CN109283445A - A kind of insulation detecting method and controller of energy storage type rail vehicle charging system - Google Patents
A kind of insulation detecting method and controller of energy storage type rail vehicle charging system Download PDFInfo
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- CN109283445A CN109283445A CN201811242953.3A CN201811242953A CN109283445A CN 109283445 A CN109283445 A CN 109283445A CN 201811242953 A CN201811242953 A CN 201811242953A CN 109283445 A CN109283445 A CN 109283445A
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- 238000009413 insulation Methods 0.000 title claims abstract description 99
- 238000004146 energy storage Methods 0.000 title claims abstract description 76
- 238000000034 method Methods 0.000 title claims abstract description 50
- 238000009825 accumulation Methods 0.000 claims abstract description 60
- 230000000630 rising effect Effects 0.000 claims abstract description 33
- 230000002159 abnormal effect Effects 0.000 claims abstract description 22
- 238000012544 monitoring process Methods 0.000 claims abstract description 10
- 238000011897 real-time detection Methods 0.000 claims abstract description 10
- 230000005611 electricity Effects 0.000 claims description 22
- 239000003990 capacitor Substances 0.000 claims description 10
- 238000001514 detection method Methods 0.000 abstract description 13
- 238000010586 diagram Methods 0.000 description 7
- 230000032683 aging Effects 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
- 238000013024 troubleshooting Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/14—Circuits therefor, e.g. for generating test voltages, sensing circuits
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- H02J7/0021—
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2200/00—Type of vehicles
- B60L2200/26—Rail vehicles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/12—Electric charging stations
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention discloses the insulation detecting methods and controller of a kind of energy storage type rail vehicle charging system, comprising: obtains in advance in the case where charging system charges normal, voltage of the voltage of vehicles energy accumulating both ends of power within the preset charged time rises desired value；During charging system is Vehicular charging, by the voltage at the output voltage sensor real-time detection accumulation power supply both ends of charging system, and periodically seeks its voltage within the preset charged time and rise actual value；When voltage rises the voltage value differed between desired value and voltage rising actual value no more than predetermined voltage threshold, determine that charging system is in normal insulation state；When the voltage value of the two difference is greater than predetermined voltage threshold, determine that charging system is in abnormal state of insulation.As it can be seen that present application addresses the Insulation monitoring problems under vehicle and its charging system cathode Grounding, to ensure that the charging security of vehicle；And it is not necessarily to additional detection circuit, to save testing cost.
Description
Technical field
The present invention relates to technical field of insulation detection, more particularly to a kind of insulation of energy storage type rail vehicle charging system
Detection method and controller.
Background technique
Currently, the charging system of energy storage type rail vehicle, as high-power charging equipment, the insulating properties of positive and negative interpolar is wanted
Ask higher.And once there is component, cable aging under complicated application environment in energy storage type rail vehicle, all may cause insulation
Performance decline, to reduce the charging security of energy storage type rail vehicle；It possibly even will lead to electric leakage or short circuit if serious
The generation of phenomenon, thus because of catching fire caused by heat accumulation effect.Therefore, the charging safety to guarantee energy storage type rail vehicle
Property, it is necessary to increase the detection to the state of insulation of its charging system.In the prior art, the charging equipment of other class vehicles is mostly adopted
State of insulation is measured with the resistance value of detection insulation resistance, but the cathode of energy storage type rail vehicle and its cathode of charging system are equal
It is ground connection, therefore state of insulation is measured using the resistance value of detection insulation resistance and is not particularly suited for the charging of energy storage type rail vehicle
System.Moreover, existing Insulation monitoring mode requires greatly additional detection circuit, testing cost is higher.
Therefore, how to provide a kind of scheme of solution above-mentioned technical problem is that those skilled in the art needs to solve at present
The problem of.
Summary of the invention
The object of the present invention is to provide the insulation detecting method and controller of a kind of energy storage type rail vehicle charging system, solutions
The Insulation monitoring problem determined under energy storage type rail vehicle and its charging system cathode Grounding, to ensure that energy storage type rail
The charging security of road vehicle；And it is not necessarily to additional detection circuit, only respective handling need to be done to data on software, from
And save testing cost.
In order to solve the above technical problems, the present invention provides a kind of Insulation monitoring sides of energy storage type rail vehicle charging system
Method, the controller applied to charging system, comprising:
It obtains in advance in the case where the charging system charges normal, the accumulation power supply both ends of energy storage type rail vehicle
Voltage of the voltage within the preset charged time rises desired value；
During the charging system is that the energy storage type rail vehicle charges, pass through the output of the charging system
The voltage at accumulation power supply both ends described in voltage sensor real-time detection, and periodically seek its electricity within the preset charged time
Pressure rises actual value；
When the voltage rises the voltage value differed between desired value and voltage rising actual value no more than default electricity
When pressing threshold value, determine that the charging system is in normal insulation state；When the voltage value of the two difference is greater than described preset
When voltage threshold, determine that the charging system is in abnormal state of insulation.
Preferably, the preparatory acquisition is in the case where the charging system charges normal, the storage of energy storage type rail vehicle
Voltage of the voltage of energy both ends of power within the preset charged time rises the process of desired value specifically:
Previously according to relational expressionThe voltage for seeking the accumulation power supply both ends of energy storage type rail vehicle is filled default
Voltage in the electric time rises desired value, wherein Δ U is that the voltage rises desired value, and I is the charging electricity of the charging system
Stream, Δ t are the preset charged time, and C is the capacitance of super capacitor in the accumulation power supply.
Preferably, the process for periodically seeking its voltage rising actual value within the preset charged time is specific
Are as follows:
When by moment voltage value after after the preset charged time with preceding before moment voltage value after described
It is poor to carve the corresponding work of voltage value, to seek the voltage at the accumulation power supply both ends in real time on the voltage in the preset charged time
Rise actual value.
Preferably, the insulation detecting method further include:
Preset the corresponding short-circuit voltage change threshold of the charging system；
It is then described when the voltage value of the two difference is greater than the predetermined voltage threshold, it determines at the charging system
In the process of abnormal state of insulation specifically:
When the two difference the voltage value be greater than the predetermined voltage threshold, and the voltage rise actual value be greater than institute
When stating short-circuit voltage change threshold, the output end electric leakage of the charging system is determined；When the voltage value of the two difference is greater than
The predetermined voltage threshold, and the voltage rise actual value be not more than the short-circuit voltage change threshold when, determine described in fill
The output terminal shortcircuit of electric system.
Preferably, described to work as the voltage value differed between voltage rising desired value and voltage rising actual value not
When greater than predetermined voltage threshold, determine that the charging system is in normal insulation state；When the voltage value of the two difference is big
When the predetermined voltage threshold, determine that the charging system is in the process of abnormal state of insulation specifically:
According to relational expressionThe ratio that the voltage rises actual value and the voltage rises desired value is sought,
In, Δ U' is that the voltage rises actual value, and Δ U is that the voltage rises desired value；
As K1≤K≤1, determine that the charging system is in normal insulation state；As K2 < K < K1, described in determination
The output end of charging system leaks electricity；As 0≤K≤K2, the output terminal shortcircuit of the charging system is determined；Wherein, 1 > K1 > K2
> 0, K1 are the acquisition precision previously according to the charging system and the electric leakage fractional threshold set by operating condition that charges, and K2 is preparatory
According to short-circuit fractional threshold set by the acquisition precision of the charging system and charging operating condition.
Preferably, the insulation detecting method further include:
When the output end for determining the charging system leaks electricity, controls the charging system and stop charging, and described in control
The display screen of charging system shows leak current fault information；
When determining the output terminal shortcircuit of the charging system, controls the charging system and stop charging, and described in control
The display screen of charging system shows short trouble information.
Preferably, K1=0.8, K2=0.2.
In order to solve the above technical problems, the present invention also provides a kind of controller of energy storage type rail vehicle charging system,
Include:
Desired value acquiring unit, for being obtained in advance in the case where the charging system charges normal, energy storage type track
Voltage of the voltage at the accumulation power supply both ends of vehicle within the preset charged time rises desired value；
Actual value seeks unit, for leading to during the charging system is that the energy storage type rail vehicle charges
The voltage at accumulation power supply both ends described in the output voltage sensor real-time detection of the charging system is crossed, and periodically seeks it in institute
The voltage stated in the preset charged time rises actual value；
State of insulation determination unit, for being differed between desired value and voltage rising actual value when the voltage rises
Voltage value be not more than predetermined voltage threshold when, determine that the charging system is in normal insulation state；When the institute of the two difference
When stating voltage value greater than the predetermined voltage threshold, determine that the charging system is in abnormal state of insulation.
Preferably, the desired value acquiring unit is specifically used for previously according to relational expressionSeek energy storage type rail
Voltage of the voltage at the accumulation power supply both ends of road vehicle within the preset charged time rises desired value, wherein Δ U is the voltage
Rise desired value, I is the charging current of the charging system, and Δ t is the preset charged time, and C is in the accumulation power supply
The capacitance of super capacitor.
Preferably, the controller further include:
Short-circuit threshold value presets unit, for presetting the corresponding short-circuit voltage change threshold of the charging system；
Then the state of insulation determination unit includes:
First determine subelement, for differing between actual value when the voltage rises desired value and the voltage and rises
When voltage value is not more than predetermined voltage threshold, determine that the charging system is in normal insulation state；
Second determines subelement, for being greater than the predetermined voltage threshold when the voltage value of the two difference, and it is described
When voltage rises actual value greater than the short-circuit voltage change threshold, the output end electric leakage of the charging system is determined；
Third determines subelement, for being greater than the predetermined voltage threshold when the voltage value of the two difference, and it is described
When voltage rises actual value no more than the short-circuit voltage change threshold, the output terminal shortcircuit of the charging system is determined.
The present invention provides a kind of insulation detecting methods of energy storage type rail vehicle charging system, applied to charging system
Controller, comprising: it obtains in advance in the case where charging system charges normal, the accumulation power supply both ends of energy storage type rail vehicle
Voltage of the voltage within the preset charged time rises desired value；During charging system is that energy storage type rail vehicle charges,
By the voltage at the output voltage sensor real-time detection accumulation power supply both ends of charging system, and it is periodically sought in preset charged
Voltage in time rises actual value；It is not more than when voltage rises the voltage value differed between desired value and voltage rising actual value
When predetermined voltage threshold, determine that charging system is in normal insulation state；When the voltage value of the two difference is greater than predeterminated voltage threshold
When value, determine that charging system is in abnormal state of insulation.
The application is considered in the case where charging system charges normal (i.e. charging system is in normal insulation state), is stored up
It is a definite value that voltage of the voltage at the accumulation power supply both ends of energy formula rail vehicle within certain charging time, which rises desired value, so
The corresponding voltage of seeking of the application rises actual value, when voltage rises the voltage value differed between desired value and voltage rising actual value
When within the allowable range, it is believed that charging system is now in normal insulation state；Otherwise in abnormal state of insulation, to solve
Insulation monitoring problem under energy storage type rail vehicle and its charging system cathode Grounding, and then ensure that energy storage type track
The charging security of vehicle.Moreover, the insulation detecting method of the application is not necessarily to additional detection circuit, it only need to be right on software
Data do respective handling, to save testing cost.
The present invention also provides a kind of controllers of energy storage type rail vehicle charging system, have with above-mentioned insulation detecting method
There is identical beneficial effect.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to institute in the prior art and embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is a kind of flow chart of the insulation detecting method of energy storage type rail vehicle charging system provided by the invention；
Fig. 2 is a kind of charging schematic diagram of energy storage type rail vehicle provided by the invention；
Fig. 3 (a) is a kind of charging schematic diagram of the charging system provided by the invention when charging normal；
Fig. 3 (b) is a kind of charging schematic diagram of the charging system provided by the invention under the charging situation that leaks electricity；
Fig. 4 is a kind of structural schematic diagram of the controller of energy storage type rail vehicle charging system provided by the invention.
Specific embodiment
Core of the invention is to provide the insulation detecting method and controller of a kind of energy storage type rail vehicle charging system, solution
The Insulation monitoring problem determined under energy storage type rail vehicle and its charging system cathode Grounding, to ensure that energy storage type rail
The charging security of road vehicle；And it is not necessarily to additional detection circuit, only respective handling need to be done to data on software, from
And save testing cost.
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Fig. 1 is please referred to, Fig. 1 is a kind of insulation detecting method of energy storage type rail vehicle charging system provided by the invention
Flow chart.
The insulation detecting method of the energy storage type rail vehicle charging system is applied to the controller of charging system, comprising:
Step S1: the accumulation power supply two of energy storage type rail vehicle in the case where charging system charges normal is obtained in advance
Voltage of the voltage at end within the preset charged time rises desired value.
It should be noted that the default of the application sets in advance, it is only necessary to which setting is primary, unless according to practical feelings
Condition needs to modify, and does not otherwise need to reset.
Specifically, referring to figure 2., Fig. 2 is a kind of charging schematic diagram of energy storage type rail vehicle provided by the invention.Fig. 2
In, 1- charging system, 2- fuse output, 3- current collector, 4- charging rail, 5- energy-storage type vehicle, 6- rail；Wherein, Charging
System 1 is mainly made of controller, current transforming unit, output current sensor, output voltage sensor and fuse output 2 etc..More
In detail, the output cathode DC+ of charging system 1 is connected by cable with charging rail 4, output negative pole DC- passes through cable and rail 6
It is connected.The anode of the accumulation power supply (referred to as vehicle-mounted accumulation power supply) of energy-storage type vehicle 5 is connected with current collector 3, cathode and shaft end connect
Ground device is connected.After energy-storage type vehicle 5, which is driven into, stops section, current collector 3 is contacted with charging rail 4, the control of charging system 1 at this time
Device processed can detect that the voltage at vehicle-mounted accumulation power supply both ends, charging system 1 start as vehicle-mounted storage by output voltage sensor
It can power source charges.
(a) and Fig. 3 (b) referring to figure 3., Fig. 3 (a) are a kind of charging system provided by the invention when charging normal
Charging schematic diagram, Fig. 3 (b) is a kind of charging schematic diagram of the charging system provided by the invention under the charging situation that leaks electricity.
As shown in Fig. 3 (a), in the case where charging system charges normal (i.e. charging system is in normal insulation state),
Its electrode cable over the ground between insulate, impedance is infinitely great, the input current of the vehicle-mounted accumulation power supply of charging current I=of charging system
I1.As shown in Fig. 3 (b), when occur electrode cable it is damaged in the case where, electrode cable over the ground between impedance reduce, Charging
The charging current I of system understands some and is discharged over the ground by breakage, produces leakage current I2, then the charging of charging system at this time
Electric current I is the input current I of vehicle-mounted accumulation power supply1With leakage current I2The sum of, i.e. I=I1+I2。
The accumulation power supply of known energy storage type rail vehicle is made of in series and parallel super capacitor, special according to the charging of super capacitor
Property Q=Δ UC=I1Δ t, it is known that the voltage of vehicle-mounted accumulation power supply rises change rate:Wherein, Q is vehicle-mounted storage
The quantity of electric charge of energy power supply, Δ t are the preset charged time, and Δ U is the voltage rising value of the vehicle-mounted accumulation power supply in Δ t, and C is vehicle-mounted
The capacitance (total capacitance value) of super capacitor in accumulation power supply.As it can be seen that in the case where charging system charges normal,Moreover, it is theoretically a fixed that voltage rises change rate in the case that charging current I, capacitance C are certain
Value (the consumption electricity of vehicle load is ignored, and voltage rises change rate and is substantially secured to some range).Therefore, it is not depositing
In the case where leakage current, the voltage rising value within the identical charging timeTheoretically a definite value (is being not present
Voltage rising value in the case where leakage current is known as voltage and rises desired value), then vehicle-mounted accumulation power supply is in preset charged time Δ t
Interior voltage change are as follows:Wherein, U1For in the voltage value at the first moment, referred to as before moment voltage
Value, U2For the timing since the first moment, timing time reaches voltage value when preset charged time Δ t, referred to as rear moment electricity
Pressure value.
If occurring cable failure in charging system charging process, electrode cable discharges over the ground generates leakage current or short circuit, then
The input current I of vehicle-mounted accumulation power supply1Become smaller, voltage rises change rate and changes therewith.At this point, due to I1Reduce, so Δ U
It is corresponding to reduce.Based on this, the application can use the controller of charging system script and output voltage sensor real-time monitoring is filled
The voltage change of vehicle-mounted accumulation power supply (output voltage sensor: detects the voltage at vehicle-mounted accumulation power supply both ends, and passes in electric process
It send to controller；Controller: the voltage change of the vehicle-mounted accumulation power supply of real-time monitoring), so that the state of insulation of charging system is measured,
Without additional detection circuit, to save testing cost.
Specifically, then the application is directed to current energy storage type railcar firstly the need of a charging time is arranged in advance
Capacitor's capacity and its charging system charging current, seek in the case where charging system charges normal, vehicle-mounted energy storage electricity
Voltage of the voltage at source both ends within the set charging time rises desired value.
Step S2: during charging system is that energy storage type rail vehicle charges, pass through the output voltage of charging system
The voltage at sensor real-time detection accumulation power supply both ends, and periodically seek its voltage within the preset charged time and rise reality
Value.
Specifically, in order to measure the state of insulation of charging system, practical in charging system is the charging of energy storage type rail vehicle
During, by the voltage at the vehicle-mounted accumulation power supply both ends of the output voltage sensor real-time detection of charging system, and periodically ask
Voltage of load of the picking up the car accumulation power supply within the set charging time rises actual value, for the subsequent state of insulation for measuring charging system
It lays the foundation.
Step S3: when voltage rises the voltage value differed between desired value and voltage rising actual value no more than predeterminated voltage
When threshold value, determine that charging system is in normal insulation state；When the voltage value of the two difference is greater than predetermined voltage threshold, determine
Charging system is in abnormal state of insulation.
Specifically, it was known that ideally: voltage rises actual value=voltage and rises desired value, but the application is in view of storage
For energy formula rail vehicle in charging, the ancillary equipments such as air-conditioning for being included can consume part energy, so that vehicle-mounted energy storage is electric
The voltage in source rises actual value and is slightly less than voltage rising desired value.So a voltage threshold is arranged (according to vehicle in the application in advance
Auxiliary electricity consumption and loss are to determine), it is believed that: if the voltage value of the two difference is not more than set voltage threshold, at charging system
In normal insulation state；If the voltage value of the two difference is greater than set voltage threshold, charging system is in abnormal state of insulation.It can
See, the application can in a relatively short period of time judge abnormal state of insulation, can be in abnormal insulation shape in charging system
It cuts off the power immediately when state, to ensure that the charging security of energy storage type rail vehicle, and avoids result in more serious equipment
Loss.
The present invention provides a kind of insulation detecting methods of energy storage type rail vehicle charging system, applied to charging system
Controller, comprising: it obtains in advance in the case where charging system charges normal, the accumulation power supply both ends of energy storage type rail vehicle
Voltage of the voltage within the preset charged time rises desired value；During charging system is that energy storage type rail vehicle charges,
By the voltage at the output voltage sensor real-time detection accumulation power supply both ends of charging system, and it is periodically sought in preset charged
Voltage in time rises actual value；It is not more than when voltage rises the voltage value differed between desired value and voltage rising actual value
When predetermined voltage threshold, determine that charging system is in normal insulation state；When the voltage value of the two difference is greater than predeterminated voltage threshold
When value, determine that charging system is in abnormal state of insulation.
The application consider in the case where charging system charges normal, the accumulation power supply both ends of energy storage type rail vehicle
It is a definite value that voltage of the voltage within certain charging time, which rises desired value, so the corresponding voltage of seeking of the application rises reality
Value, when voltage, which rises desired value and voltage, rises the voltage value that differs between actual value within the allowable range, it is believed that Charging
System is now in normal insulation state；Otherwise in abnormal state of insulation, to solve energy storage type rail vehicle and its charging
Insulation monitoring problem under system cathode Grounding, and then ensure that the charging security of energy storage type rail vehicle.Moreover, this
The insulation detecting method of application is not necessarily to additional detection circuit, only need to do respective handling to data on software, thus
Save testing cost.
On the basis of the above embodiments:
As a kind of preferred embodiment, the energy storage type railcar in the case where charging system charges normal is obtained in advance
The voltage of the voltage within the preset charged time at accumulation power supply both ends rise the process of desired value specifically:
Previously according to relational expressionThe voltage for seeking the accumulation power supply both ends of energy storage type rail vehicle is filled default
Voltage in the electric time rises desired value, wherein Δ U is that voltage rises desired value, and I is the charging current of charging system, and Δ t is
Preset charged time, C are the capacitance of super capacitor in accumulation power supply.
Specifically, the content of the present embodiment has been discussed in detail in above-described embodiment, and details are not described herein by the application.
As a kind of preferred embodiment, the process that its voltage within the preset charged time rises actual value is periodically sought
Specifically:
By moment voltage value after after the preset charged time and the preceding moment voltage value before the moment voltage value after
Corresponding work is poor, rises actual value to seek voltage of the voltage at accumulation power supply both ends within the preset charged time in real time.
Specifically, to realize that seeking voltage of the vehicle-mounted accumulation power supply within the set charging time in real time rises actual value, this
Before all detection voltages (1s, 2s, 3s ...) since the voltage at the vehicle-mounted accumulation power supply both ends of initial detecting are used as by application
The set of moment voltage value, by all inspections after set charging time Δ t (being determined according to the practical charging operating condition of charging system)
Voltage (1s+ Δ t, 2s+ Δ t, 3s+ Δ t ...) set of moment voltage value as after is surveyed, so that moment voltage value is with before by after
Moment voltage value, which corresponds, makees poor (since 1s+ time Δt, primary voltage was sought every one second and rises actual value), thus
It realizes and seeks the purpose that voltage rises actual value in real time.
Certainly, the application can also periodically seek voltage rising actual value, i.e., since 1s+ time Δt, every default
Cycle time (being greater than one second) seeks primary voltage and rises actual value.It is real as seeking in real time or periodically seeking voltage rising
Actual value, the application are not particularly limited herein, according to the actual situation depending on.
As a kind of preferred embodiment, the insulation detecting method further include:
Preset the corresponding short-circuit voltage change threshold of charging system；
Then when the voltage value of the two difference is greater than predetermined voltage threshold, determine that charging system is in abnormal state of insulation
Process specifically:
When the two difference voltage value be greater than predetermined voltage threshold, and voltage rise actual value be greater than short-circuit voltage change threshold
When value, the output end electric leakage of charging system is determined；When the voltage value of the two difference is greater than predetermined voltage threshold, and voltage rising reality
When actual value is not more than short-circuit voltage change threshold, the output terminal shortcircuit of charging system is determined.
Further, charging system is in situation there are two types of abnormal state of insulations: the output end electric leakage of charging system (has leakage
Electric current but incomplete shorted to earth, therefore there is certain resistance over the ground in electrode cable, the voltage of vehicle-mounted accumulation power supply rises practical
Value can be less than voltage rise desired value, but the voltage of vehicle-mounted accumulation power supply still has visible variation) and charging system output end
Short circuit (the voltage change very little of vehicle-mounted accumulation power supply at this time, in the case where complete shorted to earth, the charging of vehicle-mounted accumulation power supply
Electric current is 0, and voltage does not change substantially).
Based on this, the application is on the basis of charging system is in abnormal state of insulation, according to the electricity of vehicle-mounted accumulation power supply
Buckling size determines that the output end of charging system belongs to drain conditions or short-circuit conditions.Specifically, the application is set in advance
Set a short-circuit voltage change threshold, it is believed that: if the voltage value of the two difference is greater than set voltage threshold, and voltage rises reality
Value is greater than set short-circuit voltage change threshold, and the output end of charging system leaks electricity；If the voltage value of the two difference is greater than set electricity
Threshold value is pressed, and voltage rises actual value and is not more than short-circuit voltage change threshold, the output terminal shortcircuit of charging system.
As a kind of preferred embodiment, when voltage rises the voltage value differed between desired value and voltage rising actual value
When no more than predetermined voltage threshold, determine that charging system is in normal insulation state；It is preset when the voltage value of the two difference is greater than
When voltage threshold, determine that charging system is in the process of abnormal state of insulation specifically:
According to relational expressionSeek the ratio that voltage rises actual value and voltage rises desired value, wherein Δ U'
Rise actual value for voltage, Δ U is that voltage rises desired value；
As K1≤K≤1, determine that charging system is in normal insulation state；As K2 < K < K1, charging system is determined
Output end electric leakage；As 0≤K≤K2, the output terminal shortcircuit of charging system is determined；Wherein, 1 > K1 > K2 > 0, K1 is preparatory
According to electric leakage fractional threshold set by the acquisition precision of charging system and charging operating condition, K2 is adopting previously according to charging system
Collect short-circuit fractional threshold set by precision and charging operating condition.
Specifically, ratio mode, which can be used, in the application indicates that voltage rises the value between actual value and voltage rising desired value
Gap, K=voltage rise actual value/voltage and rise desired value.Correspondingly, setting electric leakage fractional threshold K1 and short-circuit fractional threshold
K2, it is believed that: if (ideally K=1, vehicle assist electricity consumption and are lost smaller, and K is closer to 1), then charging system for K1≤K≤1
In normal insulation state；If K2 < K < K1, the output end of charging system leaks electricity；If 0≤K≤K2, the output end of charging system
Short circuit.
Certainly, the poor mode of work, which can also be used, in the application indicates that voltage rises the value between actual value and voltage rising desired value
Gap, the application are not particularly limited herein.
As a kind of preferred embodiment, the insulation detecting method further include:
When the output end for determining charging system leaks electricity, control charging system stops charging, and controls the aobvious of charging system
Display screen shows leak current fault information；
When determining the output terminal shortcircuit of charging system, control charging system stops charging, and controls the aobvious of charging system
Display screen shows short trouble information.
Further, the insulation detecting method of the application further include: when determining that charging system is in abnormal state of insulation,
It controls charging system and stops charging, to guarantee the safety of charging；And the display screen for controlling charging system shows corresponding failure
(output end of charging system leaks electricity-shows leak current fault information information, output terminal shortcircuit-display short trouble of charging system
Information), to remind administrative staff to carry out troubleshooting in time.
As a kind of preferred embodiment, K1=0.8, K2=0.2.
Specifically, according to project reality and experience, K1=0.8, K2=0.2 are set, the application is not done especially herein
Restriction, can be adjusted according to the acquisition precision of current charging system and charging operating condition.
Referring to figure 4., Fig. 4 is that a kind of structure of the controller of energy storage type rail vehicle charging system provided by the invention is shown
It is intended to.
The controller of the energy storage type rail vehicle charging system includes:
Desired value acquiring unit 01, for being obtained in advance in the case where charging system charges normal, energy storage type railcar
The voltage of the voltage within the preset charged time at accumulation power supply both ends rise desired value；
Actual value seeks unit 02, for passing through charging during charging system is that energy storage type rail vehicle charges
The voltage at the output voltage sensor real-time detection accumulation power supply both ends of system, and it is periodically sought within the preset charged time
Voltage rises actual value；
State of insulation determination unit 03, for rising the voltage differed between desired value and voltage rising actual value when voltage
When value is no more than predetermined voltage threshold, determine that charging system is in normal insulation state；When the voltage value of the two difference is greater than in advance
If when voltage threshold, determining that charging system is in abnormal state of insulation.
As a kind of preferred embodiment, it is contemplated that value acquiring unit 01 is specifically used for previously according to relational expression
It seeks voltage of the voltage at the accumulation power supply both ends of energy storage type rail vehicle within the preset charged time and rises desired value, wherein
Δ U is that voltage rises desired value, and I is the charging current of charging system, and Δ t is the preset charged time, and C is super in accumulation power supply
The capacitance of capacitor.
As a kind of preferred embodiment, the controller further include:
Short-circuit threshold value presets unit, for presetting the corresponding short-circuit voltage change threshold of charging system；
Then state of insulation determination unit 03 includes:
First determines subelement, for rising the voltage value differed between desired value and voltage rising actual value not when voltage
When greater than predetermined voltage threshold, determine that charging system is in normal insulation state；
Second determines subelement, and the voltage value for working as the two difference is greater than predetermined voltage threshold, and voltage rises reality
When value is greater than short-circuit voltage change threshold, the output end electric leakage of charging system is determined；
Third determines subelement, and for being greater than predetermined voltage threshold when the voltage value of the two difference, and voltage rising is practical
When value is no more than short-circuit voltage change threshold, the output terminal shortcircuit of charging system is determined.
The introduction of controller provided by the present application please refers to the embodiment of above-mentioned insulation detecting method, and the application is herein no longer
It repeats.
It should also be noted that, in the present specification, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that the process, method, article or equipment for including a series of elements not only includes that
A little elements, but also including other elements that are not explicitly listed, or further include for this process, method, article or
The intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...", is not arranged
Except there is also other identical elements in the process, method, article or apparatus that includes the element.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (10)
1. a kind of insulation detecting method of energy storage type rail vehicle charging system, which is characterized in that the control applied to charging system
Device processed, comprising:
The voltage at the accumulation power supply both ends of energy storage type rail vehicle in the case where the charging system charges normal is obtained in advance
Voltage within the preset charged time rises desired value；
During the charging system is that the energy storage type rail vehicle charges, pass through the output voltage of the charging system
The voltage at accumulation power supply both ends described in sensor real-time detection, and it is periodically sought on the voltage in the preset charged time
Rise actual value；
When the voltage rises the voltage value differed between desired value and voltage rising actual value no more than predeterminated voltage threshold
When value, determine that the charging system is in normal insulation state；When the voltage value of the two difference is greater than the predeterminated voltage
When threshold value, determine that the charging system is in abnormal state of insulation.
2. the insulation detecting method of energy storage type rail vehicle charging system as described in claim 1, which is characterized in that described pre-
It first obtains in the case where the charging system charges normal, the voltage at the accumulation power supply both ends of energy storage type rail vehicle is default
Voltage in charging time rises the process of desired value specifically:
Previously according to relational expressionThe voltage at accumulation power supply both ends of energy storage type rail vehicle is sought in preset charged
Interior voltage rises desired value, wherein and Δ U is that the voltage rises desired value, and I is the charging current of the charging system,
Δ t is the preset charged time, and C is the capacitance of super capacitor in the accumulation power supply.
3. the insulation detecting method of energy storage type rail vehicle charging system as claimed in claim 2, which is characterized in that described fixed
Expect the process that the voltage for taking it within the preset charged time rises actual value specifically:
By moment voltage value after after the preset charged time and the electricity of preceding moment before the moment voltage value after described
The corresponding work of pressure value is poor, is risen in fact with seeking voltage of the voltage at the accumulation power supply both ends within the preset charged time in real time
Actual value.
4. the insulation detecting method of energy storage type rail vehicle charging system as described in any one of claims 1-3, feature exist
In the insulation detecting method further include:
Preset the corresponding short-circuit voltage change threshold of the charging system；
It is then described when the voltage value of the two difference is greater than the predetermined voltage threshold, determine that the charging system is in different
The process of normal state of insulation specifically:
When the two difference the voltage value be greater than the predetermined voltage threshold, and the voltage rise actual value be greater than it is described short
When the voltage change threshold value of road, the output end electric leakage of the charging system is determined；Described in being greater than when the voltage value of the two difference
Predetermined voltage threshold, and the voltage rise actual value be not more than the short-circuit voltage change threshold when, determine the Charging
The output terminal shortcircuit of system.
5. the insulation detecting method of energy storage type rail vehicle charging system as claimed in claim 4, which is characterized in that described to work as
When the voltage rises the voltage value differed between desired value and voltage rising actual value no more than predetermined voltage threshold, really
The fixed charging system is in normal insulation state；When the voltage value of the two difference is greater than the predetermined voltage threshold,
Determine that the charging system is in the process of abnormal state of insulation specifically:
According to relational expressionSeek the ratio that the voltage rises actual value and the voltage rises desired value, wherein Δ
U' is that the voltage rises actual value, and Δ U is that the voltage rises desired value；
As K1≤K≤1, determine that the charging system is in normal insulation state；As K2 < K < K1, the charging is determined
The output end of system leaks electricity；As 0≤K≤K2, the output terminal shortcircuit of the charging system is determined；Wherein, 1 > K1 > K2 > 0,
K1 be previously according to the charging system acquisition precision and charging operating condition set by electric leakage fractional threshold, K2 be previously according to
Short-circuit fractional threshold set by the acquisition precision and charging operating condition of the charging system.
6. the insulation detecting method of rail vehicle charging system as claimed in claim 5, which is characterized in that the Insulation monitoring side
Method further include:
When the output end for determining the charging system leaks electricity, controls the charging system and stop charging, and control the charging
The display screen of system shows leak current fault information；
When determining the output terminal shortcircuit of the charging system, controls the charging system and stop charging, and control the charging
The display screen of system shows short trouble information.
7. the insulation detecting method of rail vehicle charging system as claimed in claim 5, which is characterized in that K1=0.8, K2=
0.2。
8. a kind of controller of energy storage type rail vehicle charging system characterized by comprising
Desired value acquiring unit, for being obtained in advance in the case where the charging system charges normal, energy storage type rail vehicle
The voltage of the voltage within the preset charged time at accumulation power supply both ends rise desired value；
Actual value seeks unit, for passing through institute during the charging system is that the energy storage type rail vehicle charges
The voltage at accumulation power supply both ends described in the output voltage sensor real-time detection of charging system is stated, and periodically seeks it described pre-
If the voltage in the charging time rises actual value；
State of insulation determination unit, for rising the electricity differed between desired value and voltage rising actual value when the voltage
When pressure value is not more than predetermined voltage threshold, determine that the charging system is in normal insulation state；When the electricity of the two difference
When pressure value is greater than the predetermined voltage threshold, determine that the charging system is in abnormal state of insulation.
9. the controller of energy storage type rail vehicle charging system as claimed in claim 8, which is characterized in that the desired value obtains
Unit is taken to be specifically used for previously according to relational expressionThe voltage for seeking the accumulation power supply both ends of energy storage type rail vehicle exists
Voltage in the preset charged time rises desired value, wherein Δ U is that the voltage rises desired value, and I is the charging system
Charging current, Δ t are the preset charged time, and C is the capacitance of super capacitor in the accumulation power supply.
10. such as the controller of the described in any item energy storage type rail vehicle charging systems of claim 8-9, which is characterized in that should
Controller further include:
Short-circuit threshold value presets unit, for presetting the corresponding short-circuit voltage change threshold of the charging system；
Then the state of insulation determination unit includes:
First determines subelement, for rising the voltage differed between desired value and voltage rising actual value when the voltage
When value is no more than predetermined voltage threshold, determine that the charging system is in normal insulation state；
Second determines subelement, for being greater than the predetermined voltage threshold, and the voltage when the voltage value of the two difference
When rising actual value greater than the short-circuit voltage change threshold, the output end electric leakage of the charging system is determined；
Third determines subelement, for being greater than the predetermined voltage threshold, and the voltage when the voltage value of the two difference
When rising actual value no more than the short-circuit voltage change threshold, the output terminal shortcircuit of the charging system is determined.
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| CN111114370A (en) * | 2019-12-17 | 2020-05-08 | 深圳市康凯斯信息技术有限公司 | Charging management method, device and equipment applied to electric vehicle |
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