Grounding current value monitoring device of oil-immersed transformer

Abstract

The invention discloses a grounding current value monitoring device for an oil-immersed transformer. The grounding current value monitoring device is used for monitoring a grounding current value of a transformer grounding assembly of the oil-immersed transformer. The device comprises a main server, a standby server and a plurality of current detectors, each current detector is arranged at the transformer grounding assembly and is used for measuring a grounding current value of the transformer grounding assembly; a signal receiving end of the main server is connected with a first signal output end of each current detector and is used for acquiring a grounding current value measured by each current detector; the signal receiving end of the standby server is connected with the second signal output end of each current detector and is used for acquiring the grounding current value measured by each current detector; the signal output end of the main server and the signal output end of the standby server are connected with a far-end upper computer so that the grounding current value measured by each current detector can be sent to the far-end upper computer. The device can improve the monitoring efficiency of the grounding current value of the oil-immersed transformer.

Description

Technical Field

[0001] The invention relates to the technical field of power systems, and in particular to a grounding current value monitoring device for an oil-immersed transformer. Background Art

[0002] With the rapid development of the social economy, the demand for electricity has increased. Therefore, it is very important to ensure the stability of the power system. During the operation of the power system, whether the transformer can operate stably is related to whether the power system can operate normally. Therefore, in power production operations, it is necessary to monitor the grounding current of transformers, especially oil-immersed transformers, to monitor whether the transformer is operating normally.

[0003] Currently, when monitoring the grounding current of an oil-immersed transformer, the measuring personnel are required to wear insulating gloves, work clothes and insulating shoes, and clamp a handheld clamp ammeter on the grounding flat iron of the transformer grounding assembly of the oil-immersed transformer to measure the grounding current value, so as to monitor the grounding current value of the oil-immersed transformer. At the same time, the preparation work for the measurement is relatively cumbersome, and there is a certain risk of electric shock in manual monitoring, which leads to too low efficiency in monitoring the grounding current value of the oil-immersed transformer. Summary of the invention

[0004] In view of this, the present application provides a grounding current value monitoring device for an oil-immersed transformer, the main purpose of which is to solve the technical problem of low monitoring efficiency of the grounding current value of the oil-immersed transformer.

[0005] According to a first aspect of the present invention, there is provided a grounding current value monitoring device for an oil-immersed transformer, which is used to monitor the grounding current value of a transformer grounding component of the oil-immersed transformer, the device comprising a main server, a standby server and a plurality of current detectors;

[0006] Each of the current detectors is disposed at the transformer grounding component and is used to measure the grounding current value of the transformer grounding component;

[0007] The signal receiving end of the main server is connected to the first signal output end of each current detector, and is used to obtain the ground current value measured by each current detector;

[0008] The signal receiving end of the standby server is connected to the second signal output end of each current detector, and is used to obtain the ground current value measured by each current detector;

[0009] The signal output end of the active server and the signal output end of the standby server are respectively connected to a remote host computer to send the ground current value measured by each current detector to the host computer.

[0010] Optionally, the standby server and each of the current detectors are interconnected in the form of a ring topology network.

[0011] Optionally, the current detector includes a Hall sensor, a processing unit and a remote communication unit; the Hall sensor is arranged at the transformer grounding component, for measuring the grounding current value of the transformer grounding component; the signal receiving end of the processing unit is connected to the signal output end of the Hall sensor, for receiving the grounding current value; the signal interaction end of the remote communication unit is connected to the first signal interaction end of the processing unit, for obtaining the grounding current value from the processing unit, and sending the grounding current value to the main server and the backup server.

[0012] Optionally, the Hall sensor includes a Hall unit and a signal conversion unit; the Hall unit is arranged at the transformer grounding component, and is used to measure the grounding current value of the transformer grounding component; the signal receiving end of the signal conversion unit is connected to the signal output end of the Hall unit, and is used to obtain the grounding current value, and perform analog-to-digital conversion on the grounding current value to obtain the grounding current value in the form of a digital signal; the signal output end of the signal conversion unit is connected to the signal receiving end of the processing unit, and is used to send the grounding current value to the processing unit.

[0013] Optionally, the current detector further includes a storage unit; a signal interaction end of the storage unit is connected to a second signal interaction end of the processing unit, and is used to store the ground current value.

[0014] Optionally, the current detector further includes a human-computer interaction unit; a signal interaction terminal of the human-computer interaction unit is connected to a third signal interaction terminal of the processing unit, for acquiring the ground current value and displaying the ground current value.

[0015] Optionally, the human-computer interaction unit is a serial port touch screen.

[0016] Optionally, the processing unit is configured to perform the following processing: obtain the grounding current value; compare the grounding current value with a preset grounding current upper limit value to determine whether the grounding current value is greater than or equal to the grounding current upper limit value; if the grounding current value is greater than or equal to the grounding current upper limit value, send a current abnormality alarm to the primary server and the backup server, and control the human-computer interaction unit to issue an alarm prompt message.

[0017] Optionally, the main server and the backup server are respectively configured to perform the following processing: obtain the grounding current value; compare the grounding current value with a preset grounding current upper limit value to determine whether the grounding current value is greater than or equal to the grounding current upper limit value; if the grounding current value is greater than or equal to the grounding current upper limit value, send an alarm prompt message to the host computer.

[0018] Optionally, the device also includes a first wireless communication unit and a second wireless communication unit; the first wireless communication unit is connected to the primary server and is used to establish a communication connection between the primary server and a remote wireless terminal; the second wireless communication unit is connected to the backup server and is used to establish a communication connection between the backup server and a remote wireless terminal.

[0019] The present invention provides a grounding current value monitoring device for an oil-immersed transformer. First, a plurality of current detectors arranged at the transformer grounding assembly of the oil-immersed transformer are used to measure the grounding current value at the transformer grounding assembly of the oil-immersed transformer in real time. Then, the current detector sends the measured grounding current value to the main server and the backup server at the same time. Finally, the main server and the backup server send the measured grounding current value to a remote host computer so that relevant staff can view the grounding current of the oil-immersed transformer at the host computer. The technical solution provided by the present application can measure and monitor the grounding current at the transformer grounding assembly of the oil-immersed transformer in real time, eliminating the process of manually measuring the grounding current. The main server and the backup server form a safety redundancy, so that even if one server fails, the grounding current at the transformer grounding assembly of the oil-immersed transformer can be measured and monitored normally, which significantly improves the monitoring efficiency of the grounding current value of the oil-immersed transformer.

[0020] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0022] Figure 1 A schematic structural diagram of a grounding current value monitoring device for an oil-immersed transformer provided by an embodiment of the present invention is shown;

[0023] Figure 2One of the structural schematic diagrams of a current detector provided by an embodiment of the present invention is shown;

[0024] Figure 3 A second structural schematic diagram of a current detector provided by an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0025] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict.

[0026] Currently, when monitoring the grounding current of an oil-immersed transformer, the measuring personnel need to wear insulating gloves, work clothes, and insulating shoes, and clamp a handheld clamp ammeter on the grounding flat iron of the transformer grounding assembly of the oil-immersed transformer to measure the grounding current value to monitor the grounding current value of the oil-immersed transformer. At the same time, the preparation work for the measurement is relatively cumbersome, and there is a certain risk of electric shock in manual monitoring, resulting in too low efficiency in monitoring the grounding current value of the oil-immersed transformer.

[0027] To solve the above problems, in one embodiment, Figure 1 As shown, a grounding current value monitoring device for an oil-immersed transformer is provided, and the device is used to monitor the grounding current value of a transformer grounding component of an oil-immersed transformer as an example for explanation, wherein the transformer grounding component may be an iron core and a clamp of the oil-immersed transformer; further, the grounding current value monitoring device for the oil-immersed transformer includes a main server 110, a backup server 120 and a plurality of current detectors 130.

[0028] Specifically, each current detector 130 is arranged at the transformer grounding assembly (not shown in the figure) to measure the grounding current value of the transformer grounding assembly; in actual use, the current detector 130 can be arranged at the iron core of the oil-immersed transformer, or the current detector 130 can be arranged at the clamp of the oil-immersed transformer to determine the grounding current value of the grounding current flowing through the iron core and the clamp of the oil-immersed transformer. Here, different current detectors 130 can be arranged at different transformer grounding assemblies of the oil-immersed transformer according to actual needs to measure the grounding current values ​​of different transformer grounding assemblies of the oil-immersed transformer.

[0029] Furthermore, the signal receiving end of the main server 110 is connected to the first signal output end of each current detector 130, so as to obtain the ground current value measured by each current detector 130. The main server 110 and each current detector 130 are connected in a star topology network connection.

[0030] Furthermore, the signal receiving end of the standby server 120 is connected to the second signal output end of each of the current detectors 130 , so as to obtain the ground current value measured by each of the current detectors 130 .

[0031] Furthermore, the signal output end of the main server 110 and the signal output end of the standby server 120 are respectively connected to a remote host computer (not shown in the figure) to send the ground current value measured by each current detector 130 to the remote host computer. The host computer can be a computer terminal used by relevant staff, and the relevant staff can view the ground current value measured by each current detector 130 at the host computer to monitor the ground current value of the oil-immersed transformer. In addition, the host computer can also be a related monitoring system for receiving the ground current value measured by each current detector 130 to monitor the ground current value of the oil-immersed transformer.

[0032] The grounding current value monitoring device for the oil-immersed transformer provided in this embodiment first measures the grounding current value at the transformer grounding component of the oil-immersed transformer in real time through multiple current detectors arranged at the transformer grounding component of the oil-immersed transformer. Then, the current detector sends the measured grounding current value to the main server and the backup server at the same time. Finally, the main server and the backup server send the measured grounding current value to the remote host computer so that the relevant staff can view the grounding current value of the oil-immersed transformer at the host computer. The technical solution provided by this application can measure and monitor the grounding current at the transformer grounding component of the oil-immersed transformer in real time, eliminating the process of manually measuring the grounding current. And the main server and the backup server constitute a safety redundancy, even if one server fails, the grounding current at the transformer grounding component of the oil-immersed transformer can be measured and monitored normally, thereby significantly improving the monitoring efficiency of the grounding current value of the oil-immersed transformer.

[0033] In an optional embodiment, the backup server and each of the current detectors are interconnected in the form of a ring topology network. Specifically, the backup server and each current detector can be used as a network node respectively, and each network node is networked based on a ring topology structure networking method to form a ring topology network. In the embodiment provided by the present application, even if the communication line between the two current detectors is interrupted, it will not affect the data communication between the current detector and the backup server, thereby improving the communication stability of the grounding current value monitoring device of the oil-immersed transformer.

[0034] In an optional embodiment, if Figure 2The current detector 130 includes a Hall sensor 131 , a processing unit 132 and a remote communication unit 133 , wherein the processing unit 132 may be a computing device such as a single chip microcomputer and a digital signal processor.

[0035] Specifically, the Hall sensor 131 is arranged at the transformer grounding component (not shown in the figure) to measure the grounding current value of the transformer grounding component; specifically, the opening of the Hall unit of the Hall sensor 131 can surround the iron core in the opening to measure the current value of the grounding current in the iron core, and the opening of the Hall unit of the Hall sensor 131 can also surround the clamp in the opening to measure the current value of the grounding current in the clamp.

[0036] Further, the signal receiving end of the processing unit 132 is connected to the signal output end of the Hall sensor 131, for receiving the ground current value. Further, the signal interaction end of the remote communication unit 133 is connected to the first signal interaction end of the processing unit 132, for obtaining the ground current value from the processing unit 132, and sending the ground current value to the main server (not shown in the figure) and the backup server (not shown in the figure).

[0037] The embodiment provided in the present application measures the grounding current value of the transformer grounding component based on the Hall sensor, thereby improving the real-time and accuracy of the grounding current value measurement of the transformer grounding component, and the processing unit sends the grounding current value of the transformer grounding component measured by the Hall sensor to the primary server and the backup server via the remote communication unit, thereby improving the monitoring capability of the grounding current value.

[0038] In an optional embodiment, if Figure 3 As shown, the Hall sensor 131 includes a Hall unit 1311 and a signal conversion unit 1312 .

[0039] Specifically, the Hall unit 1311 is disposed at the transformer grounding component (not shown in the figure) and is used to measure the grounding current value of the transformer grounding component.

[0040] Further, the signal receiving end of the signal conversion unit 1312 is connected to the signal output end of the Hall unit 1311, and is used to receive the ground current value, and perform analog-to-digital conversion on the ground current value to obtain the ground current value in the form of a digital signal. Specifically, the ground current value measured by the Hall unit 1311 is sent to the signal conversion unit 1312 in the form of an analog signal. Further, the signal conversion unit 1312 performs analog-to-digital conversion on the received ground current value in the form of an analog signal to obtain the ground current value in the form of a digital signal.

[0041] Further, the signal output end of the signal conversion unit 1312 is connected to the signal receiving end of the processing unit 132, and is used to send the ground current value to the processing unit 132. Here, the signal conversion unit 1312 can also convert the current signal used to characterize the ground current value into a current signal that can be received and processed by the processing unit 132, so that the processing unit 132 can determine the ground current value based on the current signal.

[0042] The embodiment provided in the present application can measure the grounding current value of the transformer grounding component of the oil-immersed transformer based on the Hall unit. The signal conversion unit converts the grounding current value into a signal to obtain a grounding current value that can be received and processed by the processing unit, thereby improving the device's monitoring capability of the grounding current value.

[0043] In an optional embodiment, if Figure 3 As shown, the current detector 130 further includes a storage unit 134 ; wherein the storage unit 134 may be a storage medium such as a flash drive, a hard disk, etc.

[0044] Specifically, the signal interaction end of the storage unit 134 is connected to the second signal interaction end of the processing unit 132 for storing the ground current value. Here, the processing unit 132 can store the ground current value collected by the Hall sensor 131 in the storage unit 134 at every preset time interval, so as to facilitate the subsequent generation of a trend graph of the ground current value of the transformer grounding component based on the ground current values ​​at multiple time points.

[0045] The embodiment provided in the present application can store the grounding current values ​​of the transformer grounding component collected at historical time, facilitate the subsequent collection and corresponding processing of the grounding current values ​​collected at historical time, and improve the functionality of the grounding current value monitoring device of the oil-immersed transformer.

[0046] In an optional embodiment, if Figure 3 As shown, the current detector further includes a human-machine interaction unit 135 ; wherein the human-machine interaction unit 135 may be a serial port touch screen.

[0047] Specifically, the signal interaction end of the human-machine interaction unit 135 is connected to the third signal interaction end of the processing unit 132 to obtain the grounding current and display the grounding current value. Furthermore, the relevant staff can also send a control instruction to the processing unit 132 through the human-machine interaction unit 135 to control the operation process of the current detector 130, and can also view the grounding current value stored in the storage unit 134 and the trend graph of the grounding current value.

[0048] The embodiment provided in the present application can display the information collected by the current detector based on the human-computer interaction unit, and can control the current detector through the human-computer interaction unit, thereby improving the operability of the grounding current value monitoring device of the oil-immersed transformer.

[0049] In an optional embodiment, the processing unit is configured to perform the following processing:

[0050] First, the ground current value is obtained; specifically, the ground current value collected by the Hall sensor can be obtained from the Hall sensor.

[0051] Then, the grounding current value is compared with a preset grounding current upper limit value to determine whether the grounding current value is greater than or equal to the grounding current upper limit value; wherein, the grounding current upper limit value can be a preset judgment value for determining whether the grounding current value of the transformer grounding component of the oil-immersed transformer is abnormal, and its specific value can be determined according to actual conditions.

[0052] Finally, if the ground current value is greater than or equal to the ground current upper limit value, a current abnormality alarm is sent to the active server and the standby server, and the human-computer interaction unit is controlled to send an alarm prompt message.

[0053] Specifically, when the grounding current value is greater than or equal to the grounding current upper limit, a current abnormality alarm is sent to the main server and the backup server, so that the main server and the backup server send a current abnormality alarm to the host computer, so that the relevant staff can know the abnormal situation of the oil-immersed transformer at the host computer. Further, when the grounding current value is greater than or equal to the grounding current upper limit, the processing unit can also control the human-computer interaction unit to send an alarm prompt information to prompt the relevant staff nearby to pay attention to the abnormal situation.

[0054] In the embodiments provided by the present application, the current detector can have a grounding current analysis function. When the grounding current value of the transformer grounding component of the oil-immersed transformer is abnormal, the abnormal situation can be discovered in time and an alarm message can be issued, thereby improving the functionality of the grounding current value monitoring device of the oil-immersed transformer.

[0055] In an optional embodiment, the device also includes a first wireless communication unit and a second wireless communication unit; wherein the first wireless communication unit and the second wireless communication unit can be Global System for Mobile Communications (GSM) modules respectively, which can send data sent from the main server or the backup server to the mobile phones of relevant staff via the mobile communication operator, including alarm information and ground current values, etc.

[0056] Specifically, the first wireless communication unit is connected to the primary server and is used to establish a communication connection between the primary server and a remote wireless terminal; wherein the wireless terminal can be a mobile phone of a relevant staff member. The first wireless communication unit can send the data sent by the primary server to the mobile phone of the relevant staff member via the mobile communication operator, including alarm information and ground current value, etc. Further, the second wireless communication unit is connected to the backup server. Similarly, the second wireless communication unit is used to establish a communication connection between the backup server and a remote wireless terminal.

[0057] The embodiments provided in the present application enable the main server and the backup server to send relevant information such as alarm information to the mobile phones of relevant staff members, thereby enabling the relevant staff members to remotely monitor the oil-immersed transformer.

[0058] In an optional embodiment, the main server and the backup server are respectively configured to perform the following processing: first, obtain the grounding current value; then, compare the grounding current value with the preset grounding current upper limit value to determine whether the grounding current value is greater than or equal to the grounding current upper limit value; finally, if the grounding current value is greater than or equal to the grounding current upper limit value, an alarm prompt message is sent to the host computer. In the embodiment provided by the present application, both the main server and the backup server have a grounding current monitoring and analysis function. When the grounding current value of the transformer grounding component of the oil-immersed transformer is too high, the abnormal situation can be detected in time and an alarm message can be issued, thereby improving the functionality of the grounding current value monitoring device of the oil-immersed transformer.

[0059] The grounding current value monitoring device for an oil-immersed transformer provided in this embodiment can measure and monitor the grounding current at the transformer grounding component of the oil-immersed transformer in real time, and can promptly send an alarm message to relevant staff members when the grounding current is abnormal, and can send the abnormal situation to the mobile phone of the relevant staff members. At the same time, the current detector has a data storage function and an abnormality analysis function, and the current detector also has a human-computer interaction unit, so that the relevant staff members can operate the current detector through the human-computer interaction unit, which significantly improves the monitoring efficiency of the grounding current value of the oil-immersed transformer.

[0060] The above serial numbers of this application are only for description and do not represent the advantages and disadvantages of the implementation scenarios. The above disclosure is only a few specific implementation scenarios of this application, but this application is not limited to them, and any changes that can be thought of by technicians in this field should fall within the scope of protection of this application.

Claims

1. A grounding current value monitoring device for an oil-immersed transformer, used for monitoring the grounding current value of a transformer grounding component of an oil-immersed transformer, characterized in that: The device includes a main server, a backup server and a plurality of current detectors; Each of the current detectors is disposed at the transformer grounding component and is used to measure the grounding current value of the transformer grounding component; The signal receiving end of the main server is connected to the first signal output end of each current detector, and is used to obtain the ground current value measured by each current detector; The signal receiving end of the standby server is connected to the second signal output end of each current detector, and is used to obtain the ground current value measured by each current detector; The signal output end of the active server and the signal output end of the standby server are respectively connected to a remote host computer to send the ground current value measured by each current detector to the host computer.

2. The device according to claim 1, characterized in that The standby server and each current detector are connected to each other in the form of a ring topology network.

3. The device according to claim 1, characterized in that The current detector includes a Hall sensor, a processing unit and a remote communication unit; The Hall sensor is arranged at the transformer grounding component and is used to measure the grounding current value of the transformer grounding component; The signal receiving end of the processing unit is connected to the signal output end of the Hall sensor for receiving the ground current value; The signal interaction end of the remote communication unit is connected to the first signal interaction end of the processing unit, and is used to obtain the ground current value from the processing unit and send the ground current value to the active server and the standby server.

4. The device according to claim 3, characterized in that The Hall sensor includes a Hall unit and a signal conversion unit; The Hall unit is arranged at the transformer grounding component and is used to measure the grounding current value of the transformer grounding component; The signal receiving end of the signal conversion unit is connected to the signal output end of the Hall unit, and is used to obtain the ground current value, and perform analog-to-digital conversion on the ground current value to obtain the ground current value in the form of a digital signal; The signal output end of the signal conversion unit is connected to the signal receiving end of the processing unit, and is used to send the ground current value to the processing unit.

5. The device according to claim 3, characterized in that The current detector also includes a storage unit; The signal interaction end of the storage unit is connected to the second signal interaction end of the processing unit and is used to store the ground current value.

6. The device according to claim 3, characterized in that The current detector also includes a human-computer interaction unit; The signal interaction end of the human-computer interaction unit is connected to the third signal interaction end of the processing unit, and is used to obtain the ground current value and display the ground current value.

7. The device according to claim 6, characterized in that The human-computer interaction unit is a serial port touch screen.

8. The device according to claim 6, characterized in that The processing unit is configured to perform the following processing: Obtaining the ground current value; Comparing the ground current value with a preset ground current upper limit value to determine whether the ground current value is greater than or equal to the ground current upper limit value; If the ground current value is greater than or equal to the ground current upper limit value, a current abnormality alarm is sent to the active server and the standby server, and the human-computer interaction unit is controlled to send an alarm prompt message.

9. The device according to claim 1, characterized in that The active server and the standby server are respectively configured to perform the following processing: Obtaining the ground current value; Comparing the ground current value with a preset ground current upper limit value to determine whether the ground current value is greater than or equal to the ground current upper limit value; If the ground current value is greater than or equal to the ground current upper limit value, an alarm prompt message is sent to the host computer.

10. The device according to claim 1, characterized in that The device also includes a first wireless communication unit and a second wireless communication unit; The first wireless communication unit is connected to the primary server and is used to establish a communication connection between the primary server and a remote wireless terminal; The second wireless communication unit is connected to the standby server and is used to establish a communication connection between the standby server and a remote wireless terminal.

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