Intelligent moisture-proof box of transformer tap switch gear box

Abstract

The invention discloses an intelligent moisture-proof box for a transformer tap switch gear box, relates to the technical field of transformer operation and maintenance, and aims to improve maintenance efficiency, reduce risks and guarantee normal operation of a transformer. According to the intelligent moisture-proof box, the internal environment is monitored and adjusted in real time through the temperature and humidity sensor and the dehumidification device, and the moisture-proof effect is remarkably improved. And an intelligent humidity control module is arranged, and the working intensity of the dehumidification equipment is dynamically adjusted by adopting a PID control algorithm so as to maintain the humidity within a set threshold range. Meanwhile, a built-in data analysis and trend prediction module analyzes temperature and humidity data based on a time sequence, predicts a humidity change trend by using a linear regression model, and warns a possible humidity over-limit risk in advance. The intelligent moisture-proof box for the tap switch gear box of the transformer not only can reduce manual maintenance frequency and cost, but also can remarkably improve safety and stability of the transformer, and provides powerful guarantee for continuous operation of power equipment.

Description

Technical Field

[0001] The invention relates to the technical field of transformer operation and maintenance, and in particular to an intelligent moisture-proof box for a transformer tap switch gear box. Background Art

[0002] In the scope of China Southern Power Grid, the gear boxes of transformer tap changers produced by ABB have suffered from multiple corrosion defects. This corrosion caused the tap changer to be unable to effectively adjust the gear or switch in place, thus affecting the safe operation of the transformer. Further analysis found that the gear box of the tap changer may have the hidden danger of seal failure, which will cause jamming during the switching process, thereby increasing the risk of transformer failure. The emergence of these problems not only threatens the normal operation of the transformer, but also poses a hidden danger to the stability of the power grid.

[0003] At present, the solution to the rust defects inside the gear box of the transformer tap changer is to install a rain cover. The existing rain cover is mainly made of stainless steel and has a single function. Its main purpose is to prevent rainwater from entering key components, thereby avoiding damage to components due to moisture. However, this rain cover cannot monitor the actual moisture condition inside the gear box in real time, nor can it guarantee long-term safe operation in a high humidity environment.

[0004] The rain cover currently used can only provide preliminary protection from rainwater, but there is no effective method for monitoring and removing internal moisture. This means that maintenance work can only rely on regular inspections and maintenance by maintenance personnel, which is inefficient and results in high maintenance costs. What is more serious is that the internal moisture problem cannot be discovered and handled in a timely manner, leaving the transformer with potential failure risks, further affecting its stability and safety.

[0005] Therefore, a novel solution is urgently needed to improve maintenance efficiency, reduce risks, and ensure the normal operation of transformers. Summary of the invention

[0006] Based on the existing problems, the present invention provides an intelligent moisture-proof box for a transformer tap changer gear box. During the operation of the transformer tap changer gear box, the intelligent moisture-proof box can automatically turn on the heating function to effectively remove moisture and dehumidify. The realization of this function will greatly reduce the risk of rust caused by moisture inside the gear box, thereby improving the operating stability of the equipment. At the same time, the temperature and humidity of the internal environment can be monitored in real time. The introduction of this system will facilitate maintenance personnel to promptly discover abnormal conditions and take timely measures to deal with them, thereby ensuring the reliable operation of key components of the transformer. Through the realization of the above functions, the intelligent moisture-proof box of the present invention will effectively improve the maintenance efficiency of the transformer tap changer gear box, reduce the risk of failures, and ultimately ensure the safe and stable operation of the power grid.

[0007] The technical solution adopted by the present invention is:

[0008] A transformer tap switch gear box intelligent moisture-proof box, comprising a moisture-proof box body, which is installed above a main transformer gear box and is connected to the main transformer gear box; a temperature and humidity sensor and a dehumidification device that communicate with a background management system are installed in the moisture-proof box body; an air inlet of the dehumidification device passes through the moisture-proof box body and is exposed to the outside, and an air outlet passes through the moisture-proof box body and extends into the main transformer gear box; a water vapor exhaust port is also provided on the moisture-proof box body.

[0009] Furthermore, the intelligent moisture-proof box of the transformer tap changer gear box adopts a convection drying method to work, by heating the external air and introducing it into the main transformer gear box; at the same time, based on the air fluidity, the moisture or other liquid inside the main transformer gear box is evaporated through the connecting port between the moisture-proof box body and the main transformer gear box, enters the moisture-proof box body, and is then discharged from the water vapor exhaust port.

[0010] Furthermore, a box door is rotatably installed on one side of the moisture-proof box body, some transmission gears of the main gear box are located inside the moisture-proof box body, and a through hole is provided on the box door, and the output shaft of the main gear box passes through the box door and is connected to some transmission gears of the main gear box in the moisture-proof box body.

[0011] Furthermore, a small camera for communicating with a background management system is installed in the moisture-proof box.

[0012] Furthermore, an intelligent humidity control module is installed in the moisture-proof box body, and the intelligent humidity control module communicates with the background management system and is connected to the temperature and humidity sensor and the dehumidification device.

[0013] An intelligent humidity control algorithm for a main transformer gear box, the intelligent humidity control algorithm is based on the above-mentioned transformer tap changer gear box intelligent moisture-proof box, comprising the following steps:

[0014] Step 1: The intelligent humidity control module collects the current temperature and humidity data in real time through the temperature and humidity sensor t ;

[0015] Step 2: Set the humidity threshold H through the intelligent humidity control module th ,The humidity threshold is set according to the optimal operating humidity range of the main transformer gear box;

[0016] Step 3: Use the PID control algorithm to calculate the working intensity P(t) of the dehumidification device so that the humidity value remains stable near the threshold.

[0017] Furthermore, the calculation formula of the PID control algorithm is as follows:

[0018]

[0019] Where P(t) is the working intensity of the dehumidification device at time t, which controls the degree of heating; K p is the proportional coefficient, which determines the linear relationship between the control signal and the humidity deviation; e(t) is the current humidity deviation; K i K is the integral coefficient, which accumulates the cumulative effect of humidity deviation and is used to eliminate the long-term effect of deviation; d is the differential coefficient, based on the rate of change of humidity deviation, to prevent excessive humidity fluctuations; is the humidity deviation integral in the time interval [0, t]; is the derivative of humidity deviation with respect to time;

[0020] The calculation formula of the current humidity deviation e(t) is as follows:

[0021] e(t)=H t -H th

[0022] In the formula, H t H is the current temperature and humidity data collected in real time by the temperature and humidity sensor; th Humidity threshold set for the intelligent humidity control module;

[0023] When the humidity deviation e(t) is large, increase the working intensity P(t) of the dehumidification device; when the humidity deviation e(t) is close to zero, reduce the working intensity of the dehumidification device to keep the humidity near the set threshold; if e(t) deviates in the opposite direction, adjust by reducing or shutting down the dehumidification device.

[0024] Furthermore, a data analysis and trend prediction module is installed in the moisture-proof box body, and the data analysis and trend prediction module communicates with the background management system and is connected with the intelligent humidity control module and the temperature and humidity sensor.

[0025] A data analysis and trend prediction method for the humidity of a main transformer gear box, the data analysis and trend prediction method is based on the above-mentioned transformer tap changer gear box intelligent moisture-proof box, comprising the following steps:

[0026] Step 1: The data analysis and trend prediction module collects temperature and humidity data in the moisture-proof box based on the temperature and humidity sensor and stores it in time series;

[0027] Step 2: The data analysis and trend prediction module uses a linear regression model to predict the humidity trend in the future and determine whether it is likely to exceed the threshold.

[0028] Step 3: When the predicted humidity value H t+k At the kth time point, the threshold H may be exceeded thWhen an alarm occurs, the data analysis and trend prediction module sends a message to the background management system to trigger an early warning.

[0029] Furthermore, the calculation formula for time series prediction in the linear regression model is as follows:

[0030] H t+k =a0+a1·H t +a2·H t-1 +...+a n ·H t-n

[0031] In the formula, H t+k is the predicted humidity value at k moments in the future; a0, a1, ..., a n is the regression coefficient, obtained by fitting historical data; H t ,H t-1 ,...H t-n is the historical humidity data;

[0032] According to the set humidity threshold H th , determine the future humidity forecast value H t+k Is it possible to exceed the threshold? If the future predicted value H t+k Close to or exceeding H th ,The data analysis and trend prediction module sends a message to the background management system to trigger an early warning.

[0033] Beneficial effects:

[0034] The beneficial effects of the transformer tap changer gear box intelligent moisture-proof box are mainly reflected in the following aspects:

[0035] 1. Improve maintenance efficiency

[0036] Automatic monitoring: Built-in temperature and humidity sensors can monitor the environmental conditions inside the gear box in real time, reducing the need to rely on regular manual inspections.

[0037] Intelligent dehumidification: The dehumidification device can automatically adjust according to the actual humidity data, improving the pertinence and timeliness of moisture prevention.

[0038] 2. Reduce the risk of failure

[0039] Real-time early warning: Through intelligent humidity control algorithms and data analysis modules, the system can detect potential moisture problems in advance and notify maintenance personnel in time to prevent failures.

[0040] Adapt to environmental changes: With trend prediction capabilities, it can judge environmental changes in advance based on data analysis and reduce the risk of equipment failure caused by moisture.

[0041] 3. Improve equipment safety

[0042] Effective moisture-proof: By introducing convection drying and water vapor discharge mechanism, the humidity inside the transformer can be effectively reduced, and the stability and safety of the transformer can be improved.

[0043] Continuous monitoring: The built-in small camera can visually monitor the internal status of the gear box, providing a basis for maintenance decisions.

[0044] 4. Reduce maintenance costs

[0045] Reduce labor costs: Through intelligent means, the frequency of manual maintenance is reduced, and labor costs are reduced.

[0046] Extend equipment life: Timely treatment of moisture issues can reduce equipment failures and damage, thereby extending the service life of the transformer and reducing equipment replacement and repair costs.

[0047] 5.Support intelligent management

[0048] Data integration: The sensor data inside the moisture-proof box can be connected to the background management system to form an integrated intelligent monitoring platform that supports remote management and maintenance.

[0049] Decision support: Through the analysis and prediction of humidity data, a scientific basis is provided for maintenance strategies and equipment management, thus improving the overall operation and maintenance efficiency.

[0050] 6. Strong adaptability

[0051] Flexible layout: It can be customized or adjusted according to different types of transformers and installation environments to meet different moisture-proof requirements.

[0052] In summary, the transformer tap changer gear box intelligent moisture-proof box helps to ensure the normal operation of the transformer, maintain the safety and reliability of power equipment, and promote the development of intelligent power equipment; it can effectively solve the main equipment failure caused by rainwater intrusion, and through the convection drying principle and remote temperature and humidity acquisition control, the temperature and humidity in the moisture-proof box can be achieved in real time. It can make timely alarms and detect the operation of moisture-proof, and can realize remote control to avoid damage to key equipment and increase the workload of operation and maintenance.

[0053] In addition, the intelligent moisture-proof box of the transformer tap changer gear box is transplanted or promoted to the moisture-proof of key components such as the main transformer capacitor-type high-voltage bushing end screen, the oil-immersed current transformer end screen, the circuit breaker sulfur hexafluoride barometer, the main transformer gas relay, the main transformer thermometer, the current transformer secondary junction box, and the voltage transformer secondary junction box, which has a broad application market and significant promotion significance in the later stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0055] Figure 1 It is a schematic diagram of the transformer tap changer gear box intelligent moisture-proof box of the present invention being installed on the main transformer gear box;

[0056] Figure 2 It is a flow chart of the intelligent humidity control algorithm for the main transformer gear box of the present invention;

[0057] Figure 3 It is a flow chart of the data analysis and trend prediction method for the humidity of the main gear box of the present invention;

[0058] In the figure, 1 is the moisture-proof box body; 2 is the dehumidification device; 3 is the water vapor outlet; 4 is the box door; 5 is the output shaft of the main transformer gear box; 6 is part of the transmission gear of the main transformer gear box; 7 is the temperature and humidity sensor. DETAILED DESCRIPTION

[0059] The following will be combined with the drawings of the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0060] Example 1

[0061] This embodiment provides a transformer tap changer gear box intelligent moisture-proof box; Figure 1 As shown, the transformer tapping switch gear box intelligent moisture-proof box includes a moisture-proof box body 1, which is installed above the main transformer gear box and is connected to the main transformer gear box. A box door 4 is rotatably installed on one side of the moisture-proof box body 1, and part of the transmission gear 6 of the main transformer gear box is located in the moisture-proof box body 1, and a through hole is provided on the box door 4. The output shaft 5 of the main transformer gear box passes through the box door 4 and is transmission-connected with part of the transmission gear 6 of the main transformer gear box in the moisture-proof box body 1.

[0062] Furthermore, the moisture-proof box body 1 in this embodiment is equipped with a temperature and humidity sensor 7 and a dehumidification device 2 that communicate with the background management system; the air inlet of the dehumidification device 2 passes through the moisture-proof box body 1 and is exposed to the outside, and the air outlet passes through the moisture-proof box body 1 and extends to the main gear box, and a water vapor outlet 3 is also provided on the moisture-proof box body 1. The dehumidification device 2 in this embodiment can be a hot air blower.

[0063] The working principle of the transformer tap changer gear box intelligent moisture-proof box is as follows:

[0064] The intelligent moisture-proof box of the transformer tap switch gear box adopts a convection drying method to work by heating the external air and introducing it into the main transformer gear box; at the same time, based on the air fluidity, the moisture or other liquid inside the main transformer gear box is volatilized through the moisture-proof box body 1 and the connecting port between the main transformer gear box, enters the moisture-proof box body 1, and is then discharged from the water vapor exhaust port 3.

[0065] Furthermore, as a preferred technical solution of this embodiment, in order to be able to visually monitor the internal state of the gear box, such as Figure 1 As shown, a small camera communicating with the background management system is installed in the moisture-proof box body 1, and the background management system can visually monitor the internal state of the gear box in real time through the small camera.

[0066] Example 2

[0067] On the basis of Example 1, further improvements are made. Specifically, in this embodiment, an intelligent humidity control module is installed in the moisture-proof box body, and the intelligent humidity control module communicates with the background management system and is connected to the temperature and humidity sensor and the dehumidification device.

[0068] Based on the transformer tap changer gear box intelligent moisture-proof box equipped with an intelligent humidity control module, this embodiment provides an intelligent humidity control algorithm for the main transformer gear box. The intelligent humidity control algorithm communicates with the background management system through the intelligent humidity control module and dynamically adjusts the working frequency of the dehumidification device based on current and historical humidity data. Figure 2 As shown, the specific steps include:

[0069] Step 1: The intelligent humidity control module collects the current temperature and humidity data in real time through the temperature and humidity sensor t ;

[0070] Step 2: Set the humidity threshold H through the intelligent humidity control module th ,The humidity threshold is set according to the optimal operating humidity range of the main transformer gear box;

[0071] Step 3: Use the PID control algorithm to calculate the working intensity P(t) of the dehumidification device so that the humidity value remains stable near the threshold.

[0072] Furthermore, the calculation formula of the PID control algorithm in Step 3 is as follows:

[0073]

[0074] Where P(t) is the working intensity of the dehumidification device at time t, which controls the degree of heating; K pis the proportional coefficient, which determines the linear relationship between the control signal and the humidity deviation; e(t) is the current humidity deviation; K i K is the integral coefficient, which accumulates the cumulative effect of humidity deviation and is used to eliminate the long-term effect of deviation; d is the differential coefficient, based on the rate of change of humidity deviation, to prevent excessive humidity fluctuations; is the humidity deviation integral in the time interval [0, t]; is the time derivative of the humidity deviation.

[0075] The calculation formula of the current humidity deviation e(t) is as follows:

[0076] e(t)=H t -H th

[0077] In the formula, H t H is the current temperature and humidity data collected in real time by the temperature and humidity sensor; th Humidity threshold set for the intelligent humidity control module.

[0078] When the humidity deviation e(t) is large, increase the working intensity P(t) of the dehumidification device; when the humidity deviation e(t) is close to zero, reduce the working intensity of the dehumidification device to keep the humidity near the set threshold; if e(t) deviates in the opposite direction, adjust by reducing or shutting down the dehumidification device.

[0079] Example 3

[0080] Further improvements are made on the basis of Example 2. Specifically, in this embodiment, a data analysis and trend prediction module is installed in the moisture-proof box body, and the data analysis and trend prediction module communicates with the background management system and is connected with the intelligent humidity control module and the temperature and humidity sensor.

[0081] Based on the transformer tap changer gear box intelligent moisture-proof box equipped with an intelligent humidity control module and a data analysis and trend prediction module, this embodiment provides a data analysis and trend prediction method for the humidity of the main transformer gear box. The data analysis and trend prediction method stores and analyzes the temperature and humidity historical data based on the data analysis and trend prediction module, and warns of humidity risks in advance through trend prediction and alarm functions. Figure 3 As shown, the specific steps include:

[0082] Step 1: The data analysis and trend prediction module collects temperature and humidity data in the moisture-proof box based on the temperature and humidity sensor and stores it in time series;

[0083] Step 2: The data analysis and trend prediction module uses a linear regression model to predict the humidity trend in the future and determine whether it is likely to exceed the threshold.

[0084] Step 3: When the predicted humidity value H t+k At the kth time point, the threshold H may be exceeded th When an alarm occurs, the data analysis and trend prediction module sends a message to the background management system to trigger an early warning.

[0085] Furthermore, the calculation formula for time series prediction in the linear regression model in Step 2 is as follows:

[0086] H t+k =a0+a1·H t +a2·H t-1 +...+a n ·H t-n

[0087] In the formula, H t+k is the predicted humidity value at k moments in the future; a0, a1, ..., a n is the regression coefficient, obtained by fitting historical data; H t ,H t-1 ,...H t-n For historical humidity data.

[0088] According to the set humidity threshold H th , determine the future humidity forecast value H t+k Is it possible to exceed the threshold? If the future predicted value H t+k Close to or exceeding H th ,The data analysis and trend prediction module sends a message to the background management system to trigger an early warning.

[0089] The backend management system provides graded warnings based on the predicted results exceeding the standard:

[0090] Low risk: The predicted humidity is approaching the threshold, but will not exceed the threshold in the short term, prompting monitoring personnel to pay close attention. Medium risk: The predicted humidity is close to or slightly exceeds the threshold, and maintenance personnel are advised to check the intelligent moisture-proof box of the transformer tap changer gear box. High risk: The predicted humidity far exceeds the set threshold, which may cause the main transformer gear box to fail, triggering a third-level alarm and linking with the power grid automation system.

[0091] Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and describes these embodiments in detail in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An intelligent moisture-proof box for a transformer tap changer gear box, characterized in that: It includes a moisture-proof box body, which is installed above the main gear box and is connected to the main gear box; A temperature and humidity sensor and a dehumidification device that communicate with the background management system are installed in the moisture-proof box body; the air inlet of the dehumidification device passes through the moisture-proof box body to be exposed to the outside, and its air outlet passes through the moisture-proof box body and extends to the main transmission gear box. A water vapor exhaust port is also provided on the moisture-proof box body.

2. The intelligent moisture-proof box for the transformer tap changer gear box according to claim 1 is characterized in that: The intelligent moisture-proof box of the transformer tap changer gear box adopts convection drying to work by heating the external air and introducing it into the main transformer gear box; at the same time, based on the air fluidity, the moisture or other liquid inside the main transformer gear box is evaporated through the connecting port between the moisture-proof box body and the main transformer gear box, enters the moisture-proof box body, and is then discharged from the water vapor exhaust port.

3. The intelligent moisture-proof box for the transformer tap changer gear box according to claim 1 is characterized in that: A box door is rotatably installed on one side of the moisture-proof box body, some transmission gears of the main gear box are located in the moisture-proof box body, and a through hole is provided on the box door. The output shaft of the main gear box passes through the box door and is connected to some transmission gears of the main gear box in the moisture-proof box body.

4. The intelligent moisture-proof box for the transformer tap changer gear box according to claim 1 is characterized in that: A small camera communicating with the background management system is installed in the moisture-proof box.

5. The intelligent moisture-proof box for the transformer tap changer gear box according to claim 1 is characterized in that: An intelligent humidity control module is installed in the moisture-proof box body. The intelligent humidity control module communicates with the background management system and is connected with the temperature and humidity sensor and the dehumidification device.

6. An intelligent humidity control algorithm for a main transformer gear box, the intelligent humidity control algorithm is based on the intelligent moisture-proof box for the transformer tap changer gear box according to claim 5, characterized in that: The following steps are involved: Step 1: The intelligent humidity control module collects the current temperature and humidity data in real time through the temperature and humidity sensor t ; Step 2: Set the humidity threshold H through the intelligent humidity control module th ,The humidity threshold is set according to the optimal operating humidity range of the main transformer gear box; Step 3: Use the PID control algorithm to calculate the working intensity P(t) of the dehumidification device so that the humidity value remains stable near the threshold.

7. The intelligent humidity control algorithm for the main gear box of claim 6 is characterized in that: The calculation formula of PID control algorithm is as follows: Where P(t) is the working intensity of the dehumidification device at time t, which controls the degree of heating; K p is the proportional coefficient, which determines the linear relationship between the control signal and the humidity deviation; e(t) is the current humidity deviation; K i K is the integral coefficient, which accumulates the cumulative effect of humidity deviation and is used to eliminate the long-term effect of deviation; d is the differential coefficient, based on the rate of change of humidity deviation, to prevent excessive humidity fluctuations; is the humidity deviation integral in the time interval [0, t]; is the derivative of humidity deviation with respect to time; The calculation formula of the current humidity deviation e(t) is as follows: e(t)=H t -H th In the formula, H t H is the current temperature and humidity data collected in real time by the temperature and humidity sensor; th Humidity threshold set for the intelligent humidity control module; When the humidity deviation e(t) is large, increase the working intensity P(t) of the dehumidification device; when the humidity deviation e(t) is close to zero, reduce the working intensity of the dehumidification device to keep the humidity near the set threshold; if e(t) deviates in the opposite direction, adjust by reducing or shutting down the dehumidification device.

8. The intelligent moisture-proof box for the transformer tap changer gear box according to claim 5 is characterized in that: A data analysis and trend prediction module is installed in the moisture-proof box, and the data analysis and trend prediction module communicates with the background management system and is connected with the intelligent humidity control module and the temperature and humidity sensor.

9. A data analysis and trend prediction method for the humidity of the main transformer gear box, the data analysis and trend prediction method is based on the intelligent moisture-proof box for the transformer tap changer gear box according to claim 8, characterized in that: The following steps are involved: Step 1: The data analysis and trend prediction module collects temperature and humidity data in the moisture-proof box based on the temperature and humidity sensor and stores it in time series; Step 2: The data analysis and trend prediction module uses a linear regression model to predict the humidity trend in the future and determine whether it is likely to exceed the threshold. Step 3: When the predicted humidity value H t+k At the kth time point, the threshold H may be exceeded th When an alarm occurs, the data analysis and trend prediction module sends a message to the background management system to trigger an early warning.

10. The data analysis and trend prediction method for the humidity of the main transmission gear box according to claim 9 is characterized in that: The calculation formula for time series prediction in the linear regression model is as follows: H t+k =a0+a1·H t +a2·H t-1 +...+a n ·H t-n In the formula, H t+k is the predicted humidity value at k moments in the future; a0, a1, ..., a n is the regression coefficient, obtained by fitting historical data; H t ,H t-1 ,...H t-n is the historical humidity data; According to the set humidity threshold H th , determine the future humidity forecast value H t+k Is it possible to exceed the threshold? If the future predicted value H t+k Close to or exceeding H th ,The data analysis and trend prediction module sends a message to the background management system to trigger an early warning.

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