CN105978299A - Water cooling and high voltage frequency converter system - Google Patents
Water cooling and high voltage frequency converter system Download PDFInfo
- Publication number
- CN105978299A CN105978299A CN201610520433.9A CN201610520433A CN105978299A CN 105978299 A CN105978299 A CN 105978299A CN 201610520433 A CN201610520433 A CN 201610520433A CN 105978299 A CN105978299 A CN 105978299A
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- feed pump
- main filter
- water
- heat exchanger
- plate level
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D27/00—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00
- G05D27/02—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00 characterised by the use of electric means
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
The invention discloses a water cooling and high voltage frequency converter system which includes a three-phase multi-secondary side winding transformer, N power units, a control system and a water cooling system. The three-phase multi-secondary side winding transformer has a primary side which is connected to a voltage output end of a three-phase power grid. Each winding of each secondary side of the three-phase multi-secondary line winding transformer is connected to one power unit. The control system is in separate connection to the three-phase multi-secondary line winding transformer, N power units, and the water cooling system. The control system monitors operation conditions of the three-phase multi-secondary line winding transformer, and controls the water cooling system to conduct cooling on the three-phase multi-secondary line winding transformer on the basis of the operation conditions. The control system monitors operation conditions of N power units, and controls the water cooling system on the basis of the operation conditions to conduct cooling on the N power units. According to the invention, the system can meet special requirements of special industries such as nuclear power, at the same time reduces the difficulty of on-site construction, and reduces maintenance workload.
Description
Technical field
The present invention relates to high-voltage frequency converter technology field, particularly relate to a kind of water-cooled high voltage converter system.
Background technology
Along with the development of Power Electronic Technique, converter as the important component part of Intelligent electronic control system,
Play more and more heavier in the every field of national economy, the such as industries such as electric power, water conservancy, petrochemical industry, metallurgy
The effect wanted.
The industrialized fast development of China promotes motor manufacture and sends out to high-power direction with application
Exhibition, high-power cascaded high-voltage frequency converter is in order to drag high-voltage high-power motor, in nuclear power, petrochemical industry, smelting
Gold industry is widely used.Heavy-duty motor is often the Primary Component in corresponding industry, and event occurs
Barrier can cause whole production system out of service, even influences whether corresponding electric power networks, oil gas pipeline
Stable operation etc. the infrastructure involved the interests of the state and the people.
Conventional water-cooling type high voltage converter uses Wind-cooling type only with water-cooled power cell, phase-shifting transformer
Dry-type transformer or oil-filled transformer, reduce the reliability of product, add site operation difficulty and
Cost, and need to increase line service amount.
Summary of the invention
The invention provides a kind of water-cooled high voltage converter system, it is possible to meet the spy of the special trades such as nuclear power
Different demand, reduces site operation difficulty simultaneously, reduces maintenance workload.
The invention provides a kind of water-cooled high voltage converter system, including: three-phase many vice-side winding transformator,
N number of power cell, control system and water cooling system；Wherein:
Described three-phase many vice-side winding transformator is water-cooled phase-shifting transformer；
Described power cell is Water-cooled power unit；
The former limit of described three-phase many vice-side winding transformator is connected with the voltage output end of three phase network, described
Each winding and a power cell of the secondary of three-phase many vice-side winding transformator are connected；
Described control system respectively with described three-phase many vice-side winding transformator, N number of power cell and water-cooled
But system is connected；
Described control system monitors the operation conditions of described three-phase many vice-side winding transformator, and according to running
Situation controls described water cooling system and cools down three-phase many vice-side winding transformator；
Described control system monitors the operation conditions of described N number of power cell, and controls according to operation conditions
N number of power cell is cooled down by described water cooling system.
Preferably, described control system includes: temperature sensor；
By the operation conditions of three-phase many vice-side winding transformator described in described temperature sensor monitors；
Operation conditions by N number of power cell described in described temperature sensor monitors.
Preferably, described water cooling system includes: the first feed pump, the first expansion drum, the first ion are handed over
Parallel operation, the first main filter, the first plate level heat exchanger and alkalization device；Wherein:
Described alkalization device is connected with described first feed pump；
Described first feed pump is connected with described first plate level heat exchanger；
Described first plate level heat exchanger is connected with described first main filter；
Described first ion exchanger is connected with described first main filter；
Described first expansion drum is connected between described alkalization device and described first feed pump.
Preferably, described water cooling system also includes: the second feed pump, the second expansion drum, the second ion
Exchanger, the second main filter and the second plate level heat exchanger；Wherein:
Described first feed pump and the second feed pump are in parallel；
Described first expansion drum is in parallel with described second expansion drum；
Described first ion exchanger is in parallel with described second ion exchanger；
Described first main filter and the second main filter are in parallel；
Described first plate level heat exchanger is in parallel with described second plate level heat exchanger；
Described alkalization device is connected with described first feed pump and the second feed pump；
Described first feed pump is connected with described first plate level heat exchanger；
Described first plate level heat exchanger is connected with described first main filter；
Described first ion exchanger is connected with described first main filter；
Described first expansion drum is connected between described alkalization device and described first feed pump；
Described second feed pump is connected with described second plate level heat exchanger；
Described second plate level heat exchanger is connected with described second main filter；
Described second ion exchanger is connected with described second main filter；
Described second expansion drum is connected between described alkalization device and described second feed pump；
Described second feed pump, the second expansion drum, the second ion exchanger, the second main filter and second
Plate level heat exchanger composition back-up circuit.
From such scheme, a kind of water-cooled high voltage converter system that the present invention provides, by control it is
The operation conditions of system monitoring three-phase many vice-side winding transformator and the operation conditions of N number of power cell, according to
Operation conditions controls cooling water system and carries out three-phase many vice-side winding transformator and N number of power cell respectively
Cooling, installs air channel relative to common air cooling form without aiming at transformator again, thus has saved construction
Cost；Relative to oil-filled transformer without independently installed, reducing difficulty of construction, floor space is little,
And in follow-up production process, decrease the workload of maintenance；Meanwhile, power cell uses water-cooled shape
Formula is dispelled the heat, it is not necessary to job site aims at power cell and installs air channel, has saved construction cost, water-cooling
Efficiency is far above wind-cooling heat dissipating, is more suitable for the occasion of relatively high power.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to reality
Execute the required accompanying drawing used in example or description of the prior art to be briefly described, it should be apparent that below,
Accompanying drawing in description is only some embodiments of the present invention, for those of ordinary skill in the art,
On the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the main circuit topology of power unit cascade three-phase many vice-side winding transformator disclosed by the invention
Structure chart；
Fig. 2 is the structural representation of a kind of water-cooled high voltage converter system disclosed in the embodiment of the present invention one；
Fig. 3 is the structural representation of water cooling system disclosed in the embodiment of the present invention two；
Fig. 4 is the structural representation of water cooling system disclosed in the embodiment of the present invention three.
Detailed description of the invention
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
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the present invention, and
It is not all, of embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art are not doing
Go out the every other embodiment obtained under creative work premise, broadly fall into the scope of protection of the invention.
As it is shown in figure 1, the major loop of the cascaded high-voltage frequency converter commonly used at present is mainly many by three-phase
Vice-side winding transformator 1 and several power cells 2 form.
As in figure 2 it is shown, disclosed in the embodiment of the present invention one a kind of water-cooled high voltage converter system, including:
Three-phase many vice-side winding transformator 1, N number of power cell 2, control system 23 and water cooling system 24；
Wherein:
Three-phase many vice-side winding transformator 1 is water-cooled phase-shifting transformer；
Described power cell 2 is Water-cooled power unit；
The former limit of three-phase many vice-side winding transformator 1 is connected with the voltage output end of three phase network, and three-phase is many
Each winding of the secondary of vice-side winding transformator 1 and a power cell 2 are connected；
Control system 23 respectively with three-phase many vice-side winding transformator 1, N number of power cell 2 and water cooling
System 24 is connected；
Control system 23 monitors the operation conditions of three-phase many vice-side winding transformator 1, and according to operation conditions
Control water cooling system 24 three-phase many vice-side winding transformator 1 is cooled down；
Control system 23 monitors the operation conditions of N number of power cell 2, and controls water-cooled according to operation conditions
But N number of power cell 2 is cooled down by system 24.
The operation principle of above-described embodiment is, when needs are to three-phase many vice-side winding transformator 1 and N number of merit
When rate unit 2 carries out water cooling, monitored the operation of three-phase many vice-side winding transformator by control system 23
State, such as can be by the running temperature of temperature sensor monitors three-phase many vice-side winding transformator, root
According to the temperature rise prison between absolute temperature and transformator water outlet and the water inlet of the transformer outlet cooling water sampled
Control transformator running status, then according to operation conditions control water cooling system 24 secondary many to three-phase around
Group transformator 1 cools down.Three-phase many vice-side winding transformator of the present invention can be that water-cooled phase shift becomes
Depressor, when water cooling system cools down, can be by cooling water be injected water-cooled phase-shifting transformer
Copper conductor transformator is cooled down.
Meanwhile, monitored the operation conditions of N number of power cell 2 by control system 23, such as, can pass through
The operation conditions of temperature sensor monitors power cell, then controls water cooling system 24 according to operation conditions
Power cell is cooled down.The power cell of the present invention is Water-cooled power unit, at water cooling system
When cooling down, can by the water inlet of water-cooling plate by cooling water injecting power unit, then from
Outlet flows out, it is achieved the cooling to power cell.
In sum, in the above-described embodiments, three-phase many vice-side winding transformator is monitored by control system
Operation conditions and the operation conditions of N number of power cell, control cooling water system respectively according to operation conditions
Three-phase many vice-side winding transformator and N number of power cell are cooled down, relative to common air cooling form
Without aiming at transformator again, air channel is installed, thus has saved construction cost；Relative to oil-filled transformer without
Needing independently installed, reduce difficulty of construction, floor space is little, and reduces in follow-up production process
The workload safeguarded；Meanwhile, power cell uses the heat radiation of water-cooled form, it is not necessary to job site aims at merit
Rate unit installs air channel, has saved construction cost, and water-cooling efficiency is far above wind-cooling heat dissipating, more applicable
Occasion in relatively high power.
At water cooling system, three-phase many vice-side winding transformator and N number of power cell are cooled down simultaneously
During, owing to three-phase many vice-side winding transformator is different with the caloric value of power cell itself, cause two
The traffic requirement of person there are differences；Again because of transformator and the physical Design reason of power cell, both
Water-cooled length of pipe and bore are the most different, cause both flow resistances to there is difference.Therefore water cooling system exists
Under conditions of common recycle water pump, need to meet three-phase many vice-side winding transformator and power cell simultaneously
Cooling requirements；Simultaneously as cooling water needs to be simultaneously injected into three-phase many vice-side winding Transformer Winding
The water inlet of the water-cooling plate of hollow core conductor and power cell cools down, due to hollow core conductor and water-cooled
Heat sink all uses copper material, it is clear that, the ion in cooling water will produce corrosiveness to copper pipe.
Need the ion concentration of cooling water is controlled to extend the service life of product, reduce cooling water pair
The corrosion of pipe material.
For the problems referred to above, as it is shown on figure 3, the embodiment of the present invention two discloses a kind of water cooling system,
Including: first feed pump the 5, first expansion drum the 6, first ion exchanger the 7, first main filter 8,
First plate level heat exchanger 9 and alkalization device 4；Wherein:
Alkalization device 4 is connected with the first feed pump 5；
First feed pump 5 is connected with the first plate level heat exchanger 9；
First plate level heat exchanger 9 is connected with the first main filter 8；
First ion exchanger 7 is connected with the first main filter 8；
First expansion drum 6 is connected to alkalize between device 4 and the first feed pump 5.
During cooling, first, according to three-phase many vice-side winding transformator and the operation of power cell
Requirement, calculates both caloric values respectively, and then draws the cooling water flow that both need；
Secondly, length and bore according to both water-cooled pipelines calculate the flow resistance value under metered flow, and then
Draw the cooling water pressure that both need；
Finally, carry out pump selection according to the cooling water flow calculated and pressure, and select suitably
Valve controls three-phase many vice-side winding transformator and the flow of two cooling circuits of power cell group and pressure respectively
Power meets calculating requirement.
In order to reduce the cooling water corrosion to pipe material, need the many factors affecting corrosion of piping,
Comprehensively analyze such as pH value, dissolved oxygen content, electrical conductivity, temperature and flow velocity etc., specifically take as
Lower measure:
First, water cooling system adds alkalization device, makes the pH value of cooling water be maintained at 7.5-8.5
Between, can effectively reduce corrosion, suppress dissolved oxygen concentration, reduce pipeline deposition, prevent pipeline blockage
Etc. problem.
Secondly, in main circulation loop, deionization loop in parallel, reaches the mesh of the extremely low electrical conductivity of long term maintenance
's.
Finally, temperature and flow velocity by controlling cooling water reduce cooling water to pipeline in the range of suitably
The impact of corrosion.
In terms of controlling motility, compare wind-cooling heat dissipating due to water-cooling and there is natural inferior position, water cooling system
In system major loop, the fault of any device all will cause converter to lose heat-sinking capability and shut down, and cause industrial and mineral
The major accidents such as enterprise's stopping production.Therefore operational reliability is required that higher occasion can take double loop to set
The water cooling system of meter.
The most as shown in Figure 4, a kind of water cooling system disclosed in the embodiment of the present invention three, including: the
One feed pump the 5, first expansion drum the 6, first ion exchanger 7, first main filter the 8, first plate level
Heat exchanger 9, alkalization device the 4, second feed pump the 10, second expansion drum the 11, second ion exchanger 12,
Second main filter 13 and the second plate level heat exchanger 14；Wherein:
First feed pump 5 and the second feed pump 10 are in parallel；
First expansion drum 6 is in parallel with the second expansion drum 11；
First ion exchanger 7 is in parallel with the second ion exchanger 12；
First main filter 8 and the second main filter 13 are in parallel；
First plate level heat exchanger 9 is in parallel with the second plate level heat exchanger 14；
Alkalization device 4 is connected with the first feed pump 5 and the second feed pump 6；
First feed pump 5 is connected with the first plate level heat exchanger 9；
First plate level heat exchanger 9 is connected with the first main filter 8；
First ion exchanger 7 is connected with the first main filter 8；
First expansion drum 6 is connected to alkalize between device 4 and the first feed pump 5；
Second feed pump 10 is connected with the second plate level heat exchanger 14；
Second plate level heat exchanger 14 is connected with the second main filter 13；
Second ion exchanger 12 is connected with the second main filter 13；
Second expansion drum 11 is connected between alkalized device 4 and the second feed pump 10；
Second feed pump the 10, second expansion drum the 11, second ion exchanger the 12, second main filter 13
Back-up circuit is formed with the second plate level heat exchanger 14.
By second feed pump the 10, second expansion drum the 11, second ion exchanger the 12, second main filter
13 and second plate level heat exchanger 14 form back-up circuit, by original first feed pump the 5, first expansion drum
6, the major loop of first ion exchanger 7, first main filter the 8, first plate level heat exchanger 9 composition is altogether
With forming water cooling system, and two loops all possess the ability standing alone as converter heat radiation, can be effective
Single failure in water cooling system is avoided to cause the generation of converter stopping accident.Two loops are adopted simultaneously
By the mode of operation of exchange-column shift, in the case of converter is properly functioning, water cooling labyrinth can be tieed up
Protect, it is to avoid loop causing trouble rate that overuses improves, and is effectively improved the use longevity of water cooling system
Life.
In sum, present invention employs above design, have the advantage that
1, in the present invention, three-phase many vice-side winding transformator uses the dry-type transformer of water cooling form, relatively
Without aiming at transformator again, air channel is installed in common air cooling form dry-type transformer, thus has saved construction
Cost；Relative to oil-filled transformer without independently installed, reducing difficulty of construction, floor space is little,
And in follow-up production process, decrease the workload of maintenance.
2, the power cell of the present invention uses the heat radiation of water-cooled form, it is not necessary to job site aims at power cell peace
Dress air channel, has saved construction cost, and water-cooling efficiency is far above wind-cooling heat dissipating, is more suitable for bigger merit
The occasion of rate.
3, the present invention uses water cooling system and outer water heat-exchanger rig are integrated in frequency convertor system, permissible
Reduce small product size, save civil engineering cost.
If the function described in the present embodiment method realizes and as independent using the form of SFU software functional unit
When production marketing or use, a calculating device-readable can be stored in and take in storage medium.Based on so
Understanding, part or the part of this technical scheme that prior art is contributed by the embodiment of the present invention can
Embodying with the form with software product, this software product is stored in a storage medium, if including
Dry instruction with so that calculating equipment (can be personal computer, server, mobile computing device
Or the network equipment etc.) perform all or part of step of method described in each embodiment of the present invention.And it is front
The storage medium stated includes: USB flash disk, portable hard drive, read only memory (ROM, Read-Only Memory),
Random access memory (RAM, Random Access Memory), magnetic disc or CD etc. are various can
To store the medium of program code.
In this specification, each embodiment uses the mode gone forward one by one to describe, and each embodiment stresses
Being the difference with other embodiments, between each embodiment, same or similar part sees mutually.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses
The present invention.Multiple amendment to these embodiments will be aobvious and easy for those skilled in the art
See, generic principles defined herein can without departing from the spirit or scope of the present invention,
Realize in other embodiments.Therefore, the present invention is not intended to be limited to the embodiments shown herein,
And it is to fit to the widest scope consistent with principles disclosed herein and features of novelty.
Claims (4)
1. a water-cooled high voltage converter system, it is characterised in that including: three-phase many vice-side winding transformation
Device, N number of power cell, control system and water cooling system；Wherein:
Described three-phase many vice-side winding transformator is water-cooled phase-shifting transformer；
Described power cell is Water-cooled power unit；
The former limit of described three-phase many vice-side winding transformator is connected with the voltage output end of three phase network, described
Each winding and a power cell of the secondary of three-phase many vice-side winding transformator are connected；
Described control system respectively with described three-phase many vice-side winding transformator, N number of power cell and water-cooled
But system is connected；
Described control system monitors the operation conditions of described three-phase many vice-side winding transformator, and according to running
Situation controls described water cooling system and cools down three-phase many vice-side winding transformator；
Described control system monitors the operation conditions of described N number of power cell, and controls according to operation conditions
N number of power cell is cooled down by described water cooling system.
System the most according to claim 1, it is characterised in that described control system includes: temperature
Sensor；
By the operation conditions of three-phase many vice-side winding transformator described in described temperature sensor monitors；
Operation conditions by N number of power cell described in described temperature sensor monitors.
System the most according to claim 2, it is characterised in that described water cooling system includes: the
One feed pump, the first expansion drum, the first ion exchanger, the first main filter, the first plate level heat exchanger
With alkalization device；Wherein:
Described alkalization device is connected with described first feed pump；
Described first feed pump is connected with described first plate level heat exchanger；
Described first plate level heat exchanger is connected with described first main filter；
Described first ion exchanger is connected with described first main filter；
Described first expansion drum is connected between described alkalization device and described first feed pump.
System the most according to claim 3, it is characterised in that described water cooling system also includes:
Second feed pump, the second expansion drum, the second ion exchanger, the second main filter and the second plate level heat exchange
Device；Wherein:
Described first feed pump and the second feed pump are in parallel；
Described first expansion drum is in parallel with described second expansion drum；
Described first ion exchanger is in parallel with described second ion exchanger；
Described first main filter and the second main filter are in parallel；
Described first plate level heat exchanger is in parallel with described second plate level heat exchanger；
Described alkalization device is connected with described first feed pump and the second feed pump；
Described first feed pump is connected with described first plate level heat exchanger；
Described first plate level heat exchanger is connected with described first main filter；
Described first ion exchanger is connected with described first main filter；
Described first expansion drum is connected between described alkalization device and described first feed pump；
Described second feed pump is connected with described second plate level heat exchanger；
Described second plate level heat exchanger is connected with described second main filter；
Described second ion exchanger is connected with described second main filter；
Described second expansion drum is connected between described alkalization device and described second feed pump；
Described second feed pump, the second expansion drum, the second ion exchanger, the second main filter and second
Plate level heat exchanger composition back-up circuit.
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| CN201610520433.9A CN105978299A (en) | 2016-07-05 | 2016-07-05 | Water cooling and high voltage frequency converter system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610520433.9A CN105978299A (en) | 2016-07-05 | 2016-07-05 | Water cooling and high voltage frequency converter system |
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| CN108900136A (en) * | 2018-07-31 | 2018-11-27 | 中车永济电机有限公司 | A kind of multiphase Frac unit electric driving control system |
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| CN205753952U (en) * | 2016-07-05 | 2016-11-30 | 沈阳远大电力电子科技有限公司 | A kind of water-cooled high voltage converter system |
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