CN110780227A - Online monitoring device and method for leakage current of lightning arrester of power transmission line - Google Patents

Online monitoring device and method for leakage current of lightning arrester of power transmission line Download PDF

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Publication number
CN110780227A
CN110780227A CN201911038998.3A CN201911038998A CN110780227A CN 110780227 A CN110780227 A CN 110780227A CN 201911038998 A CN201911038998 A CN 201911038998A CN 110780227 A CN110780227 A CN 110780227A
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CN
China
Prior art keywords
circuit
leakage current
arrester
line
monitoring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201911038998.3A
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Chinese (zh)
Inventor
高强
袁放
钟丹田
刘爱民
孔剑虹
刘齐
郭占男
原峰
代继成
潘丰厚
王茂军
李在林
潘加玉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Liaoning Electric Power Co Ltd
Liaoning Dongke Electric Power Co Ltd
Original Assignee
State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Liaoning Electric Power Co Ltd
Liaoning Dongke Electric Power Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by State Grid Corp of China SGCC, Electric Power Research Institute of State Grid Liaoning Electric Power Co Ltd, Liaoning Dongke Electric Power Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN201911038998.3A priority Critical patent/CN110780227A/en
Publication of CN110780227A publication Critical patent/CN110780227A/en
Pending legal-status Critical Current

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01DMEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D21/00Measuring or testing not otherwise provided for
    • G01D21/02Measuring two or more variables by means not covered by a single other subclass
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
    • G01R15/14Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
    • G01R15/18Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/165Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • G01R19/16566Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
    • G01R19/16571Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing AC or DC current with one threshold, e.g. load current, over-current, surge current or fault current
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/165Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • G01R19/17Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values giving an indication of the number of times this occurs, i.e. multi-channel analysers
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/12Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
    • G01R31/1227Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/12Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
    • G01R31/14Circuits therefor, e.g. for generating test voltages, sensing circuits
    • GPHYSICS
    • G08SIGNALLING
    • G08CTRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C17/00Arrangements for transmitting signals characterised by the use of a wireless electrical link
    • G08C17/02Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/35Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells

Abstract

The invention belongs to the technical field of on-line monitoring of power equipment, and particularly relates to an on-line monitoring device and method for leakage current of a lightning arrester of a power transmission line. The invention is characterized in that a leakage current inflow end in a line arrester monitoring main board is connected with a tail screen of the line arrester monitoring main board, and a leakage current outflow end in the line arrester monitoring main board is connected between pole tower grounds; the output of power management module is connected with the input of line arrester monitoring mainboard, and power management module input is connected with solar cell panel's output, power management module and battery both way junction. The invention realizes the on-line monitoring of the line arrester, enables the remote end to more reliably and accurately evaluate the performance of the line arrester by acquiring the working data of the line arrester, provides data support for the state evaluation of the line arrester, effectively reduces the working strength of the operation and maintenance personnel of the power transmission line, and plays a positive role in improving the operation stability of the power transmission line.

Description

Online monitoring device and method for leakage current of lightning arrester of power transmission line
Technical Field
The invention belongs to the technical field of on-line monitoring of power equipment, and particularly relates to an on-line monitoring device and method for leakage current of a lightning arrester of a power transmission line.
Background
Metal Oxide Arresters (MOAs) are important protective electrical appliances for protecting the insulation of power transmission and transformation equipment from overvoltage. The method has an important protection effect on the safe operation of the power system.
The transmission line is a high-speed area of lightning disasters, and no matter direct lightning strikes or inductive lightning strikes, the transmission facility can be damaged. In recent years, the metal oxide arrester is widely applied to lightning protection of a power transmission line, effectively limits overvoltage of a power grid, and improves power supply reliability. However, the lightning arrester is prone to aging due to long-term bearing of power frequency voltage and impulse voltage and the influence of various external environmental factors, so that the insulating property of the lightning arrester is damaged, and some lightning arresters even explode, thereby influencing the reliability and safety of power supply. At present, the conventional periodical preventive test is mostly adopted at home and abroad to detect the lightning arrester, and the deterioration speed of the metal oxide lightning arrester is aggravated after the performance of the metal oxide lightning arrester changes to a certain degree, so that the fault of the lightning arrester cannot be timely monitored by adopting the conventional pre-test method, and the sudden accident is caused.
Currently, there are two ways of on-line monitoring technology and regular inspection of portable equipment for lightning arrester live detection. The mode of regularly patrolling and examining the portable equipment is adopted, the running state of the lightning arrester cannot be timely and effectively obtained, the state of the lightning arrester can be detected in real time by adopting online monitoring, the obtained data volume is large, the influence of weather and the like is small, and the advantages are obvious. However, from the service condition of the on-line equipment of the lightning arrester installed at present, most of the devices only monitor the leakage current of the lightning arrester, and lack the monitoring of the climate environment, and meanwhile, the existing equipment does not have the capability of quickly sampling the instantaneous signal when the lightning strike signal occurs, and the working state of the lightning arrester cannot be effectively analyzed through multi-data fusion.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides an online monitoring device and method for leakage current of a lightning arrester of a power transmission line. The problem of leakage current on-line monitoring of the line arrester is solved, and the method is mainly focused on the aspects of leakage current acquisition precision, environment monitoring, system stability improvement and the like.
The technical scheme adopted by the invention for solving the technical problems is as follows:
an online leakage current monitoring device for a lightning arrester of a power transmission line is characterized in that a leakage current inflow end in a monitoring main board of the lightning arrester of the power transmission line is connected with a tail screen of the monitoring main board of the lightning arrester of the power transmission line, and a leakage current outflow end in the monitoring main board of the lightning arrester of the power transmission line is connected between tower grounds; the output of power management module is connected with the input of line arrester monitoring mainboard, and power management module input is connected with solar cell panel's output, power management module and battery both way junction.
The leakage current inflow end in the line arrester monitoring main board is connected in series to the end screen of the line arrester, and the leakage current outflow end in the line arrester monitoring main board is connected in series to the tower ground.
The power management module is connected with the solar cell panel through a cable, and stores the energy acquired by the solar cell panel into the storage battery; the power supply management module is connected with the storage battery through a cable, so that the charging and discharging management of the storage battery is realized; the power management module is connected with the line arrester monitoring main board through a cable to provide electric energy required by operation for the line arrester monitoring main board.
The online monitoring device for the leakage current of the lightning arrester of the power transmission line and the remote server transmit data through a GPRS network, wherein the leakage current of the lightning arrester, lightning stroke signal information and environment temperature and humidity are collected through a monitoring mainboard of the lightning arrester of the power transmission line, and the collected information is sent to the remote server.
Line arrester monitoring mainboard includes: the processor circuit is respectively connected with the mutual inductor, the signal conditioning circuit, the remote communication circuit, the reset logic circuit and the temperature and humidity acquisition circuit in a bidirectional way through lines; the output ends of the mutual inductor and the signal conditioning circuit are connected with the input end of the lightning stroke signal trigger circuit through a circuit; the processor circuit is also connected with the lightning stroke signal trigger circuit through a circuit; the output end of the reset logic circuit is also connected with the input end of the remote communication circuit and the input end of the power supply and protection circuit respectively.
The mutual inductor and the signal conditioning circuit adopt a variable gain amplifier.
A method for monitoring a leakage current on-line monitoring device of a lightning arrester of a power transmission line comprises the following steps:
leakage current of the lightning arrester is injected into the mutual inductor and the signal conditioning circuit through a cable connected with the end screen of the lightning arrester, flows through the lightning stroke signal trigger circuit and flows out of the tower through the output end of the lightning stroke signal trigger circuit;
the temperature and humidity acquisition circuit transmits acquired temperature and humidity signals to the processor circuit;
the processor circuit sends the received temperature and humidity signals, lightning arrester leakage current data and accumulated lightning stroke times to the remote communication circuit;
the remote communication circuit transmits the received data of the processor circuit to a remote server through a GPRS network.
Under the condition that the leakage current of the lightning arrester does not meet a lightning stroke signal, the leakage current of the lightning arrester passes through the mutual inductor and the signal conditioning circuit, and then the acquired single leakage current is transmitted to the processor circuit;
when the leakage current of the lightning arrester meets a lightning stroke signal, the lightning stroke signal trigger circuit transmits the trigger signal to the processor circuit, and the processor circuit controls the mutual inductor and the signal conditioning circuit to rapidly acquire the leakage current data after the lightning stroke for a plurality of times continuously and to accumulate the lightning stroke times.
The processor circuit and the reset logic circuit complete multiple reset functions for the remote communication circuit.
Further, when the processor circuit tests that the remote communication circuit can not be connected to the GPRS network, the processor circuit firstly controls the remote communication circuit to reconnect the GPRS network;
if the reconnection fails, the processor circuit sends a reset signal to the remote communication circuit, and the remote communication circuit executes reset operation and then reconnects the GPRS network;
if reconnection still fails, the processor circuit controls the reset logic circuit to cut off the power supply loop of the remote communication circuit for more than 3 seconds, and the remote communication circuit is restarted and then connected with the GPRS network;
if the reconnection still fails, the processor circuit controls the reset logic circuit, the power supply and the protection circuit to cut off the power supply of the whole system for more than 3 seconds, and then the system is restarted.
The invention has the advantages and beneficial effects that:
the invention relates to an on-line monitoring device for leakage current of a transmission line arrester, which adopts solar power supply and GPRS (general packet radio service) to carry out remote data transmission, thereby realizing on-line monitoring on the line arrester. And a leakage current signal of the line arrester is obtained through the transformer conditioning circuit. Meanwhile, when lightning strike occurs, the lightning arrester leakage current acquisition device can quickly acquire the lightning arrester leakage current during the lightning strike, and accumulates the lightning strike times. The temperature and humidity of the working of the lightning arrester are recorded through the temperature and humidity acquisition circuit. According to the method, the working data of the line arrester is obtained, so that the performance evaluation of the arrester by a remote end is more reliable and accurate, data support is provided for the state evaluation of the line arrester, the working strength of operation and maintenance personnel of the power transmission line is effectively reduced, and the method plays a positive role in improving the running stability of the power transmission line.
Drawings
The invention will be described in further detail with reference to the drawings and specific embodiments for facilitating understanding and practicing of the invention by those of ordinary skill in the art, but it should be understood that the scope of the invention is not limited by the specific embodiments.
FIG. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a schematic structural diagram of the line arrester leakage current monitoring main board according to the present invention.
In the figure: the circuit lightning arrester monitoring system comprises a circuit lightning arrester monitoring mainboard 1, a power management module 2, a solar cell panel 3, a storage battery 4, a mutual inductor and signal conditioning circuit 5, a lightning stroke signal trigger circuit 6, a remote communication circuit 7, a processor circuit 8, a reset logic circuit 9, a power supply and protection circuit 10 and a temperature and humidity acquisition circuit 11.
Detailed Description
The invention discloses an on-line monitoring device for leakage current of a lightning arrester of a power transmission line, which is shown in figure 1, wherein figure 1 is a schematic diagram of the overall structure of the on-line monitoring device, and the on-line monitoring device comprises a monitoring main board 1 of the lightning arrester of the power transmission line, a power management module 2, a solar cell panel 3 and a storage battery 4.
The online monitoring device for the leakage current of the lightning arrester of the power transmission line and the remote server transmit data through the GPRS network. The leakage current inflow end in the line arrester monitoring main board 1 is connected in series to the end screen of the line arrester, and the leakage current outflow end in the line arrester monitoring main board 1 is connected in series to the tower ground; the lightning arrester leakage current and lightning stroke signal information can be collected through the line lightning arrester monitoring main board 1, and the collected information is sent to a remote server.
The line arrester monitoring main board 1 can collect a line arrester leakage current signal, a lightning stroke signal and environment temperature and humidity. When the thunderbolt takes place, the lightning arrester leakage current when the circuit lightning arrester monitoring mainboard 1 can be struck to the thunderbolt carries out quick collection.
The power management module 2 is connected with the solar cell panel 3 through a cable, and the energy acquired by the solar cell panel 3 can be stored in the storage battery 4.
The power management module 2 is connected with the storage battery 4 through a cable, and charging and discharging management of the storage battery 4 can be achieved.
The power management module 2 is connected with the line arrester monitoring main board 1 through a cable, and provides electric energy required by operation for the line arrester monitoring main board 1.
The system is powered by collecting the energy provided by the solar panel 3 and storing the remaining energy in the battery 4.
The solar panel 3 is used for collecting energy.
The accumulator 4 is used to store energy and,
as shown in fig. 2, fig. 2 is a schematic structural diagram of the line arrester leakage current monitoring main board according to the present invention. The lightning protection circuit structurally comprises a mutual inductor and signal conditioning circuit 5, a lightning strike signal trigger circuit 6, a remote communication circuit 7, a processor circuit 8, a reset logic circuit 9, a power supply and protection circuit 10 and a temperature and humidity acquisition circuit 11. Wherein the mutual inductor and signal conditioning circuit 5 is bidirectionally connected with the processor circuit 8, the processor circuit 8 is bidirectionally connected with the reset logic circuit 9, the remote communication circuit 7 is bidirectionally connected with the processor circuit 8, the processor circuit 8 is bidirectionally connected with the temperature and humidity acquisition circuit 11,
the output end of the mutual inductor and signal conditioning circuit 5 is connected with the input end of the lightning stroke signal trigger circuit 6 through a line; the processor circuit 8 is respectively connected with the mutual inductor and signal conditioning circuit 5, the lightning strike signal trigger circuit 6, the remote communication circuit 7, the temperature and humidity acquisition circuit 11 and the reset logic circuit 9 through lines. The reset logic circuit 9 is connected to the remote communication circuit 7, the processor circuit 8, and the power supply and protection circuit 10, respectively. The reset logic circuit 9 is connected with the processor circuit 8 in a bidirectional way, the output end of the reset logic circuit 9 is connected with the input end of the remote communication circuit 7, and the output end of the reset logic circuit 9 is also connected with the input end of the power supply and protection circuit 10.
The mutual inductor and the signal conditioning circuit 5 adopt a variable gain amplifier, so that the measurement range of the system can be enlarged, and the acquisition precision is improved.
The reset logic circuit 9 and the processor circuit 8 can complete multiple reset functions of the remote communication circuit 7, and networking reliability of the remote communication circuit is guaranteed.
The method for monitoring the leakage current of the lightning arrester of the power transmission line by using the online monitoring device comprises the following steps of:
leakage current is injected into the mutual inductor and the signal conditioning circuit 5 through a cable connected with the end screen of the lightning arrester, then flows through the lightning stroke signal trigger circuit 6, and flows out to the tower through the output end of the lightning stroke signal trigger circuit 6.
Under the condition of not encountering lightning stroke signals, the leakage current of the lightning arrester passes through the mutual inductor and the signal conditioning circuit 5, and then the collected single leakage current is transmitted to the processor circuit 8. The lightning strike signal trigger circuit 6 transmits the trigger signal to the processor circuit 8 after encountering the lightning strike signal, and the processor circuit 8 controls the mutual inductor and the signal conditioning circuit 5 to continuously and rapidly acquire the leakage current data after the lightning strike for a plurality of times and accumulate the lightning strike times. The temperature and humidity acquisition circuit 11 transmits the acquired temperature and humidity signals to the processor circuit 8. The processor circuit 8 sends the received temperature and humidity signals, lightning arrester leakage current data and accumulated lightning stroke times to the remote communication circuit 7, and the remote communication circuit 7 sends the data of the processor circuit 8 to a remote server through a GPRS network. The power supply and protection circuit 10 provides power for the whole monitoring mainboard, and the protection circuit is used for suppressing transient pulse groups and surge signals at the input end of the power supply and protecting the stability of the system. The reset logic circuit 9 and the processor circuit 8 jointly ensure the networking stability of the remote communication circuit 7, when the processor circuit 8 tests that the remote communication circuit 7 cannot be connected to the GPRS network, the remote communication circuit 7 is controlled to reconnect the GPRS network firstly, if reconnection fails, the processor circuit 8 sends a reset signal to the remote communication circuit 7, and the remote communication circuit 7 reconnects the GPRS network after executing reset operation; if the reconnection still fails, the processor circuit 8 controls the reset logic circuit 9 to cut off the power supply loop of the remote communication circuit 7 for more than 3 seconds, the remote communication circuit 7 is restarted and then connected with the GPRS network, and if the reconnection still fails, the processor circuit 8 controls the reset logic circuit 9 and the power supply and protection circuit 10 to cut off the power supply of the whole system for more than 3 seconds, and then the system is restarted.
As described above, although the embodiments of the present invention have been described in detail, it will be apparent to those skilled in the art that many modifications are possible without substantially departing from the spirit and scope of the present invention. Therefore, such modifications are also all included in the scope of protection of the present invention.

Claims (10)

1. The utility model provides a transmission line arrester leakage current on-line monitoring device which characterized by: a leakage current inflow end in the line arrester monitoring main board is connected with a tail screen of the line arrester monitoring main board, and a leakage current outflow end in the line arrester monitoring main board is connected between pole tower grounds; the output of power management module is connected with the input of line arrester monitoring mainboard, and power management module input is connected with solar cell panel's output, power management module and battery both way junction.
2. The online monitoring device for the leakage current of the lightning arrester of the power transmission line according to claim 1, which is characterized in that: the leakage current inflow end in the line arrester monitoring main board is connected in series to the end screen of the line arrester, and the leakage current outflow end in the line arrester monitoring main board is connected in series to the tower ground.
3. The online monitoring device for the leakage current of the lightning arrester of the power transmission line according to claim 1, which is characterized in that: the power management module is connected with the solar cell panel through a cable, and stores the energy acquired by the solar cell panel into the storage battery; the power supply management module is connected with the storage battery through a cable, so that the charging and discharging management of the storage battery is realized; the power management module is connected with the line arrester monitoring main board through a cable to provide electric energy required by operation for the line arrester monitoring main board.
4. The online monitoring device for the leakage current of the lightning arrester of the power transmission line according to claim 1, which is characterized in that: the online monitoring device for the leakage current of the lightning arrester of the power transmission line and the remote server transmit data through a GPRS network, wherein the leakage current of the lightning arrester, lightning stroke signal information and environment temperature and humidity are collected through a monitoring mainboard of the lightning arrester of the power transmission line, and the collected information is sent to the remote server.
5. The online monitoring device for the leakage current of the lightning arrester of the power transmission line according to claim 1, which is characterized in that: line arrester monitoring mainboard includes: the processor circuit is respectively connected with the mutual inductor, the signal conditioning circuit, the remote communication circuit, the reset logic circuit and the temperature and humidity acquisition circuit in a bidirectional way through lines; the output ends of the mutual inductor and the signal conditioning circuit are connected with the input end of the lightning stroke signal trigger circuit through a circuit; the processor circuit is also connected with the lightning stroke signal trigger circuit through a circuit; the output end of the reset logic circuit is also connected with the input end of the remote communication circuit and the input end of the power supply and protection circuit respectively.
6. The online monitoring device for the leakage current of the lightning arrester of the power transmission line according to claim 1, which is characterized in that: the mutual inductor and the signal conditioning circuit adopt a variable gain amplifier.
7. A method for monitoring a leakage current on-line monitoring device of a lightning arrester of a power transmission line is characterized by comprising the following steps: the method comprises the following steps:
leakage current of the lightning arrester is injected into the mutual inductor and the signal conditioning circuit through a cable connected with the end screen of the lightning arrester, flows through the lightning stroke signal trigger circuit and flows out of the tower through the output end of the lightning stroke signal trigger circuit;
the temperature and humidity acquisition circuit transmits acquired temperature and humidity signals to the processor circuit;
the processor circuit sends the received temperature and humidity signals, lightning arrester leakage current data and accumulated lightning stroke times to the remote communication circuit;
the remote communication circuit transmits the received data of the processor circuit to a remote server through a GPRS network.
8. The method for monitoring the leakage current of the lightning arrester of the power transmission line according to claim 7, which is characterized in that: under the condition that the leakage current of the lightning arrester does not meet a lightning stroke signal, the leakage current of the lightning arrester passes through the mutual inductor and the signal conditioning circuit, and then the acquired single leakage current is transmitted to the processor circuit;
when the leakage current of the lightning arrester meets a lightning stroke signal, the lightning stroke signal trigger circuit transmits the trigger signal to the processor circuit, and the processor circuit controls the mutual inductor and the signal conditioning circuit to rapidly acquire the leakage current data after the lightning stroke for a plurality of times continuously and to accumulate the lightning stroke times.
9. The online monitoring device for the leakage current of the lightning arrester of the power transmission line according to claim 7, which is characterized in that: the processor circuit and the reset logic circuit complete multiple reset functions for the remote communication circuit.
10. The method for monitoring the leakage current of the lightning arrester of the power transmission line according to claim 7, which is characterized in that:
when the processor circuit tests that the remote communication circuit can not be connected to the GPRS network, firstly, the remote communication circuit is controlled to reconnect the GPRS network;
if the reconnection fails, the processor circuit sends a reset signal to the remote communication circuit, and the remote communication circuit executes reset operation and then reconnects the GPRS network;
if reconnection still fails, the processor circuit controls the reset logic circuit to cut off the power supply loop of the remote communication circuit for more than 3 seconds, and the remote communication circuit is restarted and then connected with the GPRS network;
if the reconnection still fails, the processor circuit controls the reset logic circuit, the power supply and the protection circuit to cut off the power supply of the whole system for more than 3 seconds, and then the system is restarted.
CN201911038998.3A 2019-10-29 2019-10-29 Online monitoring device and method for leakage current of lightning arrester of power transmission line Pending CN110780227A (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
CN201911038998.3A CN110780227A (en) 2019-10-29 2019-10-29 Online monitoring device and method for leakage current of lightning arrester of power transmission line

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Publication Number Publication Date
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111722065A (en) * 2020-05-21 2020-09-29 中国南方电网有限责任公司超高压输电公司检修试验中心 Limit energy tolerance test method for resistor disc of lightning arrester of direct current transfer switch
CN111934721A (en) * 2020-09-01 2020-11-13 昆明昆宝电线电缆制造有限公司 Intelligent 5G is from special signal cable that reveals in charge tunnel
CN111934721B (en) * 2020-09-01 2021-12-24 昆明昆宝电线电缆制造有限公司 Intelligent 5G is from special signal cable that reveals in charge tunnel

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111722065A (en) * 2020-05-21 2020-09-29 中国南方电网有限责任公司超高压输电公司检修试验中心 Limit energy tolerance test method for resistor disc of lightning arrester of direct current transfer switch
CN111722065B (en) * 2020-05-21 2021-08-31 中国南方电网有限责任公司超高压输电公司检修试验中心 Limit energy tolerance test method for resistor disc of lightning arrester of direct current transfer switch
CN111934721A (en) * 2020-09-01 2020-11-13 昆明昆宝电线电缆制造有限公司 Intelligent 5G is from special signal cable that reveals in charge tunnel
CN111934721B (en) * 2020-09-01 2021-12-24 昆明昆宝电线电缆制造有限公司 Intelligent 5G is from special signal cable that reveals in charge tunnel

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