CN101951067A - Heat radiation control method in water cooling system of aerogenerator - Google Patents
Heat radiation control method in water cooling system of aerogenerator Download PDFInfo
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- CN101951067A CN101951067A CN2010102524145A CN201010252414A CN101951067A CN 101951067 A CN101951067 A CN 101951067A CN 2010102524145 A CN2010102524145 A CN 2010102524145A CN 201010252414 A CN201010252414 A CN 201010252414A CN 101951067 A CN101951067 A CN 101951067A
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Abstract
The invention provides a heat radiation control method in a water cooling system of an aerogenerator. The method is realized by the following steps of: (1) arranging an air radiator to be perpendicular to a main air direction; (2) setting the critical temperature rise value per minute of the highest temperature of a converter through a PLC (Programmable Logic Controller); (3) further judging whether the converter is over-temperature because of air directions if the temperature rise is larger than the critical value; (4) outputting a signal stopping the positive cooling of a fan if the converter is over-temperature because of the air directions, delaying for a certain time and starting the reverse cooling of the fan by the PLC; (5) setting the critical temperature rise value of the highest temperature of the delayed converter by the PLC; (6) indicating temperature fall if the temperature rise is smaller than the critical value and keeping the current operation state of the fan; (7) recording a deviation position and setting a critical deviation value of the deviation position by the PLC; and (8) starting the position cooling of the fan if the deviation position deviates from the critical value.
Description
Technical field:
The present invention relates to a kind of wind-driven generator water-cooling system, relate in particular to the method for radiating control in a kind of wind turbine generator water-cooling system.
Background technology:
Domestic in recent years wind generating technology is flourish, is obtaining great advance aspect the maximization of unit, has occurred 1.5MW unit, 2MW unit, 3MW unit in succession, the 5MW unit will soon occur in future, even the above unit of 6MW.Along with the continuous increase of the power of the assembling unit, all must use more advanced converter technique, just large-scale switched power electronic device, so the heat dissipation problem of unit becomes the problem that unit maximizes and must face.
Because the maximization of unit causes heat dissipation problem to highlight, generally at present adopt water-cooling system to cool off to unit, this mode high efficiency, cost are low.In order to improve the radiating efficiency of water-cooling system, avoid the accumulation of temperature in unit inside, the radiator of water-cooling system must be put into the outside of unit, radiator has been exposed among the natural environment, will make that so the radiating effect of radiator seriously is subjected to the influence of surrounding environment, as temperature, wind direction influence.
Therefore, how effectively solving because of natural change of the wind causes the unit fault that heat dissipation problem causes, then is that problem to be solved is arranged in the prior art.
Summary of the invention:
In order to address the above problem, we provide the method for radiating control in a kind of wind turbine generator water-cooling system, this method realizes that the device that relates to has PLC, water-cooling system and current transformer, water-cooling system comprises trunk line filter, main circulation pump, electric heater, air radiator, degassing tank, flatulence jar, transmitter and ball valve, the method of described radiating control may further comprise the steps: 1) air radiator is put perpendicular to prevailing wind direction; 2) set the per minute temperature rise critical value of current transformer maximum temperature by PLC; 3) if temperature rise greater than critical value, further judge whether to cause the current transformer excess temperature because of the wind direction reason; 4) if wind direction causes the current transformer excess temperature, the signal of the cooling of PLC output stopping fan forward, the time-delay certain hour starts fan and oppositely cools off; 5) set the temperature rise critical value of the current transformer maximum temperature after the time-delay by PLC; 6) if temperature rise, illustrates temperature less than critical value to descend, keep the aforementioned running status of fan; 7), set the critical value of driftage position deviation by PLC record driftage position; 8) if described driftage position deviation critical value starts described fan forward.
In the said method, if the temperature rise after the described time-delay is switched back original operating state during greater than critical value, being rotated in the forward of fan of recovery cooled off;
In the said method,, produce wind direction signals and described signal is sent to described PLC by the closure disconnection of wind direction switch.
In the said method, described wind direction switch forward K switch 1 disconnects, and when reverser K2 was closed, it was reverse to be judged as starting fan.
5, cooling control method according to claim 3 is characterized in that, described K1 closure when K2 disconnects, is the starting fan forward absolutely.
6, cooling control method according to claim 3 is characterized in that described K1 closure, when K2 is closed, is judged as the wind direction switch fault.
7, cooling control method according to claim 3 is characterized in that, described K1 disconnects, and when K2 disconnects, judges that wind speed does not influence heat radiation.
Description of drawings
Air radiator working state figure in Fig. 1 prior art
All the time the working state figure of radiator among Fig. 2 the present invention
Fig. 3 controls the electrical schematic diagram of motor positive and inverse
Embodiment:
Describe the preferred embodiments of the present invention in detail below in conjunction with accompanying drawing.
Referring to Fig. 1, existing water-cooling system adopts the mode forced air of one-sided decompression to flow through radiator, play the effect of heat radiation, but shortcoming is to be subjected to the influence that wind direction and wind velocity changes easily, when the mobile direction of radiator fan forced draft is opposite with wind direction, the radiating effect of radiator will have been had a greatly reduced quality, when serious only quite with 60% of normal radiating effect.In addition, because blower fan generally all is that existing cooling system is subjected to the obstruction of foreign material such as willow catkins flying in the air easily in the field, wilderness, have a strong impact on the effect of heat radiation.
With reference to Fig. 2, the present invention puts air radiator perpendicular to prevailing wind direction, on the basis of existing water-cooling system, increases the function (program and wind direction switch are judged wind direction) of the judgement of wind direction, increases the function of control cooling system fan electromotor rotating work.
With reference to Fig. 3, PLC increases digital quantity output port OX.1, OX.2, OX.3, OX.4, OX.5, input port IX.1, IX.2, IX.3; Be used for control contactor, to realize the rotating of fan;
1, Kx1, Kx2 realize the rotating of fan for the continuous mutually contactor of conversion;
2, Q1, Q2, Q3 are the overload protection circuit breaker;
3, M1, M2, M3 are the motor of three radiator fans;
4, K1, K2 are wind direction switch (the positive wind direction of K1, K2 inverted ventilation to);
5, K5, K6, K7 are for controlling the contactor of fan work respectively;
6, PLC output port OX.1 is the contactor Kx1 of control fan forward;
7, PLC output port OX.2 is the contactor Kx2 of control fan forward;
8, PLC output port OX.3 is by K5 control fan M1;
9, PLC output port OX.4 is by K6 control fan M2;
10, PLC output port OX.5 is by K7 control fan M3;
11, PLC input port IX.1 judges positive wind direction by K1;
12, PLC input port IX.2 by K2 judge inverted ventilation to;
13, PLC input port IX.3 judges the fan reverse mode by Kx2;
Mode of operation 1:K1 action, IX.1 receives the wind direction forward signal, then OX.1 exports fan forward working signal, the Kx1 adhesive, and PLC controls three change oar motor M 1, M2, M3 start and stop respectively according to current transformer temperature conditions same OX.3, OX.4, OX.5, K5, K6, K7 excessively; Be fan forward mode of operation this moment.
Mode of operation 2:K2 action, IX.2 receives the wind direction reverse signal, then OX.2 output fan is anti-
The present invention by the control break motor turn to, adopt multiple motor wheel follow startup (or the startup of variable frequency control motor, turn to, the mode of rotating speed) mode, it is consistent that the wind direction of the wind direction of nature and radiator is remained, to reach cooling system dynamic temperature-regulating purpose of energy saving.The Rule of judgment of wherein controlling the motor conversion is the key of problem, and two kinds of embodiment are arranged.
First kind of embodiment be, internal processes is judged wind direction according to available data, because only increase program judges, so cost is minimum, and concrete grammar is as follows:
If 1 ambient temperature greater than 28 ° and current transformer temperature greater than 61 ° and wind speed greater than 12m/s, the situation of current transformer excess temperature may appear;
2, whether then detect the per minute temperature rise of maximum temperature of current transformer greater than 2 °, if if this value is Ts Ts＞=2 ° or current transformer maximum temperature＞=65, further judge the possibility that the current transformer excess temperature is arranged, and be because the reason of wind direction causes, the cooling of PLC output stopping fan forward, time-delay 1.5s starts fan and oppositely cools off;
3, whether temperature rise is established this value and is Tj smaller or equal to 0 ° in 1.5 clocks of the maximum temperature of detection current transformer,
If Tj, illustrates temperature less than 0 ° and descends, keep this running status of fan, otherwise, switch back original operating state, reply being rotated in the forward of fan and cool off; Take measures, judge whether the current transformer excess temperature that causes because of the wind direction reason, if then keep this running status;
4, write down present driftage position this moment, establish at this moment that the position is Pn, when departing from Pn, or when not satisfying any one condition in the step 1, then change the fan rotation direction type of cooling greater than 80 °.
Second kind of embodiment judges wind direction by blast switch (blast switch is a kind of according to wind direction, the different devices that change on off operating mode of blast), thereby selects different control modes, to reach energy-conservation and to improve radiating efficiency.The latter is more direct more efficient, and the former more saves cost.
Judge the explanation of wind direction about second method: on the basis of first method, can increase the input of the digital quantity of a PLC, be used for judging whether to reach the condition of radiator motor reverse operation, also can remove inner programmed logic and judge, realize above-mentioned function.
By the judgement to different wind directions, the work of the Direct/Reverse of control radiator fan is consistent radiator fan forced draft direction all the time with natural wind, utilize the energy of natural wind to increase radiating effect greatly so on the one hand; Can be caused the obstruction of cooling system that certain cleaning effect is arranged to willow catkins flying in the air on the other hand, can not make willow catkins flying in the air that long-term accumulation is arranged.
The present invention can effectively solve the problem that the radiating efficiency of the cooling system that the change because of wind direction causes reduces, and reduces the energy consumption of cooling system, utilizes natural wind energy fully, improves the utilization ratio of the electric energy of cooling system, plays energy-conservation effect simultaneously.Can reduce the energy consumption of cooling system greatly, improve the generating efficiency of wind turbine generator.
Claims (7)
1. the method for radiating control in the wind turbine generator water-cooling system, this method realizes that the device that relates to has PLC, water-cooling system and current transformer, water-cooling system comprises trunk line filter, main circulation pump, electric heater, air radiator, degassing tank, flatulence jar, transmitter and ball valve, it is characterized in that, the method of described radiating control may further comprise the steps: 1) air radiator is put perpendicular to prevailing wind direction; 2) set the per minute temperature rise critical value of current transformer maximum temperature by PLC; 3) if temperature rise greater than critical value, further judge whether to cause the current transformer excess temperature because of the wind direction reason; 4) if wind direction causes the current transformer excess temperature, the signal of the cooling of PLC output stopping fan forward, the time-delay certain hour starts fan and oppositely cools off; 5) set the temperature rise critical value of the current transformer maximum temperature after the time-delay by PLC; 6) if temperature rise, illustrates temperature less than critical value to descend, keep the aforementioned running status of fan; 7), set the critical value of driftage position deviation by PLC record driftage position; 8) if described driftage position deviation critical value starts described fan forward.
2. cooling control method according to claim 1 is characterized in that, if the temperature rise after the described time-delay is switched back original operating state during greater than critical value, being rotated in the forward of fan of recovery cooled off;
3. cooling control method according to claim 2 is characterized in that, by the closure disconnection of wind direction switch, produces wind direction signals and described signal is sent to described PLC.
4. cooling control method according to claim 3 is characterized in that, described wind direction switch forward K switch 1 disconnects, and when reverser K2 was closed, it was reverse to be judged as starting fan.
5. cooling control method according to claim 3 is characterized in that, described K1 closure when K2 disconnects, is judged as the starting fan forward.
6. cooling control method according to claim 3 is characterized in that, described K1 closure when K2 is closed, is judged as the wind direction switch fault.
7. cooling control method according to claim 3 is characterized in that, described K1 disconnects, and when K2 disconnects, judges that wind speed does not influence heat radiation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102524145A CN101951067A (en) | 2010-08-13 | 2010-08-13 | Heat radiation control method in water cooling system of aerogenerator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102524145A CN101951067A (en) | 2010-08-13 | 2010-08-13 | Heat radiation control method in water cooling system of aerogenerator |
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| CN101951067A true CN101951067A (en) | 2011-01-19 |
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| CN2010102524145A Pending CN101951067A (en) | 2010-08-13 | 2010-08-13 | Heat radiation control method in water cooling system of aerogenerator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111966147A (en) * | 2020-08-31 | 2020-11-20 | 华通科技有限公司 | High-temperature integral heat dissipation system of robot |
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| CN111966147A (en) * | 2020-08-31 | 2020-11-20 | 华通科技有限公司 | High-temperature integral heat dissipation system of robot |
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Application publication date: 20110119 |