CN108263248A - A kind of detection method and device of power train electric current - Google Patents
A kind of detection method and device of power train electric current Download PDFInfo
- Publication number
- CN108263248A CN108263248A CN201611260022.7A CN201611260022A CN108263248A CN 108263248 A CN108263248 A CN 108263248A CN 201611260022 A CN201611260022 A CN 201611260022A CN 108263248 A CN108263248 A CN 108263248A
- Authority
- CN
- China
- Prior art keywords
- current
- phase
- electric current
- output
- phase difference
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
- B60M3/00—Feeding power to supply lines in contact with collector on vehicles; Arrangements for consuming regenerative power
- B60M3/04—Arrangements for cutting in and out of individual track sections
-
- 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
- G01R31/005—Testing of electric installations on transport means
- G01R31/008—Testing of electric installations on transport means on air- or spacecraft, railway rolling stock or sea-going vessels
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Train Traffic Observation, Control, And Security (AREA)
Abstract
The present invention provides a kind of detection method and device of power train electric current,Applied to flexible automatic neutral-section passing device,By after the initial phase difference between the voltage-phase of the first supply arm and current phase is calculated,The first electric current is controlled to be added with the first predetermined current,Obtain electric current to be output,And it conveys electric current and is attached to neutral section in supply arm and flexible automatic passing over of neutral section,It powers for power train,Reduce the electric current that the first supply arm is provided in transition region by power train indirectly,Later using the current phase difference calculated again as the first phase difference to be judged,If the first phase difference to be judged is not overturn compared with initial phase difference,Then using electric current to be output as the first electric current,Sum operation is carried out again,Until it overturns,Determine that the output current at overturning moment is conveyed to neutral section,So as to accurately know size of current of the power train before transition region is driven into,Realize power train put between take over seamlessly.
Description
Technical field
The present invention relates to electric railway traction power supply systems to cross split-phase technical field, more specifically, being to be related to one kind
The detection method and device of power train electric current.
Background technology
As electric railway is increasingly becoming the main body of China Railway, power train is accurate, reliably runs relationship
To the overall safety of railway transportation.The traction power supply of China's power train uses single phase industrial frequence ac power supply method, in order to balance
The electric load that Three-phase Power Systems are provided needs to set electric split-phase, to prevent heterophase short-circuit.
At present, it where power train leads to phase splitting during section, needs to carry out power-off switching, so as to influence power train
Operating condition.Therefore, flexible automatic neutral-section passing device is used to solve the above problems, ensures easy to operate, the row of power train
Vehicle safety etc..
Wherein, the amplitude and phase that flexible automatic neutral-section passing device passes through neutral section voltage so that traction power supply arm with it is soft
Property automatic neutral-section passing device can be powered simultaneously for the power train in transition region, and will be gradually electricity by traction power supply arm
Power train provides electric current and is converted to and is provided by flexible automatic neutral-section passing device, so as to can when the power train drives into neutral section
To be powered completely by flexible automatic neutral-section passing device as it, to realize that power train can be without the logical phase splitting of power-off.
However, since flexible automatic neutral-section passing device is difficult to accurately know the electric current that power train drives into the transition region moment
Size, so that power train is being driven out to the transition region moment, power train electric current is in supply arm and flexible automatic passing over of neutral section dress
It can not complete to take over seamlessly between putting, power train is caused to be likely to occur arcing when leaving transition region.Therefore, there is an urgent need for one kind to be directed to
The detection method of the power train electric current of flexible automatic neutral-section passing device so that flexible automatic neutral-section passing device knows power train
In the accurate current size for driving into transition region moment power train, so as to complete power train electric current traction power supply arm with it is flexible
Taking over seamlessly between automatic neutral-section passing device so that power train can be realized on the basis of no power-off automatically by electricity point
The purpose of phase.
Invention content
In view of this, the present invention provides a kind of detection method and device of power train electric current, can make flexible automatic
Passing phase insulator device accurately knows the current flow that traction power supply arm is provided by power train, is being led with completing power train electric current
Draw taking over seamlessly between supply arm and flexible automatic neutral-section passing device, enable power train without power-off automatically by electricity point
Phase.
To achieve the above object, the present invention provides following technical solution：
A kind of detection method of power train electric current, applied to flexible automatic neutral-section passing device, including：
In the incoming telephone signal for receiving the transmission of the first current transformer, the voltage-phase and electric current of the first supply arm are calculated
Initial phase difference between phase, wherein, first supply arm is the electric power row before power train enters electric split-phase
Vehicle is powered, and first current transformer is arranged on the first supply arm end；
The first electric current is controlled to be added with the first predetermined current, obtains an increasing current, and the increasing current is made
For the electric current to be output of the flexible automatic neutral-section passing device, wherein, first electric current is the flexible automatic passing over of neutral section dress
Put that enter in transition region in the power train be electric current that the power train is powered；
By the current transmission to be output to neutral section, power for the power train；
The current phase difference between the voltage-phase of first supply arm and current phase is calculated, waits to judge as first
Phase difference；
Described first phase difference to be judged with the initial phase difference is compared, judges the described first phase to be judged
Whether difference overturns；
If first phase difference to be judged is not overturn, using the electric current to be output as the first electric current, and return
The first electric current of the control is added with the first predetermined current, obtains an increasing current, and using the increasing current as institute
State the electric current to be output of flexible automatic neutral-section passing device；
If first phase difference to be judged is overturn, using the electric current to be output as the output current determined,
It is transported to the neutral section.
Preferably, the initial phase difference between the voltage-phase for calculating the first supply arm and current phase, including：
The voltage-phase for first supply arm that receiving voltage mutual inductor is sent；
Receive the current phase for first supply arm that first current transformer is sent；
The voltage-phase of first supply arm and the current phase of first supply arm are made the difference, are calculated described
Initial phase difference between the voltage-phase and current phase of first supply arm.
Preferably, it after the described first phase difference to be judged is overturn, further includes：
The electric current to be output with the second predetermined current is made the difference, obtains decreasing current；
The decreasing current is transported to the neutral section；
The current phase difference between the voltage-phase of first supply arm and current phase is calculated, waits to judge as second
Phase difference；
Described second phase difference to be judged and the described first phase difference to be judged are compared, judge that described second waits to sentence
Whether disconnected phase difference overturns；
If second phase difference to be judged is overturn, using the electric current to be output as the output current determined,
It is transported to the neutral section.
Preferably, described using the electric current to be output as the output current determined, be transported to the neutral section it
Afterwards, it further includes：
In the incoming telephone signal for receiving the transmission of the second current transformer, control the output current pre- according to described first
If electric current successively decreases, until the output current is zero, wherein, before second current transformer is arranged on the second supply arm
End, second supply arm is that the power train is powered after the power train is driven out to electric split-phase.
A kind of detection device of power train electric current, including：
First computing module, in the incoming telephone signal for receiving the transmission of the first current transformer, calculating the first power supply
Initial phase difference between the voltage-phase and current phase of arm, wherein, first supply arm enters electricity point in power train
It is powered before phase for the power train, first current transformer is arranged on the first supply arm end；
Summation module, for the first electric current to be controlled to be added with the first predetermined current, one increasing current of acquisition, and by institute
To be output electric current of the increasing current as the flexible automatic neutral-section passing device is stated, wherein, first electric current is the flexibility
It is electric current that the power train is powered that automatic neutral-section passing device, which enters in the power train in transition region,；
First output module, for the current transmission to be output to neutral section, to be powered for the power train；
Second computing module, after in first output module by the current transmission to be output to neutral section, meter
The current phase difference between the voltage-phase of first supply arm and current phase is calculated, as the first phase difference to be judged；
First judgment module for the described first phase difference to be judged to be compared with the initial phase difference, judges
Whether first phase difference to be judged overturns；
Update module, for judging described first when judging that phase difference is not overturn in first judgment module,
Using the electric current to be output as the first electric current；
Correspondingly, the summation module, is additionally operable in the update module using the electric current to be output as the first electric current
Afterwards, the first electric current of control is added with the first predetermined current, obtains an increasing current, and using the increasing current as described in
The electric current to be output of flexible automatic neutral-section passing device；
Second output module, for judging that the described first phase difference to be judged is overturn in first judgment module
When, using the electric current to be output as the output current determined, it is transported to the neutral section.
Preferably, first computing module includes：
First phase receiving module, for the voltage-phase for first supply arm that receiving voltage mutual inductor is sent；
Second phase receiving module, for receiving the electric current for first supply arm that first current transformer is sent
Phase；
First does difference module, for by the current phase of the voltage-phase of first supply arm and first supply arm
It makes the difference, the initial phase difference between the voltage-phase of first supply arm and current phase is calculated.
Preferably, it after first judgment module judges that the described first phase difference to be judged is overturn, further includes：
Second does difference module, for the electric current to be output and second predetermined current to be made the difference, is successively decreased
Electric current；
Third output module, for the decreasing current to be conveyed to the neutral section；
Third computing module, for after the decreasing current is transported to the neutral section by the third output module,
The current phase difference between the voltage-phase of first supply arm and current phase is calculated, as the second phase difference to be judged；
Second judgment module, for the described second phase difference to be judged and the described first phase difference to be judged to be compared
Compared with judging whether the described second phase difference to be judged overturns；
4th output module, for judging that the described second phase difference to be judged is overturn in second judgment module
When, using the electric current to be output as the output current determined, it is transported to the neutral section.
Preferably, it is transported in second output module using the electric current to be output as the output current determined
After the neutrality section, further include：
Successively decrease module, in the incoming telephone signal for receiving the transmission of the second current transformer, controlling the output current
Successively decrease according to first predetermined current, until the output current is zero, wherein, the second current transformer setting
In the second supply arm front end, second supply arm is that the power train carries out after the power train is driven out to electric split-phase
Power supply.
It can be seen via above technical scheme that compared with prior art, the present invention provides a kind of power train electric currents
Detection method and device, applied to flexible automatic neutral-section passing device, by calculate the voltage-phase for obtaining the first supply arm with
After initial phase difference between current phase, the first electric current of control is added with the first predetermined current, obtains an increasing current,
And using the increasing current as electric current to be output, later by current transmission to be output to neutral section, power for power train, so as to
The electric current that the first supply arm is provided in transition region by power train is reduced indirectly, realizes supply arm and flexible automatic mistake
The gradually transfer of electric current provided between neutral section for power train, and the voltage-phase and electricity of the first supply arm are calculated again
The current phase difference between phase is flowed, as the first phase difference to be judged, if the first phase difference to be judged and initial phase difference ratio
Compared with not overturning, then using electric current to be output as the first electric current, carry out sum operation with the first predetermined current again, directly
It is overturn to the first phase difference to be judged, the electric current to be output at overturning moment will just occur as output current, in being transported to
Property section, at this point, what the size and phase of the output current and power train were provided before transition region is driven by supply arm for it
Size of current is consistent with phase, and then it is flat between supply arm and flexible automatic neutral-section passing device to realize power train electric current
Sliding cutting changes, and is powered when driving in neutral section for power train using the electric current, with reach power train without power-off from
The purpose of dynamic logical phase splitting.
Description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention, for those of ordinary skill in the art, without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is a kind of method flow diagram of the detection method of power train electric current provided in an embodiment of the present invention；
Fig. 2 is initial between a kind of voltage-phase for calculating the first supply arm provided in an embodiment of the present invention and current phase
The method flow diagram of phase difference method；
Fig. 3 is the method flow diagram of the detection method of another power train electric current provided in an embodiment of the present invention；
Fig. 4 is a kind of structure diagram of the detection device of power train electric current provided in an embodiment of the present invention；
Fig. 5 is the structure diagram of the detection device of another power train electric current provided in an embodiment of the present invention；
Fig. 6 is initial between a kind of voltage-phase for calculating the first supply arm provided in an embodiment of the present invention and current phase
The structure diagram of phase difference device；
Fig. 7 is the structure diagram of the detection device of another power train electric current provided in an embodiment of the present invention.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment shall fall within the protection scope of the present invention.
Present embodiment discloses a kind of detection methods of power train electric current, please applied to flexible automatic neutral-section passing device
Referring to attached drawing 1, the method specifically includes following steps：
S101：In the incoming telephone signal for receiving the transmission of the first current transformer, the voltage-phase of the first supply arm is calculated
Initial phase difference between current phase, wherein, first supply arm is described before power train enters electric split-phase
Power train is powered, and first current transformer is arranged on the first supply arm end；
Specifically, power train in automatic phase splitting, needs a transition in section where first passing through electric split-phase
Area, and accurate detection of the completion to the power train electric current in the transition region, the power train electric current for power train by sailing
The supply arm that tractive force is provided before entering transition region provides；In order to ensure power train is flexible automatic excessive when entering transition region
Phase device can know immediately, can provide the first supply arm end of electric current for it before transition region is entered for the power train
One section of detection line of parallel connection on the position of end and transition region front end, and the first current transformer is installed, for detecting whether in real time
There is power train to drive into the transition region, and then there can be electric current to flow through the first electric current mutual at the time of a certain power train drives into
Sensor so that first current transformer sends incoming telephone signal to flexible automatic neutral-section passing device, flexible automatic excessive with notice
Phase device current time has power train to drive into transition region, can continue to carry out subsequent electricity convenient for flexible automatic neutral-section passing device
Stream detection operation；Wherein, the mode of multiturn number parallel connection may be used to promote in the detection line involved by the embodiment of the present invention
The antijamming capability of one current transformer.
Secondly, after the incoming telephone signal for receiving the transmission of the first current transformer in flexible automatic neutral-section passing device, flexibility is certainly
Dynamic passing phase insulator device and the first supply arm are powered jointly to drive into the power train of transition region, meanwhile, the flexibility automatic passing over of neutral section
Device also is able to calculate the initial phase difference between the current voltage-phase of the first supply arm and current phase, Jin Erneng in real time
Enough using the initial phase difference judge power train electric current between traction power supply arm and flexible automatic neutral-section passing device whether
Complete smooth transfer.
S102：The first electric current is controlled to be added with the first predetermined current, obtains an increasing current, and be incremented by electricity by described
The electric current to be output as the flexible automatic neutral-section passing device is flowed, wherein, first electric current is described flexible automatic excessive
It is electric current that the power train is powered that phase device, which enters in the power train in transition region,；
Specifically, it is calculated between voltage-phase and the current phase of the first supply arm in flexible automatic neutral-section passing device
After initial phase difference, start the power train input current driven into transition region, as the first electric current；At this point, due to
It is to be powered simultaneously for power train by the first supply arm and flexible automatic neutral-section passing device in transition region, to ensure the electric power
Electric current of the train before and after transition region is driven into is always maintained at constant, therefore carries out sum operation in the first electric current and the first predetermined current
While, the first supply arm can reduce corresponding numerical value for the electric current that the power train is provided, and then realize supply arm with
The gradually transfer of electric current provided between flexible automatic neutral-section passing device for power train.
Wherein, the first predetermined current can be the value set according to increase in current characteristic, such as 0.1mA, 1mA；Meanwhile
It ensures that the detection completed in transition region to power train electric current, the increased speed of the first electric current can also be controlled,
To reduce the time needed for current detecting.
S103：By the current transmission to be output to neutral section, power for the power train；
Specifically, after flexible automatic neutral-section passing device controls the first electric current increase, it is also necessary to by what is obtained after increase
Current transmission to be output is powered to neutral section for power train.
S104：The current phase difference between the voltage-phase of first supply arm and current phase is calculated, as first
Phase difference to be judged；
Specifically, the current transmission to be output after increase is arranged to neutral section for electric power in flexible automatic neutral-section passing device
When vehicle is powered, the first supply arm can reduce corresponding numerical value for the electric current that the power train is provided, and then may lead to first
Current phase difference between the voltage-phase and current phase of supply arm changes, it is therefore desirable in real time to the first supply arm
Voltage-phase and current phase between current phase difference calculated, to ensure phase difference as newest numerical value.
S105：Described first phase difference to be judged with the initial phase difference is compared, judges that described first waits to sentence
Whether disconnected phase difference overturns, if not overturning, performs S106a, if overturning, performs S106b；
Specifically, since the first supply arm is its progress traction power supply before power train drives into electric split-phase, therefore first
Phase difference between the voltage-phase and current phase of supply arm may indicate that the current working condition of power train, such as phase difference
Close to 0 °, then show that power train is currently at traction working condition, phase difference then shows that power train is currently at system close to 180 °
It starts building condition, therefore, whether the phase difference between the voltage-phase of the first supply arm and current phase can be overturn, as
Power train electric current completes the basis for estimation taken over seamlessly between traction power supply arm and flexible automatic neutral-section passing device.
For example, when power train just drives into transition region, due to being that the first supply arm is powered for it, therefore first
Initial phase difference between the voltage-phase and current phase of supply arm is close to 0 °, flexible automatic neutral-section passing device control later the
One electric current increases so that the first supply arm reduces for the electric current of power train conveying, calculates the electricity of the first supply arm again at this time
The current phase difference between phase and current phase is pressed, if still close to 0 °, shows that the first supply arm is still supplied for power train
Electricity, phase difference are consistent with initial phase difference, S106a are performed, if calculating the voltage-phase of the first supply arm and electric current phase
Current phase difference between position then shows that phase difference is overturn close to 180 °, and the first supply arm is no longer arranged for electric power at this time
Vehicle is powered, and is provided completely by flexible automatic neutral-section passing device, therefore performs S106b.Wherein, the voltage-phase of the first supply arm with
It is that phase difference between current phase is overturn it may is that from being close to 180 ° of situation close to 0 ° of overturning, can also be
It is overturn from close to 180 ° as the situation close to 0 °.
S106a：Using the electric current to be output as the first electric current, and return to S102；
Specifically, after driving into transition region due to power train, flexible automatic neutral-section passing device is supplied for the power train
The first electric current for being there is provided of electricity be start from scratch it is increased, therefore, for the voltage-phase of the first supply arm and current phase it
Between phase difference occur overturning may need the first current increase to certain numerical value, correspondingly, the voltage phase to the first supply arm
The judgement the operation whether phase difference between position and current phase overturns may also need to carry out repeatedly, at this point, for each
The electric current to be output for failing to make the phase difference between the voltage-phase of the first supply arm and current phase to overturn, needing ought
As the first electric current, return performs the first electric current of control and is added with the first predetermined current preceding obtained electric current to be output,
It obtains an increasing current, and using the increasing current as the step for electric current to be output, and then is increased next time
After operation, judge again whether phase difference overturns, until it overturns, then to be output corresponding to the moment by overturning
Electric current is as the output current determined.
S106b：Using the electric current to be output as the output current determined, it is transported to the neutral section；
Specifically, when determining that the phase difference between the voltage-phase of the first supply arm and current phase is overturn, then
The phase difference is overturn at the time of point, the electric current to be output accessed by flexible automatic neutral-section passing device is as output electricity
Stream, and is transported to neutral section, meanwhile, also using the output current as power train from transition region drive into neutral section when, Xiang Qisuo
The electric current of offer, so that power train can automatically continue to travel without power-off.
Wherein, since the output current determined is carried before power train enters transition region with the first supply arm by it
The electric current of confession is consistent, and the size of electric current has been known with phase by flexible automatic neutral-section passing device, and then completes and electric power is arranged
Vehicle drives into the current detecting in transition region, subsequently can be according to the output current accurately known, to drive into the electric power in neutral section
Train is powered, and to ensure that power train electric current in phase splitting remains unchanged, avoids the occurrence of arcing.
The detection method of power train electric current disclosed by the embodiments of the present invention applied to flexible automatic neutral-section passing device, is led to
It crosses after the initial phase difference between the voltage-phase for obtaining the first supply arm and current phase is calculated, controls the first electric current and the
One predetermined current is added, and an increasing current is obtained, and using the increasing current as electric current to be output, later by electricity to be output
Stream is transported to neutral section, powers for power train, reduces the first supply arm indirectly and provided in transition region by power train
Electric current, realize electric current that power train is provided and be gradually switched to by the offer of the first supply arm by flexible automatic passing over of neutral section
The process that device provides, and the current phase difference between the voltage-phase of the first supply arm and current phase is calculated again, as
First phase difference to be judged, the result whether first overturn after judging phase difference and initial phase difference relatively is as electricity
Power train electric current completes the criterion taken over seamlessly between the first supply arm and flexible automatic neutral-section passing device, if not turning over
Turn, then using electric current to be output as the first electric current, be added again with the first predetermined current, until the first phase difference to be judged
It overturns, just using the electric current to be output at generation overturning moment as output current, thus before power train is driven out to transition region,
Accurately size of current and phase that power train is provided before transition region is driven by supply arm for it are detected, and realize
Power train electric current taking over seamlessly between supply arm and flexible automatic neutral-section passing device, while arranged using the electric current for electric power
Vehicle is powered when driving in neutral section, so that power train can be realized on the basis of no power-off automatically by electric split-phase
Purpose.
After above-described embodiment S106b, further include：
In the incoming telephone signal for receiving the transmission of the second current transformer, control the output current pre- according to described first
If electric current successively decreases, until the output current is zero, wherein, before second current transformer is arranged on the second supply arm
End, second supply arm is that the power train is powered after the power train is driven out to electric split-phase.
Specifically, in power train from neutral section is driven into during being driven out to neutral section, flexible automatic neutral-section passing device
The output current determined is transported to neutral section, and then is individually for the power train and is powered, later, is sailed in power train
Go out neutral section, during into another transition region, the second current transformer can receive electric current, and then to flexible automatic neutral-section passing device
The second incoming telephone signal is sent, the power train will be driven into from neutral section to another transition with notice flexible automatic neutral-section passing device
Area；
Wherein, the second current transformer, which can be installed on, is connected in parallel on another transition region end and the one of the second supply arm front end
In section detection line, the second supply arm can carry out short circuit, and continue after power train is driven out to the transition region with another transition region
It powers for it；In addition, the both ends in section are mounted on current transformer and voltage transformer, Jin Erneng where an electric split-phase
It is enough to cause flexible automatic neutral-section passing device when uplink and downlink exists simultaneously power train and sails phase splitting, respectively two electric power row
Vehicle carries out current detecting.
Secondly as output current size and phase that flexible automatic neutral-section passing device is provided for power train are
Know, therefore when the power train enters another transition region, it can be by the way that output current be controlled to be passed according to the first predetermined current
Reducing, until when being kept to zero, to complete power train electric current in flexible automatic neutral-section passing device and the second traction power supply arm
Between take over seamlessly, later after power train is driven out to the transition region, then by the second supply arm be individually for the power train into
Row power supply, the electric current provided are consistent with the output current that flexible automatic neutral-section passing device provides.
In the embodiment of the present invention, by when receiving the second incoming telephone signal that the second current transformer is sent, making output
Electric current carries out decrement operations according to the first predetermined current, until being kept to zero, completes power train electric current at this time flexible automatic
Taking over seamlessly between passing phase insulator device and the second supply arm had not only avoided generation arcing, but also enabled power train without disconnected
Electricity is automatically by an electric split-phase.
Refer to attached drawing 2, involved in above-described embodiment to the specific implementation process of S102 include the following steps：
S201：The voltage-phase for first supply arm that receiving voltage mutual inductor is sent；
Specifically, after the incoming telephone signal for receiving the transmission of the first current transformer in flexible automatic neutral-section passing device, it can
To get the current voltage-phase of the first supply arm in real time by voltage transformer；Wherein, voltage transformer may be mounted at
In the first supply arm detection line in parallel with flexible automatic neutral-section passing device.
S202：Receive the current phase for first supply arm that first current transformer is sent；
Specifically, after the incoming telephone signal for receiving the transmission of the first current transformer in flexible automatic neutral-section passing device, it is soft
Property automatic neutral-section passing device can get the current current phase of the first supply arm in real time by the first current transformer.
S203：The voltage-phase of first supply arm and the current phase of first supply arm are made the difference, calculated
Initial phase difference between the voltage-phase of first supply arm and current phase；
Specifically, flexible automatic neutral-section passing device will be got in real time from voltage transformer and the first current transformer respectively
The current voltage-phase of the first supply arm carry out doing difference operation with current phase, the voltage and electricity of the first supply arm can be obtained
Initial phase difference between stream, for being following needs train electric current between traction power supply arm and flexible automatic neutral-section passing device
Completion takes over seamlessly offer basis for estimation.
In the embodiment of the present invention, by voltage transformer and the first current transformer, flexible automatic neutral-section passing device can
The first supply arm currently accurate voltage-phase and current phase are got, and then the first power supply is obtained by doing difference operation in real time
Initial phase difference between the voltage and electric current of arm, convenient for being following needs train electric current in traction power supply arm and flexible automatic mistake
It completes to take over seamlessly offer accurately basis for estimation between neutral section.
Present embodiment discloses the detection method of another power train electric current, applied to flexible automatic neutral-section passing device,
Attached drawing 3 is referred to, the method specifically includes following steps：
S301：In the incoming telephone signal for receiving the transmission of the first current transformer, the voltage-phase of the first supply arm is calculated
Initial phase difference between current phase, wherein, first supply arm is described before power train enters electric split-phase
Power train is powered, and first current transformer is arranged on the first supply arm end.
S302：The first electric current is controlled to be added with the first predetermined current, obtains an increasing current, and be incremented by electricity by described
The electric current to be output as the flexible automatic neutral-section passing device is flowed, wherein, first electric current is described flexible automatic excessive
It is electric current that the power train is powered that phase device, which enters in the power train in transition region,.
S303：By the current transmission to be output to neutral section, power for the power train.
S304：The current phase difference between the voltage-phase of first supply arm and current phase is calculated, as first
Phase difference to be judged.
S305：Described first phase difference to be judged with the initial phase difference is compared, judges that described first waits to sentence
Whether disconnected phase difference overturns, if not overturning, performs S306, if overturning, performs S307.
S306：Using the electric current to be output as the first electric current, and return to S302.
S307：Using the electric current to be output as the output current determined, the neutral section is transported to, is performed later
S308；
S308：The electric current to be output with the second predetermined current is made the difference, obtains decreasing current, and perform S309；
Specifically, power train in the transition region where electric split-phase in section when driving, may due to some factors and
The working condition for causing the power train current changes, if power train will complete descending operation in transition region, at this point,
The working condition of power train can be converted to damped condition from traction working condition, correspondingly, the voltage of the first supply arm and electric current it
Between phase difference and then can cause to overturn, however lead to what phase difference was overturn from being close to 180 ° close to 0 ° of overturning
It is not power train electric current in traction power supply arm and flexible automatic passing over of neutral section the reason is that caused by power train itself braking
Between device complete take over seamlessly caused by, therefore, in order to avoid because power train in transition region due to other factors due to
Caused phase difference can be waited to judge there is a situation where overturning judging first between the voltage and electric current of the first supply arm
After phase difference is overturn, the electric current to be output got and the second predetermined current are carried out doing difference operation, for examining this
Whether secondary overturning is since power train electric current is completed to take over seamlessly between traction power supply arm and flexible automatic neutral-section passing device
Caused by；Wherein, the second predetermined current can be the value set according to increase in current characteristic, such as 0.1mA, 1mA.
S309：The decreasing current is conveyed to the neutral section, and perform S3010.
S3010：The current phase difference between the voltage-phase of first supply arm and current phase is calculated, as second
Phase difference to be judged, and perform S3011.
S3011：Described second phase difference to be judged and the described first phase difference to be judged are compared, judge described
Whether two phase differences to be judged overturn, if overturning, performs S3012；
Specifically, it carries out doing difference operation, and conveying the decreasing current of acquisition into electric current to be output and the second predetermined current
After the power train, the current phase difference progress again between the voltage-phase to the first supply arm and current phase is needed
It calculates, if current phase difference i.e. second is wait judging that phase difference and first after judging phase difference relatively, is overturn, then proved
The electric current that power train in transition region is provided is travelled on to be conveyed by flexible automatic neutral-section passing device, and then wait to sentence first
After once inside out has occurred compared with initial phase difference in disconnected phase difference, it is big that flexible automatic neutral-section passing device reduces the electric current that it is exported
It is small, the first supply arm is caused to provide portion of electrical current for power train again, so that the second phase difference to be judged is treated with first
It is overturn after judging phase difference, at this point it is possible to accurately detect that the first supply arm drives into transition region for power train
Preceding provided size of current and phase；If not overturning, it is due to other factors in transition region to prove power train
And the generation of this overturning is resulted in, it is supplied when driving into neutral section for power train using the electric current to be output obtained at this time
Electricity, then there may be arcings.
S3012：Using the electric current to be output as the output current determined, it is transported to the neutral section.
Specifically, judging second when judging that overturning has occurred in phase difference, it was demonstrated that power train electric current is being drawn
It completes to take over seamlessly between supply arm and flexible automatic neutral-section passing device, the electric current to be output that can be obtained current time is made
Be that power train enters the electric current provided in neutral section by flexible automatic neutral-section passing device so that power train can keep into
Enter the size of current and phase before electric split-phase, avoid arcing occurring, and can be without power-off automatically by electric split-phase.
In the detection method of power train electric current disclosed by the embodiments of the present invention, by occurring in the first phase difference to be judged
After overturning, currently obtained electric current to be output made the difference with the second predetermined current, and in the electricity that successively decreases that will be obtained
After stream is conveyed to power train, the current phase difference between the voltage-phase of the first supply arm and current phase is calculated again, is made
For the second phase difference to be judged, so that the second phase difference to be judged and the first phase difference to be judged are compared, if judging
Second phase difference to be judged is overturn, just using currently obtained electric current to be output as the output current determined, and
The power train is conveyed to, is powered to enter in neutral section in power train for it, and then effectively prevent because of electricity
There is a situation where overturn for phase difference caused by other factors in transition region for power train so that the inspection of power train electric current
It surveys more accurate.
Present embodiment discloses a kind of detection devices of power train electric current, refer to attached drawing 4, described device includes：
First computing module 401, in the incoming telephone signal for receiving the transmission of the first current transformer, calculating first and supplying
Initial phase difference between the voltage-phase and current phase of electric arm, wherein, first supply arm enters electricity in power train
It is powered before split-phase for the power train, first current transformer is arranged on the first supply arm end；
Summation module 402 for the first electric current to be controlled to be added with the first predetermined current, obtains an increasing current, and
Using the increasing current as the electric current to be output of the flexible automatic neutral-section passing device, wherein, first electric current is described
It is electric current that the power train is powered that flexible automatic neutral-section passing device, which enters in the power train in transition region,；
First output module 403, for the current transmission to be output to neutral section, to be powered for the power train；
Second computing module 404, in first output module 403 by the current transmission to be output to neutral section
Afterwards, the current phase difference between the voltage-phase of first supply arm and current phase is calculated, as the first phase to be judged
Difference；
First judgment module 405 for the described first phase difference to be judged to be compared with the initial phase difference, is sentenced
Whether first phase difference to be judged that breaks overturns；
Update module 406, for judging that the described first phase difference to be judged does not turn in first judgment module 405
When turning, using the electric current to be output as the first electric current；
Correspondingly, the summation module 402, is additionally operable in the update module 406 using the electric current to be output as
After one electric current, the first electric current of control is added with the first predetermined current, obtains an increasing current, and the increasing current is made
Electric current to be output for the flexible automatic neutral-section passing device；
Second output module 407, for judging that the described first phase difference to be judged occurs in first judgment module 405
During overturning, using the electric current to be output as the output current determined, it is transported to the neutral section.
The detection device of power train electric current disclosed by the embodiments of the present invention, by being calculated in the first computing module 401
After initial phase difference between the voltage-phase and current phase of first supply arm, then the first electric current controlled by summation module 402
It is added with the first predetermined current, obtains an increasing current, and using the increasing current as electric current to be output, first is defeated later
Go out 403 current transmission to be output of module to neutral section, power for power train, reduce the first supply arm indirectly in transition region
The electric current provided by power train realizes the electric current that power train is provided and is gradually switched to by the offer of the first supply arm
The process provided by flexible automatic neutral-section passing device, at this time the second computing module 404 calculate the first supply arm voltage-phase with
Current phase difference between current phase, as the first phase difference to be judged, first will judged by the first judgment module 405
The result whether overturn after judging phase difference and initial phase difference relatively is as power train electric current in the first supply arm
The criterion taken over seamlessly is completed between flexible automatic neutral-section passing device, if not overturning, update module 406 will be to be output
It is added, as the first electric current until the first phase to be judged by electric current by summation module 402 with the first predetermined current again
Potential difference is overturn, and the electric current to be output at overturning moment will occur for 407 ability of the second output module as output current, in being transported to
Property section, so as to before power train is driven out to transition region, accurately detected power train before transition region is driven by supply arm
For size of current and phase that it is provided, and power train electric current is realized between supply arm and flexible automatic neutral-section passing device
Take over seamlessly, while be powered when driving in neutral section for power train using the electric current so that power train can
The purpose automatically by electric split-phase is realized on the basis of no power-off.
The course of work of modules provided in an embodiment of the present invention please refers to the method flow diagram corresponding to attached drawing 1, tool
Body running process repeats no more.
The second output module 407 in the above-described embodiments using the electric current to be output as the output current determined,
It is transported to after the neutral section, further includes：
Module of successively decreasing 408, in the incoming telephone signal for receiving the transmission of the second current transformer, controlling the output electricity
Stream successively decreases according to first predetermined current, until the output current is zero, wherein, second current transformer is set
Put in the second supply arm front end, second supply arm be the power train after the power train is driven out to electric split-phase into
Row power supply.
In the embodiment of the present invention, by the way that when receiving the second incoming telephone signal that the second current transformer is sent, successively decrease mould
Block 408 makes output current carry out decrement operations according to the first predetermined current, until being kept to zero, completes power train electric current at this time
Taking over seamlessly between flexible automatic neutral-section passing device and the second supply arm not only avoids generation arcing, but also causes electric power row
Vehicle can be without power-off automatically by an electric split-phase.
Some possible application scenarios that the technical solution of 5 pairs of embodiment of the present invention is related to below in conjunction with the accompanying drawings are illustrated
It introduces.
As shown in Fig. 5 citings, when power train drives into transition region A from left to right, there is electric current to flow through current transformer
CT1 so that the Current Transmit 1 sends the first incoming telephone signal to flexible automatic neutral-section passing device, later, flexible automatic excessive
Phase device gets the initial phase difference between the voltage-phase of supply arm T α and current phase, and starts output current to neutrality
Section, is powered to the power train, and the electric current exported is started from scratch and increased every time according to 0.1mA, and electric current increases every time
After 0.1mA, flexible automatic neutral-section passing device can be all calculated in real time between voltage-phase and the current phase of supply arm T α
Current phase difference, and be compared as phase difference to be judged with initial phase difference, if judging phase difference to be judged
It does not overturn, then using current newest obtained electric current as the electric current participation addition meter for needing progress sum operation next time
It calculates, until phase difference to be judged is overturn, flexible automatic neutral-section passing device just will currently enable phase difference to be judged occur
The electric current of overturning is determined as this current detecting as a result, for when power train is driven out to transition region and enters neutral section, soft
Property automatic neutral-section passing device be individually for the power train power supply needed for export electric current；
The technical solution emphasis of the embodiment of the present invention is probed into the electricity exported using flexible automatic neutral-section passing device is increased
Stream realizes power train electric current taking over seamlessly, and by comparing between traction power supply arm and flexible automatic neutral-section passing device
Whether the initial phase difference between the voltage-phase and current phase of supply arm overturns with current phase difference, accurately knows
The actual value of power train electric current, subsequently to make power train without power-off automatically by electric split-phase.
Refer to attached drawing 6, involved in above-described embodiment to the first computing module 401 include：
First phase receiving module 4011, for the voltage phase for first supply arm that receiving voltage mutual inductor is sent
Position；
Second phase receiving module 4012, for receiving first supply arm of the first current transformer transmission
Current phase；
First does difference module 4013, for by the electric current of the voltage-phase of first supply arm and first supply arm
Phase makes the difference, and the initial phase difference between the voltage and electric current of first supply arm is calculated.
In the embodiment of the present invention, by first phase receiving module 4011 and second phase receiving module 4012, flexibility is certainly
Dynamic passing phase insulator device can get the first supply arm currently accurate voltage-phase and current phase, and then pass through first in real time
It does difference module 4013 and carries out doing difference operation and obtain the initial phase difference between the voltage and electric current of the first supply arm, convenient for being follow-up
Power train electric current complete to take over seamlessly between traction power supply arm and flexible automatic neutral-section passing device offer accurately judge according to
According to.
The course of work of modules provided in an embodiment of the present invention please refers to the method flow diagram corresponding to attached drawing 2, tool
Body running process repeats no more.
Present embodiment discloses the detection devices of another power train electric current, refer to attached drawing 7, described device includes：
First computing module 401, summation module 402, the first output module 403, the second computing module 404, first judges
Module 405, update module 406, the second output module 407, second does difference module 409, third output module 4010, and third calculates
Module 4011, the second judgment module 4012 and the 4th output module 4013；
Wherein, described second difference module 409 is done, for the electric current to be output and second predetermined current to be done
Difference obtains decreasing current；
The third output module 4010, for the decreasing current to be conveyed to the neutral section；
The third computing module 4011, for the decreasing current to be conveyed to institute in the third output module 4010
After stating neutral section, the current phase difference between the voltage-phase of first supply arm and current phase is calculated, is treated as second
Judge phase difference；
Second judgment module 4012, for by the described second phase difference to be judged and the described first phase difference to be judged
It is compared, judges whether the described second phase difference to be judged overturns；
4th output module 4013, for judging the described second phase to be judged in second judgment module 4012
When difference is overturn, using the electric current to be output as the output current determined, it is transported to the neutral section.
In the detection method of power train electric current disclosed by the embodiments of the present invention, difference module 409 is done first by second
After overturning has occurred in phase difference to be judged, currently obtained electric current to be output is made the difference with the second predetermined current, and
After obtained decreasing current is conveyed to neutral section by third output module 4010, is calculated again by third computing module 4011
Current phase difference between the voltage-phase and current phase of one supply arm as the second phase difference to be judged, is sentenced so as to second
Second phase difference to be judged and the first phase difference to be judged are compared by disconnected module 4012, if judging the second phase to be judged
Difference is overturn, just by the 4th output module 4013 using currently obtained electric current to be output as the output electricity determined
Stream, and neutral section is conveyed to, it is powered to enter in neutral section in power train for it, and then effectively prevent because of electric power
There is a situation where overturn for phase difference caused by other factors in transition region for train so that the detection of power train electric current
It is more accurate.
The course of work of modules provided in an embodiment of the present invention please refers to the method flow diagram corresponding to attached drawing 3, tool
Body running process repeats no more.
The foregoing description of the disclosed embodiments enables professional and technical personnel in the field to realize or use the present invention.
A variety of modifications of these embodiments will be apparent for those skilled in the art, it is as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention
The embodiments shown herein is not intended to be limited to, and is to fit to and the principles and novel features disclosed herein phase one
The most wide range caused.
Claims (8)
1. a kind of detection method of power train electric current, which is characterized in that applied to flexible automatic neutral-section passing device, including：
In the incoming telephone signal for receiving the transmission of the first current transformer, the voltage-phase and current phase of the first supply arm are calculated
Between initial phase difference, wherein, first supply arm be the power train before power train enters electric split-phase into
Row power supply, first current transformer are arranged on the first supply arm end；
The first electric current is controlled to be added with the first predetermined current, obtains an increasing current, and using the increasing current as institute
The electric current to be output of flexible automatic neutral-section passing device is stated, wherein, first electric current exists for the flexible automatic neutral-section passing device
The power train enters the electric current being powered in transition region for the power train；
By the current transmission to be output to neutral section, power for the power train；
The current phase difference between the voltage-phase of first supply arm and current phase is calculated, as the first phase to be judged
Difference；
Described first phase difference to be judged with the initial phase difference is compared, judges that the described first phase difference to be judged is
It is no to overturn；
If first phase difference to be judged is not overturn, using the electric current to be output as the first electric current, and described in return
The first electric current is controlled to be added with the first predetermined current, obtains an increasing current, and using the increasing current as described soft
The electric current to be output of property automatic neutral-section passing device；
If first phase difference to be judged is overturn, using the electric current to be output as the output current determined, conveying
To the neutral section.
2. according to the method described in claim 1, it is characterized in that, the calculating voltage-phase of the first supply arm and electric current phase
Initial phase difference between position, including：
The voltage-phase for first supply arm that receiving voltage mutual inductor is sent；
Receive the current phase for first supply arm that first current transformer is sent；
The voltage-phase of first supply arm and the current phase of first supply arm are made the difference, are calculated described first
Initial phase difference between the voltage-phase and current phase of supply arm.
3. according to the method described in claim 1, it is characterized in that, after the described first phase difference to be judged is overturn,
It further includes：
The electric current to be output with the second predetermined current is made the difference, obtains decreasing current；
The decreasing current is transported to the neutral section；
The current phase difference between the voltage-phase of first supply arm and current phase is calculated, as the second phase to be judged
Difference；
Described second phase difference to be judged and the described first phase difference to be judged are compared, judge the described second phase to be judged
Whether potential difference overturns；
If second phase difference to be judged is overturn, using the electric current to be output as the output current determined, conveying
To the neutral section.
4. according to the method described in claim 1, it is characterized in that, described that the electric current to be output is defeated as what is determined
Go out electric current, be transported to after the neutral section, further include：
In the incoming telephone signal for receiving the transmission of the second current transformer, the output current is controlled according to the described first default electricity
Stream successively decreases, until the output current is zero, wherein, second current transformer is arranged on the second supply arm front end,
Second supply arm is that the power train is powered after the power train is driven out to electric split-phase.
5. a kind of detection device of power train electric current, which is characterized in that including：
First computing module, in the incoming telephone signal for receiving the transmission of the first current transformer, calculating the first supply arm
Initial phase difference between voltage-phase and current phase, wherein, first supply arm power train enter electric split-phase it
Preceding to be powered for the power train, first current transformer is arranged on the first supply arm end；
Summation module for the first electric current to be controlled to be added with the first predetermined current, obtains an increasing current, and pass described
Increase to be output electric current of the electric current as the flexible automatic neutral-section passing device, wherein, first electric current is described flexible automatic
It is electric current that the power train is powered that passing phase insulator device, which enters in the power train in transition region,；
First output module, for the current transmission to be output to neutral section, to be powered for the power train；
Second computing module after in first output module by the current transmission to be output to neutral section, calculates institute
The current phase difference between the voltage-phase of the first supply arm and current phase is stated, as the first phase difference to be judged；
First judgment module, for the described first phase difference to be judged to be compared with the initial phase difference, described in judgement
Whether the first phase difference to be judged overturns；
Update module, for judging described first when judging that phase difference is not overturn in first judgment module, by institute
Electric current to be output is stated as the first electric current；
Correspondingly, the summation module, be additionally operable to the update module using the electric current to be output as the first electric current after, control
It makes the first electric current to be added with the first predetermined current, obtains an increasing current, and using the increasing current as the flexibility
The electric current to be output of automatic neutral-section passing device；
Second output module, will for judging described first when judging that phase difference is overturn in first judgment module
The electric current to be output is transported to the neutral section as the output current determined.
6. device according to claim 5, which is characterized in that first computing module includes：
First phase receiving module, for the voltage-phase for first supply arm that receiving voltage mutual inductor is sent；
Second phase receiving module, for receiving the electric current phase for first supply arm that first current transformer is sent
Position；
First does difference module, for the voltage-phase of first supply arm and the current phase of first supply arm to be done
The initial phase difference between the voltage-phase of first supply arm and current phase is calculated in difference.
7. device according to claim 5, which is characterized in that judge that described first waits to judge in first judgment module
After phase difference is overturn, further include：
Second does difference module, for the electric current to be output and second predetermined current to be made the difference, obtains decreasing current；
Third output module, for the decreasing current to be conveyed to the neutral section；
Third computing module, for after the decreasing current is transported to the neutral section by the third output module, calculating
Current phase difference between the voltage-phase and current phase of first supply arm, as the second phase difference to be judged；
Second judgment module for the described second phase difference to be judged and the described first phase difference to be judged to be compared, is sentenced
Whether second phase difference to be judged that breaks overturns；
4th output module, will for judging described second when judging that phase difference is overturn in second judgment module
The electric current to be output is transported to the neutral section as the output current determined.
8. device according to claim 5, which is characterized in that make the electric current to be output in second output module
For the output current determined, it is transported to after the neutral section, further includes：
Successively decrease module, in the incoming telephone signal for receiving the transmission of the second current transformer, control the output current according to
First predetermined current is successively decreased, until the output current is zero, wherein, second current transformer is arranged on
Two supply arm front ends, second supply arm are that the power train is supplied after the power train is driven out to electric split-phase
Electricity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611260022.7A CN108263248B (en) | 2016-12-30 | 2016-12-30 | Method and device for detecting current of electric power train |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611260022.7A CN108263248B (en) | 2016-12-30 | 2016-12-30 | Method and device for detecting current of electric power train |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108263248A true CN108263248A (en) | 2018-07-10 |
| CN108263248B CN108263248B (en) | 2020-04-21 |
Family
ID=62753678
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611260022.7A Active CN108263248B (en) | 2016-12-30 | 2016-12-30 | Method and device for detecting current of electric power train |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108263248B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103754135A (en) * | 2014-01-20 | 2014-04-30 | 唐山轨道客车有限责任公司 | Excessive phase control method and vehicle equipment |
| CN103863141A (en) * | 2014-01-26 | 2014-06-18 | 西南交通大学 | Control method based on cascade multilevel ground electrical phase-splitting device |
| CN105015366A (en) * | 2015-07-16 | 2015-11-04 | 西南交通大学 | Phase switching method for rapidly adjusting phase of reference voltage of inverter |
| CN105922894A (en) * | 2016-04-22 | 2016-09-07 | 中国船舶重工集团公司第七〇二研究所 | Passing neutral section system based on high-power converter device, and control method thereof |
-
2016
- 2016-12-30 CN CN201611260022.7A patent/CN108263248B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103754135A (en) * | 2014-01-20 | 2014-04-30 | 唐山轨道客车有限责任公司 | Excessive phase control method and vehicle equipment |
| CN103863141A (en) * | 2014-01-26 | 2014-06-18 | 西南交通大学 | Control method based on cascade multilevel ground electrical phase-splitting device |
| CN105015366A (en) * | 2015-07-16 | 2015-11-04 | 西南交通大学 | Phase switching method for rapidly adjusting phase of reference voltage of inverter |
| CN105922894A (en) * | 2016-04-22 | 2016-09-07 | 中国船舶重工集团公司第七〇二研究所 | Passing neutral section system based on high-power converter device, and control method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108263248B (en) | 2020-04-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109823187B (en) | Electric braking energy feedback system | |
| CN201594757U (en) | Vehicular charging device | |
| CA2792870C (en) | Electronic control unit | |
| CN112636694B (en) | Photovoltaic power generation system and method | |
| CN206569857U (en) | A kind of elevator drive | |
| CN106004489A (en) | Automobile-mounted charger for electric automobile, charging method and electric automobile | |
| KR101664745B1 (en) | Method for detecting fusion of relay of battery | |
| CN106994900B (en) | Vehicle-mounted bidirectional charger, vehicle-mounted bidirectional power supply method and device | |
| CN103217602B (en) | Testing device and testing method of train power supply system | |
| KR20190121730A (en) | Charge controller for a battery in a vehicle | |
| CN105691244B (en) | A kind of system zero load monitoring method of electric railway insertion power supply | |
| US9321360B2 (en) | Electronic control unit | |
| CN205453147U (en) | Three -phase unbalanced load adjusting device | |
| CN209305600U (en) | The start-up and shut-down control device of logistics trolley | |
| CN103204081B (en) | Motor control system and method for electric cars | |
| CN108263248A (en) | A kind of detection method and device of power train electric current | |
| CN107294067A (en) | Guard method, device and the electric automobile of inverter | |
| CN109066737A (en) | A kind of negative sequence compensation devices and methods therefor of traction-compensator transformer | |
| CN105186845A (en) | Circuit and method for controlling IPM (intelligent power module) | |
| CN110797848B (en) | Line longitudinal differential protection method suitable for three-terminal conventional direct-current power transmission system | |
| CN205311365U (en) | Device is recycled to undue looks energy of train | |
| CN201665453U (en) | Elevator controller | |
| CN108258661B (en) | HVDC transmission system jumps into isolated island mode bipolar locking method and device | |
| CN108068640A (en) | A kind of double source trolleybus method for controlling power supply and device | |
| CN109188173A (en) | Ground detecting system and rail vehicle for rail vehicle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |