Transformer temperature detection tripping system
By introducing a self-detecting temperature module and an external detection temperature module into the transformer temperature detection system, including a temperature control box temperature probe and an infrared temperature measurement system, the problems of malfunctions caused by temperature control box failures and damage to the temperature measurement platinum resistance thermometer were solved, achieving more accurate temperature monitoring and stable operation of the transformer.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-25
- Publication Date
- 2026-03-20
AI Technical Summary
The existing transformer temperature protection system has the risk of false tripping and potential for accidents to escalate, mainly due to false closure caused by temperature control box failure or damage to the temperature measuring platinum resistance thermometer, resulting in the transformer being shut down unnecessarily.
It adopts a self-detecting temperature module and an external detection temperature module, including a temperature control box temperature probe and an infrared temperature measurement system. Through the series-connected temperature detection contacts and overcurrent protection module, the infrared temperature measurement system is added for secondary temperature measurement to ensure the accuracy of temperature monitoring.
This improves the accuracy and reliability of transformer temperature monitoring, prevents malfunctions, enhances the stability and safety of transformer operation, and reduces the risk of accidental shutdowns.
Smart Images
Figure CN224021451U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to overvoltage protection technical field, specifically, relate to a transformer temperature detection trip system. BACKGROUND
[0002] The transformer is the key equipment in the power system, and its operation state directly influences the stability and reliability of the whole system. The transformer generates heat due to internal loss in the continuous operation process, and if the temperature continuously rises and is not controlled in time, the internal overheat of the transformer will be caused. The overheat not only accelerates the aging of the insulating material, but also can cause the transformer short circuit and even burnout and other major safety accidents. Therefore, it is necessary to monitor the heating state of the transformer and output an alarm signal, or even cut off the faulty transformer, which can discover the hidden danger early, and achieve early discovery, early response and early disposal.
[0003] The existing transformer temperature protection has potential misoperation risk and accident expansion hidden danger in actual application. Only one temperature measuring platinum resistance is arranged in the transformer. When the temperature measuring platinum resistance is open, the measured temperature can be abnormally and rapidly increased. In this case, the temperature high alarm contact of the temperature control box, or even the overtemperature tripping contact, can be mis-closed, thereby causing the temperature overhigh protection action of the non-electric quantity protection device, and causing the transformer to be shut down, which brings great economic loss to the power system.
[0004] Secondly, the temperature protection tripping logic mainly depends on the temperature control box. If the temperature control box itself fails, the internal overtemperature tripping contact can be mis-closed, causing the temperature overhigh protection action of the non-electric quantity protection device, and causing the transformer to be mis-shut down. INVENTION CONTENTS
[0005] The utility model aims at providing a transformer temperature detection trip system to solve the possible misreporting in the prior art.
[0006] The utility model discloses the following technical scheme:
[0007] A transformer temperature detection trip system, comprising a self-detection temperature module, an external detection temperature module, a first transformer temperature detection contact and a second transformer temperature detection contact.
[0008] The self-detection temperature module is connected with the first transformer temperature detection contact, and the external detection temperature module is connected with the second transformer temperature detection contact.
[0009] The first transformer temperature detection contact and the second transformer temperature detection contact are connected in series with an overvoltage protection module.
[0010] Preferably, the first transformer temperature detection contact point comprises a first closing point and a second closing point, and the execution temperature threshold of the first closing point is less than that of the second closing point.
[0011] Preferably, the second transformer temperature detection contact point comprises a third closing point and a fourth closing point, and the execution temperature threshold of the third closing point is less than that of the fourth closing point.
[0012] Preferably, the self-detection temperature module comprises a temperature control box temperature probe and a transformer temperature control box, the temperature control box temperature probe is connected with the transformer temperature control box,
[0013] Preferably, the transformer temperature control box is connected with the first closing point and the second closing point respectively, and the transformer temperature control box is used for receiving data collected by the temperature control box temperature probe and sending a control signal for closing the first closing point or the second closing point.
[0014] Preferably, the external detection temperature module comprises an infrared temperature measurement terminal and an infrared temperature measurement system, the infrared temperature measurement terminal is connected with the infrared temperature measurement system,
[0015] Preferably, the infrared temperature measurement system is connected with the third closing point and the fourth closing point respectively, and the transformer temperature control box is used for receiving data collected by the infrared temperature measurement terminal and sending a control signal for closing the third closing point or the fourth closing point.
[0016] Preferably, the temperature control box temperature probe comprises a platinum thermal resistance temperature measurement module.
[0017] The technical scheme of the utility model has at least the following advantages and beneficial effects:
[0018] The above structure of the utility model mainly comprises a self-detection temperature module, an external detection temperature module, a first transformer temperature detection contact point and a second transformer temperature detection contact point; the self-detection temperature module is connected with the first transformer temperature detection contact point, and the external detection temperature module is connected with the second transformer temperature detection contact point. The first transformer temperature detection contact point and the second transformer temperature detection contact point are connected in series with the over-current protection module. The above structure increases an external detection temperature module, and the external detection temperature module can be an infrared temperature measurement system. The infrared temperature measurement system is used for temperature monitoring of the transformer as a whole in a temperature measurement site, and a secondary temperature measurement is performed to further confirm whether a temperature is too high, so as to prevent maloperation caused by temperature control box failure or damaged temperature measurement platinum resistance. BRIEF DESCRIPTION OF DRAWINGS
[0019] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. Other related drawings can also be obtained by those skilled in the art without creative labor on the premise of not paying creative labor.
[0020] Fig. 1 It is a schematic diagram of the overall structure of the present application.
[0021] Fig. 2 It is a schematic diagram of the structure of the self-detection temperature module of the present application.
[0022] Fig. 3 It is a schematic diagram of the structure of the external detection temperature module of the present application. DETAILED DESCRIPTION
[0023] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.
[0024] Please refer to Figs. 1-3 A transformer temperature detection tripping system, comprising a self-detection temperature module, an external detection temperature module, a first transformer temperature detection contact and a second transformer temperature detection contact.
[0025] The self-detection temperature module is connected with the first transformer temperature detection contact, and the external detection temperature module is connected with the second transformer temperature detection contact.
[0026] The first transformer temperature detection contact and the second transformer temperature detection contact are connected in series with the overcurrent protection module.
[0027] When the self-detection temperature module detects that the temperature exceeds the set threshold value, the first transformer temperature detection contact is closed to form a path. When the self-detection temperature module detects that the temperature exceeds the set threshold value, the second transformer temperature detection contact is closed to form a path. When the first transformer temperature detection contact and the second transformer temperature detection contact connected in series with the overcurrent protection module are closed at the same time, the overcurrent protection module is triggered to work and trip.
[0028] The utility model discloses a structure, mainly including including self -detection temperature module, external detection temperature module, first transformer temperature detection contact and second transformer temperature detection contact, self -detection temperature module is connected with first transformer temperature detection contact, and external detection temperature module is connected with second transformer temperature detection contact.
[0029] In an example embodiment of the utility model, the first transformer temperature detection contact includes a first closing point and a second closing point, and the execution temperature threshold of the first closing point is less than the execution temperature threshold of the second closing point.
[0030] The self-detection temperature module includes a temperature control box temperature probe and a transformer temperature control box, the temperature control box temperature probe is connected with the transformer temperature control box, the transformer temperature control box is connected with the first closing point and the second closing point respectively, and the transformer temperature control box is used for receiving data collected by the temperature control box temperature probe and sending a control signal for closing the first closing point or the second closing point.
[0031] In the embodiment, the first closing point is set as a transformer temperature high auxiliary contact, the second closing point is set as a transformer temperature overhigh auxiliary contact, two threshold judgment points are set, after the first closing point is closed, a prompt function is provided for the staff, and after the second closing point, it is indicated that high temperature appears in the transformer box.
[0032] In an example embodiment of the utility model, the second transformer temperature detection contact includes a third closing point and a fourth closing point, and the execution temperature threshold of the third closing point is less than the execution temperature threshold of the fourth closing point.
[0033] The external detection temperature module includes an infrared temperature measurement terminal and an infrared temperature measurement system, the infrared temperature measurement terminal is connected with the infrared temperature measurement system, the infrared temperature measurement system is connected with the third closing point and the fourth closing point respectively, and the transformer temperature control box is used for receiving data collected by the infrared temperature measurement terminal and sending a control signal for closing the third closing point or the fourth closing point.
[0034] The transformer temperature early warning system is provided with multiple infrared temperature measuring terminals, an infrared temperature measuring system (including hardware and data processing software), and a background display. The infrared temperature measuring terminal obtains temperature data of each pixel point in the measurement field of view, and comprehensively monitors the temperature of the transformer. In the picture of the same infrared temperature measuring terminal, the object is analyzed by adding a polygon temperature measuring object or point temperature measurement at will. According to the shape of the measured object, the area is circled, and the characteristic quantities such as the highest temperature, the lowest temperature, and the average temperature in the area are obtained. According to the characteristics of the transformer, the area is focused on the temperature measurement of specific objects such as high-voltage windings, iron cores, and high-voltage winding lead wires. Combined with the point temperature measurement of the sensor installed between the high-voltage windings, multiple temperature measurements of the high-voltage windings are realized. When the temperature measured by the infrared temperature measuring system exceeds the set early warning value, an early warning signal is sent. At the same time, the early warning signal is output to the non-electric quantity protection as a precondition for temperature overheat tripping logic.
[0035] The transformer temperature high and overheat discrimination circuit is provided with a temperature control box, an infrared temperature measuring system, a temperature measuring platinum resistance, and an infrared temperature measuring terminal. The first is used to discriminate the high and overheat states of the transformer winding temperature control box, and the second is used to discriminate the high state of the transformer temperature in the temperature measuring field of view of the infrared temperature measuring system. The two temperature high alarm nodes are respectively output to the monitoring system as alarm signals, and are simultaneously output to the non-electric quantity protection as one of the logic conditions for temperature overheat tripping.
[0036] As described above, in the embodiment, the third closing point is set as a transformer temperature early warning auxiliary contact, and the fourth closing point is set as a transformer temperature high early warning auxiliary contact, which is equivalent to setting two threshold judgment points. After the third closing point is closed, a prompt function is provided for the staff to timely find hidden dangers. After the fourth closing point is closed, high temperature alarm is performed.
[0037] Specifically, when the system is working, the system first uses the infrared temperature measuring system to monitor and warn the temperature of the transformer as a whole, and timely finds hidden dangers of the transformer. As the temperature rises, when the temperature high value is reached, the infrared temperature measuring system and the winding temperature measurement of the platinum resistance send a high temperature alarm. Finally, combined with the winding overheat contact of the platinum resistance, the non-electric quantity protection temperature overheat tripping input is formed.
[0038] When the temperature measuring platinum resistance measures the temperature of the transformer winding to be greater than the transformer temperature over-trip setting value due to failure, one or two signal contacts in the transformer tripping circuit are closed. At this time, since the infrared temperature measuring system does not monitor the transformer temperature to be greater than the temperature high setting value, the temperature high contact is not closed, and the transformer temperature over-trip circuit cannot be turned on. When the infrared temperature measuring system fails to cause the temperature warning and temperature high two signal contacts to be closed, since the temperature measuring platinum resistance does not monitor the transformer winding temperature to be greater than the transformer temperature over-trip setting value, the temperature over-trip contact is not closed, and the transformer temperature over-trip circuit cannot be turned on. When the temperature measuring platinum resistance and the infrared temperature measuring system simultaneously monitor the temperature in the transformer core to be greater than the temperature over-trip setting value and the temperature high setting value, the transformer temperature over-trip discriminant tripping is normally turned on and acts on tripping.
[0039] Through the above system, the infrared temperature measuring system is used to monitor the temperature of the transformer as a whole in the temperature measuring field of view, the infrared temperature measuring terminal obtains the temperature data of each pixel point in the measurement field of view, and the transformer temperature is comprehensively monitored. In the picture of the same infrared thermal imager, the temperature of the object or the point temperature is analyzed by adding a polygon temperature measuring object or a point temperature, the area is circled according to the shape of the measured object, the highest temperature, the lowest temperature, the average temperature and other characteristic quantities in the area are obtained, and according to the characteristics of the transformer, the area key temperature of the specific object such as the high-voltage winding, the iron core, the high-voltage winding lead-out line and the like is measured, and the multi-temperature measurement of the high-voltage winding and the low-voltage winding is realized by combining the sensor point temperature measurement installed between the high-voltage winding and the low-voltage winding.
[0040] The temperature data (the highest temperature, the lowest temperature and the average temperature) of the temperature measuring object in the selected area is continuously analyzed, and the temperature curve is recorded to predict the change trend of the transformer temperature, judge whether the transformer has problems such as aging and insulation reduction, and form a trend warning report to provide a decision basis for equipment state evaluation, maintenance strategy formulation and condition-based maintenance.
[0041] The infrared temperature measuring system is used to comprehensively monitor the transformer in the temperature measuring field of view, and the temperature warning function is used to realize the temperature abnormality warning of any part of the transformer at a relatively low temperature, which can provide more time for the operation and maintenance personnel to analyze and process the transformer hidden danger early.
[0042] The infrared temperature measuring system with slightly lower precision uses a lower temperature setting value for warning and temperature high alarm, which is used as a precondition for the temperature over-trip logic to prevent false operation caused by damage of the temperature measuring platinum resistance. The temperature measuring platinum resistance with higher precision uses a higher temperature over-trip contact with a temperature setting value to form a direct tripping temperature point, realizes higher operation temperature requirement of the transformer, and solves the problem of inaccurate tripping temperature point caused by slightly lower precision of the infrared temperature measuring system.
[0043] The platinum hot resistance and the infrared temperature measuring system are used to determine the temperature state of the transformer, the accuracy and reliability of the temperature protection sampling are improved obviously, the two systems can check and supplement each other, the transformer tripping caused by the temperature protection misoperation due to the failure of one system is avoided effectively, and the stability and safety of the transformer operation are improved greatly.
[0044] The preferred embodiments of the utility model are merely used for limiting the utility model, and the utility model can be changed and varied for the person skilled in the art. Any modification, equivalent replacement, improvement and the like within the spirit and principle of the utility model should be included in the protection scope of the utility model.
Claims
1. A transformer temperature detection and tripping system, characterized in that, It includes a self-temperature detection module, an external temperature detection module, a temperature detection contact for the first transformer, and a temperature detection contact for the second transformer; The self-detecting temperature module is connected to the temperature detection contact of the first transformer, and the external temperature detection module is connected to the temperature detection contact of the second transformer; The temperature detection contacts of the first transformer and the second transformer are connected in series with the overcurrent protection module.
2. The transformer temperature detection and tripping system according to claim 1, characterized in that, The first transformer temperature detection contact includes a first closed point and a second closed point, and the execution temperature threshold of the first closed point is less than the execution temperature threshold of the second closed point.
3. The transformer temperature detection and tripping system according to claim 2, characterized in that, The second transformer temperature detection contact includes a third closed point and a fourth closed point, wherein the execution temperature threshold of the third closed point is less than the execution temperature threshold of the fourth closed point.
4. The transformer temperature detection and tripping system according to claim 3, characterized in that, The self-detecting temperature module includes a temperature probe for a temperature control box and a transformer temperature control box, with the temperature probe for the temperature control box connected to the transformer temperature control box.
5. A transformer temperature detection and tripping system according to claim 4, characterized in that, The transformer temperature control box is connected to the first closed point and the second closed point respectively. The transformer temperature control box is used to receive the data collected by the temperature probe of the temperature control box and send the control signal to close the first closed point or the second closed point.
6. A transformer temperature detection and tripping system according to claim 5, characterized in that, The external temperature detection module includes an infrared temperature measurement terminal and an infrared temperature measurement system, and the infrared temperature measurement terminal is connected to the infrared temperature measurement system.
7. A transformer temperature detection and tripping system according to claim 6, characterized in that, The infrared temperature measurement system is connected to the third closed point and the fourth closed point respectively. The transformer temperature control box is used to receive the data collected by the infrared temperature measurement terminal and send the control signal to close the third closed point or the fourth closed point.
8. A transformer temperature detection and tripping system according to claim 4, characterized in that, The temperature probe of the temperature control box includes a platinum resistance thermometer module.