CN113961023B - Temperature control system based on dry-type transformer - Google Patents
Temperature control system based on dry-type transformer Download PDFInfo
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- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/1927—Control of temperature characterised by the use of electric means using a plurality of sensors
- G05D23/193—Control of temperature characterised by the use of electric means using a plurality of sensors sensing the temperaure in different places in thermal relationship with one or more spaces
- G05D23/1931—Control of temperature characterised by the use of electric means using a plurality of sensors sensing the temperaure in different places in thermal relationship with one or more spaces to control the temperature of one space
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Abstract
The invention relates to a temperature control system based on a dry-type transformer, in particular to the technical field of transformer temperature control, which comprises an acquisition module, a processing module and a control module, wherein the acquisition module is used for acquiring historical temperature data and real-time temperature data of a winding of the dry-type transformer and is connected with the processing module; the checking module is used for checking the real-time temperature data according to the historical temperature data and generating a checking result, and is connected with the judging module; the judging module is used for judging the safety of the dry-type transformer according to the checking result and generating a judging result, and is connected with the alarm module; the alarm module is used for alarming according to the judgment result; the checking module compares the winding temperature T acquired in real time with a preset value to judge whether checking is carried out or not, and when checking is needed, the checking module checks the winding temperature T according to the average temperature Delta T of the winding in a checking time period. The invention effectively prolongs the service life of the dry-type transformer.
Description
Technical Field
The invention relates to the technical field of transformer temperature control, in particular to a temperature control system based on a dry-type transformer.
Background
Dry-type transformers are widely used in local lighting, high-rise buildings, airports, wharf CNC machines and other places, and simply, dry-type transformers refer to transformers in which iron cores and windings are not immersed in insulating oil. The over-high temperature of the dry-type transformer greatly affects the service life of the transformer, and serious accidents such as transformer damage, transformer failure and even burning fire of the transformer can be caused due to the over-high temperature, so the temperature rise of the transformer is a necessary control standard in the power industry.
Chinese patent publication No.: CN106598118B discloses a temperature and humidity control system for a dry-type transformer, which only controls the on/off and trip of a fan according to the temperature of a winding when controlling the temperature, and this hard control method cannot realize accurate control of the temperature, and still affects the service life of the transformer.
Disclosure of Invention
Therefore, the invention provides a temperature control system based on a dry-type transformer, which is used for solving the problem of short service life of the dry-type transformer caused by the fact that the winding temperature cannot be accurately controlled in the prior art.
To achieve the above objects, the present invention provides a temperature control system based on a dry type transformer, comprising,
the acquisition module is used for acquiring historical temperature data and real-time temperature data of a winding of the dry-type transformer and is connected with the processing module;
the checking module is used for checking the real-time temperature data according to the historical temperature data and generating a checking result, and is connected with the judging module;
the judging module is used for judging the safety of the dry-type transformer according to the checking result and generating a judging result, and is connected with the alarm module;
the alarm module is used for alarming according to the judgment result;
when the temperature of the dry-type transformer is controlled, the calibration module compares the winding temperature T acquired in real time with a preset value to judge whether calibration is carried out or not, when the calibration is needed, the calibration module calibrates the winding temperature T according to the average temperature Delta T of the winding in a calibration time period, after the calibration is finished, the judgment module carries out safety judgment on the dry-type transformer according to the corrected winding temperature Ti and controls the fan to cool, after the setting of the fan rotating speed is finished, the judgment module adjusts the fan rotating speed according to the slope K of a temperature change curve, and after the adjustment is finished, the judgment module corrects the adjusted fan rotating speed according to the indoor temperature Tk.
Further, when the winding temperature is checked, the checking module firstly obtains the real-time winding temperature T, compares the real-time winding temperature T with each preset temperature, and judges whether to check according to the comparison result, wherein,
when T is less than T01, the checking module judges that the winding temperature is normal and does not need checking;
when T is more than or equal to T01 and is less than T02, the checking module judges that the winding temperature is high, starts the fan to cool, and checks the real-time winding temperature T;
when T is larger than or equal to T02, the checking module judges that the temperature is too high and controls the switch to trip, and checking is not needed;
wherein, T01 is the first preset winding temperature, T02 is the second preset winding temperature, and T01 is less than T02.
Further, when the verification module verifies the winding temperature T, the verification module is provided with a verification time period, the verification time period is T0 time before a verification time node, T0 is a preset value, and the unit of T0 is minutes, the verification module obtains a temperature change curve in the verification time period, the temperature change curve is drawn according to the temperature of each time node in the verification time period, the average temperature Δ T of the winding in the verification time period is obtained, and the verification module compares the winding temperature T with the average temperature Δ T and verifies according to the comparison result.
Further, when T is less than delta T, if the temperature change curve is in a descending trend, the checking module judges that the winding temperature is normal; if the temperature change curve is in a rising trend, the checking module judges that the winding temperature is abnormal, corrects the winding temperature T to be T1, sets T1 to be 0.5 x (delta T + Tmax), and the Tmax is the maximum temperature value in the temperature change curve; if the temperature is unchanged in the verification time period, the verification module conducts verification according to the temperature variation Ta and sets Ta to be | T-Delta T |; and when T is equal to delta T, the checking module judges that the winding temperature is normal.
Further, when T > [ delta ] T, if the temperature change curve is in an ascending trend, the checking module judges that the winding temperature is normal; if the temperature change curve is in a descending trend, the checking module judges that the winding temperature is abnormal, corrects the winding temperature T to be T2, sets T2 to be 0.5 x (delta T + Tmin), and Tmin is the minimum temperature value in the temperature change curve; and if the temperature is not changed in the verification time period, the verification module performs verification according to the temperature variation Ta.
Further, when the temperature does not change within the verification time period, the verification module compares the calculated temperature variation Ta with a preset temperature variation Ta0, and verifies the winding temperature T according to the comparison result, wherein,
when Ta is less than or equal to Ta0, the checking module judges that the winding temperature is normal;
when Ta is greater than Ta0, the verification module judges that the winding temperature is abnormal, corrects the winding temperature T to T3, and sets T3 to delta T +/-Ta 0.
Further, after the checking module finishes checking the winding temperature T, the judging module compares the corrected winding temperature Ti with each preset correction temperature, sets i to 1,2, and 3, and judges the safety of the dry-type transformer according to the comparison result, wherein,
when the T01 is not less than Ti and is less than T11, the judging module judges that the dry-type transformer has low risk and adjusts the rotating speed of the fan to V1;
when the T11 is not less than the value that Ti is less than T12, the judgment module judges the risk in the dry type transformer and adjusts the rotating speed of the fan to be V2;
when the T12 is not less than Ti and is less than T02, the judging module judges that the dry-type transformer has high risk and adjusts the rotating speed of the fan to V3;
wherein T11 is a first preset correction temperature, T12 is a second preset correction temperature, and T11 is more than T12; v1 is the first preset fan speed, V2 is the second preset fan speed, V3 is the third preset fan speed, V1 < V2 < V3.
Furthermore, a fan rotating speed relational expression is also arranged in the judging module, wherein V1 is a preset value, and is set,
V2＝V1+V1×(Ti-T11)/Ti，
V3＝V2+V2×(Ti-T12)/T12，
when V3 is larger than or equal to Vmax, the Vmax is taken as the rotating speed of the fan, and the Vmax is the maximum rotating speed of the fan.
Further, after the determination module completes setting of the fan rotation speed, the determination module obtains the slope K of the temperature change curve, compares the slope K of the temperature change curve with each preset slope, and adjusts the fan rotation speed Vi according to the comparison result, and sets i to 1,2, and 3, wherein,
when K is less than 0, the judging module compares the slope K of the temperature change curve with a first preset slope K1, and when K is less than K1, the judging module adjusts the fan rotating speed Vi to Va1, sets Va1 to Vi multiplied by a1, sets a1 to be a first adjusting coefficient, and sets a1 to be less than 1 and is more than 0.9; when K is more than or equal to K1, no adjustment is carried out;
when K is 0, no adjustment is performed;
when K is greater than 0, the judging module compares the slope K of the temperature change curve with a second preset slope K2, and when K is greater than K2, the judging module adjusts the fan rotating speed Vi to Va2, sets Va2 to Vi multiplied by a2, sets a2 to be a second adjusting coefficient, and sets a value which is greater than 1 and less than a1 and less than 1.1; when K is less than or equal to K2, no adjustment is carried out;
wherein, K1 is a first preset slope, K2 is a second preset slope, and K1 is more than 0 and less than K2.
Further, after the fan rotation speed Vi is adjusted, the determining module obtains the indoor temperature Tk, compares the indoor temperature Tk with the corrected winding temperature Ti, and corrects the adjusted fan rotation speed Vaj according to the comparison result, and sets j to 1,2, wherein,
when Tk is less than Ti, the judging module corrects the rotating speed of the fan to Vaj ', Vaj' is set to Vaj xb, b is set as a correction coefficient, and 1 < b < 1.2;
when Tk is not less than Ti, no correction is performed.
Compared with the prior art, the method has the advantages that when the calibration module calibrates the acquired winding temperature, the calibration module compares the real-time winding temperature T with each preset value, when the real-time winding temperature T is smaller than the preset values, the winding temperature is proved to be in a normal range, when the winding temperature T is between the preset values, the temperature is proved to be too high, the fan needs to be controlled to cool the winding, at the moment, the winding temperature T needs to be calibrated to accurately control the winding temperature, when the winding temperature T is larger than the preset values, the temperature is proved to be too high, tripping is needed to be carried out to protect, the temperature state of the dry-type transformer can be accurately reflected by comparing the real-time winding temperature T with each preset value, and the dry-type transformer can be effectively prevented from being damaged by controlling the working state, so that the service life of the dry-type transformer is prolonged; when the checking module checks the winding temperature T, the current detection result can be effectively checked through historical temperature data by setting a checking time period so as to prevent the temperature control deviation caused by fake detection data, and the temperature change curve can be effectively fed back to be in an ascending state or a descending state by setting the temperature change curve, so that different ways are adopted for coping so as to further accurately control the temperature change of the dry-type transformer, the time node can be set according to the winding temperature change speed when the temperature change curve is set so as to draw the temperature change curve, so that the temperature change trend is accurately reflected, when the checking is carried out, the winding temperature T is compared with the average temperature delta T for checking, and the winding temperature is corrected according to the trend of the temperature change curve, so that the corrected temperature is more accurate, and the influence of the measurement error on the temperature control is avoided, therefore, the accuracy of temperature control is improved, when T <. DELTA.T, the current temperature is proved to be falling, when T >. DELTA.T, the current temperature is proved to be rising, whether the current detected temperature is normal or not can be further determined according to the trend of the temperature change curve, and if the current detected temperature is abnormal, the accuracy of temperature control is improved through correction.
Particularly, when the winding temperature detected when the temperature is constant in the verification time period is corrected, the temperature variation is compared with a preset value so as to further correct the temperature, so that the corrected temperature is more accurate, if the temperature variation is larger than the preset value, the temperature detected at the moment is proved to have an error, and the temperature is corrected, so that the temperature control accuracy of the dry-type transformer can be further improved, and the service life of the dry-type transformer is prolonged.
Particularly, after the winding temperature is checked, the judging module controls the rotation speed change of the fan according to the corrected winding temperature so that the rotation speed of the fan is increased along with the increase of the temperature to reduce the temperature to a normal range, and meanwhile, the judging module judges the safety state of the dry-type transformer according to the corrected winding temperature and gives corresponding alarm through the alarm module so as to improve the safety degree of the dry-type transformer in use.
In particular, the invention is also provided with a fan rotating speed control formula, so that the fan is cooled at different rotating speeds under different temperature states, the temperature of the winding is ensured to be rapidly reduced to a safe interval, and the service life of the dry-type transformer is prolonged.
Particularly, after the rotating speed of the fan is determined, the judging module further adjusts the rotating speed of the fan according to the slope K of the temperature change curve, so that the adjusted rotating speed of the fan meets the cooling requirement, when K is smaller than 0, the temperature in the verification time period is proved to be in a descending state, the smaller the slope K is, the faster the temperature is reduced, when K is smaller than a preset value, the rotating speed of the fan can be properly reduced through an adjusting coefficient, so that the temperature reaches a normal range, when K is larger than 0, the temperature in the verification time period is proved to be in an ascending state, the larger the slope K is, the faster the temperature is increased, when K is larger than the preset value, the rotating speed of the fan can be properly increased through the adjusting coefficient, so that the temperature ascending speed is weakened, and the temperature reaches the normal range through cooling, so that the accurate control of the winding temperature is realized, and the service life of the dry-type transformer is prolonged.
Especially, after the fan rotating speed is adjusted, the corrected winding temperature is compared with the indoor temperature so as to further correct the fan rotating speed, when the winding temperature is higher than the indoor temperature, the cooling speed of the winding is increased by increasing the fan rotating speed so as to rapidly reduce the winding temperature to a safe interval, and the fan rotating speed is corrected according to the indoor temperature, so that the cooling efficiency of the winding can be further improved, the accuracy of temperature control is improved, and the service life of the dry-type transformer is prolonged.
Drawings
Fig. 1 is a schematic structural diagram of a temperature control system based on a dry-type transformer according to the present embodiment.
Detailed Description
In order that the objects and advantages of the invention will be more clearly understood, the invention is further described below with reference to examples; it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and do not limit the scope of the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Referring to fig. 1, a schematic structural diagram of a temperature control system based on a dry-type transformer according to the present embodiment is shown, the system includes,
the acquisition module is used for acquiring historical temperature data and real-time temperature data of a winding of the dry-type transformer and is connected with the processing module;
the checking module is used for checking the real-time temperature data according to the historical temperature data and generating a checking result, and is connected with the judging module;
the judging module is used for judging the safety of the dry-type transformer according to the checking result and generating a judging result, and is connected with the alarm module;
and the alarm module is used for alarming according to the judgment result.
Specifically, in the embodiment, when controlling the temperature of the dry-type transformer, the calibration module first obtains the real-time winding temperature T, compares the real-time winding temperature T with each preset temperature, and determines whether to calibrate according to the comparison result, wherein,
when T is less than T01, the checking module judges that the winding temperature is normal and does not need checking;
when T is more than or equal to T01 and is less than T02, the checking module judges that the winding temperature is high, starts the fan to cool, and checks the real-time winding temperature T;
when T is larger than or equal to T02, the checking module judges that the temperature is too high and controls the switch to trip without checking;
wherein, T01 is the first preset winding temperature, T02 is the second preset winding temperature, and T01 is less than T02.
Specifically, in the embodiment, when the calibration module calibrates the acquired winding temperature, the calibration module compares the real-time winding temperature T with each preset value, and when the winding temperature T is smaller than the preset value, it is verified that the winding temperature is in a normal range, and when the winding temperature T is between the preset values, it is verified that the temperature is too high, and the fan needs to be controlled to cool the winding, at this time, the winding temperature T needs to be calibrated to accurately control the winding temperature, and when the winding temperature T is greater than the preset value, it is verified that the temperature is too high, and the fan needs to trip for protection.
Specifically, when the verification module verifies the winding temperature T, the verification module is provided with a verification time period, the verification time period is T0 time before a verification time node, T0 is a preset value, and the unit of T0 is minutes, the verification module obtains a temperature change curve in the verification time period, the temperature change curve is drawn according to the temperature of each time node in the verification time period, and obtains the average temperature Δ T of the winding in the verification time period, the verification module compares the winding temperature T with the average temperature Δ T, and verifies according to the comparison result, wherein,
when T is less than delta T, if the temperature change curve is in a descending trend, the checking module judges that the winding temperature is normal; if the temperature change curve is in a rising trend, the checking module judges that the winding temperature is abnormal, corrects the winding temperature T to be T1, sets T1 to be 0.5 x (delta T + Tmax), and the Tmax is the maximum temperature value in the temperature change curve; if the temperature is unchanged in the verification time period, the verification module conducts verification according to the temperature variation Ta and sets Ta to be | T-Delta T |;
when T is equal to delta T, the checking module judges that the winding temperature is normal;
when T is larger than delta T, if the temperature change curve is in an ascending trend, the calibration module judges that the winding temperature is normal; if the temperature change curve is in a descending trend, the checking module judges that the winding temperature is abnormal, corrects the winding temperature T to be T2, sets T2 to be 0.5 x (delta T + Tmin), and Tmin is the minimum temperature value in the temperature change curve; and if the temperature is not changed in the verification time period, the verification module performs verification according to the temperature variation Ta.
Specifically, in the embodiment, when the verification module verifies the winding temperature T, the current detection result can be effectively verified through historical temperature data by setting a verification time period so as to prevent the temperature control from deviating due to counterfeit detection data, and the embodiment can effectively feed back that the temperature is in an increasing state or a decreasing state by setting a temperature change curve so as to take different measures to further accurately control the temperature change of the dry-type transformer, and when the embodiment sets the temperature change curve, a time node can be set according to the winding temperature change speed so as to draw the temperature change curve so as to accurately reflect the temperature change trend, and when the verification is performed, the winding temperature T is compared with the average temperature Δ T for verification, and the winding temperature is corrected according to the trend of the temperature change curve so as to make the corrected temperature more accurate, the influence of measurement error on temperature control is avoided, and therefore the accuracy of temperature control is improved.
Specifically, when the temperature does not change within the verification time period, the verification module compares the calculated temperature variation Ta with a preset temperature variation Ta0, and verifies the winding temperature T according to the comparison result, wherein,
when Ta is less than or equal to Ta0, the checking module judges that the winding temperature is normal;
when Ta is greater than Ta0, the verification module judges that the winding temperature is abnormal, corrects the winding temperature T to T3, and sets T3 to delta T +/-Ta 0.
Specifically, when the winding temperature detected when the temperature is constant in the verification time period is corrected, the temperature variation is compared with a preset value to further correct the temperature, so that the corrected temperature is more accurate, if the temperature variation is larger than the preset value, the temperature detected at the moment is proved to have an error, and the temperature is corrected, so that the temperature control accuracy of the dry-type transformer can be further improved, and the service life of the dry-type transformer is prolonged.
Specifically, after the verification module completes verification of the winding temperature T, the judgment module compares the corrected winding temperature Ti with each preset correction temperature, sets i to 1,2, and 3, and performs safety judgment on the dry-type transformer according to the comparison result, wherein,
when the T01 is not less than Ti and is less than T11, the judging module judges that the dry-type transformer has low risk and adjusts the rotating speed of the fan to V1;
when the T11 is not less than Ti and is less than T12, the judging module judges that the dry-type transformer has medium risk and adjusts the rotating speed of the fan to V2;
when the T12 is not less than the value that Ti is less than T02, the judgment module judges that the dry-type transformer has high risk and adjusts the rotating speed of the fan to be V3;
wherein T11 is a first preset correction temperature, T12 is a second preset correction temperature, and T11 is more than T12; v1 is the first preset fan speed, V2 is the second preset fan speed, V3 is the third preset fan speed, V1 < V2 < V3.
Specifically, in this embodiment, after the winding temperature is verified, the determining module controls the change of the rotation speed of the fan according to the corrected winding temperature, so that the rotation speed of the fan increases with the increase of the temperature, so that the temperature is reduced to a normal range, and meanwhile, the determining module further determines the safety state of the dry-type transformer according to the corrected winding temperature, and performs corresponding alarm through the alarm module, so as to improve the safety of the dry-type transformer.
Specifically, the judging module is further provided with a fan rotation speed relational expression, wherein V1 is a preset value, and is set,
V2＝V1+V1×(Ti-T11)/Ti，
V3＝V2+V2×(Ti-T12)/T12，
when V3 is larger than or equal to Vmax, the Vmax is taken as the rotating speed of the fan, and the Vmax is the maximum rotating speed of the fan.
Specifically, still be equipped with fan rotational speed control formula in this embodiment to make under the different temperature state fan cool down with different rotational speeds, in order to guarantee that the temperature of winding reduces to the safety interval fast, thereby improves dry-type transformer's life.
Specifically, after the fan rotation speed is set by the judgment module, the judgment module obtains the slope K of the temperature change curve, compares the slope K of the temperature change curve with each preset slope, adjusts the fan rotation speed Vi according to the comparison result, and sets i to 1,2, and 3, wherein,
when K is less than 0, the judging module compares the slope K of the temperature change curve with a first preset slope K1, and when K is less than K1, the judging module adjusts the fan rotating speed Vi to Va1, sets Va1 to Vi multiplied by a1, sets a1 to be a first adjusting coefficient, and sets a1 to be less than 1 and is more than 0.9; when K is more than or equal to K1, no adjustment is carried out;
when K is 0, no adjustment is performed;
when K is greater than 0, the judging module compares the slope K of the temperature change curve with a second preset slope K2, and when K is greater than K2, the judging module adjusts the fan rotating speed Vi to Va2, sets Va2 to Vi multiplied by a2, sets a2 to be a second adjusting coefficient, and sets a value which is greater than 1 and less than a1 and less than 1.1; when K is less than or equal to K2, no adjustment is carried out;
wherein, K1 is a first preset slope, K2 is a second preset slope, and K1 is more than 0 and less than K2.
Specifically, in this embodiment, after the fan rotation speed is determined, the determining module further adjusts the fan rotation speed according to the slope K of the temperature change curve, so that the adjusted fan rotation speed meets the cooling requirement, when K is less than 0, the temperature is proved to be in a descending state in the verification time period, the smaller the slope K is, the faster the temperature is descended, when K is less than the preset value, the rotating speed of the fan can be properly reduced by adjusting the coefficient so as to enable the temperature to reach a normal range, when K is more than 0, the temperature in the verification time period is proved to be in a rising state, the larger the slope K is, the faster the temperature rises, when K is larger than the preset value, the rotating speed of the fan can be properly increased by adjusting the coefficient so as to weaken the temperature rising speed, and the temperature reaches the normal range through cooling, so that the accurate control of the winding temperature is realized, and the service life of the dry-type transformer is prolonged.
Specifically, after the fan rotation speed Vi is adjusted, the determining module obtains the indoor temperature Tk, compares the indoor temperature Tk with the corrected winding temperature Ti, and corrects the adjusted fan rotation speed Vaj according to the comparison result, and sets j to 1,2,
when Tk is less than Ti, the judging module corrects the rotating speed of the fan to Vaj ', Vaj' is set to Vaj xb, b is set as a correction coefficient, and 1 < b < 1.2;
when Tk is not less than Ti, no correction is performed.
Particularly, in this embodiment after accomplishing fan speed control, through comparing winding temperature after will rectifying with indoor temperature to further revise fan speed, when winding temperature is greater than indoor temperature, then accelerate the cooling rate to the winding through improving fan speed, with reduce winding temperature to safety interval fast, revise fan speed according to indoor temperature, can further improve the cooling efficiency to the winding, thereby improve the accuracy to temperature control, in order to improve dry-type transformer's life.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (6)
1. A temperature control system based on a dry type transformer is characterized by comprising,
the acquisition module is used for acquiring historical temperature data and real-time temperature data of a winding of the dry-type transformer and is connected with the processing module;
the checking module is used for checking the real-time temperature data according to the historical temperature data and generating a checking result, and is connected with the judging module;
the judging module is used for judging the safety of the dry-type transformer according to the checking result and generating a judging result, and is connected with the alarm module;
the alarm module is used for alarming according to the judgment result;
when the temperature of the dry-type transformer is controlled, the calibration module compares the winding temperature T acquired in real time with a preset value to judge whether calibration is carried out or not, when the calibration is needed, the calibration module calibrates the winding temperature T according to the average temperature Delta T of the winding in a calibration time period, after the calibration is finished, the judgment module carries out safety judgment on the dry-type transformer according to the corrected winding temperature Ti, i =1,2 and 3 are set, the fan is controlled to cool, after the setting of the rotating speed of the fan is finished, the judgment module adjusts the rotating speed of the fan according to the slope K of a temperature change curve in the calibration time period, and after the adjustment is finished, the judgment module corrects the adjusted rotating speed of the fan according to the indoor temperature Tk;
when the verification module verifies the winding temperature T, the verification module is provided with a verification time period, the verification time period is T0 time before a verification time node, T0 is a preset value, the unit of T0 is minutes, the verification module obtains a temperature change curve in the verification time period, the temperature change curve is drawn according to the temperature of each time node in the verification time period, the average temperature delta T of the winding in the verification time period is obtained, the verification module compares the winding temperature T with the average temperature delta T, and verification is carried out according to the comparison result;
when T is less than delta T, if the temperature change curve is in a descending trend, the checking module judges that the winding temperature is normally acquired; if the temperature change curve is in a rising trend, the checking module judges that the winding temperature is abnormal, corrects the winding temperature T to be T1, sets T1=0.5 x (delta T + Tmax), and the Tmax is the maximum temperature value in the temperature change curve; if the temperature is unchanged in the verification time period, the verification module conducts verification according to the temperature variation Ta and sets Ta = | T-Delta T |; when T =ΔT, the checking module judges that the winding temperature is normal;
when T is greater than delta T, if the temperature change curve is in an ascending trend, the checking module judges that the winding temperature is normal; if the temperature change curve is in a descending trend, the checking module judges that the winding temperature is abnormal, corrects the winding temperature T to be T2, sets T2=0.5 x ([ delta ] T + Tmin), and Tmin is the minimum temperature value in the temperature change curve; if the temperature does not change in the verification time period, the verification module conducts verification according to the temperature variation Ta;
when the temperature does not change in the verification time period, the verification module compares the calculated temperature variation Ta with a preset temperature variation Ta0 and verifies the winding temperature T according to the comparison result, wherein,
when Ta is less than or equal to Ta0, the checking module judges that the winding temperature is normal;
when Ta is greater than Ta0, the verification module judges that the winding temperature is abnormal, corrects the winding temperature T to T3, and sets T3= [ Delta ] T +/-Ta 0.
2. The dry type transformer-based temperature control system according to claim 1, wherein, in the verification of the winding temperature, the verification module first obtains a real-time winding temperature T, compares the real-time winding temperature T with each preset temperature, and judges whether to perform the verification according to the comparison result, wherein,
when T is less than T01, the checking module judges that the winding temperature is normal and does not need checking;
when T is more than or equal to T01 and is less than T02, the checking module judges that the winding temperature is high, starts the fan to cool, and checks the real-time winding temperature T;
when T is larger than or equal to T02, the checking module judges that the temperature is too high and controls the switch to trip without checking;
wherein, T01 is the first preset winding temperature, T02 is the second preset winding temperature, and T01 is less than T02.
3. The dry type transformer-based temperature control system according to claim 1, wherein the checking module compares the corrected winding temperature Ti with preset correction temperatures after the winding temperature T is checked, sets i =1,2,3, and performs a safety judgment on the dry type transformer according to the comparison result, wherein,
when the T01 is not less than Ti and is less than T11, the judging module judges that the dry-type transformer has low risk and adjusts the rotating speed of the fan to V1;
when the T11 is not less than Ti and is less than T12, the judging module judges that the dry-type transformer has medium risk and adjusts the rotating speed of the fan to V2;
when the T12 is not less than Ti and is less than T02, the judging module judges that the dry-type transformer has high risk and adjusts the rotating speed of the fan to V3;
wherein T11 is a first preset correction temperature, T12 is a second preset correction temperature, and T11 is more than T12; v1 is the first preset fan speed, V2 is the second preset fan speed, V3 is the third preset fan speed, V1 < V2 < V3.
4. The dry-type transformer-based temperature control system according to claim 3, wherein the determining module further comprises a fan speed relation, wherein V1 is a preset value, and is set,
V2=V1+V1×（Ti-T11）/Ti，
V3=V2+V2×（Ti-T12）/T12，
when V3 is larger than or equal to Vmax, the Vmax is taken as the rotating speed of the fan, and the Vmax is the maximum rotating speed of the fan.
5. The dry-type transformer-based temperature control system according to claim 4, wherein the judging module obtains a slope K of the temperature change curve after the blower rotation speed setting is completed, compares the slope K of the temperature change curve with each preset slope, and adjusts the blower rotation speed Vi according to the comparison result, wherein i =1,2,3 is set,
when K is less than 0, the judging module compares the slope K of the temperature change curve with a first preset slope K1, and when K is less than K1, the judging module adjusts the fan rotating speed Vi to Va1, sets Va1= Vi × a1, sets a1 as a first adjusting coefficient, and sets a1 less than 1 and 0.9; when K is more than or equal to K1, no adjustment is carried out;
when K =0, no adjustment is made;
when K is larger than 0, the judging module compares the slope K of the temperature change curve with a second preset slope K2, and when K is larger than K2, the judging module adjusts the fan rotating speed Vi to Va2, sets Va2= Vi × a2, sets a2 as a second adjusting coefficient, and sets a value which is larger than 1 and smaller than a1 and smaller than 1.1; when K is less than or equal to K2, no adjustment is carried out;
wherein, K1 is a first preset slope, K2 is a second preset slope, and K1 is more than 0 and less than K2.
6. The temperature control system based on the dry type transformer as claimed in claim 5, wherein the judging module obtains the indoor temperature Tk after the fan rotation speed Vi is adjusted, compares the indoor temperature Tk with the corrected winding temperature Ti, and corrects the adjusted fan rotation speed Vaj according to the comparison result, wherein j =1,2 is set,
when Tk is less than Ti, the judging module corrects the rotating speed of the fan to Vaj ', Vaj' = Vaj xb is set, b is a correction coefficient, and 1 < b < 1.2;
when Tk is not less than Ti, no correction is performed.
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