CN214122410U - On-load tap-changer on-line monitoring system - Google Patents
On-load tap-changer on-line monitoring system Download PDFInfo
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- CN214122410U CN214122410U CN202022687389.5U CN202022687389U CN214122410U CN 214122410 U CN214122410 U CN 214122410U CN 202022687389 U CN202022687389 U CN 202022687389U CN 214122410 U CN214122410 U CN 214122410U
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Abstract
The application relates to an on-load tap-changer on-line monitoring system, which comprises an insulating oil monitoring device, an operating state monitoring device and a control device, wherein the control device is connected with the insulating oil monitoring device and the operating state monitoring device; the method comprises the following steps that an insulating oil monitoring device and an operating state monitoring device acquire operating data of the on-load tap-changer; and the control device receives the operation data and carries out on-load tap-changer on-line monitoring based on the operation data. The on-load tap-changer on-line monitoring system collects the operation data of the on-load tap-changer through the insulating oil monitoring device and the operation state monitoring device; and then the control device carries out on-load tap-changer on-line monitoring according to the collected operation data. In the whole monitoring process, the influence of various factors on the running state of the on-load tap-changer is comprehensively considered, and the accuracy of the on-load tap-changer on-line monitoring result is improved.
Description
Technical Field
The application relates to the field of electrical equipment online monitoring equipment, in particular to an on-load tap-changer online monitoring system.
Background
The on-load tap-changer is a voltage regulating device which is operated under the excitation or the load of a transformer and is used for changing the tapping connection position of a transformer winding. In the working process, the on-load tap-changer needs to be frequently operated to adapt to the working requirement of the transformer, the on-load tap-changer operation state is monitored on line, and the on-load tap-changer on-line monitoring method has important significance for guaranteeing the safe operation of a power system.
In a traditional on-load tap-changer on-line monitoring system, a vibration sensor is used for collecting a vibration signal generated when an on-load tap-changer acts, and then a control device is used for judging the running state of the on-load tap-changer according to the vibration signal. In the actual operation process, the vibration signal of the on-load tap-changer may be affected by the external environment, which directly results in the accuracy of the operation state judgment result. Therefore, the traditional on-load tap-changer on-line monitoring system has the defect of inaccurate judgment result.
SUMMERY OF THE UTILITY MODEL
Therefore, an on-load tap-changer online monitoring system is needed to be provided, and accuracy of an on-load tap-changer operation state judgment result is improved.
An on-load tap-changer on-line monitoring system comprises an insulating oil monitoring device, an operating state monitoring device and a control device, wherein the control device is connected with the insulating oil monitoring device and the operating state monitoring device; the insulating oil monitoring device and the running state monitoring device collect running data of the on-load tap-changer; and the control device receives the operation data and carries out on-load tap-changer on-line monitoring based on the operation data.
In one embodiment, the insulating oil monitoring device is a dissolved gas concentration and micro-water monitoring device in insulating oil.
In one embodiment, the device for monitoring the concentration of the dissolved gas in the insulating oil and the trace water comprises an oil-gas separation device and an analysis device; the oil-gas separation device is connected with an on-load tap-changer through an oil pumping pipe; the analysis device is connected with the oil-gas separation device and the on-load tap-changer through an oil pipe, and the analysis device is also connected with the control device.
In one embodiment, the running state monitoring device comprises a gear sensor, a current hall sensor, a vibration sensor, a rotating speed sensor, an oil level sensor, an oil temperature sensor and a motor trigger signal acquisition device which are connected with the control device.
In one embodiment, the current Hall sensor is installed in an operation box of the on-load tap-changer, the oil level sensor is installed at the top of the on-load tap-changer, and the oil temperature sensor and the vibration sensor are installed on a head cover of the on-load tap-changer.
In one embodiment, the control device comprises a data conditioning module and a central processing module, and the data conditioning module is connected with the insulating oil monitoring device, the operating state monitoring device and the central processing module.
In one embodiment, the data conditioning module comprises a data acquisition unit, a serial port unit, a comparison unit and an I/O port, the data acquisition unit is connected with the insulating oil monitoring device and the operating state monitoring device, and the serial port unit, the comparison unit and the I/O port are connected with the operating state monitoring device.
In one embodiment, the control device further comprises a communication module, and the communication module is connected with the central processing module.
In one embodiment, the communication module comprises a network card and a GSM module.
In one embodiment, the main cabinet is further provided with a mounting bracket, and the main cabinet is mounted on a base of the on-load tap-changer through the mounting bracket.
The on-load tap-changer on-line monitoring system collects the operation data of the on-load tap-changer through the insulating oil monitoring device and the operation state monitoring device; and then the control device carries out on-load tap-changer on-line monitoring according to the collected operation data. In the whole monitoring process, data acquisition of various types of parameters is carried out on the on-load tap-changer, and the control device carries out on-load tap-changer on-line monitoring based on the data, so that the influence of various factors on the running state of the on-load tap-changer is considered comprehensively, and the accuracy of the on-load tap-changer on-line monitoring result is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a block diagram of an on-load tap changer on-line monitoring system in one embodiment;
fig. 2 is a block diagram of an on-load tap changer on-line monitoring system in another embodiment;
fig. 3 is a front view of an on-load tap changer on-line monitoring system installation in one embodiment;
fig. 4 is a top view of an on-load tap changer on-line monitoring system installation location in one embodiment;
fig. 5 is a front view of a main cabinet of an on-load tap changer on-line monitoring system in one embodiment;
fig. 6 is a left side view of the main cabinet of the on-load tap-changer on-line monitoring system in one embodiment;
fig. 7 is a top view of an on-load tap changer on-line monitoring system main cabinet in one embodiment;
FIG. 8 is a front view of a mounting bracket according to one embodiment;
FIG. 9 is a left side view of a mounting bracket in one embodiment.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Embodiments of the present application are set forth in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
It is to be understood that "connection" in the following embodiments is to be understood as "electrical connection", "communication connection", and the like if the connected circuits, modules, units, and the like have communication of electrical signals or data with each other.
As used herein, the singular forms "a", "an" and "the" may include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises/comprising," "includes" or "including," etc., specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof. Also, as used in this specification, the term "and/or" includes any and all combinations of the associated listed items.
In one embodiment, referring to fig. 1, an on-load tap changer on-line monitoring system is provided, which includes an insulating oil monitoring device 100, an operation state monitoring device 200, and a control device 300. The control device 300 connects the insulating oil monitoring device 100 and the operating condition monitoring device 200. The insulating oil monitoring device 100 and the operating state monitoring device 200 collect operating data of the on-load tap-changer; the control device 300 receives the operation data and performs on-load tap-changer on-line monitoring based on the operation data.
Specifically, the insulating oil monitoring device 100 and the operating state monitoring device 200 are respectively used for collecting insulating oil monitoring data and operating state monitoring data of the on-load tap-changer. The control device 300 is used for receiving the operation data collected by the insulating oil monitoring device 100 and the operation state monitoring device 200 and performing on-load tap-changer on-line monitoring based on the data. The on-load tap-changer on-line monitoring mode of the control device 300 may be to compare the acquired operation data with corresponding preset threshold values respectively, and obtain an on-load tap-changer on-line monitoring result according to the comparison result; or the obtained operation data can be calculated based on a preset algorithm to obtain an on-load tap-changer online monitoring result.
Common faults of the on-load tap-changer are as follows: the insulation oil impurity increases, the oil seeps, the oil-free switching, the contact is poor, the switch switching time is prolonged or the switching action can not be completed, etc. The fault component and fault mode of the on-load tap-changer comprises: the switch contacts are worn; damage to electrical connectors, connecting wires, and contacts; the sealing ring and the sealing gasket of the switch are subjected to oil leakage; the contact resistance of the switch loop is overlarge; switch transition resistance damage; energy storage spring fatigue, vacuum bubble damage, and the like. The specific process of the control device 300 calculating the acquired operation data based on the preset algorithm to obtain the on-load tap-changer on-line monitoring result is as follows: according to the insulating oil monitoring data, fault diagnosis of the on-load tap-changer is carried out based on a preset algorithm, and fault properties are obtained; according to the running state monitoring data, fault diagnosis of the on-load tap-changer is carried out based on a multi-parameter fault diagnosis algorithm to obtain a fault type; determining a fault component and a fault mode of the on-load tap-changer according to a fault diagnosis result; and finally, carrying out qualitative evaluation on the health state of the on-load tap-changer according to the fault component and the fault mode, and outputting an evaluation result.
The on-load tap-changer on-line monitoring system collects the operation data of the on-load tap-changer through the insulating oil monitoring device and the operation state monitoring device; and then the control device carries out on-load tap-changer on-line monitoring according to the collected operation data. In the whole monitoring process, data acquisition of various types of parameters is carried out on the on-load tap-changer, and the control device carries out on-load tap-changer on-line monitoring based on the data, so that the influence of various factors on the running state of the on-load tap-changer is considered comprehensively, and the accuracy of the on-load tap-changer on-line monitoring result is improved.
In one embodiment, referring to fig. 2, the operation status monitoring device 200 includes a gear position sensor 210, a current hall sensor 220, a vibration sensor 230, a rotation speed sensor 240, an oil level sensor 250, an oil temperature sensor 260, and a motor trigger signal collecting device 270 connected to the control device 300. Wherein the motor trigger signal acquisition device 270 includes a relay. In one embodiment, oil temperature sensor 260 is a P100 temperature sensor. After each operation state monitoring device 200 collects the corresponding signal and performs necessary conditioning, the obtained operation data is sent to the control device 300, and the control device 300 performs online monitoring of the on-load tap-changer according to the operation data.
Specifically, the operation data collected by the operation state monitoring device 200 includes gear position sensor data, motor current data, vibration data, rotation speed data, oil level data, oil temperature data, and trigger signal data. The control device 300 performs fault diagnosis based on a multi-parameter tap changer diagnosis algorithm according to the data reflecting the operation state and the fault condition of the on-load tap changer, so that the current fault information and the potential fault information of the on-load tap changer can be captured in real time, the fault type is determined, and irreplaceable data support is provided for maintenance and state overhaul of the tap changer. The multi-parameter tap changer fault diagnosis algorithm comprises a fault diagnosis algorithm based on preventive tests and confidence protection and/or a fault diagnosis algorithm combining clustering and SVM.
Further, after determining the fault component and the fault mode of the on-load tap-changer according to the fault diagnosis result, current fault information of each component and potential fault information which may occur can be listed. The control device 300 performs the health status evaluation of the on-load tap-changer based on the preset health status evaluation standard according to the fault information, and outputs the evaluation result. The health status assessment result may be expressed by a specific score or a health status grade. For example, different health levels may be represented by A, B, C, D, with health progressively worse from A to D. Wherein class a indicates normal operation of the on-load tap-changer; class B indicates that the on-load tap-changer performance has changed, but can continue to operate for a preset period; the grade C represents that the performance of the on-load tap-changer changes obviously, and the on-load tap-changer can continue to operate at present but cannot maintain the operation of a preset period; class D indicates that the on-load tap changer is not available or may fail in the short term.
Further, the control device 300 evaluates the health status of the on-load tap changer, including: acquiring types and early warning values of corresponding parameters according to the operation data, and carrying out quantitative evaluation on the health state of the on-load tap-changer according to the types and standard values of the parameters; and carrying out qualitative evaluation on the health state of the on-load tap-changer according to the fault component and the fault mode.
In one embodiment, referring to fig. 3 and 4, the current hall sensor is mounted in the operating box of the on-load tap changer, the fuel level sensor is mounted on the top of the on-load tap changer, and the oil temperature sensor and the vibration sensor are mounted on the head cover of the on-load tap changer. Specifically, the current hall sensor 220 is installed in the tap changer, collects the driving motor current in real time in a preset period, calculates an effective value in sections, obtains an average value to obtain motor current data, compares and judges the motor current data with a normal threshold value by the controller 200, and performs fault diagnosis.
In one embodiment, the insulating oil monitoring device is a dissolved gas concentration and micro-water monitoring device in the insulating oil, and is used for detecting the concentration and micro-water content of the dissolved gas in the insulating oil of the on-load tap-changer. Wherein the dissolved gas in the insulating oil comprises H2、CH4、C2H4、C2H6、C2H2And the contents of the gases and the micro water in the insulating oil can be obtained through oil chromatographic analysis.
Specifically, the monitoring data related to the insulating oil can be obtained by analyzing the monitoring data of the insulating oil, and the control device 300 can determine whether the fault is an overheating fault, a discharging fault, or a fault with both discharging and overheating type, and whether the fault is a low-temperature, medium-temperature, or high-temperature overheating fault when the overheating fault is detected by using a preset algorithm, wherein the discharging fault is a high-energy or low-energy discharging fault. The preset algorithm comprises a three-ratio method, an intelligent algorithm based on PSO (Particle swarm optimization), SVM (support vector machines) and/or an intelligent algorithm based on case-based reasoning.
In one embodiment, the dissolved gas concentration and trace water monitoring device in the insulating oil comprises an oil-gas separation device and an analysis device. The oil-gas separation device is connected with an on-load tap-changer through an oil pumping pipe; the analysis device is connected with the oil-gas separation device and the on-load tap-changer through oil pipes, and is also connected with a control device.
Referring to fig. 3, the oil pumping pipe is connected to the switch S pipe for pumping the insulating oil inside the on-load tap changer. The oil pumping pipe sends the pumped insulating oil to an oil-gas separation device in the insulating oil, after oil-gas separation, the analysis device completes analysis of the content of dissolved gas and micro water in the oil, and the analyzed insulating oil is sent back to the interior of the on-load tap-changer change-over switch through an oil return pipe and a switch Q pipe. Through the infinite rapid circulating oil way, the concentration of dissolved gas and the micro-water content in the on-load tap-changer insulating oil can be rapidly monitored in real time.
In an embodiment, with continuing reference to fig. 2, the control device 300 includes a data conditioning module 310 and a central processing module 320, wherein the data conditioning module 310 is connected to the insulating oil monitoring device 100, the operation status monitoring device 200 and the central processing module 320, and is configured to receive the operation data, condition the operation data, and send the conditioned operation data to the central processing module 320. Specifically, the data conditioning module 310 synchronously processes the operation data and sends the processed operation data to the central processing module 320 according to the type of the operation data, or further conditions the data to obtain data meeting the interface protocol of the central processing module 320 and sends the data to the central processing module 320. And then analyzed and judged by the central processing module 320.
In one embodiment, with continuing reference to fig. 2, the data conditioning module 310 includes a data acquisition unit 311, a serial unit 312, a comparison unit 313 and an I/O port 314, the data acquisition unit 311 is connected to the insulating oil monitoring device 100 and the operation status monitoring device 200, and the serial unit 312 is connected to the comparison unit 313 and the I/O port 314 and the operation status monitoring device 200. The data acquisition unit 311 is configured to perform synchronization processing on the operation data and send the operation data to the central processing module 320; the serial port unit 312 is used for performing necessary conversion on the operation data and sending the operation data to the central processing module 320; the comparing unit 313 is used for comparing the trigger signal data acquired by the motor trigger signal acquisition device 270 with the standard data to obtain an electric service life signal of the on-load tap-changer and then sending the electric service life signal to the central processing module 320; the I/O port 314 is used for directly transmitting the trigger signal data acquired by the motor trigger signal acquisition device 270 to the central processing module 320.
In one embodiment, the serial port unit includes an 485/232 serial port conversion unit and a serial port, and the position data sent by the gear position sensor 210 is converted by the 485/232 serial port conversion unit and then sent to the central processing module 320 via the serial port.
In one embodiment, please continue to refer to fig. 2, the control device 300 further includes a communication module 330, and the communication module 330 is connected to the central processing module 320 for implementing communication between the central processing module 320 and the terminal.
Specifically, after the on-load tap-changer on-line monitoring is completed, the central processing module 320 outputs a monitoring result through the communication module 330. Specifically, the monitoring result can be sound, light or combination of sound and light, and can also be characters. When the monitoring result is output in a sound, light or combination of sound and light, the severity of the fault can be represented by different sounds or different colors of light. When the monitoring result is output in a text form, the monitoring result may include a fault component and a fault mode, and may further include a fault diagnosis result and a health evaluation result. The output object of the monitoring result may be a display or a terminal. The terminal may be a server, tablet or handset.
Further, the central processing module 320 may also output corresponding action suggestions for different health status levels through the communication module 330. For example, when the health status grade of the on-load tap-changer is B, action suggestions for enhancing the monitoring strength and frequency can be output, and operation and maintenance departments and related personnel can be notified according to the situation. When the health state grade of the on-load tap-changer is C, a state report and a corrective action can be sent out, a corrective maintenance application is proposed, and the status report and the corrective action are arranged into a working plan; if the further detection result shows that the equipment is stable and has no further degradation trend, the next overhaul can be scheduled to be carried out. When the health state grade of the on-load tap-changer is D, a suggestion of equipment deactivation can be output, and an operation and maintenance department and related personnel are informed to carry out maintenance.
In one embodiment, the communication module 330 includes a network card 331 and a GSM (Global System for Mobile Communications) module 332 to meet different types of communication requirements.
In one embodiment, referring to fig. 5 to 9, the on-load tap-changer on-line monitoring system further includes a main cabinet and a mounting bracket, wherein the main cabinet is mounted on the base of the on-load tap-changer through the mounting bracket. Specifically, in the main body box, a control device 300 and a partial operation state monitoring device 200 are installed. Through the cooperation of mainframe box and installing support, can realize the quick on-the-spot installation of on-load tap-changer on-line monitoring system. Referring to fig. 3, the main cabinet of the on-load tap-changer on-line monitoring system is mounted on the base of the on-load tap-changer through a mounting bracket. After the installation is finished, the main case of the on-load tap-changer on-line monitoring system is positioned below the operating box of the on-load tap-changer.
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 scope of the utility model. 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, which falls 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. An on-load tap-changer on-line monitoring system is characterized by comprising an insulating oil monitoring device, an operating state monitoring device and a control device, wherein the control device is connected with the insulating oil monitoring device and the operating state monitoring device; the insulating oil monitoring device and the running state monitoring device collect running data of the on-load tap-changer; and the control device receives the operation data and carries out on-load tap-changer on-line monitoring based on the operation data.
2. The on-load tap-changer on-line monitoring system of claim 1, wherein the insulating oil monitoring device is a dissolved gas concentration and micro-water monitoring device in insulating oil.
3. The on-line monitoring system for the on-load tap-changer according to claim 2, wherein the monitoring device for the concentration of dissolved gas in the insulating oil and micro-water comprises an oil-gas separation device and an analysis device; the oil-gas separation device is connected with an on-load tap-changer through an oil pumping pipe; the analysis device is connected with the oil-gas separation device and the on-load tap-changer through an oil pipe, and the analysis device is also connected with the control device.
4. The on-load tap-changer on-line monitoring system of claim 2, characterized in that the running state monitoring device comprises a gear sensor, a current hall sensor, a vibration sensor, a rotating speed sensor, an oil level sensor, an oil temperature sensor and a motor trigger signal acquisition device which are connected with the control device.
5. The on-load tap-changer on-line monitoring system of claim 4, wherein the current Hall sensor is installed in an operation box of the on-load tap-changer, the oil level sensor is installed on the top of the on-load tap-changer, and the oil temperature sensor and the vibration sensor are installed on a head cover of the on-load tap-changer.
6. The on-load tap changer on-line monitoring system of claim 1, wherein the control device comprises a data conditioning module and a central processing module, and the data conditioning module is connected with the insulating oil monitoring device, the operating state monitoring device and the central processing module.
7. The on-load tap-changer on-line monitoring system of claim 6, wherein the data conditioning module comprises a data acquisition unit, a serial port unit, a comparison unit and an I/O port, the data acquisition unit is connected with the insulating oil monitoring device and the operating condition monitoring device, and the serial port unit, the comparison unit and the I/O port are connected with the operating condition monitoring device.
8. The on-load tap changer on-line monitoring system of claim 6, wherein the control device further comprises a communication module, the communication module being connected to the central processing module.
9. The on-load tap changer on-line monitoring system of claim 8, wherein the communication module comprises a network card and a GSM module.
10. The on-load tap changer on-line monitoring system of any one of claims 1-9, further comprising a main cabinet and a mounting bracket, wherein the main cabinet is mounted to the base of the on-load tap changer by the mounting bracket.
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| CN202022687389.5U CN214122410U (en) | 2020-11-19 | 2020-11-19 | On-load tap-changer on-line monitoring system |
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| CN202022687389.5U CN214122410U (en) | 2020-11-19 | 2020-11-19 | On-load tap-changer on-line monitoring system |
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