CN107215246A - Contact net intelligence ice melting system - Google Patents
Contact net intelligence ice melting system Download PDFInfo
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- CN107215246A CN107215246A CN201710365417.1A CN201710365417A CN107215246A CN 107215246 A CN107215246 A CN 107215246A CN 201710365417 A CN201710365417 A CN 201710365417A CN 107215246 A CN107215246 A CN 107215246A
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- ice
- control signal
- melt
- contact net
- converter plant
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
- B60M1/00—Power supply lines for contact with collector on vehicle
- B60M1/12—Trolley lines; Accessories therefor
- B60M1/28—Manufacturing or repairing trolley lines
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G7/00—Overhead installations of electric lines or cables
- H02G7/16—Devices for removing snow or ice from lines or cables
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention provides a kind of intelligent ice melting system of contact net, including ice-melt control device and N number of converter plant；One end connection direct current contact net of the converter plant, other end connection AC network；The converter plant, for entering rectification operating mode according to the first control signal；Inversion operating mode is entered according to the second control signal；The ice-melt control device, for obtaining first control signal and second control signal, and to treating that the corresponding converter plant of ice-melt section sends first control signal and second control signal；Wherein, first control signal includes ice melting current value with second control signal；To be formed energy circulation between the converter plant in rectification operating mode, the respective segments for treating ice-melt section, the converter plant in inversion operating mode and AC network of direct current contact net, and the electric current for treating ice-melt section of the direct current contact net is not less than the ice melting current value.
Description
Technical field
The present invention relates to urban track traffic traction power supply field, more particularly to a kind of intelligent ice melting system of contact net.
Background technology
Contact net is the important component of urban track traffic tractive power supply system, and it is along rail overhung
The transmission line of electricity of electric energy is provided for train.Contact net icing refers to water droplet to run into after cold air to condense in contact line, causes big
The phenomenon that contact area line is encased by ice.
At present, urban rail transit contact network de-icing method mainly has artificial deicing method, the sliding method of contact net heat and heating power
Ice-melting method.Wherein, artificial deicing method time and effort consuming, deicing efficiency is low, and with certain danger.The sliding method docking of contact net heat
Net-fault has certain infringement, and can not fully erased icing.The operation principle of thermal ice-melting method is：Apply electric current to contact net, make
Its own heating is melted in icing, existing correlation technique, adjustable by the special DC for increasing a set of Large Copacity in electric substation
Power supply (IGCT control pressure regulation), and it is in distal end somewhere that contact net is short-circuit to rail, ice melting current is formed, and then pass through ice-melt
The heat that electric current is produced reaches the purpose of ice-melt.
However, in the equipment of existing thermal ice-melting method, high-capacity direct current regulated power supply is controlled based on IGCT, alternating current
Flow harmonic content big, harmonic pollution can be caused to AC network, and the equipment can only be used as ice-melt, and function is single, utilization rate
Low, cost performance is poor.
The content of the invention
The invention provides a kind of intelligent ice melting system of urban rail transit contact network, to solve high-capacity direct current adjustable electric
The problems such as harmonic pollution is caused in source to AC network.
According to the first aspect of the invention there is provided a kind of intelligent ice melting system of contact net, including ice-melt control device with
And N number of converter plant, the N is the arbitrary integer more than or equal to 2；
One end connection direct current contact net of the converter plant, other end connection AC network；
The converter plant, for entering rectification operating mode according to the first control signal；Enter inverse according to the second control signal
Variable working condition；
The ice-melt control device, for obtaining first control signal and second control signal, and to waiting to melt
Section corresponding converter plant in ice formation sends first control signal and the second control signal；Wherein, first control signal
Include ice melting current value with the second control signal；
With cause it is described treat in the corresponding converter plant of ice-melt section, one of them is in rectification operating mode, and another is in
Inversion operating mode；Converter plant in rectification operating mode, direct current contact net treat ice-melt section, the converter plant in inversion operating mode
And energy circulation is formed between the respective segments of AC network, and the electric current for treating ice-melt section of the direct current contact net is not small
In the ice melting current value.
Optionally, the converter plant is additionally operable to, according to the 3rd control signal, into reactive-load compensation operating mode.
Optionally, described system also includes：
Sensor network, the monitoring information for obtaining the direct current contact net；
The ice-melt control device, specifically for obtaining first control signal and the second control according to the monitoring information
Signal processed.
Optionally, the ice melting current value is to be obtained according to the monitoring information.
Optionally, the monitoring information includes：
The first information of the direct current contact net local environment, and：
The direct current contacts the second information of net image.
Optionally, the ice-melt control device is additionally operable to, according to second information, obtain ice covering thickness；And according to described
Ice covering thickness and the first information, which are calculated, obtains the ice melting current value.
Optionally, the ice-melt control device specifically for：According to the first information, ice covering thickness, described straight
The parameter preset of contact net and the meteorological data of pre-input are flowed, calculating obtains the ice melting current value.
Optionally, the first information includes at least one of：
Temperature；
Humidity；
Wind speed.
Optionally, the converter plant includes transformer and pulse width modulation (PWM) current transformer；
The transformer, for the voltage transformation between the AC network and PWM converter AC.；
The PWM converter, is used for：
Receive first control signal or the second control signal；
According to first control signal, into rectification working condition；
According to second control signal, into inversion working condition；
According to the ice melting current value, the electric energy of output is adjusted, to cause the electric current for treating ice-melt section reaches described
Ice melting current value.
Optionally, the PWM converter includes control circuit and some device for power switching；
The control circuit, for according to the ice melting current value, producing driving pulse；
Some device for power switching, for responding the driving pulse, perform on or off action, so as to adjust
Export size and/or the direction of electric energy.
Optionally, the converter plant also include first switch, low-voltage circuit breaker, preliminary filling electrical circuit, second switch and every
Leave pass；The high-pressure side of the transformer is connected to the AC network, the low pressure of the transformer by the first switch
Side is connected to the AC of the PWM converter by the low-voltage circuit breaker, and the positive pole of the PWM converter DC side passes through
The second switch is connected to the direct current contact net；The negative pole of the PWM converter DC side keeps apart connection by described
It is connected to rail；The preliminary filling electrical circuit is parallel to the two ends of the low-voltage circuit breaker；
The first switch, low-voltage circuit breaker, second switch and disconnecting switch, are used to response first control signal
Or second control signal, perform closed action.
In the intelligent ice melting system of contact net that the present invention is provided, one end connection direct current contact net of the converter plant, separately
One end connects AC network；The converter plant is used for：Rectification operating mode is entered according to the first control signal；Believed according to the second control
Number enter inversion operating mode；It forms path between AC network and direct current contact net, it is achieved thereby that ice-melt, because it is not used
High-capacity direct current regulated power supply, and converter plant is employed as the power supply of ice-melt, reduce the harmonic pollution to AC network.
And in optional embodiment of the invention, when without ice-melt demand, converter plant can be operated in rectification, inversion as needed
And reactive-load compensation pattern, so as to improve contact net power supply quality, realize that train regenerating braking energy is recycled, improve system power
Factor, realizes a tractor serves several purposes.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also
To obtain other accompanying drawings according to these accompanying drawings；
Fig. 1 is the organigram of tractive power supply system in existing correlation technique；
Fig. 2 is the organigram of the intelligent ice melting system of a contact net in the present invention；
Fig. 3 is the control schematic diagram of the intelligent ice melting system of a contact net in the present invention；
Fig. 4 is the organigram of a converter plant in the present invention；
Fig. 5 is the schematic flow sheet of a deicing processes in the present invention.
Description of reference numerals：
1- main transformer stations；
2- electric substations；
3- Rectification Power Factors；
4- rail；
5- trains；
6- AC networks；
7- direct current contact nets；
8- converter plants；
81- first switches；82- transformers；83- low-voltage circuit breakers；84- preliminary filling electrical circuits；85-PWM current transformers；86-
Two switches；87- disconnecting switch；
9- energy circulations；
10- treats ice-melt section；
11- ice-melt control devices；
12- sensor networks.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Term " first ", " second ", " the 3rd " " in description and claims of this specification and above-mentioned accompanying drawing
The (if present)s such as four " are for distinguishing similar object, without for describing specific order or precedence.It should manage
The data that solution is so used can be exchanged in the appropriate case, so as to embodiments of the invention described herein for example can with except
Order beyond those for illustrating or describing herein is implemented.In addition, term " comprising " and " having " and theirs is any
Deformation, it is intended that covering is non-exclusive to be included, for example, containing the process of series of steps or unit, method, system, production
Product or equipment are not necessarily limited to those steps clearly listed or unit, but may include not list clearly or for this
A little processes, method, product or the intrinsic other steps of equipment or unit.
Technical scheme is described in detail with specifically embodiment below.These specific implementations below
Example can be combined with each other, and may be repeated no more for same or analogous concept or process in some embodiments.
Fig. 1 is the organigram of tractive power supply system in existing correlation technique；Traction power supply in existing correlation technique
System can include in main transformer station 1, electric substation 2, AC network 6 and direct current contact net 7, one of which scheme, 110KV electricity
35KV is depressurized to through the main transformer station 1, and then is respectively sent to through AC network 6 in each electric substation 2, electric substation 2 provided with whole
Unit 3 is flowed, under power supply state, the Rectification Power Factor 3 after direct current by AC rectification for being sent to direct current contact net
7, the train 5 on rail 4 passes through direct current contact net 7 and obtains direct current.On this basis, in existing correlation technique, by
Electric substation 2 increases the special DC regulated power supply (IGCT control pressure regulation) of a set of Large Copacity, and connects direct current in distal end somewhere
7 pairs of rail 4 of touching net are short-circuit, ice melting current formed, so as to carry out ice-melt.
Wherein, Rectification Power Factor 3 can use 24 Pulses Rectifiers, and its effect is to be transformed to 35kV three-phase alternating currents
1500V or 750V direct currents, and be transported on direct current contact net 7 and used for train 5.
Fig. 2 is the organigram of the intelligent ice melting system of a contact net in the present invention；Fig. 2 is refer to, and combines Fig. 1 reasons
Solution, present embodiments provides a kind of intelligent ice melting system of contact net, including ice-melt control device 11 and N number of converter plant 8, institute
It is the arbitrary integer more than or equal to 2 to state N；
One end connection direct current contact net 7 of the converter plant 8, other end connection AC network 6；Embodiment
In, direct current contact net 7 can be connected to by switching device；
The converter plant 8, for entering rectification operating mode according to the first control signal；Enter inverse according to the second control signal
Variable working condition；
The ice-melt control device 11, for obtaining first control signal and second control signal, and to treating
The corresponding converter plant 8 of ice-melt section 10 sends first control signal and the second control signal；Wherein, first control
Signal and the second control signal include ice melting current value；
With cause it is described treat in the corresponding converter plant 8 of ice-melt section 10, one of them is in rectification operating mode, at another
In inversion operating mode；Converter plant 8 in rectification operating mode, the converter plant 8 in inversion operating mode, direct current contact net 7 wait melt
Energy circulation 9 is formed between ice formation section 10 and the respective segments of AC network 6, and the direct current contact net 7 treats ice-melt area
The electric current of section 10 is not less than the ice melting current value.Electric current reaches ice melting current value, can produce joule's heat energy, reaches ice-melt mesh
's.
The program forms path between AC network 6 and direct current contact net 7, it is achieved thereby that ice-melt, because it is not used
High-capacity direct current regulated power supply, and converter plant 8 is employed as the power supply of ice-melt, reduce dirty to the harmonic wave of AC network 6
Dye.
Wherein, ice-melt section 10 is treated, it will be appreciated that be the section being melted with icing needs., can be with for the section
It is interpreted as：The two ends of each section are connected respectively can be divided into one between a converter plant 8, adjacent converter plant 8
Section, is separated by between two converter plants 8 of one or more converter plants 8, can also be divided into a section, stroke of section
Divide and be intended to treat ice-melt section 10 described in determination.In all sections, the section for needing to be melted with icing can be regarded as treating
Ice-melt section 10, the position of icing can simply treat the part in ice-melt section 10, or all.Wherein, ice-melt area is treated
10 corresponding converter plants 8 of section, refer to treating the converter plant 8 that the two ends of ice-melt section 10 are connected；The corresponding area of AC network 6
Section refers to treating the section of the AC network 6 between the converter plant 8 that the two ends of ice-melt section 10 are connected.
Wherein, first control signal can be understood as driving the signal into rectification operating mode；Second control letter
It number can be understood as being driven into the signal of inversion operating mode；Which includes ice melting current value, when can also include ice-melt
Between.It can also include including referring in the information for indicating to enter rectification operating mode, the second control signal in first control signal
Show the information into inversion operating mode.
Energy circulation 9 is formed, refers to that electric current can be treated in converter plant 8 in rectification operating mode, direct current contact net 7
Between the respective segments of ice-melt section 10, the converter plant 8 in inversion operating mode and AC network 6 circulate circulation, its be
Under operation principle under ice-melt state, rather than the power supply state.
Wherein, the communication network between ice-melt control device 11 and converter plant 8 uses PSCADA networks, realizes that data are passed
The functions such as defeated, equipment control.
Fig. 3 is the control schematic diagram of the intelligent ice melting system of a contact net in the present invention；Fig. 5 is a deicing processes in the present invention
Schematic flow sheet；Fig. 3 is refer to, and is combined in Fig. 5, the present embodiment, described system also includes：
Sensor network 12, the monitoring information for obtaining the direct current contact net 7；Wherein, alleged monitoring information can be with
Refer to any information for monitoring acquisition for direct current contact net 7；It is different based on purpose, corresponding monitoring information can be selected.
Function above, it is corresponding to can be understood as the deicing processes including step S51：Sensor network 12 obtains described
The monitoring information of direct current contact net 7；
In specific embodiment, sensor network 12 can use wireless multimedia sensor, can include multigroup tool
There are the sensor node of calculating, storage and communication capacity, the distributed sensing network of sensor node composition, by means of node
On sensor sense to obtain the information such as the temperature of contact net surrounding environment, humidity, wind speed and contact net image, pass through wireless mould
Block upload the data to ice-melt control device 11；It can realize the effectively and rapidly collection and management of sensing data.
The ice-melt control device 11, specifically for obtaining first control signal and second according to the monitoring information
Control signal.Wherein, the ice melting current value is to be obtained according to the monitoring information.In addition, ice-melt control device 11 is additionally operable to
Judge contact net ice coating state, can specifically comprise determining whether that the state of icing (can be understood as judging whether that position needs to melt
The state of ice), and for determining that treats ice-melt section 10 treats ice-melt section information.If being judged as needing ice-melt, and determine
Ice-melt section 10 is treated, then calculates corresponding ice melting current value.
The control of ice-melt is associated by the program with the monitoring of sensor network 12, it is possible to achieve automatic ice-melt control,
The scheme operated compared to manpower intervention of the prior art, it can effectively improve intelligence degree, and selection is more accurately melted
On ice opportunity, more accurate quantified controlling is realized, and then improve ice-melt efficiency, save energy consumption.
In one of which embodiment, the monitoring information includes：
The first information of the local environment of direct current contact net 7, and：
Second information of the image of direct current contact net 7.
Can be the calculating of ice melting current value to whether the degree of icing and icing understands by the second information,
And whether need the judgement of ice-melt to provide foundation；By the first information, can cause follow-up calculating consider environment because
Element, so as to calculate the ice melting current value under the more accurately corresponding ice-melt time.The first information can be enumerated including following
At least one：Temperature；Humidity；Wind speed.
In one of which embodiment, the ice-melt control device 11 is additionally operable to, according to second information, obtain icing
Thickness；And the ice melting current value is obtained according to the ice covering thickness and first information calculating.Again in its specific scheme,
The ice-melt control device 11 specifically for：According to the first information, the ice covering thickness, the direct current contact net 7 it is pre-
The meteorological data of setting parameter and pre-input, calculating obtains the ice melting current value.Alleged parameter preset can refer to the electricity of correlation
Gas parameter；In one of which embodiment, while ice melting current value is obtained, the ice-melt time also can obtain, it can be understood as
First control signal in the second control signal with also including the ice-melt time.
In a kind of wherein specific embodiment, ice-melt control device 11 covers specifically for extracting contact net in the second information
The boundary profile of ice atlas picture, calculates diameter letter when diameter information (shared pixel count) and the non-icing after icing in picture
Cease (shared pixel count), using the ratio between difference and diameter pixel value and actual size of shared pixel before and after icing, calculate contact
The ice covering thickness of line and carrier cable.By temperature, wind speed, ice covering thickness, wire radius, contact line resistance, carrier cable resistance, ice-melt
The relevant parameters such as expeced time bring default calculation formula into, can draw the ice melting current value of contact net correspondence ice-melt time.
Wherein, meteorological data can be obtained from internet；Related electric parameter, the direct current of such as contact line and carrier cable
Resistance etc., can be obtained for user by input unit input.
Function above, it is corresponding to can be understood as the deicing processes and include：
S52：Ice-melt control device 11 receives the monitoring information that sensor network 12 is sent；
S53：Ice-melt control device judges whether to need ice-melt；If need not, return to step S51；If desired, then perform
Step S54；
S54：Ice-melt control device 11 calculates the ice melting current value under the corresponding ice-melt time；
S55；Ice-melt control device 11 obtains first control signal and second control signal；
Then, 10 corresponding two converter plants 8 of ice-melt section are treated, step S56 and S57 is respectively enterd.
S56：One of converter plant 8 receives first control signal, into rectification operating mode；
S57：Another converter plant 8 receives second control signal, into inversion operating mode.
In order to realize in the function of above-mentioned ice-melt control device 11, one of which embodiment, ice-melt control dress
Monitoring modular, computing module and control module can specifically be included by putting 11：
The monitoring modular, for receiving the monitoring information that the sensor network 12 is sent, and judges that the direct current connects
The contact net ice coating state of net-fault 7；When the contact net ice coating state is the state for needing ice-melt, sent out to the computing module
Ice-melt is sent to instruct and the monitoring information；The ice-melt instruction can include the information for treating ice-melt section 10；
The computing module, for responding the ice-melt instruction, waits to melt according to monitoring information calculating is corresponding
Ice melting current value under the 10 corresponding ice-melt times of section of ice formation, and during to the control module transmission ice melting current value and ice-melt
Between；
The control module, for receiving the ice melting current value and ice-melt time, becomes to treating that ice-melt section 10 is corresponding
Stream device 8 sends first control signal or second control signal.
In addition, the system can also include：
Mixed-media network modules mixed-media, for obtaining the meteorological data from internet, and sends to the computing module；
Setup module, for receiving the electric parameter that user's input is obtained, and sends to the computing module；
Display module：Working condition for showing real-time weather condition, the information of collection and ice melting system etc.；
Data module：For carrying out data analysis, storage and handling, user can manage data as needed.
Above monitoring modular, computing module and control module, can be to be recorded in memory, for by processor call with
Realize the program module of corresponding function, or the circuit module for realizing corresponding function.
In one of which embodiment, the converter plant 8 is except that with inversion operating mode, rectification operating mode, can also possess
In reactive-load compensation operating mode, the embodiment, the converter plant 8 is additionally operable to, according to the 3rd control signal, into reactive-load compensation work
Condition.3rd control signal, it can be understood as be intended to change the operating mode of converter plant 8, make it into the signal of reactive-load compensation operating mode.It is logical
Reactive-load compensation operating mode is crossed, reactive-load compensation can be carried out to exchange looped network, so as to realize a tractor serves several purposes, improve the profit of converter plant 8
With rate.
For alleged rectification operating mode, inversion operating mode and reactive-load compensation operating mode, it can be understood as, it is converter plant 8
The circuit of itself, corresponding to different operating modes, the achievable different working condition of PWM converter 85 therein, such as rectification work
Condition corresponds to rectification working condition, and inversion operating mode, corresponding to inversion working condition, by the control to wherein switching device, is divided
The effect of different operating modes can not realized, its without departing from existing correlation technique for the usual of converter plant 8 or current transformer
The description of function.
For reactive-load compensation operating mode therein, in one embodiment, it can be understood as, utilize the nothing of converter plant 8
Work(power generating function is realized in the reactive-load compensation to AC network 6, specific implementation process, it can be understood as converter plant 8 zero
(being equivalent to amplitude can for the pure perception operation (being equivalent to the adjustable inductance of bat value) of power factor or the pure operation at leading power factor of zero power factor
The electric capacity of tune), to compensate the influence of capacitive load or inductive load to the power factor of AC network 6.It can write in the controller
Enter the control logic of reactive power compensation to determine, or determine according to default quantized data.
In addition, converter plant 8 can be also used for the regenerative braking energy feedback of train 5 to exchange medium voltage network, can also
Auxiliary rectifier unit 3 carries out traction rectifier and powered, and it is actual also to be understood as realizing inversion and rectification function respectively, but work
Power output it is different with control logic.It can further realize a tractor serves several purposes, improve the utilization rate of converter plant 8.
It can be seen that, when without ice-melt demand, converter plant 8 can be operated in rectification, inversion and reactive-load compensation pattern as needed,
So as to improve contact net power supply quality, realize that the regenerating braking energy of train 5 is recycled, improve system power factor, realize one
Machine is used.
Fig. 4 is the organigram of a converter plant 8 in the present invention；Fig. 4 is refer to, the converter plant 8 can include
Transformer 82 and pulse width modulation (PWM) current transformer 85；
The transformer 82, for carrying out the voltage transformation between the AC network 6 and the AC of PWM converter 85；
The PWM converter 85, is used for：
Receive first control signal or the second control signal；
According to first control signal, into rectification working condition；
According to second control signal, into inversion working condition；
According to the ice melting current value, the electric energy of output is adjusted, described to treat that the electric current of ice-melt section 10 reaches institute
State ice melting current value.
In one of which embodiment, the PWM converter 85 includes control circuit and some device for power switching；
The control circuit, for according to the ice melting current value, producing driving pulse；
Some device for power switching, for responding the driving pulse, perform on or off action, so as to adjust
Export size and/or the direction of electric energy.PWM converter 85 in field typically each includes device for power switching, is opened by power
The adjustment of output electric energy can be realized by closing the break-make of device.
Converter plant 8 can use four-quadrant converter plant, can specifically use three-phase PWM current transformer, and it is based on pulse
Width modulation technology, using the closed-loop current control based on synchronous rotating frame, can be achieved four quadrant running, is separately operable
The operating modes such as rectification, inversion and reactive-load compensation.
Device for power switching in PWM converter 85 can use full-control type power device, such as IGBT.First is not being received
When control signal and the second control signal, four-quadrant converter plant is in and exits state, and all switches and breaker are in point
Disconnected state, IGBT driving pulses are in blocked styate.Receive after the first control signal or the second control signal, four-quadrant unsteady flow dress
Put and put into operation, all switches and breaker closing, and according to ice melting current set-point size, using PWM pulse modulation technologies
Driving pulse is produced, driving IGBT work controls the size and Orientation of four-quadrant converter plant transmission energy.
It refer in Fig. 4, one of which embodiment, the converter plant 8 also includes first switch 81, low-voltage circuit breaker
83rd, preliminary filling electrical circuit 84, second switch 86 and disconnecting switch 87；The high-pressure side of the transformer 82 passes through the first switch 81
The AC network 6 is connected to, the low-pressure side of the transformer 82 is connected to the PWM unsteady flows by the low-voltage circuit breaker 83
The AC of device 85, the positive pole of the DC side of PWM converter 85 is connected to the direct current by the second switch 86 and contacted
Net 7；The negative pole of the DC side of PWM converter 85 is connected to rail 4 by disconnecting switch 87；The preliminary filling electrical circuit 84 is in parallel
In the two ends of the low-voltage circuit breaker 83；The first switch 81, low-voltage circuit breaker 83, second switch 86 and disconnecting switch 87,
Response first control signal or the second control signal are used to, closed action is performed.It is to be understood that receiving the first control
During signal processed, closed action is performed both by, when performing the second control signal, closed action is also performed both by, rather than alternatively performs,
First control signal or the second control signal alleged by above, it is intended to express, while a kind of control signal can only be responded.
In specifically used scene, when urban track traffic is runed in the daytime, train 5 is run frequently, therefore contact net covers
The probability very little of ice.After vehicle at night is stopped transport, there is no electric current on contact net, when meteorological condition is severe (such as：Temperature is less than 0 degree, sky
Gas phase is more than 80% to humidity, and wind speed is more than 1 meter per second) easily occur icing.Once come in contact net icing disaster, ice-melt control
System processed will make a response, and in the morning melt contact net icing before the first train online operation.It is no more than in ice melting current
In the case of rated current, ice melting current is bigger, and the required ice-melt time is shorter, and efficiency is higher.
In addition, the method shown in the present embodiment, accordingly available for the technical scheme for implementing Fig. 2 shown device embodiments,
The implication of its realization principle, technique effect and term is similar, and here is omitted.
One of ordinary skill in the art will appreciate that：Realizing all or part of step of above-mentioned each method embodiment can lead to
The related hardware of programmed instruction is crossed to complete.Foregoing program can be stored in a computer read/write memory medium.The journey
Sequence upon execution, performs the step of including above-mentioned each method embodiment；And foregoing storage medium includes：ROM, RAM, magnetic disc or
Person's CD etc. is various can be with the medium of store program codes.
Finally it should be noted that：Various embodiments above is merely to illustrate technical scheme, rather than its limitations；To the greatest extent
The present invention is described in detail with reference to foregoing embodiments for pipe, it will be understood by those within the art that：Its according to
The technical scheme described in foregoing embodiments can so be modified, or which part or all technical characteristic are entered
Row equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology
The scope of scheme.
Claims (10)
1. the intelligent ice melting system of a kind of contact net, it is characterised in that including ice-melt control device and N number of converter plant, the N
For the arbitrary integer more than or equal to 2；
One end connection direct current contact net of the converter plant, other end connection AC network；
The converter plant, for entering rectification operating mode according to the first control signal；Inversion work is entered according to the second control signal
Condition；
The ice-melt control device, for obtaining first control signal and second control signal, and to treating ice-melt area
The corresponding converter plant of section sends first control signal and second control signal；Wherein, first control signal
Include ice melting current value with second control signal；
With cause it is described treat that one of them in the corresponding converter plant of ice-melt section is in rectification operating mode, another is in inversion work
Condition；Converter plant in rectification operating mode, direct current contact net treat ice-melt section, the converter plant in inversion operating mode and friendship
Form energy circulation between the respective segments for flowing power network, and the direct current contact net the electric current for treating ice-melt section not less than described
Ice melting current value.
2. system according to claim 1, it is characterised in that the converter plant is additionally operable to, according to the 3rd control signal,
Into reactive-load compensation operating mode.
3. system according to claim 1 or 2, it is characterised in that also include：
Sensor network, the monitoring information for obtaining the direct current contact net；
The ice-melt control device, specifically for obtaining first control signal and the described second control according to the monitoring information
Signal processed.
4. system according to claim 3, it is characterised in that the monitoring information includes：
The first information of the direct current contact net local environment, and：
The direct current contacts the second information of net image.
5. system according to claim 4, it is characterised in that the ice-melt control device is additionally operable to according to the described second letter
Breath, obtains ice covering thickness；And the ice melting current value is obtained according to the ice covering thickness and first information calculating.
6. system according to claim 5, it is characterised in that the ice-melt control device specifically for：According to described
One information, the ice covering thickness, the meteorological data of the parameter preset of the direct current contact net and pre-input, calculating obtains described
Ice melting current value.
7. system according to claim 4, it is characterised in that the first information includes at least one of：
Temperature；
Humidity；
Wind speed.
8. system according to claim 1 or 2, it is characterised in that the converter plant includes transformer and pulse width
Modulation (PWM) current transformer；
The transformer, for carrying out the voltage transformation between the AC network and PWM converter AC；
The PWM converter, for receiving first control signal or the second control signal；Believed according to the described first control
Number, into rectification working condition；According to second control signal, into inversion working condition；
According to the ice melting current value, the electric energy of output is adjusted, described to treat that the electric current of ice-melt section reaches the ice-melt
Current value.
9. system according to claim 8, it is characterised in that the PWM converter includes control circuit and some power
Switching device；
The control circuit, for according to the ice melting current value, producing driving pulse；
Some device for power switching, for responding the driving pulse, perform on or off action, so as to adjust output
The size of electric energy and/or direction.
10. system according to claim 9, it is characterised in that the converter plant also includes first switch, low pressure open circuit
Device, preliminary filling electrical circuit, second switch and disconnecting switch；The high-pressure side of the transformer is connected to described by the first switch
AC network, the low-pressure side of the transformer is connected to the AC of the PWM converter by the low-voltage circuit breaker, described
The positive pole of PWM converter DC side is connected to the direct current contact net by the second switch；The PWM converter DC side
Negative pole rail is connected to by the disconnecting switch；The preliminary filling electrical circuit is parallel to the two ends of the low-voltage circuit breaker；
The first switch, low-voltage circuit breaker, second switch and disconnecting switch, are used to response first control signal or the
Two control signals, perform closed action.
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| WO2020010499A1 (en) * | 2018-07-10 | 2020-01-16 | 北京千驷驭电气有限公司 | Train traction power supply device and system, and control method |
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