Anti-corrosion system, anti-corrosion method, wind turbine generator set and computer equipment

Abstract

The present application provides an anti-corrosion system, an anti-corrosion method, a wind turbine generator set, and a computer device. The anti-corrosion system includes: a detection unit for obtaining the humidity of the air inside the tower barrel; a temperature adjustment unit for adjusting the temperature of the air inside the tower barrel; and a control unit for controlling the temperature adjustment unit according to the humidity detected by the detection unit to adjust the temperature of the air inside the tower barrel to a predetermined temperature range. When the temperature of the air inside the tower barrel remains within the predetermined temperature range, the humidity of the air inside the tower barrel is lower than the critical corrosion humidity of the metal. The embodiments of the present application use a temperature adjustment unit to increase the temperature and dehumidify, and control the humidity of the air in the bottom space of the tower barrel below the critical corrosion relative humidity of the metal, so as to be able to reduce the corrosion rate of the metal, and have the advantages of low cost, simple operation, high dehumidification and anti-corrosion efficiency, etc.

Description

Technical Field

[0001] The present disclosure relates to the technical field of wind power generation, and in particular, to an anti-corrosion system for a wind turbine tower, a wind turbine generator set including the anti-corrosion system, an anti-corrosion method, a computer-readable storage medium including a computer program for executing the anti-corrosion method, and a computer device. Background Art

[0002] A large number of electrical devices are arranged in the nacelle and the tower of a wind turbine generator set. For these electrical devices mainly made of metal materials, if the air humidity is relatively high, they are prone to corrosion, resulting in a reduced service life. Especially when the unit is installed in coastal areas or at sea, due to the significant increase in air humidity and salt content, the corrosion problem is more serious. Therefore, in order to reduce the corrosion rate of electrical devices, measures such as dehumidifying the air are usually taken.

[0003] In the wind power industry, traditional dehumidification solutions mainly dehumidify the internal air of a wind turbine generator set (WTGS, wind turbine generator system) by using a rotary dehumidifier or a compressor dehumidifier. For wind turbine generator sets using rotary dehumidification or compressor dehumidification, the main heating devices all adopt external cooling devices. During the dehumidification process, it is only necessary to consider the dehumidification conditions of a relatively enclosed space without considering the heat dissipation of the wind turbine generator set. Therefore, the power requirements for the dehumidifier and the air conditioner are relatively low.

[0004] For a wind turbine generator set using air cooling, when the heat generation of the wind turbine generator set is large, a large amount of external air needs to be introduced into the tower to cool electrical devices (such as inverters, reactors, etc.). However, for a wind turbine generator set using air cooling, due to the open environment, especially when the unit is installed in coastal or seaside areas with high temperature and high humidity, the air contains a large amount of water vapor and salt. When the external cold air is pumped into the tower by the internal cooling fan to cool the inverter and then discharged outside the tower, the high-temperature and high-humidity air introduced from the nacelle is likely to cause electrochemical corrosion of the electrical devices in the tower.

[0005] Therefore, when using external air for cooling, it is necessary to consider not only the heat dissipation in the unit but also the dehumidification of the air. However, the current rotary dehumidification and air conditioner power cannot meet the engineering technology and economic requirements.

[0006] Therefore, for a wind turbine generator set using air cooling, especially those installed in coastal and offshore areas, how to simultaneously solve the cooling and corrosion resistance problems is a difficult problem faced by those skilled in the art. Summary of the Invention

[0007] One of the objectives of the present application is to provide a corrosion prevention system for a wind turbine tower, a wind turbine generator set including the corrosion prevention system, a corrosion prevention method, and a computer-readable storage medium and a computer device including a computer program for executing the corrosion prevention method.

[0008] According to one aspect of the present application, there is provided a corrosion prevention system for preventing metal corrosion in a wind turbine tower. The corrosion prevention system includes: a detection unit for obtaining the humidity of the air inside the tower; a temperature adjustment unit for adjusting the temperature of the air inside the tower; and a control unit for controlling the temperature adjustment unit according to the humidity detected by the detection unit to adjust the temperature of the air inside the tower to a predetermined temperature range. When the temperature of the air inside the tower remains within the predetermined temperature range, the humidity of the air inside the tower is lower than the critical corrosion humidity of the metal.

[0009] For the corrosion prevention system provided by the embodiments of the present application, when the detection unit obtains the humidity of the air inside the tower, the control unit controls the temperature adjustment unit to adjust the temperature of the air inside the tower according to the humidity, so that the temperature of the air inside the tower remains within a predetermined temperature range, thereby making the humidity of the air inside the tower lower than the critical corrosion humidity of the metal, achieving the purpose of reducing the speed of metal corrosion.

[0010] In some embodiments, the temperature adjustment unit includes: a hot air device for heating the air inside the tower; and / or an adjustable air valve provided at the air outlet at the bottom of the tower for adjusting the air discharge volume at the air outlet; the control unit controls the start and stop of the hot air device and / or adjusts the opening degree of the adjustable air valve according to the humidity detected by the detection unit.

[0011] For the corrosion prevention system provided by the embodiments of the present application, when the detection unit obtains the humidity of the air inside the tower, the control unit controls the start and stop of the hot air device and / or adjusts the opening degree of the adjustable air valve according to the humidity to adjust the temperature of the air inside the tower, so that the temperature of the air inside the tower remains within a predetermined temperature range, thereby making the humidity of the air inside the tower lower than the critical corrosion humidity of the metal, achieving the purpose of preventing metal corrosion.

[0012] In some embodiments, the control unit is configured to: when the wind turbine is in an operating state and the humidity detected by the detection unit is higher than a first preset humidity, adjust the opening degree of the adjustable air valve and / or turn on the hot air device so that the temperature of the space at the bottom of the tower barrel rises to within the predetermined temperature range; when the wind turbine is in an operating state and the humidity detected by the detection unit is not higher than the first preset humidity, turn off the hot air device and adjust the temperature of the air inside the tower barrel by adjusting the opening degree of the adjustable air valve, wherein the first predetermined humidity is less than or equal to the critical corrosion humidity of the metal.

[0013] In some embodiments, the control unit is further configured to: when the wind turbine is in a non-operating state, close the adjustable air valve and turn on the hot air device when the humidity detected by the detection unit is greater than or equal to a first preset humidity, and turn off the hot air device when the humidity drops below a second preset humidity.

[0014] In some embodiments, in the step of adjusting the opening degree of the adjustable air valve and / or turning on the hot air device so that the temperature of the space at the bottom of the tower barrel rises to within the predetermined temperature range when the wind turbine is in an operating state and the humidity detected by the detection unit is higher than a first preset humidity, when the opening degree of the adjustable air valve is lower than a predetermined opening degree, then turn on the hot air device.

[0015] In some embodiments, in the step of adjusting the opening degree of the adjustable air valve and / or turning on the hot air device so that the temperature of the space at the bottom of the tower barrel rises to within the predetermined temperature range when the humidity detected by the detection unit is higher than a first predetermined humidity, when the power of the wind turbine does not exceed a predetermined power and / or the power change rate of the wind turbine exceeds a predetermined change rate, adjust the opening degree of the adjustable air valve and / or turn on the hot air device; when the power of the wind turbine is greater than the predetermined power and the power change rate of the wind turbine does not exceed the predetermined change rate, adjust the opening degree of the adjustable air valve without turning on the hot air device.

[0016] In some embodiments, the detection unit is further configured to detect the temperature of the air inside the tower barrel; the control unit is further configured to: when the humidity detected by the detection unit is higher than the first predetermined humidity and the temperature detected by the detection unit exceeds the temperature threshold, turn off the hot air device and adjust the opening degree of the adjustable air valve; when the humidity detected by the detection unit is higher than the first predetermined humidity and the temperature detected by the detection unit is lower than the temperature threshold, adjust the opening degree of the adjustable air valve and / or turn on the hot air device so that the temperature of the air inside the tower barrel rises to a predetermined temperature range.

[0017] In some embodiments, the hot air device includes: a heater for heating air; an air duct, the outlet end of which extends towards the converter inside the tower barrel for delivering the heated air to the converter; a temperature sensor disposed at the outlet of the air duct for measuring the temperature at the outlet of the air duct; an exhaust fan communicated with the air duct; an anti-corrosion controller for adjusting the rotation speed of the exhaust fan and / or the opening degree of the adjustable air valve according to the predetermined temperature range.

[0018] In some embodiments, the hot air device and the converter are installed on the same installation platform.

[0019] According to another aspect of the present application, there is also provided a wind power generating set, which includes the anti-corrosion system described above.

[0020] According to another aspect of the present application, there is also provided an anti-corrosion method for preventing metal corrosion inside the tower barrel of a wind power generating set, characterized in that the anti-corrosion method includes: obtaining the humidity of the air in the space at the bottom of the tower barrel; adjusting the temperature of the air inside the tower barrel to a predetermined temperature range according to the detected humidity, and when the temperature of the air inside the tower barrel remains within the predetermined temperature range, the humidity of the air inside the tower barrel is lower than the critical corrosion humidity of the metal.

[0021] In some embodiments, the temperature of the air inside the tower barrel is adjusted by the following methods: heating the air inside the tower barrel; and / or adjusting the exhaust air volume at the exhaust port at the bottom of the tower barrel.

[0022] According to another aspect of the present application, there is also provided a computer program, which, when executed by a processor, implements the above anti-corrosion method.

[0023] According to another aspect of the present application, there is also provided a computer device, which includes:

[0024] a processor; and a memory storing a computer program, which, when executed by the processor, implements the above anti-corrosion method. Description of the Drawings

[0025] Through the following description of the embodiments in conjunction with the drawings, the above and / or other objects and advantages of the present application will become clearer, where:

[0026] Figure 1 Fig. shows a schematic structural diagram of the installation of an anti-corrosion system for a wind turbine provided by an embodiment of the present application;

[0027] Figure 2 Fig. is a schematic diagram showing the relationship between the relative weight gain of corrosion products of several specimens provided by an embodiment of the present application and relative humidity;

[0028] Figure 3 Fig. is a relationship diagram between power and temperature rise measured based on the actual operating conditions of a wind turbine according to the present application;

[0029] Figure 4 Fig. shows a schematic structural diagram of the installation of a hot air device provided by an embodiment of the present application;

[0030] Figure 5 Fig. shows a schematic diagram of an adjustable air valve in the maximum opening state provided by an embodiment of the present application;

[0031] Figure 6 Fig. shows a schematic diagram of an adjustable air valve in the minimum opening state provided by an embodiment of the present application;

[0032] Figure 7 Fig. shows a schematic flow diagram of an anti-corrosion method provided by an embodiment of the present application.

[0033] Explanation of the reference numerals in the drawings:

[0034] 1: Converter, 2: Cooling fan, 3: Reactor, 4: Exhaust fan, 5: Tower barrel, 6: Cabin, 7: Wind turbine, 9: Exhaust air duct, 100: Detection unit, 200: Control unit, 300: Hot air device, 310: Heater, 320: Air duct, 330: Exhaust fan, 340: Anti-corrosion controller, 400: Adjustable air valve, 410: Electric actuator, 420: Electric butterfly valve. Detailed Embodiments

[0035] Hereinafter, with reference to the drawings, the anti-corrosion system, the wind turbine of the anti-corrosion system, the anti-corrosion method, and the computer-readable storage medium and computer device including the same according to the embodiments of the present application will be described in detail. The same reference numerals in the drawings always indicate the same components.

[0036] Figure 1 Fig. shows a schematic structural diagram of the installation of an anti-corrosion system for a wind turbine provided by an embodiment of the present application. As Figure 1As shown, the anti-corrosion system according to an embodiment of the present invention can be installed in the tower barrel 5 of a wind turbine generator set. For example, it is installed at the bottom of the tower barrel 5 to prevent electrochemical corrosion of electrical equipment (such as the converter 1 and reactor 3 installed at the bottom of the tower barrel) inside the tower barrel of the wind turbine generator set. The anti-corrosion system includes: a detection unit 100, a control unit 200, and a temperature regulation unit. Among them, the detection unit 100 is used to obtain the temperature and humidity of the air inside the tower barrel 5; the temperature regulation unit is used to regulate the temperature of the air inside the tower barrel 5; the control unit 200 is used to control the temperature regulation unit according to the humidity detected by the detection unit 100 to regulate the temperature of the air inside the tower barrel 5 to a predetermined temperature range. When the temperature of the air inside the tower barrel is maintained within the predetermined temperature range, the humidity of the air inside the tower barrel 5 is lower than the critical corrosion humidity of the metal in the electrical equipment.

[0037] In an embodiment of the present application, the detection unit 100 may include a temperature sensor, a humidity sensor, etc. In an embodiment of the present application, the detection unit 100 is arranged in the bottom space of the tower barrel 5 to determine the humidity of the air in the bottom space of the tower barrel 5. When the detection unit 100 includes a humidity sensor, the humidity of the air in the bottom space of the tower barrel can be directly measured by the humidity sensor. When the detection unit 100 includes a temperature sensor, the temperature of the air in the bottom space can be obtained by the temperature sensor, and then the humidity of the air in the bottom space of the tower barrel can be determined through the corresponding relationship between the temperature and relative humidity of the air in the bottom space.

[0038] In an embodiment of the present application, the temperature regulation unit may include a hot air device 300 and / or an adjustable air valve 400. The hot air device 300 is used to heat the air inside the tower barrel 5 and discharge the heated air to the air inlet of the pipeline for cooling the converter 1. A cooling fan 2 may be arranged at this air inlet to drive the cold air to flow through the converter 1. The adjustable air valve 400 may be arranged at the air outlet at the bottom of the tower barrel and is used to control the air flow rate and flow velocity by adjusting the valve opening, thereby adjusting the temperature of the air inside the tower barrel, and further adjusting the humidity of the air inside the tower barrel to be lower than the critical corrosion humidity of the electrical equipment. The larger the opening of the adjustable air valve 400, the faster the heat dissipation; the smaller the opening, the slower the heat dissipation. The temperature regulation unit can use the adjustable air valve 400 or the hot air device 300 alone or in combination, and regulate the temperature of the bottom space of the tower barrel by heating the air inside the tower barrel and / or adjusting the air discharge volume at the air outlet, so as to control the humidity of the air used to cool and lower the temperature of the converter 1, thereby reducing the corrosion rate of components such as the converter 1.

[0039] When the air temperature inside the tower barrel 5 is relatively high and cannot meet the heat dissipation requirements of electrical equipment, for example, when the air temperature inside the tower barrel 5 is higher than the set temperature threshold, the opening degree of the adjustable air valve 400 can be increased to accelerate the heat dissipation rate of the electrical equipment inside the tower barrel 5. When the air temperature inside the tower barrel 5 is lower than the set temperature threshold and the air humidity inside the tower barrel 5 is relatively high, the opening degree of the adjustable air valve 400 can be decreased to reduce the heat dissipation rate, and the heat generated by the electrical equipment itself is used to heat the air inside the tower barrel 5, so as to achieve the purpose of reducing humidity. In addition, when the air humidity still cannot be reduced below the first predetermined humidity by closing the opening degree of the adjustable air valve 400 to a predetermined opening degree and using the heat of the electrical equipment itself, the hot air equipment 300 can be turned on to heat the air inside the tower barrel 5 to reduce the air humidity.

[0040] During the operation of the unit, it is necessary to give priority to meeting the cooling requirements of electrical equipment and at the same time take into account the anti-corrosion problem of electrical equipment. For example, when the air temperature inside the tower barrel exceeds the preset temperature threshold, priority should be given to the cooling of electrical equipment. When the operating temperature of the electrical equipment is controlled below the preset temperature value, the temperature of the air used for cooling the electrical equipment inside the tower barrel is controlled within a predetermined temperature range, so as to achieve the purpose of controlling the humidity within a predetermined humidity range, making the humidity lower than the critical corrosion humidity of the electrical equipment. The operating temperature of the electrical equipment exceeding the temperature alarm value is usually a temporary state, while anti-corrosion is a long-term continuous process. Therefore, when the temperature of the electrical equipment is relatively high, the cooling problem of the electrical equipment can be preferentially handled.

[0041] In the embodiments of the present application, the critical corrosion humidity refers to the critical value of the relative humidity of the atmosphere that causes a sharp increase in the metal corrosion rate. Figure 2 It is a schematic diagram showing the relationship between the relative weight gain of the corrosion products and the relative humidity of several specimens provided in the embodiments of the present application. As Figure 2 shown, it can be seen that before the relative humidity is less than 65%, the relative weight gain rate of the corrosion products of most alloy specimens is relatively slow, indicating that the corrosion rate is not fast. However, after exceeding 80%, the relative weight gain rate of the corrosion products of most alloy specimens becomes faster, indicating that the corrosion rate is very fast. That is to say, each alloy specimen has a slow corrosion rate below the critical humidity and a fast corrosion rate above the critical humidity. Exemplarily, the critical humidity of iron is 65%, the critical humidity of aluminum is 76%, the critical humidity of zinc is 70%, the critical humidity of aluminum is 76%, and the critical humidity of nickel is 70%.

[0042] When an electrical device contains multiple metal materials, due to certain differences in the critical corrosion humidity of various metals, a predetermined humidity value can be set, which is called the first predetermined humidity here. The first predetermined humidity can be less than the critical corrosion humidity of all metals in the electrical device or equal to the minimum critical corrosion humidity. Usually, when the relative humidity of the air is lower than 65%, most metals are difficult to undergo electrochemical corrosion. Therefore, the humidity value of 65% can be defined as the critical corrosion humidity of metals, and the first predetermined humidity can be set to 60%. When controlling the humidity of the air inside the tower barrel according to the control unit 200 of the embodiments of the present application, the air humidity can be controlled to be lower than the first predetermined humidity to improve the reliability of the anti-corrosion effect.

[0043] In the embodiments of the present application, the temperature corresponding to the humidity can be determined according to the correspondence between humidity and temperature. The predetermined temperature range refers to the predetermined temperature range of the air inside the tower barrel 5 calculated according to the air enthalpy-humidity diagram when the humidity at the bottom space of the tower barrel 5 is lower than the critical corrosion humidity of metals, and the predetermined temperature range of the bottom space of the tower barrel 5 is lower than the set temperature alarm value of the electrical device. Exemplarily, when the humidity at the bottom space of the tower barrel 5 is 56.32%, 57.51%, and 58.67% respectively, the temperatures at the bottom of the tower barrel 5 are 25, 30, and 35 degrees respectively. For the anti-corrosion system provided by the embodiments of the present application, when the detection unit 100 obtains the humidity of the air in the bottom space of the tower barrel 5, the control unit 200 controls the temperature adjustment unit according to the humidity to adjust the temperature of the bottom space of the tower barrel 5, so that the temperature of the bottom space of the tower barrel 5 is maintained within the predetermined temperature range, thereby making the humidity of the bottom space of the tower barrel 5 lower than the critical corrosion humidity of metals, and achieving the purpose of reducing the metal corrosion rate by controlling the temperature.

[0044] According to the embodiments of the present application, a hot air device 300 is used for heating and an adjustable air valve 400 is used to adjust the air discharge volume to achieve the effect of heating and dehumidifying. While cleverly using the heat generated by the wind turbine generator itself for dehumidification during power generation, it also ensures dehumidification when the unit is operating at low power or stopped without wind; moreover, compared with dehumidification methods such as rotors, the dehumidification target of the embodiments of the present application does not require removing the maximum amount of humidity in the air, but only needs to control the air humidity below the relative humidity of critical metal corrosion, which greatly improves the dehumidification efficiency of the product and reduces the material cost, installation technical requirements, and energy consumption during the dehumidification process of the equipment.

[0045] In the embodiments of the present application, the control unit 200 can be connected to the power module of the wind turbine generator. By obtaining the power magnitude of the wind turbine generator, the operating state of the wind turbine generator is determined. When the power is greater than a preset power threshold, it can be determined that the wind turbine generator is in an operating state; when the power is less than the preset power threshold, it can be determined that the wind turbine generator is in a non-operating state.

[0046] In some embodiments, the control unit 200 is configured to: when the wind turbine generator set is in an operating state and the temperature of the air inside the tower barrel is lower than a predetermined temperature value (for example, 80% of the temperature alarm value), if the humidity detected by the detection unit 100 exceeds a first predetermined humidity, adjust the opening degree of the adjustable air valve 400 and / or turn on the hot air device 300 so that the temperature of the bottom space of the tower barrel 5 rises to within the predetermined temperature range; when the wind turbine generator set is in an operating state and the humidity detected by the detection unit 100 is lower than the first predetermined humidity, turn off the hot air device 300 and control the temperature and humidity by adjusting the opening degree of the adjustable air valve 400.

[0047] In some embodiments, when the wind turbine generator set is in an operating state, temperature and humidity control can be performed by determining whether the humidity continuously exceeds the first predetermined humidity, thereby preventing frequent disturbances to the control system. Therefore, the controller can be configured to: when the relative humidity continuously reaches or exceeds the first predetermined humidity, adjust the opening degree of the adjustable air valve 400 and / or turn on the hot air device 300 so that the temperature of the bottom space of the tower barrel 5 rises to within the predetermined temperature range; when the wind turbine generator set is in an operating state and the relative humidity detected by the detection unit 100 does not continuously exceed the first predetermined humidity, turn off the hot air device 300 and control the temperature and humidity by adjusting the opening degree of the adjustable air valve 400. In the embodiments of the present application, the duration refers to determining whether the relative humidity continuously exceeds the first predetermined humidity through average value delay. For example, within a duration of 30 minutes, it is determined whether the relative humidity continuously exceeds the first predetermined humidity.

[0048] In some embodiments, the control unit 200 is configured to: when the generator set is in a non-operating state, close the adjustable air valve 400, and if the humidity detected by the detection unit 100 reaches or exceeds the first predetermined humidity, turn on the hot air device 300 to heat the air to reduce the humidity of the air. When the relative humidity of the air is lower than the first predetermined humidity, turn off the hot air device 300. To prevent frequent disturbances to the control system, the hot air device 300 can be turned off when the humidity is lower than the first predetermined humidity by a certain amount. For example, when the detected humidity exceeds the first predetermined humidity (for example, 60%), turn on the hot air device 300, and turn off the hot air device 300 when the humidity drops below the second predetermined humidity (for example, 55%).

[0049] In the embodiments of the present application, when the wind turbine generator set is in a non-operating state, the adjustable air valve 400 is closed. After the unit has been shut down for a long time, closing the adjustable air valve 400 can prevent the chimney effect of the tower barrel. When a large amount of relatively humid air enters and the humidity detected by the detection unit 100 reaches a first predetermined humidity, the hot air device 300 is turned on until the relative humidity in the bottom space of the tower barrel 5 is reduced.

[0050] In some embodiments, during the operation of the unit, by adjusting the opening degree of the adjustable air valve 400 and / or turning on the hot air device 300, when the temperature in the bottom space of the tower barrel 5 is raised to a predetermined temperature range, the opening degree of the adjustable air valve 400 can be adjusted first. When the opening degree of the adjustable air valve 400 is lower than the predetermined opening degree, the hot air device 300 is then turned on.

[0051] In the embodiments of the present application, the predetermined opening degree may refer to the opening degree of the adjustable air valve 400 being zero, or 5% of the maximum opening degree, which is specifically set according to the actual situation of different wind turbine generator sets. This means that when the humidity adjustment requirement cannot be met even by adjusting the air valve opening degree to the minimum, the heater in the hot air device 300 can be considered to be turned on at this time. By preferentially controlling the air valve opening degree of the adjustable air valve 400 and then enabling the control strategy of the hot air device 300, the electric energy can be saved to the greatest extent.

[0052] The wind turbine generator set itself has the characteristic of generating heat. However, due to the change of the external wind conditions, the power and the amount of heat generated will also change. Therefore, in order to make the most of the heat generated by the unit itself and at the same time ensure anti-corrosion when the unit is operating at low power or shut down, it is necessary to adjust the operating mechanism of the anti-corrosion device according to the operating conditions of the wind turbine generator set.

[0053] When the power of the unit operation is greater than a predetermined power value, the heat generated by the unit itself makes the air temperature in the tower barrel relatively high, usually more than 10 degrees higher than the ambient temperature. The present invention finds through research that when the temperature difference between the inside of the tower barrel 5 and the outside environment rises to more than 10 degrees, the humidity of the air in the tower barrel is usually lower than 60%. Therefore, dehumidification does not need to be considered in this case. Figure 3 is a relationship diagram between the power and the temperature rise measured based on the actual operation of the wind turbine generator set according to the present application. As Figure 3 shown, when the operating power of the unit is greater than 200KW, the temperature in the tower barrel is usually more than 10 degrees higher than the ambient temperature. This means that when the operating power of the unit is greater than the predetermined power value, the heat dissipated by the unit or the electrical equipment itself has made the humidity of the air in the tower barrel higher than the critical corrosion humidity. According to the anti-corrosion system of the present invention, when controlling the humidity of the air in the tower barrel, the control unit 200 can refer to the temperature difference between indoors and outdoors to determine whether to perform dehumidification operations.

[0054] Specifically, as Figure 3 shown, according to the local minimum ambient temperature of 25°C to 35°C and an ambient relative humidity of 95%, when the power of the wind turbine generator set is above 200 KW, the temperature rise between the temperature inside the bottom space of the tower barrel 5 and the ambient temperature is above 10°C; when the wind turbine generator set is in a low-power state of 0 to 200 KW, the temperature rise between the temperature inside the bottom space of the tower barrel 5 and the ambient temperature is less than 10°C. In the case of a temperature rise of 10°C, according to the air enthalpy-humidity diagram, the relative humidity inside the tower barrel 5 can be calculated through the relative humidity measurement table inside the tower barrel during the operation of the unit in Table 1.

[0055] Table 1 Relative humidity measurement table inside the tower barrel during the operation of the unit

[0056]

[0057]

[0058] From the above analysis, it can be seen that when the power of the wind turbine generator set is above 200 KW, the temperature inside the tower barrel 5 is 10°C higher than the ambient temperature, and the relative humidity during the operation of the unit is less than the critical corrosion humidity. At this time, there is no need to start the temperature adjustment unit for treatment.

[0059] In addition, when the operating power of the unit is lower than the predetermined power value and the power changes rapidly, and the heat generation of the unit itself drops rapidly, the water vapor in the air will condense rapidly, resulting in a rapid increase in the relative humidity of the air inside the tower barrel and an electrochemical corrosion effect. Therefore, at this time, it is necessary to control the opening degrees of the hot air device 300 and / or the adjustable air valve 400 to adjust the humidity of the air inside the tower barrel. For example, when the control unit 200 monitors that the power changes rapidly (for example, during shutdown), it can control the opening degree of the adjustable air valve 400 to keep the unit at a relatively constant temperature, avoiding a large temperature drop that causes dew condensation inside the air of the wind turbine tower barrel 5, resulting in aggravated corrosion.

[0060] In some embodiments, the control unit 200 is further configured to: when the power of the wind turbine generator set does not exceed the predetermined power and / or the power change speed of the wind turbine generator set exceeds the predetermined change rate, adjust the opening degree of the adjustable air valve 400 and consider turning on the hot air device 300; when the power of the wind turbine generator set is greater than the predetermined power and the power change speed of the wind turbine generator set does not exceed the predetermined change rate, adjust the opening degree of the adjustable air valve 400 without turning on the hot air device 300.

[0061] In the embodiments of the present application, the opening degree of the adjustable air valve 400 can be adjusted through a PI controller for humidity PI closed-loop regulation. Wherein, the predetermined power can be a predetermined percentage of the rated power of the wind turbine generator set, which can be 15% of the rated power, and is specifically set according to the actual conditions of different wind turbine generator sets. The predetermined change rate can be set in combination with the actual situation, and the embodiments of the present application do not limit it.

[0062] In the embodiments of the present application, when the wind turbine generator set is in an operating state and the humidity detected by the detection unit is higher than the first predetermined humidity, although the humidity has approached or exceeded the critical corrosion humidity of the metal, when the power of the wind turbine generator set is greater than the predetermined power, the self-heating of the WTGS will cause the temperature to rise. Only the opening degree of the adjustable air valve 400 needs to be adjusted. If the power of the wind turbine generator set is less than the predetermined power, it is necessary to adjust the opening degree of the adjustable air valve 400 and use the hot air device 300 for heating to keep the unit running stably. If the power changes too fast, a condensation phenomenon will occur, resulting in corrosion. Therefore, it is also necessary to adjust the opening degree of the adjustable air valve 400 and use the hot air device 300 for heating to keep the temperature of the unit constant. If the power is greater than the predetermined value and the power change is slow, heating and dehumidification can be not considered, and only the opening degree of the adjustable air valve 400 needs to be adjusted to control the temperature inside the tower barrel.

[0063] For example, when the wind speed changes relatively fast and the heat generation of the unit itself decreases relatively fast, the operating power of the unit will drop rapidly, resulting in a condensation phenomenon in the unit, that is, the relative humidity of the air will increase rapidly and an electrochemical corrosion effect will occur. At this time, when the control unit 200 monitors that the power changes relatively fast (for example, shutdown), it can control the opening degree of the adjustable air valve 400 in advance to keep the unit at a relatively constant temperature and avoid a large drop in temperature causing dew condensation in the air inside the wind turbine tower barrel 5, resulting in aggravated corrosion.

[0064] That is to say, when the unit is shut down under normal light wind conditions, at low power, and when the power drops rapidly, the temperature difference between the inside and outside of the tower barrel 5 is usually lower than 10°C, making the relative humidity inside the tower barrel higher than 60%, or the relative humidity inside the tower barrel 5 will be higher than 60% due to the air exchange between the inside and outside through the bottom exhaust vent of the tower. At this time, it is necessary to increase the temperature of the bottom space of the tower barrel 5 and reduce the relative humidity inside the tower barrel 5.

[0065] In some embodiments, for the anti-corrosion system according to the present application, while controlling the air humidity, it is also necessary to take into account the heat dissipation requirements of electrical equipment to ensure the normal operation of the electrical equipment. Therefore, the detection unit 100 is further configured to detect the temperature of the air in the bottom space of the tower barrel 5 and determine whether the air at the current temperature can meet the heat dissipation requirements of the electrical equipment. Therefore, the control unit 200 is further configured to: when the humidity detected by the detection unit 100 is higher than the first predetermined humidity, detect the current air temperature and determine whether the current air temperature is higher than the predetermined temperature threshold to determine whether to prioritize the cooling of the electrical equipment. When the temperature of the electrical equipment exceeds the predetermined temperature threshold (for example, 80% of the temperature alarm value), the cooling requirements of the electrical equipment should be prioritized, and on the basis of meeting the cooling requirements, the air humidity is controlled. In some embodiments, when the unit is operating, the ambient temperature in the tower barrel 5 cannot be higher than the temperature threshold, for example, 55 °C.

[0066] The control unit according to the present application is further configured to: when the temperature of the air in the tower barrel detected by the detection unit 100 exceeds the predetermined temperature threshold, turn off the hot air device 300 and adjust the opening of the adjustable air valve 400, for example, adjust the opening of the adjustable air valve 400 to the maximum; when the temperature detected by the detection unit 100 is lower than the predetermined temperature threshold, adjust the opening of the adjustable air valve 400 and / or turn on the hot air device 300 to raise the temperature of the bottom space of the tower barrel 5 to within the predetermined temperature range.

[0067] Based on the above embodiments, the present application further provides a wind turbine generator set including the above anti-corrosion system. The anti-corrosion system can be installed at the bottom of the tower barrel of the wind turbine generator set. The cooling system introduces external air into the nacelle and then into the bottom of the tower barrel to cool the electrical equipment (such as the converter 1 and the reactor 3) installed at the bottom of the tower barrel. When using external cold air to cool the inside of the unit, how to reduce the humidity and salt mist in the air is the key to reducing the corrosion rate of the metal (such as electrical equipment such as the converter 1 and the reactor 3) in the tower barrel 5. And the air inlet of the above cooling system is located at the gap between the wind turbine 7 and the nacelle 6 at a height of 85-100M. Therefore, the salt concentration in the air in the bottom space of the tower barrel 5 has been greatly reduced, and the influence of salt mist can be ignored, and only how to control the relative humidity of the humid air needs to be considered.

[0068] Figure 4 Shows a schematic installation structure diagram of a hot air device according to an embodiment of the present application, in combination with Figure 1 and Figure 4, the hot air device 300 includes: a heater 310 for heating air; an air duct 320, the outlet end of the air duct 320 extends towards the converter 1 in the tower barrel 5 for conveying the heated air to the converter 1; a temperature sensor arranged at the outlet of the air duct 320 for measuring the temperature at the outlet of the air duct 320; an exhaust fan 330 communicated with the air duct 320; an anti-corrosion controller 340 for adjusting the rotation speed of the exhaust fan 330 according to a predetermined temperature range to realize the generation and conveyance of hot air. In some embodiments, the hot air device 300 and the converter 1 are installed on the same installation platform. The hot air device 300 can heat the air in the tower barrel 5, thereby reducing the relative humidity of the air and achieving the reduction of the electrochemical corrosion rate of metals.

[0069] Figure 5 and Figure 6 respectively show schematic diagrams of an adjustable air valve in different opening states in an embodiment of the present application; in combination with Figure 1 , Figure 5 and Figure 6 , in some embodiments, the adjustable air valve 400 includes: an electric actuator 410 and an electric butterfly valve 420. Among them, the electric butterfly valve 420 is arranged on the exhaust air duct 9 at the bottom of the tower barrel 5 and can adjust the ventilation area of the exhaust air duct 9, and the electric actuator 410 is used to adjust the electric butterfly valve 420 to adjust the ventilation area of the exhaust air duct 9. When the electric actuator 410 acts, the cross-sectional area of the exhaust air duct 9 changes due to the rotation of the valve core of the electric butterfly valve 420, so as to adjust the exhaust air volume of the exhaust air duct 9 by adjusting the opening degree of the adjustable air valve 400.

[0070] Figure 5 shows a schematic diagram of an adjustable air valve in the maximum opening state in an embodiment of the present application. In this case, the exhaust air duct 9 is in a fully open state, and the exhaust air volume is the largest, which is beneficial to quickly reducing the temperature in the tower barrel, but the humidity will increase accordingly; Figure 6 shows a schematic diagram of an adjustable air valve in the minimum opening state in an embodiment of the present application. In this case, the exhaust air duct 9 is in a closed state and cannot exhaust air. Therefore, the temperature in the tower barrel will increase accordingly, and the humidity will decrease accordingly. When the wind turbine generator sets stop or operate at low power and the heat generated by the unit itself is not enough to increase the air temperature and reduce the relative humidity in the tower barrel 5, the adjustable air valve 400 can be closed or the opening degree can be reduced on the premise of meeting the heat dissipation requirements of the unit, so as to increase the temperature in the tower barrel 5 and achieve the purpose of reducing the relative humidity. When the temperature in the tower barrel is relatively high and it is necessary to dissipate heat as soon as possible to meet the cooling requirements of electrical equipment, the opening degree of the adjustable air valve 400 needs to be increased. When the temperature in the tower barrel exceeds a predetermined temperature threshold, the opening degree of the adjustable air valve 400 can be adjusted to the maximum.

[0071] The wind turbine itself has the characteristic of generating heat. However, due to the change of the external wind conditions, the power and the heat generation also change. Therefore, in order to make the best use of the heat generated by the unit itself and ensure the anti-corrosion requirements of the unit during low-power operation or shutdown, it is necessary to adjust the operation mechanism of the anti-corrosion system according to the operating conditions of the wind turbine.

[0072] The process of the anti-corrosion system of the embodiment of the present application operating under various conditions of the wind turbine includes:

[0073] Condition 1: When the operating power exceeds a predetermined value, according to the temperature and relative humidity measurement table inside the tower barrel, calculate the relative humidity inside the tower barrel 5 during operation, and it can be determined that system dehumidification is not required during operation under Condition 1.

[0074] Condition 2: When the unit is in a low-power state, at this time, the temperature difference between the inside and outside of the tower barrel 5 is usually lower than 10°C, and the relative humidity is greater than the critical corrosion humidity (for example, 60%). The control unit 200 can increase the temperature inside the tower barrel 5 and reduce the relative humidity inside the tower barrel 5 by adjusting the adjustable air valve 400 and the auxiliary start hot air device 300.

[0075] Condition 3: During the shutdown process of the unit, when the natural cooling temperature of the tower barrel 5 drops rapidly, it is necessary to start the hot air device 300, control the adjustable air valve 400, and optimize the control of the tower bottom exhaust fan 4 to ensure that the relative humidity inside the tower barrel 5 is less than 60%.

[0076] Condition 4: After the unit has been shut down for a long time, close the adjustable air valve 400 to prevent the chimney effect of the tower barrel 5 and prevent a large amount of humid air from entering. At the same time, start the hot air device 300 to heat the closed environment and reduce the relative humidity.

[0077] Based on the foregoing embodiments, the embodiment of the present application further provides a wind turbine, and the wind turbine includes the above anti-corrosion system.

[0078] According to the wind turbine of the embodiment of the present application, due to the adoption of the anti-corrosion system according to the embodiment of the present application, the air-cooled wind turbine can be applied to coastal areas or areas close to salt lakes, etc., increasing the applicable area of the air-cooled wind turbine. Especially for the existing air-cooled wind turbines, due to the limitation of the installation size, it is impossible to use a rotary dehumidification device at a low cost, and the cost is about 1 / 10 of that of the rotary dehumidification.

[0079] Based on the foregoing embodiments, an embodiment of the present application further provides an anti-corrosion method for preventing metal corrosion in the tower barrel of a wind turbine generator set. An embodiment of the present application provides an anti-corrosion method, and the method is applied to an anti-corrosion system. The method provided in this embodiment can be implemented by a computer program. When the computer program is executed, each step in the method provided in this embodiment is completed. In some embodiments, the computer program can be executed by a processor in the anti-corrosion system.

[0080] The anti-corrosion method according to the present application may include the following steps: obtaining the humidity of the air in the bottom space of the tower barrel; adjusting the temperature of the air in the tower barrel to a predetermined temperature range according to the detected humidity, so that when the temperature of the bottom space of the tower barrel remains within the predetermined temperature range, the humidity of the bottom space of the tower barrel is lower than the critical corrosion humidity of the metal.

[0081] According to the anti-corrosion method of the present application, when using the anti-corrosion system of the embodiment of the present application to perform anti-corrosion control on a wind turbine generator set, first judge the operating state of the wind turbine generator set (WTGS). If the wind turbine generator set is in an operating state, the relative humidity in the bottom space of the tower barrel 5 is detected by the detection unit 100, and it is judged whether the relative humidity exceeds the critical corrosion humidity of the metal (for example, relative humidity 60%). If it does not exceed, no treatment is required. If the relative humidity exceeds the critical corrosion humidity of the metal, it is further judged whether the power of the wind turbine generator set is greater than a predetermined power (for example, 15% of the rated power) and whether the power change is very slow. If the power of the wind turbine generator set is greater than the predetermined power and the power change is very slow, the problem of excessive relative humidity can be solved by the heat generated by the tower barrel 5 itself plus adjusting the opening degree of the adjustable air valve 400. In this case, it is only necessary that the temperature in the tower barrel 5 of the wind turbine generator set detected by the detection unit 100 does not exceed the limit (for example, does not exceed 80% of the temperature alarm value); if the power of the wind turbine generator set is less than the predetermined power or the power change is very fast (for example, during the shutdown process), under the condition of meeting the heat dissipation requirements of the unit (the temperature in the tower barrel 5 of the wind turbine generator set does not exceed 80% of the temperature alarm value), the opening degree of the adjustable air valve 400 can be first adjusted to be smaller. When the opening degree of the adjustable air valve 400 is lower than 5% of the maximum opening degree, the heater 310 of the hot air device 300 is then turned on for heating.

[0082] During the above anti-corrosion control process, if the temperature in the tower barrel 5 of the wind turbine generator set is greater than 80% of the temperature alarm value and does not meet the heat dissipation requirements of the unit, the hot air device 300 should be turned off, and the heat dissipation problem of the unit should be solved first to avoid faults of the wind turbine generator set.

[0083] If the wind turbine generator set is in a long-term non-operating state, close the adjustable air valve 400 to prevent the chimney effect of the tower barrel 5 and prevent a large amount of relatively humid air from entering. And when the relative humidity in the bottom space of the tower barrel 5 exceeds the first predetermined humidity (for example, the critical corrosion humidity of metal is 60%), start the hot air device 300 until the relative humidity in the bottom space of the tower barrel 5 is less than the second predetermined humidity (for example, the relative humidity is 55%), and then close the hot air device 300.

[0084] According to the anti-corrosion system of the embodiment of the present application, the detection unit 100 is provided to obtain the humidity of the air, and the control unit 200 controls the temperature adjustment unit according to the humidity detected by the detection unit 100, so that the temperature in the bottom space of the tower barrel 5 is maintained within a predetermined temperature range, thereby making the humidity in the bottom space of the tower barrel 5 lower than the critical corrosion humidity of the metal to reduce the corrosion of the metal. Compared with a rotary dehumidifier or a compressor dehumidifier, there is no need to additionally set up equipment such as a rotary dehumidifier or a compressor dehumidifier. Compared with the existing wind turbine generator sets using air cooling, it is more suitable for coastal areas or areas near salt lakes with high humidity and high salt mist, and has a better anti-corrosion effect.

[0085] Figure 7 An exemplary flow of an anti-corrosion method according to an embodiment of the present application is shown.

[0086] First, in step S100, it is judged whether the WGTS is operating; in the embodiment of the present application, if the WGTS is operating, step S210 is executed, and if the WGTS is not operating, step S120 is executed.

[0087] Steps S120 - S160 show the operating steps of how to adjust the air humidity in the tower barrel when the unit is not operating. Specifically, in step S120, according to the judgment result of step S100 that the unit is not operating, close the air valve. In step S130, it is judged whether the relative humidity is greater than the first predetermined humidity, for example, 60%. In the embodiment of the present application, when the relative humidity is greater than 60%, step S140 is executed, and when the relative humidity is less than 60%, return to step S120. In step S140, start the heater to heat the air so as to reduce the relative humidity of the air. In step S150, it is judged whether the relative humidity is less than the second predetermined humidity, for example, 55%. In the embodiment of the present application, when the relative humidity is less than 55%, step S160 is executed. When the relative humidity is greater than 55%, continue to execute step S140. In step S160, close the heater. After step S160 is executed, continue to execute step S100.

[0088] Steps S210 - S240, steps S310 - S340, and step S410 illustrate the specific operations of controlling the humidity and temperature of the air inside the tower when the unit is operating. In step S210, it is judged whether the relative humidity continuously exceeds 60%. For example, within 30 minutes, the humidity continuously exceeds 60%. According to the judgment result of step S210, if the relative humidity continuously exceeds 60%, then step S220 is executed. If the relative humidity continuously is less than or equal to 60%, then step S410 is executed.

[0089] In step S220, it is judged whether the operating power of the unit is greater than the predetermined power and whether the power change is less than the predetermined change rate. In the embodiments of the present application, the predetermined power may be 15% of the rated power. If the power is greater than 15% of the rated power and the power change is slow, then step S230 is executed. If the power is less than 15% of the rated power, or the power change is fast, then step S310 is executed.

[0090] In step S230, it is judged whether the temperature of the air inside the tower is lower than the predetermined temperature threshold (for example, 80% of the temperature alarm value). In the embodiments of the present application, when the air temperature at the bottom of the tower is lower than the predetermined temperature threshold, then step S240 is executed. When the tower temperature is higher than the predetermined temperature threshold, then step S410 is executed.

[0091] In step S240, the humidity PI closed - loop regulates the exhaust valve and prohibits the heater from being turned on. Since the operating power of the unit is high, the temperature inside the tower is high at this time, and the humidity is usually greater than the critical corrosion humidity. Therefore, in this step, the opening of the adjustable valve 400 is regulated by the PI controller to adjust the humidity of the air inside the tower. The heater is prohibited from being turned on to meet the heat dissipation requirements of the unit and ensure the normal operation of the unit. After step S240 is executed, step S100 is continued.

[0092] In step S310, it is judged whether the tower temperature is lower than the predetermined temperature threshold, for example, 80% of the temperature alarm value. When the temperature inside the tower is lower than 80% of the alarm value, step S320 is executed. When the temperature inside the tower is higher than 80% of the alarm value, step S410 is executed.

[0093] In step S320, the humidity PI closed - loop regulates the opening of the exhaust valve. In this case, the humidity is preferentially regulated by adjusting the opening of the adjustable valve 400.

[0094] In step S330, it is judged whether the opening of the exhaust valve is lower than the predetermined opening, for example, 5% of the maximum opening of the adjustable valve 400. In the embodiments of the present application, when the opening is lower than 5%, step S340 is executed to start the heater to heat the air to reduce the humidity. When the opening is higher than 5%, return to execute step S320.

[0095] After step S340 is executed, step S100 is executed. That is to say, when the heater is started, return to step S100 to continuously detect whether the relative humidity is greater than 60%.

[0096] In step S410, since the relative humidity is less than 60% and the temperature inside the tower barrel is lower than the predetermined temperature threshold, in this case, the heater can be turned off, and the PI closed-loop control of temperature or humidity can be performed only by controlling the opening degree of the adjustable air valve 400.

[0097] Based on the foregoing embodiments, an anti-corrosion device is provided in an embodiment of the present application. Each module included in the device and each unit included in each module can be implemented by a processor in a computer device; of course, it can also be implemented by specific logic circuits; during implementation, the processor can be a central processing unit (CPU, Central Processing Unit), a microprocessor (MPU, Microprocessor Unit), a digital signal processor (DSP, Digital Signal Processing), or a field programmable gate array (FPGA, Field Programmable Gate Array), etc.

[0098] It should be noted that in the embodiments of the present application, if the above anti-corrosion method is implemented in the form of software function modules and sold or used as an independent product, it can also be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the embodiments of the present application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the methods described in the various embodiments of the present application. The foregoing storage medium includes: various media such as a USB flash drive, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a magnetic disk, or an optical disc that can store program codes. In this way, the embodiments of the present application are not limited to any specific combination of hardware and software.

[0099] Correspondingly, an embodiment of the present application provides a computer storage medium, on which a computer program is stored, and is characterized in that when the computer program is executed by a processor, the steps of the anti-corrosion method provided in the above embodiments are implemented.

[0100] According to another aspect of the present application, a computer program is also provided, and when the computer program is executed by a processor, the above anti-corrosion method is implemented.

[0101] According to another aspect of the present application, a computer device is further provided. The computer device includes: a processor; and a memory storing a computer program, which when executed by the processor, implements the above anti-corrosion method.

[0102] It should be noted here that the descriptions of the above storage medium and device embodiments are similar to those of the above method embodiments and have similar beneficial effects to the method embodiments. For the technical details not disclosed in the storage medium and device embodiments of the present application, please refer to the descriptions of the method embodiments of the present application for understanding.

[0103] It should be understood that the "one embodiment" or "an embodiment" mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, the "in one embodiment" or "in an embodiment" that appears throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. It should be understood that in various embodiments of the present application, the sequence numbers of the above processes do not mean the order of execution is prior or posterior. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present application. The sequence numbers of the embodiments of the present application are only for description and do not represent the advantages or disadvantages of the embodiments.

[0104] It should be noted that in this article, the term "comprising", "including" or any other variant thereof is intended to cover a non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, the element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the element.

[0105] In several embodiments provided by the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are only illustrative. For example, the division of the units is only a logical function division, and there can be other division methods in actual implementation. For example, multiple units or components can be combined, or can be integrated into another system, or some features can be ignored, or not executed. In addition, the coupling, direct coupling or communication connection between the components shown or discussed with each other can be through some interfaces. The indirect coupling or communication connection of the devices or units can be electrical, mechanical or other forms.

[0106] The units described above as separate components may or may not be physically separated, and the components shown as units may or may not be physical units; they may be located in one place or distributed across multiple network units; some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0107] In addition, in each embodiment of the present application, all the functional units may be integrated into one processing unit, or each unit may be a separate unit alone, or two or more units may be integrated into one unit; the above-mentioned integrated units may be implemented in the form of hardware or in the form of a combination of hardware and software functional units.

[0108] Those of ordinary skill in the art can understand that all or part of the steps of implementing the above method embodiments can be completed by hardware related to program instructions. The foregoing program can be stored in a computer-readable storage medium. When the program is executed, it performs the steps including the above method embodiments; and the foregoing storage medium includes: removable storage devices, read-only memories (ROMs), magnetic disks, or optical discs, etc., which can store program codes.

[0109] Alternatively, if the above-mentioned integrated units of the present application are implemented in the form of software functional modules and sold or used as independent products, they can also be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiments of the present application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to enable a controller to execute all or part of the methods described in the various embodiments of the present application. And the foregoing storage medium includes: removable storage devices, ROMs, magnetic disks, or optical discs, etc., which can store program codes.

[0110] The above is only the implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, which should all be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claimed rights.

Claims

1. An anti-corrosion system for preventing metal corrosion inside the tower barrel of a wind turbine generator, characterized in that, The anti-corrosion system includes: A detection unit for obtaining the temperature and humidity of the air inside the tower barrel; A temperature adjustment unit for adjusting the temperature of the air inside the tower barrel. The temperature adjustment unit includes a hot air device and an adjustable air valve. The hot air device is used to heat the air inside the tower barrel, and the adjustable air valve is used to be arranged at the air outlet at the bottom of the tower barrel to adjust the air discharge volume at the air outlet; A control unit for controlling the start and stop of the hot air device and the opening degree of the adjustable air valve according to the temperature and humidity detected by the detection unit, so as to adjust the temperature of the air inside the tower barrel to a predetermined temperature range. When the temperature of the air inside the tower barrel remains within the predetermined temperature range, the humidity of the air inside the tower barrel is lower than the critical corrosion humidity of the metal; Wherein, the control unit is configured as: When the wind turbine is in an operating state, when the humidity detected by the detection unit is higher than a first predetermined humidity and the detected temperature does not exceed a temperature threshold, when the power of the wind turbine does not exceed a predetermined power and / or the power change rate of the wind turbine exceeds a predetermined change rate, adjust the opening degree of the adjustable air valve and turn on the hot air device.

2. The anti-corrosion system according to claim 1, characterized in that, The control unit is configured as: When the wind turbine is in an operating state and the humidity detected by the detection unit is not higher than the first predetermined humidity, turn off the hot air device and adjust the temperature of the air inside the tower barrel by adjusting the opening degree of the adjustable air valve; Wherein, the first predetermined humidity is less than or equal to the critical corrosion humidity of the metal.

3. The anti-corrosion system according to claim 1, characterized in that, When the wind turbine is in a non-operating state, the control unit is configured as: Close the adjustable air valve, and when the humidity detected by the detection unit is higher than the first predetermined humidity, turn on the hot air device, and when the humidity drops to not higher than a second predetermined humidity, turn off the hot air device.

4. The anti-corrosion system according to claim 1, characterized in that, In the step of adjusting the opening degree of the adjustable air valve and turning on the hot air device, Adjust the opening degree of the adjustable air valve. When the opening degree of the adjustable air valve is lower than a predetermined opening degree, then turn on the hot air device so that the temperature of the air inside the tower barrel rises to within the predetermined temperature range.

5. The anti-corrosion system according to claim 1, characterized in that, When the humidity detected by the detection unit is higher than the first predetermined humidity, When the power of the wind turbine is greater than a predetermined power and the power change rate of the wind turbine does not exceed a predetermined change rate, adjust the opening degree of the adjustable air valve without turning on the hot air device so that the temperature of the space at the bottom of the tower barrel rises to within the predetermined temperature range.

6. The anti-corrosion system according to any one of claims 2, 4 and 5, characterized in that, The control unit is further configured as: when the humidity detected by the detection unit is higher than the first predetermined humidity and the temperature detected by the detection unit exceeds the temperature threshold, turn off the hot air device and adjust the opening degree of the adjustable air valve; When the temperature detected by the detection unit is lower than the temperature threshold, adjust the opening degree of the adjustable air valve and / or turn on the hot air device so that the temperature of the air in the tower barrel rises to the predetermined temperature range.

7. The anti-corrosion system according to claim 1, characterized in that, The hot air device includes: A heater for heating air; An air duct, the outlet end of which extends towards the converter in the tower barrel, for conveying the heated air to the converter; A temperature sensor arranged at the outlet of the air duct for measuring the temperature at the outlet of the air duct; An exhaust fan communicated with the air duct; An anti-corrosion controller for adjusting the rotation speed of the exhaust fan and / or the opening degree of the adjustable air valve according to the predetermined temperature range.

8. The anti-corrosion system according to claim 7, characterized in that, The hot air device and the converter are installed on the same installation platform.

9. A wind turbine generator, characterized in that, The wind turbine generator set includes the anti-corrosion system according to any one of claims 1 to 8.

10. An anti-corrosion method for preventing metal corrosion inside the tower barrel of a wind turbine generator, characterized in that, The anti-corrosion method includes: Obtain the temperature and humidity of the air in the tower barrel, the power of the wind turbine generator set, and the power change speed of the wind turbine generator set under the operating state of the wind turbine generator set; When the detected humidity is higher than the first predetermined humidity and the detected temperature is lower than the temperature threshold, and when the power of the wind turbine generator set does not exceed the predetermined power and / or the power change speed of the wind turbine generator set exceeds the predetermined change rate, adjust the exhaust air volume of the exhaust outlet arranged on the tower barrel and heat the air in the tower barrel to adjust the temperature of the air in the tower barrel to the predetermined temperature range. When the temperature of the air in the tower barrel remains within the predetermined temperature range, the humidity of the air in the tower barrel is lower than the critical corrosion humidity of the metal.

11. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, the anti-corrosion method according to claim 10 is implemented.

12. A computer device, characterized in that, The computer device includes: A processor; and A memory storing a computer program, which when executed by the processor, implements the anti-corrosion method according to claim 10.

Images