Leak-proof control method for oil discharge pipeline of vacuum oil filter

Abstract

The invention discloses an anti-leakage control method for an oil discharge pipeline of a vacuum oil filter, and relates to the technical field of transformer oil leakage prevention. The traditional oil discharge pipeline leakage prevention technology mostly needs large-scale infrastructure construction and installation of a large number of monitoring devices, the construction difficulty is large, the period is long, and the later maintenance cost is high. The pressure change of the oil discharge pipeline is monitored in real time through the flow indicator on the oil inlet side of the transformer oil tank; when the oil discharge pipeline leaks, the current indicator transmits a signal to the transformer side wireless transmitting end; the wireless transmitting end transmits the signal to a wireless receiving end on the side of the vacuum oil filter, and the wireless receiving end transmits the signal to a controller of the vacuum oil filter; and the controller controls the vacuum oil filter to stop running, and alarm information is sent out while oil discharge is stopped. The method does not need a large amount of construction and equipment like the traditional technology, the maintenance is simple, the automatic real-time monitoring and control of the leakage of the oil discharge pipeline are realized, and the construction and maintenance cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of transformer oil leakage prevention, and in particular to a method for controlling leakage prevention of an oil discharge pipeline of a vacuum oil filter. Background Art

[0002] In the daily operation and maintenance of power systems, vacuum oil filters are key equipment for ensuring transformer oil quality, and the safe operation of their oil drain lines is crucial. Leaks in these drain lines not only pollute the environment but can also cause power equipment failures, leading to serious economic losses and safety hazards. Currently, traditional technologies for leak prevention monitoring of vacuum oil filter drain lines have significant shortcomings.

[0003] Manual inspections rely on the professional experience and sense of responsibility of operation and maintenance personnel, making it difficult to achieve 24 / 7 continuous monitoring. Early or hidden leaks are easily missed due to inspection intervals. Video surveillance is limited by the camera's installation location and field of view, and cannot provide comprehensive and effective monitoring of complex terrain, obstructed areas, and nighttime environments. Drone patrols are constrained by flight time and weather conditions, and cannot continuously and stably scan the oil drainage pipeline in all directions, resulting in blind spots and the risk of missed detection. Although negative pressure wave technology can monitor continuously, it lacks sensitivity to small flow leaks, making it difficult to detect early subtle leaks in a timely manner, which may delay maintenance. Although fiber optic vibration monitoring can sense vibrations around the pipeline in real time, the sensor cables laid outside the pipe are susceptible to human damage or natural erosion. Once damaged, the entire monitoring system will be paralyzed.

[0004] Furthermore, most of these traditional technologies require large-scale infrastructure construction, such as trenching, laying cables, and installing numerous monitoring devices. This not only creates significant construction difficulties and timelines, but also leads to high maintenance costs. Faced with the growing safety demands placed on vacuum oil filter drain lines, existing technologies struggle to meet the stringent requirements of real-world leak detection in terms of timeliness, accuracy, comprehensiveness, and cost-effectiveness. Summary of the Invention

[0005] The technical problem to be solved and the technical task to be addressed by this invention are to improve and enhance existing technical solutions by providing a method for preventing leakage in the oil drain line of a vacuum oil filter. This method aims to prevent large-scale transformer oil leakage, reduce the risk of environmental pollution and economic losses, lower construction and maintenance costs, and ensure stable operation of the power system. To this end, this invention adopts the following technical solutions.

[0006] A method for preventing leakage of an oil discharge pipeline of a vacuum oil filter comprises the following steps: 1) Install a flow meter and a wireless transmitter on the oil inlet side of the transformer tank, and use the flow meter to monitor the pressure changes in the oil discharge pipeline between the vacuum oil filter and the transformer in real time; 2) When a leak occurs in the oil drain line and the pressure in the line is insufficient, causing the flow indicator contacts to reset, the flow indicator transmits the abnormal pressure signal to the wireless transmitter on the transformer side to which it is connected; 3) The wireless transmitter on the transformer side transmits the abnormal pressure signal to the wireless receiver on the vacuum oil filter side. After receiving the abnormal pressure signal, the wireless receiver on the vacuum oil filter side transmits the abnormal pressure signal to the controller of the vacuum oil filter; 4) After receiving the abnormal pressure signal, the controller sends a stop command to the vacuum oil filter, and the vacuum oil filter stops running and stops draining oil.

[0007] By monitoring the pressure changes in the oil drain pipeline in real time through the flow indicator on the oil inlet side of the transformer oil tank, abnormal fluctuations in the pipeline pressure can be detected in time. Once a leak occurs in the oil drain pipeline, the flow indicator contacts reset and transmit the pressure abnormality signal, which is then transmitted to the vacuum oil filter controller through the wireless transmitter and the wireless receiver. The controller issues a stop operation command to stop the vacuum oil filter from draining oil in time. Unlike traditional technologies, it does not require a large amount of construction and equipment, and is simple to maintain. It can effectively avoid large-scale leakage of transformer oil, reduce the risk of environmental pollution and economic losses, and ensure the stable operation of the power system. This method realizes automatic real-time monitoring and control of oil drain pipeline leakage, which not only improves the sensitivity, timeliness and accuracy of monitoring, but also avoids the time-consuming problem of manual inspections, and significantly reduces construction and maintenance costs.

[0008] As a preferred technical measure, a check valve is installed on the oil inlet side of the transformer oil tank. When abnormal pressure in the oil discharge line is detected, the check valve automatically closes. This check valve provides additional protection, preventing transformer oil from flowing back into the transformer in the event of a pipeline leak. This further reduces the possibility of transformer oil leaks, enhances the reliability and safety of the entire anti-leakage system, and provides more reliable protection for the transformer.

[0009] As a preferred technical approach, the controller is installed in a control cabinet. In step 4), upon receiving the abnormal pressure signal, the controller transmits an oil leakage signal to the control cabinet panel. The panel displays an oil leakage alarm, while a warning light flashes and an alarm sounds. This provides operators with a direct and timely leak alarm, allowing them to quickly identify leaks in the oil drain line and take timely countermeasures, shortening fault response time and improving troubleshooting efficiency.

[0010] As a preferred technical approach, the controller is connected to a monitoring system. When the controller receives an abnormal pressure signal, it transmits oil leakage information to the monitoring system. Operations and maintenance personnel can remotely obtain leakage information from the monitoring center and gain a comprehensive understanding of the entire system's operating status. This facilitates remote monitoring and fault diagnosis of the oil discharge pipeline, improving the efficiency and convenience of operations and management.

[0011] As a preferred technical measure, pressure sensors and flow sensors are installed at key points in the oil discharge pipeline to collect real-time pressure and flow data within the pipeline. This data is then transmitted to a monitoring system, which analyzes and compares the data to pinpoint the leak. This data analysis and comparison allows the monitoring system to accurately locate the leak. Accurate leak location helps maintenance personnel quickly reach the fault site for repair, reducing troubleshooting time and workload, lowering maintenance costs, and improving repair efficiency.

[0012] As a preferred technical approach, the monitoring system uses big data analytics and machine learning algorithms to perform real-time analysis of pressure and flow data, predict potential leaks, and issue early warnings, allowing operators to take preventive maintenance measures. The monitoring system uses historical operating data to build a predictive model, which then predicts potential leaks. This allows operators to take preventive maintenance measures before a leak occurs, such as replacing or repairing potentially faulty components. This prevents or reduces the likelihood of leaks, reduces equipment failure rates and repair costs, and improves equipment reliability and service life.

[0013] As a preferred technical approach, the wireless transmitter and receiver utilize switch signal wireless transmitters. This avoids the hassle of trenching and wiring required for traditional wired transmission, reducing installation costs and construction difficulty. Wireless transmission offers greater flexibility and scalability, and boasts long transmission distances, facilitating subsequent maintenance and upgrades, making it suitable for a variety of complex application scenarios.

[0014] Beneficial effects: When leakage occurs in the oil drain pipeline, this method can automatically stop the vacuum oil filter from draining oil in time. It does not require a lot of construction and equipment like traditional technologies, and is simple to maintain. It can effectively avoid large-scale leakage of transformer oil, reduce the risk of environmental pollution and economic losses, and ensure the stable operation of the power system. This method realizes automatic real-time monitoring and control of oil drain pipeline leakage, improves the sensitivity, timeliness and accuracy of monitoring, avoids the large amount of time-consuming manual inspections, and reduces construction and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic flow chart of the present invention.

[0016] Figure 2 It is a schematic diagram of the positions of the wireless transmitting end and the wireless receiving end of the present invention.

[0017] In the figure: 1. Transformer oil tank; 2. Flow indicator; 3. Wireless transmitter; 4. Check valve; 5. Wireless receiver. DETAILED DESCRIPTION

[0018] The technical solution of the present invention is further described in detail below with reference to the accompanying drawings.

[0019] Example 1 like Figure 1 、 2 As shown, a method for preventing leakage of an oil discharge pipeline of a vacuum oil filter includes the following steps: S1: A flow indicator 2, a check valve 4, and a wireless transmitter 3 are installed on the oil inlet side of the transformer oil tank 1. A wireless receiver 5, a control cabinet, and a controller located in the control cabinet are installed on the vacuum oil filter side. The flow indicator 2 is used to monitor the pressure changes in the oil discharge pipeline between the vacuum oil filter and the transformer in real time. S2: When the oil drain line between the vacuum oil filter and the transformer leaks, the pressure in the line is insufficient, causing the contacts of the flow indicator 2 to reset. The flow indicator 2 on the transformer oil tank 1 side transmits the abnormal pressure signal to the wireless transmitter 3 to which it is connected. The check valve 4 automatically closes to prevent the transformer oil from flowing back into the transformer oil tank 1 when the line leaks. S3: The wireless transmitter 3 on the transformer oil tank 1 side wirelessly transmits the abnormal pressure signal to the wireless receiver 5 on the vacuum oil filter side. After receiving the abnormal pressure signal, the wireless receiver 5 on the vacuum oil filter side transmits the abnormal pressure signal to the controller. S4: After receiving the abnormal pressure signal, the controller issues a stop command to the vacuum oil filter. The vacuum oil filter stops running and stops draining oil within 1 minute. In addition, the controller also sends an oil leakage signal to the control cabinet panel. The control cabinet panel displays the oil leakage alarm information. At the same time, the alarm light flashes and the alarm sounds to remind the staff to deal with it in time, shortening the fault response time and improving the fault handling efficiency.

[0020] In this embodiment, the wireless transmitter 3 is powered by a 9VDC battery, the controller is a PLC controller, and the wireless transmitter 3 and the wireless receiver 5 use the DTD110HB-4, a series 1 wireless switch signal transmitter, which can achieve point-to-point signal transmission within a range of 1 km. The oil drain pipeline with oil leakage can be located through the point-to-point signal transmission path.

[0021] This method does not require trenching and cable pulling, does not require card insertion, has almost no operating costs in the later stage, is easy to maintain, reasonably controls costs, and avoids the trouble of secondary wiring and cable replacement.

[0022] Example 2 What is different from the above embodiment 1 is that pressure sensors and flow sensors are added at key node positions of the oil drain pipeline to collect pressure and flow data in the pipeline in real time. The controller is connected to the monitoring system. When the controller receives a pressure abnormality signal, the controller sends the oil drain leakage information to the monitoring system, and the information data of the pressure sensor and the flow sensor are transmitted to the monitoring system in real time. The monitoring system can accurately locate the location of the leak by analyzing and comparing these data. Operation and maintenance personnel can fully understand the operating status of the entire system, remotely obtain leakage information at the monitoring center, and quickly go to the leak point for repairs, which reduces fault handling time and improves maintenance efficiency. This helps to achieve remote monitoring and fault diagnosis of the oil drain pipeline, and improves the efficiency and convenience of operation and maintenance management.

[0023] Example 3 The difference from Example 2 is that during daily operation, the pressure sensor and flow sensor continuously collect data and transmit it to the monitoring system. Based on big data analysis and machine learning algorithms, the monitoring system performs real-time analysis of these pressure and flow data, and predicts potential leakage risks by learning historical data and patterns. When abnormal trends are detected in the data, indicating that a leak may occur, the monitoring system will issue an early warning message in advance to notify the operation and maintenance personnel to take preventive maintenance measures, such as checking weak links in the pipeline and replacing aging components. This method can intervene in time before a leakage accident occurs, greatly reducing the probability of leakage accidents, improving the safety and stability of the vacuum oil filter discharge pipeline operation, and also reducing equipment damage and economic losses caused by leakage.

[0024] The above-mentioned method for preventing leakage of the oil discharge pipeline of a vacuum oil filter is a specific embodiment of the present invention, which has embodied the outstanding substantial features and significant progress of the present invention. According to actual use needs and under the guidance of the present invention, equivalent modifications in shape, structure, etc. can be made to it, which are all within the scope of protection of this scheme.

Claims

1. A method for preventing leakage of the oil discharge pipeline of a vacuum oil filter, characterized in that The following steps are involved: 1) Install a flow meter and a wireless transmitter on the oil inlet side of the transformer tank, and use the flow meter to monitor the pressure changes in the oil discharge pipeline between the vacuum oil filter and the transformer in real time; 2) When a leak occurs in the oil drain line and the pressure in the line is insufficient, causing the flow indicator contacts to reset, the flow indicator transmits the abnormal pressure signal to the wireless transmitter on the transformer side to which it is connected; 3) The wireless transmitter on the transformer side transmits the abnormal pressure signal to the wireless receiver on the vacuum oil filter side. After receiving the abnormal pressure signal, the wireless receiver on the vacuum oil filter side transmits the abnormal pressure signal to the controller of the vacuum oil filter; 4) After receiving the abnormal pressure signal, the controller sends a stop command to the vacuum oil filter, and the vacuum oil filter stops running and stops draining oil.

2. A method for preventing leakage of an oil discharge pipeline of a vacuum oil filter according to claim 1, characterized in that: A check valve is installed on the oil inlet side of the transformer oil tank. When the pressure in the oil discharge pipeline is abnormal, the check valve will automatically close.

3. A method for preventing leakage of an oil discharge pipeline of a vacuum oil filter according to claim 2, characterized in that: The controller is installed in the control cabinet. In step 4), when the controller receives the abnormal pressure signal, the controller sends an oil leakage signal to the control cabinet panel. The control cabinet panel displays the oil leakage alarm information, and the alarm light flashes and the alarm sound is emitted.

4. A method for preventing leakage of an oil discharge pipeline of a vacuum oil filter according to claim 3, characterized in that: The controller is connected to the monitoring system. When the controller receives a pressure abnormality signal, the controller sends oil leakage information to the monitoring system.

5. The method for preventing leakage of the oil discharge pipeline of a vacuum oil filter according to claim 4, characterized in that: Pressure sensors and flow sensors are installed at key nodes of the oil discharge pipeline to collect real-time pressure and flow data in the pipeline, and transmit the data to the monitoring system. The monitoring system locates the leakage point through data analysis and comparison.

6. A method for preventing leakage of an oil discharge pipeline of a vacuum oil filter according to claim 5, characterized in that: Based on big data analysis and machine learning algorithms, the monitoring system conducts real-time analysis of pressure and flow data, predicts potential leakage risks, and issues early warning information so that operation and maintenance personnel can take preventive maintenance measures.

7. A method for preventing leakage of an oil discharge pipeline of a vacuum oil filter according to claim 6, characterized in that: The wireless transmitting end and the wireless receiving end adopt switching signal wireless remote transmitters.

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