CN101645647B - DC converter valve cooling system based on passive technology - Google Patents
DC converter valve cooling system based on passive technology Download PDFInfo
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- CN101645647B CN101645647B CN2009100910580A CN200910091058A CN101645647B CN 101645647 B CN101645647 B CN 101645647B CN 2009100910580 A CN2009100910580 A CN 2009100910580A CN 200910091058 A CN200910091058 A CN 200910091058A CN 101645647 B CN101645647 B CN 101645647B
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- 238000001816 cooling Methods 0.000 title claims abstract description 77
- 238000005516 engineering process Methods 0.000 title claims abstract description 17
- 239000000498 cooling water Substances 0.000 claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 230000005484 gravity Effects 0.000 claims description 7
- 230000005494 condensation Effects 0.000 claims description 6
- 238000009833 condensation Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 6
- 238000001704 evaporation Methods 0.000 claims description 5
- 230000008020 evaporation Effects 0.000 claims description 5
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 3
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 2
- 230000008676 import Effects 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 abstract description 5
- 239000012530 fluid Substances 0.000 abstract description 4
- 239000002826 coolant Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000003020 moisturizing effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
The invention discloses a DC converter valve cooling system based on a passive technology, utilizing a natural force to drive fluid to flow so as to cool a converter valve. Under the normal operation condition, a main pump of a main cooling system provides enough cooling water of a cooling water loop in order to take away heat generated by heating elements of the converter valve. Under the condition of failures of the main cooling system, a passive cooling system is started to provide the emergency cooling ability for the heating elements of the converter valve. The passive cooling system can keep a normal operation function of the converter valve cooling system under the conditions of no support systems, such as DC power supplies, cooling water and heating support systems, air-condition and the like. Due to reducing the dependence on the support systems and personnel operation, the safety and the reliability of the cooling system are obviously improved.
Description
Technical field
The present invention relates to electric power system components and parts cooling field, relate in particular to a kind of DC converter valve cooling system based on passive technology.
Background technology
Along with the increase of electric power system capacity, element power density constantly increases, and the power loss of converter valve also constantly increases, and must adopt more efficiently cooling technology that relevant components and parts are moved in normal temperature range for this reason.At present, the type of cooling of converter valve heater element mainly contains air cooling, liquid cools, heat pipe phase transformation cooling and semiconductor refrigerating etc.Owing to adopted additionaling power, if having a power failure or unexpected main pump stoppage in transit accident, the abnormal running of cooling system can cause temperature of heating elements too high, thereby influences the converter valve operate as normal.
The non-passive safety notion is a kind of new ideas that are intended to improve nuclear plant safety property and reliability that put forward in the eighties in 20th century, stresses to maximally utilise natural driving force, and does not rely on active component (pump, blower fan and diesel engine generator etc.).The non-active design of converter valve is mainly reflected in the design of safety system basic change has taken place.Adopted non-active safety measure in a large number; Promptly utilize fluid to be heated or evaporate, cooling or condensation and the density contrast that produces form drive ram or potential difference forms gravity head; Need not to use any external impetus, especially under accident conditions, realize the heater element cooling; To derive the heat in the heater element, guarantee the integrality of converter valve.This passive safety system has not only been simplified ad hoc safety measure, and can the minimizing personnel intervene issuable misoperation, has improved man-computer relation and has improved the inherent safety of current conversion station.
Summary of the invention
Need adopt the shortcoming of additionaling power to above-mentioned prior art; The objective of the invention is to design a kind of DC converter valve cooling system based on passive technology, it has adopted non-active safety measure, need not to use any external impetus; Especially under accident conditions; The cooling of realization heater element to derive the heat in the heater element, is guaranteed the integrality of converter valve.It is a kind of technology of utilizing natural force (gravity, evaporation, condensation, free convection etc.) drive fluid to flow.Under normal operating condition condition, provide enough cooling waters of chilled(cooling) water return (CWR) that the heat that converter valve heater element (thyristor, saturable reactor and damping resistance etc.) produces is taken away by main pump.Under the converter valve cooling system emergency conditions, non-active start-up of cooling system provides the converter valve heater element cooling capacity of meeting an urgent need.This gravity, evaporation, condensation, natural circulation, the comprehensive passive technology invention of free convection can keep the normal operation function of converter valve cooling system under the condition that does not have back-up systems such as AC power, cooling water and heating, air-conditioning.Owing to reduced the dependence to back-up system and personnel operation, its fail safe, reliability have obtained tangible raising.
DC converter valve cooling system of the present invention; Be import and outlet two ends in converter valve; A parallelly connected DC converter valve cooling system with main cooling system based on passive technology; Should comprise the cooling tower, heat exchanger, storage tank, pneumatic control valve, converter valve and the electromagnetic valve that are connected before and after order successively based on the DC converter valve cooling system of passive technology; Each parts that said front and back successively are connected are connected by associated conduit, and said main cooling system is driven by main pump, and the inlet of said cooling tower is connected to the converter valve outlet pipe through the electromagnetic valve of often opening; It also is the hot arc pipeline of converter valve; The delivery port of said cooling tower is connected to the inlet of said heat exchanger, and said heat exchanger setting also is immersed in the said storage tank, and said heat exchanger is connected to the oral siphon of converter valve through the normally-closed pneumatic control valve of two parallel connections; It also is the cold segment pipe of converter valve; The normally-closed pneumatic control valve of said two parallel connections is opened when receiving the action control signal, and the position that said heat exchanger is provided with is higher than the position of converter valve, so that when the main cooling system that comprises main pump lost efficacy, have certain natural-circulation capacity; Said natural-circulation capacity is meant the ability of utilizing natural force to drive water flows, and said natural-circulation capacity can drive water and in said non-active DC converter valve cooling system, circulate.
Wherein, in normal working conditions, providing also by said main pump, pumps cooled water flows in the main cooling system of converter valve; Come said converter valve is cooled off, under emergency conditions, when main cooling system is out of service; The pneumatic control valve of parallel connection receives control signal and opens in the said non-active DC converter valve cooling system; The cooling water steam is the arrival cooling tower under the effect of said natural circulation power, under the free convection effect, is condensed into liquid and collects in the heat exchanger, with storage tank generation heat exchange; Owing to exist the position height difference and the temperature difference between the cold segment pipe of heat exchanger and converter valve; Therefore, the natural circulation that will form cooling water behind the pneumatic control opening of valves of said parallel connection flows, and the direction of flow of cooling water forces flow direction identical with the generation of the main pump of said main cooling system.
Wherein, the situation of leaking appears in each parts that comprise pipeline or the main cooling system of the out of service or main cooling system of main pump under the said emergency conditions, and causes cooling water forfeiture speed to surpass the cooling water forfeiture accident of the normal supply capacity of cooling water make-up system.
Wherein, said natural force comprises gravity, evaporation, condensation and free convection.
Wherein, can make the mixture of spent glycol and water replace said cooling water.
Wherein, the minimum position of said heat exchanger is more taller than the high-order bit of converter valve.
The invention has the beneficial effects as follows:
1) converter valve non-passive safety cooling system does not need operator's action to alleviate design basis accident.These systems only utilize the natural force factor, and for example gravity, natural circulation and compressed air make system works, and need not adopt pump, blower fan, diesel engine, cooling-water machine or other active machines.
2) converter valve non-passive safety cooling system only needs a spot of valve to connect, and can start automatically.These valves are designed to when losing power supply or receive the safeguard protection enabling signal, start the safeguard protection state of carrying out them.These valves are supported by multiple reliable source of power also, to avoid the unnecessary children that opens.
3) adopt passive system, the equipment unit that is comprised significantly reduces, thereby has reduced required test, examination and maintenance.They do not need active back-up system (comprising AC power, HVAC, cooling water, earthquake-resistant structure), and situation in place is easy to monitored.
Description of drawings
Below in conjunction with accompanying drawing the present invention is further specified.
Fig. 1 is a kind of DC converter valve cooling system sketch map based on passive technology of the present invention.
Embodiment
In order to reach above-mentioned goal of the invention, technical scheme of the present invention realizes as follows:
A kind of DC converter valve cooling system design based on passive technology, it comprises cooling tower, heat exchanger, storage tank and associated conduit, valve etc.A kind of technology that is characterized in utilizing natural force (gravity, evaporation, condensation, free convection etc.) drive fluid to flow.Its cooling system route layout plan is as shown in the figure.The inlet of cooling tower is connected to the hot arc of converter valve main cooling system through the electromagnetically operated valve of often opening; Heat exchanger is arranged and is immersed in the storage tank; The normally-closed pneumatic control valve of two parallel connections is housed on the outlet of cold section to converter valve cooling system of heat exchanger, and this valve can be opened when losing air pressure or receive the action control signal.The position that heat exchanger is arranged is higher than the position of converter valve main cooling system, so that certain natural-circulation capacity was arranged when Main Condensate Pump lost efficacy.
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
Non-active cooling system is mainly taken away the heat in the converter valve through the heat exchanger and the cooling tower free convection that are immersed in the storage tank.In normal working conditions, by main pump water cooling converter valve heater element is provided.Under emergency conditions; Stop transport or but leaking appears in system pipeline or the parts that communicate with it like main pump; And when causing cooling water forfeiture speed to surpass the coolant loss accident of the normal moisturizing ability of cooling agent make-up system, the pneumatic control valve on the cold segment pipe from the heat exchanger to the converter valve cooling system is opened.Steam is the arrival cooling tower under the natural force effect, under the free convection effect, is condensed into water and collects in the heat exchanger, with storage tank generation heat exchange.Owing to exist the potential difference and the temperature difference between heat exchanger and the converter valve cooling section, therefore, the natural circulation that will form the converter valve cooling water after pneumatic operated valve is opened flows, and its direction forces flow direction identical with the main pump generation.
The main cooling system of the converter valve that the present invention does not describe in detail and components and parts thereof are known technology, are not described in detail in this.
Invention has been described according to specific exemplary embodiment here.It will be conspicuous under not departing from the scope of the present invention, carrying out suitable replacement to one skilled in the art or revise.Exemplary embodiment only is illustrative, rather than to the restriction of scope of the present invention, scope of the present invention is by appended claim definition.
Claims (6)
1. DC converter valve cooling system; Be import and outlet two ends in converter valve; A parallelly connected DC converter valve cooling system based on passive technology with main cooling system should comprise the cooling tower, heat exchanger, storage tank, pneumatic control valve, converter valve and the electromagnetic valve that are connected before and after order successively based on the DC converter valve cooling system of passive technology, and each parts that said front and back successively are connected are connected by associated conduit; Said main cooling system is driven by main pump; The inlet of said cooling tower is connected to the converter valve outlet pipe through the electromagnetic valve of often opening, and also is the hot arc pipeline of converter valve, and the delivery port of said cooling tower is connected to the inlet of said heat exchanger; Said heat exchanger setting also is immersed in the said storage tank; Said heat exchanger is connected to the oral siphon of converter valve through the normally-closed pneumatic control valve of two parallel connections, also is the cold segment pipe of converter valve, and the normally-closed pneumatic control valve of said two parallel connections is opened when receiving the action control signal; The position that said heat exchanger is provided with is higher than the position of converter valve; So that when the main cooling system that comprises main pump lost efficacy, have certain natural-circulation capacity, said natural-circulation capacity is meant the ability of utilizing natural force to drive water flows, and said natural-circulation capacity can drive water and in said non-active DC converter valve cooling system, circulate.
2. the system of claim 1; It is characterized in that in normal working conditions, provide and pumps cooled water flows in the main cooling system of converter valve, come said converter valve is cooled off by said main pump; Under emergency conditions; When main cooling system was out of service, the pneumatic control valve of parallel connection received control signal and opens in the said non-active DC converter valve cooling system, and the cooling water steam is the arrival cooling tower under the effect of said natural circulation power; Under the free convection effect, be condensed into liquid and collect in the heat exchanger; With storage tank generation heat exchange, owing to exist the position height difference and the temperature difference between the cold segment pipe of heat exchanger and converter valve, therefore; The natural circulation that will form cooling water behind the pneumatic control opening of valves of said parallel connection flows, and the direction of flow of cooling water forces flow direction identical with the generation of the main pump of said main cooling system.
3. system as claimed in claim 2; The situation of leaking appears in each parts that it is characterized in that comprising under the said emergency conditions pipeline or the main cooling system of the out of service or main cooling system of main pump, and causes cooling water forfeiture speed to surpass the cooling water forfeiture accident of the normal supply capacity of cooling water make-up system.
4. like the described system of arbitrary claim among the claim 1-3, it is characterized in that said natural force comprises gravity, evaporation, condensation and free convection.
5. system as claimed in claim 2 is characterized in that making the mixture of spent glycol and water to replace cooling water.
6. the system of claim 1 is characterized in that the minimum position of said heat exchanger is more taller than the high-order bit of converter valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100910580A CN101645647B (en) | 2009-08-24 | 2009-08-24 | DC converter valve cooling system based on passive technology |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100910580A CN101645647B (en) | 2009-08-24 | 2009-08-24 | DC converter valve cooling system based on passive technology |
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| CN101645647A CN101645647A (en) | 2010-02-10 |
| CN101645647B true CN101645647B (en) | 2012-06-27 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102097402B (en) * | 2010-11-17 | 2013-08-14 | 中国电力科学研究院 | DC (Direct Current) device for equalizing pressure of converter valve waterway |
| CN102480214A (en) * | 2010-11-30 | 2012-05-30 | 沈阳铝镁设计研究院有限公司 | Automatic water supplementing device for water-air cooler of rectifier cabinet |
| CN102435033B (en) * | 2011-12-01 | 2014-05-14 | 国家电网公司 | Closed type circulation water cooling device and method thereof |
| CN102566623B (en) * | 2012-01-04 | 2014-08-20 | 广州高澜节能技术股份有限公司 | Control system of direct current power transmission converter valve pure water cooling device |
| CN103375862B (en) * | 2012-04-27 | 2016-03-02 | 上海核工程研究设计院 | A kind of non-active air-conditioning system for master-control room |
| CN105864018B (en) * | 2016-04-05 | 2018-09-07 | 武汉船用机械有限责任公司 | A kind of ultra-low temperature testing device suitable for immersed pump |
| CN110726069A (en) * | 2019-10-31 | 2020-01-24 | 海德利森(天津)检测设备有限公司 | Cooling system for skid-mounted hydrogenation equipment |
| CN111662687A (en) * | 2020-05-25 | 2020-09-15 | 河北冀研能源科学技术研究院有限公司 | Novel cooling medium for high-voltage direct-current transmission converter valve |
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2009
- 2009-08-24 CN CN2009100910580A patent/CN101645647B/en active Active
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| CN1098443C (en) * | 1997-02-28 | 2003-01-08 | 黄绍光 | Heat pump ice water machine device |
| CN2837766Y (en) * | 2004-03-29 | 2006-11-15 | 福建科瑞时代控制技术有限公司 | Industrial cooling water circulation controller |
| CN101351942A (en) * | 2005-11-16 | 2009-01-21 | 西门子公司 | Apparatus for converting an electrical current and method for reducing the load-change stress of power semiconductor units in the high-voltage energy distribution and transmission sector |
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| CN101645647A (en) | 2010-02-10 |
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Owner name: STATE GRID CORPORATION OF CHINA SHAOXING POWER BUR Effective date: 20121206 |
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Effective date of registration: 20121206 Address after: 100085 Beijing city Haidian District Qinghe small Camp Road No. 15 Patentee after: China Electric Power Research Institute Patentee after: State Grid Corporation of China Patentee after: Shaoxing Power Bureau Address before: 100192 Beijing city Haidian District Qinghe small Camp Road No. 15 Patentee before: China Electric Power Research Institute |