CN111918522A - Converter station cooling system - Google Patents
Converter station cooling system Download PDFInfo
- Publication number
- CN111918522A CN111918522A CN202010564228.9A CN202010564228A CN111918522A CN 111918522 A CN111918522 A CN 111918522A CN 202010564228 A CN202010564228 A CN 202010564228A CN 111918522 A CN111918522 A CN 111918522A
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- Prior art keywords
- cooling system
- water
- cooling
- cooling tower
- converter station
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 223
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 117
- 239000007921 spray Substances 0.000 claims abstract description 44
- 238000005507 spraying Methods 0.000 claims description 10
- 230000017525 heat dissipation Effects 0.000 claims description 8
- 239000010724 circulating oil Substances 0.000 claims description 7
- 238000001704 evaporation Methods 0.000 claims description 5
- 230000008020 evaporation Effects 0.000 claims description 5
- 238000007664 blowing Methods 0.000 claims description 3
- 230000008929 regeneration Effects 0.000 claims description 3
- 238000011069 regeneration method Methods 0.000 claims description 3
- 238000009834 vaporization Methods 0.000 claims description 3
- 230000008016 vaporization Effects 0.000 claims description 3
- 238000011001 backwashing Methods 0.000 claims description 2
- 239000010865 sewage Substances 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 6
- 238000013461 design Methods 0.000 abstract description 6
- 238000011161 development Methods 0.000 abstract description 5
- 239000012530 fluid Substances 0.000 description 5
- 230000018109 developmental process Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/16—Water cooling
-
- 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
-
- 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
- H05K7/20927—Liquid coolant without phase change
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
The invention discloses a converter station cooling system, which comprises: a first internal cooling system, a second internal cooling system and an external cooling system; the external cooling system comprises a first cooling tower, a second cooling tower and a spray water system; the converter valve is circularly connected with the first internal cooling system, the first internal cooling system is circularly connected with the first cooling tower, and the first cooling tower is circularly connected with the spray water system; the transformer is circularly connected with the second internal cooling system, the second internal cooling system is circularly connected with the second cooling tower, and the second cooling tower is circularly connected with the spray water system. By implementing the embodiment of the invention, the integrated design of the converter valve and the external cooling system of the transformer can be realized, the construction cost and the floor area of the cooling system of the converter station are effectively reduced, and the development concept of the green converter station is met.
Description
Technical Field
The invention relates to the technical field of direct current transmission, in particular to a converter station cooling system.
Background
In the technical field of high-voltage direct-current transmission systems, a direct-current converter station plays a crucial role in realizing alternating-current and direct-current electric energy conversion. The main equipment of the converter station comprises converter valves, transformers, etc. And heat generated by power electronic components of each device in the converter station in the electric energy conversion process is subjected to heat exchange through a cooling system.
In the prior art, converter valves and transformers in a dc converter station are each provided with a set of internal and external cooling systems. The external cooling system of the converter valve generally adopts a closed cooling tower scheme, and the external cooling system of the transformer generally adopts an air cooler scheme. However, in the process of implementing the invention, the inventor finds that the prior art has at least the following problems: in consideration of the practical problems of site selection of the converter valve and the transformer and the like, the situation that an external cooling system of the transformer is not suitable for adopting an air cooler scheme may exist, and the external cooling system of the transformer needs to be changed into a closed cooling tower scheme. At the moment, because the converter valve and the transformer are respectively provided with a set of independent cooling system, the construction cost and the floor area of the cooling system of the converter station are increased, and the comprehensive management and the operation maintenance of the converter station are not facilitated.
Disclosure of Invention
The embodiment of the invention aims to provide a converter station cooling system, which can realize the integrated design of an external cooling system of a converter valve and a transformer, effectively reduce the construction cost and the floor area of the converter station cooling system and accord with the development concept of a green converter station.
To achieve the above object, an embodiment of the present invention provides a converter station cooling system, including: a first internal cooling system, a second internal cooling system and an external cooling system; the external cooling system comprises a first cooling tower, a second cooling tower and a spray water system; wherein the content of the first and second substances,
the converter valve is circularly connected with the first internal cooling system, the first internal cooling system is circularly connected with the first cooling tower, and the first cooling tower is circularly connected with the spray water system;
the transformer is circularly connected with the second internal cooling system, the second internal cooling system is circularly connected with the second cooling tower, and the second cooling tower is circularly connected with the spray water system.
As an improvement of the scheme, the maximum supplementary water amount of the spraying water system is Q;
wherein Q is Q1+Q2+Q3+Q4；Q1The evaporation water amount of the spraying water system; q2For the water loss in the sewage discharge of the spray water system, Q3The total amount of water lost by wind blowing of the first cooling tower and the second cooling tower is calculated; q4The water consumption for the forward backwashing and the regeneration of the spray water system.
As an improvement of the scheme, the maximum supplementary water amount of the spraying water system is Q;
wherein Q is 80%. times.Q1；
Q1The evaporation water amount of the spraying water system; p1The rated heat dissipation power of the converter valve is obtained; p2The rated heat dissipation power of the transformer is obtained; latent heat of vaporization for water.
As an improvement of the above solution, the first internal cooling system is a circulating water cooling system.
The improvement of the scheme is characterized in that the second internal cooling system consists of a circulating oil cooling system and a plate heat exchanger water cooling system;
the transformer is circularly connected with the circulating oil cooling system, and the water cooling system of the plate heat exchanger is circularly connected with the second cooling tower.
As an improvement of the above solution, it is characterized in that the first cooling tower is a closed cooling tower.
As an improvement of the above, the second cooling tower is a closed cooling tower.
Compared with the prior art, the cooling system of the converter station disclosed by the invention comprises a first internal cooling system, a second internal cooling system and an external cooling system; the converter valve is in circulating connection with the first internal cooling system, and the first internal cooling system is in circulating connection with the external cooling system; the transformer is circularly connected with the second internal cooling system, and the second internal cooling system is circularly connected with the external cooling system. In the external cooling system of the direct current converter station, the spray water system in the external cooling system of the converter valve equipment and the transformer equipment is shared, so that the integrated design of the external cooling system of the converter valve equipment and the transformer equipment is realized, the construction cost of the cooling system of the converter station can be effectively reduced, the overall floor area of the cooling system of the converter station is reduced, the operation maintenance and the comprehensive management of the converter station are facilitated, and the development concept of a green converter station is met.
Drawings
Fig. 1 is a schematic structural diagram of a first converter station cooling system according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a second converter station cooling system according to a second embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a schematic structural diagram of a first converter station cooling system according to a first embodiment of the present invention is shown. A converter station cooling system 10 provided in an embodiment of the present invention includes: a first internal cooling system 11, a second internal cooling system 12 and an external cooling system 13.
In an embodiment of the invention, the converter station cooling system comprises a first internal cooling system 11, a second internal cooling system 12 and an external cooling system 13. Said first internal cooling system 11 is configured as an internal cooling system of a converter valve system within a converter station, heat generated by converter valve equipment losses being exchanged for heat by the first internal cooling system 11. Said second internal cooling system 12 is configured as an internal cooling system for transformer equipment in the converter station, heat generated by transformer equipment losses being exchanged by the second internal cooling system 12. And the temperature reduction of the working fluid in the first internal cooling system 11 and the second internal cooling system 12 is realized by the external cooling system 13.
Specifically, the external cooling system 13 includes a first cooling tower 131, a second cooling tower 132, and a shower water system 133. The converter valve is circularly connected with the first internal cooling system 11, the first internal cooling system 11 is circularly connected with the first cooling tower 131, and the first cooling tower 131 is circularly connected with the spray water system 133. The transformer is circularly connected with the second internal cooling system 12, the second internal cooling system 12 is circularly connected with the second cooling tower 132, and the second cooling tower 132 is circularly connected with the spray water system 133.
Preferably, the first cooling tower is a closed cooling tower; the second cooling tower is a closed cooling tower.
In the embodiment of the present invention, the external cooling system of the converter valve adopts the existing closed cooling tower scheme, and the first cooling tower 131 exchanges heat with the first internal cooling system 11, so as to cool the working fluid of the first internal cooling system 11. The external cooling system of the transformer also adopts a closed cooling tower scheme, and the second cooling tower 132 exchanges heat with the second internal cooling system 12 to cool the working fluid of the second internal cooling system 12. Meanwhile, points with fewer interfaces with other structures in the external cooling system are selected, that is, the spray water system 133 is designed integrally, the spray water systems in the external cooling systems of the flow valve device and the transformer device are shared, and the same spray water system 133 provides spray water make-up water for the first closed cooling tower and the second closed cooling tower.
Specifically, the working principle of the external cooling system is as follows: a working fluid (water or other liquid) is circulated within the coils of the closed cooling tower 131 or 132, and the heat of the working fluid is dissipated through the coils into the water flowing through the coils. Meanwhile, air around the tower enters from the air inlet grille, flows in the direction opposite to the flowing direction of water and flows upwards through the coil pipe. The hot humid air is discharged into the surrounding atmosphere by a ventilator. The remaining water falls into the bottom water tray, is recirculated by the spray pump package to the spray water system 133, and is sprayed back onto the coil. This is repeated.
Further, since the spray water systems 133 in the converter valve equipment and the transformer equipment are integrally designed, in practical application, the maximum makeup water amount of the spray water systems needs to be recalculated to meet the supply of the spray water makeup water to the two closed cooling towers.
In one embodiment, the amount of evaporated water Q of the spray water system is obtained by collecting or calculating1And the pollution discharge loss water quantity Q of the spraying water system2The total amount Q of water lost by blowing of the first cooling tower and the second cooling tower3And the water consumption Q of the forward and reverse washing and regeneration of the spray water system4Calculating the maximum supplementary water quantity Q of the spraying water system by the following calculation formula:
Q＝Q1+Q2+Q3+Q4。
in another embodiment, the evaporation water quantity Q of the spraying water system can be obtained according to the prior knowledge1The water quantity of the converter valve is about 80% of the maximum supplementary water quantity Q of the spray water system, so that the rated heat dissipation power P of the converter valve is obtained1And rated heat dissipation power P of the transformer2Calculating the maximum supplementary water quantity of the spraying water system to be Q through the following calculation formula:
wherein the heat of vaporization of water is 2260kJ/kg ℃.
By adopting the technical means of the embodiment of the invention, in the converter station external cooling system, as the interfaces of the spray water system 133 and other nodes are less, the spray water systems in the converter valve equipment and the external cooling system of the transformer equipment are shared, and the same spray water system 133 is adopted to provide spray water supplementing water for the first closed cooling tower and the second closed cooling tower, so that the external cooling system is convenient to build and implement in practical application, and has greater practicability, thereby realizing the integrated design of the converter valve equipment and the external cooling system of the transformer equipment, effectively reducing the construction cost and the floor area of the converter station cooling system, facilitating the operation maintenance and the comprehensive management of the converter station, and conforming to the development concept of the green converter station. Simultaneously, will the outer cooling system design of transformer is closed cooling tower scheme, can also further improve the noise that current air cooler scheme brought and the great problem of area.
Referring to fig. 2, a schematic structural diagram of a second converter station cooling system according to a second embodiment of the present invention is shown as a preferred implementation manner. On the basis of the first embodiment, the converter station cooling system 20 according to the second embodiment of the present invention includes: a first internal cooling system 21, a second internal cooling system 22 and an external cooling system 23. The external cooling system 23 includes a first cooling tower 231, a second cooling tower 232, and a shower water system 233.
The converter valve is circularly connected with the first internal cooling system 21, the first internal cooling system 21 is circularly connected with the first cooling tower 231, and the first cooling tower 231 is circularly connected with the spray water system 233. The transformer is circularly connected with the second internal cooling system 22, the second internal cooling system 22 is circularly connected with the second cooling tower 232, and the second cooling tower 232 is circularly connected with the spray water system 233.
The first cooling tower 231 and the second cooling tower 232 are both closed cooling towers, and the first internal cooling system 21 is a circulating water cooling system. The second internal cooling system 22 consists of a circulating oil cooling system 221 and a plate heat exchanger water cooling system 222. The transformer is circularly connected with the circulating oil cooling system, and the water cooling system of the plate heat exchanger is circularly connected with the second cooling tower.
In the embodiment of the invention, the circulating water cooling system 21 of the converter valve sends cooled pure water to the valve plate radiator to take away heat generated by the valve plates, the heated pure water is pumped into the heat dissipation coil outside the valve hall to dissipate heat, cool and cool, and the cooled pure water is sent to the valve plate radiator again, and the process is repeated in a circulating manner. And the closed cooling tower 231 and the spray water system 233 in the external cooling system 23 mainly function to remove heat of the pure water in the circulating water cooling system 21. The water in the closed cooling tower 231 circulates in the heat dissipation coil, and the heat of the pure water in the circulating water cooling system 21 is dissipated into the water flowing through the coil of the closed cooling tower 231. Meanwhile, air around the tower enters from the air inlet grille, flows in the direction opposite to the flowing direction of water and flows upwards through the coil pipe. Part of the water is evaporated to take away the heat. The hot humid air is discharged into the surrounding atmosphere by a ventilator. The remaining water falls into the bottom water tray, is recirculated to the spray water system 233 by the spray pump package, and is sprayed back onto the coil. The operation is repeated in a circulating way.
In the embodiment of the present invention, the circulating oil cooling system 221 of the transformer sends cold oil to the transformer equipment to take away heat generated by the transformer equipment, the heated hot oil exchanges heat with cold water in the water cooling system 222 of the plate heat exchanger, and the cooled cold oil cools the transformer again, and the above steps are repeated in a circulating manner. And the heated hot water in the plate heat exchanger water cooling system 222 is cooled by the closed cooling tower 332 and the spray water system 233. The working principle of the closed cooling tower 232 and the spray water system 233 is as described in the above embodiments, and will not be described herein.
The embodiment of the invention provides a converter station cooling system, in an external cooling system, as the spray water system 233 has fewer interfaces with other nodes, the same spray water system 233 is adopted to provide spray water make-up water for a first closed cooling tower and a second closed cooling tower, so that the external cooling system is convenient to build and implement in practical application, and has greater practicability, thereby realizing the integrated design of the external cooling system of converter valve equipment and transformer equipment, effectively reducing the construction cost and the floor area of the converter station cooling system, facilitating the operation maintenance and the comprehensive management of the converter station, and conforming to the development concept of a green converter station. Meanwhile, an external cooling system of the transformer equipment in the converter station is designed to be a closed cooling tower scheme, and the problems of noise and large occupied area caused by the existing air cooler scheme can be further improved.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (7)
1. A converter station cooling system, comprising: a first internal cooling system, a second internal cooling system and an external cooling system; the external cooling system comprises a first cooling tower, a second cooling tower and a spray water system; wherein the content of the first and second substances,
the converter valve is circularly connected with the first internal cooling system, the first internal cooling system is circularly connected with the first cooling tower, and the first cooling tower is circularly connected with the spray water system;
the transformer is circularly connected with the second internal cooling system, the second internal cooling system is circularly connected with the second cooling tower, and the second cooling tower is circularly connected with the spray water system.
2. The converter station cooling system of claim 1, wherein the maximum makeup water volume of the spray water system is Q;
wherein Q is Q1+Q2+Q3+Q4；Q1The evaporation water amount of the spraying water system; q2For the water loss in the sewage discharge of the spray water system, Q3The total amount of water lost by wind blowing of the first cooling tower and the second cooling tower is calculated; q4The water consumption for the forward backwashing and the regeneration of the spray water system.
3. The converter station cooling system of claim 1, wherein the maximum makeup water volume of the spray water system is Q;
wherein Q is 80%. times.Q1；
Q1The evaporation water amount of the spraying water system; p1The rated heat dissipation power of the converter valve is obtained; p2The rated heat dissipation power of the transformer is obtained; latent heat of vaporization for water.
4. A converter station cooling system according to any of claims 1 to 3, characterized in that said first internal cooling system is a circulating water cooling system.
5. A converter station cooling system according to any of the claims 1 to 3, characterized in that said second internal cooling system consists of a circulating oil cooling system and a plate heat exchanger water cooling system;
the transformer is circularly connected with the circulating oil cooling system, and the water cooling system of the plate heat exchanger is circularly connected with the second cooling tower.
6. A converter station cooling system according to any of claims 1-3, characterized in that said first cooling tower is a closed cooling tower.
7. A converter station cooling system according to any of claims 1-3, characterized in that said second cooling tower is a closed cooling tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010564228.9A CN111918522A (en) | 2020-06-19 | 2020-06-19 | Converter station cooling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010564228.9A CN111918522A (en) | 2020-06-19 | 2020-06-19 | Converter station cooling system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111918522A true CN111918522A (en) | 2020-11-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010564228.9A Pending CN111918522A (en) | 2020-06-19 | 2020-06-19 | Converter station cooling system |
Country Status (1)
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| CN (1) | CN111918522A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114242401A (en) * | 2021-10-26 | 2022-03-25 | 保定天威保变电气股份有限公司 | Arrangement system of inner-cooling circulating water cooling type flexible-direct transformer |
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