CN216013507U - Based on transformer substation's ground connection impedance data monitoring devices - Google Patents
Based on transformer substation's ground connection impedance data monitoring devices Download PDFInfo
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- CN216013507U CN216013507U CN202122575530.7U CN202122575530U CN216013507U CN 216013507 U CN216013507 U CN 216013507U CN 202122575530 U CN202122575530 U CN 202122575530U CN 216013507 U CN216013507 U CN 216013507U
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- 238000012360 testing method Methods 0.000 claims abstract description 48
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Abstract
The utility model relates to an electric power system technical field is a based on transformer substation's ground connection impedance data monitoring devices, and it includes the control unit, ground connection impedance test module, power supply unit and distal end receiving element, and the A port of ground connection impedance test module and the V port of ground connection impedance test module all are connected with the control unit, and the control unit is connected with ground connection impedance test module and distal end receiving element respectively, and the power supply unit is connected with the control unit and ground connection impedance test module respectively. The utility model discloses a set up the ground connection impedance test module and carry out real-time detection to the ground connection impedance of transformer substation's ground net to the electric energy signal that will detect exports to distal end receiving element through the control unit, thereby the ground connection impedance who acquires the transformer substation's ground net that can be accurate makes the tester can look over the ground connection impedance value at the scene, can look over the ground connection impedance value at the distal end again, has reduced test work volume.
Description
Technical Field
The utility model relates to an electric power system technical field is based on transformer substation's ground connection impedance data monitoring devices.
Background
In recent years, accidents of a plurality of domestic transformer substations are expanded due to lightning strikes, and most of the accidents are related to unqualified grounding grid grounding impedance. Therefore, periodic monitoring of the ground impedance of the earth grid must be enhanced. If the grounding impedance of the grounding grid is tested inaccurately, not only can equipment be damaged, but also unnecessary loss such as mistaken reconstruction of the grounding grid can be caused.
At home, the research on grounding technology at present mainly focuses on the research on corrosion detection devices of grounding grids, the research on grounding impedance testing devices, the research on error analysis devices in the grounding impedance testing process, the research and application of grounding devices for reducing resistance, and the like. With the development, more and more transformer substation grounding device grounding impedance testing work becomes more and more difficult, on one hand, because some new transformer substations are built in places with complex terrain environments and close to mountains and rivers from the economic viewpoint; on the other hand, as the local economy develops, a plurality of buildings are gradually increased around some old substations; the third aspect is that the open-type transformer substation grounding grid has large area; due to the reasons, the testing workload is increased, so that the testing precision of the grounding impedance testing device of the conventional transformer substation grounding grid cannot keep up with the testing precision of the grounding impedance testing device, and the grounding impedance of the grounding device cannot be accurately obtained.
Disclosure of Invention
The utility model provides a based on transformer substation's ground connection impedance data monitoring devices has overcome above-mentioned prior art not enough, and it can effectively be solved because the increase of test work volume makes the ground connection impedance testing arrangement of current transformer substation's ground net have the problem that can not accurately acquire earthing device's ground connection impedance.
The technical scheme of the utility model is realized through following measure: the utility model provides a based on transformer substation's ground impedance data monitoring devices, includes the control unit, ground impedance test module, power supply unit and far-end receiving element, and ground impedance test module's A port and ground impedance test module's V port all are connected with the control unit, and the control unit is connected with ground impedance test module and far-end receiving element respectively, and the power supply unit is connected with the control unit and ground impedance test module respectively.
The following are further optimization or/and improvement of the technical scheme of the utility model:
the control unit is respectively connected with the ground pile current A end body and the ground pile voltage V end body.
The power supply unit can comprise an external power supply and a voltage conversion module, the external power supply is connected with the voltage conversion module, and the voltage conversion module is respectively connected with the control unit and the grounding impedance test module.
The remote receiving unit can comprise a wireless communication module and a remote display module, and the wireless communication module is respectively connected with the control unit and the remote display module.
The device also comprises an alarm unit which is connected with the control unit.
The utility model discloses a set up the ground connection impedance test module and carry out real-time detection to the ground connection impedance of transformer substation's ground net to the electric energy signal that will detect exports to distal end receiving element through the control unit, thereby the ground connection impedance who acquires the transformer substation's ground net that can be accurate makes the tester can look over the ground connection impedance value at the scene, can look over the ground connection impedance value at the distal end again, has reduced test work volume.
Drawings
Fig. 1 is a schematic circuit diagram of an embodiment of the present invention.
Detailed Description
The utility model discloses do not receive the restriction of following embodiment, can be according to the utility model discloses a technical scheme and actual conditions determine concrete implementation.
The invention will be further described with reference to the following examples and drawings:
as shown in fig. 1, the substation-based ground impedance data monitoring device includes a control unit, a ground impedance testing module, a power supply unit, and a remote receiving unit, where an a port of the ground impedance testing module and a V port of the ground impedance testing module are both connected to the control unit, the control unit is connected to the ground impedance testing module and the remote receiving unit, and the power supply unit is connected to the control unit and the ground impedance testing module.
The working process of the utility model is as follows: before the grounding impedance test, firstly, determining a grounding network impedance detection point to be measured according to the requirements of a transformer substation and the field condition, connecting an E port of a grounding impedance test module with a fixed grounding body of the transformer substation grounding network to be measured (generally, selecting two points of the fixed grounding body of the transformer substation grounding network to be measured to measure), detecting the impedance of the transformer substation grounding network in real time by the grounding impedance test module, displaying the detected grounding impedance, and facilitating the direct viewing of field testers;
the grounding impedance test module can be a known grounding impedance tester, and is used for measuring the real-time grounding impedance of a transformer substation grounding network and outputting an electric energy signal in the test process to the control unit, wherein the electric energy signal comprises a voltage signal, a current signal and a grounding impedance signal; the control unit can be an existing known ARM processor, and functions as: 1. the device is used for receiving the electric energy signal output by the grounding impedance test module and outputting the electric signal to the remote receiving unit; 2. outputting a current signal and a voltage signal; 3. and the control unit compares the received grounding impedance signal with a grounding area impedance threshold value (which is set in the control unit in advance) corresponding to the transformer substation grounding grid to be measured, and if the grounding area impedance value corresponding to the transformer substation grounding grid to be measured is greater than the impedance threshold value of the corresponding grounding area, the control unit outputs an alarm signal to the remote display unit for storage and display, so that a tester is prompted conveniently.
To sum up the utility model discloses a set up ground connection impedance test module and carry out real-time detection to the ground connection impedance of transformer substation's ground net to the electric energy signal that will detect exports to distal end receiving element through the control unit, thereby the ground connection impedance who acquires the transformer substation's ground net that can be accurate makes the tester can look over the ground connection impedance value at the scene, can look over the ground connection impedance value at the distal end again, has reduced test work volume.
The transformer substation grounding impedance data-based monitoring device can be further optimized or/and improved according to actual needs:
as shown in fig. 1, the system further comprises a ground pile current a terminal body and a ground pile voltage V terminal body, and the control unit is respectively connected with the ground pile current a terminal body and the ground pile voltage V terminal body.
The utility model discloses when carrying out the ground resistance test, at first be with ground stake electric current A end body and ground stake voltage V end body be same straight line respectively with the transformer substation's ground net and bury underground, and be connected the control unit with ground stake electric current A end body and ground stake voltage V end body respectively, the control unit exports voltage signal and current signal to ground stake electric current A end body and ground stake voltage V end body respectively, the staff records the current value of ground stake electric current A end body and the magnitude of voltage of ground stake voltage V end body through the universal meter, and obtain the resistance value of the transformer substation's ground net that needs the measurement through magnitude of voltage and current value calculation, the test of the ground resistance of being convenient for from this.
As shown in fig. 1, the power supply unit includes an external power supply and a voltage conversion module, the external power supply is connected to the voltage conversion module, and the voltage conversion module is connected to the control unit and the ground impedance test module, respectively.
The voltage conversion module is used for converting 220V power input by an external power supply into 12V safe voltage and supplying power to the grounding impedance test module and the control unit, so that overlarge voltage is avoided, and potential safety hazards are avoided.
As shown in fig. 1, the remote receiving unit includes a wireless communication module and a remote display module, and the wireless communication module is connected to the control unit and the remote display module respectively.
The wireless communication module can be a conventional well-known GPRS wireless communication module and is used for connecting the control unit with the remote display module; the far-end display module can be an upper computer, a mobile phone, a tablet and the like, and is used for displaying and storing the electric energy signal output by the control unit, so that the electric energy signal is convenient to check.
As shown in the attached figure 1, the device also comprises an alarm unit, and the alarm unit is connected with the control unit.
The alarm unit can be a known audible and visual alarm; the control unit compares the received grounding impedance signal with a grounding area impedance threshold value (which is set in the control unit in advance) corresponding to the transformer substation grounding grid to be measured, if the grounding area impedance value corresponding to the transformer substation grounding grid to be measured is larger than the impedance threshold value of the corresponding grounding area, the control unit outputs a control signal to the alarm unit to enable the alarm unit to give out sound and light for alarming, and meanwhile, the control unit outputs the alarm signal to the remote display unit for storage and display, so that a tester is prompted conveniently.
Above technical feature constitutes the utility model discloses an embodiment, it has stronger adaptability and implements the effect, can increase and decrease unnecessary technical feature according to actual need, satisfies the demand of different situation.
Claims (8)
1. The utility model provides a based on transformer substation's ground impedance data monitoring devices, its characterized in that includes the control unit, ground impedance test module, power supply unit and far-end receiving element, and ground impedance test module's A port and ground impedance test module's V port all are connected with the control unit, and the control unit is connected with ground impedance test module and far-end receiving element respectively, and the power supply unit is connected with the control unit and ground impedance test module respectively.
2. The substation-based ground impedance data monitoring device according to claim 1, further comprising a ground pile current A end body and a ground pile voltage V end body, wherein the control unit is respectively connected with the ground pile current A end body and the ground pile voltage V end body.
3. The substation grounding impedance data monitoring device according to claim 1 or 2, wherein the power supply unit comprises an external power supply and a voltage conversion module, the external power supply is connected with the voltage conversion module, and the voltage conversion module is respectively connected with the control unit and the grounding impedance testing module.
4. The substation-based ground impedance data monitoring device according to claim 1 or 2, wherein the remote receiving unit comprises a wireless communication module and a remote display module, and the wireless communication module is respectively connected with the control unit and the remote display module.
5. The substation-based ground impedance data monitoring device according to claim 3, wherein the remote receiving unit comprises a wireless communication module and a remote display module, and the wireless communication module is respectively connected with the control unit and the remote display module.
6. The substation ground impedance based data monitoring device according to claim 1, 2 or 5, further comprising an alarm unit, wherein the alarm unit is connected with the control unit.
7. The substation-based ground impedance data monitoring device according to claim 3, further comprising an alarm unit, wherein the alarm unit is connected with the control unit.
8. The substation-based ground impedance data monitoring device according to claim 4, further comprising an alarm unit, wherein the alarm unit is connected with the control unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122575530.7U CN216013507U (en) | 2021-10-26 | 2021-10-26 | Based on transformer substation's ground connection impedance data monitoring devices |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122575530.7U CN216013507U (en) | 2021-10-26 | 2021-10-26 | Based on transformer substation's ground connection impedance data monitoring devices |
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| Publication Number | Publication Date |
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| CN216013507U true CN216013507U (en) | 2022-03-11 |
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| CN202122575530.7U Active CN216013507U (en) | 2021-10-26 | 2021-10-26 | Based on transformer substation's ground connection impedance data monitoring devices |
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2021
- 2021-10-26 CN CN202122575530.7U patent/CN216013507U/en active Active
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