CN112784410A - Lightning arrester valve plate performance evaluation system and method under lightning stroke - Google Patents
Lightning arrester valve plate performance evaluation system and method under lightning stroke Download PDFInfo
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- CN112784410A CN112784410A CN202110075210.7A CN202110075210A CN112784410A CN 112784410 A CN112784410 A CN 112784410A CN 202110075210 A CN202110075210 A CN 202110075210A CN 112784410 A CN112784410 A CN 112784410A
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Abstract
The application provides a lightning arrester valve plate performance evaluation system and method under thunderbolt, the system includes: the device comprises a processor, a power frequency power supply connected with the processor, an impact current source, a high-precision voltage probe, a high-frequency current probe, a digital signal processor and an infrared camera. The method comprises the following steps: the processor starts a power frequency power supply and applies power frequency current to the valve plate of the lightning arrester to be tested; acquiring a first group of data acquired by a high-precision voltage probe, a high-frequency current probe, a digital signal processor and an infrared camera; keeping the power frequency power supply on, starting an impact current source to apply lightning current waves, and acquiring a second group of data; and the processor calculates a comprehensive performance evaluation factor according to the first group of data and the second group of data to judge the performance of the valve plate of the lightning arrester to be tested. The lightning arrester valve plate performance evaluation method and device based on the lightning arrester valve plate performance evaluation are capable of combining leakage current and temperature rise under lightning strike, calculating the valve plate performance comprehensive evaluation factor, judging the performance of the lightning arrester valve plate according to the comprehensive evaluation factor, and effectively improving accuracy of performance evaluation of the lightning arrester valve plate.
Description
Technical Field
The invention belongs to the technical field of lightning arrester protection, and particularly relates to a lightning arrester valve plate performance evaluation system and method under lightning stroke.
Background
A zinc oxide arrester is an overvoltage protection device installed in the vicinity of protected equipment in an electric power system in parallel with the protected equipment to limit overvoltage in the electric power system to a level harmless to insulation. Therefore, the power transmission line and the electrical equipment are protected from damage caused by atmospheric overvoltage and operation overvoltage such as lightning stroke. The zinc oxide arrester is applied to various fields of electrical engineering by virtue of excellent nonlinearity, volt-ampere operating characteristics, good through-current capacity and simple and reliable structure.
Along with the long-time protection power equipment of arrester, receive the influence of bad weather such as thunderbolt, lead to zinc oxide arrester to take place ageing gradually. When the lightning arrester is aged, the leakage current is increased, the insulating property of the lightning arrester is greatly reduced, the heating value of the lightning arrester is increased, the energy loss is increased, the lightning arrester is finally damaged, and the whole power system is greatly influenced under the serious condition.
The existing method for evaluating the performance of the valve plate of the lightning arrester mainly adopts an on-line monitoring method, but most of detection devices only monitor leakage current of the lightning arrester, meanwhile, the existing equipment does not have the capability of quickly sampling instantaneous signals when lightning stroke signals occur, the performance of the valve plate of the lightning arrester cannot be effectively evaluated through multi-data fusion, and the evaluation method is low in accuracy.
Disclosure of Invention
The application provides a lightning arrester valve plate performance evaluation system and method under lightning stroke. The method solves the problem that the existing method for evaluating the performance of the valve plate of the lightning arrester can not effectively evaluate the performance of the valve plate of the lightning arrester through multi-data fusion only according to the leakage current of the lightning arrester, so that the accuracy of the evaluation method is low.
On the one hand, this application provides an arrester valve block performance evaluation system under thunderbolt, includes: the device comprises a processor, a power frequency power supply, an impulse current source, a high-precision voltage probe, a high-frequency current probe, a digital signal processor and an infrared camera;
one end of the power frequency power supply is connected with the processor, the other end of the power frequency power supply is connected with the valve plate of the lightning arrester to be tested, and the power frequency power supply is used for applying power frequency current to the valve plate of the lightning arrester to be tested;
one end of the impact current source is connected with the processor, the other end of the impact current source is connected with the valve plate of the lightning arrester to be tested, and the impact current source is used for applying standard lightning current waves to the valve plate of the lightning arrester to be tested;
the input end of the high-precision voltage probe is connected with the valve plate of the lightning arrester to be tested in parallel, the output end of the high-precision voltage probe is connected with the processor through the digital signal processor, the high-precision voltage probe is used for acquiring a voltage signal of the valve plate of the lightning arrester to be tested, the digital signal processor is used for carrying out harmonic separation on the voltage signal and sending a harmonic separation result to the processor;
the input end of the high-frequency current probe is connected with the valve plate of the lightning arrester to be tested in series, the output end of the high-frequency current probe is connected with the processor, and the high-frequency current probe is used for acquiring the current value of the valve plate of the lightning arrester to be tested and sending the current value to the processor;
the infrared camera is connected with the processor and used for measuring the temperature of the valve plate of the lightning arrester to be measured and sending the temperature to the processor;
and the processor is used for calculating a comprehensive evaluation factor of the valve plate of the lightning arrester to be tested according to the harmonic separation result, the current value and the temperature.
Optionally, the system further includes a wireless base station and a remote wireless master station, the wireless base station is connected to the processor by wire, and the wireless base station is connected to the remote wireless master station by wireless.
Optionally, the processor is further configured to: and performing data transmission with the remote wireless master station through the wireless base station, and receiving an instruction of the remote wireless master station.
On the other hand, this application still provides an arrester valve block performance evaluation method under thunderbolt, includes:
the processor starts a power frequency power supply according to the opening instruction, and applies power frequency current to the valve plate of the lightning arrester to be tested;
acquiring a first group of data acquired by a high-precision voltage probe, a high-frequency current probe, a digital signal processor and an infrared camera;
keeping the power frequency power supply on, starting an impact current source to apply lightning current waves to the valve plate of the lightning arrester to be tested for five minutes, and then acquiring a second group of data acquired by the high-precision voltage probe, the high-frequency current probe, the digital signal processor and the infrared camera;
the processor calculates a comprehensive evaluation factor rho of the performance of the valve plate of the lightning arrester to be tested according to the first group of data and the second group of data, and the calculation formula is as follows:
ρ＝S+P
s is a lightning stroke temperature rise performance evaluation factor, and P is a valve plate distortion evaluation factor;
and judging the performance of the valve plate of the lightning arrester to be tested according to the comprehensive performance evaluation factor rho of the valve plate of the lightning arrester to be tested.
Optionally, the step of judging the performance of the valve plate of the lightning arrester to be tested according to the comprehensive performance evaluation factor ρ of the valve plate of the lightning arrester to be tested includes:
if the performance comprehensive evaluation factor rho belongs to [0,0.05], evaluating that the valve plate of the lightning arrester to be tested is qualified;
if the performance comprehensive evaluation factor rho is within the range of (0.05, 1), evaluating the slight aging of the valve plate of the lightning arrester to be tested;
and if the performance comprehensive evaluation factor rho epsilon (1, infinity), evaluating the serious aging of the valve plate of the lightning arrester to be tested.
Optionally, the first set of data includes: first current effective value IxsCurrent value I when voltage of first industrial frequency power supply crosses zero pointd0The first applied voltage is a voltage U with a counterclockwise phase shift of 90 DEGpzFirst voltage first harmonic UtsThird harmonic U of the first voltageosFirst temperature Tz；
The second set of data includes: second current effective value IxzCurrent value I when voltage of second industrial frequency power supply crosses zero pointp0The voltage U after the second external voltage is anticlockwise shifted by 90 degreespsSecond voltage first harmonic UozThird harmonic U of second voltagetzSecond temperature Ts。
Optionally, the calculation formula of the lightning stroke temperature rise performance evaluation factor S is as follows:
wherein, ω is the angular velocity of the output current of the power frequency power supply.
Optionally, the calculation formula of the valve sheet distortion evaluation factor P is as follows:
optionally, the impulse current source (3) applies lightning current excitation with wave front time of 8 μ s and wave tail time of 20 μ s to the valve plate of the lightning arrester to be tested.
Optionally, the start instruction is generated by the remote wireless master station and sent to the processor through the wireless base station.
According to the technical scheme, the system and the method for evaluating the performance of the valve plate of the lightning arrester under the lightning stroke are provided, and the system comprises: the device comprises a processor, a power frequency power supply, an impulse current source, a high-precision voltage probe, a high-frequency current probe, a digital signal processor and an infrared camera; one end of the power frequency power supply is connected with the processor, the other end of the power frequency power supply is connected with the valve plate of the lightning arrester to be tested, and the power frequency power supply is used for applying power frequency current to the valve plate of the lightning arrester to be tested; one end of the impact current source is connected with the processor, the other end of the impact current source is connected with the valve plate of the lightning arrester to be tested, and the impact current source is used for applying standard lightning current waves to the valve plate of the lightning arrester to be tested.
The input end of the high-precision voltage probe is connected with the valve plate of the lightning arrester to be tested in parallel, the output end of the high-precision voltage probe is connected with the processor through the digital signal processor, the high-precision voltage probe is used for acquiring a voltage signal of the valve plate of the lightning arrester to be tested, the digital signal processor is used for carrying out harmonic separation on the voltage signal and sending a harmonic separation result to the processor; the input end of the high-frequency current probe is connected with the valve plate of the lightning arrester to be tested in series, the output end of the high-frequency current probe is connected with the processor, and the high-frequency current probe is used for acquiring the current value of the valve plate of the lightning arrester to be tested and sending the current value to the processor; the infrared camera is connected with the processor and used for measuring the temperature of the valve plate of the lightning arrester to be measured and sending the temperature to the processor; and the processor is used for calculating a comprehensive evaluation factor of the valve plate of the lightning arrester to be tested according to the harmonic separation result, the current value and the temperature.
The application provides a lightning arrester valve plate performance evaluation system and method under thunderbolt, can combine leakage current and temperature rise under the thunderbolt, calculate valve plate performance comprehensive assessment factor, judge the performance of lightning arrester valve plate according to comprehensive assessment factor, the effectual accuracy that improves lightning arrester valve plate performance and assesses.
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 creative efforts.
FIG. 1 is a schematic structural diagram of an embodiment of a lightning arrester valve plate performance evaluation system under lightning strike provided by the present application;
fig. 2 is a flowchart of an embodiment of a method for evaluating performance of a valve plate of a lightning arrester under lightning strike provided by the application.
Detailed Description
Reference will now be made in detail to embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following examples do not represent all embodiments consistent with the present application. But merely as exemplifications of systems and methods consistent with certain aspects of the application, as recited in the claims.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an embodiment of a lightning arrester valve plate performance evaluation system under lightning strike provided by the present application.
On the one hand, this application provides an arrester valve block performance evaluation system under thunderbolt, includes: the device comprises a processor 1, a power frequency power supply 2, an impact current source 3, a high-precision voltage probe 4, a high-frequency current probe 5, a digital signal processor 6 and an infrared camera 7.
One end of the power frequency power supply 2 is connected with the processor 1, the other end of the power frequency power supply 2 is connected with the valve plate of the lightning arrester to be tested, and the power frequency power supply 2 is used for applying power frequency current to the valve plate of the lightning arrester to be tested. The power frequency power supply 2 is a device capable of providing power frequency current, the power frequency current is the rated frequency adopted by power generation, power transmission, power transformation and distribution equipment and industrial and civil electrical equipment of a power system, and 50Hz is adopted in China. And the power frequency power supply 2 provides power for the performance evaluation system of the valve plate of the lightning arrester, and applies power frequency current to the valve plate of the lightning arrester to be tested.
One end of the impact current source 3 is connected with the processor 1, the other end of the impact current source 3 is connected with the valve plate of the lightning arrester to be tested, and the impact current source 3 is used for applying standard lightning current waves to the valve plate of the lightning arrester to be tested. The rush current source 3 generates a rush current by generating a large current at a moment when a load is energized. The impact current source 3 is used for simulating a scene of the valve plate of the lightning arrester to be tested when the valve plate is subjected to lightning shock, so that relevant parameter data after passing through lightning waves are obtained.
The input end of the high-precision voltage probe 4 is connected with the valve plate of the lightning arrester to be tested in parallel, the output end of the high-precision voltage probe 4 is connected with the processor 1 through the digital signal processor 6, the high-precision voltage probe 4 is used for acquiring a voltage signal of the valve plate of the lightning arrester to be tested, and the digital signal processor 6 is used for carrying out harmonic separation on the voltage signal and sending a harmonic separation result to the processor 1.
The high-precision voltage probe 4 adopts a high-precision voltage probe, and can accurately obtain the voltage at two ends of a measured object. The digital signal processor 6 can perform harmonic separation processing on the voltage signal acquired by the high-precision voltage probe 4. In this embodiment, the digital signal processor 6 outputs the first harmonic voltage value and the third harmonic voltage value respectively for calculating the comprehensive evaluation factor of the performance of the valve plate of the arrester.
The input end of the high-frequency current probe 5 is connected with the valve block of the lightning arrester to be tested in series, the output end of the high-frequency current probe 5 is connected with the processor 1, and the high-frequency current probe 5 is used for acquiring the current value of the valve block of the lightning arrester to be tested and sending the current value to the processor 1.
The infrared camera 7 is connected with the processor 1, and the infrared camera 7 is used for measuring the temperature of the valve plate of the lightning arrester to be measured and sending the temperature to the processor 1. The infrared camera 7 can measure the temperature of the lightning arrester valve plate in a non-contact manner at a long distance.
And the processor 1 is used for calculating a comprehensive evaluation factor of the valve plate of the lightning arrester to be tested according to the harmonic separation result, the current value and the temperature. The processor 1 adopts a high-performance processor with high operation speed, can quickly calculate a comprehensive evaluation factor of the valve plate of the lightning arrester to be tested after receiving the harmonic separation result, the current value and the temperature, and evaluates the performance of the valve plate of the lightning arrester in real time according to the comprehensive evaluation factor.
Optionally, the system further includes a wireless base station 8 and a remote wireless master station 9, where the wireless base station 8 is connected to the processor 1 by wire, and the wireless base station 8 is connected to the remote wireless master station 9 by wireless. Through wireless basic station 8 with remote end wireless master station 9 can realize this application arrester valve block performance evaluation system's remote control operation, and the operation is safe, simple intelligence.
Optionally, the processor 1 is further configured to: and performing data transmission with the remote master radio station 9 through the radio base station 8, and receiving an instruction of the remote master radio station 9. In this embodiment, the processor 1 starts to evaluate the performance of the valve plate of the lightning arrester after receiving the instruction from the remote wireless master station 9. The results may be fed back to the remote radio master station 9 after evaluation.
Referring to fig. 2, fig. 2 is a flowchart of an embodiment of a method for evaluating a performance of a valve plate of a lightning arrester under lightning strike according to the present application. On the other hand, this application still provides an arrester valve block performance evaluation method under thunderbolt, includes:
s1: the processor 1 starts a power frequency power supply 2 according to the opening instruction, and applies power frequency current to the valve plate of the lightning arrester to be tested;
s2: acquiring a first group of data acquired by a high-precision voltage probe 4, a high-frequency current probe 5, a digital signal processor 6 and an infrared camera 7;
s3: keeping the power frequency power supply 2 on, starting an impact current source 3 to apply lightning current waves to the valve plate of the lightning arrester to be tested for five minutes, and then acquiring a second group of data acquired by the high-precision voltage probe 4, the high-frequency current probe 5, the digital signal processor 6 and the infrared camera 7;
s4: the processor 1 calculates a comprehensive evaluation factor rho of the performance of the valve plate of the lightning arrester to be tested according to the first group of data and the second group of data, and the calculation formula is as follows:
ρ＝S+P
s is a lightning stroke temperature rise performance evaluation factor, and P is a valve plate distortion evaluation factor;
s5: and judging the performance of the valve plate of the lightning arrester to be tested according to the comprehensive performance evaluation factor rho of the valve plate of the lightning arrester to be tested.
Optionally, the step of judging the performance of the valve plate of the lightning arrester to be tested according to the comprehensive performance evaluation factor ρ of the valve plate of the lightning arrester to be tested includes:
if the performance comprehensive evaluation factor rho belongs to [0,0.05], evaluating that the valve plate of the lightning arrester to be tested is qualified;
if the performance comprehensive evaluation factor rho is within the range of (0.05, 1), evaluating the slight aging of the valve plate of the lightning arrester to be tested;
and if the performance comprehensive evaluation factor rho epsilon (1, infinity), evaluating the serious aging of the valve plate of the lightning arrester to be tested.
Optionally, the first set of data includes: first current effective value IxsCurrent value I when voltage of first industrial frequency power supply crosses zero pointd0The first applied voltage is a voltage U with a counterclockwise phase shift of 90 DEGpzFirst voltage first harmonic UtsThird harmonic U of the first voltageosFirst temperature Tz；
The second set of data includes: second current effective value IxzCurrent value I when voltage of second industrial frequency power supply crosses zero pointp0The voltage U after the second external voltage is anticlockwise shifted by 90 degreespsSecond voltage first harmonic UozThird harmonic U of second voltagetzSecond temperature Ts。
Optionally, the calculation formula of the lightning stroke temperature rise performance evaluation factor S is as follows:
wherein, ω is the angular velocity of the output current of the power frequency power supply.
Optionally, the calculation formula of the valve sheet distortion evaluation factor P is as follows:
optionally, the impulse current source 3 applies lightning current excitation with wave front time of 8 μ s and wave tail time of 20 μ s to the valve plate of the lightning arrester to be tested.
Optionally, the start instruction is generated by the remote master radio station 9, and is sent to the processor 1 through the radio base station 8.
According to the technical scheme, the system and the method for evaluating the performance of the valve plate of the lightning arrester under the lightning stroke are provided, and the system comprises: the device comprises a processor 1, a power frequency power supply 2, an impact current source 3, a high-precision voltage probe 4, a high-frequency current probe 5, a digital signal processor 6 and an infrared camera 7; one end of the power frequency power supply 2 is connected with the processor 1, the other end of the power frequency power supply 2 is connected with a valve plate of the lightning arrester to be tested, and the power frequency power supply 2 is used for applying power frequency current to the valve plate of the lightning arrester to be tested; one end of the impact current source 3 is connected with the processor 1, the other end of the impact current source 3 is connected with the valve plate of the lightning arrester to be tested, and the impact current source 3 is used for applying standard lightning current waves to the valve plate of the lightning arrester to be tested.
The input end of the high-precision voltage probe 4 is connected with the valve plate of the lightning arrester to be tested in parallel, the output end of the high-precision voltage probe 4 is connected with the processor 1 through the digital signal processor 6, the high-precision voltage probe 4 is used for acquiring a voltage signal of the valve plate of the lightning arrester to be tested, the digital signal processor 6 is used for performing harmonic separation on the voltage signal and sending a harmonic separation result to the processor 1; the input end of the high-frequency current probe 5 is connected with the valve plate of the lightning arrester to be tested in series, the output end of the high-frequency current probe 5 is connected with the processor 1, and the high-frequency current probe 5 is used for acquiring the current value of the valve plate of the lightning arrester to be tested and sending the current value to the processor 1; the infrared camera 7 is connected with the processor 1, and the infrared camera 7 is used for measuring the temperature of the valve plate of the lightning arrester to be measured and sending the temperature to the processor 1; and the processor 1 is used for calculating a comprehensive evaluation factor of the valve plate of the lightning arrester to be tested according to the harmonic separation result, the current value and the temperature.
The application provides a lightning arrester valve plate performance evaluation system and method under thunderbolt, can combine leakage current and temperature rise under the thunderbolt, calculate valve plate performance comprehensive assessment factor, judge the performance of lightning arrester valve plate according to comprehensive assessment factor, the effectual accuracy that improves lightning arrester valve plate performance and assesses.
The embodiments provided in the present application are only a few examples of the general concept of the present application, and do not limit the scope of the present application. Any other embodiments extended according to the scheme of the present application without inventive efforts will be within the scope of protection of the present application for a person skilled in the art.
Claims (10)
1. The utility model provides a lightning arrester valve block performance evaluation system under thunderbolt which characterized in that includes: the device comprises a processor (1), a power frequency power supply (2), an impact current source (3), a high-precision voltage probe (4), a high-frequency current probe (5), a digital signal processor (6) and an infrared camera (7);
one end of the power frequency power supply (2) is connected with the processor (1), the other end of the power frequency power supply (2) is connected with the valve plate of the lightning arrester to be tested, and the power frequency power supply (2) is used for applying power frequency current to the valve plate of the lightning arrester to be tested;
one end of the impact current source (3) is connected with the processor (1), the other end of the impact current source (3) is connected with the valve plate of the lightning arrester to be tested, and the impact current source (3) is used for applying standard lightning current waves to the valve plate of the lightning arrester to be tested;
the input end of the high-precision voltage probe (4) is connected with the valve plate of the lightning arrester to be tested in parallel, the output end of the high-precision voltage probe (4) is connected with the processor (1) through the digital signal processor (6), the high-precision voltage probe (4) is used for acquiring a voltage signal of the valve plate of the lightning arrester to be tested, the digital signal processor (6) is used for carrying out harmonic separation on the voltage signal and sending a harmonic separation result to the processor (1);
the input end of the high-frequency current probe (5) is connected with the valve plate of the lightning arrester to be tested in series, the output end of the high-frequency current probe (5) is connected with the processor (1), and the high-frequency current probe (5) is used for acquiring the current value of the valve plate of the lightning arrester to be tested and sending the current value to the processor (1);
the infrared camera (7) is connected with the processor (1), and the infrared camera (7) is used for measuring the temperature of the valve plate of the lightning arrester to be measured and sending the temperature to the processor (1);
the processor (1) is used for calculating a comprehensive evaluation factor of the valve plate of the lightning arrester to be tested according to the harmonic separation result, the current value and the temperature.
2. The lightning arrester valve plate performance evaluation system according to claim 1, further comprising a wireless base station (8) and a remote wireless master station (9), wherein the wireless base station (8) is in wired connection with the processor (1), and the wireless base station (8) is in wireless connection with the remote wireless master station (9).
3. The lightning strike arrester valve plate performance evaluation system according to claim 1, wherein the processor (1) is further configured to: and performing data transmission with the remote wireless master station (9) through the wireless base station (8), and receiving an instruction of the remote wireless master station (9).
4. A lightning arrester valve plate performance evaluation method under lightning stroke is characterized by comprising the following steps:
the processor (1) starts a power frequency power supply (2) according to the opening instruction, and applies power frequency current to the valve plate of the lightning arrester to be tested;
acquiring a first group of data acquired by a high-precision voltage probe (4), a high-frequency current probe (5), a digital signal processor (6) and an infrared camera (7);
keeping the power frequency power supply (2) on, starting an impact current source (3) to apply lightning current waves to the valve plate of the lightning arrester to be tested for five minutes, and then acquiring a second group of data acquired by the high-precision voltage probe (4), the high-frequency current probe (5), the digital signal processor (6) and the infrared camera (7);
the processor (1) calculates a comprehensive evaluation factor rho of the performance of the valve plate of the lightning arrester to be tested according to the first group of data and the second group of data, and the calculation formula is as follows:
ρ＝S+P
s is a lightning stroke temperature rise performance evaluation factor, and P is a valve plate distortion evaluation factor;
and judging the performance of the valve plate of the lightning arrester to be tested according to the comprehensive performance evaluation factor rho of the valve plate of the lightning arrester to be tested.
5. The method for evaluating the performance of the lightning arrester valve plate under the lightning stroke according to claim 4, wherein the step of judging the performance of the lightning arrester valve plate under test according to the comprehensive evaluation factor p of the performance of the lightning arrester valve plate under test comprises the following steps:
if the performance comprehensive evaluation factor rho belongs to [0,0.05], evaluating that the valve plate of the lightning arrester to be tested is qualified;
if the performance comprehensive evaluation factor rho is within the range of (0.05, 1), evaluating the slight aging of the valve plate of the lightning arrester to be tested;
and if the performance comprehensive evaluation factor rho epsilon (1, infinity), evaluating the serious aging of the valve plate of the lightning arrester to be tested.
6. The method for evaluating the performance of a valve plate of a lightning arrester according to claim 4, wherein the first group of data comprises: first current effective value IxsCurrent value I when voltage of first industrial frequency power supply crosses zero pointd0The first applied voltage is a voltage U with a counterclockwise phase shift of 90 DEGpzFirst voltage first harmonic UtsThird harmonic U of the first voltageosFirst temperature Tz；
The second set of data includes: second current effective value IxzCurrent value I when voltage of second industrial frequency power supply crosses zero pointp0The voltage U after the second external voltage is anticlockwise shifted by 90 degreespsSecond voltage first harmonic UozThird harmonic U of second voltagetzSecond temperature Ts。
7. The method for evaluating the performance of the lightning arrester valve plate under the lightning stroke according to claim 6, wherein the calculation formula of the lightning stroke temperature rise performance evaluation factor S is as follows:
wherein, ω is the angular velocity of the output current of the power frequency power supply.
8. The method for evaluating the performance of the lightning arrester valve plate under the lightning stroke according to claim 6, characterized in that the calculation formula of the valve plate distortion evaluation factor P is as follows:
9. the method for evaluating the performance of the lightning arrester valve plate under lightning stroke according to claim 4, characterized in that the impact current source (3) applies lightning current excitation with wave front time of 8 μ s and wave tail time of 20 μ s to the lightning arrester valve plate to be tested.
10. The lightning arrester valve plate performance evaluation method according to claim 4, wherein the opening command is generated by a remote wireless master station (9) and sent to the processor (1) through a wireless base station (8).
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113639970A (en) * | 2021-08-19 | 2021-11-12 | 云南电网有限责任公司电力科学研究院 | Method for evaluating ground detection calibration capability of satellite lightning imager |
| CN114137288A (en) * | 2021-11-15 | 2022-03-04 | 西南交通大学 | Lightning arrester performance evaluation method under single lightning stroke considering energy extraction |
| CN115166449A (en) * | 2022-08-11 | 2022-10-11 | 云南电网有限责任公司电力科学研究院 | Zinc oxide valve plate performance evaluation method and system |
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