CN109116283B - System and method for checking residual voltage monitoring device of lightning arrester - Google Patents
System and method for checking residual voltage monitoring device of lightning arrester Download PDFInfo
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- CN109116283B CN109116283B CN201811311909.3A CN201811311909A CN109116283B CN 109116283 B CN109116283 B CN 109116283B CN 201811311909 A CN201811311909 A CN 201811311909A CN 109116283 B CN109116283 B CN 109116283B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/005—Calibrating; Standards or reference devices, e.g. voltage or resistance standards, "golden" references
Abstract
The application provides a calibration system and a calibration method for a residual voltage monitoring device of an arrester, wherein the residual voltage monitoring device of the arrester needs to correct the voltage transformation ratio before the operation of a net, and known voltage is added at a discharge gap, so that voltage field correction is carried out on a ceramic capacitor core functional insulator. When the voltage monitored by the insulator does not meet the design value, the static capacitance is adjusted according to the known relation between the static capacitance value of the discharge gap and the gap distance, and therefore the residual voltage monitoring device is corrected on site. Therefore, a new method is provided for the field inspection of the residual voltage monitoring device of the lightning arrester of the power transmission line, the field correction can be carried out on the residual voltage monitoring device of the lightning arrester of the power transmission line, and the monitoring accuracy of the device is improved.
Description
Technical Field
The application relates to the field of electric power systems, in particular to a system and a method for checking a residual voltage monitoring device of an arrester.
Background
The lightning arrester is one of the important devices of the power system, and is mainly used for limiting the internal overvoltage caused by the lightning overvoltage or operation transmitted from the power transmission line. The high-power-efficiency energy-saving power generation device has the advantages of small nonlinear coefficient, good protection characteristic, large energy absorption capacity, simple structure, good stability and the like, and is widely applied to the field of electric power.
A common drawback of lightning arresters is ageing and moisture. When the lightning arrester has the defects, the protection performance of the lightning arrester is gradually reduced and even damaged, so that the power transmission line loses the protection effect on lightning overvoltage and even trips are caused. Therefore, the lightning arrester monitoring device is required to monitor the working state of the lightning arrester in real time. Therefore, it is important to ensure the accuracy of the monitoring data of the lightning arrester monitoring device.
Disclosure of Invention
The application provides a system and a method for checking a residual voltage monitoring device of an arrester, so that the arrester monitoring device is checked, and the accuracy of monitoring data is guaranteed.
In a first aspect, the application provides a verification system for a residual voltage monitoring device of an arrester, which comprises a tower, the residual voltage monitoring device of the arrester, a verification device, the arrester, a ceramic capacitor insulator string and a low-voltage arm capacitor;
the tower is provided with a lightning arrester and a wire cross arm;
the lower end of the lightning arrester is connected with an upper gap ring of the lightning arrester, the end part of the wire cross arm is connected with a high-voltage transmission line, the high-voltage transmission line is positioned below the lightning arrester, the high-voltage transmission line is provided with a lower gap ring matched with the upper gap ring, and the lower gap ring is positioned at the intersection of the central line of the lightning arrester and the high-voltage transmission line;
the top end of the lightning arrester is connected with a current transformer,
one end of the ceramic capacitor insulator string is connected with the low-voltage arm capacitor, and the other end of the ceramic capacitor insulator string is grounded;
one end of the low-voltage arm capacitor is connected with the ceramic capacitor insulator string, and the other end of the low-voltage arm capacitor is connected with the lower clearance ring;
the lightning arrester residual voltage monitoring device is respectively connected with the current transformer and the low-voltage arm capacitor;
the calibration device is connected with the low-voltage output end of the lightning arrester residual voltage monitoring device;
the checking device is used for acquiring the output voltage of the low-voltage output end of the arrester residual voltage monitoring device,
and if the absolute value of the difference value between the output voltage and the preset output voltage value is greater than the preset error value, adjusting the distance between the upper gap ring and the lower gap ring, the size of the upper gap ring and the lower gap ring and/or the capacitance value of the ceramic capacitor insulator string until the absolute value of the difference value between the output voltage and the preset output voltage value is less than or equal to the preset error value.
Further, the system also comprises a power supply device, wherein the power supply device is one or more of a solar power generation device, a wind power generation device and a battery.
Further, the system also comprises an arrester state monitoring device, and the arrester state monitoring device is connected with the arrester residual voltage monitoring device.
Further, the arrester state monitoring device is connected with the arrester residual voltage monitoring device in a wireless connection mode.
In a second aspect, the present application provides a method for calibrating a residual voltage monitoring device of an arrester, which is applied to the above calibration system, and the method includes:
acquiring the output voltage of the low-voltage output end of the lightning arrester residual voltage monitoring device,
and if the absolute value of the difference value between the output voltage and the preset output voltage value is greater than the preset error value, adjusting the distance between the upper gap ring and the lower gap ring, the size of the upper gap ring and the lower gap ring and/or the capacitance value of the ceramic capacitor insulator string until the absolute value of the difference value between the output voltage and the preset output voltage value is less than or equal to the preset error value.
According to the technical scheme, the lightning arrester residual voltage monitoring device needs to be corrected in voltage transformation ratio before the lightning arrester residual voltage monitoring device is connected with a network to operate, and known voltage is added to a discharge gap, so that voltage field correction is performed on a ceramic capacitor core functional insulator. When the voltage monitored by the insulator does not meet the design value, the static capacitance is adjusted according to the known relation between the static capacitance value of the discharge gap and the gap distance, and therefore the residual voltage monitoring device is corrected on site. Therefore, a new method is provided for the field inspection of the residual voltage monitoring device of the lightning arrester of the power transmission line, the field correction can be carried out on the residual voltage monitoring device of the lightning arrester of the power transmission line, and the monitoring accuracy of the device is improved.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without any creative effort.
Fig. 1 is a schematic structural diagram of a calibration system of a lightning arrester residual voltage monitoring device provided in the present application;
fig. 2 is a flowchart of a method for verifying a residual voltage monitoring device of an arrester according to the present application.
The lightning arrester comprises a tower, a high-voltage transmission line, an upper gap ring, a lower gap ring, a lightning arrester, a current transformer, a residual voltage monitoring device, a lightning arrester state monitoring device and a power supply device, wherein the tower is 1, the high-voltage transmission line is 2, the upper gap ring is 3, the lower gap ring is 4, the lightning arrester is 5, the current transformer is 6, the residual voltage monitoring device is 7, the lightning arrester.
Detailed Description
Referring to fig. 1, the application provides a calibration system of a lightning arrester residual voltage monitoring device 7, which comprises a tower 1, the lightning arrester residual voltage monitoring device 7, a calibration device, a lightning arrester 5, a ceramic capacitor insulator string and a low-voltage arm capacitor;
the tower 1 is provided with a lightning arrester 5 and a wire cross arm;
the lower end of the lightning arrester 5 is connected with an upper gap ring 3 of the lightning arrester 5, the end part of the wire cross arm is connected with a high-voltage transmission line 2, the high-voltage transmission line 2 is positioned below the lightning arrester 5, the high-voltage transmission line 2 is provided with a lower gap ring 4 matched with the upper gap ring 3, and the lower gap ring 4 is positioned at the intersection of the center line of the lightning arrester 5 and the high-voltage transmission line 2;
the top end of the lightning arrester 5 is connected with a current transformer 6,
one end of the ceramic capacitor insulator string is connected with the low-voltage arm capacitor, and the other end of the ceramic capacitor insulator string is grounded;
one end of the low-voltage arm capacitor is connected with the ceramic capacitor insulator string, and the other end of the low-voltage arm capacitor is connected with the lower clearance ring 4;
the lightning arrester residual voltage monitoring device 7 is respectively connected with the current transformer 6 and the low-voltage arm capacitor;
the calibration device is connected with the low-voltage output end of the lightning arrester residual voltage monitoring device 7;
the checking device is used for obtaining the output voltage of the low-voltage output end of the arrester residual voltage monitoring device 7,
the output voltage of the low-voltage output end of the lightning arrester residual voltage monitoring device 7 is calculated by adopting the following formula:
If the absolute value of the difference between the output voltage and the preset output voltage value is greater than the preset error value, the distance between the upper gap ring 3 and the lower gap ring 4, the sizes of the upper gap ring 3 and the lower gap ring 4 and/or the capacitance value C12 of the ceramic capacitor insulator string are adjusted until the absolute value of the difference between the output voltage and the preset output voltage value is less than or equal to the preset error value.
According to the technical scheme, the application provides a calibration system of the residual voltage monitoring device 7 of the lightning arrester, the residual voltage monitoring device 7 of the lightning arrester needs to correct the voltage transformation ratio before the operation of a net, and known voltage is added at a discharge gap, so that voltage field correction is carried out on a ceramic capacitor core functional insulator. When the voltage monitored by the insulator does not meet the design value, the static capacitance is adjusted according to the known relation between the static capacitance value of the discharge gap and the gap distance, and therefore the residual voltage monitoring device is corrected on site. Therefore, a new method is provided for the field inspection of the residual voltage monitoring device 7 of the lightning arrester of the power transmission line, the residual voltage monitoring device 7 of the lightning arrester of the power transmission line can be corrected on the field, and the monitoring accuracy of the device is improved.
Further, the system also comprises a power supply device, wherein the power supply device is one or more of a solar power generation device, a wind power generation device and a battery.
Various power generation equipment supplies power to the lightning arrester residual voltage monitoring device 7 so as to ensure that the lightning arrester residual voltage monitoring device 7 works uninterruptedly.
Further, the system also comprises a lightning arrester 5 state monitoring device 8, wherein the lightning arrester 5 state monitoring device 8 is connected with the lightning arrester residual voltage monitoring device 7.
The lightning arrester 5 state monitoring device 8 receives the data sent by the lightning arrester residual voltage monitoring device 7, so that the working state of the lightning arrester 5 can be remotely mastered by the working personnel.
Further, the lightning arrester 5 state monitoring device 8 is connected with the lightning arrester residual voltage monitoring device 7 in a wireless connection mode.
In a second aspect, referring to fig. 2, the present application provides a method for verifying a residual voltage monitoring device of an arrester, which is applied to the verification system, and the method includes the following steps:
step 21: and acquiring the output voltage of the low-voltage output end of the lightning arrester residual voltage monitoring device 7.
Step 22: if the absolute value of the difference between the output voltage and the preset output voltage value is greater than the preset error value, adjusting the distance between the upper gap ring 3 and the lower gap ring 4, the sizes of the upper gap ring 3 and the lower gap ring 4 and/or the capacitance value C12 of the ceramic capacitor insulator string until the absolute value of the difference between the output voltage and the preset output voltage value is less than or equal to the preset error value.
According to the technical scheme, the lightning arrester residual voltage monitoring device 7 needs to be corrected in voltage transformation ratio before the lightning arrester residual voltage monitoring device 7 is connected with a network and operates, and known voltage is added to a discharge gap, so that voltage field correction is conducted on the ceramic capacitor core functional insulator. When the voltage monitored by the insulator does not meet the design value, the static capacitance is adjusted according to the known relation between the static capacitance value of the discharge gap and the gap distance, and therefore the residual voltage monitoring device is corrected on site. Therefore, a new method is provided for the field inspection of the residual voltage monitoring device 7 of the lightning arrester of the power transmission line, the residual voltage monitoring device 7 of the lightning arrester of the power transmission line can be corrected on the field, and the monitoring accuracy of the device is improved.
Claims (5)
1. A calibration system of a lightning arrester residual voltage monitoring device is characterized by comprising a tower, the lightning arrester residual voltage monitoring device, a calibration device, a lightning arrester, a ceramic capacitor insulator string and a low-voltage arm capacitor;
the tower is provided with a lightning arrester and a wire cross arm;
the lower end of the lightning arrester is connected with an upper gap ring of the lightning arrester, the end part of the wire cross arm is connected with a high-voltage transmission line, the high-voltage transmission line is positioned below the lightning arrester, the high-voltage transmission line is provided with a lower gap ring matched with the upper gap ring, and the lower gap ring is positioned at the intersection of the central line of the lightning arrester and the high-voltage transmission line;
the top end of the lightning arrester is connected with a current transformer,
one end of the ceramic capacitor insulator string is connected with the low-voltage arm capacitor, and the other end of the ceramic capacitor insulator string is grounded;
one end of the low-voltage arm capacitor is connected with the ceramic capacitor insulator string, and the other end of the low-voltage arm capacitor is connected with the lower clearance ring;
the lightning arrester residual voltage monitoring device is respectively connected with the current transformer and the low-voltage arm capacitor;
the calibration device is connected with the low-voltage output end of the lightning arrester residual voltage monitoring device;
the checking device is used for acquiring the output voltage of the low-voltage output end of the arrester residual voltage monitoring device,
and if the absolute value of the difference value between the output voltage and the preset output voltage value is greater than the preset error value, adjusting the distance between the upper gap ring and the lower gap ring, the size of the upper gap ring and the lower gap ring and/or the capacitance value of the ceramic capacitor insulator string until the absolute value of the difference value between the output voltage and the preset output voltage value is less than or equal to the preset error value.
2. The system for verifying the residual voltage monitoring device of the lightning arrester according to claim 1, further comprising a power supply device, wherein the power supply device is one or more of a solar power generation device, a wind power generation device and a battery.
3. The system for verifying a surge arrester residual voltage monitoring device according to claim 1, further comprising a surge arrester state monitoring device connected to the surge arrester residual voltage monitoring device.
4. The system for checking an arrester residual voltage monitoring device according to claim 3, wherein the arrester state monitoring device is connected to the arrester residual voltage monitoring device by wireless connection.
5. A method for verifying a residual voltage monitoring device for an arrester, which is applied to a verification system for a residual voltage monitoring device for an arrester according to any one of claims 1 to 4, the method comprising:
acquiring the output voltage of the low-voltage output end of the lightning arrester residual voltage monitoring device;
and if the absolute value of the difference value between the output voltage and the preset output voltage value is greater than the preset error value, adjusting the distance between the upper gap ring and the lower gap ring, the size of the upper gap ring and the lower gap ring and/or the capacitance value of the ceramic capacitor insulator string until the absolute value of the difference value between the output voltage and the preset output voltage value is less than or equal to the preset error value.
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| CN102930943A (en) * | 2012-10-09 | 2013-02-13 | 中国电力科学研究院 | Pure-air serial gap type extra-high voltage line lightening arrester |
| CN204101715U (en) * | 2014-10-13 | 2015-01-14 | 国家电网公司 | A kind of counter of lightning arrester tester calibration device |
| CN204166118U (en) * | 2014-10-11 | 2015-02-18 | 广东电网公司江门供电局 | A kind of lightning arrester on-line computing model performance calibration equipment on the spot |
| CN106526383A (en) * | 2016-11-24 | 2017-03-22 | 云南电网有限责任公司电力科学研究院 | Lightning arrester state monitoring system and lightning arrester state monitoring method |
| CN106597147A (en) * | 2016-11-24 | 2017-04-26 | 云南电网有限责任公司电力科学研究院 | State monitoring system and method of lightning arrester with series gap based on residual voltage monitoring |
| CN206193133U (en) * | 2016-11-24 | 2017-05-24 | 云南电网有限责任公司电力科学研究院 | Arrester state monitoring system |
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- 2018-11-06 CN CN201811311909.3A patent/CN109116283B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102323558A (en) * | 2011-05-30 | 2012-01-18 | 中国西电电气股份有限公司 | Device and method for calibrating valve direct current residual voltage parameter tester of zinc oxide arrester |
| CN102930943A (en) * | 2012-10-09 | 2013-02-13 | 中国电力科学研究院 | Pure-air serial gap type extra-high voltage line lightening arrester |
| CN204166118U (en) * | 2014-10-11 | 2015-02-18 | 广东电网公司江门供电局 | A kind of lightning arrester on-line computing model performance calibration equipment on the spot |
| CN204101715U (en) * | 2014-10-13 | 2015-01-14 | 国家电网公司 | A kind of counter of lightning arrester tester calibration device |
| CN106526383A (en) * | 2016-11-24 | 2017-03-22 | 云南电网有限责任公司电力科学研究院 | Lightning arrester state monitoring system and lightning arrester state monitoring method |
| CN106597147A (en) * | 2016-11-24 | 2017-04-26 | 云南电网有限责任公司电力科学研究院 | State monitoring system and method of lightning arrester with series gap based on residual voltage monitoring |
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