CN106329499B - DC earthing guard method for single track reflux power supply system - Google Patents
DC earthing guard method for single track reflux power supply system Download PDFInfo
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- CN106329499B CN106329499B CN201610886435.XA CN201610886435A CN106329499B CN 106329499 B CN106329499 B CN 106329499B CN 201610886435 A CN201610886435 A CN 201610886435A CN 106329499 B CN106329499 B CN 106329499B
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- substation
- feeder cabinet
- uplink
- power supply
- downlink
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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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/06—Details with automatic reconnection
- H02H3/066—Reconnection being a consequence of eliminating the fault which caused disconnection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/16—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to fault current to earth, frame or mass
-
- 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
- H02H7/268—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 for dc systems
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Abstract
The invention discloses a kind of DC earthing guard methods for single track reflux power supply system; step includes that single track reflux power supply system is independent four power supply sections according to the division of uplink and downlink or so syntople, is equipped with one for receiving the controller of DC earthing trip protection signal and control tripping or reclosing；When controller receives DC earthing trip protection signal; four power supply sections are made all to trip; reclosing successively is carried out for each power supply section simultaneously; and determine whether the power supply section breaks down according to DC earthing trip protection signal whether is still received after reclosing again; if a certain power supply section is broken down, the feeder cabinet in failure power supply section is tripped and is latched.The present invention not only can quickly determine and cut off fault section, can also restore the normal power supply in other fault-free sections automatically, improve the reliability and stability of power supply system, and also avoiding dc circuit breaker, reclosing causes equipment damage repeatedly.
Description
Technical field
The present invention relates to the DC earthing protection techniques of single track return-flow system, specifically disclose a kind of for single track reflux confession
The DC earthing guard method of electric system.
Background technique
In urban rail DC power-supply system, for opposite rail reflux power supply system, single track flows back power supply system can
It reduces stray electrical current harm, avoid to the interference based on track signaling system, therefore single track reflux power supply system cannot be only used for
Traditional metal wheel train, it can also be used to the train of rubber wheel, even magnetic-levitation train.For example, current Chongqing 2 line sit-astride
The magnetic-levitation train of low speed magnetic suspension train and Beijing in building is all made of single track reflux power supply system and supplies in monorail train, Changsha
Electricity.In single track reflux power supply system, to detect direct-flow positive pole ground fault, it is configured with DC earthing protective device, abbreviation 64D
Cabinet.When DC ground fault occurs, which issues trip signal, and our station and neighboring station feeder cabinet is made to trip and be latched.Therefore
Large-area power-cuts or even withdrawal of train are easily caused, the stabilization and safety of power supply system are seriously threatened.
In order to detect direct-flow positive pole ground fault, each transformer substation system configures a DC earthing protective device, and pacifies
Between negative electrode bus and the earth, by detecting voltage between the two, it is determined whether break down.When direct-flow positive pole and greatly
Ground is shorted (direct-flow positive pole and F rail of magnetic-levitation train are shorted), and voltage increases between the earth and negative electrode bus, and triggering DC earthing is protected
Protection unit issues protection signal.It is directed to the fault-signal at present, a kind of scheme is that so that our station and neighboring station is powered to the section straight
Feeder cabinet all tripping lockings are flowed, is powered by stopping, cutting off fault section；Another scheme be gradually start our station uplink,
Downlink reclosing judges according to fault-signal whether is received after uplink and downlink reclosing again and cuts off fault section.Because whole
The earth of a power supply system is electrically connected, negative electrode bus perforation, when direct-flow positive pole ground fault occurs for certain point, greatly with it is negative
Potential difference between pole increases, and the DC earthing protective device in the very wide range of fault point can detect the current potential
Difference, and the protection act that is triggered make corresponding continuous multiple substation's trippings.If the DC earthing in adjacent three substations
Protective device movement, then these three substations are both that protection output and protection receive.Both the above scheme is with individual
Substation is analysis object, has ignored influencing each other between adjacent substations, once DC ground fault occurs, it will be because of phase
Interlocking between adjacent substation causes the tripping of multiple substations to have a power failure, the stability of the power supply of city railway system seriously affected and reliable
Property.
As shown in Figure 1, RT1, RT2 are rectifier transformer in typical traction substation train traction power supply system；R1,R2
For rectifier；201,202 be incoming line cabinet；211 be the first downlink feeder cabinet, 213 be the second downlink feeder cabinet, and 212 be on first
Row feeder cabinet, 214 are the second uplink feeder cabinet；2011,2021,2211,2212,2213,2214 be cathode isolation knife；2111,
2131,2121,2141 be online isolation knife；2113,2124 be more area's isolation knife；64D is DC earthing protective device.City at present
Feeder cabinet in rail DC power-supply system is provided with reclosing function, when feeder cabinet is because of fault trip, can start reclosing, make to set
It is standby to close a floodgate again.The DC earthing protective device (64D cabinet) of typical single track reflux power supply system is mounted on negative electrode bus and big
Between ground, when certain direct-flow positive pole and the earth short circuit, potential difference, triggering DC earthing protection are being generated between the earth and cathode
Device action.Since entire power supply system the earth is electrically connected, each substation's uplink, the electrical connection of downgoing line negative electrode bus,
Therefore there is DC ground fault in any route, and the DC earthing protective device in the very wide range of fault point is ok
It detects the voltage difference and the protection act that is triggered, fault section is caused to be difficult to determine.
Summary of the invention
The technical problem to be solved by the present invention is in view of the above problems in the prior art, providing one kind can not only be quick
It determines and cuts off fault section, additionally it is possible to restore the normal power supply in other fault-free sections automatically, improve power supply system reliability
And stability, avoid dc circuit breaker repeatedly reclosing cause equipment damage for single track reflux power supply system DC earthing
Guard method.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention are as follows:
A kind of DC earthing guard method for single track reflux power supply system, step include:
1) by single track reflux each substation of power supply system power supply section according to up and down line and with adjacent power transformation
The left and right syntople division stood is independent four power supply sections, and four power supplies section includes left adjacent downlink interval, the right side
Adjacent downlink interval, left adjacent uplink interval and right adjacent uplink interval；One is equipped with for receiving the straight of DC earthing protective device 64D
Flow the feeder cabinet tripping of ground protection trip signal and control power supply section or the controller of reclosing；When the controller is received
When to DC earthing trip protection signal, execution step 2 is jumped；
2) controller, which issues whole trip signals, makes four power supplies section all trip, while the controller
Reclosing successively is carried out for each power supply section, and whether is still to receive DC earthing protective device according to after reclosing
The DC earthing trip protection signal of 64D determines whether the power supply section breaks down, if a certain power supply section occur therefore
The feeder cabinet in failure power supply section is then tripped and is latched by barrier.
Preferably, the single track reflux power supply system includes multiple substations, and the substation includes the feedback of the first downlink
Line cabinet 211, the first uplink feeder cabinet 212, the second downlink feeder cabinet 213 and the second uplink feeder cabinet 214, the left adjacent downlink
The feeder cabinet in section includes the first downlink feeder cabinet 211 of target substation and the second downlink feeder cabinet 213 of Zuo Lin substation,
The feeder cabinet of the right adjacent downlink interval includes under the second downlink feeder cabinet 213 of target substation and the first of You Lin substation
Row feeder cabinet 211, the feeder cabinet of the left adjacent uplink interval include that the first uplink feeder cabinet 212 of target substation and left neighbour become
The feeder cabinet of the second uplink feeder cabinet 214 in power station, the right adjacent uplink interval includes the second uplink feeder line of target substation
First uplink feeder cabinet 212 of cabinet 214 and You Lin substation.
Preferably, the detailed step of step 2 includes:
2.1) by the tripping of the corresponding target substation of DC earthing trip protection signal and its adjacent substations；
2.2) controller issues lower left line reclosing signal, starts the first downlink feeder cabinet 211 of target substation
With 213 reclosing of the second downlink feeder cabinet of Zuo Lin substation；
2.3) in 213 weight of the second downlink feeder cabinet of the first downlink feeder cabinet 211 and Zuo Lin substation of target substation
After combined floodgate, if controller does not receive the DC earthing trip protection signal of target substation in specified duration, a left side is determined
Adjacent downlink interval fault-free, and continue to jump and execute step 2.4)；Otherwise determine that left adjacent downlink interval is faulty, controller issues
Lower left line trip signal, by the second downlink feeder cabinet 213 of the first downlink feeder cabinet 211 and Zuo Lin substation of target substation
Tripping jumps and executes step 2.4)；
2.4) controller issues lower right line reclosing signal, starts the second downlink feeder cabinet 213 of target substation
With 211 reclosing of the first downlink feeder cabinet of You Lin substation；
2.5) in 211 weight of the first downlink feeder cabinet of the second downlink feeder cabinet 213 and You Lin substation of target substation
After combined floodgate, if controller does not receive the DC earthing trip protection signal of target substation in specified duration, the right side is determined
Adjacent downlink interval fault-free, and continue to jump and execute step 2.6)；Otherwise determine that right adjacent downlink interval is faulty, controller issues
Lower right line trip signal trips the second downlink feeder cabinet 213 of target substation, jumps and executes step 2.6)；
2.6) controller issues upper left line reclosing signal, starts the first uplink feeder cabinet 212 of target substation
With 214 reclosing of the second uplink feeder cabinet of Zuo Lin substation；
2.7) in 214 weight of the second uplink feeder cabinet of the first uplink feeder cabinet 212 of target substation and Zuo Lin substation
After combined floodgate, if controller does not receive the DC earthing trip protection signal of target substation in specified duration, a left side is determined
Adjacent uplink interval fault-free, and continue to jump and execute step 2.8)；Otherwise determine that left adjacent uplink interval is faulty, controller issues
Upper left line trip signal, by the second uplink feeder cabinet 214 of the first uplink feeder cabinet 212 of target substation and Zuo Lin substation
Tripping jumps and executes step 2.8)；
2.8) controller issues upper right line reclosing signal, starts the second uplink feeder cabinet 214 of target substation
With 212 reclosing of the first uplink feeder cabinet of You Lin substation；
2.9) in 212 weight of the first uplink feeder cabinet of the second uplink feeder cabinet 214 of target substation and You Lin substation
After combined floodgate, if controller does not receive the DC earthing trip protection signal of target substation in specified duration, the right side is determined
Adjacent uplink interval fault-free jumps and executes step 2.10)；Otherwise determine that right adjacent uplink interval is faulty, controller issues upper right
Row trip signal jumps the first uplink feeder cabinet 212 of the second uplink feeder cabinet 214 of target substation and You Lin substation
Lock jumps and executes step 2.10)；
2.10) terminate and exit.
Preferably, the length of the specified duration is 1~200s.
DC earthing guard method of the present invention for single track reflux power supply system has an advantage that the present invention by single track
Flow back each substation of power supply system power supply section according to up and down line and with the left and right syntople of adjacent substations
Division is independent four power supply sections, is equipped with a DC earthing protection for receiving DC earthing protective device 64D and jumps
The feeder cabinet tripping in lock signal and control power supply section or the controller of reclosing；It is jumped when controller receives DC earthing protection
When lock signal, controller, which issues whole trip signals, makes all trippings of four power supply sections, at the same controller be successively directed to it is each
Whether a power supply section carries out reclosing, and be still to receive the direct current of DC earthing protective device 64D to connect according to after reclosing
Ground trip protection signal determines whether the power supply section breaks down, if a certain power supply section is broken down, by failure
The feeder cabinet in power supply section trips and is latched, and can not only quickly determine and cut off fault section, additionally it is possible to restore other automatically
The normal power supply in fault-free section improves power supply system reliability and stability, and avoiding dc circuit breaker, reclosing causes repeatedly
Equipment damage.
Detailed description of the invention
Fig. 1 is the circuit theory schematic diagram of the typical single track reflux power supply system of the prior art.
Fig. 2 is the basic procedure schematic diagram of present invention method.
Fig. 3 is the circuit theory schematic diagram of continuous three station single track reflux power supply system in the embodiment of the present invention.
Fig. 4 is the input/output signal port schematic diagram of controller in the embodiment of the present invention.
Fig. 5 is the detailed process schematic diagram of step 2 of the present invention.
Specific embodiment
For single track flows back power supply system, although entire DC power-supply system relevance is strong, each service area
Between be completely independent.Hereafter by for continuous three substations (substation A~substation C), substation A~substation C includes
First downlink feeder cabinet 211, the first uplink feeder cabinet 212, the second downlink feeder cabinet 213 and the second uplink feeder cabinet 214, it is right
DC earthing guard method of the present invention for single track reflux power supply system is described in further detail.
As shown in Fig. 2, the step of DC earthing guard method of the present invention for single track reflux power supply system, includes:
1) by single track reflux each substation of power supply system power supply section according to up and down line and with adjacent power transformation
The left and right syntople division stood is independent four power supply sections, and four power supply sections include under left adjacent downlink interval, right neighbour
Row section, left adjacent uplink interval and right adjacent uplink interval；It is equipped with one and is connect for receiving the direct current of DC earthing protective device 64D
The feeder cabinet tripping in ground trip protection signal and control power supply section or the controller of reclosing；It is connect when controller receives direct current
When ground trip protection signal, execution step 2 is jumped；
2) controller, which issues whole trip signals, makes all trippings of four power supply sections, at the same controller be successively directed to it is each
Whether a power supply section carries out reclosing, and be still to receive the direct current of DC earthing protective device 64D to connect according to after reclosing
Ground trip protection signal determines whether the power supply section breaks down, if a certain power supply section is broken down, by failure
The feeder cabinet in power supply section trips and is latched.
With shown in Fig. 3, single track reflux power supply system includes 3 substations (substation A~substation C) in the present embodiment,
Substation includes the first downlink feeder cabinet 211, the first uplink feeder cabinet 212, the second downlink feeder cabinet 213 and the second uplink
The feeder cabinet of feeder cabinet 214, left neighbour's downlink interval includes the first downlink feeder cabinet 211 and the Zuo Lin substation of target substation
The feeder cabinet of the second downlink feeder cabinet 213 of (substation A), right neighbour's downlink interval includes the second downlink feeder line of target substation
First downlink feeder cabinet 211 of cabinet 213 and You Lin substation (substation C), the feeder cabinet of left neighbour's uplink interval include that target becomes
The first uplink feeder cabinet 212 in power station and the second uplink feeder cabinet 214 of Zuo Lin substation (substation A), right neighbour's uplink interval
Feeder cabinet include the second uplink feeder cabinet 214 of target substation and the first uplink feeder line of You Lin substation (substation C)
Cabinet 212.Using substation B as target substation, then know that four power supply sections are specific as follows: left neighbour's downlink interval: substation B
The first downlink feeder cabinet 211 and substation A the second downlink feeder cabinet 213), right adjacent downlink interval is (under the second of substation B
First downlink feeder cabinet 211 of row feeder cabinet 213 and substation C), left adjacent uplink interval (the first uplink feeder cabinet of substation B
212 with the second uplink feeder cabinet 214 of substation A), right adjacent uplink interval (the second uplink feeder cabinet 214 of substation B with become
The first uplink feeder cabinet 212 of power station C).After DC earthing trip protection, in a protection period T, by gradually starting confession
The method of electric section reclosing determines fault point.
To be equipped with a controller in the present embodiment shown in Fig. 4, for receiving, handling DC earthing protection signal, and root
According to processing result, make feeder cabinet tripping or the reclosing in corresponding power supply section.Wherein, input port I0.0 connects for receiving direct current
The DC earthing trip protection signal of ground protective device 64D.Output port Q0.0 is for exporting whole trip signals, output port
After Q0.0 exports whole trip signals, then controller is by the corresponding target substation of DC earthing trip protection signal and its adjacent
The tripping of substation.Output port Q0.1 is for exporting lower left line trip signal, by the first downlink feeder cabinet of target substation
211 trip with the second downlink feeder cabinet 213 of Zuo Lin substation (substation A)；Output port Q0.2 is used for lower left line reclosing
Signal starts the second downlink feeder cabinet of the first downlink feeder cabinet 211 and Zuo Lin substation (substation A) of target substation
213 reclosings.Output port Q0.3 is for exporting lower right line trip signal, by the second downlink feeder cabinet 213 of target substation
Tripping；Output port Q0.4 is used for lower right line reclosing signal, start target substation the second downlink feeder cabinet 213 and right neighbour
211 reclosing of the first downlink feeder cabinet of substation (substation C).Output port Q0.5 is used to export upper left line trip signal,
First uplink feeder cabinet 212 of target substation and the second uplink feeder cabinet 214 of Zuo Lin substation (substation A) are tripped；
Output port Q0.6 is used for upper left line reclosing signal, start target substation the first uplink feeder cabinet 212 and left adjacent power transformation
It stands 214 reclosing of the second uplink feeder cabinet of (substation A).Output port Q0.7 is for exporting upper right line trip signal, by mesh
Mark the second uplink feeder cabinet 214 of substation and the first uplink feeder cabinet 212 tripping of You Lin substation (substation C)；Output
Port Q1.0 is used for upper right line reclosing signal, and the second uplink feeder cabinet 214 and You Lin substation for starting target substation (become
Power station C) the first uplink feeder cabinet 212 trip reclosing.
As shown in figure 5, jumping when the input port I0.0 of controller receives DC earthing trip protection signal and executing step
It is rapid 2).In the present embodiment, the detailed step of step 2 includes:
2.1) the output port Q0.0 of controller exports whole trip signals, and DC earthing trip protection signal is corresponding
The tripping of target substation (substation B) and its adjacent substations (substation A and C)；
2.2) the output port Q0.2 of controller issues lower left line reclosing signal, starts target substation (substation B)
The first downlink feeder cabinet 211(figure in outline as target substation 211, it is identical to outline rule below) adjacent become with left
It is outlined in the second downlink feeder cabinet 213(figure in power station (substation A) as left neighboring station 213, outlines regular phase below
Reclosing together)；
2.3) the of the first downlink feeder cabinet 211 of target substation (substation B) and Zuo Lin substation (substation A)
After two downlink feeder cabinets, 213 reclosing, if the input port I0.0 of controller does not receive target substation in specified duration
The DC earthing trip protection signal of (substation B) then determines left adjacent downlink interval fault-free, and continues to jump execution step
2.4)；Otherwise determine that left adjacent downlink interval is faulty, the output port Q0.1 of controller issues lower left line trip signal, by target
First downlink feeder cabinet 211 of substation (substation B) and the second downlink feeder cabinet 213 of Zuo Lin substation (substation A) are jumped
Lock jumps and executes step 2.4)；
2.4) the output port Q0.4 of controller issues lower right line reclosing signal, starts target substation (substation B)
The second downlink feeder cabinet 213 and 211 reclosing of the first downlink feeder cabinet of You Lin substation (substation C)；
2.5) the of the second downlink feeder cabinet 213 of target substation (substation B) and You Lin substation (substation C)
After one downlink feeder cabinet, 211 reclosing, if the input port I0.0 of controller does not receive target substation in specified duration
The DC earthing trip protection signal of (substation B) then determines right adjacent downlink interval fault-free, and continues to jump execution step
2.6)；Otherwise determine that right adjacent downlink interval is faulty, the output port Q0.3 of controller issues lower right line trip signal, by target
Second downlink feeder cabinet 213 of substation (substation B) trips, and jumps and executes step 2.6)；
2.6) the output port Q0.6 of controller issues upper left line reclosing signal, starts target substation (substation B)
The first uplink feeder cabinet 212 and Zuo Lin substation (substation A) 214 reclosing of the second uplink feeder cabinet；
2.7) the of the first uplink feeder cabinet 212 of target substation (substation B) and Zuo Lin substation (substation A)
After two uplink feeder cabinets, 214 reclosing, if the input port I0.0 of controller does not receive target substation in specified duration
The DC earthing trip protection signal of (substation B) then determines left adjacent uplink interval fault-free, and continues to jump execution step
2.8)；Otherwise determine that left adjacent uplink interval is faulty, the output port Q0.5 of controller issues upper left line trip signal, by target
First uplink feeder cabinet 212 of substation (substation B) and the second uplink feeder cabinet 214 of Zuo Lin substation (substation A) are jumped
Lock jumps and executes step 2.8)；
2.8) the output port Q1.0 of controller issues upper right line reclosing signal, starts target substation (substation B)
The second uplink feeder cabinet 214 and You Lin substation (substation C) 212 reclosing of the first uplink feeder cabinet；
2.9) the of the second uplink feeder cabinet 214 of target substation (substation B) and You Lin substation (substation C)
After one uplink feeder cabinet, 212 reclosing, if the input port I0.0 of controller does not receive target substation in specified duration
The DC earthing trip protection signal of (substation B) then determines right adjacent uplink interval fault-free, jumps and execute step 2.10)；It is no
Then determine that right adjacent uplink interval is faulty, the output port Q0.7 of controller issues upper right line trip signal, by target substation
The second uplink feeder cabinet 214 of (substation B) and the first uplink feeder cabinet 212 tripping of You Lin substation (substation C), jump
Execute step 2.10)；
2.10) terminate and exit.
In the present embodiment, the length of specified duration above-mentioned can according to need between 1~200s to be adjusted in fact
Border value, and the step-length adjusted is 1s, the specific length of specified duration above-mentioned is 5s in the present embodiment.
Above-mentioned steps 2.1)~2.10) in carry out tripping and when reclosing, it is necessary to keep same power supply section while carrying out
Two feeder cabinets of tripping/reclosing carry out the synchronism of tripping and reclosing.For each powers section, if closed
Trip signal is no longer received after lock, then determines the section fault-free.If receiving trip signal again after closing a floodgate, determine
The section is broken down, and is tripped and is corresponded to feeder cabinet and be latched.It should be noted that above-mentioned steps 2.1)~2.10) be only with
The specific example that the definition of output port shown in Fig. 4 carries out, in implementation process, controller can also be according to other output ports
Definition carry out output signal each feeder cabinet of control tripping and reclosing, details are not described herein.
The above is only a preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
Those of ordinary skill for, several improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (3)
1. a kind of DC earthing guard method for single track reflux power supply system, it is characterised in that step includes:
1) by single track reflux each substation of power supply system power supply section according to up and down line and with adjacent substations
Syntople division in left and right is independent four power supply sections, and four power supplies section includes under left adjacent downlink interval, right neighbour
Row section, left adjacent uplink interval and right adjacent uplink interval, the single track reflux power supply system includes multiple substations, the power transformation
It stands including on the first downlink feeder cabinet (211), the first uplink feeder cabinet (212), the second downlink feeder cabinet (213) and second
The feeder cabinet of row feeder cabinet (214), the left adjacent downlink interval includes the first downlink feeder cabinet (211) and the left side of target substation
Second downlink feeder cabinet (213) of adjacent substation, the feeder cabinet of the right adjacent downlink interval include under the second of target substation
The feeder cabinet of the first downlink feeder cabinet (211) of row feeder cabinet (213) He Youlin substation, the left adjacent uplink interval includes mesh
Mark the second uplink feeder cabinet (214) of first uplink feeder cabinet (212) He Zuolin substation of substation, You Lin uplink area
Between feeder cabinet include target substation second uplink feeder cabinet (214) He Youlin substation the first uplink feeder cabinet
(212)；It is equipped with a DC earthing trip protection signal and control service area for receiving DC earthing protective device 64D
Between feeder cabinet tripping or reclosing controller；When the controller receives DC earthing trip protection signal, jumps and hold
Row step 2；
2) controller, which issues whole trip signals, makes four power supplies section all trip, while the controller is successively
Reclosing is carried out for each power supply section, and whether is still to receive DC earthing protective device 64D according to after reclosing
DC earthing trip protection signal determine whether the power supply section breaks down, if a certain power supply section is broken down,
Then the feeder cabinet in failure power supply section is tripped and is latched.
2. the DC earthing guard method according to claim 1 for single track reflux power supply system, which is characterized in that step
Rapid detailed step 2) includes:
2.1) by the tripping of the corresponding target substation of DC earthing trip protection signal and its adjacent substations；
2.2) controller issues lower left line reclosing signal, start the first downlink feeder cabinet (211) of target substation with
Second downlink feeder cabinet (213) reclosing of Zuo Lin substation；
2.3) in the first downlink feeder cabinet (211) of target substation and the second downlink feeder cabinet (213) of Zuo Lin substation weight
After combined floodgate, if controller does not receive the DC earthing trip protection signal of target substation in specified duration, a left side is determined
Adjacent downlink interval fault-free, and continue to jump and execute step 2.4)；Otherwise determine that left adjacent downlink interval is faulty, controller issues
Lower left line trip signal, by the second downlink feeder cabinet of the first downlink feeder cabinet (211) of target substation and Zuo Lin substation
(213) it trips, jumps and execute step 2.4)；
2.4) controller issues lower right line reclosing signal, start the second downlink feeder cabinet (213) of target substation with
First downlink feeder cabinet (211) reclosing of You Lin substation；
2.5) in the second downlink feeder cabinet (213) of target substation and the first downlink feeder cabinet (211) of You Lin substation weight
After combined floodgate, if controller does not receive the DC earthing trip protection signal of target substation in specified duration, the right side is determined
Adjacent downlink interval fault-free, and continue to jump and execute step 2.6)；Otherwise determine that right adjacent downlink interval is faulty, controller issues
Lower right line trip signal trips the second downlink feeder cabinet (213) of target substation, jumps and executes step 2.6)；
2.6) controller issues upper left line reclosing signal, start target substation the first uplink feeder cabinet (212) and
Second uplink feeder cabinet (214) reclosing of Zuo Lin substation；
2.7) in the second uplink feeder cabinet (214) weight of first uplink feeder cabinet (212) He Zuolin substation of target substation
After combined floodgate, if controller does not receive the DC earthing trip protection signal of target substation in specified duration, a left side is determined
Adjacent uplink interval fault-free, and continue to jump and execute step 2.8)；Otherwise determine that left adjacent uplink interval is faulty, controller issues
Upper left line trip signal, by the second uplink feeder cabinet of first uplink feeder cabinet (212) He Zuolin substation of target substation
(214) it trips, jumps and execute step 2.8)；
2.8) controller issues upper right line reclosing signal, start target substation the second uplink feeder cabinet (214) and
First uplink feeder cabinet (212) reclosing of You Lin substation；
2.9) in the first uplink feeder cabinet (212) weight of second uplink feeder cabinet (214) He Youlin substation of target substation
After combined floodgate, if controller does not receive the DC earthing trip protection signal of target substation in specified duration, the right side is determined
Adjacent uplink interval fault-free jumps and executes step 2.10)；Otherwise determine that right adjacent uplink interval is faulty, controller issues upper right
Row trip signal, by the first uplink feeder cabinet (212) of second uplink feeder cabinet (214) He Youlin substation of target substation
Tripping jumps and executes step 2.10)；
2.10) terminate and exit.
3. the DC earthing guard method according to claim 2 for single track reflux power supply system, which is characterized in that institute
The length for stating specified duration is 1~200s.
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| CN107046279B (en) * | 2017-04-28 | 2020-02-21 | 北京交通大学长三角研究院 | Grounding protection device and method for urban rail transit bidirectional traction substation |
| CN106992496B (en) * | 2017-05-26 | 2018-07-31 | 湘潭市恒创电气设备有限公司 | Earth leakage protecting method for Feeding System of Urban Rail Transit |
| CN106992503B (en) * | 2017-05-26 | 2018-03-13 | 湘潭市恒创电气设备有限公司 | The earth-leakage protection system of power supply system of train |
| CN111682511B (en) * | 2020-06-08 | 2022-06-21 | 北京全路通信信号研究设计院集团有限公司 | Unidirectional conduction device, direct current grounding protection device and method |
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| CN102390290A (en) * | 2011-09-19 | 2012-03-28 | 余家华 | Traction power supply system capable of realizing divided power supply of uplink power supply arm and downlink power supply arm in an asynchronous transmission (AT) way |
| CN105514926A (en) * | 2016-01-19 | 2016-04-20 | 中铁第四勘察设计院集团有限公司 | Method for recovering power supply after stripping started by direct-current ground protection |
| CN205565710U (en) * | 2016-04-08 | 2016-09-07 | 中铁第四勘察设计院集团有限公司 | Magnetic suspension engineering jumps device bilateral antithetical couplet |
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| CN101537802B (en) * | 2009-04-16 | 2011-03-09 | 余家华 | Traction power supply system of electrified railway novel AT power supply mode |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102390290A (en) * | 2011-09-19 | 2012-03-28 | 余家华 | Traction power supply system capable of realizing divided power supply of uplink power supply arm and downlink power supply arm in an asynchronous transmission (AT) way |
| CN105514926A (en) * | 2016-01-19 | 2016-04-20 | 中铁第四勘察设计院集团有限公司 | Method for recovering power supply after stripping started by direct-current ground protection |
| CN205565710U (en) * | 2016-04-08 | 2016-09-07 | 中铁第四勘察设计院集团有限公司 | Magnetic suspension engineering jumps device bilateral antithetical couplet |
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