CN109239537A - The Insulation Inspection System of train and train - Google Patents
The Insulation Inspection System of train and train Download PDFInfo
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- CN109239537A CN109239537A CN201710557921.1A CN201710557921A CN109239537A CN 109239537 A CN109239537 A CN 109239537A CN 201710557921 A CN201710557921 A CN 201710557921A CN 109239537 A CN109239537 A CN 109239537A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
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Abstract
The invention discloses a kind of train and the Insulation Inspection Systems of train, train is powered by power grid, and power grid includes power grid positive electrode bus and power grid negative electrode bus, and train includes multiple compartments, each compartment includes: compartment positive electrode bus, and compartment positive electrode bus is connected with power grid positive electrode bus；Compartment negative electrode bus, compartment negative electrode bus are connected with power grid negative electrode bus；Battery；Two-way isolation DC/DC module, battery are connected by two-way isolation DC/DC module with compartment positive electrode bus and compartment negative electrode bus；The first current sensor being connected between compartment positive electrode bus and compartment negative electrode bus；The load being connected with the first current sensor；The fault locator being connected between compartment positive electrode bus and compartment negative electrode bus, fault locator is for being respectively turned on compartment positive electrode bus and compartment negative electrode bus and the access of load to carry out negative insulation detection and positive Insulation monitoring to load, thus, such as specific load in position that insulation fault occurs can be accurately determined, the safety of train is improved.
Description
Technical field
The present invention relates to technical field of vehicle, in particular to the Insulation Inspection System of a kind of train and with the system
Train.
Background technique
With the development of the times, most train all uses electric energy as power, for example, train power supply device can be first by power grid
Power conversion be 860 volts or so of alternating current, be then by AC conversion again supply train after 600 volts of direct currents, or
Electricity supply train can be taken from 1500 volts or 750 volts of DC grids.It is run under the power supply of the most high-voltage electricity of train as a result, to ensure
The personal safety of equipment and passenger on train needs to carry out Insulation monitoring after train operation.
Current sensor is arranged to judge whether to insulate by the grounding point in train power supply device in the related technology
Failure.But in the related technology the problem is that, can not timely and accurately detect the insulation status of vehicle electrical-mechanical system,
It can not judge the position that insulation fault occurs, it is difficult to failure car separated.
Summary of the invention
The present invention is directed to solve one of the technical problem in above-mentioned technology at least to a certain extent.For this purpose, of the invention
One purpose is to propose a kind of Insulation Inspection System of train, can detect insulation fault in time, and accurately determine hair
The position of raw insulation fault.
Second object of the present invention is to propose a kind of train.
In order to achieve the above objectives, first aspect present invention embodiment proposes a kind of Insulation Inspection System of train, described
Train is powered by power grid, and the power grid includes power grid positive electrode bus and power grid negative electrode bus, and the train includes multiple compartments, often
A compartment includes: compartment positive electrode bus, and the compartment positive electrode bus is connected with the power grid positive electrode bus；Compartment negative electrode bus,
The compartment negative electrode bus is connected with the power grid negative electrode bus；Battery；Two-way isolation DC/DC module, the battery pass through institute
Two-way isolation DC/DC module is stated to be connected with the compartment positive electrode bus and the compartment negative electrode bus；It is connected to the compartment just
The first current sensor between pole bus and compartment negative electrode bus；The load being connected with first current sensor；Connection
Fault locator between the compartment positive electrode bus and the compartment negative electrode bus, the fault locator is for dividing
Do not connect the access of the compartment positive electrode bus and the compartment negative electrode bus and the load to carry out cathode to the load
Insulation monitoring and positive Insulation monitoring.
The Insulation Inspection System of the train proposed according to embodiments of the present invention, battery by two-way isolation DC/DC module with
Compartment positive electrode bus is connected with compartment negative electrode bus, and the first electric current biography is connected between compartment positive electrode bus and compartment negative electrode bus
Sensor, and load is connected with the first current sensor, and connecting fault is fixed between compartment positive electrode bus and compartment negative electrode bus
Position device, fault locator are respectively turned on compartment positive electrode bus and compartment negative electrode bus and the access of load to carry out to load
Negative insulation detection and positive Insulation monitoring.It as a result, can accurately really by the first current sensor and fault locator
Surely for example specific compartment in position that insulation fault occurs and specifically load, it is ensured that the personal safety of equipment and passenger on train,
Improve the reliability and safety of train power supply.
In order to achieve the above objectives, second aspect of the present invention embodiment proposes a kind of train, including the Insulation monitoring
System.
The train proposed according to embodiments of the present invention can accurately determine for example specific vehicle in position that insulation fault occurs
Compartment and specific load, improve the reliability and safety of train power supply.
Detailed description of the invention
Fig. 1 is the structural schematic diagram according to the Insulation Inspection System of the train of one embodiment of the invention；
Fig. 2 is the structural schematic diagram in each compartment in Insulation Inspection System according to the train of one embodiment of the invention；
Fig. 3 is the circuit theory according to fault locator in the Insulation Inspection System of the train of one embodiment of the invention
Figure, wherein negative insulation detection is carried out to load；
Fig. 4 is the circuit theory according to fault locator in the Insulation Inspection System of the train of one embodiment of the invention
Figure, wherein positive Insulation monitoring is carried out to load；
Fig. 5 is the structural representation in each compartment in Insulation Inspection System according to the train of another embodiment of the present invention
Figure；
Fig. 6 is the circuit according to compartment insulation detection device in the Insulation Inspection System of the train of one embodiment of the invention
Schematic diagram；
Fig. 7 is the electricity according to compartment insulation detection device in the Insulation Inspection System of the train of another embodiment of the present invention
Road schematic diagram；And
Fig. 8 is the structural schematic diagram according to the Insulation Inspection System of the train of another embodiment of the present invention.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
With reference to the accompanying drawing come describe the embodiment of the present invention train Insulation Inspection System and with the column of the system
Vehicle.It should be noted that in some embodiments of the invention, train is using vehicle shell as ground connection reference point, in other words, train
It is connected between ground wire and the earth without conductor, it is using suspension " ground " i.e. vehicle shell as ground connection reference point, for example, train uses rubber
Rubber tire tire, vehicle shell and the earth insulate, and entire train uses floating neutral system as a result,.
According to the embodiment of Fig. 1-2, train can be powered by power grid, and power grid includes that power grid positive electrode bus L1 and power grid cathode are female
Line L2, train may include multiple compartments 10.According to one embodiment of present invention, Insulation Inspection System can be to train and train
Each compartment 10 it is equal carry out Insulation monitoring to judge whether to occur insulation fault, and after insulation fault occurs for judgement, lead to
The fault locator for crossing each compartment 10 positions insulation fault, so as to detect insulation fault in time, and it is quasi-
Really determine for example specific compartment in position that insulation fault occurs and specific load, it is ensured that the person of equipment and passenger on train
Safety, improves the reliability and safety of train power supply.
Specifically, according to the embodiment of Fig. 1-2, each compartment 10 of train is attached to the power grid positive electrode bus of power grid
L1 and power grid negative electrode bus L2, so that each compartment 10 that net is entire train powers.Each compartment 10 can include: compartment anode
Bus M1, compartment negative electrode bus M2, the first current sensor 110, load 120, fault locator 130, battery 140 and two-way
DC/DC module 150 is isolated.
As shown in Figs. 1-2, positive electrode bus M1 in compartment is connected with power grid positive electrode bus L1；Compartment negative electrode bus L2 and power grid are negative
Pole bus L2 is connected.Specifically, according to one embodiment of present invention, as shown in Fig. 2, compartment positive electrode bus M1 can pass through the 6th
Switch K6 is connected with power grid positive electrode bus L1, and compartment negative electrode bus L2 can pass through the 7th switch K7 and power grid negative electrode bus L2 phase
Even, wherein when the 6th switch K6 and the 7th switch K7 are both turned on, the electrical energy transportation of power grid is negative to compartment positive electrode bus M1 and compartment
Pole bus M2, so that power grid is the power supply of compartment 10；When the 6th switch K6 and the 7th switch K7 are turned off, the electric energy of power grid stops
It is delivered to compartment positive electrode bus M1 and compartment negative electrode bus M2, so that power grid stops being that compartment 10 powers.
As shown in Fig. 2, battery passes through two-way isolation DC/DC module 140 and compartment positive electrode bus M1 and compartment negative electrode bus
M2 is connected.Specifically, two-way isolation DC/DC module 150 can be by between compartment positive electrode bus M1 and compartment negative electrode bus M2
One direct current is converted to the second direct current so that the second direct current is supplied battery 140, also, two-way isolation DC/DC module 150 can
Second direct current of battery 140 is converted into the first direct current to bear the first direct current supply compartment positive electrode bus M1 and compartment
Pole bus M2.
As shown in Figs. 1-2, the first current sensor 110 be connected to compartment positive electrode bus M1 and compartment negative electrode bus M2 it
Between；Load 120 is connected with the first current sensor 110.Specifically, as shown in Fig. 2, the anode and cathode of load 120 can be distinguished
It is connected with compartment positive electrode bus M1 and compartment negative electrode bus M2, so that power grid passes through compartment positive electrode bus M1 and compartment negative electrode bus
M2 powers to the load 120 in each compartment 10, and the first current sensor 110 may be provided at the anode of load 120 and cathode is set
The entrance in load 120 is set, the first current sensor 110 can measure the difference between the positive electrode current and cathodal current of load 120
Value.
It should be noted that load 120 is not limited to one in each compartment 10, can also be it is multiple, correspondingly, each compartment
First current sensor 110 is also not necessarily limited to one in 10, can be multiple.When the first current sensor 110 and load 120 are multiple
When, each first current sensor 110 is both connected between compartment positive electrode bus M1 and compartment negative electrode bus M2, each load
120 are connected with corresponding first current sensor 110.That is, multiple loads 120 can be connected in parallel in compartment anode mother
Line M1 and compartment negative electrode bus M2, each first current sensor 110 may be disposed at the entrance of corresponding load 120 to detect phase
Difference between the positive electrode current and cathodal current of the load 120 answered.It should be noted that in embodiments of the present invention, for
The connection type, working principle of each load 120 is essentially identical in compartment 10,120 loaded in the following embodiments
Connection type, working principle etc. are suitable for each load in compartment 10.
As shown in Figs. 1-2, fault locator 130 is connected between compartment positive electrode bus M1 and compartment negative electrode bus M2,
Fault locator 130 is used to be respectively turned on the access of compartment positive electrode bus M1 and compartment negative electrode bus M2 and load 120 with right
Load 120 carries out negative insulation detection and positive Insulation monitoring.
Specifically, fault locator 130 can connect positive electrode bus M1 in compartment according to the first predetermined manner and compartment is negative
Pole bus M2 and the access of load 120 can connect vehicle according to the second predetermined manner to carry out negative insulation detection to load 120
Compartment positive electrode bus M1 and compartment negative electrode bus M2 and the access of load 120 are to carry out positive Insulation monitoring to load 120.More specifically
Ground can lead to when connecting the access of compartment positive electrode bus M1 and compartment negative electrode bus M2 and load 120 according to the first predetermined manner
The difference between the positive electrode current and cathodal current of the first current sensor 110 measurement load 120 is crossed, and is loading 120 just
When difference between electrode current and cathodal current is greater than predetermined current threshold, judges the cathode electric leakage of load 120, it is exhausted that cathode occurs
Reason barrier.Similarly, when connecting the logical of compartment positive electrode bus M1 and compartment negative electrode bus M2 and load 120 according to the second predetermined manner
Lu Shi can measure the difference between the positive electrode current and cathodal current of load 120 by the first current sensor 110, and negative
When carrying the difference between 120 positive electrode current and cathodal current greater than predetermined current threshold, the anode electric leakage of load 120 is judged,
Positive insulation fault occurs.
Fault location can be carried out by the current value and fault locator that the first current sensor 110 detects as a result, it is quasi-
Really determine the specific compartment that insulation fault occurs and specific load, it is easy to repair convenient for by failure car separated, and can be true
The equipment on train and the personal safety of passenger are protected, the reliability and safety of train power supply are improved.
The structure and principle of fault locator 130 are described in detail below with reference to the embodiment of Fig. 3 and Fig. 4.
According to one embodiment of present invention, as shown in Figure 3 and Figure 4, fault locator 130 specifically includes: the first electricity
Hinder R1, first switch K1, second resistance R2, second switch K2 and controller 131.
Wherein, first resistor R1 is connected with compartment positive electrode bus M1；First switch K1 is connected with vehicle shell；Second resistance R2
It is connected with compartment negative electrode bus M2；Second switch K2 is connected with vehicle shell.Also, first resistor R1 can connect with first switch K1
Connection, second resistance R2 can be connected in series with second switch K2.That is, one end of first resistor R1 and compartment positive electrode bus
M1 is connected, and one end of first switch K1 is connected with the other end of first resistor R1, the other end of first switch K1 with vehicle shell phase
Even；One end of second resistance R2 is connected with compartment positive electrode bus M1, one end of second switch K2 and the other end of second resistance R2
It is connected, the other end of second switch K2 is connected with vehicle shell.It should be noted that vehicle shell be train vehicle shell, by train
Vehicle shell be used as refer to grounding point.
Controller 131 is for controlling first switch K1 and second switch K2.Specifically, it does not insulate in train
When detection, controller 131 controls first switch K1 and second switch K2 and disconnects；When train carries out Insulation monitoring, controller
131 control first switch K1 closures, and control second switch K2 disconnection, the current value detected by the first current sensor 110
Negative insulation detection, and control second switch K2 closure are carried out to load 120, and control first switch K1 disconnection, by the
The current value of one current sensor 110 detection carries out positive Insulation monitoring to load 120.
Specifically, as shown in figure 3, the first equivalent resistance R31 can be equivalent insulation of the cathode of load 120 to vehicle shell ground
Resistance, as shown in figure 4, the second equivalent resistance R32 can be the positive equivalent insulation resistance to vehicle shell ground of load 120, when first
When the resistance value of equivalent resistance R31 or the second equivalent resistance R32 are less than predetermined resistance value, Insulation Inspection System can determine whether insulation event
Barrier occurs.
By default, i.e., when insulation fault does not occur, fault locator 130 does not carry out Insulation monitoring, controller
131 control first switch K1 and second switch K2 are disconnected.When insulation fault occurs, Insulation Inspection System produces failure report
Alert signal simultaneously notifies fault locator 130, and fault locator 130 carries out fault location after receiving warning message, controls
Device 131 processed can first control first switch K1 closure and second switch K2 is disconnected, the electric current detected by the first current sensor 110
Value carries out negative insulation detection to load 120, then controls second switch K2 closure and first switch K1 disconnection, passes through the first electric current
The current value that sensor 110 detects carries out positive Insulation monitoring to load 120.Certainly, positive Insulation monitoring can also be first carried out, then
Carry out negative insulation detection.
More specifically, as shown in figure 3, when first switch K1 closure and second switch K2 disconnect when, compartment positive electrode bus M1,
First resistor R1, first switch K1, vehicle shell, the first equivalent resistance R31, load 120 and compartment negative electrode bus M2 constitute circuit,
Electric current can be generated by the direction of arrow in Fig. 3 as a result, and flow through 120 corresponding first current sensors 110 of load, when the first electric current
When the current value that sensor 110 detects is greater than predetermined current threshold, the cathode electric leakage of the judgement of controller 131 load 120 loads
120 occur negative insulation failure.
Similarly, as shown in figure 4, when being closed second switch K2 and first switch K1 is disconnected, compartment positive electrode bus M1, load
120, the second equivalent resistance R32, vehicle shell, second switch K2, second resistance R2 and compartment negative electrode bus M2 constitute circuit, by
This, can generate electric current by the direction of arrow in Fig. 4 and flow through 120 corresponding first current sensors 110 of load, when the first electric current passes
When the current value that sensor 110 detects is greater than predetermined current threshold, the anode electric leakage of the judgement of controller 131 load 120 loads
120 occur negative insulation failure.
The current value that can be detected as a result, by the first current sensor 110 determines the specific load that insulation fault occurs, just
In maintenance, the reliability and safety of train power supply are improved.
Further, according to one embodiment of present invention, as shown in figure 5, compartment 10 further include: the second current sensor
160.Wherein, the second current sensor 160 is attached to compartment positive electrode bus M1, compartment negative electrode bus M 2 and two-way isolation DC/
Between DC module 150, wherein controller 131 passes through in control first switch K1 closure, and when control second switch K2 disconnection
The current value of second current sensor 160 detection carries out negative insulation detection to battery 140, and closes in control second switch K2
When closing, and controlling first switch K1 disconnection, anode is carried out to battery 140 by the current value that the second current sensor 160 detects
Insulation monitoring.
That is, each compartment 10 may include grid side and battery side, it is two-way isolation between grid side and battery side
DC/DC module 150, grid side are equipped with fault locator 130 and load 120, the first electricity of entrance installation of each load 120
Flow sensor 110.Also, since battery side does not have branch, there is no need to be all in the separately installed fault locator of battery side
Grid side installs fault locator.
As a result, in an embodiment of the present invention, in compartment positive electrode bus M1, compartment negative electrode bus M2 and two-way isolation DC/
The second current sensor 160 is connected between DC module 150.That is, can be installed before two-way isolation DC/DC module 150
Second current sensor 160, fault locator 130 carry out fault location to battery 140 by the second current sensor 160,
Negative insulation detection is carried out to battery 140 and positive Insulation monitoring is carried out to battery 140.
It should be understood that carrying out negative insulation inspection to battery 140 by the current value that the second current sensor 160 detects
Survey and positive Insulation monitoring and Fig. 3 and Fig. 4 embodiment in the current value that is detected by the first current sensor 110 to loading 120
The principle for carrying out negative insulation detection and positive Insulation monitoring is essentially identical, is no longer described in detail.
Fault locator can determine whether battery 140 is sent out by the current value that the second current sensor 160 detects as a result,
Raw insulation fault, it is easy to repair, improve the reliability and safety of train power supply.
The Insulation monitoring mode of Insulation Inspection System is described in detail in 5-7 with reference to the accompanying drawing.
According to one embodiment of present invention, as shown in figure 5, compartment 10 further include: the first compartment insulation detection device
170, the first compartment insulation detection device 170 is connected between compartment positive electrode bus M1 and compartment negative electrode bus M2, the first compartment
Insulation detection device 170 is used to detect the insulation situation between compartment positive electrode bus M1 and compartment negative electrode bus M2.That is,
First compartment insulation detection device 170 is used to carry out Insulation monitoring to compartment positive electrode bus M1 and compartment negative electrode bus M2.Change speech
It, the first train insulation detection device 170 is used to detect the insulation situation of the grid side in compartment 10.
Specifically, according to the embodiment of Fig. 6, the first compartment insulation detection device 170 can include: 3rd resistor R3, third
Switch K3, the 4th resistance R4, the 4th switch K4, first voltage detector 171, second voltage detector 172 and tertiary voltage inspection
Survey device 173.
Wherein, 3rd resistor R3 and third switch K3 are serially connected, the 3rd resistor R3 and third switch K3 being serially connected
It is connected between compartment positive electrode bus M1 and vehicle shell ground；4th resistance R4 and the 4th switch K4 are serially connected, be serially connected
Four resistance R4 and the 4th switch K4 are connected between compartment negative electrode bus M2 and vehicle shell ground；First voltage detector 171 is connected in parallel on
The both ends of 3rd resistor R3, first voltage detector 171 are used to detect the voltage of 3rd resistor R3 to generate first voltage V1；The
Two voltage detectors 172 are connected in parallel on the both ends of the 4th resistance R4, and second voltage detector 172 is used to detect the electricity of the 4th resistance R4
Pressure is to generate second voltage V2；Tertiary voltage detector 173 for detect compartment positive electrode bus M1 and compartment negative electrode bus M2 it
Between voltage to generate tertiary voltage V3.
It further, according to one embodiment of present invention, can be according to the resistance value of 3rd resistor R3, the 4th resistance R4
Resistance value, first voltage V1, second voltage V2 and tertiary voltage V3 generate the insulation resistance of compartment positive electrode bus M1 and compartment is born
The insulation resistance of pole bus M2.
Specifically, as shown in Figure 6, it is assumed that compartment positive electrode bus M1 is R33, compartment cathode to the insulation resistance on vehicle shell ground
Bus M2 is R34 to the insulation resistance on vehicle shell ground.In the embodiment in fig 6, the first compartment insulation detection device 170 passes through electric bridge
Method carries out Insulation monitoring, wherein 3rd resistor R3 and the 4th resistance R4 is arm resistance, and third switch K3 and the 4th switch K4 are
Bridge arm switch.When carrying out Insulation monitoring, the first compartment insulation detection device 170 can control third switch K3 to be closed and control
Four switch K4 shutdown detects the voltage of 3rd resistor R3 by first voltage detector 171 to generate first voltage V1, and control
It makes the 4th switch K4 and is closed and controls third switch K3 shutdown, the electricity of the 4th switch K4 is detected by second voltage detector 172
Pressure detects compartment positive electrode bus M1 and compartment negative electrode bus to generate second voltage V2, and by tertiary voltage detector 173
Voltage between M2 is to generate tertiary voltage V3.
It will be appreciated from fig. 6 that first voltage V1 meets following formula:Second voltage V2 meets following
Formula:Wherein, R3 is the resistance value of 3rd resistor R3, and R4 is the resistance value of the 4th resistance R4.It is false
If the resistance value of 3rd resistor R3 and the resistance value of the 4th resistance R4 are equal to R, i.e. R3=R4=R, formula is brought intoWithIt can be calculated,
It, can be according to formula as a result, after obtaining first voltage V1, second voltage V2 and tertiary voltage V3The insulation resistance of compartment positive electrode bus M1 is calculated, and can be according to formulaMeter
Calculate the insulation resistance of compartment negative electrode bus M2.
In turn, a specific embodiment according to the present invention, when the insulation resistance of compartment negative electrode bus M2 is less than default electricity
When the insulation resistance of resistance value and/or compartment positive electrode bus M1 are less than predetermined resistance value, the judgement of the first compartment insulation detection device 170
Insulation fault occurs for corresponding compartment 10.
Specifically, according to the embodiment of Fig. 7, the first compartment insulation detection device 170 can include: signal source A1, the 5th electricity
Hinder R5, the 5th switch K5, the 6th resistance R6 and the 4th voltage detector 174.
Wherein, the 5th resistance R5 and the 5th switch K5 are serially connected, the 5th resistance R5 being serially connected and the 5th switch K5
It is connected between the first end of signal source A1 and compartment positive electrode bus M1 or the first end of signal source A1 and compartment negative electrode bus M2
Between；6th resistance R6 is connected between the second end of signal source A1 and vehicle shell ground；4th voltage detector 174 is for detecting the
The voltage of six resistance R6；Wherein, when signal source A1 exports the first output voltage Vo1, the voltage of the 6th resistance R6 is the 4th voltage
When V4, signal source A2 export the second output voltage Vo2, the voltage of the 6th resistance R6 is the 5th voltage V5.
Further, can according to the resistance value of the 5th resistance R5, the resistance value of the 6th resistance R6, the first output voltage Vo1,
Second output voltage Vo2, the 4th voltage V4 and the 5th voltage V5 generate the insulation resistance or compartment anode of compartment negative electrode bus M2
The insulation resistance of bus M1.Wherein, when the 5th resistance R5 and the 5th switch the K5 first end for being connected to signal source A1 and compartment just
When between the bus M1 of pole, the insulation resistance of compartment negative electrode bus M2 is produced；When the 5th resistance R5 and the 5th switch K5 are connected to
When between the first end and compartment negative electrode bus M2 of signal source A1, the insulation resistance of compartment positive electrode bus M1 is produced.In other words,
The first compartment insulation detection device 170 of 7 embodiment of connection figure between compartment positive electrode bus M1 and vehicle shell ground produces compartment
The insulation resistance of negative electrode bus M2, and the first compartment insulation of 7 embodiment of connection figure is examined between negative electrode bus M and vehicle shell ground
Device 170 is surveyed, the insulation resistance of 2 compartment positive electrode bus M1 of compartment is produced.
Specifically, the first end and compartment negative electrode bus of signal source A1 are connected to the 5th resistance R5 and the 5th switch K5
It is illustrated between M2, since the 5th resistance R5 and the 5th switch K5 is connected to the first end and compartment anode of signal source A1
Principle between bus M1 is essentially identical with the present embodiment, is no longer described in detail here.
As shown in Figure 7, it is assumed that compartment positive electrode bus M1 is R35 to the insulation resistance on vehicle shell ground.In the example of figure 7,
First compartment insulation detection device 170 carries out Insulation monitoring by signal injection method, and the 5th resistance R5 is coupling resistance, the 6th electricity
Resistance R6 is current sampling resistor, V6 is voltage between compartment positive electrode bus M1 and compartment negative electrode bus M2, the letter of signal source A1
Number amplitude is variable.
When carrying out Insulation monitoring, the first compartment insulation detection device 170 can first control the 5th switch K5 closure, then control
Signal source A1 processed detects the electricity of the 6th resistance R6 by the 4th voltage detector 174 according to the first output voltage Vo1 Injection Signal
Pressure is to obtain the 4th voltage V4, at this point, the 4th voltage V4 satisfiable formulaAnd control signal
Source A1 detects the voltage of the 6th resistance R6 according to the second output voltage Vo2 Injection Signal, by the 4th voltage detector 174 to obtain
The 5th voltage V5 is obtained, at this point, the 5th voltage V5 satisfiable formula
Combinatorial formulaWithIt can obtain,
Pass through formula as a result,The exhausted of compartment positive electrode bus M1 can be calculated separately out
The insulation resistance of edge resistance and compartment negative electrode bus M2,
In turn, a specific embodiment according to the present invention, when the insulation resistance of compartment negative electrode bus M2 is less than default electricity
When the insulation resistance of resistance value and/or compartment positive electrode bus M1 are less than predetermined resistance value, the judgement of the first compartment insulation detection device 170
Insulation fault occurs for corresponding compartment 10.
Further, according to one embodiment of present invention, as shown in figure 5, compartment 10 further include: the insulation inspection of the second compartment
Device 180 is surveyed, the second compartment insulation detection device 180 is connected to 140 both ends of battery.Specifically, two-way isolation DC/DC module
150 have the first battery-end and the second battery-end, and the first battery-end of two-way isolation DC/DC module 150 passes through anode mother
Line P1 is connected with the anode of battery 140, the second battery-end of two-way isolation DC/DC module 150 by battery cathode bus P2 with
The cathode of battery 140 is connected, and the second compartment insulation detection device 180 is attached to anode bus P1 and battery cathode bus
Between P2.Second compartment insulation detection device 180 is for detecting anode bus P1 and battery cathode bus P2 to vehicle shell
Insulate situation.That is, the second compartment insulation detection device 180 is used for anode bus P1 and battery cathode bus P2
Carry out Insulation monitoring.In other words, the second compartment insulation detection device 180 is used to carry out the insulation situation of the battery side in compartment 10
Detection.
It should be understood that the structure of the embodiment of Fig. 6 or Fig. 7, Fig. 6 can be used in the second compartment insulation detection device 180
Or the embodiment of Fig. 7 be used for the second compartment insulation detection device 180 the difference is that, compartment positive electrode bus M1 is replaced with
Compartment negative electrode bus M2 is replaced with battery cathode bus P2, can obtain anode bus as a result, by anode bus P1
The insulation resistance of P1 and the insulation resistance of battery cathode bus P2.
It can be detected in time by the first compartment insulation detection device and the second compartment insulation detection device as a result, each
Whether compartment occurs insulation fault, it is ensured that the personal safety of equipment and passenger on train improves the reliability of train power supply
And safety.
Further, according to one embodiment of present invention, as shown in figure 8, the Insulation Inspection System of train further include: column
Vehicle insulation detection device 20, train insulation detection device 20 are connected between power grid positive electrode bus L1 and power grid negative electrode bus L2.
Train insulation detection device 20 is used to detect the insulation situation between power grid positive electrode bus L1 and power grid negative electrode bus L2, that is,
It says, train insulation detection device 20 is used to carry out Insulation monitoring to power grid positive electrode bus L1 and power grid negative electrode bus L2.In other words,
Train insulation detection device 20 is for detecting the insulation situation of entire train.
It should be understood that the structure of the embodiment of Fig. 6 or Fig. 7, Fig. 6 or Fig. 7 can be used in train insulation detection device 20
Embodiment be used for train insulation detection device 20 the difference is that, it is female that compartment positive electrode bus M1 is replaced with into power grid anode
Compartment negative electrode bus M2 is replaced with power grid negative electrode bus L2, can obtain the insulated electro of power grid positive electrode bus L1 as a result, by line L1
The insulation resistance of resistance and power grid negative electrode bus L2.
Further, according to one embodiment of present invention, as shown in figure 8, the Insulation Inspection System of train further includes column
Vehicle controller 30, train control 30 are used for when train insulation detection device 20 detects insulation fault, successively start compartment
Fault locator 130 in 10, and insulation fault is positioned by the fault locator 130 in compartment.
Wherein, according to one embodiment of present invention, train insulation detection device 20, the first compartment insulation detection device
170, the second compartment insulation detection device 180 and train control 30 can access the communication network of train, train Insulation monitoring
Device 20, the first compartment insulation detection device 170, the second compartment insulation detection device 180 and train control 30 are mutual
It can be communicated by communication network.Alternatively, according to another embodiment of the invention, train insulation detection device 20 and each
First compartment insulation detection device 170, the second compartment insulation detection device 180 in compartment 10 are communicated, to obtain each vehicle
The insulation situation in compartment 10, and only train insulation detection device 20 and train control 30 access the communication network of train, thus the
The information that one compartment insulation detection device 170, the second compartment insulation detection device 180 generate can be by train insulation detection device 20
It is transmitted again after judgement.
Specifically, train insulation detection device 20 can its own detect entire train occur insulation fault or any one
The first compartment insulation detection device 170 or the second compartment insulation detection device 180 in compartment 10 detect that corresponding compartment 10 is sent out
Warning message is generated when raw insulation fault, warning message can be sent to train by communication network by train insulation detection device 20
Controller 30, train control 30 successively start the fault locator 130 in compartment 10 after receiving warning message,
And insulation fault is positioned by the fault locator 130 in compartment.
It should be understood that the compartment positive electrode bus M1 due to multiple compartments 10 connects together, the vehicle in multiple compartments 10
Compartment negative electrode bus M2 connects together, and also all connects together to the vehicle shell in multiple compartments 10, first opens in fault locator 130
The switching for closing K1 and second switch K2 can influence each other, and therefore, when carrying out fault location, train control 30 can successively start
Fault locator 130 in compartment 10, to ensure that it is dynamic that only one fault locator 130 of same time carries out switching
Make.
Specifically, train control 30 can successively start the fault locator 130 in compartment 10, i.e. control failure is fixed
First switch K1 and second switch the K2 closure of position device 130, after the fault locator 130 in any compartment starts, therefore
Barrier positioning device 130 can monitor first current sensor 110 in the compartment and/or the electric current of the second current sensor 160 detection
Value, if what the current value of the first current sensor 110 detection was detected greater than predetermined current threshold or the second current sensor 160
Current value is greater than predetermined current threshold, which then generates fault location information, and fault location information is sent out
Train control 30 is given, to can determine the specific location that insulation fault occurs.In addition, in other embodiments, any
After the fault locator 130 in compartment starts, compartment where the fault locator 130 in other compartments can also monitor respectively
First current sensor 110 and/or the current value of the second current sensor 160 detection, to determine it according to the current value of detection
The specific location of insulation fault occurs for his compartment.
In addition, according to one embodiment of present invention, train control 30 can also be used in when train insulation detection device 20
When detecting insulation fault, starts the fault locator 130 in any compartment 10 and close the failure in other compartments 10 and determine
Position device 130, and insulation fault is positioned by the fault locator 130 in compartment.
That is, train control 30 can control the event in any compartment in multiple compartments 10 when carrying out fault location
Hinder positioning device 130 to start, so that only one fault locator of same time carries out switching movement, in any compartment
Fault locator 130 start, the fault locator 130 in each compartment 10 it is detectable respectively where the first electric current in compartment
Sensor 110 and/or the current value of the second current sensor 160 detection, and in the current value of the first current sensor 110 detection
The current value detected greater than predetermined current threshold or the second current sensor 160 is greater than predetermined current threshold, generates fault location
Information, so that it is determined that the specific location of insulation fault occurs.
The Insulation Inspection System of train passes through fault locator 130, the first compartment insulation detection device 170, the as a result,
Cooperation between two compartment insulation detection devices 180 and train insulation detection device 20 can position insulation fault, and
And interference caused by can avoid multiple compartments while carrying out fault location, promote the accuracy of fault location.
Finally, the embodiment of the present invention also proposed a kind of train, the Insulation Inspection System including above-described embodiment.
According to one embodiment of present invention, train can be straddle-type monorail train.
The train proposed according to embodiments of the present invention can accurately determine for example specific vehicle in position that insulation fault occurs
Compartment and specific load, improve the reliability and safety of train power supply.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on the figure or
Positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must
There must be specific orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.In the description of the present invention, the meaning of " plurality " is two or more,
Unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements.It for the ordinary skill in the art, can be according to specific feelings
Condition understands the concrete meaning of above-mentioned term in the present invention.
In the present invention unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with
It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below "
One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (9)
1. a kind of Insulation Inspection System of train, which is characterized in that the train is powered by power grid, and power grid includes that power grid anode is female
Line and power grid negative electrode bus, the train include multiple compartments, and each compartment includes:
Compartment positive electrode bus, the compartment positive electrode bus are connected with the power grid positive electrode bus；
Compartment negative electrode bus, the compartment negative electrode bus are connected with the power grid negative electrode bus；
Battery；
Two-way isolation DC/DC module, the battery pass through the two-way isolation DC/DC module and the compartment positive electrode bus and institute
Compartment negative electrode bus is stated to be connected；
The first current sensor being connected between the compartment positive electrode bus and compartment negative electrode bus；
The load being connected with first current sensor；
The fault locator being connected between the compartment positive electrode bus and the compartment negative electrode bus, the fault location dress
The access for being respectively turned on the compartment positive electrode bus and the compartment negative electrode bus and the load is set to the load
Carry out negative insulation detection and positive Insulation monitoring.
2. the Insulation Inspection System of train as described in claim 1, which is characterized in that the fault locator is specifically wrapped
It includes:
First resistor, the first resistor are connected with the compartment positive electrode bus；
First switch, the first switch are connected with vehicle shell；
Second resistance, the second resistance are connected with the compartment negative electrode bus；
Second switch, the second switch are connected with the vehicle shell；
Controller, for controlling the first switch and the second switch.
3. the Insulation Inspection System of train as described in claim 1, which is characterized in that do not carry out Insulation monitoring in the train
When, the controller controls the first switch and the second switch disconnects；When the train carries out Insulation monitoring, institute
It states controller and controls the first switch closure, and control the second switch and disconnect, examined by first current sensor
The current value of survey carries out negative insulation detection, and the control second switch closure to the load, and controls described first
Switch disconnects, and the current value detected by first current sensor carries out positive Insulation monitoring to the load.
4. the Insulation Inspection System of train as described in claim 1, which is characterized in that the compartment further include:
The first compartment insulation detection device being connected between the compartment positive electrode bus and the compartment negative electrode bus, for examining
Survey the insulation situation between the compartment positive electrode bus and the compartment negative electrode bus.
5. the Insulation Inspection System of train as described in claim 1, which is characterized in that the compartment further include:
Second be connected between the compartment positive electrode bus, the compartment negative electrode bus and the two-way isolation DC/DC module
Current sensor, wherein the controller leads to when controlling the first switch closure, and controlling second switch disconnection
The current value for crossing the second current sensor detection carries out negative insulation detection to the battery, and in control described second
When closing the switch, and controlling first switch disconnection, the current value detected by second current sensor is to the electricity
Pond carries out positive Insulation monitoring.
6. the Insulation Inspection System of train as described in claim 1, which is characterized in that the compartment further include:
It is connected to the second compartment insulation detection device at the battery both ends.
7. the Insulation Inspection System of train as described in claim 1, which is characterized in that further include:
Train insulation detection device, the train insulation detection device are connected to the power grid positive electrode bus and the power grid cathode
Between bus.
8. the Insulation Inspection System of train as claimed in claim 7, which is characterized in that further include:
Train control, for successively starting in the compartment when the train insulation detection device detects insulation fault
Fault locator, and insulation fault is positioned by the fault locator in compartment.
9. a kind of train, which is characterized in that including such as described in any item Insulation Inspection Systems of claim 1-8.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710557921.1A CN109239537B (en) | 2017-07-10 | 2017-07-10 | Train and insulation detection system of train |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710557921.1A CN109239537B (en) | 2017-07-10 | 2017-07-10 | Train and insulation detection system of train |
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| CN109239537A true CN109239537A (en) | 2019-01-18 |
| CN109239537B CN109239537B (en) | 2022-08-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4307506A1 (en) * | 2022-06-23 | 2024-01-17 | Siemens Mobility GmbH | Method and arrangement for testing an electric dc voltage network and finding a ground fault |
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