CN107920450A - A kind of cooling system for extra-high voltage direct-current transmission converter valve - Google Patents
A kind of cooling system for extra-high voltage direct-current transmission converter valve Download PDFInfo
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- CN107920450A CN107920450A CN201610885264.9A CN201610885264A CN107920450A CN 107920450 A CN107920450 A CN 107920450A CN 201610885264 A CN201610885264 A CN 201610885264A CN 107920450 A CN107920450 A CN 107920450A
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- cooling system
- cooling
- radiator
- parts
- secondary cooling
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
- H05K7/20936—Liquid coolant with phase change
-
- 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/003—Constructional details, e.g. physical layout, assembly, wiring or busbar connections
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- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Power Engineering (AREA)
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Abstract
The present invention provides a kind of cooling system for extra-high voltage direct-current transmission converter valve, extra-high voltage direct-current transmission converter valve includes：The converter valve 18 being composed in series by thyristor converter valve module 13；Direct current transportation cooling system includes：Primary cooling system and secondary cooling system；Primary cooling system includes：Condenser 8 and its set heat-exchanging component；Secondary cooling system includes：Secondary cooling medium back flow pipe 14, secondary cooling apparatus 15, circulating pump 16 and secondary cooling media outlet pipe 17.Cooling system provided by the invention is easy to maintain, good economy performance, and the Phase cooling medium circulation power in Phase cooling system is lost by component thermals such as thyristor and damping resistances and provided, and without additionaling power, makes the self-circulation system of whole system self-contained independence.
Description
Technical field
The present invention relates to extra-high voltage direct-current transmission converter valve field, in particular to one kind is changed for extra-high voltage direct-current transmission
Flow the cooling system of valve.
Background technology
With the development of high voltage dc transmission technology, the type of cooling of extra-high voltage direct-current transmission converter valve experience by it is air-cooled,
The water cooling mode of oil cooling till now, for relatively air-cooled, oil cooling, the thermal conductivity factor highest of water, specific heat capacity is maximum, and convection current is changed
Thermal energy power is most strong, and air, oil, the convection transfer rate ratio of water are 1：10：100, so cooling can be substantially improved using water cooling
Effect, under identical cooling condition, can be greatly improved using the rated current of Water-cooling circulating thyristor.But in recent years, with
The fast development of China's extra-high voltage direct-current transmission, electric current is lifted to 6250A by 5000A, voltage class by ± 800kV lifted to
± 1100kV, causes the loss of extra-high voltage direct-current transmission Core equipment converter valve to be substantially improved, and component power density accordingly increases,
Carry out great challenge to the power electric component cooling zone such as thyristor, saturable reactor and damping resistance.
At present, water-cooling pattern there are cooling effectiveness is low, water treatment system is complicated, temperature distributing disproportionation, galvano-cautery fouling with
And caused by leakage a series of problems, such as failure of insulation, it is impossible to the demand of high-capacity direct current power transmission engineering is better met, it is a kind of
More weather conditions operation extra-high voltage direct-current transmission converter valves and its cooling system creativeness (once cool down Phase cooling system
System) and secondary cooling system be combined, primary cooling system is exchanged heat using medium phase transformation is cooled down, in unit volume, list
Under the temperature difference of position, phase-change heat transfer amount is 25 times of water cooling in theory, has heat exchange efficiency higher, volume smaller, dynamic without outside
Power can form the features such as cooling circuit, and then secondary cooling system takes away heat by secondary cooling water and condenser indirect heat exchange
Amount.
The existing research of Phase cooling technology lays particular emphasis on the technical fields such as generator, power tube and GTO inverters, almost
Not to the research in terms of extra-high voltage direct-current transmission change of current valve gear application Phase cooling, more not by Phase cooling technology and two
Secondary cooling system combines the correlative study of utilization, the selection of Phase cooling medium be the key of Phase cooling technology, it is necessary to
Further investigate heatflow characteristics, electrical insulating property, material corrosive properties and environment friendly of Phase cooling medium etc..
Accordingly, it is desirable to provide a kind of technical solution lifts the rated current of thyristor, satisfaction increasingly increases transmission line capability
Use demand.
The content of the invention
In order to overcome the drawbacks described above of the prior art, the present invention proposes following technical solution：One kind is used for extra-high straightening
The cooling system of current transmission valve is flowed, extra-high voltage direct-current transmission converter valve includes：It is composed in series by thyristor converter valve module 13
Converter valve 18；
Direct current transportation cooling system includes：Primary cooling system and secondary cooling system；
Primary cooling system includes：Condenser 8 and the heat-exchanging component being connected with condenser 8；
Secondary cooling system includes：Secondary cooling medium back flow pipe 14, secondary cooling apparatus 15, circulating pump 16 and secondary cold
But media outlet pipe 17.
Circulating pump 16 is equipped with secondary cooling medium back flow pipe 14 between secondary cooling apparatus 15 and condenser 8；
The outlet 17 of the secondary cooling medium of secondary cooling apparatus 15 is connected with the cooling medium inlet of condenser 8.
Change current valve module 13 includes converter valve components；Converter valve components include：Thyristor 1, two arranged on the thyristor 1
The radiator 2 of side, the thyristor press mounting device 12 arranged on 2 both sides of radiator, the damping electricity arranged on the surface of radiator 2 or inside
Resistance 3 and saturable reactor 4；
The both ends of radiator 2 are equipped with inlet and outlet.
Contacting surface between thyristor 1 and radiator 2 scribbles high-efficiency heat conduction material.
Heat-exchanging component includes：Cool down media outlet branch pipe 5, cooling media outlet collecting pipe 6, cooling medium primary outlet pipe 7,
Cool down medium main inlet tube 9, import collecting pipe 10 and entrance branch 11；
The cooling medium is after the outlet of the radiator 2 discharge, through outlet stool 5, outlet collecting pipe 6, the master
Outlet 7 enters the heat exchanger entrance of the condenser 8.
Secondary cooling medium is water, water adds ethylene glycol or water plus nano fluid.
The following components of the material of radiator 2 by mass percentage are made：
Silicon 2~6%, iron 1~3%, copper 5~8%, titanium 1~1.5%, zinc 2-5%, chromium 0.1-0.5%, cerium 0.1~
0.2%；Surplus is aluminium and the impurity of content≤1%.
Contacting surface between thyristor 1 and radiator 3 scribbles Heat Conduction Material made from the following components counted in parts by weight：Paraffin
It is 10-20 parts oily, 3-8 parts of stearic acid, 3-7 parts of zinc dibutyl dithiocarbamate, 15-25 parts of natural rubber, poly dimethyl silicon
7-11 parts of oxygen alkane, is plasticized 4-8 parts of softening agent, 20-30 parts of EP rubbers, 8-12 parts of organosilicon siloxanes, 1-3 parts of accelerating agent.
Circulating pump 16 includes：Pump core 161 in pump case 163 and, arranged on the top pump valve 162 of pump case 163, pump case
163 top is equipped with the air valve 164 for being used for air in release cycle pump.
Circulating pump 16 further includes：Controller and sensor, sensor are located in circulating pump, are electrically connected with the controller；
Air valve 164 is electrically connected with the controller, and controller can control 164 folding of air valve to deflate.
164 external rubber tube of air valve, realizes manual folding, deflates.
Radiator 3 is additionally provided with the temperature sensor of monitoring record converter valve temperature.
Compared with the latest prior art, the present invention has the advantages that：
Phase cooling system (primary cooling system) and secondary cooling system are combined by the 1, the invention, due to
Primary cooling system and secondary cooling system are not direct with secondary cooling water by condenser indirect heat exchange, Phase cooling medium
Contact, can be effectively ensured primary cooling system reliability of operation；
2nd, cooling effectiveness of the invention is high, and Phase cooling system (primary cooling system) is utilized and cooled down in medium phase transition process
The latent heat of vaporization, heat exchanger effectiveness is high, and the key components temperature rise such as thyristor, damping resistance and saturable reactor can be effectively ensured
Low and temperature is uniform, no local hot spot；Since Phase cooling medium condenses heat release in condenser so that secondary cooling medium
It is efficient with condenser indirect heat exchange；
3rd, loss of the invention is small, operational efficiency is high, by cooling down medium phase-change heat transfer, reduce gone in cooling procedure from
The consumption of the materials such as subtree fat；
4th, equipment of the invention is safe for operation, and without hidden danger of catching fire, Phase cooling medium has good insulation under high voltages
Performance, nontoxic, non-combustible, viscosity is low, has good heat endurance, chemical stability and arc extinguishing ability, if fire or production occurs
Raw electric arc, can effectively control the seriousness of accident；
5th, cooling system of the invention is easy to maintain, good economy performance, phase transformation in Phase cooling system (primary cooling system)
Cool down medium circulation power and offer is lost by component thermals such as thyristors, without additionaling power, make whole system self-contained independence
Self-circulation system.
Brief description of the drawings
Fig. 1 is the cooling system schematic diagram of the present invention；
Fig. 2 is the converter valve components schematic diagram of the present invention；
Fig. 3 is the Phase cooling system damping resistance scheme of installation of the present invention；
Fig. 4 is the circulating pump structure diagram of the present invention；
Wherein：1- thyristors, 2- radiators, 3- damping resistances, 4- saturable reactors, 5- outlet stools, 6, outlet confluence
Pipe, 7- primary outlets pipe, 8- condensers, the main inlet tubes of 9-, 10- imports collecting pipe, 11- entrance branch, 12- thyristors press fitting dress
Put, 13- change current valve modules, 14- secondary cooling waters return duct, 15- secondary cooling apparatus, 16- circulating pumps, 17- secondary coolings are situated between
Matter outlet, 18- converter valves, 161- pump cores, 162- pump valves, 163- pump cases, 164- air valves.
Embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings.
As shown in Figure 1, the direct current transportation cooling system of extra-high voltage direct-current transmission converter valve provided by the invention is by extra-high voltage
Direct-current transmission converter valve, Phase cooling system (primary cooling system) and secondary cooling system composition；
Extra-high voltage direct-current transmission converter valve：By thyristor 1, radiator 2, damping resistance 3, saturable reactor 4 and thyristor
The converter valve components that press-loading apparatus 12 is formed, two converter valve components one valve modules 13 of composition, the two of four valve modules compositions
Weight converter valve 18；
Wherein, thyristor 1 is compressed by two module radiators 2 or so, is scribbled between 2 phase-contact surface of thyristor 1 and radiator efficiently
Heat Conduction Material, nine grades of thyristors 1 and radiator 2 are connected, and are compressed by thyristor press mounting device 11, and damping resistance 3 is arranged in scattered
Inside the surface of hot device 2 or insertion radiator 2；
Damping resistance 3 as shown in Figure 2 is cylinder or rectangular parallelepiped structure, and damping resistance 3 is the surface for being attached to radiator 2
Or the inside of insertion radiator 2, damping resistance 3 are cooled down indirectly by the phase transformation of 2 internal cooling medium of radiator；
Radiator 2 is used to cool down thyristor 1, damping resistance 3, direct current equalizing resistance and takes the heater elements such as energy resistance, dissipates
The material of hot device 2 is aluminium alloy 6060T6 (or 6063T6), there is flow passage structure inside it, radiator 2 with 1 contact surface of thyristor
There are location hole, radiator 2 has an import and one outlet for heart position, and import is located at the lower section of radiator 2, and outlet is positioned at scattered
The top of hot device 2.
Phase cooling system (primary cooling system)：By outlet stool 5, outlet collecting pipe 6, primary outlet pipe 7, condenser 8,
Main inlet tube 9, import collecting pipe 10, entrance branch 11 form；
Wherein, condenser 8 is arranged in the top of converter valve 18, and condenser 8 is by primary outlet pipe 7 and main inlet tube 9 with changing
Flow valve module 13 and form Phase cooling flow of media circuit；
The outlet of radiator 2 is connected by outlet stool 5, outlet collecting pipe 6 and primary outlet pipe 7 with the import of condenser 8；
Heat sink inlet is connected by main inlet tube 9, import collecting pipe 10 and entrance branch 11 with condenser 8；
Condenser 8 is arranged in the top of converter valve 18, and the import of condenser 8 is located at condenser upper left side and upper right side, condenses
The outlet of device 8 is located at condenser bottom, there is the pipeline structure needed for the condensation of high temperature gas-liquid mixture inside condenser 8；Condenser 8
Voltage stabilizing function with variable volume, variable volume necessary to condenser 8 is the steam that boiling cooling produces under most harsh conditions
Volume shared by gas with it is non-loaded when cool down media fluid body as caused by changing minimum temperature to maximum temperature (boiling point)
The sum of product expansion, then part space remaining during liquid filling is subtracted, the top of condenser 8 is equipped with air bleeding valve.
Secondary cooling system：It is situated between by secondary cooling water return duct 14, secondary cooling apparatus 15, circulating pump 16 and secondary cooling
Matter outlet 17 forms；
Secondary cooling apparatus 15 is located at the outside in the 18 place valve Room of converter valve, secondary cooling apparatus 15 by closed cooling tower or
Closed cooling tower series connection aerial cooler composition, secondary cooling apparatus 18 pass through secondary cooling media outlet pipe 17, circulating pump 16
And secondary cooling water return duct 14 is connected with condenser 8.
Liquid flow process in extra-high voltage direct-current transmission converter valve：Thyristor 1, damping resistance 3 and saturable reactor 4 are not sent out
When hot, due to being filled with cooling medium in radiator 2, the pressure in radiator 2 is kept constant at this time；When thyristor 1, damping
When resistance 3 and saturable reactor 4 produce heat load, the gas-liquid mixture produced in radiator 2 is being subject to since density contrast is led
The buoyancy lift effect of cause is lower to be risen, into condenser 8 in be condensed into liquid, when the grade heater element of thyristor 1 is changed into from there is heat to carry
During without heat load, cooling media fluid full of radiator 2 and can satisfy from condenser 8 by main inlet tube 9 and import collecting pipe 10
With reactor 4, the gaseous cooling medium in radiator 2 and saturable reactor 4 can be eliminated in time, therefore in Phase cooling system
In, since condenser 8 has pressure regulating power, no matter whetheing there is heat load, can ensure to cool down medium under a constant
Phase cooling.
Liquid flow process in secondary cooling system：The heat of high temperature gas-liquid mixture condensation release in condenser 8 leads to
Cross with secondary cooling water indirect heat exchange, secondary cooling coolant-temperature gage rise after flowed by secondary cooling water return pipe 14, by circulating
Enter after the pressurization of pump 16 in secondary cooling apparatus 18 and heat is scattered in ambient temperature, the secondary cooling water after being cooled leads to
Cross secondary cooling media outlet pipe 17 to enter in condenser 8, form secondary cooling system circuit.
Converter valve components are connected as case study on implementation by nine grades of thyristors 1 in the present invention, as caused by adjusting 1 quantity of thyristor
Structure change, it is also within the scope of the invention；Wherein double converter valve 18 is made of four valve modules, and valve module is changed by two
Stream valve module 13 is configured to case study on implementation, and the valve module number change according to caused by converter valve bears voltage class change, also exists
Within the scope of the invention；Wherein secondary cooling medium is also case study on implementation using water, can also use water+ethylene glycol or water+
Nano-fluid etc. cools down medium.
The following components of the material of radiator 2 by mass percentage are made：
Silicon 2~6%, iron 1~3%, copper 5~8%, titanium 1~1.5%, zinc 2-5%, chromium 0.1-0.5%, cerium 0.1~
0.2%；Surplus is the impurity of aluminium and content≤1%,
Surface cold shut, the crackle of the radiator as made from above-mentioned material are reduced, and good percentage elongation, improves elongation and impact tough
Property.
Contacting surface between thyristor 1 and radiator 3 scribbles Heat Conduction Material made from the following components counted in parts by weight：Paraffin
It is 10-20 parts oily, 3-8 parts of stearic acid, 3-7 parts of zinc dibutyl dithiocarbamate, 15-25 parts of natural rubber, poly dimethyl silicon
7-11 parts of oxygen alkane, is plasticized 4-8 parts of softening agent, 20-30 parts of EP rubbers, 8-12 parts of organosilicon siloxanes, 1-3 parts of accelerating agent.
Circulating pump as shown in Figure 4, including：Pump core 161, pump valve 162 and pump case 163, pump core 161 are located in pump case 163,
Pump valve 162 is located at 163 top of pump case, is connected through pump case 163 with pump core 161, and 163 top of pump case, which is equipped with, is used for release cycle pump
The air valve 164 of interior air.
Circulating pump further includes controller and sensor, and the sensor is located in circulating pump, is electrically connected with the controller；Air valve
164 are electrically connected with the controller, and controller can control 164 folding of air valve to deflate.Air valve 164 is circumscribed with rubber tube, can realize
Manual folding, deflates.
Air valve 164 is opened up on the pump case 163 of circulating pump, realizes the safety with air pocket in pipeline in the circulating pump pump housing
Discharge, solves circulating pump existing safety problem during the work time, avoids because air fails to make emptying in circulating pump
Into air sinuses, the production problem such as oxygenation, improve production efficiency.
Finally it should be noted that：The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof, to the greatest extent
Pipe is described in detail the present invention with reference to above-described embodiment, those of ordinary skills in the art should understand that：Still
Can be to the embodiment technical scheme is modified or replaced equivalently of the present invention, and without departing from any of spirit and scope of the invention
Modification or equivalent substitution, it should all cover among scope of the presently claimed invention.
Claims (12)
1. a kind of cooling system for extra-high voltage direct-current transmission converter valve, it is characterised in that the extra-high voltage direct-current transmission changes
Stream valve includes：The converter valve (18) being composed in series by thyristor converter valve module (13)；
The direct current transportation cooling system includes：Primary cooling system and secondary cooling system；
The primary cooling system includes：Condenser (8) and its set heat-exchanging component；
The secondary cooling system includes：Secondary cooling medium back flow pipe (14), secondary cooling apparatus (15) and its set change
Hot device, circulating pump (16) and secondary cooling media outlet pipe (17).
2. cooling system according to claim 1, it is characterised in that,
The secondary cooling medium back flow pipe (14) between the secondary cooling apparatus (15) and the condenser (8) is equipped with described
Circulating pump (16)；
The outlet (17) and the cooling medium of the condenser (8) of the secondary cooling medium of the secondary cooling apparatus (15) enter
Mouth is connected.
3. cooling system according to claim 1, it is characterised in that, the change current valve module (13) includes change of current valve group
Part；
The converter valve components include：Thyristor (1), the radiator (2) arranged on the both sides of the thyristor (1), arranged on described
The thyristor press mounting device (12) of radiator (2) both sides be arranged on the radiator (2) surface or inside damping resistance (3) and
Saturable reactor (4)；
The both ends of the radiator (2) are equipped with inlet and outlet.
4. cooling system according to claim 3, it is characterised in that, between the thyristor (1) and the radiator (2)
Contacting surface scribbles high-efficiency heat conduction material.
5. cooling system according to claim 1, it is characterised in that cooling down the heat exchange unit of the radiator (2) includes：
Cool down media outlet branch pipe (5), cooling media outlet collecting pipe (6), cooling medium primary outlet pipe (7), the cooling main import of medium
Manage (9), import collecting pipe (10) and entrance branch (11)；
The cooling medium is after the radiator (2) discharge, through the outlet stool (5), the outlet collecting pipe (6), institute
State primary outlet pipe (7) and enter the condenser (8).
6. cooling system according to claim 5, it is characterised in that the secondary cooling medium is water, water adds ethylene glycol,
Or water plus nano fluid.
7. cooling system according to claim 3, it is characterised in that, the material of the radiator (2) is by mass percentage
Following components of meter are made：
Silicon 2~6%, iron 1~3%, copper 5~8%, titanium 1~1.5%, zinc 2-5%, chromium 0.1-0.5%, cerium 0.1~0.2%；It is remaining
Measure the impurity for aluminium and content≤1%.
8. cooling system according to claim 4, it is characterised in that, touching between the IGBT (1) and the radiator (3)
Face scribbles Heat Conduction Material made from the following components counted in parts by weight：10-20 parts of paraffin oil, 3-8 parts of stearic acid, dibutyl two
3-7 parts of zinc thiocarbamate, 15-25 parts of natural rubber, 7-11 parts of dimethyl silicone polymer, is plasticized 4-8 parts of softening agent, second third
20-30 parts of rubber, 8-12 parts of organosilicon siloxanes, 1-3 parts of accelerating agent.
9. cooling system according to claim 1, it is characterised in that, the circulating pump (16) includes：
Pump core (161) in pump case (163) and, arranged on the top pump valve (162) of the pump case (163), the pump case
(163) top is equipped with the air valve (164) for being used for air in release cycle pump.
10. cooling system according to claim 10, it is characterised in that the circulating pump (16) further includes：Controller and
Sensor, the sensor are located in circulating pump, are electrically connected with the controller；
The air valve (164) is electrically connected with the controller, and the controller can control air valve (164) folding to deflate.
11. cooling system according to claim 11, it is characterised in that the external rubber tube of the air valve (164), realizes hand
Dynamic folding, deflates.
12. cooling system according to claim 3, it is characterised in that the radiator (3) is additionally provided with described in monitoring record
The temperature sensor of converter valve temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610885264.9A CN107920450A (en) | 2016-10-10 | 2016-10-10 | A kind of cooling system for extra-high voltage direct-current transmission converter valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610885264.9A CN107920450A (en) | 2016-10-10 | 2016-10-10 | A kind of cooling system for extra-high voltage direct-current transmission converter valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107920450A true CN107920450A (en) | 2018-04-17 |
Family
ID=61892479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610885264.9A Pending CN107920450A (en) | 2016-10-10 | 2016-10-10 | A kind of cooling system for extra-high voltage direct-current transmission converter valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107920450A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112218491A (en) * | 2020-09-28 | 2021-01-12 | 西安交通大学 | Energy-saving converter station internal system |
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| CN203516201U (en) * | 2013-09-25 | 2014-04-02 | 陕西科技大学 | Improved circulating pump |
| CN104212074A (en) * | 2014-08-27 | 2014-12-17 | 青岛承天伟业机械制造有限公司 | High-performance heat conduction material |
| CN206650968U (en) * | 2016-10-10 | 2017-11-17 | 南京南瑞集团公司 | A kind of cooling system for extra-high voltage direct-current transmission converter valve |
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2016
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006169290A (en) * | 2004-12-13 | 2006-06-29 | Asahi Glass Co Ltd | Secondary circulating and cooling system |
| JP2009014318A (en) * | 2007-07-09 | 2009-01-22 | Ntt Facilities Inc | Air conditioning system and its operating method |
| CN101562158A (en) * | 2009-06-02 | 2009-10-21 | 中国电力科学研究院 | Heat removal system for high-power semiconductor device |
| CN102570480A (en) * | 2012-02-02 | 2012-07-11 | 中国科学院电工研究所 | Evaporating and cooling system of reactive power compensation device |
| CN203516201U (en) * | 2013-09-25 | 2014-04-02 | 陕西科技大学 | Improved circulating pump |
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| CN206650968U (en) * | 2016-10-10 | 2017-11-17 | 南京南瑞集团公司 | A kind of cooling system for extra-high voltage direct-current transmission converter valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112218491A (en) * | 2020-09-28 | 2021-01-12 | 西安交通大学 | Energy-saving converter station internal system |
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