CN103353773A - Adjusting method of converter valve water cooling system cooling water temperature and system thereof - Google Patents
Adjusting method of converter valve water cooling system cooling water temperature and system thereof Download PDFInfo
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Abstract
An adjusting method of a converter valve water cooling system cooling water temperature and a system thereof are disclosed. The system comprises a real-time regulator, a PID regulator and an adder. Real-time adjusting and PID closed loop control are combined so as to adjust a cooling water temperature. A real-time adjusting mode is used to output an adjusting value in real time through the real-time regulator according to an inlet valve temperature. A PID closed loop control mode is used. Firstly, the PID regulator is used to set an expected inlet valve temperature; then a comparator is used to compare an actual inlet valve temperature with the set temperature and a comparison result is input to a PID controller so as to carry out calculation; finally, a sum of a calculation result an adjusting value output by the real-time regulator is acquired through the adder and then a rotation speed of a fan is controlled. In the prior art, open loop adjusting can only be performed during water temperature adjusting and the water temperature can not be stable at a set point, or only the PID closed loop control is performed and the water temperature which is far away from the set point can not be adjusted. By using the method of the system of the invention, the above problems are solved. The method and the system are especially suitable for the water temperature control of the converter valve water cooling system.
Description
Technical field
The present invention relates to domain of control temperature, specifically the control method of converter valve water-cooling system cooling water temperature.
Background technology
Converter valve can produce a large amount of heat when operation, need the configuration cooling system to be its cooling, to prevent the aging of element, guarantees the normal operation of converter valve.Water-cooling system is exactly one of effective cooling method, and the temperature of the chilled water by regulating water-cooling system is controlled the heat radiation of converter valve.Existing cooling water temperature regulative mode mainly adopts the regulative mode of cooling water temperature and cooling effect direct correlation, i.e. the high reinforcement of cooling water temperature cooling effect, and temperature is hanged down and is then weakened cooling effect.Because cooling effect and coolant water temperature are in the same way, this regulative mode can be accomplished the slow variation of cooling water temperature, avoids converter valve cooling water channel joint suddenly cold and hot and the distortion that produces is leaked.Because cooling effect is all brought into play when can set water temperature being higher than certain value, so can effectively avoid the water temperature overtemperature.
A kind of engine water temperature control system that is applied to electric automobile is disclosed among the existing patent documentation CN102102580A, this system is by monitoring engine speed data, determine stopping and starting of cooling fan, after coolant temperature is higher than certain value, directly with the setting signal of temperature signal as rotating speed, namely the temperature height improves rotating speed, the temperature sinking slow-speed of revolution, cooling effect is identical with the coolant temperature action direction, thereby with coolant temperature control within the specific limits.But, the dynamic perfromance existing problems of this scheme control coolant temperature, temperature variation is fast when easily causing low temperature, and this adjustment belongs to adjusted open loop, coolant temperature can not be according to the operation of design temperature point, and along with the variation of environment temperature and the speed of a motor vehicle, coolant temperature can change.
A kind of heating network water temperature regulation and control system is disclosed among the existing patent documentation CN202734050U, this system compares pipe network water temperature and the design temperature that gathers, carry out computing via the PID controller again, the regulating electric valve, so that heating network has reduced temperature fluctuation in the operation of design temperature point.But this scheme does not consider that the situation of great fluctuation process appears in water temperature, if the actual water temperature value from set temperature value away from, then PID controller output maximal value or minimum value, regulating action is very limited, is difficult to guarantee to move according to design temperature.And converter valve cooling system not only the variation of ambient temperature scope is very large, and also there is larger variation in the heating power of converter valve, start and stop and high-power and miniwatt operation such as converter valve, these situations all need control system reasonably to process, so that temperature maintains on the set point as far as possible, also to try one's best slowly even change.
Summary of the invention
For this reason, technical matters to be solved by this invention is that water temperature of the prior art is regulated and only carries out adjusted open loop and can't be with water temperature stability at set point, perhaps only carry out the PID closed-loop control and but can't regulate from the problem of the water temperature of design temperature point away from, thereby propose a kind ofly can slow down that water temperature changes and with the control method that be used for converter valve water-cooling system cooling water temperature of water temperature stability at set point.
For solving the problems of the technologies described above, the invention provides a kind of control method and system of converter valve water-cooling system cooling water temperature.The control method of converter valve water-cooling system cooling water temperature will be regulated in real time to combine with the PID closed-loop control cooling water temperature will be regulated, and may further comprise the steps:
(1) adopt real-time regulative mode to export in real time regulated value by real-time regulator according to advancing the valve temperature;
(2) adopt the PID close-loop control mode to advance the valve temperature by what the PID regulator was set expection first, then advance after valve temperature and design temperature compare actual by comparer, the fiducial value input PID controller that draws is carried out computing, at last operation result and the regulated value of in real time regulator output are got and controlled afterwards the rotating speed of fan by totalizer.
Described real-time regulative mode is the main regulation mode, and described PID close-loop control mode is the auxiliary adjustment mode.
Described real-time regulative mode is: when advancing begins to start cooling fan when the valve temperature rises to default initial temperature, temperature rising rotation speed of the fan increases, when temperature increases to the predetermined limit temperature, and regulator output maximal value, be completely frequently operation of fan, it is maximum that cooling effect reaches.
Described default initial temperature is between 20-30 degree centigrade, and described ultimate temperature is between 40-50 degree centigrade.
Described PID close-loop control mode is: carry out periodic samples to advancing the valve temperature, and averaged periodically, then enter the PID controller after comparing and carry out computing with advancing the valve desired temperature, output is controlled at ± 20% in.
The sampling period of described periodic samples is 3-5 between second, and the cycle of described averaged is 25-35 between second, and the cycle of described averaged is the integral multiple in described sampling period.
By the amplitude limit module amplitude limit is carried out in the output of PID controller, output is controlled at ± 20% in.
The regulating system of converter valve water-cooling system cooling water temperature comprises:
Real-time regulator: export in real time regulated value according to advancing the valve temperature, the variation of this regulated value and the variation of advancing the valve temperature are in the same way;
PID regulator: comprise comparer and PID controller, the output terminal of comparer is connected with the input end of PID controller, described comparer periodically advances valve temperature and design temperature relatively with actual, then the fiducial value input PID controller that draws is carried out computing, and the output operation result;
Totalizer: be connected output terminal with the PID regulator with described real-time regulator and be connected, with regulated value and the operation result of PID regulator output of real-time regulator output get with, control afterwards the rotating speed of fan.
Described PID regulator also comprises the amplitude limit module, is connected with the output terminal of PID controller, and the operation result of PID controller is exported afterwards through amplitude limit.
Technique scheme of the present invention has the following advantages compared to existing technology:
(1) control method of converter valve water-cooling system cooling water temperature of the present invention will be regulated in real time to combine with the PID closed-loop control cooling water temperature will be regulated, adopt real-time regulative mode to export in real time regulated value by real-time regulator according to advancing the valve temperature, the variation of this regulated value and the variation of advancing the valve temperature are in the same way; Adopt the PID close-loop control mode to advance the valve temperature by what the PID regulator was set expection first, then advance after valve temperature and design temperature compare actual by comparer, the fiducial value input PID controller that draws is carried out computing, at last operation result and the regulated value of in real time regulator output are got and controlled afterwards the rotating speed of fan by totalizer.Advance like this valve temperature when high cooling effect strengthen, advance the valve temperature when low cooling effect weaken, simultaneously the adjusting of design temperature point become sharp, and the technician can be according to the suitable desired temperature of the concrete requirements set of system, in the situation that environment temperature, load variations, both can accomplish the slow variation of cooling water temperature, the distortion of avoiding converter valve cooling water channel joint suddenly cold and hot and producing is leaked, can make again into the valve temperature and progressively be stabilized to the design temperature point, even change, change also very slow, the stability of Effective Raise system operation;
(2) control method of converter valve water-cooling system cooling water temperature of the present invention, when advancing begins to start cooling fan when the valve temperature rises to default initial temperature, temperature rising rotation speed of the fan increases, when temperature increases to the predetermined limit temperature, regulator output maximal value, i.e. completely frequently operation of fan, it is maximum that cooling effect reaches, so in the situation that meet design requirement, advance the valve temperature and can not surpass preset limit value, thereby realize that cooling water temperature does not exceed standard;
(3) control method of converter valve water-cooling system cooling water temperature of the present invention, described default initial temperature is between 20-30 degree centigrade, described ultimate temperature is between 40-50 degree centigrade, the technician can according to the concrete requirements set of system suitable initial temperature and ultimate temperature, reach the effect of effective control range of temperature;
(4) control method of converter valve water-cooling system cooling water temperature of the present invention, by the amplitude limit module amplitude limit is carried out in the output of PID controller, output is controlled at ± 20% in, thereby the regulating action of PID regulator is limited within the specific limits, play the auxiliary adjustment effect, realize that cooling water temperature moves according to design temperature.
Description of drawings
For content of the present invention is more likely to be clearly understood, the below according to a particular embodiment of the invention and by reference to the accompanying drawings, the present invention is further detailed explanation, wherein
Fig. 1 is the structural representation of the regulating system of the converter valve water-cooling system cooling water temperature that provides of embodiment 1;
Fig. 2 is the structural representation of the regulating system of the converter valve water-cooling system cooling water temperature that provides of embodiment 2.
Embodiment
Embodiment 1
The present embodiment provides a kind of control method of converter valve water-cooling system cooling water temperature, and will regulate in real time combines with the PID closed-loop control regulates cooling water temperature, may further comprise the steps:
(1) adopt real-time regulative mode to export in real time regulated value by real-time regulator according to advancing the valve temperature, identical with disclosed real-time regulative mode among the documents CN102102580A, when advancing the rising of valve temperature, regulated value increases, rotation speed of the fan increases, and cooling effect is strengthened; Otherwise when advancing the valve drop in temperature, regulated value reduces, and rotation speed of the fan reduces, and cooling effect weakens;
(2) adopt the PID close-loop control mode to advance the valve temperature t by what the PID regulator was set expection first
0, expection advances the valve temperature t in the present embodiment
0Be 35 degrees centigrade, then by comparer with actual advance valve temperature and expection advance the valve temperature t
0After comparing, the fiducial value input PID controller that draws is carried out computing, the PID controller is to carry out ratio, integration, differentiate according to the fiducial value that system inputs, operation result in the present embodiment and the proportional relation of described fiducial value are if actually advance the valve temperature and advance the valve temperature t greater than expection
0, then operation result be on the occasion of, otherwise, advance the valve temperature and advance the valve temperature t less than expection when actual
0The time, operation result is negative value, at last operation result and the regulated value of in real time regulator output is got with afterwards by totalizer, converts the rotating speed of the signal controlling fan of regulating rotation speed of the fan to.
As embodiment that can conversion, the valve temperature of advancing of described expection arranges according to the needs of cooling system, and operated by rotary motion is about 35-40.
The regulating system of the converter valve water-cooling system cooling water temperature that the present embodiment is corresponding comprises as shown in Figure 1:
Real-time regulator: export in real time regulated value according to advancing the valve temperature, the variation of this regulated value and the variation of advancing the valve temperature are in the same way;
PID regulator: comprise comparer and PID controller, the output terminal of comparer is connected with the input end of PID controller, described comparer periodically advances valve temperature and design temperature relatively with actual, then the fiducial value input PID controller that draws is carried out computing, and the output operation result;
Totalizer: be connected output terminal with the PID regulator with described real-time regulator and be connected, regulated value and the operation result of PID regulator output of real-time regulator output got and controlled afterwards the rotating speed of fan.
Embodiment 2
The present embodiment provides a kind of control method of converter valve water-cooling system cooling water temperature, and will regulate in real time combines with the PID closed-loop control regulates cooling water temperature, may further comprise the steps:
(1) adopts real-time regulative mode to export in real time regulated value by real-time regulator according to advancing the valve temperature, rise to default initial temperature t when advancing the valve temperature
1In the time of=25 degrees centigrade, regulated value begins to start cooling fan this moment since 0 increase, and temperature rising rotation speed of the fan increases, when temperature rises to the predetermined limit temperature t
2In the time of=45 degrees centigrade, regulator output maximal value, i.e. completely frequently operation of fan, it is maximum that cooling effect reaches; Otherwise when advancing the valve drop in temperature, regulated value reduces, and rotation speed of the fan reduces, until during drop in temperature to 25 degree centigrade, fan cuts out;
(2) adopting the PID close-loop control mode to set the valve temperature of advancing of expecting by the PID regulator first is 38 degrees centigrade, and advance per 3 seconds once sampling of valve temperature, ask for mean value in per 30 seconds and obtain the described actual valve temperature of advancing, then actually advance after 38 degrees centigrade of valve temperature and design temperatures compare described by comparer, the fiducial value input PID controller that draws is carried out computing, operation result in the present embodiment and the proportional relation of described fiducial value, if actual to advance the valve temperature be 40 degrees centigrade, then operation result be on the occasion of, otherwise, when actual when advancing the valve temperature and being 36 degrees Celsius, operation result is negative value, and by the amplitude limit module amplitude limit is carried out in the output of PID controller, output is controlled at ± 20% in, at last the operation result behind the amplitude limit and the regulated value of in real time regulator output are got with afterwards by totalizer, converted to the rotating speed of the signal controlling fan of regulating rotation speed of the fan.
The maximal value of above-mentioned real-time regulative mode output is 100%, is the main regulation mode, the output of described PID close-loop control mode is controlled at ± 20% in, be the auxiliary adjustment mode.
As other can conversion embodiment, described default initial temperature t
1Can arrange as required, be set to 20 ℃, 28 ℃ or 30 ℃ as selecting; Described predetermined limit temperature t
2Also can arrange as required, be set to 40 ℃, 47 ℃ or 50 ℃ as selecting.Sampling period also can be chosen as 5s, and the cycle of averaged is chosen as 25s or 35s.
The regulating system of the converter valve water-cooling system cooling water temperature that the present embodiment is corresponding comprises as shown in Figure 2:
Real-time regulator: export in real time regulated value according to advancing the valve temperature, when advancing the valve temperature and rise to 25 degrees centigrade, regulated value increases since 0, and temperature rising regulated value increases, when temperature rises to 45 degrees centigrade, and regulator output maximal value;
PID regulator: comprise comparer, PID controller and amplitude limit module, the output terminal of comparer is connected with the input end of PID controller, per 30 seconds of described comparer advances valve temperature and design temperature more once with actual, then the fiducial value input PID controller that draws is carried out computing, and by the amplitude limit module amplitude limit is carried out in the output of PID controller, output is controlled at ± 20% in;
Totalizer: be connected output terminal with the PID regulator with described real-time regulator and be connected, regulated value and the operation result of PID regulator output of real-time regulator output got and controlled afterwards the rotating speed of fan;
Amplitude limit module: be connected with the output terminal of PID controller, the operation result of PID controller is exported afterwards through amplitude limit.
Obviously, above-described embodiment only is for example clearly is described, and is not the restriction to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give all embodiments exhaustive.And the apparent variation of being extended out thus or change still are among the protection domain of the invention.
Claims (9)
1. the control method of a converter valve water-cooling system cooling water temperature is characterized in that, will regulate in real time combines with the PID closed-loop control regulates cooling water temperature, may further comprise the steps:
(1) adopt real-time regulative mode to export in real time regulated value by real-time regulator according to advancing the valve temperature;
(2) adopt the PID close-loop control mode to advance the valve temperature by what the PID regulator was set expection first, then advance after valve temperature and design temperature compare actual by comparer, the fiducial value input PID controller that draws is carried out computing, at last operation result and the regulated value of in real time regulator output are got and controlled afterwards the rotating speed of fan by totalizer.
2. the control method of converter valve water-cooling system cooling water temperature according to claim 1 is characterized in that, described real-time regulative mode is the main regulation mode, and described PID close-loop control mode is the auxiliary adjustment mode.
3. the control method of converter valve water-cooling system cooling water temperature according to claim 1 and 2, it is characterized in that, described real-time regulative mode is: when advancing begins to start cooling fan when the valve temperature rises to default initial temperature, temperature rising rotation speed of the fan increases, when temperature increases to the predetermined limit temperature, regulator output maximal value, i.e. completely frequently operation of fan, it is maximum that cooling effect reaches.
4. the control method of the described converter valve water-cooling system of arbitrary claim cooling water temperature is characterized in that according to claim 1-3, and described default initial temperature is between 20-30 degree centigrade, and described ultimate temperature is between 40-50 degree centigrade.
5. the control method of the described converter valve water-cooling system of arbitrary claim cooling water temperature according to claim 1-4, it is characterized in that, described PID close-loop control mode is: carry out periodic samples to advancing the valve temperature, and periodicity averaged, then enter the PID controller after comparing and carry out computing with advancing the valve desired temperature, output is controlled at ± 20% in.
6. the control method of the described converter valve water-cooling system of arbitrary claim cooling water temperature according to claim 1-5, it is characterized in that, the sampling period of described periodic samples is that 3-5 is between second, the cycle of described averaged is 25-35 between second, and the cycle of described averaged is the integral multiple in described sampling period.
7. the control method of the described converter valve water-cooling system of arbitrary claim cooling water temperature is characterized in that according to claim 1-6, by the amplitude limit module amplitude limit is carried out in the output of PID controller, output is controlled at ± 20% in.
8. the regulating system of a converter valve water-cooling system cooling water temperature is characterized in that, comprising:
Real-time regulator: export in real time regulated value according to advancing the valve temperature, the variation of this regulated value and the variation of advancing the valve temperature are in the same way;
PID regulator: comprise comparer and PID controller, the output terminal of comparer is connected with the input end of PID controller, described comparer periodically advances valve temperature and design temperature relatively with actual, then the fiducial value input PID controller that draws is carried out computing, and the output operation result;
Totalizer: be connected output terminal with the PID regulator with described real-time regulator and be connected, with regulated value and the operation result of PID regulator output of real-time regulator output get with, control afterwards the rotating speed of fan.
9. the regulating system of converter valve water-cooling system cooling water temperature according to claim 8 is characterized in that, described PID regulator also comprises the amplitude limit module, is connected with the output terminal of PID controller, and the operation result of PID controller is exported afterwards through amplitude limit.
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| CN107664058A (en) * | 2016-07-28 | 2018-02-06 | 长城汽车股份有限公司 | Method for controlling cooling system, system and the vehicle of engine |
| CN112130452A (en) * | 2020-09-25 | 2020-12-25 | 江苏方天电力技术有限公司 | Control method for preventing rotor cooling water temperature of double-water internal cooling phase modifier from being excessively adjusted |
| CN112145469A (en) * | 2020-09-25 | 2020-12-29 | 江苏方天电力技术有限公司 | Phase modulator cooling air temperature control method |
| CN112731796A (en) * | 2020-09-25 | 2021-04-30 | 江苏方天电力技术有限公司 | Control method for inhibiting influence of start-stop cooling fan on cooling water temperature of stator of camera |
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| CN112731796A (en) * | 2020-09-25 | 2021-04-30 | 江苏方天电力技术有限公司 | Control method for inhibiting influence of start-stop cooling fan on cooling water temperature of stator of camera |
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