Intelligent dehumidification system for box transformer substation of wind turbine generator

Abstract

The invention provides an intelligent dehumidification system for a box transformer substation of a wind turbine generator. Comprising an environmental data acquisition module for acquiring environmental data of a box transformer substation, a dehumidification power calculation module for calculating the power of a dehumidifier according to the environmental data and the generated power of a wind turbine generator, and an intelligent control module for controlling the running state of the dehumidifier according to the power of the dehumidifier, the box transformer substation abnormity monitoring module and the dehumidifier are used for carrying out risk early warning according to the environment data; the environment data acquisition module is respectively connected with the dehumidification power calculation module and the box transformer substation abnormity monitoring module, the box transformer substation abnormity monitoring module is connected with the intelligent control module, and the intelligent control module is connected with the dehumidifier. The system dynamically adjusts the power of the dehumidifier according to the power generation power of the wind turbine generator and real-time environment data, and monitors the smoke concentration and the box transformer substation image in real time, so that the dehumidification working efficiency is improved and the energy consumption is reduced on the premise of ensuring the dehumidification effect, and potential safety hazards can be found in time and early warned.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent dehumidification, and particularly to an intelligent dehumidification system for the box-type transformer of a wind turbine generator set. Background Art

[0002] In the wind power industry, as one of the key equipment, the temperature and humidity conditions of the operating environment of the box-type transformer of a wind turbine generator set are crucial for the safe and stable operation of the equipment. However, traditional dehumidification methods for box-type transformers often rely on manual regular inspections and manual control of dehumidification equipment. This method is not only inefficient but also difficult to ensure the continuous stability of the internal environment of the box-type transformer.

[0003] There are still some deficiencies in the existing dehumidification technologies for box-type transformers. For example, some systems lack comprehensive collection and analysis of environmental data, resulting in unsatisfactory dehumidification effects or high energy consumption. At the same time, some systems have limitations in abnormal monitoring and cannot detect and handle potential fault points in a timely manner, thus increasing the safety risks of the operation of wind turbine generator sets. Therefore, it is very necessary to design an intelligent dehumidification system for the box-type transformer of a wind turbine generator set. Summary of the Invention

[0004] The purpose of the present invention is to provide an intelligent dehumidification system for the box-type transformer of a wind turbine generator set, which can improve the working efficiency of the dehumidification system and reduce energy consumption by collecting environmental data, dynamically adjusting the dehumidification power, and real-time monitoring abnormal situations.

[0005] To achieve the above purpose, the present invention provides the following solutions:

[0006] An intelligent dehumidification system for the box-type transformer of a wind turbine generator set includes: an environmental data collection module, a dehumidification power calculation module, an intelligent control module, a box-type transformer abnormal monitoring module, and a dehumidifier; the environmental data collection module is respectively connected to the dehumidification power calculation module and the box-type transformer abnormal monitoring module, the box-type transformer abnormal monitoring module is connected to the intelligent control module, and the intelligent control module is connected to the dehumidifier;

[0007] The environmental data collection module is used to collect the environmental data of the box-type transformer; the dehumidification power calculation module is used to calculate the power of the dehumidifier according to the environmental data and the power generation power of the wind turbine generator set; the intelligent control module is used to control the operating state of the dehumidifier according to the power of the dehumidifier; the box-type transformer abnormal monitoring module is used to perform risk early warning according to the environmental data.

[0008] Optionally, the environmental data collection module includes: a temperature and humidity sensor, a smoke sensor, a dew point detector, and an image acquisition device; the environmental data includes: environmental temperature, environmental humidity, smoke concentration, and real-time images of the box-type transformer.

[0009] Optionally, the specific steps for calculating the dehumidifier power based on the environmental data and the power generation of the wind turbine are as follows: Look up the heat dissipation obtained from the power generation of the wind turbine in the preset database, calculate the dew point of the transformer substation based on the Magnus-Tetens formula and combined with the environmental data, and calculate the dehumidifier power based on the dew point of the transformer substation.

[0010] Optionally, the calculation formula for the dehumidifier power is: Where W is the dehumidifier power, T is the time, P(t) is the power generation of the wind turbine, T(t) is the environmental temperature, H(t) is the environmental humidity, and α, β, and γ are the adjustment coefficients of the power generation of the wind turbine, environmental temperature, and environmental humidity, respectively.

[0011] Optionally, the specific steps for controlling the operating state of the dehumidifier according to the dehumidifier power include:

[0012] When the dehumidifier power is greater than the preset threshold, start the dehumidifier;

[0013] When the dehumidifier power is less than the preset threshold, turn off the dehumidifier;

[0014] When the power generation of the wind turbine is greater than the power generation demarcation threshold and the heat dissipation is greater than the heat dissipation threshold, set the dehumidifier to the strong mode;

[0015] When the power generation of the wind turbine is less than the power generation demarcation threshold and the heat dissipation is less than the heat dissipation threshold, set the dehumidifier to the energy-saving mode.

[0016] Optionally, the specific steps for risk warning based on the environmental data include:

[0017] When the smoke concentration is greater than the concentration threshold, send a smoke abnormality warning signal;

[0018] When a preset fault point appears in the real-time image of the transformer substation, send a fault point abnormality warning signal.

[0019] According to the specific embodiments provided by the present invention, the following technical effects are disclosed: The intelligent dehumidification system for the wind turbine box transformer of the present invention includes: an environmental data acquisition module for collecting the environmental data of the box transformer, a dehumidification power calculation module for calculating the dehumidifier power according to the environmental data and the power generation power of the wind turbine, an intelligent control module for controlling the operating state of the dehumidifier according to the dehumidifier power, a box transformer anomaly monitoring module for performing risk warning according to the environmental data, and a dehumidifier; the environmental data acquisition module is respectively connected to the dehumidification power calculation module and the box transformer anomaly monitoring module, the box transformer anomaly monitoring module is connected to the intelligent control module, and the intelligent control module is connected to the dehumidifier. This system dynamically adjusts the dehumidifier power according to the power generation power of the wind turbine and the real-time environmental data, and also monitors the smoke concentration and the box transformer image in real time. On the premise of ensuring the dehumidification effect, it not only improves the dehumidification work efficiency but also reduces the energy consumption, and can timely discover and give early warnings of potential safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 It is a structural diagram of the intelligent dehumidification system for the wind turbine box transformer of the present invention.

[0022] Reference numerals: 1, environmental data acquisition module; 2, dehumidification power calculation module; 3, intelligent control module; 4, box transformer anomaly monitoring module; 5, dehumidifier. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0024] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0025] Such as Figure 1As shown in the figure, the present invention provides an intelligent dehumidification system for a box-type transformer of a wind turbine, comprising: an environmental data acquisition module 1, a dehumidification power calculation module 2, an intelligent control module 3, a box-type transformer abnormal monitoring module 4, and a dehumidifier 5; the environmental data acquisition module 1 is respectively connected to the dehumidification power calculation module 2 and the box-type transformer abnormal monitoring module 4, the box-type transformer abnormal monitoring module 4 is connected to the intelligent control module 3, and the intelligent control module 3 is connected to the dehumidifier 5;

[0026] The environmental data acquisition module 1 is used to acquire the environmental data of the box-type transformer; the dehumidification power calculation module 2 is used to calculate the dehumidifier power according to the environmental data and the power generation power of the wind turbine; the intelligent control module 3 is used to control the operating state of the dehumidifier 5 according to the dehumidifier power; the box-type transformer abnormal monitoring module 4 is used to perform risk early warning according to the environmental data.

[0027] Specifically, the environmental data acquisition module 1 includes: a temperature and humidity sensor, a smoke sensor, a dew point detector, and an image acquisition device; the environmental data includes: environmental temperature, environmental humidity, smoke concentration, and real-time image of the box-type transformer.

[0028] In some embodiments, a temperature and humidity sensor is installed at the top corner of the box-type transformer. Since hot air rises, the temperature at the top is relatively high, and there is a layered difference in humidity. Installing it here can effectively monitor the temperature and humidity conditions in the top space of the box-type transformer; a temperature and humidity sensor is installed at the position of the incoming cable at the bottom of the box-type transformer. Since the cable generates heat during operation and the bottom is relatively more susceptible to moisture, the sensor at this position can monitor the temperature and humidity near the cable and prevent the normal operation of the cable from being affected by abnormal temperature and humidity. Uniformly arranging the temperature and humidity sensors at different positions in the box-type transformer can more accurately collect the temperature value and humidity value of the box-type transformer environment, providing an accurate data basis for the calculation of the dew point of the box-type transformer and the calculation of the dehumidifier power.

[0029] In some embodiments, the smoke sensor is installed near the source where smoke may be generated and in an area with relatively stable air circulation, such as: above the transformer and near the ventilation opening of the box-type transformer; internal faults in the transformer may cause smoking or even fire, and the smoke signal can be quickly captured at the upper position above it. At the same time, the ventilation opening is a channel for air exchange. If smoke is generated, it can be detected through the air flow of the ventilation opening, avoiding the problem that smoke accumulates locally due to air circulation and is not detected in time.

[0030] In some embodiments, dew point detectors are installed at the edge of the doors and windows of the box-type transformer and near the surfaces of some metal components that are prone to condensate (such as the bottom of the bus duct bridge). The edge of the doors and windows is a place where the box-type transformer is in close contact with the external environment, with large temperature differences and prone to condensation. By detecting the dew point here, the risk of condensation can be early warned.

[0031] In some embodiments, image acquisition devices are installed at high positions above the diagonal of the box-type substation and in front of some key equipment (such as the front of the high-voltage switchgear). The image acquisition device above the diagonal at a high position can achieve a non-blind-zone monitoring of most areas inside the box-type substation, and can clearly observe the operating status of electrical equipment, cable connection conditions, etc.; the image acquisition device of the high-voltage switchgear is specifically used to closely and more clearly monitor details such as the opening and closing status of the switchgear and the indicator light display, so as to timely detect abnormal conditions of the equipment.

[0032] Specifically, the specific steps for calculating the dehumidifier power according to the environmental data and the power generation power of the wind turbine are as follows: Obtain the power generation power of the wind turbine, and find the corresponding heat dissipation in the preset database according to the power generation power of the wind turbine, which represents the heat generated during the operation of the wind turbine. Calculate the dew point of the box-type substation based on the Magnus-Tetens formula in combination with the environmental temperature and environmental humidity, and calculate the dehumidifier power according to the dew point of the box-type substation.

[0033] It should be noted that the calculated dehumidifier power ensures that the dehumidifier 5 can effectively remove the excess moisture inside the box-type substation while maintaining appropriate temperature and humidity conditions inside the box-type substation.

[0034] Furthermore, the calculation formula for the dehumidifier power is:

[0035]

[0036] Wherein, W is the dehumidifier power, representing the power when the dehumidifier 5 is working, T is the time, indicating that the dehumidifier power is calculated by accumulating the influence of various factors over the entire time period, P(t) is the power generation power of the wind turbine, T(t) is the environmental temperature, H(t) is the environmental humidity, and α, β, and γ are the adjustment coefficients of the power generation power of the wind turbine, environmental temperature, and environmental humidity respectively, which are used to adjust the influence degree of each factor in the dehumidifier power calculation according to the actual situation. In this embodiment, no specific limitation is made on them.

[0037] It should be noted that through the real-time adjustment of the dehumidifier power calculation by the adjustment coefficient, the calculation process of the dehumidifier power can adapt to different working environments, improving the practicability of the intelligent dehumidification control system. By comprehensively considering the power generation power of the wind turbine, the temperature value inside the box-type substation environment, the air humidity value inside the box-type substation environment, and the corresponding adjustment coefficients, the accurate calculation and dynamic adjustment of the dehumidifier power are realized, improving the operation efficiency and dehumidification effect of the dehumidifier 5, and reducing energy consumption and operation costs, with expandability and flexibility that can be flexibly adjusted according to the actual situation.

[0038] Specifically, the intelligent control module 3 is communicatively connected to the dehumidification power calculation module 2 and the dehumidifier 5 respectively. It is responsible for receiving the calculation result of the dehumidification power calculation module 2 and controlling the working state of the dehumidifier 5 according to the calculation result in the following ways:

[0039] When the power of the dehumidifier is greater than the preset threshold, it indicates that dehumidification is required inside the box-type substation, and the dehumidifier 5 is started;

[0040] When the power of the dehumidifier is less than the preset threshold, the dehumidifier 5 is turned off to save energy;

[0041] When the power generation of the wind turbine is greater than the power generation demarcation threshold and the heat dissipation is greater than the heat dissipation threshold, the dehumidifier 5 is set to the strong mode to ensure the dryness inside the box-type substation;

[0042] When the power generation of the wind turbine is less than the power generation demarcation threshold and the heat dissipation is less than the heat dissipation threshold, the dehumidifier 5 is set to the energy-saving mode.

[0043] Furthermore, the control method also includes: under the conditions of high humidity and suitable temperature for condensation, extending the operation time of the dehumidifier 5 to ensure the dryness inside the box-type substation; under the conditions of low humidity or high temperature, shortening the operation time of the dehumidifier 5.

[0044] Specifically, the specific steps for risk warning according to environmental data include:

[0045] When the smoke concentration is greater than the concentration threshold, a smoke abnormality warning signal is sent; in some embodiments, the concentration threshold is 5 ppm;

[0046] When a preset fault point appears in the real-time image of the box-type substation, a fault point abnormality warning signal is sent.

[0047] More specifically, the specific implementation process of fault point detection is as follows: According to the target detection algorithm in the box-type substation abnormality monitoring module 4, monitor the open fire situation in the image and extract the key features of the image, such as color features (under normal circumstances, the color of electrical equipment is relatively stable, and if there is abnormal heating or combustion, the color will change), texture features (the texture on the surface of the equipment can reflect its operating state, such as aging, damage, etc.), and shape features (the normal shape of the equipment is fixed, and if there is deformation, there may be abnormalities). Then compare the extracted features with the pre-stored normal image feature template. When the similarity between the two is lower than 80%, it is determined that a fault point appears in the image.

[0048] In some embodiments, considering the influence of environmental factors (such as the difference in ambient air quality in different seasons and different geographical locations) and the operating status of the box-type substation (such as full-load operation, light-load operation, etc.) on the smoke concentration, a dynamic threshold adjustment strategy is adopted. According to factors such as historical smoke concentration data, ambient temperature and humidity data, and the power generation power of the box-type substation over a period of time, the current concentration threshold is dynamically adjusted. For example, in areas or seasons with poor ambient air quality, the threshold is appropriately increased; when the box-type substation is operating at full load, since equipment heating may cause slight smoke generation, the threshold is also increased accordingly.

[0049] Further, in order to reduce the influence of sensor measurement errors and environmental interference on the data, the collected smoke concentration data is first smoothed, and then the average value of the smoke concentration in a recent period of time (such as 10 minutes) is calculated as the effective data at the current moment. Then, by calculating the change rate of the smoke concentration in adjacent time periods, it is judged whether the smoke concentration is showing an upward, downward or stable trend. If the smoke concentration continues to rise in multiple consecutive time periods and the increase amplitude exceeds a certain proportion (such as 10%), even if the current concentration does not reach the concentration threshold, it is determined as a potential anomaly and a smoke anomaly warning signal is issued in advance.

[0050] In some embodiments, an industrial switch is also provided for data transmission and exchange to ensure smooth communication between each module.

[0051] The beneficial effects of the present invention are as follows:

[0052] 1) By integrating a variety of sensors and intelligent control algorithms, comprehensive monitoring and intelligent control of the box-type substation environment are achieved;

[0053] 2) The power of the dehumidifier is dynamically adjusted according to the power generation power of the wind turbine and real-time environmental data, which not only ensures the dehumidification effect but also reduces energy consumption;

[0054] 3) By real-time monitoring of the smoke concentration and the image of the box-type substation, potential safety hazards can be discovered and warned in time, providing a strong guarantee for the efficient and safe operation of the box-type substation of the wind turbine.

[0055] In this specification, each embodiment is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. For the same or similar parts among the embodiments, reference can be made to each other.

[0056] Specific examples are applied in the present invention to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, based on the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. An intelligent dehumidification system for wind turbine box transformer, characterized in that: include: Environmental data acquisition module, dehumidification power calculation module, intelligent control module, transformer abnormality monitoring module and dehumidifier; The environmental data acquisition module is connected to the dehumidification power calculation module and the box transformer abnormality monitoring module respectively, the box transformer abnormality monitoring module is connected to the intelligent control module, and the intelligent control module is connected to the dehumidifier; The environmental data acquisition module is used to collect the environmental data of the box transformer; the dehumidification power calculation module is used to calculate the dehumidifier power based on the environmental data and the power generation power of the wind turbine; the intelligent control module is used to control the operating state of the dehumidifier according to the dehumidifier power; the box transformer abnormality monitoring module is used to issue risk warnings based on the environmental data.

2. The wind turbine box transformer intelligent dehumidification system according to claim 1 is characterized in that: The environmental data acquisition module includes: temperature and humidity sensors, smoke sensors, dew point detectors and image acquisition equipment; the environmental data includes: environmental temperature, environmental humidity, smoke concentration and real-time images of the box transformer.

3. The intelligent dehumidification system for wind turbine box transformer according to claim 1 is characterized in that: The specific steps for calculating the dehumidifier power according to the environmental data and the power generation power of the wind turbine set are: according to the power generation power of the wind turbine set, the heat dissipation is obtained by searching in a preset database, the dew point of the transformer is calculated based on the Magnus-Tetens formula and combined with the environmental data, and the dehumidifier power is calculated according to the dew point of the transformer.

4. The intelligent dehumidification system for wind turbine box transformer according to claim 1 is characterized in that: The calculation formula of the dehumidifier power is: Where W is the dehumidifier power, T is time, P(t) is the wind turbine power, T(t) is the ambient temperature, H(t) is the ambient humidity, and α, β and γ are the adjustment coefficients of wind turbine power, ambient temperature and ambient humidity, respectively.

5. The wind turbine box transformer intelligent dehumidification system according to claim 1 is characterized in that: The specific steps of controlling the operating state of the dehumidifier according to the dehumidifier power include: If the power of the dehumidifier is greater than a preset threshold, starting the dehumidifier; If the dehumidifier power is less than the preset threshold, shut down the dehumidifier; If the power generation of the wind turbine is greater than the power generation threshold and the heat dissipation is greater than the heat dissipation threshold, setting the dehumidifier to a strong mode; If the power generation of the wind turbine set is less than the power generation boundary threshold and the heat dissipation is less than the heat dissipation threshold, the dehumidifier is set to energy-saving mode.

6. The intelligent dehumidification system for wind turbine box transformer according to claim 1 is characterized in that: The specific steps of conducting risk warning based on the environmental data include: When the smoke concentration is greater than a concentration threshold, sending a smoke abnormality warning signal; When a preset fault point appears in the real-time image of the box-type transformer, an abnormal warning signal of the fault point is sent.

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