CN114295889A - Arrester counting assembly that discharges - Google Patents
Arrester counting assembly that discharges Download PDFInfo
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- CN114295889A CN114295889A CN202111461887.0A CN202111461887A CN114295889A CN 114295889 A CN114295889 A CN 114295889A CN 202111461887 A CN202111461887 A CN 202111461887A CN 114295889 A CN114295889 A CN 114295889A
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Abstract
The invention discloses a lightning arrester discharge counting device, which comprises: the lightning arrester transient state current acquisition module, the current comparison module and the main control module; the lightning arrester transient current acquisition module is connected with the current comparison module, and the current comparison module is connected with the main control module; the lightning arrester transient current acquisition module is used for acquiring the transient current amplitude value flowing through the lightning arrester; the current comparison module is used for comparing the transient current amplitude with a preset arrester action current threshold; and the main control module is used for adding 1 to the current arrester discharge count value when the transient current amplitude is greater than the arrester action current threshold value. By implementing the method, the accuracy of the discharge counting of the lightning arrester can be improved.
Description
Technical Field
The invention relates to the technical field of lightning arresters, in particular to a lightning arrester discharge counting device.
Background
The lightning invasion wave along the power transmission line is one of main reasons threatening the safe operation of equipment in the transformer substation, the line side lightning arrester is the main defense line of the lightning invasion wave, the action condition of the line side lightning arrester becomes the first-hand data essential in the lightning stroke fault analysis and overvoltage protection configuration optimization strategy of the transformer substation equipment, and particularly, the 'whether the lightning arrester acts' is often the most basic information.
The overvoltage protection performance of the lightning arrester is based on the nonlinear volt-ampere characteristic, the lightning arrester works in a low current linear region presenting higher resistance when in normal operation, and under the action of overvoltage, the characteristic of the lightning arrester enters a nonlinear region from the linear region, presents lower resistance and flows larger current, so that the overvoltage is limited; generally, the operating point at 1mA current is often regarded as an inflection point of a linear region to a nonlinear region, and is called a reference current and a reference voltage, and accordingly, the reference current is known as an indicator of the action of the lightning arrester.
In the prior art, a mechanical discharge counter is generally connected in series at a low-voltage end of an arrester to enter the ground to identify the action condition of the arrester, but the mechanical discharge counter collects the current flowing through the arrester and adopts a capacitor energy storage mode, because the reference current (1mA) of the arrester is too small and is far insufficient to drive an action mechanism of the arrester counter, the action of the arrester recorded by the counter actually corresponds to a working point corresponding to a larger current (50A) capable of driving the mechanical action mechanism, that is, when the action of the arrester is identified by adopting the existing mechanical discharge counter, the current actually flowing through the arrester is already larger (more than 50A), and when the arrester is in shallow action (more than 50A), the counter does not react; therefore, the problem of inaccurate counting exists when the existing mechanical discharge counter is used for carrying out discharge counting on the lightning arrester. On the other hand, in the case of a dense lightning strike with a short time interval (within 1 s), the existing mechanical discharge counter can only be recorded as 1 time because the energy storage capacitor does not act in time, and the action condition of the lightning arrester in the process of repeated (multiple) lightning strikes cannot be recorded.
Disclosure of Invention
The embodiment of the invention provides a discharge counting device which can improve the accuracy of a discharge counting value of an arrester.
The embodiment of the invention provides a lightning arrester discharge counting device, which comprises a lightning arrester transient current acquisition module, a current comparison module and a main control module, wherein the lightning arrester transient current acquisition module is connected with the current comparison module; the lightning arrester transient current acquisition module is connected with the current comparison module, and the current comparison module is connected with the main control module;
the lightning arrester transient current acquisition module is used for acquiring the transient current amplitude value flowing through the lightning arrester;
the current comparison module is used for comparing the transient current amplitude with a preset arrester action current threshold;
and the main control module is used for adding 1 to the current arrester discharge count value when the transient current amplitude is greater than the arrester action current threshold value.
Further, the action current threshold of the lightning arrester is 1 mA.
Further, the device also comprises a storage module; the storage module is used for storing the discharge count value of the lightning arrester.
Further, the system also comprises a communication module; and the communication module is used for sending the discharge count value of the lightning arrester to a preset external terminal.
Further, the device also comprises a power supply module; the power module is used for being connected with the main control module so as to supply power to the lightning arrester discharge counting device.
Further, the current acquisition module is a current transformer or a current divider.
Further, the main control module is further used for generating early warning information when the discharge count value of the lightning arrester exceeds a preset count threshold value, and sending the early warning information to an external terminal.
The invention has the following beneficial effects:
the embodiment of the invention discloses a lightning arrester discharge counting device, which comprises a lightning arrester transient current acquisition module, a current comparison module and a main control module; after the transient current amplitude value flowing through the lightning arrester is collected by the lightning arrester transient current collection module, the transient current amplitude value is compared with the lightning arrester action current threshold value by the current comparison module, and finally, when the transient current amplitude value is larger than the lightning arrester action current threshold value, the current lightning arrester discharge count value is added by 1 by the main control module. In the arrester counter, the current comparison module is adopted to compare the acquired current with the arrester action current threshold, and then the main control module counts according to the comparison result.
Drawings
Fig. 1 is a schematic structural diagram of an arrester discharge counting apparatus according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, an embodiment of the present invention provides an arrester discharge counting apparatus, including: the lightning arrester transient state current acquisition module, the current comparison module and the main control module; the lightning arrester transient current acquisition module is connected with the current comparison module, and the current comparison module is connected with the main control module;
the lightning arrester transient current acquisition module is used for acquiring the transient current amplitude value flowing through the lightning arrester;
the current comparison module is used for comparing the transient current amplitude with a preset arrester action current threshold;
and the main control module is used for adding 1 to the current arrester discharge count value when the transient current amplitude is greater than the arrester action current threshold value.
In a preferred embodiment, the lightning arrester transient current collecting module may be a current transformer or a current divider. Taking a current transformer as an example, a high-precision Rogowski coil (Rogowski coil) is adopted to clamp a grounding down lead at the low-voltage end of a lightning arrester body to continuously measure the transient current flowing through the lightning arrester, so as to obtain a current waveform, and extract the amplitude of a power frequency current or a lightning pulse current.
The current comparison module is a current comparator, and preferably, the action current threshold of the lightning arrester is set to be 1 mA; taking the action current threshold value of the lightning arrester as a reference current value of a current comparator, comparing the output transient current amplitude value with the reference current value, outputting a low level to the main control module when the transient current amplitude value is lower than the reference current value, and outputting a high level to the main control module when the transient current amplitude value is higher than the reference current value;
when receiving the high level, the main control module judges that the transient current amplitude is larger than the action current threshold of the lightning arrester at the moment, and adds 1 to the current count value of the lightning arrester.
In a preferred embodiment, the lightning arrester discharge counting device further comprises a display module; the display module (such as a display screen) is connected with the main control module; and the display module is used for displaying the discharge count value of the lightning arrester.
In a preferred embodiment, the lightning arrester discharge counting device further comprises a storage module; the storage module is used for storing a lightning arrester discharge count value;
in a preferred embodiment, the arrester discharge counting device further comprises a communication module; and the communication module is used for sending the discharge count value of the lightning arrester to a preset external terminal. The communication module includes but is not limited to any one or combination of the following: the device comprises a 4G communication module, a 5G communication module and a WiFi module. The lightning arrester discharge count value is transmitted to an external terminal in real time through a communication module, so that a user can remotely check the counting state of the lightning arrester through the external terminal.
In a preferred embodiment, the lightning arrester discharge counting device further comprises a power supply module; the power module is used for being connected with the main control module so as to supply power to the lightning arrester discharge counting device. The power module selects a built-in fixed power mode, an electric field wireless power taking mode or a solar power taking mode.
In a preferred embodiment, the main control module is further configured to generate early warning information when the lightning arrester discharge count value exceeds a preset count threshold value, and send the early warning information to an external terminal. In the embodiment, the main control module monitors the discharge times of the lightning arrester, and once the discharge times of the lightning arrester exceeds a counting threshold value, the lightning arrester is judged to possibly have a fault, and at the moment, early warning information is generated and is output to an external terminal through the communication module.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (7)
1. An arrester discharge counting device, comprising: the lightning arrester transient state current acquisition module, the current comparison module and the main control module; the lightning arrester transient current acquisition module is connected with the current comparison module, and the current comparison module is connected with the main control module;
the lightning arrester transient current acquisition module is used for acquiring the transient current amplitude value flowing through the lightning arrester;
the current comparison module is used for comparing the transient current amplitude with a preset arrester action current threshold;
and the main control module is used for adding 1 to the current arrester discharge count value when the transient current amplitude is greater than the arrester action current threshold value.
2. An arrester discharge counting device according to claim 1, wherein the arrester operating current threshold is 1 mA.
3. The arrester discharge counting apparatus of claim 1 further comprising a memory module; and the storage module is used for storing the discharge count value of the lightning arrester.
4. The arrester discharge counting apparatus of claim 1 further comprising a communication module; and the communication module is used for sending the discharge count value of the lightning arrester to a preset external terminal.
5. The arrester discharge counting apparatus of claim 1, further comprising a power module; and the power supply module is used for being connected with the main control module so as to supply power to the lightning arrester discharge counting device.
6. The arrester discharge counting apparatus of claim 1 wherein the current collection module is a current transformer or a current shunt.
7. The arrester discharge counting device according to claim 4, wherein the main control module is further configured to generate warning information and send the warning information to an external terminal when the arrester discharge count value exceeds a preset count threshold value.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111461887.0A CN114295889A (en) | 2021-12-02 | 2021-12-02 | Arrester counting assembly that discharges |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111461887.0A CN114295889A (en) | 2021-12-02 | 2021-12-02 | Arrester counting assembly that discharges |
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| CN114295889A true CN114295889A (en) | 2022-04-08 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102023250A (en) * | 2009-09-22 | 2011-04-20 | 华东电力试验研究院有限公司 | Metal oxide arrester monitoring device |
| CN103048528A (en) * | 2011-10-14 | 2013-04-17 | 四川蓝迅宝迩电子科技有限公司 | Precisely counting discharge counter for lightning rod |
| CN108169545A (en) * | 2018-02-27 | 2018-06-15 | 南方电网科学研究院有限责任公司 | Discharge counting circuit and discharge counter |
| CN108983060A (en) * | 2018-09-12 | 2018-12-11 | 广东电网有限责任公司 | arrester detecting device and system |
| CN109324226A (en) * | 2018-11-19 | 2019-02-12 | 中国电力科学研究院有限公司 | Lightning arrester discharge current measuring device |
| CN208833872U (en) * | 2018-09-12 | 2019-05-07 | 广东电网有限责任公司 | Arrester detecting device and system |
-
2021
- 2021-12-02 CN CN202111461887.0A patent/CN114295889A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102023250A (en) * | 2009-09-22 | 2011-04-20 | 华东电力试验研究院有限公司 | Metal oxide arrester monitoring device |
| CN103048528A (en) * | 2011-10-14 | 2013-04-17 | 四川蓝迅宝迩电子科技有限公司 | Precisely counting discharge counter for lightning rod |
| CN108169545A (en) * | 2018-02-27 | 2018-06-15 | 南方电网科学研究院有限责任公司 | Discharge counting circuit and discharge counter |
| CN108983060A (en) * | 2018-09-12 | 2018-12-11 | 广东电网有限责任公司 | arrester detecting device and system |
| CN208833872U (en) * | 2018-09-12 | 2019-05-07 | 广东电网有限责任公司 | Arrester detecting device and system |
| CN109324226A (en) * | 2018-11-19 | 2019-02-12 | 中国电力科学研究院有限公司 | Lightning arrester discharge current measuring device |
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