CN114113768A - Distribution thunder and lightning monitoring system - Google Patents

Distribution thunder and lightning monitoring system Download PDF

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Publication number
CN114113768A
CN114113768A CN202111407067.3A CN202111407067A CN114113768A CN 114113768 A CN114113768 A CN 114113768A CN 202111407067 A CN202111407067 A CN 202111407067A CN 114113768 A CN114113768 A CN 114113768A
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CN
China
Prior art keywords
lightning
monitoring system
microprocessor unit
communication module
signal acquisition
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CN202111407067.3A
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Chinese (zh)
Inventor
李洪涛
饶强
李子衿
王存平
赵贺
郝良
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State Grid Corp of China SGCC
State Grid Beijing Electric Power Co Ltd
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State Grid Corp of China SGCC
State Grid Beijing Electric Power Co Ltd
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Priority to CN202111407067.3A priority Critical patent/CN114113768A/en
Publication of CN114113768A publication Critical patent/CN114113768A/en
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/25Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)

Abstract

The invention discloses a power distribution lightning monitoring system. The invention comprises the following steps: the signal acquisition unit is used for acquiring lightning current signals; the microprocessor unit is connected with the signal acquisition unit and used for receiving the lightning current signal and analyzing and processing the lightning current signal to obtain lightning data; the communication module is connected with the microprocessor unit and used for sending the lightning data through a communication network; and the communication terminal is connected with the communication module and used for receiving the lightning data. According to the invention, the technical problem of low efficiency of lightning monitoring and early warning means in the related technology is solved.

Description

Distribution thunder and lightning monitoring system
Technical Field
The invention relates to the field of lightning monitoring, in particular to a power distribution lightning monitoring system.
Background
Distribution network line is because insulation level is low, and the thunderbolt forms harm easily to it, leads to various faults, for example: equipment such as transformer on the post, circuit breaker on the post is struck by lightning and is damaged, bare conductor or insulated conductor lightning stroke broken string, cable head insulation breakdown, vase and arrester puncture or burst etc. have greatly influenced the power supply reliability of distribution network. Therefore, the lightning protection technology of the distribution network is a popular subject of domestic and foreign research.
Thunder and lightning is used as the primary factor of tripping of a distribution line, and the safe and stable operation of a power system is seriously influenced. According to statistics, the tripping accidents caused by lightning strike account for 40% -70% of the total tripping accidents of the distribution lines every year. Therefore, timely and accurate lightning monitoring and early warning are very important in the power industry. The lightning monitoring and early warning system is convenient, practical, rapid and accurate to establish in the area with frequent lightning activities, can predict before lightning accidents occur, can provide auxiliary decision for making distribution lines for reference in the power industry, and has great significance for effectively reducing the damage of the power grid lightning accidents.
In the aspect of monitoring and acquiring lightning information, the spatial resolution of the existing lightning positioning system is hundreds of meters, the requirement of the refined lightning information of a 10kV power distribution network is difficult to adapt to, a lightning information monitoring scheme suitable for the 10kV power distribution network line needs to be further provided, and key information such as lightning damage density, lightning current amplitude, geographical position information and the like of the area where the power distribution line is located can be provided at the same time. Therefore, the specific scheme that monitoring devices such as lightning counters and the like are configured on the lightning arrester to collect basic information such as lightning damage and the like can be researched by utilizing the existing lightning counters on the line, and then the power distribution lightning monitoring terminal is researched and developed and has the functions of recording and uploading information such as lightning stroke times, lightning current amplitude and the like. A power distribution network lightning monitoring system is established based on the monitoring terminal function, and basic lightning information is provided for differential lightning protection of a 10kV overhead line.
Berger et al 1975, in Switzerland, directly measure lightning by using high tower lightning, always used lightning protection engineering, but because the sample size for research is insufficient and the precision of the measuring instrument is far inferior to that of the existing measuring instrument, some key parameters such as the wave front rising rate need to be corrected, the existing direct lightning simulation generally adopts 10/350 mu s overvoltage waveform, the representativeness to natural lightning is poor, and the international large power grid organization (CIGRE) is considering to correct the parameters. Since 2007, China also developed a series of direct lightning strike measurement researches on ground grids in Yunnan, Shanxi, Guangzhou and the like, and the lightning current time, waveform, amplitude and polarity of the top of a lightning pole tower are obtained mainly by installing a full-waveform lightning current measuring device at a fixed point. The general direct lightning current measuring device consists of 2 lightning current sensors and a measuring host, and can monitor two paths of lightning current signals simultaneously. When the tower top drainage needle is struck by lightning, a lightning current signal is obtained by the lightning current sensor and is transmitted to the measuring host through the cable, the waveform, the amplitude and the polarity of the lightning current signal are measured by the measuring host, meanwhile, the lightning stroke time is recorded, and the measuring result is stored and transmitted. The direct measurement of the lightning current of the power facility belongs to fixed-point observation, and more measurement data need to be accumulated by increasing measurement points and enlarging the engineering application range. In addition, the currently used rogowski coil sensor is simple and practical, but lacks the measurement of direct current components. The optical fiber sensor is small in size, light in weight and capable of measuring full-frequency-band waveforms, high in precision and wide in measuring dynamic range, but high in requirements on working environment, optical devices are easy to age, and stability and measuring precision of the optical fiber sensor can be affected. Improving the sensor would be one of the developing directions to improve the accuracy and stability of lightning current measurement.
At present, lightning arresters of domestic transformer substations and power transmission lines are monitored by adopting special electromagnetic mechanical counters for lightning stroke counting. The JS-8 type motion counter shown in fig. 1 is widely used. Wherein R1 is a nonlinear resistor, C is an energy storage capacitor, L is a counter coil, and D1-D4 are silicon diodes. When the lightning arrester is struck by lightning, the voltage drop on the high-temperature valve plate R1 charges the capacitor C through the bridge rectifier, then the capacitor C discharges the coil L of the electromagnetic counter, so that the L flows through inductive current, an electromagnetic field is induced, the internal iron core is magnetized, the armature is attracted to rotate the counter pointer, and counting is finished. The mechanical lightning counter which is generally installed is installed on a line tower together with a lightning arrester, and the number of lightning strikes marked by the counter needs to be checked and recorded by line patrol personnel at regular intervals, so that a large amount of manpower and material resources are consumed, and the mechanical lightning counter is very inconvenient.
In view of the above problems in the related art, no effective solution has been proposed.
Disclosure of Invention
The invention mainly aims to provide a power distribution lightning monitoring system to solve the technical problem that lightning monitoring and early warning means in the related technology are low in efficiency.
To achieve the above object, according to one aspect of the present invention, there is provided a power distribution lightning monitoring system. The invention comprises the following steps: the signal acquisition unit is used for acquiring lightning current signals; the microprocessor unit is connected with the signal acquisition unit and used for receiving the lightning current signal and analyzing and processing the lightning current signal to obtain lightning data; the communication module is connected with the microprocessor unit and used for sending the lightning data through a communication network; and the communication terminal is connected with the communication module and used for receiving the lightning data.
Further, the signal acquisition unit includes: one end of the counter mechanical driver is connected with the lightning arrester, and the other end of the counter mechanical driver is connected with the infrared photoelectric sensor and is used for acting when the lightning arrester acts and acting on the infrared photoelectric sensor through the shading sheet; and the infrared photoelectric sensor is connected with the mechanical driver of the counter and used for acquiring lightning current signals through the action of the mechanical driver of the counter.
Further, the monitoring system further comprises: the energy taking power supply is connected with the first voltage stabilizing circuit and the second voltage stabilizing circuit and used for providing power for the first voltage stabilizing circuit and the second voltage stabilizing circuit; the first voltage stabilizing circuit is connected with the signal acquisition unit and the microprocessor unit and is used for providing a direct current power supply for the signal acquisition unit and the microprocessor unit; and the second voltage stabilizing circuit is connected with the microprocessor unit and the communication module and is used for providing direct-current power supply for the microprocessor unit and the communication module.
Further, the second voltage stabilizing circuit is connected with the microprocessor unit and the communication module through a relay.
Further, the monitoring system further comprises: the energy-taking power supply is connected with the signal acquisition unit, the microprocessor unit and the communication module and used for providing power for the signal acquisition unit, the microprocessor unit and the communication module.
Further, the monitoring system further comprises: and the database is in communication connection with the microprocessor unit and is used for receiving and storing the lightning data.
Further, the monitoring system further comprises: and the display unit is connected with the communication terminal and used for receiving and displaying the thunder and lightning data.
Further, the direct current power supply provided by the first voltage stabilizing circuit for the signal acquisition unit is 3.3V, the direct current power supply provided by the first voltage stabilizing circuit for the microprocessor unit is 5V, and the direct current power supply provided by the second voltage stabilizing circuit for the communication module is 5V.
The invention provides a power distribution lightning monitoring system, which comprises the following parts: the signal acquisition unit is used for acquiring lightning current signals; the microprocessor unit is connected with the signal acquisition unit and used for receiving the lightning current signal and analyzing and processing the lightning current signal to obtain lightning data; the communication module is connected with the microprocessor unit and used for sending the lightning data through a communication network; the communication terminal is connected with the communication module and used for receiving lightning data, the technical problem that the lightning monitoring and early warning means in the related technology is low in efficiency is solved, and the technical effect of early warning of lightning accidents is achieved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram of a schematic wiring diagram of a JS-8 type action counter in the related art;
FIG. 2 is a schematic diagram of a power distribution lightning monitoring terminal provided in accordance with the present invention;
FIG. 3 is a schematic diagram of a power distribution lightning monitoring system provided by an embodiment of the present application;
FIG. 4 is a schematic diagram of a power distribution lightning monitoring system provided in accordance with another embodiment of the present application;
wherein the following reference numerals are included:
10, a signal acquisition unit; 20, a microprocessor unit; 30, a communication module; 40, a communication terminal;
50, taking an energy power supply; 60, a first voltage stabilizing circuit; 70, a second voltage stabilizing circuit; 80, a relay;
101, a counter mechanical driver; 102, infrared photoelectric sensor.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged under appropriate circumstances in order to facilitate the description of the embodiments of the invention herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
According to an embodiment of the invention, a power distribution lightning monitoring system is provided.
Fig. 2 is a schematic diagram of a power distribution lightning monitoring terminal provided according to the invention. As shown in fig. 2, the power distribution lightning monitoring terminal based on the existing lightning counter comprises the following parts: the system comprises a signal acquisition unit 10, a microprocessor unit 20, a communication module 30 and an energy-obtaining power supply 50.
Specifically, the signal collecting unit 10 is used for collecting lightning current signals.
As shown in fig. 2, the terminal comprises a mechanical driver 101 of the counter, an infrared photoelectric sensor 102, a microprocessor unit 20, a communication module 30, a communication terminal 40, a voltage regulator circuit (including a first voltage regulator circuit 60 and a second voltage regulator circuit 70), and an energy-taking power supply 50.
Specifically, the microprocessor unit 20 is connected to the signal acquisition unit 10, and is configured to receive the lightning current signal and analyze and process the lightning current signal to obtain lightning data.
Specifically, the communication module 30 is connected to the microprocessor unit 20, and is configured to transmit the lightning data through a communication network.
In the above, when lightning strikes on the tower top current guide pin, the lightning current sensor obtains a lightning current signal, and transmits the signal to the microprocessor unit 20 through the cable, and the microprocessor unit 20 measures the waveform, amplitude and polarity of the lightning current signal, records the lightning strike time, and stores the measurement result and transmits the result through the communication module 30.
According to the power distribution thunder and lightning monitor terminal provided by the application, through the remote information transmission function of increasing the lightning stroke times, the line patrol frequency of workers is reduced, the work efficiency is improved, the data storage and processing are convenient, the real-time and accurate lightning stroke warning is finally realized, and the quick and efficient overhaul and maintenance of equipment are guaranteed.
Meanwhile, when parameters such as positioning accuracy and detection efficiency are used as technical indexes for evaluating the lightning monitoring network, practical indexes with the lightning flashover detection rate of the power grid being more than 90% need to be achieved.
Specifically, the communication terminal 40 is connected to the communication module 30 for receiving the lightning data.
In the above-mentioned ground, the communication terminal 40 receives the lightning data measured by the lightning monitoring system, and collects the received lightning data to form a distribution network lightning database.
Specifically, the signal acquisition unit 10 includes: a counter mechanical driver 101, one end of which is connected with the lightning arrester, the other end of which is connected with the infrared photoelectric sensor, and is used for acting when the lightning arrester acts and acting on the infrared photoelectric sensor through a shading sheet; and the infrared photoelectric sensor 102 is connected with the counter mechanical driver 101 and is used for acquiring lightning current signals through the action of the counter mechanical driver 101.
As described above, the infrared photoelectric sensor 102 is a sensor that performs data processing using infrared rays, and has advantages such as high sensitivity.
The mechanical driver 101 of the counter acts on the infrared photoelectric sensor through the light shielding sheet to complete the signal acquisition and output functions. On the basis of the three systems of the drawing, the lightning stroke monitoring of the power distribution network mainly realizes the direct measurement of lightning characteristic parameters through a distributed lightning stroke fault monitoring technology, an optical observation technology and a direct lightning stroke measurement technology. In the direct lightning strike measurement technology, a current measurement sensor (a Rogowski coil, a coaxial shunt and the like) is arranged on a high-tower-height building or a transmission tower to realize high-precision measurement of lightning current waveforms.
In an optional embodiment, the monitoring system further comprises: the energy taking power supply 50 is connected with the first voltage stabilizing circuit 60 and the second voltage stabilizing circuit 70 and is used for providing power for the first voltage stabilizing circuit 60 and the second voltage stabilizing circuit 70; the first voltage stabilizing circuit 60 is connected to the signal acquisition unit 10 and the microprocessor unit 20, and is configured to provide a direct current power supply for the signal acquisition unit 10 and the microprocessor unit 20; the second voltage stabilizing circuit 70 is connected to the microprocessor unit 20 and the communication module 30, and is configured to provide a dc power supply for the microprocessor unit 20 and the communication module 30, wherein the second voltage stabilizing circuit 70 is connected to the microprocessor unit 20 and the communication module 30 through a relay 80. As shown in fig. 2, fig. 3 is a schematic diagram of a distribution lightning monitoring system according to an embodiment of the present disclosure, in which a voltage stabilizing circuit is disposed, and under the action of the voltage stabilizing circuit, the monitoring system can be in a relatively stable state, so as to improve the stability of the monitoring system.
In another optional embodiment, the monitoring system further comprises: the energy-obtaining power supply 50 is connected with the signal acquisition unit 10, the microprocessor unit 20 and the communication module 30, and is used for providing power for the signal acquisition unit 10, the microprocessor unit 20 and the communication module 30, and the energy-obtaining power supply 50 provides energy support for each module and unit of the monitoring system, so that the structure of the whole monitoring system is simplified, as shown in fig. 4, fig. 4 is a schematic diagram of a power distribution lightning monitoring system provided by another embodiment of the present application.
Specifically, the monitoring system further comprises: and the database is in communication connection with the microprocessor unit 20 and is used for receiving and storing the lightning data.
Specifically, the monitoring system further comprises: and a display unit connected with the communication terminal 40 for receiving and displaying the lightning data.
In the above way, the monitoring system reads the latest basic data from the local area network, records the latest basic data into the established database, and performs the functions of analysis conversion and data visualization of the system background.
Furthermore, the lightning data are displayed on the display unit, so that the reading and the judgment of workers are facilitated.
Specifically, the first voltage stabilizing circuit 60 provides 3.3V of dc power for the signal acquisition unit 10, the first voltage stabilizing circuit 60 provides 5V of dc power for the microprocessor unit 20, and the second voltage stabilizing circuit 70 provides 5V of dc power for the communication module 30.
The energy-taking power supply is matched with the voltage stabilizing circuit to respectively provide a matched direct current power supply for each circuit of the monitoring system, and the input end and the output end of the voltage monitoring circuit are respectively connected with the energy-taking power supply and the microprocessor unit.
The embodiment of the invention provides a power distribution lightning monitoring terminal based on a conventional lightning counter, which comprises a signal acquisition unit 10, a lightning current detection unit and a lightning current detection unit, wherein the signal acquisition unit is used for acquiring lightning current signals; the microprocessor unit 20 is connected with the signal acquisition unit 10 and used for receiving the lightning current signal and analyzing and processing the lightning current signal to obtain lightning data; a communication module 30 connected to the microprocessor unit 20 for transmitting the lightning data through a communication network; the communication terminal 40 is connected with the communication module 30 and used for receiving the lightning data, so that the technical problem of low efficiency of lightning monitoring and early warning means in the related technology is solved. And further the effect of reducing the damage of the lightning stroke accident of the power grid is achieved.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (8)

1. A power distribution lightning monitoring system, comprising:
the signal acquisition unit (10) is used for acquiring lightning current signals;
the microprocessor unit (20) is connected with the signal acquisition unit (10) and is used for receiving the lightning current signal and analyzing and processing the lightning current signal to obtain lightning data;
a communication module (30) connected to the microprocessor unit (20) for transmitting the lightning data over a communication network;
a communication terminal (40) connected with the communication module (30) for receiving the lightning data.
2. The monitoring system according to claim 1, wherein the signal acquisition unit (10) comprises:
a counter mechanical driver (101), one end of which is connected with the lightning arrester, the other end of which is connected with the infrared photoelectric sensor, and is used for acting when the lightning arrester acts, and acting the action on the infrared photoelectric sensor through a shading sheet;
and the infrared photoelectric sensor (102) is connected with the mechanical driver (101) of the counter and is used for acquiring the lightning current signal through the action of the mechanical driver (101) of the counter.
3. The monitoring system of claim 1, further comprising:
the energy taking power supply (50) is connected with the first voltage stabilizing circuit (60) and the second voltage stabilizing circuit (70) and is used for providing power for the first voltage stabilizing circuit (60) and the second voltage stabilizing circuit (70);
the first voltage stabilizing circuit (60) is connected with the signal acquisition unit (10) and the microprocessor unit (20) and is used for providing a direct current power supply for the signal acquisition unit (10) and the microprocessor unit (20);
the second voltage stabilizing circuit (70) is connected with the microprocessor unit (20) and the communication module (30) and is used for providing direct current power for the microprocessor unit (20) and the communication module (30).
4. The monitoring system according to claim 3, characterized in that said second stabilizing circuit (70) is connected to said microprocessor unit (20) and to said communication module (30) by means of a relay (80).
5. The monitoring system of claim 1, further comprising:
the energy-taking power supply (50) is connected with the signal acquisition unit (10), the microprocessor unit (20) and the communication module (30) and is used for providing power for the signal acquisition unit (10), the microprocessor unit (20) and the communication module (30).
6. The monitoring system of claim 1, further comprising:
and the database is in communication connection with the microprocessor unit (20) and is used for receiving and storing the lightning data.
7. The monitoring system of claim 1, further comprising:
and the display unit is connected with the communication terminal (40) and is used for receiving and displaying the lightning data.
8. The monitoring system according to claim 3, wherein the first voltage regulating circuit provides 3.3V of the DC power supply to the signal acquisition unit (10), the first voltage regulating circuit provides 5V of the DC power supply to the microprocessor unit (20), and the second voltage regulating circuit provides 5V of the DC power supply to the communication module (30).
CN202111407067.3A 2021-11-24 2021-11-24 Distribution thunder and lightning monitoring system Pending CN114113768A (en)

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CN202111407067.3A CN114113768A (en) 2021-11-24 2021-11-24 Distribution thunder and lightning monitoring system

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Application Number Priority Date Filing Date Title
CN202111407067.3A CN114113768A (en) 2021-11-24 2021-11-24 Distribution thunder and lightning monitoring system

Publications (1)

Publication Number Publication Date
CN114113768A true CN114113768A (en) 2022-03-01

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101871964A (en) * 2010-06-18 2010-10-27 中国电力科学研究院 Remote counter for lightning arrester
KR20110139936A (en) * 2010-06-24 2011-12-30 (주)인투비 Wireless monitoring system for lightning
CN104316754A (en) * 2014-11-06 2015-01-28 重庆大学 Thunder and lightning counter remote monitoring early warning system and method
CN111830317A (en) * 2020-08-17 2020-10-27 国网河南省电力公司濮阳供电公司 Lightning arrester for power transmission line

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101871964A (en) * 2010-06-18 2010-10-27 中国电力科学研究院 Remote counter for lightning arrester
KR20110139936A (en) * 2010-06-24 2011-12-30 (주)인투비 Wireless monitoring system for lightning
CN104316754A (en) * 2014-11-06 2015-01-28 重庆大学 Thunder and lightning counter remote monitoring early warning system and method
CN111830317A (en) * 2020-08-17 2020-10-27 国网河南省电力公司濮阳供电公司 Lightning arrester for power transmission line

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
胡国辉 等: "架空线路雷电计数器远程监测系统研究", 电气应用, no. 1, pages 472 - 478 *

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