CN107343377B - Water-cooling heat dissipation system of wind generating set converter and control and laying method thereof - Google Patents
Water-cooling heat dissipation system of wind generating set converter and control and laying method thereof Download PDFInfo
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- CN107343377B CN107343377B CN201611257669.4A CN201611257669A CN107343377B CN 107343377 B CN107343377 B CN 107343377B CN 201611257669 A CN201611257669 A CN 201611257669A CN 107343377 B CN107343377 B CN 107343377B
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 230000017525 heat dissipation Effects 0.000 title abstract description 10
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- 239000002826 coolant Substances 0.000 claims description 117
- 239000007788 liquid Substances 0.000 claims description 103
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Classifications
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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
- H05K7/20927—Liquid coolant without phase change
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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
- H05K7/20945—Thermal management, e.g. inverter temperature control
Abstract
The invention relates to a water-cooling heat dissipation system of a wind generating set converter and a control and laying method thereof. The water-cooling heat dissipation system comprises an underground cooling system, wherein the underground cooling system comprises a first trunk pipeline, a second trunk pipeline and a plurality of branch pipelines, the branch pipelines are buried underground along the vertical direction so that cooling liquid in the branch pipelines can exchange heat with the underground environment, and the depths of the branch pipelines extending into the underground environment are different. The control method comprises the following steps: and controlling the cooling liquid to flow into the ground cooling system and back to the converter in response to the temperature of the cooling liquid at the cooling liquid outlet of the converter being greater than a first preset temperature, and controlling the cooling liquid to flow back to the converter through the bypass pipeline in response to the temperature of the cooling liquid at the cooling liquid outlet of the converter being less than a second preset temperature.
Description
Technical field
The present invention relates to technical field of wind power, and more particularly, being related to one kind has multistage heat dissipation ladder and be able to achieve list
The water-cooling heat radiating system for wind driven generator set converter solely controlled, and control and the side for laying the water-cooling heat radiating system
Method.
Background technique
MW class (1MW or more) wind power generating set adjusts usually using the speed that current transformer carries out generator and will hair
The electricity that motor issues is sent to power grid, and the radiating mode of current transformer is mainly water-cooling at present, i.e.,：Coolant liquid is forced by pump
Current transformer is flowed into, the heat transfer inside current transformer is flowed out out of current transformer, so to coolant liquid in the coolant liquid for increasing temperature
Coolant liquid passes air through radiator by the outer radiator of tower, the fan pressure of the outer radiator of tower afterwards, when air passes through cooling fin
When, the heat of coolant liquid is taken away, thus reciprocation cycle, maintains the temperature inside current transformer in a certain range.
For radiator outside tower, it is thus necessary to determine that suitable installation site, for example, a radiator needs to occupy about 6m2's
Soil, part type use two even more radiators, and occupied area will be more than 12m2Even 24m2.For southern landform
For the engineering in complex region (mountainous region, fish pond) or the bad region of condition of taking over the land for use, more troublesome, reducing occupied area will be big
Amplitude reduction cost.
In addition, being exposed to the radiator tower in air Wai can only be under certain ambient temperature conditions for high temperature area
Effectively heat dissipation.When environment temperature is consistent with water temperature, radiator will lose heat-sinking capability.
In addition, the region more for poplar, willow near seat in the plane, it is easy to be wadded a quilt with cotton by poplar between heat radiator fin, catkin filling,
Radiator heat-dissipation ability is greatly reduced.
Therefore, it is necessary to develop a kind of current transformer water-cooling heat radiating system, which is existed
Effectively radiated when environment temperature is high, reduce occupied area, the coolant liquid in reasonable distribution cooling system, reduce electric consumption and
Noise and not by pollutant effect in environment.
Summary of the invention
It is an object of the present invention to provide a kind of current transformer water-cooling heat radiating systems, so that the current transformer water-cooling system
System can effectively be radiated when environment temperature is high, reduce occupied area, the coolant liquid in reasonable distribution cooling system, reduce
Electric consumption and noise and not by pollution effect in environment.
Another object of the present invention is to provide a kind of methods for controlling above-mentioned current transformer water-cooling heat radiating system, so that the party
Method can ensure that current transformer is effectively run within the scope of larger temperature, and close the coolant liquid in current transformer water-cooling heat radiating system
Reason distribution, to meet different heat production/temperature regimes of current transformer.
Another object of the present invention is to provide a kind of method for installing above-mentioned current transformer water-cooling heat radiating system, so that the party
Method can ensure efficiently and be firmly fixed or connect all parts of the current transformer water-cooling heat radiating system.
According to an aspect of the present invention, a kind of water-cooling heat radiating system for wind driven generator set converter is provided, it is described
Water-cooling heat radiating system includes ground cooling system, and described ground cooling system includes the first trunk line, the second trunk line and multiple branch lines
Pipeline, first trunk line connect current transformer cooling liquid outlet by triple valve and connect the multiple branch by triple valve
The entrance on spool road, so that the coolant liquid from current transformer selective flows through first trunk line and selectively
It flows into one or more in the multiple tap line；Second trunk line connects current transformer coolant inlet and leads to
The outlet that triple valve connects the multiple tap line is crossed, so that the cooling liquid stream from one or more tap line
Enter current transformer；The multiple tap line is embedded in underground along the vertical direction, so that the coolant liquid in tap line and underground ring
Border carries out heat exchange, and the depth that each tap line in the multiple tap line protrudes into underground can be different from each other.
Optionally, each tap line can protrude into the sequence of the depth of underground from small to large by cloth according to tap line
It sets.
Optionally, the depth that each tap line protrudes into underground can be associated with underground mean temperature.
Optionally, the depth that each tap line protrudes into underground can also be associated with the quantity of tap line.
Optionally, the multiple tap line can be U-tube.
According to an aspect of the present invention, the water-cooling heat radiating system may also include controller, and the controller may be in response to
The temperature of coolant liquid at current transformer cooling liquid outlet is greater than the first predetermined temperature, and control coolant liquid flows into ground cooling system, then flows
It is back to current transformer.
According to an aspect of the present invention, the water-cooling heat radiating system further includes bypass line, one end of the bypass line
Current transformer cooling liquid outlet can be connected by bypass line triple valve, it is cooling that the other end of the bypass line can connect current transformer
Liquid entrance, the controller can make a reservation for temperature less than second further in response to the temperature of the coolant liquid at current transformer cooling liquid outlet
Degree, controls the bypass line triple valve, so that coolant liquid is flowed only through the bypass line, and flow back into current transformer.
According to an aspect of the present invention, the controller may be in response to the temperature of the coolant liquid at current transformer cooling liquid outlet
Greater than first predetermined temperature, the smallest tap line of depth for protruding into underground that coolant liquid flows into ground cooling system is controlled,
The controller then may be in response at the temperature and current transformer coolant inlet of the coolant liquid at current transformer cooling liquid outlet
The temperature difference between the temperature of coolant liquid is less than predetermined temperature difference target Continuous predetermined amount of time, and control coolant liquid is stretched according to tap line
Enter the sequence continuation of the depth of underground from small to large successively to flow into other than the smallest tap line of the depth for protruding into underground
One or more tap lines, until the temperature difference is greater than or equal to the predetermined temperature difference target.
According to another aspect of the present invention, a kind of side of water-cooling heat radiating system controlling wind driven generator set converter is provided
Method, the water-cooling heat radiating system include ground cooling system, described ground cooling system include the first trunk line, the second trunk line with it is more
A tap line, the entrance of the connection of the first trunk line the current transformer cooling liquid outlet and the multiple tap line are described
Second trunk line connects the outlet and current transformer coolant inlet of the multiple tap line, and the multiple tap line is along perpendicular
Histogram to being embedded in underground, and each tap line in the multiple tap line protrude into underground depth it is different from each other,
The method may include：It is greater than the first predetermined temperature in response to the temperature of the coolant liquid at current transformer cooling liquid outlet, controls cold
But liquid stream enters ground cooling system, then flows back into current transformer；And it is less than in response to the temperature of the coolant liquid at current transformer cooling liquid outlet
Second predetermined temperature controls coolant liquid by bypass line and flows back into current transformer, wherein one end of the bypass line, which connects, to be become
Device cooling liquid outlet is flowed, the other end of the bypass line connects current transformer coolant inlet；Wherein, first predetermined temperature
Greater than second predetermined temperature.
According to another aspect of the present invention, the method may also include：In response to the cooling at current transformer cooling liquid outlet
The temperature of liquid is greater than first predetermined temperature, and control coolant liquid flows into the smallest branch of depth for protruding into underground in ground cooling system
Spool road；The temperature that then may be in response to the coolant liquid at current transformer cooling liquid outlet and the cooling at current transformer coolant inlet
The temperature difference between the temperature of liquid is less than predetermined temperature difference target Continuous predetermined amount of time, controls coolant liquid according to tap line and protrudes into ground
Under depth sequence from small to large continue one successively flowed into other than the smallest tap line of the depth for protruding into underground
Or multiple tap lines, until the temperature difference is greater than or equal to the predetermined temperature difference target.
According to another aspect of the invention, a kind of side for laying the ground cooling system for wind driven generator set converter is provided
Method, the method may include：Drill out multiple holes of different depth to underground along the vertical direction using drilling machine；Preparation with it is the multiple
Tap line of the multiple U-tubes of the associated different length of the depth in hole as ground cooling system；Coolant liquid is filled into described
In multiple U-tubes；Clump weight is bundled at the bent sub of each U-tube；The multiple U-tube is set respectively together with clump weight
In the multiple hole；Into the multiple hole, grouting is to fill the gap between U-tube and hole wall；By the multiple U-tube
Opening by triple valve be connected respectively to cooling system the first trunk line and the second trunk line, and by the first main line pipe
Road and the second trunk line are connected respectively to current transformer cooling liquid outlet and current transformer coolant inlet, are consequently formed describedly cold
System.
The present invention, which passes through, is set to underground for a part of the water-cooling heat radiating system for the current transformer for being used for wind power generating set,
It include ground cooling system, and using underground temperature low feature when environment temperature on the ground high (for example, summer), so that from
The raised coolant liquid of the temperature flowed out in current transformer can carry out sufficiently heat with underground low temperature soil environment in ground cooling system and hand over
It changes, while different from the radiator that ground or more is arranged in the prior art, does not need fans force air and pass through radiator, because
This can be effectively reduced noise and reduces power consumption；In addition, the ground cooling system in the present invention will not be because by pollutant in environment
It influences and is unable to operate normally.
In addition, the tap line of multiple and different length (buried depth) is arranged by cooling system over the ground by the present invention,
So that each tap line formation temperature is adjusted ladder, and the valve of each tap line or bypass line is individually controlled, makes
The water-cooling heat radiating system for obtaining the current transformer for wind power generating set of the invention can make to cool down according to current transformer radiating requirements
Liquid selectively flows into ground cooling system and selectively flows into different tap lines, it is possible thereby to make the water-cooling heat radiating system
With wider temperature regulating range, and can coolant liquid in reasonable distribution system, dissipated with meeting the difference of current transformer
Heat demand.
In addition, the present invention is by the way that a part of the water-cooling heat radiating system for the current transformer for being used for wind power generating set to be set to
Underground, it is possible to reduce the occupied area of cooling system, reduce expropriation of land cost, and can be adapted for region with a varied topography (mountainous region,
Fish pond etc.).
Detailed description of the invention
By the description carried out with reference to the accompanying drawing, above and other objects of the present invention and feature will become more clear
Chu, wherein：
Fig. 1 is the water-cooling heat radiating system for showing the current transformer for wind power generating set of embodiment according to the present invention
Schematic diagram；
Fig. 2 is the enlarged view of the aerial part of the water-cooling heat radiating system in Fig. 1；
Fig. 3 is the schematic diagram for showing U-tube underground laying mode；And
Fig. 4 is the flow chart for showing the method for laying ground cooling system.
Drawing reference numeral explanation：
10：Current transformer 100：Ground cooling system
110：First trunk line 120：Second trunk line
11：Current transformer cooling liquid outlet 12：Current transformer coolant inlet
330：Bypass line 41,42：Temperature sensor
210,220,230,240,250：Tap line
311,211,212,221,222,231,232,241,242：Triple valve
Specific embodiment
Hereinafter with reference to attached drawing, the present invention is more fully described, exemplary implementation the invention is shown in the accompanying drawings
Example.However, the present invention can be implemented in many different forms, and it should not be construed as limited to implementation presented herein
Example.On the contrary, thesing embodiments are provided so that the disclosure will be thorough and complete, and fully convey the scope of the present invention to
Those skilled in the art.In the accompanying drawings, identical label always shows identical element.
In general, subsurface temperature is lower than ground temperature, for example, showing according to available data, Shanghai temperature on average in July is 27.8
DEG C, it is then to drop to 16.9 DEG C at 20.6 DEG C, 3.2 meters at 24.0 DEG C, 1.6 meters at 0.8 meter of underground.Therefore, ground temperature is opposite
Gao Shi, subsurface temperature are relatively very low.In addition, within the scope of tens meters to tens of meters of underground, there are thermostat layers, and constant temperature layer region is not
It is influenced, and is not influenced by earth's surface light radiation by depths earth's crust radioactive radiation, temperature long term constant.Based on the above feature, this hair
Radiator outside the tower for the current transformer for being used for wind turbine power generation unit is set to underground by bright proposition, to utilize subsurface temperature ratio ground
The low feature of temperature, allow from current transformer flow out the raised coolant liquid of temperature in the radiator for being set to underground with
Underground low temperature soil environment carries out fully heat exchange.
Fig. 1 shows the water-cooling heat radiating system of the current transformer for wind power generating set of embodiment according to the present invention
Schematic diagram, Fig. 2 are the enlarged views of the aerial part of the water-cooling heat radiating system in Fig. 1.
Water-cooling heat radiating system referring now to Fig. 1 and Fig. 2, the current transformer 10 for wind power generating set may include being set to ground
Under ground cooling system 100, ground cooling system 100 may include the first trunk line 110, the second trunk line 120 and multiple spools
Road is (as an example, show five tap lines 210,220,230,240,250, but according to the actual heat dissipation of current transformer in figure
Multiple tap lines can be set in demand), the first trunk line 110 can connect current transformer cooling liquid outlet by triple valve 311
11 and tap line 210,220,230,240 is connected respectively to by triple valve 211,221,231,241,250 entrance, so that
Coolant liquid from current transformer 10 optionally flows through the first trunk line 110 and optionally flows into multiple branch lines
It is one or more in pipeline 210,220,230,240,250；Second trunk line 120 can connect current transformer coolant inlet
12 and the outlet of tap line 210,220,230,240,250 can be separately connected by triple valve 212,222,232,242, so that
Coolant liquid from one or more tap lines 210,220,230,240,250 flows into current transformer 10；More specifically, ground is cold
The coolant inlet of the tap line 210 of system 100 is connected to the first trunk line of ground cooling system 100 by triple valve 211
110, the cooling liquid outlet of tap line 210 is connected to the second trunk line 120 of ground cooling system 100 by triple valve 212；Branch
The coolant inlet on spool road 220 is connected to the first trunk line 110 by triple valve 221, and the coolant liquid of tap line 220 goes out
Mouth is connected to the second trunk line 120 by triple valve 222；The coolant inlet of tap line 230 is connected by triple valve 231
Cooling liquid outlet to the first trunk line 110, tap line 230 is connected to the second trunk line 120 by triple valve 232；
The coolant inlet of tap line 240 is connected to the first trunk line 110, the coolant liquid of tap line 240 by triple valve 241
Outlet is connected to the second trunk line 120 by triple valve 242；Tap line 250 is used as the last one tap line, cooling
Liquid entrance can be connected to the first trunk line 110 by triple valve 241, and cooling liquid outlet can be connected to by triple valve 242
Second trunk line 120.First trunk line 110 can be going out for receiving from current transformer coolant liquid for ground cooling system 100
The coolant liquid of mouth 11 and the water inlet trunk line that coolant liquid is assigned to each tap line, the second trunk line 120 can be
Ground cooling system 100 is used to receive and collect the coolant liquid flowed out from each tap line and coolant liquid is made to flow into current transformer cooling
The water outlet trunk line of liquid entrance.Triple valve used in the present invention can be electric actuation triple valve or gas actuation 3-way valve, and three
The actuator of port valve may be connected to controller, and controller can need individually to control each triple valve according to different heat dissipations
System.
Tap line 210,220,230,240,250 can be embedded in underground along the vertical direction, so that cold in tap line
But liquid and underground environment carry out heat exchange, and the depth that each tap line 210,220,230,240,250 protrudes into underground can be each other
It is different.The depth that tap line 210,220,230,240,250 protrudes into underground can be associated with underground mean temperature.For example,
The early period of wind field construction, can be respectively in megathermal period and hypothermic phase to the punching of 100 meters of underground in survey, and is put into temperature sensing
Device is collected 100 meters of the underground temperature variation curve data in two periods, by the processing to data are collected, can obtain depth
Spend the pass between (on the basis of ground surface) and underground mean temperature (mean temperature here can refer to mean annual temperature)
Connection relationship, for example, it is assumed that mean temperature is 20 DEG C at 5 meters of depth；At 10 meters of depth, mean temperature is 10 DEG C, the two
Example is only hypothetical explanation, and the relationship of specific depth and mean temperature can be obtained according to actual measured results, and for not
The relationship of same area, depth and mean temperature is not also identical.In this way, the tap line of multiple and different depth, which is arranged, can form one
Fixed temperature regulating gradient, the bigger tap line heat-sinking capability of depth are stronger.Tap line 210,220,230,240,250 is stretched
The depth for entering underground can also be associated with the quantity of tap line, in the case where meeting identical ground cooling system heat-sinking capability,
It can make that the depth of each tap line is small but quantity is more, can also make that the depth of each tap line is big but quantity is few, and
It can be by adjusting the quantity of tap line, to adjust the heat-sinking capability or heat dissipation ladder of ground cooling system.
Tap line 210,220,230,240,250 can protrude into the sequence of the depth of underground from small to large according to tap line
Be arranged, as shown in fig. 1, tap line 210,220,230,240,250 according to the depth or length of pipe for protruding into underground from
It is small to be sequentially arranged from right to left to big sequence, in practical laid processes, can according to different terrain or other field conditions into
Row arrangement, to make full use of local soil condition on the basis of meeting cooling requirements.
Tap line 210,220,230,240,250 can be U-tube.U-tube can be used corrosion-resistant, wear-resisting and be not easy Yin Wen
The material that degree changes and is deformed is made, in addition, the temperature difference between the coolant inlet and outlet to avoid ground cooling system 100
It is excessive, the general material of thermal conductivity can be used.Preferably U-tube can be made of polyvinylchloride.
Water-cooling heat radiating system according to the present invention for wind driven generator set converter further includes bypass line 330, when
(for example, in current transformer initial operating stage, the temperature of the coolant liquid in current transformer is lower than when coolant liquid in current transformer does not need to radiate
In current transformer when the normal operation required temperature of all parts), coolant liquid can flow back into current transformer 10 by bypass line 330.
Temperature sensor 41 and 42, temperature sensor 41 can be respectively set at current transformer cooling liquid outlet 11 and entrance 12
It may be connected to controller with 42, with real-time measurement coolant temperature, and temperature signal be sent to controller, controller can basis
Temperature signal adjusts each triple valve, to adjust the flow direction of coolant liquid, and then adjusts the temperature of coolant liquid.In current transformer 10
Initial operating stage (this when, cabinet body did not needed to radiate, and the cold cooling system in ground does not start), coolant temperature is lower than the first predetermined temperature
Degree (for example, in 10 initial operating stage of current transformer, coolant temperature is lower than 5 DEG C in current transformer 10), the temperature of coolant liquid can not at this time
Conducive to the operation of all parts in current transformer, the predetermined temperature can be the normal operation institute according to all parts in current transformer
It needs temperature and is arranged, at this moment controller controls triple valve 311, so that the coolant liquid flowed out from current transformer 10 passes through triple valve
Only flow into bypass line 330 when 311, and flow back to current transformer 10, thus make coolant liquid using current transformer 10 operation generate heat and
It is heated, so that the temperature of coolant liquid is suitable for the operation of all parts.
When the temperature of coolant liquid is continuously increased with the continuous service of current transformer 10, need to cool down coolant liquid
So that coolant temperature is maintained at suitable in the range of component operation, temperature at current transformer cooling liquid outlet 11 is greater than the
When two predetermined temperatures, the second set predetermined temperature can be greater than the first predetermined temperature, such as can be greater than 10 DEG C, such as 10 DEG C,
20 DEG C, 30 DEG C, 40 DEG C, 50 DEG C or higher, coolant temperature is no longer appropriate for the operation of current transformer all parts at this time, needs to cold
But liquid is cooled down, and can control coolant liquid to flow into ground cooling system 100, to radiate using ground cooling system 100 to coolant liquid.
According to one embodiment of present invention, coolant liquid is being carried out in radiation processes using ground cooling system 100, controller controls first
Triple valve 211 and 212 is opened, and coolant liquid is made to only flow into the smallest tap line of depth for protruding into underground in ground cooling system 100
210, subsequent controller in response to the coolant liquid at current transformer cooling liquid outlet 11 temperature and current transformer coolant inlet 12 at
Coolant liquid temperature between the temperature difference be less than predetermined temperature difference target Continuous predetermined amount of time, control coolant liquid according to tap line
Protrude into the depth of underground from small to large sequence continuation successively flow into addition to the smallest tap line 210 of the depth for protruding into underground it
Outer one or more tap lines, until the temperature difference is greater than or equal to predetermined temperature difference target, which is
It is arranged according to temperature range of operation needed for all parts of current transformer and current transformer radiating requirements.Of the invention one
In a embodiment, when the temperature of the coolant liquid at current transformer cooling liquid outlet 11 is greater than predetermined temperature, controller controls threeway
Valve 211 and 212 is opened, so that tap line 210 starts to carry out coolant liquid circulation, some cycles to be recycled (or one timing of circulation
Between or predetermined hold-time section, the time can according to radiating requirements be based on soil or the rock capacity of heat transmission, pipeline and coolant liquid
Thermal coefficient, cooling liquid speed, cooling system pipeline and current transformer internal duct complexity etc. are because usually determining) after, if
Between the temperature of coolant liquid at current transformer cooling liquid outlet 11 and the temperature of the coolant liquid at current transformer coolant inlet 12
The temperature difference is still less than predetermined temperature difference target (for example, the temperature range of operation according to needed for all parts of current transformer and current transformer
It is 10 DEG C that the predetermined temperature difference target, which is arranged, in radiating requirements, and certainly according to radiating requirements, which, which can be, is set
For any suitable numerical value), then controller control triple valve 221 and 222 is opened, so that tap line 220 starts to be cooled down
Liquid circulation, the depth that tap line 220 protrudes into underground are greater than the depth of tap line 210, some cycles to be recycled (or continue pre-
Fix time section) after, if the cooling at the temperature of the coolant liquid at current transformer cooling liquid outlet 11 and current transformer coolant inlet 12
The temperature difference between the temperature of liquid is still less than predetermined temperature difference target, then control continues starting triple valve 231 and 232, so that branch spool
Road 230 starts to carry out coolant liquid circulation, and the depth that tap line 230 protrudes into underground is greater than the depth of tap line 220, with such
It pushes away, until coolant liquid is greater than or equal to predetermined temperature difference target.Water-cooling heat radiating system is controlled in this way, can use not
Meet different current transformer radiating requirements with the tap line of depth, and can be with the flowing of reasonable distribution coolant liquid.
Referring to Fig. 3 and Fig. 4, a kind of method of laying ground cooling system is provided, Fig. 3 shows U-tube underground laying mode
Schematic diagram, Fig. 4 are the flow charts for showing the method for laying ground cooling system.
, can be according to the temperature data reconnoitred in location before laying ground cooling system, and combine being averaged for on-site soil
The parameters such as thermal coefficient, thermal diffusivity are designed according to the specific targets of wind power generating set heat dissipation target, formulate different depths
The pipe laying plan of degree, different number.
In laid processes, mainly include the following steps：
Drill out multiple holes of different depth to underground along the vertical direction using drilling machine, each hole should have can accommodate it is each
The diameter of tap line (for example, U-tube) can be crept into, if it is sand if construction area stratum soil property is relatively good using open-hole
Layer, hole wall are easy to collapse, then need setting of casing to prevent hole wall collapse, subsequent poling can be passed to directly from casing, after the completion of construction
Take out casing.Slush pump can be used that most of ground is pumped out ground after drilling；
Prepare branch of the multiple U-tubes of different length associated with the depth in the multiple hole as ground cooling system 100
Spool road can connect the mode of (for example, welding) two straight tubes by using U-bend connector to prepare U-tube, it is preferable that in U
After the completion of shape control is standby, the water pressure test is carried out to U-tube, to ensure the intensity of U-tube；
Coolant liquid is filled into the multiple U-tube, in an embodiment according to the present invention, coolant liquid, which can be, to be had
The coolant liquid of antifreeze function, it is contemplated that ground cooling system circulating liquid medium needs to flow through the metal tubes inside current transformer, simultaneously
In view of winter shuts down the case where may cause icing, coolant liquid used in the present invention can be ethylene glycol antifreeze, wherein
Ethylene glycol antifreeze can be the mixture of ethylene glycol and pure water, and according to local temperature situation, adjustable ethylene glycol with
The mixed proportion of pure water, for example, making ethylene glycol and pure water with about 1:1 ratio mixing, mixture freezing point can be about-
45 DEG C, while suitable preservative, rust remover etc. can be added in coolant liquid (or anti-icing fluid).Coolant liquid can increase U-shaped
The whole gravity of pipe, is more easier down tube, and confirms whether U-tube has coolant liquid leakage；
After confirming coolant liquid No leakage, clump weight is bundled at the bent sub of U-tube, it is preferable that clump weight can be with
For the reinforcing bar of 8mm-15mm, deform to avoid pipeline during down tube；
The multiple U-tube is respectively placed in the multiple hole together with clump weight, it is preferable that use manpower down tube, one
Aspect people feel may determine that U-tube it is intact whether, on the other hand, manpower is also enough to make it fully in tripping in hole, is
Reduce hole wall bring resistance, casing when drilling can be retained, after be further taken out after the completion of down tube；
Into the multiple hole, grouting is to fill the gap between U-tube and hole wall, to fill between U-tube and borehole wall
Gap, make it have better heat transfer property.The smaller material of thermal resistivity can be used in packing material；
Finally, the opening of multiple U-tubes to be connected respectively to the first trunk line of ground cooling system 100 by triple valve
110 and second trunk line 120, and it is cooling that the first trunk line 110 and the second trunk line 120 be connected respectively to current transformer
Liquid outlet 11 and current transformer coolant inlet 12, are consequently formed described ground cooling system 100.
Although exemplary embodiment has been shown and described, it will be appreciated by those skilled in the art that not departing from
In the case where the principle and spirit of the invention, can modify to these embodiments, the scope of the present invention by claim and
Its equivalent limits.
Claims (7)
1. a kind of water-cooling heat radiating system for wind driven generator set converter, which is characterized in that the water-cooling heat radiating system packet
Ground cooling system (100) is included, described ground cooling system (100) includes the first trunk line (110), the second trunk line (120) and more
A tap line (210,220,230,240,250),
Wherein, first trunk line (110) by triple valve (311) connection current transformer cooling liquid outlet (11) and passes through three
Port valve (211,221,231,241) connects the entrance of the multiple tap line (210,220,230,240,250), so as to come from
The coolant liquid of current transformer (10) selective flows through first trunk line (110) and selectively flows into the multiple
It is one or more in tap line (210,220,230,240,250)；
Second trunk line (120) connect current transformer coolant inlet (12) and by triple valve (212,222,232,
242) outlet of the multiple tap line (210,220,230,240,250) is connected, so that from one or more
The coolant liquid of tap line (210,220,230,240,250) flows into current transformer (10)；
The multiple tap line (210,220,230,240,250) is embedded in underground along the vertical direction, so that in tap line
Coolant liquid and underground environment carry out heat exchange, wherein it is each in the multiple tap line (210,220,230,240,250)
The depth that a tap line protrudes into underground is different from each other；
The water-cooling heat radiating system further includes controller, and the controller is in response to the cooling at current transformer cooling liquid outlet (11)
The temperature of liquid is greater than the first predetermined temperature, and the depth for protruding into underground that control coolant liquid flows into ground cooling system (100) is the smallest
Tap line (210),
The controller is subsequently responsive to the temperature of the coolant liquid at current transformer cooling liquid outlet (11) and current transformer coolant liquid enters
The temperature difference between the temperature of coolant liquid at mouthful (12) is less than predetermined temperature difference target Continuous predetermined amount of time, control coolant liquid according to
Tap line protrudes into the sequence continuation of the depth of underground from small to large and successively flows into addition to the smallest branch line of the depth for protruding into underground
One or more tap lines except pipeline (210), until the temperature difference is greater than or equal to the predetermined temperature difference target.
2. water-cooling heat radiating system according to claim 1, which is characterized in that each tap line (210,220,
230,240,250) sequence of the depth of underground from small to large is protruded into according to tap line to be arranged.
3. water-cooling heat radiating system according to claim 1, which is characterized in that each tap line (210,220,
230,240,250) depth for protruding into underground is associated with underground mean temperature.
4. water-cooling heat radiating system according to claim 3, which is characterized in that each tap line (210,220,
230,240,250) depth for protruding into underground is also associated with the quantity of tap line.
5. water-cooling heat radiating system according to claim 1, which is characterized in that the multiple tap line (210,220,
It 230,240,250) is U-tube.
6. water-cooling heat radiating system according to claim 1, which is characterized in that the water-cooling heat radiating system further includes bypass pipe
The one end on road (330), the bypass line (330) connects current transformer cooling liquid outlet by bypass line triple valve (311)
(11), the other end of the bypass line connects current transformer coolant inlet (12),
The controller in response to the coolant liquid at current transformer cooling liquid outlet (11) temperature less than the second predetermined temperature, control
The bypass line triple valve (311), makes coolant liquid flow only through the bypass line (330), and flow back into current transformer
(10),
Wherein, first predetermined temperature is greater than second predetermined temperature.
7. a kind of method for the water-cooling heat radiating system for controlling wind driven generator set converter, the water-cooling heat radiating system includes cold
System (100), described ground cooling system (100) include the first trunk line (110), the second trunk line (120) and multiple branch lines
Pipeline (210,220,230,240,250), the first trunk line (110) connection are current transformer cooling liquid outlet (11) and described
The entrance of multiple tap lines (210,220,230,240,250), second trunk line (120) connect the multiple branch line
The outlet and current transformer coolant inlet (12) of pipeline (210,220,230,240,250), the multiple tap line (210,
220,230,240,250) it is embedded in underground along the vertical direction, and the multiple tap line (210,220,230,240,
250) depth that each tap line in protrudes into underground is different from each other, which is characterized in that the method includes：
It is greater than the first predetermined temperature in response to the temperature of the coolant liquid at current transformer cooling liquid outlet (11), control coolant liquid flows into
The smallest tap line of depth (210) for protruding into underground in ground cooling system (100), is subsequently responsive to current transformer cooling liquid outlet
(11) temperature difference between the temperature of the coolant liquid at and the temperature of the coolant liquid at current transformer coolant inlet (12) is less than predetermined
Temperature-difference target predetermined hold-time section, control coolant liquid protrude into the sequence of the depth of underground from small to large according to tap line and continue
Successively flow into one or more tap lines other than the smallest tap line of the depth for protruding into underground (210), Zhi Daosuo
The temperature difference is stated more than or equal to until the predetermined temperature difference target；
The method also includes：It is predetermined less than second warm in response to the temperature of the coolant liquid at current transformer cooling liquid outlet (11)
Degree, control coolant liquid flow back into current transformer (10) by bypass line (330), wherein one end of the bypass line (330) connects
It connecing current transformer cooling liquid outlet (11), the other end of the bypass line (330) connects current transformer coolant inlet (12),
In, first predetermined temperature is greater than second predetermined temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611257669.4A CN107343377B (en) | 2016-12-30 | 2016-12-30 | Water-cooling heat dissipation system of wind generating set converter and control and laying method thereof |
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|---|---|---|---|
| CN201611257669.4A CN107343377B (en) | 2016-12-30 | 2016-12-30 | Water-cooling heat dissipation system of wind generating set converter and control and laying method thereof |
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| CN107343377A CN107343377A (en) | 2017-11-10 |
| CN107343377B true CN107343377B (en) | 2018-11-20 |
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| CN101588701B (en) * | 2008-05-23 | 2012-08-08 | 华为技术有限公司 | Temperature control method and temperature control system of machine cabinet |
| CN202501648U (en) * | 2011-12-31 | 2012-10-24 | 徐霆生 | Ground source or water source cooling and heating system for onshore or offshore wind power generation facilities |
| CN103017279B (en) * | 2012-12-28 | 2015-05-20 | 上海交通大学 | Ground source heat-pipe heat exchange system adapting to load change in operation cycle and control method |
| CN105258395B (en) * | 2015-10-10 | 2017-08-01 | 西安交通大学 | A kind of combined type soil source heat pump system and control method |
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