An oil plug detection device for power transformer

Abstract

The present invention provides an oil plug detection device for power transformers. The device comprises a power transformer body with heat sinks installed, a heat sink temperature monitoring system, a transformer oil temperature detection device, and a management and control system installed in a control room. The device can accurately determine whether an oil plug at a heat sink within each power transformer has affected its operation.

Description

Technical Field

[0001] The invention belongs to the technical field of electric power, and relates to an oil plug detection device for a power transformer. Background Art

[0002] Currently, in substations, transformer oil is circulated through multiple heat dissipation strips on the transformer body to achieve the effect of cooling the transformer. After a period of time, the transformer oil is prone to form embolism, also known as "oil plug".

[0003] "Oil plugs" are very harmful to transformers. The formation of oil plugs will weaken the heat dissipation effect of the transformer and shorten the service life of the transformer. The oil plugs attached to the heat dissipation strips will reduce the contact area between the radiator and the transformer oil, reducing the heat dissipation efficiency of the transformer oil, which can easily cause transformer accidents and cause power outages and electricity losses for users.

[0004] There are many power transformers in a substation, and it is difficult to accurately determine whether the oil plug at the heat sink in each power transformer has affected the operation of the power transformer. Therefore, a monitoring device is needed to estimate the content of the oil plug on the heat sink in the power transformer. Summary of the Invention

[0005] To solve the above problems, the present invention provides an oil plug detection device for a power transformer, which can determine the content of oil plugs at multiple heat dissipation strips inside the power transformer and whether it affects the normal operation of the power transformer.

[0006] The present invention provides an oil plug detection device for a power transformer, the structure of which includes:

[0007] A power transformer body is installed with a heat dissipation strip, and a plurality of temperature detection holes are provided on the upper end of the body. The heat dissipation strip contacts the transformer oil in the power transformer to reduce the temperature of the power transformer oil;

[0008] Heat sink temperature monitoring system, used to monitor the temperature of heat sinks in power transformers;

[0009] The transformer oil temperature detection device includes a cylindrical metal rod body, which is installed in the temperature detection hole at the upper end of the power transformer body. A temperature detection sensor is provided at the bottom of the metal rod body for detecting the temperature value of the transformer oil in the power transformer;

[0010] A management system installed in the control room, which has a communication module;

[0011] The control system includes an operation panel, a signal detection module and a communication module. The operation panel has the functions of setting parameter values ​​and displaying parameters. The signal detection module is connected to the temperature detection sensors in the heat dissipation strip temperature monitoring system and the transformer oil temperature detection device. The communication module of the control system establishes remote communication with the management system.

[0012] Furthermore, the heat sink temperature monitoring system includes a temperature sensing device that can monitor the temperature value at the heat sink in real time. The temperature sensing device also has a signal transmission end, which is connected to the signal detection module of the control system through a connecting line, so that the control system can receive the temperature parameter value detected by the heat sink temperature monitoring system.

[0013] Furthermore, after the transformer oil temperature detection device is installed on the power transformer body, the temperature detection sensor at the bottom can detect the temperature parameter value of the transformer oil inside the power transformer in real time. The temperature detection sensor also has a signal transmission end, which is connected to the signal detection module of the control system through a connecting line, so that the control system can receive the temperature parameter value in the temperature detection sensor.

[0014] Furthermore, an internal threaded through hole is provided in the temperature detection hole at the upper end of the power transformer body, so as to facilitate the removal of the transformer oil temperature detection device from the power transformer.

[0015] Furthermore, the upper end of the metal rod is provided with an external thread, which is connected to the internal thread at the temperature detection hole at the upper end of the power transformer body. By rotating the metal rod, the position of the temperature detection sensor at the bottom of the metal rod in the power transformer is adjusted.

[0016] Furthermore, after receiving the real-time temperature parameter values ​​of the temperature detection sensors in the heat dissipation strip temperature monitoring system and the transformer oil temperature detection device, the control system aggregates the two sets of parameter values ​​and transmits them to the management system.

[0017] Furthermore, the management system compiles the two sets of parameter values ​​into a table according to time. The table can count the temperature difference between the heat sink and the transformer oil. Based on the temperature difference, it is judged whether the heat sink can dissipate the heat of the transformer oil inside the transformer, thereby judging whether the oil plug on the surface of the radiator affects the heat dissipation of the power transformer.

[0018] The beneficial effects of the invention are: first, the transformer oil temperature detection device is replaced in time to ensure that the temperature detection end of the transformer oil temperature detection device will not be contaminated by the oil plug, and the temperature value of the transformer oil in the power transformer body can be accurately measured; second, the temperature detection device is installed in multiple temperature detection holes on the power transformer body, which can detect the temperature value of the transformer oil at various locations inside the power transformer; third, the control system compares the temperature value detected by the temperature detection device with the temperature value detected by the heat sink temperature monitoring system, and can judge the efficiency of the heat sink in dissipating the temperature of the transformer oil, and judge the size of the oil plug on the surface of the heat sink based on long-term data reference. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The invention provides a schematic diagram of the overall structure of an oil plug detection device for a power transformer;

[0020] Figure 2 The present invention is a schematic structural diagram of a transformer oil temperature detection device in an oil plug detection device for a power transformer.

[0021] Figure 1: 1. Power transformer body; 2. Heat sink; 3. Temperature detection hole; 4. Heat sink temperature monitoring system; 5. Transformer oil temperature detection device; 6. Management system; 7. Control system; 8. Metal rod. DETAILED DESCRIPTION

[0022] The following describes in detail a specific embodiment of an oil plug detection device for a power transformer according to the present invention in conjunction with the accompanying drawings.

[0023] like Figure 1 As shown, the present invention provides an oil plug detection device for a power transformer, the structure of which includes:

[0024] A power transformer body 1 is provided with a heat dissipation strip 2, and a plurality of temperature detection holes 3 are provided on the upper end of the body. The heat dissipation strip 2 on the power transformer body 1 contacts the transformer oil in the power transformer to reduce the temperature of the power transformer oil;

[0025] The heat dissipation strip temperature monitoring system 4 is used to monitor the temperature of the heat dissipation strip 2 in the power transformer;

[0026] like Figure 2 As shown, the transformer oil temperature detection device 5 includes a cylindrical metal rod 8, which is installed in the temperature detection hole 3 at the upper end of the power transformer body 1. A temperature detection sensor is provided at the bottom of the metal rod for detecting the temperature value of the transformer oil in the power transformer;

[0027] A management system 6 installed in the control room, the management system 6 having a communication module;

[0028] The control system 7 includes an operation panel, a signal detection module and a communication module. The operation panel has the function of setting parameter values ​​and displaying parameters. The signal detection module is connected to the temperature detection sensors in the heat dissipation strip temperature monitoring system 4 and the transformer oil temperature detection device 5. The communication module of the control system establishes remote communication with the management system 6.

[0029] According to the above, the heat sink temperature monitoring system 4 includes a temperature sensing device that can monitor the temperature value at the heat sink 2 in real time. The temperature sensing device also has a signal transmission end, which is connected to the signal detection module of the control system 7 through a connecting line, so that the control system 7 can receive the temperature parameter value detected by the heat sink temperature monitoring system 4.

[0030] According to the above, after the transformer oil temperature detection device 5 is installed on the power transformer body 1, the temperature detection sensor at the bottom can detect the temperature parameter value of the transformer oil inside the power transformer in real time. The temperature detection sensor also has a signal transmission end, which is connected to the signal detection module of the control system 7 through a connecting line, so that the control system 7 can receive the temperature parameter value in the temperature detection sensor.

[0031] like Figure 2 As shown, the temperature detection hole 3 at the upper end of the power transformer body 1 is further provided with an internal threaded through hole to facilitate the removal of the transformer oil temperature detection device 5 from the power transformer.

[0032] According to the above, the upper end of the metal rod body 8 is provided with an external thread, which is connected to the internal thread at the temperature detection hole 3 at the upper end of the power transformer body 1. By rotating the metal rod body 8, the position of the temperature detection sensor at the bottom of the metal rod body 8 in the power transformer is adjusted.

[0033] According to the above, after receiving the real-time temperature parameter values ​​of the temperature detection sensors in the heat sink temperature monitoring system 4 and the transformer oil temperature detection device 5, the control system 7 summarizes the two sets of parameter values ​​and transmits them to the management system 6.

[0034] According to the above, the management system 6 compiles the two sets of parameter values ​​into a table according to time. The table can count the temperature difference between the heat sink and the transformer oil. According to the temperature difference, it is judged whether the heat sink 2 can dissipate the heat of the transformer oil inside the transformer, thereby judging whether the oil plug on the surface of the radiator affects the heat dissipation of the power transformer.

[0035] The working principle of an oil plug detection device for power transformers is as follows:

[0036] The control system 7 is connected to a plurality of power transformers, so that the control system 7 can monitor the plurality of power transformers.

[0037] When the power transformer is just put into operation, the control system 7 monitors the temperature of the transformer oil and the heat dissipation strip 2 , plots the monitored temperatures into a table, and evaluates the heat dissipation efficiency of the heat dissipation strip 2 .

[0038] The staff formulates a work plan to dismantle the transformer oil temperature detection device 5 and clear the oil plug on its surface to ensure that the transformer oil temperature detection device 5 can accurately detect the temperature value of the transformer oil.

[0039] The transformer oil temperature detection device 5 can detect the temperature of the transformer oil in the power transformer body 1, and the transformer oil temperature detection device 5 can be controlled in the vertical position in the power transformer body 1 so that the transformer oil temperature detection device 5 can detect the temperature value of each position in the vertical direction of the temperature detection hole 3.

[0040] After the power transformer has been running for a period of time, oil plugs are attached to the surface of the internal heat sink 2, affecting the heat dissipation function of the transformer oil. At this time, the control system 7 detects the temperature inside the power transformer body 1 and compares it with the previous data to determine whether the heat dissipation efficiency of the heat sink 2 is reduced. According to the change in heat dissipation efficiency, the thickness of the oil plugs on the heat sink 2 is estimated.

[0041] The control system 7 sends the thickness of the oil plug in the power transformer to the management system 6, and the staff finds the power transformer and removes the oil plug in the body to enable the power transformer to operate normally.

[0042] Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention and are not intended to limit the present invention. Those skilled in the art will appreciate that they may modify or substitute equivalents for the specific embodiments of the present invention, provided that such modifications or variations are within the scope of protection of the pending claims.

Claims

1. An oil plug detection device for a power transformer, characterized in that: include: A power transformer body is installed with a heat dissipation strip, and a plurality of temperature detection holes are provided on the upper end of the body. The heat dissipation strip contacts the transformer oil in the power transformer to reduce the temperature of the power transformer oil; Heat sink temperature monitoring system, used to monitor the temperature of heat sinks in power transformers; The transformer oil temperature detection device includes a cylindrical metal rod body, which is installed in the temperature detection hole at the upper end of the power transformer body. A temperature detection sensor is provided at the bottom of the metal rod body for detecting the temperature value of the transformer oil in the power transformer; A management system installed in the control room, which has a communication module; The control system includes an operation panel, a signal detection module, and a communication module. The operation panel has the function of setting parameter values ​​and displaying parameters. The signal detection module is connected to the temperature detection sensor in the heat dissipation strip temperature monitoring system and the transformer oil temperature detection device. The communication module of the control system establishes remote communication with the management system. After receiving the real-time temperature parameter values ​​of the temperature detection sensors in the heat dissipation strip temperature monitoring system and the transformer oil temperature detection device, the control system aggregates the two sets of parameter values ​​and transmits them to the management system; The management system compiles the two sets of parameter values ​​into a table according to time. The table can calculate the temperature difference between the heat sink and the transformer oil. Based on the temperature difference, it is determined whether the heat sink can dissipate the transformer oil inside the transformer, thereby determining whether the oil plug on the surface of the radiator affects the heat dissipation of the power transformer.

2. The oil plug detection device for a power transformer according to claim 1, characterized in that: The heat sink temperature monitoring system includes a temperature sensing device that can monitor the temperature value at the heat sink in real time. The temperature sensing device also has a signal transmission end, which is connected to the signal detection module of the control system through a connecting line, so that the control system can receive the temperature parameter value detected by the heat sink temperature monitoring system.

3. The oil plug detection device for a power transformer according to claim 2, characterized in that: After the transformer oil temperature detection device is installed on the power transformer body, the temperature detection sensor at the bottom can detect the temperature parameter value of the transformer oil inside the power transformer in real time. The temperature detection sensor also has a signal transmission end, which is connected to the signal detection module of the control system through a connecting line, so that the control system can receive the temperature parameter value in the temperature detection sensor.

4. The oil plug detection device for a power transformer according to claim 1, characterized in that: An internal threaded through hole is provided in the temperature detection hole at the upper end of the power transformer body, which facilitates the removal of the transformer oil temperature detection device from the power transformer.

5. The oil plug detection device for a power transformer according to claim 4, characterized in that: The upper end of the metal rod is provided with an external thread, which is connected to the internal thread at the temperature detection hole at the upper end of the power transformer body. By rotating the metal rod, the position of the temperature detection sensor at the bottom of the metal rod in the power transformer is adjusted.

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