CN107424754B - Transformer cooling system of offshore transformer substation - Google Patents
Transformer cooling system of offshore transformer substation Download PDFInfo
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- CN107424754B CN107424754B CN201710812550.7A CN201710812550A CN107424754B CN 107424754 B CN107424754 B CN 107424754B CN 201710812550 A CN201710812550 A CN 201710812550A CN 107424754 B CN107424754 B CN 107424754B
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- seawater
- cooler
- fresh water
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- 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
- H01F27/105—Cooling by special liquid or by liquid of particular composition
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- 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
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- 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
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
-
- 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
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
- H01F2027/404—Protective devices specially adapted for fluid filled transformers
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- 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
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
- H01F2027/406—Temperature sensor or protection
Abstract
The invention discloses a transformer cooling system of an offshore substation, which comprises a cooling device, a transformer, a first seawater pipe, a second seawater pipe, a first seawater discharge pipe, a second seawater discharge pipe and a pressure gauge, wherein the cooling device comprises a first seawater cooler, a second seawater cooler and a fresh water cooler; the seawater inlet of the first seawater cooler is communicated with the water outlet of the first seawater pipe, the seawater outlet of the first seawater cooler is communicated with the water inlet of the first row of seawater pipes, the fresh water inlet of the first seawater cooler is communicated with the fresh water outlet of the fresh water cooler, and the fresh water outlet of the first seawater cooler is communicated with the fresh water inlet of the fresh water cooler. According to the offshore transformer substation transformer cooling system, the seawater cooler is arranged in a one-by-one mode, so that the seawater cooler can work normally and stably for a long time, the cooling efficiency of the cooling device is improved, the reliability of the transformer is improved, the stability of power transmission and transmission is ensured, and the economic benefit of an owner is improved.
Description
Technical Field
The invention relates to the field of offshore wind power development and construction, in particular to a transformer cooling system of an offshore substation.
Background
Offshore wind power generation is a new direction of global energy development, but the marine climate environment brings a lot of technical problems for the construction of offshore substations. Salt mist and water vapor in the air on the sea have strong corrosiveness on equipment in the transformer substation, so that the service life of the equipment is influenced. In order to solve the problem of corrosion of salt mist to equipment, an offshore substation usually adopts a closed design, and high-voltage equipment is arranged in a closed space, so that for a substation transformer with large heat dissipation capacity, the technical problem to be solved at present is to improve the cooling efficiency of (a radiator of) the transformer.
At present, oil cooling is adopted for cooling a transformer of a traditional offshore transformer substation, and cooling oil is cooled by blowing outdoor heat radiators through outdoor natural wind. This kind of conventional natural air cooling mode is influenced by outdoor weather greatly, has seriously influenced (the radiator of) the cooling efficiency of transformer. Some technical schemes also adopt a mode of cooling transformer cooling oil by fresh water and a mode of cooling a fresh water cooling water tank by seawater (soaking the fresh water cooling water tank in the seawater). But adopt fresh water cooling transformer cooling oil, the scheme of sea water cooling fresh water cooling tank (with fresh water cooling tank bubble in the sea water), the long-time static bubble of water tank can make the water tank outside breed the marine organism rapidly in the sea to make the heat exchange efficiency of water tank reduce, cooling efficiency reduces, leads to the maintenance frequent, makes the reliability of transformer reduce, influences the stability of power transmission, and then influences owner's economic benefits.
Disclosure of Invention
In order to solve the technical problem of low cooling efficiency of the transformer of the offshore transformer substation, the invention provides the transformer cooling system of the offshore transformer substation, which can effectively improve the cooling efficiency of the transformer of the offshore transformer substation.
In order to achieve the purpose, the transformer cooling system of the offshore transformer substation comprises a cooling device, a transformer, a first seawater pipe, a second seawater pipe, a first seawater discharge pipe, a second seawater discharge pipe and a pressure gauge, wherein the cooling device comprises a first seawater cooler, a second seawater cooler and a fresh water cooler;
the first seawater cooler and the second seawater cooler respectively comprise a seawater inlet, a fresh water inlet, a seawater outlet and a fresh water outlet;
the fresh water cooler comprises a fresh water inlet, an oil inlet, a fresh water outlet and an oil outlet;
the seawater inlet of the first seawater cooler is communicated with the water outlet of the first seawater pipe, the seawater outlet of the first seawater cooler is communicated with the water inlet of the first seawater discharge pipe, the fresh water inlet of the first seawater cooler is communicated with the fresh water outlet of the fresh water cooler, and the fresh water outlet of the first seawater cooler is communicated with the fresh water inlet of the fresh water cooler;
the seawater inlet of the second seawater cooler is communicated with the water outlet of the second seawater pipe, the seawater outlet of the second seawater cooler is communicated with the water inlet of the second sea drainage pipe, the fresh water inlet of the second seawater cooler is communicated with the fresh water outlet of the fresh water cooler, and the fresh water outlet of the second seawater cooler is communicated with the fresh water inlet of the fresh water cooler;
the pressure gauges are arranged at the seawater inlet and the seawater outlet of the first seawater cooler and the second seawater cooler;
the oil inlet of the fresh water cooler is communicated with the oil outlet of the transformer, and the oil outlet of the fresh water cooler is communicated with the oil inlet of the transformer.
The water inlet of the cooling water pump is respectively communicated with the fresh water outlet of the first seawater cooler and the fresh water outlet of the second seawater cooler, and the water outlet of the cooling water pump is communicated with the fresh water inlet of the fresh water cooler;
an oil inlet of the cooling oil pump is communicated with an oil outlet of the transformer, and an oil outlet of the cooling oil pump is communicated with an oil inlet of the fresh water cooler.
Further, still include first immersible pump, first anti-marine life device, the water inlet of first anti-marine life device with the delivery port intercommunication of first immersible pump, the delivery port of first anti-marine life device with the water inlet intercommunication of first sea water pipe, the delivery port of first anti-marine life device still with the water inlet intercommunication of second sea water pipe.
Further, the marine life-preventing device comprises a second submersible pump and a second marine life-preventing device, wherein the water inlet of the second marine life-preventing device is communicated with the water outlet of the second submersible pump, the water outlet of the second marine life-preventing device is communicated with the water inlet of the second seawater pipe, and the water outlet of the second marine life-preventing device is also communicated with the water inlet of the first seawater pipe.
Further, the fresh water cooler also comprises a water tank for supplementing fresh water in the fresh water cooler, and a water outlet of the water tank is communicated with a fresh water inlet of the cooling water pump.
The fresh water cooler is characterized by further comprising a three-way temperature control valve, wherein one oil inlet of the three-way temperature control valve is communicated with the oil outlet of the fresh water cooler, the other oil inlet of the three-way temperature control valve is communicated with the oil outlet of the transformer, and the oil outlet of the three-way temperature control valve is communicated with the oil inlet of the transformer.
Further, a liquid level alarm is arranged on the water tank.
Furthermore, a liquid level alarm and a temperature alarm are arranged on the transformer.
The transformer cooling system of the offshore substation provided by the invention has the following technical effects:
because the scheme of cooling oil by the fresh water cooling transformer and cooling fresh water by seawater is adopted, the first seawater cooler and the second seawater cooler are arranged in a one-by-one mode: under normal operating condition, one seawater cooler works, and the other seawater cooler is standby, so when the working seawater cooler blocks the cooler due to the tiny dirt mixed in the seawater, so that the pressure difference between the inlet and the outlet of the cooler exceeds the set range, the inlet and the outlet of the working seawater cooler are automatically closed, and meanwhile, the inlet and the outlet of the standby seawater cooler are automatically opened to enter the operating condition, thereby ensuring that the seawater cooler can normally and stably work for a long time, improving the cooling efficiency of a cooling device, further improving the reliability of a transformer, ensuring the stability of power transmission and increasing the economic benefit of an owner.
Drawings
FIG. 1 is a simplified schematic structural diagram of an offshore substation transformer cooling system of the present invention;
the system comprises a first submersible pump 1; 2. a first marine growth prevention device; 3. a first seawater pipe; 4. a first seawater cooler; 5. a first row of marine pipes; 6. a second submersible pump; 7. a second marine growth prevention device; 8. a second seawater pipe; 9. a second seawater cooler; 10. a second sea chest; 11. a pressure gauge; 12. a cooling water pump; 13. a fresh water cooler; 14. a water tank; 15. a three-way temperature control valve; 16. cooling the oil pump; 17. a transformer; 18. a liquid level alarm; 19. and a temperature alarm.
Detailed Description
The following detailed description of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
As shown in fig. 1, the transformer cooling system of the offshore substation according to the embodiment includes a cooling device, a transformer 17, a first seawater pipe 3, a second seawater pipe 8, a first discharging seawater pipe 5, a second discharging seawater pipe 10, and a pressure gauge 11, where the cooling device includes a first seawater cooler 4, a second seawater cooler 9, and a fresh water cooler 13;
the first seawater cooler 4 and the second seawater cooler 9 respectively comprise a seawater inlet, a fresh water inlet, a seawater outlet and a fresh water outlet;
the fresh water cooler 13 comprises a fresh water inlet, an oil inlet, a fresh water outlet and an oil outlet;
a seawater inlet of the first seawater cooler 4 is communicated with a water outlet of the first seawater pipe 3, a seawater outlet of the first seawater cooler 4 is communicated with a water inlet of the first seawater exhaust pipe 5, a fresh water inlet of the first seawater cooler 4 is communicated with a fresh water outlet of the fresh water cooler 13, and a fresh water outlet of the first seawater cooler 4 is communicated with a fresh water inlet of the fresh water cooler 13;
a seawater inlet of the second seawater cooler 9 is communicated with a water outlet of a second seawater pipe 8, a seawater outlet of the second seawater cooler 9 is communicated with a water inlet of a second sea drainage pipe 10, a fresh water inlet of the second seawater cooler 9 is communicated with a fresh water outlet of a fresh water cooler 13, and a fresh water outlet of the second seawater cooler 9 is communicated with a fresh water inlet of the fresh water cooler 13;
an oil inlet of the fresh water cooler 13 is communicated with an oil outlet of the transformer 17, and an oil outlet of the fresh water cooler 13 is communicated with an oil inlet of the transformer 17;
because the scheme of cooling oil by using the fresh water cooling transformer and cooling fresh water by using seawater is adopted, the first seawater cooler 4 and the second seawater cooler 9 are arranged in a spare mode: under the normal operating condition, a seawater cooler works, and the other seawater cooler is standby, so when the working seawater cooler blocks the cooler due to fine dirt mixed in seawater so that the pressure difference between the inlet and the outlet of the cooler exceeds a set range, the inlets and the outlets of the working seawater cooler are automatically closed, and meanwhile, the inlet and the outlet of the standby seawater cooler are automatically opened to enter the operating condition, thereby ensuring that the seawater cooler can normally and stably work for a long time, improving the cooling efficiency of a cooling device, further improving the reliability of a transformer 17, ensuring the stability of power transmission and increasing the economic benefit of an owner.
Preferably, the cooling water pump 12 and the cooling oil pump 16 are also included; a water inlet of the cooling water pump 12 is respectively communicated with a fresh water outlet of the first seawater cooler 4 and a fresh water outlet of the second seawater cooler 9, and a water outlet of the cooling water pump 12 is communicated with a fresh water inlet of the fresh water cooler 13;
an oil inlet of the cooling oil pump 16 is communicated with an oil outlet of the transformer 17, and an oil outlet of the cooling oil pump 16 is communicated with an oil inlet of the fresh water cooler 13;
the cooling water pump 12 and the cooling oil pump 16 are provided to power the flow of cooling water and cooling oil.
Preferably, the device also comprises a first submersible pump 1 and a first marine life prevention device 2, wherein the water inlet of the first marine life prevention device 2 is communicated with the water outlet of the first submersible pump 1, the water outlet of the first marine life prevention device 2 is communicated with the water inlet of the first seawater pipe 3, and the water outlet of the first marine life prevention device 2 is also communicated with the water inlet of the second seawater pipe 8;
the marine organism preventing device is arranged on the seawater pipe communicated with the seawater cooler, so that marine organisms are prevented from breeding near the seawater cooler, the heat exchange efficiency of the seawater cooler is improved, and the cooling efficiency of the seawater cooler is improved.
Preferably, the device also comprises a second submersible pump 6 and a second marine life prevention device 7, wherein the water inlet of the second marine life prevention device 7 is communicated with the water outlet of the second submersible pump 6, the water outlet of the second marine life prevention device 7 is communicated with the water inlet of a second seawater pipe 8, and the water outlet of the second marine life prevention device 7 is also communicated with the water inlet of the first seawater pipe 3;
through set up the second behind second immersible pump 6 and prevent marine life device 7, realize preventing that marine life device one is equipped with one and uses the setting to further improve the effect that prevents the marine life device and filter the marine life, improve the cooling efficiency of sea water cooler.
Preferably, a water tank 14 for replenishing the fresh water in the fresh water cooler 13 is further included, and a water outlet of the water tank 14 is communicated with a fresh water inlet of the cooling water pump 12, so as to replenish the fresh water cooler 13 with cooling water.
Preferably, the fresh water cooling system further comprises a three-way temperature control valve 15, wherein an oil inlet of the three-way temperature control valve 15 is communicated with an oil outlet of the fresh water cooler 13, another oil inlet of the three-way temperature control valve 15 is communicated with an oil outlet of the transformer 17, and an oil outlet of the three-way temperature control valve 15 is communicated with an oil inlet of the transformer 17;
through setting up tee bend temperature-sensing valve 15 for oil after the cooling mixes with oil before the cooling, thereby control the cooling oil temperature that flows back transformer 17, avoids appearing the oil temperature and crosses low and lead to transformer 17 casing temperature variation great crackle.
Preferably, a liquid level alarm 18 is disposed on the water tank 14, so as to detect leakage of the water tank 14 in time and ensure sufficient amount of cooling water in the water tank 14.
Preferably, the transformer 17 is provided with a liquid level alarm 18 and a temperature alarm 19, and the purpose of the liquid level alarm 18 is to find the leakage condition of the cooling oil in time and ensure the oil level of the cooling oil in the transformer 17 to be normal, so as to avoid the damage of the transformer 17; the purpose of the temperature alarm 19 is to monitor the temperature of the transformer 17 and ensure that the transformer 17 operates normally and stably.
To sum up, according to the transformer cooling system for the offshore substation provided by the embodiment of the present invention, because a scheme of cooling transformer cooling oil with fresh water and cooling fresh water with seawater is adopted, a standby setting mode is adopted for the first seawater cooler 4 and the second seawater cooler 9: under the normal operating condition, a seawater cooler works, and the other seawater cooler is standby, so when the working seawater cooler blocks the cooler due to fine dirt mixed in seawater so that the pressure difference between the inlet and the outlet of the cooler exceeds a set range, the inlets and the outlets of the working seawater cooler are automatically closed, and meanwhile, the inlet and the outlet of the standby seawater cooler are automatically opened to enter the operating condition, thereby ensuring that the seawater cooler can normally and stably work for a long time, improving the cooling efficiency of a cooling device, further improving the reliability of a transformer 17, ensuring the stability of power transmission and increasing the economic benefit of an owner.
In addition, the seawater pipe communicated with the seawater cooler is provided with the marine organism prevention device, so that marine organisms are prevented from breeding near the seawater cooler, the heat exchange efficiency of the seawater cooler is improved, and the cooling efficiency of the seawater cooler is improved; and meanwhile, the marine organism prevention device is arranged in a spare mode, so that the effect of filtering marine organisms by the marine organism prevention device is further improved, and the cooling efficiency of the seawater cooler is improved.
It should be understood that the terms "first", "second", etc. are used herein to describe various information, but the information should not be limited to these terms, which are only used to distinguish one type of information from another. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present invention.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, many modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (6)
1. A transformer cooling system of an offshore substation is characterized by comprising a cooling device, a transformer, a first seawater pipe, a second seawater pipe, a first seawater discharge pipe, a second seawater discharge pipe and a pressure gauge, wherein the cooling device comprises a first seawater cooler, a second seawater cooler and a fresh water cooler;
the first seawater cooler and the second seawater cooler respectively comprise a seawater inlet, a fresh water inlet, a seawater outlet and a fresh water outlet;
the fresh water cooler comprises a fresh water inlet, an oil inlet, a fresh water outlet and an oil outlet;
the seawater inlet of the first seawater cooler is communicated with the water outlet of the first seawater pipe, the seawater outlet of the first seawater cooler is communicated with the water inlet of the first seawater discharge pipe, the fresh water inlet of the first seawater cooler is communicated with the fresh water outlet of the fresh water cooler, and the fresh water outlet of the first seawater cooler is communicated with the fresh water inlet of the fresh water cooler;
the seawater inlet of the second seawater cooler is communicated with the water outlet of the second seawater pipe, the seawater outlet of the second seawater cooler is communicated with the water inlet of the second sea drainage pipe, the fresh water inlet of the second seawater cooler is communicated with the fresh water outlet of the fresh water cooler, and the fresh water outlet of the second seawater cooler is communicated with the fresh water inlet of the fresh water cooler;
the pressure gauges are arranged at the seawater inlet and the seawater outlet of the first seawater cooler and the second seawater cooler;
an oil inlet of the fresh water cooler is communicated with an oil outlet of the transformer, and an oil outlet of the fresh water cooler is communicated with an oil inlet of the transformer;
the cooling water pump and the cooling oil pump are also included;
a water inlet of the cooling water pump is respectively communicated with a fresh water outlet of the first seawater cooler and a fresh water outlet of the second seawater cooler, and a water outlet of the cooling water pump is communicated with a fresh water inlet of the fresh water cooler;
an oil inlet of the cooling oil pump is communicated with an oil outlet of the transformer, and an oil outlet of the cooling oil pump is communicated with an oil inlet of the fresh water cooler;
still include first immersible pump, first anti-marine life device, the first water inlet of preventing the marine life device with the delivery port intercommunication of first immersible pump, the first delivery port of preventing the marine life device with the water inlet intercommunication of first sea water pipe, the first delivery port of preventing the marine life device still with the water inlet intercommunication of second sea water pipe.
2. The offshore substation transformer cooling system of claim 1, further comprising a second submersible pump, a second marine growth prevention device, the second marine growth prevention device having an inlet in communication with an outlet of the second submersible pump, the second marine growth prevention device having an outlet in communication with an inlet of the second seawater pipe, the second marine growth prevention device having an outlet in further communication with the inlet of the first seawater pipe.
3. The offshore substation transformer cooling system of claim 1, further comprising a water tank for replenishing fresh water in the fresh water cooler, a water outlet of the water tank being in communication with a fresh water inlet of the cooling water pump.
4. The offshore substation transformer cooling system of claim 1, further comprising a three-way temperature control valve, wherein an oil inlet of the three-way temperature control valve is communicated with an oil outlet of the fresh water cooler, another oil inlet of the three-way temperature control valve is communicated with an oil outlet of the transformer, and an oil outlet of the three-way temperature control valve is communicated with an oil inlet of the transformer.
5. The offshore substation transformer cooling system of claim 3, wherein a liquid level alarm is provided on the water tank.
6. The offshore substation transformer cooling system of claim 1, wherein a liquid level alarm and a temperature alarm are provided on the transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710812550.7A CN107424754B (en) | 2017-09-11 | 2017-09-11 | Transformer cooling system of offshore transformer substation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710812550.7A CN107424754B (en) | 2017-09-11 | 2017-09-11 | Transformer cooling system of offshore transformer substation |
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| CN107424754A CN107424754A (en) | 2017-12-01 |
| CN107424754B true CN107424754B (en) | 2023-04-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710812550.7A Active CN107424754B (en) | 2017-09-11 | 2017-09-11 | Transformer cooling system of offshore transformer substation |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109741909A (en) * | 2019-02-01 | 2019-05-10 | 广东粤电阳江海上风电有限公司 | A kind of maritime transformer station transformer fresh water cooled integrated equipment |
| CN111405831A (en) * | 2020-04-10 | 2020-07-10 | 广州高澜节能技术股份有限公司 | External cooling system and method for offshore flexible direct current transmission converter station |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6909349B1 (en) * | 1999-11-17 | 2005-06-21 | Trexco, Llc | Apparatus and method for cooling power transformers |
| CN102220946A (en) * | 2011-05-06 | 2011-10-19 | 中国科学院广州能源研究所 | Cooling system for offshore wind generating set |
| CN103996498A (en) * | 2014-06-11 | 2014-08-20 | 中国能建集团装备有限公司南京技术中心 | Seawater cooling system for main transformer of offshore substation |
| CN104900380A (en) * | 2015-06-03 | 2015-09-09 | 中国能源建设集团广东省电力设计研究院有限公司 | Cooling system of offshore wind power main transformer |
-
2017
- 2017-09-11 CN CN201710812550.7A patent/CN107424754B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6909349B1 (en) * | 1999-11-17 | 2005-06-21 | Trexco, Llc | Apparatus and method for cooling power transformers |
| CN102220946A (en) * | 2011-05-06 | 2011-10-19 | 中国科学院广州能源研究所 | Cooling system for offshore wind generating set |
| CN103996498A (en) * | 2014-06-11 | 2014-08-20 | 中国能建集团装备有限公司南京技术中心 | Seawater cooling system for main transformer of offshore substation |
| CN104900380A (en) * | 2015-06-03 | 2015-09-09 | 中国能源建设集团广东省电力设计研究院有限公司 | Cooling system of offshore wind power main transformer |
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