阅读说明：本技术 电源变压器次级短路试验的监控装置和方法 (Monitoring device and method for secondary short circuit test of power transformer ) 是由 凌勇 康扬 罗兴涛 刘爽 于 2020-06-24 设计创作，主要内容包括：本发明公开了一种电源变压器次级短路试验的监控装置和方法,装置包括：电流传感器,用于检测电源变压器次级短路试验过程中的电源变压器的次级电流,以获取电源变压器的次级电流的检测值；控制设备,与所述电流传感器连接,用于接收所述电源变压器的次级电流的检测值,并根据所述电源变压器的次级电流的检测值、预设电流下限值和预设电流上限值,生成所述电源变压器的检测结果；人机交互设备,与所述控制设备连接,用于输出所述电源变压器的检测结果,从而在不对电源变压器进行解剖的情况下,实现了自动判断电源变压器是否合格。采用本发明的技术方案,能够提高电源变压器的检测效率。(The invention discloses a monitoring device and a method for a secondary short-circuit test of a power transformer, wherein the device comprises the following steps: 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. By adopting the technical scheme of the invention, the detection efficiency of the power transformer can be improved.)

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.

10. A method for monitoring a power transformer secondary short-circuit test, which is applied to the device for monitoring a power transformer secondary short-circuit test according to any one of claims 1 to 9, the method comprising:

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;

receiving a detection value of the secondary current of the power transformer through a 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;

and outputting the detection result of the power transformer through human-computer interaction equipment.

Technical Field

The invention belongs to the technical field of power transformer tests, and particularly relates to a monitoring device and a monitoring method for a secondary short-circuit test of a power transformer.

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.

Disclosure of Invention

The invention mainly aims to provide a monitoring device and a monitoring method for a secondary short-circuit test of a power transformer, and the monitoring device and the monitoring method are used for solving the problem that the detection efficiency of the power transformer in the prior art is low.

In view of the above problems, the present invention provides a monitoring device for a secondary short circuit test of a power transformer, including:

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.

The invention also provides a monitoring method of a power transformer secondary short-circuit test, which is applied to any one of the monitoring devices of the power transformer secondary short-circuit test, and the method comprises the following steps:

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;

receiving a detection value of the secondary current of the power transformer through a 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;

and outputting the detection result of the power transformer through human-computer interaction equipment.

Compared with the prior art, one or more embodiments in the above scheme can have the following advantages or beneficial effects:

by applying the monitoring device and the method for the secondary short-circuit test of the power transformer, the secondary current of the power transformer is detected by using the current sensor in the secondary short-circuit test process of the power transformer, and after the detection result of the power transformer is generated by the control device 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, so that whether the power transformer is qualified or not is automatically judged under the condition that the power transformer is not dissected. By adopting the technical scheme of the invention, the detection efficiency of the power transformer can be improved.

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, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of 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 power transformer secondary short-circuit test according to the present invention;

FIG. 2 is a schematic structural diagram of another embodiment of a monitoring device for a power transformer secondary short-circuit test according to the present invention;

fig. 3 is a flowchart of an embodiment of a monitoring method for a power transformer secondary short-circuit test according to the present invention.

Detailed Description

The following detailed description of the embodiments of the present invention will be provided with reference to the drawings and examples, so that how to apply the technical means to solve the technical problems and achieve the technical effects can be fully understood and implemented. It should be noted that, as long as there is no conflict, the embodiments and the features of the embodiments of the present invention may be combined with each other, and the technical solutions formed are within the scope of the present invention.