CN113325906B - Humidity control method, system, equipment and medium for electrical components of wind turbine generator - Google Patents

Humidity control method, system, equipment and medium for electrical components of wind turbine generator Download PDF

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Publication number
CN113325906B
CN113325906B CN202110649789.3A CN202110649789A CN113325906B CN 113325906 B CN113325906 B CN 113325906B CN 202110649789 A CN202110649789 A CN 202110649789A CN 113325906 B CN113325906 B CN 113325906B
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value
humidity
electrical component
water vapor
preset time
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CN113325906A (en
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王张良
赵云琨
曹朝菲
倪黎
寻征轩
俞庆
张鲁华
葛昊祥
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Shanghai Electric Wind Power Group Co Ltd
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Shanghai Electric Wind Power Group Co Ltd
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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D27/00—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00
    • G05D27/02—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00 characterised by the use of electric means

Abstract

The invention discloses a humidity control method, a system, equipment and a medium for electrical components of a wind turbine generator, wherein the humidity control method comprises the following steps: obtaining a humidity predicted value of the electrical component at a future preset moment according to the acquired historical humidity value of the electrical component; and controlling the electrical component according to the humidity predicted value at the future preset moment so that the actual humidity value of the electrical component at the future preset moment meets the preset condition. According to the method, the humidity predicted value of the electrical component at the future preset time is obtained according to the acquired historical humidity value of the electrical component, and then the electrical component is controlled according to the humidity predicted value at the future preset time, so that the actual humidity value of the electrical component at the future preset time meets the preset condition, the humidity value of the electrical component at the future preset time is predicted, the control over the electrical component is realized based on the humidity predicted value at the future preset time, the maintenance of the wind turbine generator is facilitated, and the control requirement on the humidity of the electrical component of the wind turbine generator is met.

Description

Humidity control method, system, equipment and medium for electrical components of wind turbine generator
Technical Field
The invention relates to the technical field of wind power generation, in particular to a humidity control method, a humidity control system, humidity control equipment and humidity control media for electrical components of a wind turbine generator.
Background
The electrical component is a core component of the wind turbine generator, generally, the electrical component of the offshore wind turbine generator is sensitive to humidity, and during the transportation, storage, hoisting and the like of the wind turbine generator, the situation that external power supply does not exist or external power supply is difficult (hereinafter referred to as "power off") exists for a long time, and the electrical component in the wind turbine generator needs to be dehumidified during the power off period.
In the prior art, generally, a drying agent is used for dehumidifying electrical components of a wind turbine generator in the processes of transportation, storage, hoisting and the like, but humidity information of the electrical components and the moisture absorption state of a drying agent dehumidifying device cannot be detected and predicted, so that the dehumidification of the electrical components is in a 'black box' state, and therefore, the reliability is low and the controllability is poor.
Disclosure of Invention
The invention aims to overcome the defects that the future humidity of an electrical component cannot be predicted and the electrical component is controlled based on a humidity prediction value in the prior art, and provides a humidity control method, a humidity control system, humidity control equipment and a humidity control medium for the electrical component of a wind turbine generator.
The invention solves the technical problems through the following technical scheme:
the invention provides a humidity control method for electrical components of a wind turbine generator, which comprises the following steps:
acquiring a historical humidity value of the electrical component;
obtaining a humidity predicted value of the electrical component at a future preset moment according to the historical humidity value;
and controlling the electrical component according to the humidity predicted value at the future preset moment so that the actual humidity value of the electrical component at the future preset moment meets a preset condition.
Preferably, the electrical component is provided with a passive humidity control device, and the step of controlling the electrical component according to the predicted humidity value at the future preset time includes:
if the predicted humidity value at the future preset time is greater than the humidity demand threshold, first early warning information is sent out, and the first early warning information is used for reminding a passive humidity control device of the electrical component to be replaced before the future preset time, so that the actual humidity value at the future preset time is not greater than the humidity demand threshold.
Preferably, the step of controlling the electrical component according to the humidity prediction value at the future preset time further comprises:
and if the difference value of the historical humidity values between two same electrical components exceeds a preset threshold value or the difference value of the humidity predicted values at the future preset moment exceeds a preset threshold value, sending second early warning information, wherein the second early warning information is used for reminding the inspection and improving the sealing performance of the electrical components with larger humidity predicted values so as to enable the difference value to be smaller than the preset threshold value.
Preferably, the humidity control method further comprises:
acquiring a historical temperature value of the electrical component;
obtaining a predicted temperature value of the electrical component at the future preset moment according to the historical temperature value;
obtaining a predicted humidity value of the electrical component at a future preset time according to the historical humidity value specifically comprises:
and obtaining the humidity predicted value of the electrical component at the future preset time according to the historical humidity value and the temperature predicted value at the future preset time.
Preferably, the humidity control method further comprises:
acquiring an original weight value and a current weight value of the passive humidity adjusting device;
obtaining a weight value of the water vapor absorbed by the passive humidity control device according to the original weight value and the current weight value;
obtaining a total water vapor weight value entering the interior of the electrical component from the outside in unit time according to the initial water vapor weight value in the air in the interior of the electrical component, the current water vapor weight value in the air in the interior of the electrical component and the water vapor weight value absorbed by the passive humidity control device;
obtaining a predicted value of the weight of the water vapor absorbed by the passive humidity control device at the future preset time according to the total weight value of the water vapor;
the step of obtaining the predicted humidity value of the electrical component at the future preset time according to the historical humidity value specifically comprises the following steps:
and obtaining the humidity predicted value of the electrical component at the future preset time according to the humidity demand target value, the predicted value of the weight of the absorbed water vapor at the future preset time, the saturated water vapor content value of the unit volume of the electrical component at the future preset time and the predicted value of the temperature at the future preset time.
Preferably, the calculation formula for obtaining the weight value of the total water vapor entering the electric component from the outside per unit time is as follows:
WT_unit＝(G1+G2-G3)/time_step*i
wherein, WT _ unit is the total weight value of water vapor entering the electric component from the outside in unit time; g1 is the current weight value of water vapor in the air inside the electrical component; g2 is the weight value of the water vapor absorbed by the passive humidity control device; g3 is the initial water vapor weight value in the air inside the electrical component; time _ step is the sampling period; i is the sampling frequency;
the calculation formula for obtaining the predicted value of the weight of the water vapor absorbed by the passive humidity control device at the future preset time is as follows:
Dehu_pred＝WT_unit*time_step*i+G3-G4
the Dehu _ pred is a predicted value of the weight of the water vapor absorbed by the passive humidity control device at a preset time in the future; g4 is the weight value of the water vapor in the air inside the electric component at the future preset moment;
the calculation formula for obtaining the saturated water vapor content value of the electric component in unit volume at the future preset time is as follows:
A＝(WT_unit*time_step*i+G3-Dehu_max)/V_cambinet
wherein A is a saturated water vapor content value of the electrical component in unit volume at a future preset time; dehu _ max is the maximum weight value of the passive humidity control device capable of absorbing water vapor; v _ Cambodiet is the effective volume of the electrical component.
Preferably, the obtaining the predicted value of the humidity of the electrical component at the future preset time according to the humidity demand target value, the predicted value of the weight of the water vapor absorbed at the future preset time, the saturated water vapor content value of the electrical component at the unit volume at the future preset time, and the predicted value of the temperature at the future preset time specifically includes:
when the predicted value of the weight of the water vapor absorbed at the future preset time is less than or equal to the maximum weight value of the water vapor which can be absorbed by the passive humidity control device, the predicted value of the humidity of the electrical component at the future preset time is equal to the humidity demand target value;
and when the predicted value of the weight of the water vapor absorbed at the future preset time is greater than the maximum weight value of the water vapor absorbed by the passive humidity control device, obtaining the predicted value of the humidity of the electrical component at the future preset time by adopting a table look-up method including but not limited to the table look-up method according to the saturated water vapor content value of the unit volume of the electrical component at the future preset time and the predicted value of the temperature at the future preset time.
Preferably, the acquiring the historical humidity value of the electrical component specifically includes:
periodically collecting historical humidity values of the electrical components, and collecting and averaging the historical humidity values in each period for multiple times to obtain an average value as the historical humidity value in the period;
and/or the presence of a gas in the gas,
the acquiring the historical temperature value of the electrical component specifically includes:
the method comprises the steps of periodically collecting historical temperature values of the electrical components, and collecting and averaging for multiple times in each period to serve as the historical temperature values in the period;
and/or the presence of a gas in the gas,
the acquiring of the current weight value of the passive humidity control device specifically comprises:
the current weight value of the passive humidity adjusting device is periodically acquired, and the current weight value in each period is acquired and averaged for use as the current weight value in the period.
The invention provides a humidity control system of an electrical component of a wind turbine generator, which comprises a first acquisition module, a first calculation module and a control module;
the first acquisition module is used for acquiring a historical humidity value of the electrical component;
the first calculation module is used for obtaining a humidity predicted value of the electrical component at a future preset moment according to the historical humidity value;
the control module is used for controlling the electrical component according to the humidity predicted value at the future preset moment so that the actual humidity value of the electrical component at the future preset moment meets a preset condition.
Preferably, a passive humidity control device is arranged in the electrical component, the control module is specifically configured to send out first warning information if the predicted humidity value at the future preset time is greater than a humidity demand threshold, and the first warning information is used to remind the passive humidity control device of the electrical component to be replaced before the future preset time, so that the actual humidity value at the future preset time is not greater than the humidity demand threshold.
Preferably, the control module is further specifically configured to send out second warning information if a difference between the historical humidity values of two identical electrical components exceeds a preset threshold or a difference between the humidity predicted values at the future preset time exceeds a preset threshold, where the second warning information is used to prompt an inspection and improve the sealing performance of the electrical component with a larger humidity predicted value, so that the difference is smaller than the preset threshold.
Preferably, the humidity control system further comprises a second obtaining module and a second calculating module;
the second acquisition module is used for acquiring a historical temperature value of the electrical component;
the second calculation module is used for obtaining a predicted temperature value of the electrical component at the future preset time according to the historical temperature value;
the first calculation module is specifically configured to obtain a predicted humidity value of the electrical component at the future preset time according to the historical humidity value and the predicted temperature value at the future preset time.
Preferably, the humidity control system further comprises a third obtaining module, a third calculating module, a fourth calculating module and a fifth calculating module;
the third obtaining module is used for obtaining an original weight value and a current weight value of the passive humidity adjusting device;
the third calculation module is used for obtaining a weight value of the water vapor absorbed by the passive humidity control device according to the original weight value and the current weight value;
the fourth calculation module is used for obtaining a total water vapor weight value entering the interior of the electrical component from the outside in unit time according to the initial water vapor weight value in the air inside the electrical component, the current water vapor weight value in the air inside the electrical component and the water vapor weight value absorbed by the passive humidity control device;
the fifth calculation module is used for obtaining a predicted value of the weight of the water vapor absorbed by the passive humidity control device at the future preset time according to the total weight value of the water vapor;
the first calculation module is specifically configured to obtain a predicted humidity value of the electrical component at the future preset time according to the humidity demand target value, the predicted weight of the absorbed water vapor at the future preset time, the saturated water vapor content value of the electrical component at the unit volume at the future preset time, and the predicted temperature value at the future preset time.
Preferably, the calculation formula for obtaining the weight value of the total water vapor entering the electric component from the outside per unit time is as follows:
WT_unit＝(G1+G2-G3)/time_step*i
wherein, WT _ unit is the total weight value of water vapor entering the electric component from the outside in unit time; g1 is the current weight value of water vapor in the air inside the electrical component; g2 is the weight value of the water vapor absorbed by the passive humidity control device; g3 is the initial water vapor weight value in the air inside the electrical component; time _ step is the sampling period; i is the sampling frequency;
the calculation formula for obtaining the predicted value of the weight of the water vapor absorbed by the passive humidity control device at the future preset time is as follows:
Dehu_pred＝WT_unit*time_step*i+G3-G4
the Dehu _ pred is a predicted value of the weight of the water vapor absorbed by the passive humidity control device at a preset time in the future; g4 is the weight value of the water vapor in the air inside the electric component at the future preset moment;
the calculation formula for obtaining the saturated water vapor content value of the electric component in unit volume at the future preset time is as follows:
A＝(WT_unit*time_step*i+G3-Dehu_max)/V_cambinet
wherein A is a saturated water vapor content value of the electrical component in unit volume at a future preset time; dehu _ max is the maximum weight value of the passive humidity control device capable of absorbing water vapor; v _ Cambodiet is the effective volume of the electrical component.
Preferably, the first calculation module is specifically configured to, when the predicted value of the weight of the water vapor absorbed at the future preset time is less than or equal to the maximum weight value of the water vapor that can be absorbed by the passive humidity control device, make the predicted value of the humidity of the electrical component at the future preset time equal to the humidity demand target value;
the first calculating module is further specifically configured to, when the predicted value of the weight of the water vapor absorbed at the future preset time is greater than the maximum weight value of the water vapor that can be absorbed by the passive humidity control apparatus, obtain the predicted value of the humidity of the electrical component at the future preset time by using a table look-up method including but not limited to a table look-up method according to the saturated water vapor content value of the unit volume of the electrical component at the future preset time and the predicted value of the temperature at the future preset time.
Preferably, the first obtaining module is specifically configured to periodically collect historical humidity values of the electrical component, and collect and average multiple times in each period as the historical humidity value in the period;
and/or the presence of a gas in the gas,
the second acquisition module is specifically used for periodically acquiring historical temperature values of the electrical component, and acquiring and averaging the historical temperature values for multiple times in each period to obtain an average value as the historical temperature value in the period;
and/or the presence of a gas in the gas,
the third obtaining module is specifically configured to periodically collect the current weight value of the passive humidity control device, and collect multiple times in each period and take an average value as the current weight value in the period.
A third aspect of the present invention provides an electronic device, which includes a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein the processor implements the humidity control method for the electrical component of the wind turbine generator set according to the first aspect when executing the computer program.
A fourth aspect of the present invention provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the method for humidity control of an electrical component of a wind turbine generator as set forth in the first aspect.
The positive progress effects of the invention are as follows:
according to the method, the humidity predicted value of the electrical component at the future preset time is obtained according to the acquired historical humidity value of the electrical component, and then the electrical component is controlled according to the humidity predicted value at the future preset time, so that the actual humidity value of the electrical component at the future preset time meets the preset condition, the humidity value of the electrical component at the future preset time is predicted, the control over the electrical component is realized based on the humidity predicted value at the future preset time, the maintenance of the wind turbine generator is facilitated, and the control requirement on the humidity of the electrical component of the wind turbine generator is met.
Drawings
Fig. 1 is a flowchart of a humidity control method for an electrical component of a wind turbine generator according to embodiment 1 of the present invention.
Fig. 2 is a first flowchart of obtaining a predicted humidity value at a future preset time in a humidity control method for an electrical component of a wind turbine generator according to embodiment 1 of the present invention.
Fig. 3 is a second flowchart of obtaining a predicted humidity value at a future preset time in the humidity control method for the electrical component of the wind turbine generator according to embodiment 1 of the present invention.
Fig. 4 is a schematic block diagram of a humidity control system for electrical components of a wind turbine generator according to embodiment 2 of the present invention.
Fig. 5 is a schematic block diagram of a humidity control system for electrical components of a wind turbine generator according to embodiment 3 of the present invention.
Fig. 6 is a schematic structural diagram of an electronic device for implementing a humidity control method for electrical components of a wind turbine generator according to embodiment 4 of the present invention.
Detailed Description
The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.
Example 1
As shown in fig. 1, the humidity control method for electrical components of a wind turbine generator according to the present embodiment includes:
step 101, obtaining a historical humidity value of the electrical component.
Specifically, historical humidity values of the electrical component are periodically collected, and are collected and averaged multiple times in each cycle as the historical humidity values in the cycle. In the present embodiment, a historical relative humidity value of the electrical component is generally acquired.
In the embodiment, historical humidity values of the electrical component are periodically acquired through a temperature and humidity sensor in the electrical component, the sampling period is time _ step, and i times of data are acquired during each sampling; generally, the sampling period time _ step is more than or equal to 1 hour, the collection frequency i is more than or equal to 3 each time, and the average value of the i times is taken as the effective value of the current sampling. The time of the sampling period and the number of times of sampling are set according to actual conditions, and are not particularly limited herein.
And 102, obtaining a humidity predicted value of the electrical component at a future preset time according to the historical humidity value.
In this embodiment, the predicted value RH _ pred (N + K) of the relative humidity K cycles after the current N sampling cycles is obtained by fitting, including but not limited to least square, the obtained historical humidity value of the electrical component.
In this embodiment, the process of least squares fitting is as follows:
Figure BDA0003111285360000091
RH_pred(N+K)＝f(N+K,time_step,a,b)
wherein e isiDeviation of input parameter value; RH (relative humidity)iObtaining a historical humidity value of the electrical component for the ith sample; a. b are parameters determined by least square fitting of f (i, time _ step) respectively; and RH _ pred (N + K) is a predicted value of the relative humidity of K periods after the current N sampling periods.
And 103, controlling the electrical component according to the humidity predicted value at the future preset time so that the actual humidity value of the electrical component at the future preset time meets the preset condition.
In the embodiment, the passive humidity adjusting device is arranged in the electrical component, and the electrical component of the wind turbine generator set refers to all electrical components in the fan generator set; the electrical components include but are not limited to a generator, a master control electrical cabinet, a variable pitch electrical cabinet, a variable current electrical cabinet and the like, namely, passive humidity control devices are required to be arranged for all the electrical components in the fan unit, for example, the passive humidity control devices are respectively arranged for the generator, the master control electrical cabinet, the variable pitch electrical cabinet, the variable current electrical cabinet and the like, so as to ensure that the electrical components are not short-circuited, damaged in insulation or corroded. When the passive humidity control apparatus is placed inside the electrical component, the passive humidity control apparatus is preferentially placed in the vent hole or the heat dissipation window on the premise of uniform distribution.
In the present embodiment, an environmentally friendly, recyclable passive humidity control apparatus is used, and the passive humidity control apparatus includes, but is not limited to, a super absorbent polymer, a breathable material, a composite fiber material, and the like.
In the present embodiment, when the electrical component is controlled according to the predicted humidity value at the future preset time, the predicted maintenance advice and the warning are given, and the predicted maintenance advice and the warning include, but are not limited to, the recommended replacement cycle value of the passive humidity control device and the inspection opinion of the sealing performance of the electrical component.
Specifically, when the electrical component is controlled based on the predicted humidity value at the future preset time, the recommended replacement cycle value of the passive humidity control apparatus is given as follows:
if the predicted humidity value at the future preset moment is greater than the humidity demand threshold, first early warning information is sent out and used for reminding a passive humidity adjusting device of the electrical component to be replaced before the future preset moment, so that the actual humidity value at the future preset moment is not greater than the humidity demand threshold.
Preferably, in this embodiment, the controlling the electrical component according to the predicted humidity value at the future preset time specifically includes: and before the actual humidity value at the future preset moment is larger than the humidity demand threshold, replacing the passive humidity control device of the electrical component. The humidity requirement threshold, which is an upper limit of humidity that is unacceptable and potentially ineffective for electrical components, is preferably 60% in this embodiment.
In this embodiment, the passive humidity control apparatus may be replaced before the predicted value of the weight of the water vapor absorbed by the passive humidity control apparatus at the future preset time is equal to the saturated water vapor weight value of the passive humidity control apparatus.
In the present embodiment, when the electrical component is controlled based on the predicted humidity value at the future preset time, the observation of the sealability check of the electrical component is given as follows:
if the difference value of the historical humidity values at the same historical moment between two same electrical components exceeds a preset threshold value or the difference value of the humidity predicted values at the same future preset moment exceeds a preset threshold value, second early warning information is sent out and used for reminding checking and improving the sealing performance of the electrical components with larger humidity predicted values, so that the difference value is smaller than the preset threshold value.
Preferably, in this embodiment, the specifically controlling the electrical component according to the predicted value of humidity at the future preset time further includes: if the difference between the historical humidity values of any two identical electrical components at the same historical time exceeds a preset threshold or the difference between the humidity predicted values at the same future preset time exceeds a preset threshold, the sealing performance of the electrical component with a large humidity predicted value needs to be checked and improved.
In this embodiment, when the change tendencies of the historical humidity values of a plurality of electrical components of the same specification are different, the sealing performance of the electrical components other than the electrical component having the smallest rise in humidity value can be checked.
In this embodiment, in order to reduce external water vapor from entering the electrical component and improve humidity conditioning efficiency, a sealing assembly is generally used to seal the electrical component, where the sealing assembly includes, but is not limited to, a waterproof tape, a waterproof wrapping paper, a plastic film, and the like; for example, in the present embodiment, the ventilation holes, the heat dissipation windows, and the like of the electrical components are temporarily sealed with the waterproof tape to reduce the entry of external water vapor into the electrical components, thereby improving the humidity conditioning efficiency.
In an implementation manner, on the basis of obtaining the predicted humidity value of the electrical component at the preset time in the future based on the historical humidity value, in order to obtain the predicted humidity value of the electrical component at the preset time in the future more accurately, as shown in fig. 2, the humidity control method for the electrical component of the wind turbine further includes:
step 201, obtaining a historical temperature value of the electrical component.
Specifically, historical temperature values of the electrical component are periodically collected, and the historical temperature values in each period are collected and averaged multiple times.
In this embodiment, the historical humidity value and the historical temperature value of the electrical component are periodically and simultaneously acquired by the temperature and humidity sensor in the electrical component. Namely, the sampling period and the collection times for collecting the historical temperature value of the electrical component are the same as the sampling period and the collection times for collecting the historical temperature value of the electrical component.
In the embodiment, a mobile wireless device is adopted to receive and store historical relative humidity values and historical temperature values of the electric components acquired and uploaded by the temperature and humidity sensor;
RH＝RH(1,2…N)；Temp＝Temp(1,2…N)；
wherein RH is the historical relative humidity value of the obtained electric component; rh (N) is a relative humidity value of the electrical component newly acquired at the nth sampling period; temp is a historical temperature value of the sampled and obtained electrical component; temp (N) is the temperature value of the electrical component newly obtained in the nth sampling period.
And step 202, obtaining a predicted temperature value of the electrical component at a future preset time according to the historical temperature value.
In this embodiment, a least square fitting is adopted according to the acquired historical temperature value Temp of the electrical component, so as to obtain predicted temperature value Temp _ pred (N + K) of K periods after the current N sampling periods.
And step 203, obtaining a humidity predicted value of the electrical component at a future preset time (namely, the future preset time is K cycles after the current N sampling cycles) according to the historical humidity value and the temperature predicted value at the future preset time.
In this embodiment, a least square fitting is adopted according to the acquired historical relative humidity RH of the electrical component and the temperature predicted value Temp _ pred (N + K), so as to obtain the relative humidity predicted value RH _ pred (N + K) of K periods after the current N sampling periods.
In this embodiment, under a normal working condition, the relative humidity of the electrical component of the wind turbine generator that employs the passive humidity control device remains stable, that is, the humidity inside the electrical component is controlled to be below the humidity demand target value in an ideal working state of the passive humidity control device, where the humidity demand target value is smaller than the humidity demand threshold value.
When the moisture absorption rate of the passive humidity control device reaches an upper limit (usually, the upper limit is 30% of the self weight of the passive humidity control device, and may be set to other values), the passive humidity control device cannot absorb water vapor in the air, and at this time, since the external water vapor enters the inside of the electrical component, the temperature remains unchanged or the relative humidity tends to rise when the temperature rises, the predicted value of the humidity at the future preset time needs to be predicted only based on the historical humidity value or based on the historical humidity value and the predicted value of the temperature at the future preset time, so as to prevent the actual humidity value at the future preset time from being greater than the humidity demand threshold.
In an implementation manner, on the basis of obtaining the predicted humidity value of the electrical component at the future preset time based on the historical humidity value and the predicted temperature value at the future preset time, in order to more accurately obtain the predicted humidity value of the electrical component at the future preset time, as shown in fig. 3, the humidity control method for the electrical component of the wind turbine further includes:
and 301, acquiring an original weight value and a current weight value of the passive humidity adjusting device.
Specifically, the current weight value of the passive humidity control device is periodically acquired, and the current temperature value in each period is acquired and averaged for multiple times.
In this embodiment, the current weight value of the passive humidity control apparatus is periodically acquired by a weight sensor in the electrical component. The sampling period for acquiring the current weight value of the passive humidity control device is usually longer than the sampling period for acquiring the historical humidity value and the historical temperature value of the electrical component, for example, the sampling period for acquiring the historical humidity value and the historical temperature value of the electrical component may be one time acquired in 1 hour or one time acquired in several hours; the sampling period for acquiring the current weight value of the passive humidity adjusting device can be once every three days or once every week.
And 302, obtaining the weight value of the water vapor absorbed by the passive humidity control device according to the original weight value and the current weight value.
And step 303, obtaining a total weight value of the water vapor entering the electric component from the outside in unit time according to the initial weight value of the water vapor in the air inside the electric component, the current weight value of the water vapor in the air inside the electric component and the weight value of the water vapor absorbed by the passive humidity control device. In this embodiment, the saturated water vapor content value per unit volume under the initial condition is obtained by a table lookup method including but not limited to the initial temperature value and the initial humidity value.
And obtaining the saturated water vapor content value of unit volume under the ideal condition at the future preset moment by adopting a table look-up method without limitation according to the temperature predicted value and the humidity demand target value at the future preset moment.
The saturated water vapor content per unit volume under the current condition and the saturated water vapor content per unit volume under the initial condition are respectively multiplied by the electric component internal blank volume value, so as to respectively obtain a current water vapor weight value in the electric component internal air (namely, the water vapor weight value in the electric component internal air under the current condition), an initial water vapor weight value in the electric component internal air (namely, the water vapor weight value in the electric component internal air under the initial condition), and a water vapor weight value in the electric component internal air at a preset time in the future (namely, the water vapor weight value in the electric component internal air under an ideal condition at a preset time in the future).
In this embodiment, the calculation formula for obtaining the total weight value of the water vapor entering the electrical component from the outside in unit time is as follows:
WT_unit＝(G1+G2-G3)/time_step*i
wherein, WT _ unit is the total weight value of water vapor entering the electric component from the outside in unit time; g1 is the current weight value of water vapor in the air inside the electrical component; g2 is the weight value of the water vapor absorbed by the passive humidity control device; g3 is the initial water vapor weight value in the air inside the electrical component; time _ step is the sampling period; i is the number of samples.
And 304, obtaining a predicted value of the weight of the water vapor absorbed by the passive humidity control device at a preset time in the future according to the total weight value of the water vapor.
In this embodiment, the calculation formula for obtaining the predicted value of the weight of the water vapor absorbed by the passive humidity control device at the preset time in the future is as follows:
Dehu_pred＝WT_unit*time_step*i+G3-G4
the Dehu _ pred is a predicted value of the weight of the water vapor absorbed by the passive humidity control device at a preset time in the future; g4 is the water vapor weight value in the air inside the electrical component at the future preset time.
And 305, obtaining a humidity predicted value of the electrical component at the future preset time according to the humidity demand target value, the predicted value of the weight of the absorbed water vapor at the future preset time, the saturated water vapor content value of the unit volume of the electrical component at the future preset time and the predicted value of the temperature at the future preset time.
In this embodiment, the calculation formula for obtaining the saturated water vapor content value per unit volume of the electrical component at the future preset time is as follows:
A＝(WT_unit*time_step*i+G3-Dehu_max)/V_cambinet
wherein A is a saturated water vapor content value of the electrical component in unit volume at a future preset time; dehu _ max is the maximum weight value of the passive humidity control device capable of absorbing water vapor; v _ Cambodiet is the effective volume of the electrical component.
In this embodiment, step 305 specifically includes: when the predicted value of the weight of the water vapor absorbed by the passive humidity control device at the future preset time is less than or equal to the maximum weight value of the water vapor absorbed by the passive humidity control device, the predicted value of the humidity of the electrical component at the future preset time is equal to the humidity demand target value. The humidity demand target value is a humidity value of the electrical component that is expected to be achieved after the passive humidity control device is used.
When the predicted value of the weight of the water vapor absorbed by the passive humidity control device at the future preset time is larger than the maximum weight value of the water vapor absorbed by the passive humidity control device, the predicted value of the humidity of the electrical component at the future preset time is obtained by adopting a table look-up method including but not limited to the table look-up method according to the saturated water vapor content value of the unit volume of the electrical component at the future preset time and the predicted value of the temperature at the future preset time.
In this embodiment, the temperature and humidity sensor and the weight sensor are wireless sensors powered by lithium batteries.
The embodiment can also periodically collect the energy storage capacity and the service life of the lithium battery in the temperature and humidity sensor and the weight sensor so as to replace the lithium battery in time, thereby avoiding influencing the normal work of the temperature and humidity sensor and the weight sensor. It should be noted that the cycle of collecting the energy storage capacity and the service life of the lithium batteries in the temperature and humidity sensor and the weight sensor may be once a month or once in several months.
In this embodiment, the model selection calculation results of the passive humidity control device can be obtained according to the humidity requirement and the temperature requirement of the electrical component, the effective volume, the sealing performance, the maintenance frequency and the like, and the model selection calculation results include, but are not limited to, the number, the specification, the safety coefficient and the like; usually, the relative humidity requirement of the electrical component is less than or equal to 60 percent, the temperature requirement is less than or equal to 60 ℃, the effective volume is 30 to 70 percent, the protection level is not less than IP54, and the maintenance frequency is low when the wind turbine generator is not powered on, usually 1.5 times of the safety factor.
In the embodiment, the humidity predicted value of the electrical component at the future preset moment is obtained according to the acquired historical humidity value of the electrical component, and the electrical component is controlled according to the humidity predicted value at the future preset moment, so that the actual humidity value of the electrical component at the future preset moment meets the preset condition, the humidity value of the electrical component at the future preset moment is predicted, the control over the electrical component is realized based on the humidity predicted value at the future preset moment, the maintenance of the wind turbine generator is facilitated, and the control requirement on the humidity of the electrical component of the wind turbine generator is met.
Example 2
As shown in fig. 4, the humidity control system for electrical components of a wind turbine generator according to the present embodiment includes a first obtaining module 1, a first calculating module 2, and a control module 3.
The first obtaining module 1 is used for obtaining historical humidity values of the electrical components.
Specifically, historical humidity values of the electrical component are periodically collected, and are collected and averaged multiple times in each cycle as the historical humidity values in the cycle. In the present embodiment, a historical relative humidity value of the electrical component is generally acquired.
In the embodiment, historical humidity values of the electrical component are periodically acquired through a temperature and humidity sensor in the electrical component, the sampling period is time _ step, and i times of data are acquired during each sampling; generally, the sampling period time _ step is more than or equal to 1 hour, the collection frequency i is more than or equal to 3 each time, and the average value of the i times is taken as the effective value of the current sampling. The time of the sampling period and the number of times of sampling are set according to actual conditions, and are not particularly limited herein.
The first calculation module 2 is used for obtaining a humidity predicted value of the electrical component at a future preset time according to the historical humidity value.
In this embodiment, the predicted value RH _ pred (N + K) of the relative humidity K cycles after the current N sampling cycles is obtained by fitting, including but not limited to least square, the obtained historical humidity value of the electrical component.
In this embodiment, the process of least squares fitting is as follows:
Figure BDA0003111285360000151
RH_pred(N+K)＝f(N+K,time_step,a,b)
wherein e isiDeviation of input parameter value; RH (relative humidity)iObtaining a historical humidity value of the electrical component for the ith sample; a. b are parameters determined by least square fitting of f (i, time _ step) respectively; and RH _ pred (N + K) is a predicted value of the relative humidity of K periods after the current N sampling periods.
The control module 3 is used for controlling the electrical component according to the humidity predicted value at the future preset time, so that the actual humidity value of the electrical component at the future preset time meets the preset condition.
In the embodiment, the passive humidity adjusting device is arranged in the electrical component, and the electrical component of the wind turbine generator set refers to all electrical components in the fan generator set; the electrical components include but are not limited to a generator, a master control electrical cabinet, a variable pitch electrical cabinet, a variable current electrical cabinet and the like, namely, passive humidity control devices are required to be arranged for all the electrical components in the fan unit, for example, the passive humidity control devices are respectively arranged for the generator, the master control electrical cabinet, the variable pitch electrical cabinet, the variable current electrical cabinet and the like, so as to ensure that the electrical components are not short-circuited, damaged in insulation or corroded. When the passive humidity control apparatus is placed inside the electrical component, the passive humidity control apparatus is preferentially placed in the vent hole or the heat dissipation window on the premise of uniform distribution.
In the present embodiment, an environmentally friendly, recyclable passive humidity control apparatus is used, and the passive humidity control apparatus includes, but is not limited to, a super absorbent polymer, a breathable material, a composite fiber material, and the like.
In this embodiment, the control module 3 is configured to, when controlling the electrical component according to the predicted humidity value at the future preset time, give a predicted maintenance recommendation and an early warning, where the predicted maintenance recommendation and the early warning include, but are not limited to, a recommended replacement cycle value of the passive humidity control device and a sealing performance inspection recommendation of the electrical component.
The control module 3 is specifically configured to send out first warning information if the predicted humidity value at the future preset time is greater than the humidity demand threshold, where the first warning information is used to remind the passive humidity control device of the electrical component to be replaced before the future preset time, so that the actual humidity value at the future preset time is not greater than the humidity demand threshold.
Preferably, in this embodiment, the controlling the electrical component according to the predicted humidity value at the future preset time specifically includes: and before the actual humidity value at the future preset moment is larger than the humidity demand threshold, replacing the passive humidity control device of the electrical component. The humidity requirement threshold, which is an upper limit of humidity that is unacceptable and potentially ineffective for electrical components, is preferably 60% in this embodiment.
In this embodiment, the passive humidity control apparatus may be replaced before the predicted value of the weight of the water vapor absorbed by the passive humidity control apparatus at the future preset time is equal to the saturated water vapor weight value of the passive humidity control apparatus.
In this embodiment, when the control module 3 is configured to control the electrical component according to the humidity predicted value at the future preset time, the following observations of the tightness check of the electrical component are given:
the control module 3 is specifically configured to send out second warning information if a difference between historical humidity values of two identical electrical components at the same historical time exceeds a preset threshold or a difference between humidity predicted values at the same future preset time exceeds a preset threshold, where the second warning information is used to prompt an inspection and improve the sealing performance of an electrical component with a large humidity predicted value, so that the difference is smaller than the preset threshold.
Preferably, in this embodiment, the specifically controlling the electrical component according to the predicted value of humidity at the future preset time further includes: if the difference between the historical humidity values of any two identical electrical components at the same historical time exceeds a preset threshold or the difference between the humidity predicted values at the same future preset time exceeds a preset threshold, the sealing performance of the electrical component with a large humidity predicted value needs to be checked and improved.
In this embodiment, when the change tendencies of the historical humidity values of a plurality of electrical components of the same specification are different, the sealing performance of the electrical components other than the electrical component having the smallest rise in humidity value can be checked.
In this embodiment, in order to reduce external water vapor from entering the electrical component and improve humidity conditioning efficiency, a sealing assembly is generally used to seal the electrical component, where the sealing assembly includes, but is not limited to, a waterproof tape, a waterproof wrapping paper, a plastic film, and the like; for example, in the present embodiment, the ventilation holes, the heat dissipation windows, and the like of the electrical components are temporarily sealed with the waterproof tape to reduce the entry of external water vapor into the electrical components, thereby improving the humidity conditioning efficiency.
In an implementable scheme, on the basis that the first calculating module 2 obtains the humidity predicted value of the electrical component at the future preset time based on the historical humidity value, in order to more accurately obtain the humidity predicted value of the electrical component at the future preset time, as shown in fig. 4, the humidity control system of the electrical component of the wind turbine further includes a second obtaining module 4 and a second calculating module 5.
The second obtaining module 4 is used for obtaining the historical temperature value of the electrical component.
Specifically, historical temperature values of the electrical component are periodically collected, and the historical temperature values in each period are collected and averaged multiple times.
In this embodiment, the historical humidity value and the historical temperature value of the electrical component are periodically and simultaneously acquired by the temperature and humidity sensor in the electrical component. Namely, the sampling period and the collection times for collecting the historical temperature value of the electrical component are the same as the sampling period and the collection times for collecting the historical temperature value of the electrical component.
In the embodiment, a mobile wireless device is adopted to receive and store historical relative humidity values and historical temperature values of the electric components acquired and uploaded by the temperature and humidity sensor;
RH＝RH(1,2…N)；Temp＝Temp(1,2…N)；
wherein RH is the historical relative humidity value of the obtained electric component; rh (N) is a relative humidity value of the electrical component newly acquired at the nth sampling period; temp is a historical temperature value of the sampled and obtained electrical component; temp (N) is the temperature value of the electrical component newly obtained in the nth sampling period.
The second calculation module 5 is used for obtaining a predicted temperature value of the electrical component at a future preset time according to the historical temperature value.
In this embodiment, a least square fitting is adopted according to the acquired historical temperature value Temp of the electrical component, so as to obtain predicted temperature value Temp _ pred (N + K) of K periods after the current N sampling periods.
The first calculating module 2 is specifically configured to obtain the predicted humidity value of the electrical component at the future preset time (that is, the future preset time is K cycles after the current N sampling cycles) according to the historical humidity value and the predicted temperature value at the future preset time.
In this embodiment, a least square fitting is adopted according to the acquired historical relative humidity RH of the electrical component and the temperature predicted value Temp _ pred (N + K), so as to obtain the relative humidity predicted value RH _ pred (N + K) of K periods after the current N sampling periods.
In this embodiment, under a normal working condition, the relative humidity of the electrical component of the wind turbine generator that employs the passive humidity control device remains stable, that is, the humidity inside the electrical component is controlled to be below the humidity demand target value that is smaller than the humidity demand threshold value under an ideal working state of the passive humidity control device.
When the moisture absorption rate of the passive humidity control device reaches an upper limit (usually, the upper limit is 30% of the self weight of the passive humidity control device, and may be set to other values), the passive humidity control device cannot absorb water vapor in the air, and at this time, since the external water vapor enters the inside of the electrical component, the temperature remains unchanged or the relative humidity tends to rise when the temperature rises, the predicted value of the humidity at the future preset time needs to be predicted only based on the historical humidity value or based on the historical humidity value and the predicted value of the temperature at the future preset time, so as to prevent the actual humidity value at the future preset time from being greater than the humidity demand threshold.
In an implementation scheme, on the basis that the first calculating module 2 obtains the humidity predicted value of the electrical component at the future preset time based on the historical humidity value and the temperature predicted value at the future preset time, in order to more accurately obtain the humidity predicted value of the electrical component at the future preset time, as shown in fig. 4, the humidity control system of the electrical component of the wind turbine further includes a third obtaining module 6, a third calculating module 7, a fourth calculating module 8 and a fifth calculating module 9.
The third obtaining module 6 is configured to obtain an original weight value and a current weight value of the passive humidity control apparatus.
Specifically, the current weight value of the passive humidity control device is periodically acquired, and the current temperature value in each period is acquired and averaged for multiple times.
In this embodiment, the current weight value of the passive humidity control apparatus is periodically acquired by a weight sensor in the electrical component. The sampling period for acquiring the current weight value of the passive humidity control device is usually longer than the sampling period for acquiring the historical humidity value and the historical temperature value of the electrical component, for example, the sampling period for acquiring the historical humidity value and the historical temperature value of the electrical component may be one time acquired in 1 hour or one time acquired in several hours; the sampling period for acquiring the current weight value of the passive humidity adjusting device can be once every three days or once every week.
The third calculating module 7 is configured to obtain a weight value of the water vapor absorbed by the passive humidity control device according to the original weight value and the current weight value.
The fourth calculating module 8 is configured to obtain a total water vapor weight value entering the interior of the electrical component from the initial water vapor weight value in the air inside the electrical component, the current water vapor weight value in the air inside the electrical component, and the water vapor weight value absorbed by the passive humidity control device.
In this embodiment, the saturated water vapor content value per unit volume under the initial condition is obtained by a table lookup method including but not limited to the initial temperature value and the initial humidity value.
And obtaining the saturated water vapor content value of unit volume under the ideal condition at the future preset moment by adopting a table look-up method without limitation according to the temperature predicted value and the humidity demand target value at the future preset moment.
The saturated water vapor content per unit volume under the current condition and the saturated water vapor content per unit volume under the initial condition are respectively multiplied by the electric component internal blank volume value, so as to respectively obtain a current water vapor weight value in the electric component internal air (namely, the water vapor weight value in the electric component internal air under the current condition), an initial water vapor weight value in the electric component internal air (namely, the water vapor weight value in the electric component internal air under the initial condition), and a water vapor weight value in the electric component internal air at a preset time in the future (namely, the water vapor weight value in the electric component internal air under an ideal condition at a preset time in the future).
In this embodiment, the calculation formula for obtaining the total weight value of the water vapor entering the electrical component from the outside in unit time is as follows:
WT_unit＝(G1+G2-G3)/time_step*i
wherein, WT _ unit is the total weight value of water vapor entering the electric component from the outside in unit time; g1 is the current weight value of water vapor in the air inside the electrical component; g2 is the weight value of the water vapor absorbed by the passive humidity control device; g3 is the initial water vapor weight value in the air inside the electrical component; time _ step is the sampling period; i is the number of samples.
The fifth calculating module 9 is configured to obtain a predicted value of the weight of the water vapor absorbed by the passive humidity control device at a preset time in the future according to the total weight value of the water vapor.
In this embodiment, the calculation formula for obtaining the predicted value of the weight of the water vapor absorbed by the passive humidity control device at the preset time in the future is as follows:
Dehu_pred＝WT_unit*time_step*i+G3-G4
the Dehu _ pred is a predicted value of the weight of the water vapor absorbed by the passive humidity control device at a preset time in the future; g4 is the water vapor weight value in the air inside the electrical component at the future preset time.
The first calculating module 2 is specifically configured to obtain a predicted humidity value of the electrical component at the future preset time according to the humidity demand target value, the predicted weight of the absorbed water vapor at the future preset time, the saturated water vapor content value of the electrical component in unit volume at the future preset time, and the predicted temperature value at the future preset time.
In this embodiment, the calculation formula for obtaining the saturated water vapor content value per unit volume of the electrical component at the future preset time is as follows:
A＝(WT_unit*time_step*i+G3-Dehu_max)/V_cambinet
wherein A is a saturated water vapor content value of the electrical component in unit volume at a future preset time; dehu _ max is the maximum weight value of the passive humidity control device capable of absorbing water vapor; v _ Cambodiet is the effective volume of the electrical component.
In this embodiment, the first calculation module 2 is specifically configured to, when the predicted value of the weight of the water vapor absorbed by the passive humidity control device at the future preset time is less than or equal to the maximum weight value of the water vapor that can be absorbed by the passive humidity control device, make the predicted value of the humidity of the electrical component at the future preset time equal to the humidity demand target value. The humidity demand target value is a humidity value of the electrical component that is expected to be achieved after the passive humidity control device is used.
The first calculating module 2 is further specifically configured to, when the predicted value of the weight of the water vapor absorbed by the passive humidity control device at the future preset time is greater than the maximum weight value of the water vapor that can be absorbed by the passive humidity control device, obtain the predicted value of the humidity of the electrical component at the future preset time by using a table look-up method including but not limited to a table look-up method according to the saturated water vapor content value per unit volume of the electrical component at the future preset time and the predicted value of the temperature at the future preset time.
In this embodiment, the temperature and humidity sensor and the weight sensor are wireless sensors powered by lithium batteries.
The embodiment can also periodically collect the energy storage capacity and the service life of the lithium battery in the temperature and humidity sensor and the weight sensor so as to replace the lithium battery in time, thereby avoiding influencing the normal work of the temperature and humidity sensor and the weight sensor. It should be noted that the cycle of collecting the energy storage capacity and the service life of the lithium batteries in the temperature and humidity sensor and the weight sensor may be once a month or once in several months.
In this embodiment, the model selection calculation results of the passive humidity control device can be obtained according to the humidity requirement and the temperature requirement of the electrical component, the effective volume, the sealing performance, the maintenance frequency and the like, and the model selection calculation results include, but are not limited to, the number, the specification, the safety coefficient and the like; usually, the relative humidity requirement of the electrical component is less than or equal to 60 percent, the temperature requirement is less than or equal to 60 ℃, the effective volume is 30 to 70 percent, the protection level is not less than IP54, and the maintenance frequency is low when the wind turbine generator is not powered on, usually 1.5 times of the safety factor.
In the embodiment, the humidity predicted value of the electrical component at the future preset moment is obtained according to the acquired historical humidity value of the electrical component, and the electrical component is controlled according to the humidity predicted value at the future preset moment, so that the actual humidity value of the electrical component at the future preset moment meets the preset condition, the humidity value of the electrical component at the future preset moment is predicted, the control over the electrical component is realized based on the humidity predicted value at the future preset moment, the maintenance of the wind turbine generator is facilitated, and the control requirement on the humidity of the electrical component of the wind turbine generator is met.
Example 3
As shown in fig. 5, the humidity control system for electrical components of a wind turbine generator in this embodiment is a further improvement of embodiment 2, specifically:
the humidity control system of the electrical component of the wind turbine generator comprises a first acquisition module 1, a first calculation module 2, a control module 3, a second acquisition module 4, a second calculation module 5, a third acquisition module 6, a third calculation module 7, a fourth calculation module 8, a fifth calculation module 9 and an electrical component 10; the electrical components 10 include a passive humidity control apparatus 100, a temperature/humidity sensor 101, and a weight sensor 102.
In this embodiment, in a specific implementation process of a humidity control system of an electrical component of a wind turbine generator, a temperature and humidity sensor 101 respectively uploads a historical humidity value and a historical temperature value of the collected electrical component to a first acquisition module 1 and a second acquisition module 4; the weight sensor 102 uploads the acquired original weight value and current weight value of the passive humidity control device 100 to the third acquiring module 6, the first acquiring module 1 and the second acquiring module 4 respectively acquire the historical humidity value and historical temperature value of the electrical component and the original weight value and current weight value of the passive humidity control device 100 acquired by the third acquiring module 6 are calculated based on the second calculating module 5, the third calculating module 7, the fourth calculating module 8, the fifth calculating module 9 and the first calculating module 2, finally the temperature predicted value at the future preset time is obtained to obtain the humidity predicted value of the electrical component at the future preset time, and the control module 3 obtains the humidity predicted value of the electrical component at the future preset time based on the temperature predicted value at the future preset time to control the electrical component (i.e. remind of replacing the passive humidity control device of the electrical component before the future preset time or remind of checking and improve the electrical component with a larger humidity predicted value before the future preset time) The sealing performance of the piece) is improved, the control of the electrical component based on the humidity predicted value at the future preset moment is realized, and the maintenance of the wind turbine generator is facilitated.
Example 4
Fig. 6 is a schematic structural diagram of an electronic device according to embodiment 4 of the present invention. The electronic device includes a memory, a processor, and a computer program stored on the memory and executable on the processor, and when the processor executes the program, the humidity control method of the electrical component of the wind turbine generator according to embodiment 1 is implemented. The electronic device 30 shown in fig. 6 is only an example, and should not bring any limitation to the functions and the scope of use of the embodiment of the present invention.
As shown in fig. 6, the electronic device 30 may be embodied in the form of a general purpose computing device, which may be, for example, a server device. The components of the electronic device 30 may include, but are not limited to: the at least one processor 31, the at least one memory 32, and a bus 33 connecting the various system components (including the memory 32 and the processor 31).
The bus 33 includes a data bus, an address bus, and a control bus.
The memory 32 may include volatile memory, such as Random Access Memory (RAM)321 and/or cache memory 322, and may further include Read Only Memory (ROM) 323.
Memory 32 may also include a program/utility 325 having a set (at least one) of program modules 324, such program modules 324 including, but not limited to: an operating system, one or more application programs, other program modules, and program data, each of which, or some combination thereof, may comprise an implementation of a network environment.
The processor 31 executes various functional applications and data processing, such as a humidity control method of an electrical component of a wind turbine generator according to embodiment 1 of the present invention, by executing a computer program stored in the memory 32.
The electronic device 30 may also communicate with one or more external devices 34 (e.g., keyboard, pointing device, etc.). Such communication may be through input/output (I/O) interfaces 35. Also, model-generating device 30 may also communicate with one or more networks (e.g., a Local Area Network (LAN), a Wide Area Network (WAN), and/or a public network, such as the Internet) via network adapter 36. As shown in FIG. 6, network adapter 36 communicates with the other modules of model-generating device 30 via bus 33. It should be understood that although not shown in the figures, other hardware and/or software modules may be used in conjunction with the model-generating device 30, including but not limited to: microcode, device drivers, redundant processors, external disk drive arrays, RAID (disk array) systems, tape drives, and data backup storage systems, etc.
It should be noted that although in the above detailed description several units/modules or sub-units/modules of the electronic device are mentioned, such a division is merely exemplary and not mandatory. Indeed, the features and functionality of two or more of the units/modules described above may be embodied in one unit/module according to embodiments of the invention. Conversely, the features and functions of one unit/module described above may be further divided into embodiments by a plurality of units/modules.
Example 5
The present embodiment provides a computer-readable storage medium on which a computer program is stored, which when executed by a processor implements the steps of the humidity control method of the electrical component of the wind turbine provided in embodiment 1.
More specific examples, among others, that the readable storage medium may employ may include, but are not limited to: a portable disk, a hard disk, random access memory, read only memory, erasable programmable read only memory, optical storage device, magnetic storage device, or any suitable combination of the foregoing.
In a possible embodiment, the invention can also be implemented in the form of a program product comprising program code for causing a terminal device to carry out the steps of the method for controlling the humidity of an electrical component of a wind turbine generator as described in example 1, when the program product is run on the terminal device.
Where program code for carrying out the invention is written in any combination of one or more programming languages, the program code may execute entirely on the user device, partly on the user device, as a stand-alone software package, partly on the user device and partly on a remote device or entirely on the remote device.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.

Claims (12)

1. A humidity control method for electrical components of a wind turbine generator system is characterized by comprising the following steps:
acquiring a historical humidity value of the electrical component;
obtaining a humidity predicted value of the electrical component at a future preset moment according to the historical humidity value;
controlling the electrical component according to the humidity predicted value at the future preset moment so that the actual humidity value of the electrical component at the future preset moment meets a preset condition;
the electrical component is provided with a passive humidity control device, and the step of controlling the electrical component according to the humidity predicted value at the future preset time comprises the following steps:
if the predicted humidity value at the future preset time is greater than a humidity demand threshold, sending first early warning information, wherein the first early warning information is used for reminding a passive humidity control device of the electrical component to be replaced before the future preset time, so that the actual humidity value at the future preset time is not greater than the humidity demand threshold;
the humidity control method further includes:
acquiring a historical temperature value of the electrical component;
obtaining a predicted temperature value of the electrical component at the future preset moment according to the historical temperature value;
obtaining a predicted humidity value of the electrical component at a future preset time according to the historical humidity value specifically comprises:
obtaining a humidity predicted value of the electrical component at the future preset time according to the historical humidity value and the temperature predicted value at the future preset time;
the humidity control method further includes:
acquiring an original weight value and a current weight value of the passive humidity adjusting device;
obtaining a weight value of the water vapor absorbed by the passive humidity control device according to the original weight value and the current weight value;
obtaining a total water vapor weight value entering the interior of the electrical component from the outside in unit time according to the initial water vapor weight value in the air in the interior of the electrical component, the current water vapor weight value in the air in the interior of the electrical component and the water vapor weight value absorbed by the passive humidity control device;
according to the total weight value of the water vapor entering the electric component from the outside in unit time, obtaining a predicted value of the weight of the water vapor absorbed by the passive humidity control device at the future preset time;
the step of obtaining the predicted humidity value of the electrical component at the future preset time according to the historical humidity value specifically comprises the following steps:
and obtaining the humidity predicted value of the electrical component at the future preset time according to the humidity demand target value, the predicted value of the weight of the absorbed water vapor at the future preset time, the saturated water vapor content value of the unit volume of the electrical component at the future preset time and the predicted value of the temperature at the future preset time.
2. The method for controlling humidity of an electrical component of a wind turbine according to claim 1, wherein the step of controlling the electrical component according to the humidity prediction value at the future preset time further comprises:
and if the difference value of the historical humidity values between two same electrical components exceeds a preset threshold value or the difference value of the humidity predicted values at the future preset moment exceeds a preset threshold value, sending second early warning information, wherein the second early warning information is used for reminding the inspection and improving the sealing performance of the electrical components with larger humidity predicted values so as to enable the difference value to be smaller than the preset threshold value.
3. The method for controlling the humidity of the electrical component of the wind turbine generator according to claim 1, wherein the calculation formula for obtaining the weight value of the total water vapor entering the electrical component from the outside in unit time is as follows:
WT_unit＝(G1+G2-G3)/time_step*i
wherein, WT _ unit is the total weight value of water vapor entering the electric component from the outside in unit time; g1 is the current weight value of water vapor in the air inside the electrical component; g2 is the weight value of the water vapor absorbed by the passive humidity control device; g3 is the initial water vapor weight value in the air inside the electrical component; time _ step is the sampling period; i is the sampling frequency;
the calculation formula for obtaining the predicted value of the weight of the water vapor absorbed by the passive humidity control device at the future preset time is as follows:
Dehu_pred＝WT_unit*time_step*i+G3-G4
the Dehu _ pred is a predicted value of the weight of the water vapor absorbed by the passive humidity control device at a preset time in the future; g4 is the weight value of the water vapor in the air inside the electric component at the future preset moment;
the calculation formula for obtaining the saturated water vapor content value of the electric component in unit volume at the future preset time is as follows:
A＝(WT_unit*time_step*i+G3-Dehu_max)/V_cambinet
wherein A is a saturated water vapor content value of the electrical component in unit volume at a future preset time; dehu _ max is the maximum weight value of the passive humidity control device capable of absorbing water vapor; v _ Cambodiet is the effective volume of the electrical component.
4. The method according to claim 3, wherein the obtaining the predicted humidity value of the electrical component at the future preset time according to the humidity demand target value, the predicted weight of the absorbed water vapor at the future preset time, the saturated water vapor content per unit volume of the electrical component at the future preset time, and the predicted temperature value at the future preset time specifically comprises:
when the predicted value of the weight of the water vapor absorbed at the future preset time is less than or equal to the maximum weight value of the water vapor which can be absorbed by the passive humidity control device, the predicted value of the humidity of the electrical component at the future preset time is equal to the humidity demand target value;
and when the predicted value of the weight of the water vapor absorbed at the future preset time is greater than the maximum weight value of the water vapor absorbed by the passive humidity control device, obtaining the predicted value of the humidity of the electrical component at the future preset time by adopting a table look-up method including but not limited to the table look-up method according to the saturated water vapor content value of the unit volume of the electrical component at the future preset time and the predicted value of the temperature at the future preset time.
5. The method for controlling humidity of an electrical component of a wind turbine generator according to claim 4, wherein the obtaining of the historical humidity value of the electrical component specifically comprises:
periodically collecting historical humidity values of the electrical components, and collecting and averaging the historical humidity values in each period for multiple times to obtain an average value as the historical humidity value in the period;
and/or the presence of a gas in the gas,
the acquiring the historical temperature value of the electrical component specifically includes:
the method comprises the steps of periodically collecting historical temperature values of the electrical components, and collecting and averaging for multiple times in each period to serve as the historical temperature values in the period;
and/or the presence of a gas in the gas,
the acquiring of the current weight value of the passive humidity control device specifically comprises:
the current weight value of the passive humidity adjusting device is periodically acquired, and the current weight value in each period is acquired and averaged for use as the current weight value in the period.
6. The humidity control system for the electrical components of the wind turbine generator is characterized by comprising a first acquisition module, a first calculation module and a control module;
the first acquisition module is used for acquiring a historical humidity value of the electrical component;
the first calculation module is used for obtaining a humidity predicted value of the electrical component at a future preset moment according to the historical humidity value;
the control module is used for controlling the electrical component according to the humidity predicted value at the future preset time, so that the actual humidity value of the electrical component at the future preset time meets a preset condition;
the control module is specifically used for sending first early warning information if the predicted humidity value at the future preset time is greater than a humidity demand threshold, and the first early warning information is used for reminding the passive humidity control device of the electrical component to be replaced before the future preset time so that the actual humidity value at the future preset time is not greater than the humidity demand threshold;
the humidity control system further comprises a second acquisition module and a second calculation module;
the second acquisition module is used for acquiring a historical temperature value of the electrical component;
the second calculation module is used for obtaining a predicted temperature value of the electrical component at the future preset time according to the historical temperature value;
the first calculation module is specifically used for obtaining a humidity predicted value of the electrical component at the future preset time according to the historical humidity value and the temperature predicted value at the future preset time;
the humidity control system also comprises a third acquisition module, a third calculation module, a fourth calculation module and a fifth calculation module;
the third obtaining module is used for obtaining an original weight value and a current weight value of the passive humidity adjusting device;
the third calculation module is used for obtaining a weight value of the water vapor absorbed by the passive humidity control device according to the original weight value and the current weight value;
the fourth calculation module is used for obtaining a total water vapor weight value entering the interior of the electrical component from the outside in unit time according to the initial water vapor weight value in the air inside the electrical component, the current water vapor weight value in the air inside the electrical component and the water vapor weight value absorbed by the passive humidity control device;
the fifth calculation module is used for obtaining a predicted value of the weight of the water vapor absorbed by the passive humidity control device at the future preset time according to the total weight value of the water vapor entering the electrical component from the outside in the unit time;
the first calculation module is specifically configured to obtain a predicted humidity value of the electrical component at the future preset time according to the humidity demand target value, the predicted weight of the absorbed water vapor at the future preset time, the saturated water vapor content value of the electrical component at the unit volume at the future preset time, and the predicted temperature value at the future preset time.
7. The humidity control system of an electrical component of a wind turbine generator according to claim 6, wherein the control module is further configured to send out second warning information if a difference between the historical humidity values of two identical electrical components exceeds a preset threshold or a difference between the humidity predicted values at the future preset time exceeds a preset threshold, where the second warning information is used to prompt an inspection and improve the sealing performance of the electrical component with a larger humidity predicted value, so that the difference is smaller than the preset threshold.
8. The humidity control system for electrical components of wind turbine generator set according to claim 6, wherein the calculation formula for obtaining the weight value of the total water vapor entering the electrical components from the outside per unit time is:
WT_unit＝(G1+G2-G3)/time_step*i
wherein, WT _ unit is the total weight value of water vapor entering the electric component from the outside in unit time; g1 is the current weight value of water vapor in the air inside the electrical component; g2 is the weight value of the water vapor absorbed by the passive humidity control device; g3 is the initial water vapor weight value in the air inside the electrical component; time _ step is the sampling period; i is the sampling frequency;
the calculation formula for obtaining the predicted value of the weight of the water vapor absorbed by the passive humidity control device at the future preset time is as follows:
Dehu_pred＝WT_unit*time_step*i+G3-G4
the Dehu _ pred is a predicted value of the weight of the water vapor absorbed by the passive humidity control device at a preset time in the future; g4 is the weight value of the water vapor in the air inside the electric component at the future preset moment;
the calculation formula for obtaining the saturated water vapor content value of the electric component in unit volume at the future preset time is as follows:
A＝(WT_unit*time_step*i+G3-Dehu_max)/V_cambinet
wherein A is a saturated water vapor content value of the electrical component in unit volume at a future preset time; dehu _ max is the maximum weight value of the passive humidity control device capable of absorbing water vapor; v _ Cambodiet is the effective volume of the electrical component.
9. The humidity control system of an electrical component of a wind turbine generator according to claim 8, wherein the first calculating module is specifically configured to, when the predicted value of the weight of the absorbed water vapor at the future preset time is less than or equal to the maximum weight value of the water vapor that can be absorbed by the passive humidity control device, make the predicted value of the humidity of the electrical component at the future preset time equal to the humidity demand target value;
the first calculating module is further specifically configured to, when the predicted value of the weight of the water vapor absorbed at the future preset time is greater than the maximum weight value of the water vapor that can be absorbed by the passive humidity control apparatus, obtain the predicted value of the humidity of the electrical component at the future preset time by using a table look-up method including but not limited to a table look-up method according to the saturated water vapor content value of the unit volume of the electrical component at the future preset time and the predicted value of the temperature at the future preset time.
10. The humidity control system of an electrical component of a wind turbine generator set according to claim 9, wherein the first obtaining module is specifically configured to periodically collect historical humidity values of the electrical component, and collect and average multiple times in each period as the historical humidity values in the period;
and/or the presence of a gas in the gas,
the second acquisition module is specifically used for periodically acquiring historical temperature values of the electrical component, and acquiring and averaging the historical temperature values for multiple times in each period to obtain an average value as the historical temperature value in the period;
and/or the presence of a gas in the gas,
the third obtaining module is specifically configured to periodically collect the current weight value of the passive humidity control device, and collect multiple times in each period and take an average value as the current weight value in the period.
11. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the method for humidity control of an electrical component of a wind turbine as claimed in any one of claims 1 to 5 when executing the computer program.
12. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out a method for humidity control of an electrical component of a wind turbine as set forth in any of claims 1 to 5.
CN202110649789.3A 2021-06-10 2021-06-10 Humidity control method, system, equipment and medium for electrical components of wind turbine generator Active CN113325906B (en)

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