further decrease the application cost of guard method in the case where guaranteeing the function admirable of protection system, make
It is preferably carried out mode for another kind, breaker is specially vacuum circuit breaker or speed vacuum circuit breaker.
A kind of protection system and method for rail traffic multithread power supply system provided by the present invention is carried out above
It is discussed in detail.Each embodiment is described in a progressive manner in specification, and each embodiment, which stresses, is and other realities
The difference of example is applied, the same or similar parts in each embodiment may refer to each other.
It should be pointed out that for those skilled in the art, without departing from the principle of the present invention,
Can be with several improvements and modifications are made to the present invention, these improvement and modification also fall into the protection scope of the claims in the present invention
It is interior.
It should also be noted that, in the present specification, such as first and second etc relational terms are used merely to one
A entity or operation are perhaps operated with another entity and are distinguished without necessarily requiring or implying these entities or behaviour
There are any actual relationship or orders between work.Moreover, the terms "include", "comprise" or its any variant are intended to
Cover non-exclusive inclusion, so that the process, method, article or equipment for including a series of element not only includes that
A little elements, but also other elements including being not explicitly listed either further include for this process, method, article or setting
Standby intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in the process, method, article or apparatus that includes the element.
Claims (10)
1. a kind of protection system of rail traffic multithread power supply system characterized by comprising
It is set to the first Alternating Current Power Supply line and the second Alternating Current Power Supply line of the first isolated area two sides, is set to the second isolated area two sides
The first direct current supply line and the second direct current supply line, second direct current supply line with described second exchanges confession by insulator
Electric wire connection；
The AC current sensor and two that both ends are connect with the first Alternating Current Power Supply line and the second Alternating Current Power Supply line respectively
The DC current sensor connecting respectively with first direct current supply line and second direct current supply line is held, is used to monitor
The primary current signal of locomotive；
The AC circuit breaker being connected between the first Alternating Current Power Supply line and communication power supply；It is connected to first direct current
Dc circuit breaker between supply lines and DC power supply；
Connect with the AC current sensor, the DC current sensor, the AC circuit breaker and the dc circuit breaker
The controller connect, for controlling the opening and closing of the AC circuit breaker and the dc circuit breaker.
2. protection system according to claim 1, which is characterized in that second direct current supply line is exchanged with described second
It further include conductor between supply lines；
The conductor ground connection；
The second Alternating Current Power Supply line is connect by first insulator with the conductor, and the conductor passes through second insulator and institute
State the connection of the second direct current supply line；
Wherein, the insulator includes the first insulator and the second insulator.
3. protection system according to claim 1 or 2, which is characterized in that the AC circuit breaker is specially vacuum circuit breaker
Device.
4. protection system according to claim 3, which is characterized in that the dc circuit breaker is specially high-speed vacuum open circuit
Device.
5. a kind of guard method of rail traffic multithread power supply system, based on the described in any item protection systems of claim 1-4
System characterized by comprising
When locomotive passes through the first isolated area or the second isolated area, believed using the primary current that current sensor obtains the locomotive
Number；
Judge whether the corresponding current value of the primary current signal is greater than preset value；
If it is, control breaker disconnects, the breaker includes dc circuit breaker and/or AC circuit breaker.
6. guard method according to claim 5, which is characterized in that when the primary current signal is the first primary current
It is described to judge whether the corresponding current value of the primary current signal is greater than preset value when signal specifically:
Judge whether the corresponding current value of the first primary current signal is greater than the first preset value；
Then corresponding, the control breaker disconnects specifically: control dc circuit breaker disconnects；
Wherein, the first primary current signal are as follows: when the locomotive is by first isolated area, AC current sensor
The primary current signal of the locomotive got；The preset value includes first preset value.
7. guard method according to claim 5, which is characterized in that when the primary current signal is the second primary current
It is described to judge whether the corresponding current value of the primary current signal is greater than preset value when signal specifically:
Judge whether the corresponding current value of the second primary current signal is greater than the second preset value；
Then corresponding, the control breaker disconnects specifically: control AC circuit breaker disconnects；
Wherein, the second primary current signal are as follows: when the locomotive is by second isolated area, DC current sensor
The primary current signal of the locomotive got, the preset value include second preset value.
8. guard method according to claim 5, which is characterized in that the control breaker disconnects specifically:
Control dc circuit breaker and AC circuit breaker simultaneously switch off.
9. according to the described in any item guard methods of claim 5-8, which is characterized in that the locomotive by described first every
After area or second isolated area, further includes:
The storing electrical energy of the locomotive is obtained using the conductor of ground connection.
10. guard method according to claim 9, which is characterized in that the AC circuit breaker is specially vacuum circuit breaker,
The dc circuit breaker is specially speed vacuum circuit breaker.
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| CN112339620B (en) * | 2020-10-28 | 2022-04-19 | 株洲中车时代电气股份有限公司 | Switching method and system for power supply modes of multi-system train and related components |
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