CN105162310B - A kind of constructional device for tandem type cophase supply current transformer - Google Patents
A kind of constructional device for tandem type cophase supply current transformer Download PDFInfo
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- CN105162310B CN105162310B CN201510704467.9A CN201510704467A CN105162310B CN 105162310 B CN105162310 B CN 105162310B CN 201510704467 A CN201510704467 A CN 201510704467A CN 105162310 B CN105162310 B CN 105162310B
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Abstract
The present invention relates to a kind of constructional device for tandem type cophase supply current transformer, described device includes the cabinet for being available for series connection and power cell in parallel, several columns power cell single cabinet to be formed by connecting and the container for accommodating cabinet；The overall construction design of the present invention and be connected in constructional device optimization, the design of efficient series and parallel and electrical structure symmetric design for power cell form back-to-back power cell, make it possible high pressure cophase supply system function structure realization on, realize the electric split-phase of cancellation, improve train security and comfortableness, reduce technique effect of the reactive current harmonic electric current to harm to the system.
Description
Technical field
It is more particularly to a kind of to be applied to railway tandem type cophase supply the invention belongs to track traffic electric power electronic technology field
A kind of converter structure device in electric system.
Background technology
At present, China's electrified railway traction power supply system uses power frequency single phase ac power supply mode.Therefore, phase
For three-phase electrical power system, electrified railway traction power supply system is the special system of single-phase earthing, due in structure
Asymmetric, causing electrified railway traction power supply system to exist, harmonic content is big, and negative phase-sequence is protruded and many three big electric energy of reactive power
Quality problems, and the separate and random fluctuation of the electric locomotive as single-phase load so that these problems are more protruded.
In order to improve electric power quality problem, it is proposed that using including increasing power supply capacity, take the balance of special wiring to become
Depressor, traction substation commutation connection, static negative-sequence current compensating chain device etc., though these measures can mitigate high-speed overload
Negative effect, but the randomness due to traction load over time and space so that improvement is not good.Due to traction substation
Commutation connection, it is resolved that there will necessarily be electric split-phase link on Traction networks.When motor supply shop to supply arm end, it is necessary to pass through
Move back level, close auxiliary unit and disconnect the sequence of operations such as main circuit breaker, make train speed and loss of traction larger and be accompanied by
The normally travel of overvoltage phenomena impair locomotive.It is expensive because electric neutral section is complicated, thus electric neutral section into
For one of weak link in whole tractive power supply system, the development of high-speed overload railway is restricted.With high-power electric and electronic
Device come out one after another and modern power electronic control technology development, the particularly appearance of Survey of Flexible AC Transmission System Technology is real
Existing electrified railway in-phase power supply and higher levels of insertion are powered there is provided new thinking.
Current China Traction Substation of Electric Railway is all the power taking from public electric wire net, is generally exchanged using single phase industrial frequence
Electricity is locomotive power supply.The load that power system wishes all is all the fundamental current that three-phase symmetrical is taken from power network, with fully profit
With circuit, the capacity of equipment, harm of the reactive current harmonic electric current to system is reduced.To meet the requirement, electric railway
Using phase sequence rotation, the scheme that segmentation split-phase is powered.But be due to each section traction meet size can not possibly be identical at any time, point
Phase segmentation scheme simply alleviates the influence of three-phase imbalance to a certain extent, and can not fundamentally solve railway load list
Phase electricity consumption is to the whole influence for sharing power network.It is the problem of for above rail traction substation, most of at present to be mended using idle
Repay device or shunt capacitor fixed compensation pattern.Because traction meets the acute variation of operation, the mistake for just causing underloading idle
Compensation and the idle undercompensation of heavy duty, its result cause traction power supply constant power factor relatively low.
The high pressure cophase supply converter device of the topological structure also does without producer in the country at present, before in the market
Same phase formula power converter structure device because internal, use is not angle iron frame welding structure, uses insulated type
Mode connects for screw is used between material, such shortcoming is exactly that bulk strength is not high, it is necessary to which power cell and cabinet are separated when delivery
Delivery, is putting power cell into cabinet to scene, all kinds of connecting lines is being done at the scene, site operation amount is quite big one by one,
After the completion of need self-inspection line.Present structure can integrally ship whole equipment, site operation amount very little, interconnector without
Move, can be debugged with direct-electrifying again.
The content of the invention
The blank that presently, there are for high pressure cophase supply system, we are using using modern power electronics technology and Wei Chu
Device control technology is managed, the cophase supply technology of development realizes the innovation of traction power supply technology, in order to realize the utilization of the technology,
Need to develop cophase supply constructional device system, by simulating live operating condition in factory, company successfully ground with reference to me
The wind electric converter of hair, photovoltaic DC-to-AC converter, the new product such as high-power SVG, 690V large-capacity transducer, and use high pressure
The technical foundation that frequency converter is accumulated for many years, develops the constructional device for tandem type cophase supply current transformer of a new generation.
Technical solution of the present invention is as follows：
A kind of constructional device for tandem type cophase supply current transformer, described device includes being available for series connection and work(in parallel
Cabinet and the container of receiving cabinet that rate unit, several columns power cell single cabinet are formed by connecting；Each column single cabinet is a soldering frame
Front and rear door-plate is respectively arranged with before and after frame, each column power cell single cabinet for being separated into N layers, in the every of each column power cell single cabinet
One air inlet is set on one layer of corresponding front door, and there is independent ventiduct at each column single cabinet rear portion；The power cell is positioned over each column
Each layer of power cell single cabinet, and power cell internal constitutes horizontal duct from front to back, and it is aggregated into each column single cabinet rear portion
Independent ventiduct, the horizontal UNICOM of the independent ventiduct at several columns single cabinet rear portion is integral air channel；It is appropriate in each column single cabinet Rear Door
Being horizontally disposed between position and container has one section of air channel interface channel, the air channel interface channel directly with to consolidating for should arranging
The blower fan for being scheduled on packaging box back is connected, and several columns fan parallel-connection forms air channel path, N is natural number in duct outlet.
For above-mentioned " appropriate " position, if N is even number, air channel interface channel is arranged on the positive medium position of single cabinet Rear Door,
If N is odd number, air channel interface channel is arranged on the corresponding power cell in the positive middle part of single cabinet Rear Door and connected with last layer power cell
The point midway of line, its purpose is exactly the air quantity of each power cell of efficient balance in order to ensure in the case where total blast volume is certain.
Further, front door air inlet is provided with filter screen, and the filter screen contains flame retardant polyurethane sponge.
Further, multiple air inlets are opened in container forward position, and shutter, shutter are set in air inlet position
Area is much larger than the air-admitting surface set on the corresponding front door of each layer of power cell single cabinet.
Further, in addition to for connecting the copper bar and insulating part of power cell, it is introduced in after the copper bar connection
In the integral air duct of the constructional device.
Further, the copper bar and insulating part are defeated including series connection copper bar, input copper bar in parallel, rear portion switch-over row, series connection
Go out to arrange A, series connection output row B, power cell input copper bar, front and rear switch-over row, rear portion output row A, rear portion output row B and insulation branch
Post, insulation folder and insulation thick stick；The power cell includes two parts joint up and down, and upper connection is power unit cascade
Side, containing U, V two-phase, the series side is concatenated U, V phase of adjacent power unit by copper bar of connecting, the head and the tail difference after concatenation
It is connected to respectively by front and rear switch-over row for series connection output row A, series connection output row B, the series connection output row A, series connection output row B
Rear portion output row A and rear portion output row B；Lower connector is power cell side in parallel, the connection input copper bar in parallel in side in parallel,
Parallel connection input copper bar connects rear portion switch-over row by front and rear switch-over row, then is connected to form logical with rear portion power cell input copper bar
Road；Wherein front and rear switch-over row is fixed on by insulation column in the lead frame of single cabinet side, and power cell input copper bar passes through
Insulation folder is held within the insulation thick stick of independent ventiduct, and insulation thick stick is arranged in lead frame.
Further, adjacent power unit single cabinet, which is connected by screw, forms.
Further, each column power cell single cabinet is provided with insulation board between being divided into every layer of N layers.
Further, the power cell be divided into above and below two parts, top is series side electric loop, and bottom is side in parallel
Horizontal duct, and top and the bottom structure specular are formed between electric loop, upper and lower part.
Further, in addition to thin-film capacitor, go here and there and side stack bus bar, series and parallel side electric loop is by IGBT
Power external member, stack bus bar, control plate, output copper bar composition, the IGBT power external member include radiator, thin-film capacitor and
Radiator is positioned in horizontal duct, goes here and there and side connection stack bus bar connects the stack bus bar of top and the bottom.
Compared with the prior art, the invention has the advantages that：
The overall construction design of the present invention, power cell optimize efficient series and parallel design and electricity in constructional device
Depressed structure symmetric design forms back-to-back power cell so that the function of high pressure cophase supply system turns into structure realization
May, realize the electric split-phase of cancellation, improve train security and comfortableness, reduce reactive current harmonic electric current to harm to the system
Technique effect.
In large-scale power electronic equipment, equipment can be reduced with the increase of temperature, life-span, and crash rate can increase, cold wind
From container shutter to cabinet front gate inlet air mouthful, flow through after power cell internal independence wind chamber, by the thermal losses of power device
Power, which is brought out, to be changed into hot blast and is aggregated into the integral air duct of rear portion, takes hot blast out of by centrifugal blower and air is discharged into outside container
In, the Duct design of the constructional device solves the radiating of the power device in cophase supply current transformer, has greatly reinforced equipment
Reliability and stability.
Equipment is arranged on internal container, any location of railway can be conveniently positioned over container, it is easy to move, and protects
Grade is IP53；Container and cabinet use welding structure technology, and the advantage of the technology is that equipment integrally has very high machine
Tool intensity, the advantages of cabinet deformation is small, it is overall shipping, protection equipment when delivering transport that can ensure cabinet to greatest extent
Interior device is not damaged by.
Conventional fan is placed at the top of cabinet so that the range difference of each power cell rear portion air outlet to blower fan away from big,
Each power cell wind flow difference is big, and blower fan is placed on cabinet rear portion air outlet by the present invention, is typically provided with three layers, is passed through
Experiment can obtain the optimum height of blowing machine placement so that the distance of upper two layers of power cell rear portion air outlet to blower fan is consistent,
Range difference with lower floor's power cell rear portion air outlet to blower fan equally shortens the distance in all air channels, reduced away from reduction
Windage, improves wind speed；The advantage of the technology is that each power cell radiating is balanced, and cooling fan utilization rate is high, radiating effect
It is really good.
Air intake vent on front door is equipped with 35PPI flame retardant polyurethane sponge, and its performance is fire-proof and water-proof acid-alkali-corrosive-resisting,
When air intake vent air intake, the larger dust granule that can be crossed in air filtering prevents environmental contaminants from entering device interior, according to
Ambient conditions, periodically to equipment filter gauze cleaning, the advantage of the technology is to reduce the class of pollution, and what raising equipment was run can
By property.
The copper bar of connection power cell is introduced in cooling and maintenance that integral air duct is conducive to copper bar, multigroup power cell
Input copper bar is fixed on insulation thick stick using insulation folder, and entered from air channel inside unit so that cabinet interior cabling
Neatly, the advantage of the technology is to make full use of duct space, and Operation and Maintenance all facilitates.
In power cell structure design aspect, because power cell is using IGBT as core devices, switching frequency is high, it is desirable to straight
Flow bus stray inductance small, prevent because the spike voltage in IGBT switching processes causes it to damage.Therefore, my company proposes
A kind of power cell sandwich bus structure designing technique, the technology uses the busbar laminate with capacity effect, can effectively reduce
The spike voltage that inductance is produced in dc bus stray inductance, reduction IGBT action process, it is ensured that work safe and reliable IGBT.
Power external member unit is bought simultaneously, and external member advantage is small volume, efficiency high, dependable performance；Other electric capacity uses thin-film capacitor, carries
High equipment dependability and life-span.
Brief description of the drawings
Fig. 1 is side sectional view of the present invention.
Fig. 2 is front view of the present invention.
Fig. 3 is dorsal view of the present invention.
Fig. 4 is front door figure of the present invention.
Fig. 5 is Rear Door figure of the present invention.
Fig. 6 is that the present invention removes front door figure.
Fig. 7 is that the present invention removes Rear Door figure.
Fig. 8 is power cell partial enlarged drawing in the present invention.
Fig. 9 is power cell structure figure of the present invention.
Figure 10 is cabinet profile of the present invention.
Embodiment
Further a kind of structure for tandem type cophase supply current transformer of the present invention is filled below in conjunction with accompanying drawing
Put and be described.
As shown in figure 1, the converter equipment of the present invention is placed in container, pass through bottom fot screw and container bottom
Seat is connected, and the draft type of equipment is horizontal ventilation, and cold wind enters each column unit cabinet front door from container shutter, before
The filter screen in door upper, middle and lower portion enters each power cell internal independent ventiduct, collects upper, middle and lower air channel to cabinet rear portion, by
One blower fan extracts upper, middle and lower three-layer unit hot blast out, and the corresponding air inlet filter screen in front door is arranged in parallel, by multiple similar single cabinets
It is arranged in parallel, rear portion air channel is aggregated into a wind trunk, is run by multiple fan parallel-connections, and integral heat sink effect is good.
As shown in Fig. 2 container front view is by multigroup shutter, maintenance door composition has equipment to pass in and out gate, owned sideways
Door is closed mode when equipment is run, and equipment is cooled down as air intake vent air intake by shutter.
As shown in figure 3, container dorsal view is by multiple centrifugal blower laid out in parallel, on container, each blower fan
Left and right upper side is shut, and is only mounted below air outlet, and hanging over outdoor can be flowed back with rainwater-proof, outwards be blown during fan operation
Wind so that negative pressure is formed in air channel, the heat of electronic device is taken out of, air-cooled effect is reached.
As shown in figure 4, internal current transformer front door figure is all covered anterior by preceding door cover plate with handles, five lists
First cabinet is constituted with cabinet mode connects for screw is spelled, and each unit cabinet fills upper, middle and lower three-layer unit, and the air intake vent correspondence of each front door is internal
Air intake vent on the air intake vent of each unit, front door is equipped with 35PPI flame retardant polyurethane sponge, and its performance is that fire-proof and water-proof is resistance to
Acid and alkali corrosion, when air intake vent air intake, the larger dust granule that can be crossed in air filtering prevents environmental contaminants from entering equipment
Inside, improves equipment dependability.
As shown in figure 5, internal current transformer Rear Door figure is all covered at rear portion by rear door cover plate with handles, allow after cabinet
Portion forms air channel, middle and upper part position opening so as to connecting fan passage, junction is ring flange connection, inspection easy to disassemble
Look into.
As shown in fig. 6, current transformer removes front door figure between five unit cabinets, 15 power cells and several units
Connecting copper bar constitute.Two parts joint above and below power cell point, upper connection is series side, by 15 power before cabinet
The series side of unit is connected in series with series connection copper bar, and the series connection output row A and series connection output row B of a remaining first tail unit pass through
Front and rear switch-over row guides to cabinet rear portion output row A and rear portion output row B air channel of collecting is exported；Lower connector is side in parallel, and
Connection side copper bar is fixed on front and rear switch-over row, and front and rear switch-over row is fixed on insulation column, and insulation column is fixed on single cabinet side
In lead frame, the air channel of collecting for guiding to cabinet rear portion by front and rear switch-over row connects with rear portion switch-over row and power cell input copper bar
Path is connected into power.
As shown in fig. 7, current transformer is gone, Rear Door figure inputs copper bar group by power cell and switching copper bar is constituted, all inputs
Copper bar is clipped using insulation folder and is fixed on vertical insulation bar, and insulation bar is fixed in lead frame, and multigroup copper bar is collecting
Copper bar is conducive to radiate in air channel, stability is more preferable.
As shown in figure 8, power cell partial enlarged drawing is amplified to be best understood from the one of Fig. 6 Fig. 7 mode of connection
View.
As shown in figure 9, two parts above and below being divided into power cell structure figure, top is series side electric loop, by IGBT
Power external member（Containing radiator）, stack bus bar, control plate, output copper bar composition；Bottom is side in parallel electric loop, by IGBT
Power external member（Containing radiator）, stack bus bar, control plate, output copper bar composition；The shared thin-film capacitor in connection in series-parallel side with it is upper
The radiator of lower part is located in the inside air channel formed in the middle part of unit, and simultaneously side connects stack bus bar by top and the bottom to the string of side
The electrical connection divided, a back-to-back power cell of likeness in form is constituted by external rack, will according to the main loop design of unit
Each power device is connected, and series side and side structure in parallel are that top and the bottom mirror is symmetrical, and radiator and thin-film capacitor are placed
Wind-cooling heat dissipating is internally carried out in air channel.
As shown in Figure 10, by framework, insulation column, insulation folder, insulation thick stick, front and rear switch-over row group in cabinet sectional view
Into the anterior connection in series-parallel copper bar of main display is to guide to air channel rear portion by front and rear switching copper bar, and row A, B company is exported with rear portion
Connect and power cell input in rear portion is drained to position and is fixed on by all kinds of insulating materials on framework.
Description for the understanding of embodiment is only to understand the present invention for help, rather than for limiting this hair
Bright.Those skilled in the art can be carried out some using the thought of the present invention and change and change, as long as its technological means has
Depart from the thought and main points of the present invention, still within protection scope of the present invention.
Claims (6)
1. a kind of constructional device for tandem type cophase supply current transformer, it is characterised in that：Described device includes being available for series connection
The cabinet and the container of receiving cabinet being formed by connecting with power cell in parallel, several columns power cell single cabinet；Each column single cabinet
For a lead frame, front and rear door-plate is respectively arranged with before and after each column power cell single cabinet for being separated into N layers, in each column power list
One air inlet is set on the corresponding front door of each layer of first single cabinet, and there is independent ventiduct at each column single cabinet rear portion；The power cell
Each layer of each column power cell single cabinet is positioned over, and power cell internal constitutes horizontal duct from front to back, and be aggregated into every
The independent ventiduct at list cabinet rear portion, the horizontal UNICOM of independent ventiduct at several columns single cabinet rear portion is integral air channel；In each column single cabinet
Being horizontally disposed between Rear Door appropriate location and container has one section of air channel interface channel, the air channel interface channel directly with it is right
The blower fan for being fixed on packaging box back that should be arranged is connected, and several columns fan parallel-connection forms air channel path, N in duct outlet
For natural number；
Also include the copper bar and insulating part for being used to connect power cell, the constructional device is introduced in after the copper bar connection
In integral air duct；
The copper bar and insulating part include series connection copper bar, input copper bar in parallel, rear portion switch-over row, series connection output row A, series connection output
Arrange B, power cell input copper bar, front and rear switch-over row, rear portion output row A, rear portion output row B and insulation column, insulation folder and
Insulate thick stick；The power cell includes two parts joint up and down, and upper connection is power unit cascade side, containing U, V two-phase, institute
Series side is stated to concatenate U, V phase of adjacent power unit by copper bar of connecting, the head and the tail after concatenation be respectively series connection output row A,
Series connection output row B, series connection output row A, series connection output row B respectively by front and rear switch-over row be connected to rear portion output row A and
Rear portion output row B；Lower connector is power cell side in parallel, the connection input copper bar in parallel in side in parallel, parallel connection input copper bar
Rear portion switch-over row is connected by front and rear switch-over row, then is connected to form path with rear portion power cell input copper bar；Wherein front and rear turn
Run in and be fixed on by insulation column in the lead frame of single cabinet side, power cell input copper bar is fixed on by the folder that insulate
On the insulation thick stick of independent ventiduct, insulation thick stick is arranged in lead frame；
The power cell be divided into above and below two parts, top is series side electric loop, and bottom is side electric loop in parallel, it is upper,
Horizontal duct, and top and the bottom structure specular are formed between bottom.
2. a kind of constructional device for tandem type cophase supply current transformer according to claim 1, it is characterised in that：Before
Door-plate air inlet is provided with filter screen, and the filter screen contains flame retardant polyurethane sponge.
3. a kind of constructional device for tandem type cophase supply current transformer according to claim 1, it is characterised in that：
Multiple air inlets are opened in container forward position, and set shutter in air inlet position, and blinds window ara is much larger than power cell
The air-admitting surface set on the corresponding front door of each layer of single cabinet.
4. a kind of constructional device for tandem type cophase supply current transformer according to claim 1, it is characterised in that：Phase
Adjacent power cell single cabinet, which is connected by screw, to be formed.
5. a kind of constructional device for tandem type cophase supply current transformer according to claim 1, it is characterised in that：Often
Row power cell single cabinet is provided with insulation board between being divided into every layer of N layers.
6. a kind of constructional device for tandem type cophase supply current transformer according to claim 1, it is characterised in that：Also
Including thin-film capacitor, go here and there and side connection stack bus bar, series and parallel side electric loop is female by IGBT power external member, lamination
Row, controls plate, and output copper bar composition, the IGBT power external member includes radiator, and thin-film capacitor and radiator are positioned over water
In flat air channel, go here and there and side connection stack bus bar connects the stack bus bar of top and the bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510704467.9A CN105162310B (en) | 2015-10-27 | 2015-10-27 | A kind of constructional device for tandem type cophase supply current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510704467.9A CN105162310B (en) | 2015-10-27 | 2015-10-27 | A kind of constructional device for tandem type cophase supply current transformer |
Publications (2)
| Publication Number | Publication Date |
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| CN105162310A CN105162310A (en) | 2015-12-16 |
| CN105162310B true CN105162310B (en) | 2017-09-12 |
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| CN201510704467.9A Active CN105162310B (en) | 2015-10-27 | 2015-10-27 | A kind of constructional device for tandem type cophase supply current transformer |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113726203B (en) * | 2020-05-22 | 2024-01-30 | 株洲中车时代电气股份有限公司 | Simplified and unified converter circuit and converter device |
| CN112398311A (en) * | 2020-11-10 | 2021-02-23 | 西安许继电力电子技术有限公司 | Multi-module series-parallel power converter device |
| CN114221521B (en) * | 2021-12-14 | 2023-11-24 | 浙江华章科技有限公司 | Novel electrical variable frequency cabinet |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101145727A (en) * | 2007-09-26 | 2008-03-19 | 上海新时达电气有限公司 | Heat radiation device for middle and high voltage high-power case frequency converter |
| CN100596005C (en) * | 2008-01-28 | 2010-03-24 | 中国电力科学研究院 | Power module cascade connection converter valve |
| CN202856601U (en) * | 2012-09-28 | 2013-04-03 | 广东明阳龙源电力电子有限公司 | Module capacitor device utilizing overall unit air channel to dissipate heat |
| CN203056825U (en) * | 2012-12-03 | 2013-07-10 | 江苏大全凯帆电器股份有限公司 | Wind power current transformer cabinet power unit heat radiation structure |
| CN205092759U (en) * | 2015-10-27 | 2016-03-16 | 东方日立(成都)电控设备有限公司 | A constructional device for tandem type cophase power supply converter |
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