CN115560865A - Converter transformer sleeve monitoring method and device - Google Patents
Converter transformer sleeve monitoring method and device Download PDFInfo
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- CN115560865A CN115560865A CN202211181840.3A CN202211181840A CN115560865A CN 115560865 A CN115560865 A CN 115560865A CN 202211181840 A CN202211181840 A CN 202211181840A CN 115560865 A CN115560865 A CN 115560865A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/02—Means for indicating or recording specially adapted for thermometers
- G01K1/024—Means for indicating or recording specially adapted for thermometers for remote indication
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
Abstract
The invention relates to a converter transformer bushing monitoring method and device, the temperature of a bushing of a converter transformer is obtained based on a wireless communication mode, if the temperature of the bushing is not within a preset temperature range, a temperature confirmation instruction is sent to a temperature detection device, confirmation temperature is obtained, the temperature confirmation instruction is used for controlling the temperature detection device to collect the temperature of the bushing, the collected temperature of the bushing is used as confirmation temperature to be fed back, if the temperature is not within the preset temperature range, an alarm signal is sent to an alarm device, and the alarm signal is used for controlling the alarm device to give an alarm. Through monitoring the temperature of the sleeve pipe, the abnormal problem of the sleeve pipe can be found in time, the manual maintenance working time is shortened, the frequency of high-altitude operation is reduced, early warning can be given to the abnormal condition of the sleeve pipe, the maintenance time is shortened, and the use is reliable.
Description
Technical Field
The application relates to the technical field of converter transformers, in particular to a method and a device for monitoring a sleeve of a converter transformer.
Background
The converter transformer bushing, namely the converter transformer high-voltage insulating bushing, is one of key group components of a converter transformer in a direct-current transmission system, and plays an important role in the safe operation of the high-voltage direct-current transmission system. In the long-term operation process, the high-voltage insulating sleeve not only bears working voltage and current for a long time, but also bears various overvoltage and short-circuit current generated by external faults of the transformer, and the operation environment is severe. In the actual use process, the high-voltage insulating sleeve works under high load for a long time, so that abnormal heating phenomena caused by poor contact of the wire clamp or aging of conductive grease and the like can occur at the connecting part of the lead at the top of the sleeve. This may lead to failure of the high voltage bushing and thus to an operation of the converter transformer.
Conventional methods for testing high voltage bushings regularly inspect the equipment by inspection personnel. However, because the casing is under high altitude, high pressure, etc., frequent high altitude inspection wastes a lot of manpower and material resources, and can not find out the tiny damage to the equipment in time. Once the casing pipe is abnormal, if the casing pipe cannot be processed in time, the casing pipe can be damaged irreversibly, and potential safety hazards can be brought to normal operation of the converter transformer seriously. Therefore, the conventional detection method of the converter transformer bushing is unreliable in use.
Disclosure of Invention
Based on this, it is necessary to provide a method and an apparatus for monitoring a converter transformer bushing, aiming at the problem that the conventional method for detecting a converter transformer bushing is unreliable in use.
A converter transformer bushing monitoring method comprises the following steps:
acquiring the temperature of a sleeve of the converter transformer based on a wireless communication mode;
if the temperature of the sleeve is not within the preset temperature range, sending a temperature confirmation instruction to a temperature detection device to obtain a confirmation temperature; the temperature confirmation instruction is used for controlling the temperature detection device to collect the temperature of the sleeve and feeding back the collected temperature of the sleeve as a confirmation temperature;
if the confirmed temperature is not within the preset temperature range, sending an alarm signal to an alarm device; the alarm signal is used for controlling the alarm device to alarm.
A converter transformer sleeve monitoring device comprises a temperature detection device, a wireless communication device, a control device and an alarm device, wherein the temperature detection device is connected with the wireless communication device, the wireless communication device and the alarm device are both connected with the control device, and the control device is used for monitoring the converter transformer sleeve according to the method.
According to the method and the device for monitoring the sleeve of the converter transformer, the temperature of the sleeve of the converter transformer is obtained based on a wireless communication mode, if the temperature of the sleeve is not within the preset temperature range, a temperature confirmation instruction is sent to the temperature detection device, the confirmation temperature is obtained, the temperature confirmation instruction is used for controlling the temperature detection device to collect the temperature of the sleeve, the collected temperature of the sleeve is used as the confirmation temperature to be fed back, if the temperature is not within the preset temperature range, an alarm signal is sent to the alarm device, and the alarm signal is used for controlling the alarm device to give an alarm. The temperature signal transmission of the sleeve is carried out by adopting a wireless communication method, frequent high-altitude operation is avoided, the temperature of the sleeve is monitored in real time by adopting a feedback monitoring mode according to a preset temperature range, temperature confirmation is carried out through a temperature confirmation instruction, and once the temperature abnormity is confirmed, an alarm device is controlled to give an alarm. Through monitoring the temperature of the sleeve, the abnormal problem of the sleeve can be found in time, the manual maintenance working time is shortened, the frequency of high-altitude operation is reduced, early warning for the abnormal sleeve can be realized, the maintenance time is shortened, and the use is reliable.
In one embodiment, the sending a temperature confirmation instruction to the temperature detection device to obtain the confirmation temperature if the temperature of the bushing is not within the preset target temperature range includes:
if the temperature of the sleeve is not within the preset target temperature range, sending a temperature confirmation instruction to a temperature detection device according to a preset confirmation frequency to obtain a preset number of feedback temperatures;
and taking the average value of the feedback temperatures as confirmation temperatures.
In one embodiment, the converter transformer bushing monitoring method further includes:
responding to the abnormal detection instruction, acquiring the temperature of a sleeve of the converter transformer within the detection time, and calculating the temperature fluctuation;
and when the temperature fluctuation is greater than or equal to a preset trust value, sending equipment abnormity prompt information to a display device for displaying.
In one embodiment, the obtaining the temperature of the bushing of the converter transformer within the detection time in response to the abnormality detection instruction, and calculating the temperature fluctuation include:
responding to the abnormal detection instruction, and acquiring the temperature of a sleeve of the converter transformer within the detection time according to a preset temperature measurement interval;
and calculating the temperature fluctuation of the casing temperature under the preset concentration condition.
In one embodiment, after obtaining the temperature of the bushing of the converter transformer based on the wireless communication manner, the method further includes:
and if the temperature of the sleeve is within a preset temperature range, sending the temperature of the sleeve to a display device for displaying, and returning to the temperature of the sleeve of the converter transformer obtained based on the wireless communication mode.
In one embodiment, if the temperature of the bushing is not within the preset target temperature range, the method further includes, after obtaining the confirmation temperature, sending a temperature confirmation instruction to the temperature detection device:
and if the confirmed temperature is within the preset temperature range, sending the confirmed temperature to a display device for displaying, and returning to the temperature of the sleeve of the converter transformer obtained based on the wireless communication mode.
In one embodiment, the obtaining the temperature of the bushing of the converter transformer based on the wireless communication manner includes:
and acquiring the temperature of the sleeve of the converter transformer according to the preset detection frequency based on a wireless communication mode.
In one embodiment, the preset target temperature range is a range greater than a lower target temperature limit and less than an upper target temperature limit.
In one embodiment, the converter transformer bushing monitoring device further comprises a display device, and the display device is connected with the control device.
Drawings
FIG. 1 is a schematic flow chart of a method for monitoring a sleeve of a converter transformer according to an embodiment;
FIG. 2 is a schematic flow chart illustrating obtaining a confirmation temperature according to one embodiment;
FIG. 3 is a schematic flow chart of a converter transformer bushing monitoring method in another embodiment;
FIG. 4 is a schematic flow chart illustrating the calculation of temperature fluctuation in one embodiment;
FIG. 5 is a schematic flow chart of a converter transformer bushing monitoring method in yet another embodiment;
FIG. 6 is a block diagram of a converter transformer bushing monitoring apparatus according to an embodiment;
FIG. 7 is a detailed flow chart of a converter transformer bushing monitoring method according to an embodiment;
fig. 8 is a detailed flowchart of a converter transformer bushing monitoring method in another embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
In one embodiment, a method for monitoring a sleeve of a converter transformer is provided. The converter transformer bushing is a high-voltage insulating bushing, and the converter transformer high-voltage insulating bushing is one of key components of a converter transformer in a direct-current transmission system and plays an important role in safe operation of the high-voltage direct-current transmission system. The type of the converter transformer bushing is not unique, for example, an oil paper condenser bushing and an epoxy resin impregnated paper condenser direct current bushing are respectively used for the network side bushing and the valve side bushing of the converter transformer. The method for monitoring the sleeve of the converter transformer can be used for monitoring different types of sleeves. The monitoring method for the sleeve of the converter transformer can be executed by a control device, and the control device can be an independently arranged controller, a data processor in a terminal or a data processing center in a server. The terminal can be but not limited to various personal computers, notebook computers, smart phones, tablet computers, internet of things equipment and portable wearable equipment, and the internet of things equipment can be smart sound boxes, smart televisions, smart air conditioners, smart vehicle-mounted equipment and the like. The portable wearable device can be a smart watch, a smart bracelet, a head-mounted device, and the like. The server may be implemented as a stand-alone server or as a server cluster comprised of multiple servers.
Referring to fig. 1, the method for monitoring the sleeve of the converter transformer includes the following steps:
and 102, acquiring the temperature of the sleeve of the converter transformer based on a wireless communication mode.
Specifically, the temperature of the sleeve of the converter transformer can be detected by the temperature detection device, the temperature detection device can be arranged in the sleeve of the converter transformer, and the temperature in the sleeve is detected to be used as the temperature of the sleeve, so that the influence of environmental factors on the temperature of the sleeve is reduced, and the detected temperature of the sleeve is more practical. The temperature detection device is connected with the control device through wireless communication, and after the temperature detection device detects the temperature of the sleeve, the temperature of the sleeve is transmitted to the control device through a wireless communication mode, and the control device carries out subsequent processing. The wireless communication method includes, but is not limited to, bluetooth, wiFi, zigbee communication method, and the like.
And step 104, if the temperature of the sleeve is not within the preset temperature range, sending a temperature confirmation instruction to the temperature detection device to acquire a confirmed temperature.
The temperature confirmation instruction is used for controlling the temperature detection device to collect the temperature of the sleeve, and the collected temperature of the sleeve is used as confirmation temperature to be fed back.
The preset target temperature range is a range that has been set before the monitoring of the casing. The preset target temperature range can be determined according to the working power of the converter transformer, for example, the preset target temperature range can be determined according to the average value of the normal temperatures of the tops of the bushings under different powers in the station in combination with the normal fluctuation range of the bushing temperature, and the obtained preset target temperature range can represent the temperature range of the bushings of the converter transformer when the bushings normally work.
And if the temperature of the sleeve is not in the preset target temperature range, and the temperature of the sleeve is considered to be abnormal, sending a temperature confirmation instruction to the temperature detection device. And after receiving the temperature confirmation instruction, the temperature detection device collects the temperature of the sleeve, takes the collected temperature of the sleeve as the confirmation temperature, feeds back the confirmation temperature and transmits the confirmation temperature to the control device. The control device thus acquires the confirmation temperature.
And step 106, if the temperature is not confirmed to be within the preset target temperature range, sending an alarm signal to an alarm device.
Wherein, the alarm signal is used for controlling the alarm device to alarm. And if the temperature is determined not to be in the preset temperature range, and the temperature of the sleeve is considered to be abnormal, sending an alarm signal to an alarm device. The alarm device receives the alarm signal and then gives an alarm, and the alarm mode is different according to different structures of the alarm device. For example, the alarm device may be an acoustic alarm, an optical alarm, or the like, and specifically may be a voice alarm, a buzzer, an indicator light, a display screen, or the like, which may be selected according to actual needs, and is not limited herein. When the temperature of the sleeve is not within the preset temperature range, the confirmation temperature is further acquired, whether alarming is needed or not is determined according to the confirmation temperature, alarming error touch can be avoided, and the monitoring effect is improved.
In the embodiment, the wireless communication method is adopted for transmitting the temperature signal of the sleeve, frequent high-altitude operation is avoided, the feedback monitoring mode is adopted for the sleeve monitoring method of the converter transformer, the temperature of the sleeve is monitored in real time according to the preset target temperature range, temperature confirmation is carried out through the temperature confirmation instruction, and once the temperature abnormity is confirmed, the alarm device is controlled to alarm. Through monitoring the temperature of the sleeve, the abnormal problem of the sleeve can be found in time, the manual maintenance working time is shortened, the frequency of high-altitude operation is reduced, early warning for the abnormal sleeve can be realized, the maintenance time is shortened, and the use is reliable.
In one embodiment, as shown in FIG. 2, step 104 includes step 204 and step 206.
And 204, if the temperature of the sleeve is not within the preset target temperature range, sending a temperature confirmation instruction to the temperature detection device according to a preset confirmation frequency, and acquiring a preset number of feedback temperatures.
If the temperature of the sleeve is not within the preset temperature range, further confirmation temperature needs to be obtained. At this time, a temperature confirmation instruction can be sent to the temperature detection device according to the preset confirmation frequency, so that the temperature detection device collects the temperature of the sleeve according to the preset confirmation frequency. The preset confirmation frequency is not unique, and may be, for example, 1HZ, that is, the temperature detection device detects the temperature of the sleeve once per second after receiving the temperature confirmation command, so as to better monitor the change of the temperature of the sleeve. Further, in step 102, when the control device needs to acquire the temperature of the bushing of the converter transformer, the temperature detection device may be controlled to acquire the temperature of the bushing of the converter transformer according to a preset detection frequency. The predetermined detection frequency may be smaller than the predetermined confirmation frequency to appropriately reduce the workload of the temperature detection device. The value of the preset detection frequency is not unique, for example, the preset detection frequency can be 1/60HZ, namely, the temperature detection device refreshes and measures the temperature once per minute, so that the abnormal temperature can be found in time, and energy is saved. It is understood that in other embodiments, the preset detection frequency may be other values, and may be determined according to the usage environment of the casing, and other factors.
The temperature detection device can obtain a plurality of temperature values after detecting the temperature of the sleeve according to the preset confirmation frequency. And when the number of the acquired temperature values reaches the preset number, the control device performs subsequent processing according to the preset number of the temperature values. The value of the preset number is not unique, and in the embodiment, the preset number may be 120. The preset number of feedback temperatures are obtained, the confirmation temperature is obtained according to the feedback temperatures, and the confirmation temperature can be more practical.
And step 206, taking the average value of the feedback temperatures as the confirmation temperature.
After a plurality of feedback temperatures are obtained, the average value of the feedback temperatures is used as the confirmation temperature, so that the confirmation temperature can reflect the temperature state of the sleeve more accurately.
In one embodiment, as shown in fig. 3, the converter transformer bushing monitoring method further comprises step 302 and step 304.
And 302, responding to the abnormal detection instruction, acquiring the temperature of the sleeve of the converter transformer within the detection time, and calculating the temperature fluctuation.
Specifically, if an abnormality detection command is received, it is considered that abnormality detection needs to be performed on the sleeve of the converter transformer at this time. At the moment, the temperature of the sleeve of the converter transformer in the detection time is acquired in response to the abnormity detection instruction, and the temperature fluctuation is calculated. The specific value of the detection time is not unique, for example, one hour, so that the detection efficiency can be ensured, and the accuracy of the obtained temperature can be improved. The temperature detection device detects the temperature of the sleeve within the detection time, the detected temperature is sent to the control device, and the control device calculates the temperature fluctuation according to the received temperature values. The temperature fluctuation is used for representing the deviation degree of the temperature data collected in the detection time period and the target temperature.
And 304, when the temperature fluctuation is larger than or equal to the preset trust value, sending equipment abnormity prompt information to a display device for displaying.
When the temperature fluctuation is larger than or equal to the preset trust value, the working stability of the casing is not trusted any more by considering that the temperature fluctuation of the casing is larger at the moment. At the moment, the control device sends equipment abnormity prompt information to the display device for displaying, and the display device displays equipment abnormity and reminds workers of equipment abnormity and needs to deal with the abnormity in time. In addition, when the temperature fluctuation is larger than or equal to the preset trust value, an alarm signal can be sent to the alarm device to control the alarm device to alarm, and the prompt effect is good.
In this embodiment, the control device can judge whether abnormal conditions such as equipment power grease aging and insufficient fastening torque exist according to the temperature fluctuation in the detection time, and the monitoring of the sleeve is better realized.
In one embodiment, as shown in FIG. 4, step 302 includes step 402 and step 404.
And 402, responding to the abnormal detection instruction, and acquiring the temperature of the sleeve of the converter transformer within the detection time according to a preset temperature measurement interval.
Further, when the sleeve needs to be subjected to abnormal detection, the temperature of the sleeve of the converter transformer in the detection time is obtained according to a preset temperature measurement interval in response to an abnormal detection instruction. The value of the preset temperature measurement interval is not exclusive and may be, for example, 1 minute. The temperature of the sleeve is obtained once every minute, so that abnormal temperature can be found in time, and the working load of the temperature detection device and the control device can be properly reduced.
Step 404, calculating temperature fluctuation of the casing temperature under a preset concentration condition.
Specifically, the preset concentration q is a time obtained from the detection time, and may be, for example, 0.2 times the detection time. The temperature fluctuation is calculated under the preset concentration condition, the calculation process can be simplified, and a more accurate temperature fluctuation value can be obtained. It is understood that in other embodiments, the predetermined concentration condition may be other, as long as one skilled in the art can realize the predetermined concentration condition.
The process of anomaly detection for casing may include:
step 1: let parameter tt =1;
and 2, step: the temperature of the casing detected by the temperature detection means is g (tt), while the tt = tt +1, tt increase process characterizes a time increase;
and step 3: repeating the step 2 until tt is greater than T, and finishing all temperature acquisition, wherein T is detection time;
and 4, step 4: the temperature fluctuation G (j) is calculated.
Wherein T is the detection time, j =1 \8230; (T-q), j increase process characterizes time increase. The fluctuation function F is calculated by the formula:
where s is the target temperature. The target temperature is a calibration target temperature under the current working power of the equipment and is a pre-calibration value.
And 5: if the volatility value G (j) is more than or equal to alpha, the display device displays that the equipment is abnormal; if the volatility value G (j) < α, j = j +1; α is a preset confidence value, which may be 30%, for example.
Step 6: and (5) repeating the steps 4-5 until j is greater than T-q, displaying that the equipment is not abnormal, and finishing the abnormal detection.
In one embodiment, as shown in fig. 5, after step 102, the converter transformer bushing monitoring method further comprises step 503.
Step 503: and if the temperature of the sleeve is within the preset temperature range, sending the temperature of the sleeve to a display device for displaying, and returning to obtain the temperature of the sleeve of the converter transformer based on the wireless communication mode.
If the temperature of the sleeve is within the preset temperature range, the temperature of the sleeve is considered to be abnormal, the temperature of the sleeve can be sent to the display device to be displayed, and the temperature change condition of the sleeve can be conveniently monitored by a worker at any time. Meanwhile, returning to the step 102, the temperature of the casing is continuously acquired, and subsequent processing is performed based on the acquired temperature of the casing.
In one embodiment, as shown in fig. 5, after step 104, the converter transformer bushing monitoring method further comprises step 505.
And 505, if the confirmed temperature is in the preset temperature range, sending the confirmed temperature to a display device for displaying, and returning to the step 102.
If the confirmed temperature is within the preset temperature range, the confirmed temperature can be sent to the display device to be displayed by considering that the temperature of the sleeve is not abnormal at the moment, and the temperature change condition of the sleeve can be conveniently monitored by a worker at any time. Meanwhile, returning to the step 102, the temperature of the casing is continuously acquired, and subsequent processing is performed based on the acquired temperature of the casing.
In one embodiment, as shown in FIG. 5, step 102 includes step 502.
And 502, acquiring the temperature of the sleeve of the converter transformer according to a preset detection frequency based on a wireless communication mode.
When the control device needs to acquire the temperature of the sleeve of the converter transformer, the temperature detection device can be controlled to acquire the temperature of the sleeve of the converter transformer according to the preset detection frequency. The predetermined detection frequency may be smaller than the predetermined confirmation frequency to appropriately reduce the workload of the temperature detection device. The value of the preset detection frequency is not unique, and can be 1/60HZ, namely, the temperature detection device refreshes and measures the temperature once per minute, so that the abnormal temperature can be found in time, and energy is saved. It is understood that in other embodiments, the preset detection frequency may be other values, and may be determined according to factors such as the use environment of the casing.
In one embodiment, the predetermined target temperature range is a range greater than the lower target temperature limit and less than the upper target temperature limit. Correspondingly, the fact that the temperature of the sleeve is not in the preset target temperature range means that the temperature of the sleeve is less than or equal to the target lower temperature limit, or the temperature of the sleeve is greater than or equal to the target upper temperature limit; the temperature of the sleeve is in the preset target temperature range, namely, the temperature of the sleeve is greater than the target lower temperature limit and less than the target upper temperature limit. Confirming that the temperature is not within the preset target temperature range means that the temperature is confirmed to be less than or equal to a target lower temperature limit, or the temperature is confirmed to be greater than or equal to a target upper temperature limit; confirming that the temperature is within the preset target temperature range means that the confirmed temperature is greater than the target lower temperature limit and less than the target upper temperature limit.
It should be understood that, although the steps in the flowcharts related to the embodiments as described above are sequentially displayed as indicated by arrows, the steps are not necessarily performed sequentially as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least a part of the steps in the flowcharts related to the embodiments described above may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, and the execution order of the steps or stages is not necessarily sequential, but may be performed alternately or alternately with other steps or at least a part of the steps or stages in other steps.
Based on the same inventive concept, the embodiment of the application also provides a converter transformer sleeve monitoring device for realizing the converter transformer sleeve monitoring method. The solution to the problem provided by the apparatus is similar to the solution described in the above method, so the specific limitations in one or more embodiments of the converter transformer bushing monitoring apparatus provided below may refer to the limitations on the converter transformer bushing monitoring method in the foregoing, and details are not described herein again.
In one embodiment, as shown in fig. 6, there is provided a converter transformer bushing monitoring device, which includes a temperature detecting device 100, a wireless communication device 200, a control device 300 and an alarm device 400, wherein the temperature detecting device 100 is connected to the wireless communication device 200, the wireless communication device 200 and the alarm device 400 are both connected to the control device 300, and the control device 300 is configured to perform converter transformer bushing monitoring according to the method described above.
In one embodiment, as shown in fig. 6, the converter transformer bushing monitoring device further comprises a display device 500, and the display device 500 is connected to the control device 300. The display device 500 may display relevant information under the control of the control device 300, facilitating better monitoring of the converter transformer bushing. The control device 300 includes a data processing module 310 and a feedback module 320, the wireless communication device 200, the alarm device 400 and the display device 500 are all connected to the data processing module 310, the data processing module 310 is connected to the feedback module 320, and the feedback module 320 is further connected to the wireless communication device 200. The feedback module 320 can send the temperature confirmation command from the data processing module 310 to the wireless communication device 200, and the wireless communication device 200 sends the temperature detection device 100 to control the temperature detection device 100 to detect the temperature of the bushing, so as to obtain the confirmation temperature.
For a better understanding of the above embodiments, the following detailed description is given in conjunction with a specific embodiment.
In one embodiment, the converter transformer bushing monitoring device comprises a temperature detection device 100, a wireless communication device 200, a control device 300, an alarm device 400 and a display device 500. Specifically, the wireless communication device 200 transmits the temperature signal and transmits the feedback instruction information through the wireless communication technology, where the temperature signal is a temperature signal of the casing, and the feedback instruction includes a temperature confirmation instruction. The converter transformer sleeve monitoring device is combined based on different structures to form a real-time temperature measuring system, a monitoring system or an abnormality detecting system so as to realize different functions.
The real-time temperature measuring system comprises a temperature detecting device 100, a wireless communication device 200, a data processing module 310 and a display device 500, wherein the temperature detecting device 100 measures casing temperature data according to a preset detecting frequency (for example, 1/60HZ, which can be changed according to the use environment), and transmits the casing temperature data to the display device 500 through the wireless communication device 200. The display device 500 includes an operable control interface that displays temperature data, anomaly data, graphical data, and the like.
The monitoring system adopts a feedback monitoring mode and comprises a temperature detection device 100, a wireless communication device 200, a data processing module 310, a feedback module 320, an alarm device 400 and a display device 500. The temperature detection device 100 sends temperature data to the wireless communication device 200 in real time, the wireless communication device 200 transmits the temperature data to the data processing module 310 in a wireless mode, the data processing module 310 judges whether the current casing temperature is within a target temperature range according to a preset target temperature, if not, the data processing module 310 generates a temperature confirmation instruction, the feedback system transmits the temperature confirmation instruction to the temperature detection device 100 until the temperature measurement instruction is finished, and the data processing module 310 calculates to obtain the confirmation temperature; the data processing module 310 determines again whether the confirmed temperature is within the target temperature range, and if not, the data processing module 310 transmits an alarm signal to the alarm device 400, and the data processing module 310 transmits data to the display device 500. The preset target temperature is calibrated in the early stage and corresponds to different preset target temperatures under different working powers. The preset target temperature includes a target upper temperature limit and a target lower temperature limit. The temperature is confirmed by taking the mean value, the temperature confirmation command is started, and the testing frequency of the temperature detection device 100 is changed to 1HZ (measuring temperature once per second).
The abnormity detection system adopts a feedback monitoring mode and analyzes abnormity in a fluctuation judgment mode. The abnormality detection system includes a temperature detection device 100, a wireless communication device 200, a data processing module 310, a feedback module 320, and a display device 500. The data source for fluctuation judgment is temperature data collected in detection time, and the fluctuation evaluation standard is the deviation degree of the temperature data in the centralized time period and the target temperature. The target temperature is a calibration target temperature under the current working power of the equipment and is a pre-calibration value. The detection time is a set detection time period, and the deviation degree is measured by the deviation mean value of all data in the concentration time period. The abnormality detection system can judge whether the possibility of equipment power grease aging and insufficient fastening torque exists according to temperature data fluctuation in detection time.
Specifically, the target temperature of the input device of the monitoring system under the working power is a (unit:degree) as the upper limit of the target temperature, b (unit:degree) as the lower limit of the target temperature, the temperature data is transmitted to the data processing module 310 in real time according to the fixed frame rate, the temperature is found to exceed the range of the upper limit and the lower limit of the target temperature, the data processing module 310 sends out a temperature confirmation instruction, and the confirmation temperature w is calculated, and N is the number of the temperatures used for calculating the confirmation temperature. The temperature confirmation command is started, and the test frequency of the temperature detection device 100 is changed to 1HZ (temperature measurement once per second).
As shown in fig. 7, which is a flow chart of the converter transformer bushing monitoring method, the temperature detection device measures the result bit g (unit: °), and t is the current test time.
The method comprises the following implementation steps:
step 1: detecting the temperature of the sleeve by a temperature detection device to obtain a real-time temperature measurement value g (t);
step 2: if b is less than the real-time temperature measurement value g (t) < a, the display device displays the real-time temperature measurement value; if the real-time temperature measurement value g (t) is more than or equal to a or the real-time temperature measurement value g (t) is less than or equal to b, temperature confirmation is carried out, and the temperature measurement frequency is changed to 1HZ;
and step 3: inputting the number N of temperatures for calculating the confirmation temperature (for example, N is 120), and increasing the time by 1s when the parameter i =1 and i is increased by 1;
and 4, step 4: measuring the temperature g (i) by a temperature detection device, recording the temperature by a data processing module, and increasing the number of representations of the i = i +1 in the i increasing process;
and 5: repeating step 4 until i > N;
step 6: calculating a confirmation temperature w, wherein
g (i) is the temperature after each i change;
and 7: if the confirmed temperature w is larger than or equal to a or smaller than or equal to b, the alarm device gives an alarm, and the display device displays the abnormal temperature; if b < confirmation temperature w < a, return to step 1.
The system selects an abnormality detection system, the data processing module sends an abnormality detection instruction to the feedback module, the feedback module sends a temperature confirmation instruction to the temperature detection device, the temperature detection device detects the temperature in a detection time T (unit: h) (T is usually more than 1h for ensuring efficiency and accuracy), the temperature measurement interval delta =1min, the data processing module calculates the temperature fluctuation qualitative G of the temperature in the detection time T under the condition that the concentration is q =0.2 × T, when the fluctuation exceeds a trust value alpha (the trust value is set according to requirements and is usually less than 30%, the system stability is not trusted any more when the system fluctuation exceeds a stable state by 30%, the system detection is more severe when the trust value is smaller, the temperature fluctuation in the casing is considered to be abnormal, and the equipment is possible to be abnormal.
The temperature fluctuation represents the deviation degree of the test temperature of the temperature detection device and a target temperature S (unit: °), wherein the target temperature is a calibrated target temperature of the equipment under the current working power.
As shown in fig. 8, which is a flow chart of the anomaly detection system provided in the embodiment of the present invention, an anomaly monitoring signal is sent out, a detection time T is input, a detection interval Δ is input, a concentration time period q is input, and a confidence value α is input. The trust value can be set to 30%, the variation tolerance of the equipment is comprehensively considered, the smaller the trust value is, the more sensitive the temperature variation of the equipment is, the possible aging problem of the equipment can be timely found, and warning and troubleshooting can be timely carried out.
The method comprises the following implementation steps:
step 1: let parameter tt =1;
step 2: the temperature of the casing detected by the temperature detection means is g (tt), while the tt = tt +1,tt increase process characterizes a time increase;
and step 3: repeating the step 2 until tt is greater than T, and finishing all temperature acquisition, wherein T is detection time;
and 4, step 4: the temperature fluctuation G (j) is calculated.
Wherein T is the detection time, j =1 \8230; (T-q), j increase process characterizes time increase. The fluctuation function F is calculated by the formula:
where s is the target temperature. The target temperature is a calibration target temperature under the current working power of the equipment and is a pre-calibration value.
And 5: if the volatility value G (j) is more than or equal to alpha, the display device displays that the equipment is abnormal; if the volatility value G (j) < α, j = j +1; α is a preset confidence value, which may be 30%, for example.
Step 6: and (5) repeating the steps 4-5 until j is larger than T-q, displaying that the equipment is not abnormal, and finishing the abnormal detection.
Based on converter transformer sleeve pipe monitoring devices, through wireless temperature-detecting device real-time supervision converter transformer high-voltage bushing top operating temperature to send the monitoring result to on-line monitoring system through wireless mode, be convenient for the operation and maintenance personnel master sleeve pipe temperature variation situation and development trend in real time.
According to the method and the device for monitoring the sleeve of the converter transformer, the temperature of the sleeve of the converter transformer is obtained based on a wireless communication mode, if the temperature of the sleeve is not within the preset temperature range, a temperature confirmation instruction is sent to the temperature detection device, the confirmation temperature is obtained, the temperature confirmation instruction is used for controlling the temperature detection device to collect the temperature of the sleeve, the collected temperature of the sleeve is used as the confirmation temperature to be fed back, if the temperature is not within the preset temperature range, an alarm signal is sent to the alarm device, and the alarm signal is used for controlling the alarm device to give an alarm. The temperature signal transmission of the sleeve is carried out by adopting a wireless communication method, frequent high-altitude operation is avoided, the temperature of the sleeve is monitored in real time by adopting a feedback monitoring mode according to a preset temperature range, temperature confirmation is carried out through a temperature confirmation instruction, and once the temperature abnormity is confirmed, an alarm device is controlled to give an alarm. Through monitoring the temperature of the sleeve pipe, the abnormal problem of the sleeve pipe can be found in time, the manual maintenance working time is shortened, the frequency of high-altitude operation is reduced, early warning can be given to the abnormal condition of the sleeve pipe, the maintenance time is shortened, and the use is reliable.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, and these are all within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A method for monitoring a sleeve of a converter transformer is characterized by comprising the following steps:
acquiring the temperature of a sleeve of the converter transformer based on a wireless communication mode;
if the temperature of the sleeve is not within the preset target temperature range, sending a temperature confirmation instruction to a temperature detection device to obtain a confirmation temperature; the temperature confirmation instruction is used for controlling the temperature detection device to collect the temperature of the sleeve and feeding back the collected temperature of the sleeve as a confirmation temperature;
if the confirmed temperature is not within the preset temperature range, sending an alarm signal to an alarm device; the alarm signal is used for controlling the alarm device to alarm.
2. The method of claim 1, wherein if the temperature of the casing is not within the preset temperature range, sending a temperature confirmation command to the temperature detection device to obtain a confirmation temperature, comprising:
if the temperature of the sleeve is not within the preset target temperature range, sending a temperature confirmation instruction to a temperature detection device according to a preset confirmation frequency to obtain a preset number of feedback temperatures;
and taking the average value of the feedback temperatures as confirmation temperatures.
3. The method of claim 1, further comprising:
responding to the abnormal detection instruction, acquiring the temperature of a sleeve of the converter transformer within detection time, and calculating the temperature fluctuation;
and when the temperature fluctuation is greater than or equal to a preset trust value, sending equipment abnormity prompt information to a display device for displaying.
4. The method according to claim 3, wherein said obtaining the temperature of the bushing of the converter transformer within the detection time in response to the abnormality detection command, and calculating the temperature fluctuation, comprises:
responding to the abnormal detection instruction, and acquiring the temperature of a sleeve of the converter transformer within the detection time according to a preset temperature measurement interval;
and calculating the temperature fluctuation of the casing temperature under the preset concentration condition.
5. The method according to claim 1, wherein after acquiring the temperature of the bushing of the converter transformer based on the wireless communication manner, the method further comprises:
and if the temperature of the sleeve is within a preset temperature range, sending the temperature of the sleeve to a display device for displaying, and returning to the step of acquiring the temperature of the sleeve of the converter transformer based on the wireless communication mode.
6. The method of claim 1, wherein if the temperature of the casing is not within the preset target temperature range, sending a temperature confirmation command to the temperature detection device, and after obtaining the confirmation temperature, further comprising:
and if the confirmed temperature is within the preset temperature range, sending the confirmed temperature to a display device for displaying, and returning to the temperature of the sleeve of the converter transformer obtained based on the wireless communication mode.
7. The method according to claim 1, wherein the obtaining the temperature of the bushing of the converter transformer based on the wireless communication manner comprises:
and acquiring the temperature of the sleeve of the converter transformer according to the preset detection frequency based on a wireless communication mode.
8. The method of any one of claims 1-7, wherein the predetermined target temperature range is a range greater than a lower target temperature limit and less than an upper target temperature limit.
9. A converter transformer bushing monitoring device is characterized by comprising a temperature detection device, a wireless communication device, a control device and an alarm device, wherein the temperature detection device is connected with the wireless communication device, the wireless communication device and the alarm device are both connected with the control device, and the control device is used for carrying out converter transformer bushing monitoring according to the method of any one of claims 1-8.
10. The converter transformer bushing monitoring device according to claim 9, further comprising a display device, wherein said display device is connected to said control device.
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| CN202211181840.3A CN115560865A (en) | 2022-09-27 | 2022-09-27 | Converter transformer sleeve monitoring method and device |
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| CN202211181840.3A CN115560865A (en) | 2022-09-27 | 2022-09-27 | Converter transformer sleeve monitoring method and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117629313A (en) * | 2024-01-26 | 2024-03-01 | 南京中鑫智电科技有限公司 | On-line monitoring method and system for oil expansion of converter transformer valve side sleeve |
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2022
- 2022-09-27 CN CN202211181840.3A patent/CN115560865A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117629313A (en) * | 2024-01-26 | 2024-03-01 | 南京中鑫智电科技有限公司 | On-line monitoring method and system for oil expansion of converter transformer valve side sleeve |
| CN117629313B (en) * | 2024-01-26 | 2024-04-05 | 南京中鑫智电科技有限公司 | On-line monitoring method and system for oil expansion of converter transformer valve side sleeve |
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