CN212391599U - Monitoring device for secondary short circuit test of power transformer - Google Patents
Monitoring device for secondary short circuit test of power transformer Download PDFInfo
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- CN212391599U CN212391599U CN202021210121.6U CN202021210121U CN212391599U CN 212391599 U CN212391599 U CN 212391599U CN 202021210121 U CN202021210121 U CN 202021210121U CN 212391599 U CN212391599 U CN 212391599U
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Abstract
The utility model discloses a monitoring device of power transformer secondary short circuit test, the device includes: the current sensor is used for detecting the secondary current of the power transformer in the secondary short-circuit test process of the power transformer so as to obtain the detection value of the secondary current of the power transformer; the control equipment is connected with the current sensor and used for receiving a detection value of the secondary current of the power transformer and generating a detection result of the power transformer according to the detection value of the secondary current of the power transformer, a lower limit value of a preset current and an upper limit value of the preset current; and the human-computer interaction equipment is connected with the control equipment and used for outputting the detection result of the power transformer, so that whether the power transformer is qualified or not is automatically judged under the condition that the power transformer is not dissected. Adopt the technical scheme of the utility model, can improve power transformer's detection efficiency.
Description
Technical Field
The utility model belongs to the technical field of power transformer is experimental, concretely relates to power transformer secondary short circuit test's monitoring device.
Background
The power transformer is a soft magnetic electromagnetic element, has the functions of power transmission, voltage transformation and insulation isolation, is widely applied to power supply technology and power electronic technology, and is almost used in all electronic products, and in order to avoid the phenomenon that the abnormity is uncontrollable due to short circuit or overload of the secondary side of the power transformer, the power transformer is internally provided with a protection device (such as a fuse link, a recoverable safety device and the like). Under abnormal conditions, the primary power supply can be cut off in time.
At present, a primary side is generally connected with a rated voltage and a rated frequency, a secondary side is in short circuit for a long time, and a secondary side short circuit test is carried out on a power transformer so as to detect whether the power transformer meets the production and use requirements. However, in the prior art, after the power transformer completes the secondary short circuit test, a tester dissects the transformer and can determine whether the power transformer is qualified by observing whether the protection device is abnormal, so that the detection efficiency of the power transformer is low.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a power transformer secondary short circuit test's monitoring device to solve among the prior art power transformer's the lower problem of detection efficiency ratio.
To the above problem, the utility model provides a power transformer secondary short circuit test's monitoring device, include:
the current sensor is used for detecting the secondary current of the power transformer in the secondary short-circuit test process of the power transformer so as to obtain the detection value of the secondary current of the power transformer;
the control equipment is connected with the current sensor and used for receiving a detection value of the secondary current of the power transformer and generating a detection result of the power transformer according to the detection value of the secondary current of the power transformer, a lower limit value of a preset current and an upper limit value of the preset current;
and the human-computer interaction equipment is connected with the control equipment and used for outputting the detection result of the power transformer.
Further, in the above monitoring apparatus for a power transformer secondary short-circuit test, the control device includes:
the analog-to-digital converter is connected with the current sensor and used for receiving the detection value of the secondary current of the power transformer sent by the current sensor and carrying out analog-to-digital conversion on the detection value of the secondary current of the power transformer to obtain the converted detection value of the secondary current of the power transformer;
and the microcontroller is connected with the analog-to-digital converter and the human-computer interaction device, and is used for receiving the converted detection value of the secondary current of the power transformer sent by the analog-to-digital converter and generating the detection result according to the converted detection value of the secondary current of the power transformer, the preset current lower limit value and the preset current upper limit value.
Furthermore, in the monitoring device for the power transformer secondary short-circuit test, the number of the current sensors is multiple; the number of the analog-to-digital converters is 1; the monitoring device also comprises control switches corresponding to the current sensors one by one;
each control switch is connected with the microcontroller, the analog-to-digital converter and the corresponding current sensor, and is switched on or off under the control of the microcontroller, so that the acquired detection value of the secondary current of the power transformer can be sent to the analog-to-digital converter when the corresponding control switch is switched on.
Further, in the monitoring device for the power transformer secondary short-circuit test, the control switch is a relay.
Further, the above-mentioned monitoring device for power transformer secondary short circuit test still includes:
and the alarm device is connected with the microcontroller and used for generating and outputting an alarm signal when the microcontroller judges that the power transformer is abnormal according to the detection result of the power transformer.
Further, the above-mentioned monitoring device for power transformer secondary short circuit test still includes:
and the timer is connected with the microcontroller and used for counting the abnormal accumulated time length of the power transformer and sending the accumulated time length to the man-machine interaction mechanism through the microcontroller so as to enable the man-machine interaction mechanism to output the accumulated time length.
Further, the above-mentioned monitoring device for power transformer secondary short circuit test still includes:
and the monitoring terminal is connected with the human-computer interaction equipment and is used for backing up the detection value of the secondary current of the power transformer and the detection result of the power transformer, which are acquired by the human-computer interaction equipment from the control equipment.
Further, in the monitoring device for the power transformer secondary short circuit test, the monitoring terminal is connected with the human-computer interaction device in a wireless/wired manner.
Further, in the monitoring device for the power transformer secondary short circuit test, the human-computer interaction device is a touch screen.
Compared with the prior art, one or more embodiments in the above scheme can have the following advantages or beneficial effects:
use the utility model discloses a monitoring device of power transformer secondary short circuit test, in power transformer secondary short circuit test process, utilize current sensor to detect power transformer's secondary electric current, and by controlgear, according to power transformer's secondary electric current's detected value, predetermine the electric current lower limit value and predetermine the electric current upper limit value, after generating power transformer's testing result, via human-computer interaction equipment output power transformer's testing result, thereby under the condition of not dissecting power transformer, whether automatic judgement power transformer is qualified has been realized. Adopt the technical scheme of the utility model, can improve power transformer's detection efficiency.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, together with the description of embodiments of the invention, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of an embodiment of a monitoring device for a secondary short-circuit test of a power transformer according to the present invention;
fig. 2 is a schematic structural diagram of another embodiment of the monitoring device for the secondary short-circuit test of the power transformer according to the present invention;
fig. 3 is a flowchart of an embodiment of a monitoring method for a secondary short circuit test of a power transformer according to the present invention.
Detailed Description
The following detailed description will be made with reference to the accompanying drawings and examples, so as to solve the technical problems by applying technical means to the present invention, and to fully understand and implement the technical effects of the present invention. It should be noted that, as long as no conflict is formed, the embodiments and the features in the embodiments of the present invention may be combined with each other, and the technical solutions formed are all within the scope of the present invention.
Example one
For the above-mentioned technical problem who exists among the solution prior art, the embodiment of the utility model provides a monitoring device of power transformer secondary short circuit test.
Fig. 1 is the structural schematic diagram of an embodiment of the monitoring device for the power transformer secondary short circuit test of the present invention, as shown in fig. 1, the monitoring device for the power transformer secondary short circuit test of the present embodiment may include a current sensor 10, a control device 11 and a human-computer interaction device 12. Wherein, the current sensor 10, the control device 11 and the human-computer interaction device 12 are connected in sequence.
In this embodiment, in the process of performing the secondary short-circuit test of the power transformer, the current sensor 10 may be used to detect the secondary current of the power transformer in the process of performing the secondary short-circuit test of the power transformer, so as to obtain a detected value of the secondary current of the power transformer, and send the obtained detected value of the secondary current of the power transformer to the control device 11, and after receiving the detected value of the secondary current of the power transformer, the control device 11 may generate a detection result of the power transformer according to the detected value of the secondary current of the power transformer, the preset current lower limit value, and the preset current upper limit value. For example, the detected value of the secondary current of the power transformer is between the lower limit value of the preset current and the upper limit value of the preset current, which indicates that the protection device of the power transformer is not abnormal, and the power transformer is qualified, otherwise, the detected value of the secondary current of the power transformer is smaller than the lower limit value of the preset current, or the detected value of the secondary current of the power transformer is larger than the upper limit value of the preset current, which indicates that the protection device of the power transformer is possibly abnormal, and the power transformer is unqualified. After the control device 11 obtains the detection result of the power transformer, the detection result of the power transformer can be output through the human-computer interaction device 12, so that an experimenter can directly know whether the power transformer is qualified or not according to the detection result of the power transformer, and the power transformer does not need to be dissected after the experiment is completed.
In the monitoring device for the secondary short-circuit test of the power transformer in the embodiment, in the process of the secondary short-circuit test of the power transformer, the secondary current of the power transformer is detected by using the current sensor 10, and after the detection result of the power transformer is generated by the control device 11 according to the detection value of the secondary current of the power transformer, the lower limit value of the preset current and the upper limit value of the preset current, the detection result of the power transformer is output by the human-computer interaction device 12, so that whether the power transformer is qualified or not is automatically judged without dissecting the power transformer. Adopt the technical scheme of the utility model, can improve power transformer's detection efficiency.
Example two
Fig. 2 is the schematic structural diagram of another embodiment of the monitoring device for the secondary short circuit test of the power transformer of the present invention, as shown in fig. 2, the monitoring device for the secondary short circuit test of the power transformer of the present embodiment is further described in more detail on the basis of the above embodiment of the present invention.
As shown in fig. 2, in the monitoring apparatus for the power transformer secondary short-circuit test of the present embodiment, the control device 11 includes an analog-to-digital converter 111 and a microcontroller 112. The analog-to-digital converter 111 is connected with the current sensor 10, and the analog-to-digital converter 111 and the human-machine interaction device 12 are respectively connected with the microcontroller 112.
The analog-to-digital converter 111 is configured to receive the detected value of the secondary current of the power transformer sent by the current sensor 10, and perform analog-to-digital conversion on the detected value of the secondary current of the power transformer to obtain a converted detected value of the secondary current of the power transformer; the microcontroller 112 is configured to receive the converted detected value of the secondary current of the power transformer sent by the analog-to-digital converter 111, generate a detection result of the power transformer according to the converted detected value of the secondary current of the power transformer, the preset current lower limit value, and the preset current upper limit value, and send the generated detection result of the power transformer to the human-computer interaction device 12.
In practical applications, a plurality of power transformers are usually subjected to secondary short-circuit tests, and therefore, in the present embodiment, the number of the current sensors 10 is plural. In order to save cost, in this embodiment, the number of the analog-to-digital converters 111 is preferably 1; the monitoring device for the power transformer secondary short-circuit test of the embodiment further comprises a control switch 13 corresponding to each current sensor 10. Each current sensor 10 is connected to an analog-to-digital converter 111 via a corresponding control switch 13, each control switch 13 also being connected to a microcontroller 112. Among them, the control switch 13 is preferably a relay.
In this embodiment, the microcontroller 112 may control each control switch 13 in a time-sharing cycle, so that each control switch 13 is turned on or off under the control of the microcontroller 112, so that each current sensor 10 can send the acquired detected value of the secondary current of the power transformer to the analog-to-digital converter 111 when the corresponding control switch 13 is turned on, and thus, monitoring of all power transformers can be completed by only providing one analog-to-digital converter 111.
The monitoring device for the power transformer secondary short circuit test further comprises an alarm device. The alarm device is connected to the microcontroller 112. When the microcontroller 112 determines that there is an abnormality in the power transformer according to the detection result of the power transformer, the alarm device may generate and output an alarm signal.
In practical application, when the microcontroller 112 determines that the power transformer is abnormal according to the detection result of the power transformer, the abnormal power transformer can be distinguished, so that the experimenter can visually see the abnormal information when the human-computer interaction device outputs the detection result of the power transformer. In addition, the microcontroller 112 can also distinguish and process the abnormal recovery information, so that the tester can clearly and intuitively see various information on the alarm interface of the human-computer interaction device.
The monitoring device for the power transformer secondary short circuit test in the embodiment further comprises a timer. The timer is connected to the microcontroller 112. The timer is used for counting the accumulated time length of the power transformer when the power transformer is abnormal, and sending the accumulated time length to the human-computer interaction mechanism through the microcontroller 112, so that the human-computer interaction mechanism outputs the accumulated time length.
In a specific implementation process, in order to monitor a test process of a power transformer secondary short-circuit test and trace test data, in this embodiment, the control device 11 may send the detected value of the secondary current of the power transformer and the detected result of the power transformer to the human-computer interaction device 12 after receiving the detected value of the secondary current of the power transformer and generating the detected result of the power transformer, and the human-computer interaction device 12 records and outputs the detected value of the secondary current of the source transformer and the detected result of the power transformer.
In practical application, in order to avoid that an experimenter manually records a detected value of the secondary current of the source transformer and a detected result of the power transformer, as shown in fig. 2, the monitoring device for the power transformer secondary short-circuit test of the embodiment further includes a monitoring terminal 14. The monitoring terminal 14 is connected with the human-computer interaction device 12, for example, the monitoring terminal 14 is connected with the human-computer interaction device 12 in a wireless/wired mode. In this way, the human-computer interaction device 12 may transmit the detected value of the secondary current of the source transformer and the detection result of the power transformer to the monitoring terminal 14, so that the detected value of the secondary current of the source transformer and the detection result of the power transformer are backed up by the monitoring terminal 14.
Specifically, in this embodiment, the human-computer interaction device 12 is preferably a touch screen, and can record data (a detected value of a secondary current of a power transformer and a detected result of the power transformer) in an experimental process by a system configuration data sampling function during a touch screen programming, add a historical data display plug-in on an interface for displaying and searching, use a print backup function of the touch screen, backup a historical record generated by the touch screen through network parameter configuration, and generate an excel table with a format consistent with that of the historical record of the touch screen at a computer server side to realize paperless inspection.
On one hand, the monitoring device for the secondary short circuit test of the power transformer can automatically collect and monitor the secondary short circuit test instead of manual operation inspection, the detection value of the secondary current of the power transformer can be measured in a non-contact mode, the uncertainty of online real-time measurement in the process point inspection is small, the reliability of the tested data is high, and the timeliness of problem finding is high; on the other hand, the analog quantity channels are circularly switched in a time-sharing mode by using the relays for monitoring, so that the investment cost is greatly saved compared with the condition that each station corresponds to one analog quantity channel for monitoring; on the other hand, the data in the secondary short-circuit test process of the power transformer generates a historical record, so that the traceability of the data is realized; moreover, data can be backed up to the designated monitoring terminal 14 through the network, so that data informatization is realized, manual copying of detection results and single input operation are not needed, and workload is reduced.
EXAMPLE III
Fig. 3 is a flowchart of an embodiment of the monitoring method for the secondary short circuit test of the power transformer of the present invention, wherein the monitoring method for the secondary short circuit test of the power transformer is applied to the monitoring device for the secondary short circuit test of the power transformer of the above embodiment. As shown in fig. 3, the method for monitoring the secondary short-circuit test of the power transformer in this embodiment may specifically include the following steps:
300. detecting the secondary current of the power transformer in the secondary short-circuit test process of the power transformer through a current sensor to obtain the detection value of the secondary current of the power transformer;
301. receiving a detection value of a secondary current of the power transformer through the control device, and generating a detection result of the power transformer according to the detection value of the secondary current of the power transformer, a lower limit value of a preset current and an upper limit value of the preset current;
302. and outputting the detection result of the power transformer through the human-computer interaction equipment.
The method of the foregoing embodiment is used to implement the corresponding apparatus in the foregoing embodiment, and has the beneficial effects of the corresponding apparatus embodiment, which are not described herein again.
Example four
In order to solve the above technical problem existing in the prior art, an embodiment of the present invention provides a storage medium.
The embodiment of the utility model provides a storage medium has the computer program stored on it, and the computer program realizes the step of above-mentioned method when being executed by the treater.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
It should be noted that, in the description of the present invention, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, in the description of the present invention, "a plurality" means at least two unless otherwise specified.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present invention includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present invention.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, each functional unit in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although the embodiments of the present invention have been disclosed, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be apparent to persons skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (9)
1. A monitoring device for a power transformer secondary short circuit test is characterized by comprising:
the current sensor is used for detecting the secondary current of the power transformer in the secondary short-circuit test process of the power transformer so as to obtain the detection value of the secondary current of the power transformer;
the control equipment is connected with the current sensor and used for receiving a detection value of the secondary current of the power transformer and generating a detection result of the power transformer according to the detection value of the secondary current of the power transformer, a lower limit value of a preset current and an upper limit value of the preset current;
and the human-computer interaction equipment is connected with the control equipment and used for outputting the detection result of the power transformer.
2. The power transformer secondary short-circuit test monitoring device according to claim 1, wherein the control device comprises:
the analog-to-digital converter is connected with the current sensor and used for receiving the detection value of the secondary current of the power transformer sent by the current sensor and carrying out analog-to-digital conversion on the detection value of the secondary current of the power transformer to obtain the converted detection value of the secondary current of the power transformer;
and the microcontroller is connected with the analog-to-digital converter and the human-computer interaction device, and is used for receiving the converted detection value of the secondary current of the power transformer sent by the analog-to-digital converter and generating the detection result according to the converted detection value of the secondary current of the power transformer, the preset current lower limit value and the preset current upper limit value.
3. The monitoring device for the power transformer secondary short-circuit test according to claim 2, wherein the number of the current sensors is plural; the number of the analog-to-digital converters is 1; the monitoring device also comprises control switches corresponding to the current sensors one by one;
each control switch is connected with the microcontroller, the analog-to-digital converter and the corresponding current sensor, and is switched on or off under the control of the microcontroller, so that the acquired detection value of the secondary current of the power transformer can be sent to the analog-to-digital converter when the corresponding control switch is switched on.
4. The power transformer secondary short-circuit test monitoring device according to claim 3, wherein the control switch is a relay.
5. The apparatus for monitoring a power transformer secondary short-circuit test as claimed in claim 2, further comprising:
and the alarm device is connected with the microcontroller and used for generating and outputting an alarm signal when the microcontroller judges that the power transformer is abnormal according to the detection result of the power transformer.
6. The apparatus for monitoring a power transformer secondary short-circuit test as claimed in claim 5, further comprising:
and the timer is connected with the microcontroller and used for counting the abnormal accumulated time length of the power transformer and sending the accumulated time length to the man-machine interaction mechanism through the microcontroller so as to enable the man-machine interaction mechanism to output the accumulated time length.
7. The apparatus for monitoring a power transformer secondary short-circuit test as claimed in claim 1, further comprising:
and the monitoring terminal is connected with the human-computer interaction equipment and is used for backing up the detection value of the secondary current of the power transformer and the detection result of the power transformer, which are acquired by the human-computer interaction equipment from the control equipment.
8. The monitoring device for the power transformer secondary short-circuit test as claimed in claim 7, wherein the monitoring terminal is connected with the human-computer interaction device in a wireless/wired manner.
9. The monitoring device for the power transformer secondary short-circuit test according to claim 1, wherein the human-computer interaction device is a touch screen.
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| CN202021210121.6U CN212391599U (en) | 2020-06-24 | 2020-06-24 | Monitoring device for secondary short circuit test of power transformer |
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| CN202021210121.6U CN212391599U (en) | 2020-06-24 | 2020-06-24 | Monitoring device for secondary short circuit test of power transformer |
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