CN111650459A - Wireless passive online monitor with gap lightning arrester - Google Patents
Wireless passive online monitor with gap lightning arrester Download PDFInfo
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- CN111650459A CN111650459A CN202010527302.XA CN202010527302A CN111650459A CN 111650459 A CN111650459 A CN 111650459A CN 202010527302 A CN202010527302 A CN 202010527302A CN 111650459 A CN111650459 A CN 111650459A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/17—Indicating 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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing 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
- G01R31/1227—Testing 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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Thermistors And Varistors (AREA)
Abstract
The invention relates to a wireless passive online monitor with a gap arrester, which comprises a monitor module, a leakage current acquisition module, a control module and a Lora data transmission module, wherein the monitor module is connected with the leakage current acquisition module; leakage current collection module with monitor module connects, control module connects leakage current collection module, the Lora number passes the module with monitor module wireless connection, the Lora number passes the module with control module connects. According to the invention, the passive wireless intelligent lightning arrester counter collects data such as leakage current, discharge times and discharge time of the lightning arrester, and transmits the state sensing information of the lightning arrester to the data sink node in a LoRa wireless communication mode, so that the digitization of the state detection of the lightning arrester is realized, the upgrade of the traditional online monitoring of the lightning arrester is completed, and the lightning arrester is stable and reliable.
Description
Technical Field
The invention relates to the technical field of lightning arresters, in particular to a wireless passive online monitor with a gap lightning arrester.
Background
The lightning arrester applied to the power transmission and transformation line tower is generally divided into a discharge gap lightning arrester and a gapless lightning arrester, wherein the discharge gap is mainly a protection lightning arrester; when the lightning stroke voltage exceeds the value which can be protected by the lightning arrester, a discharge gap is arranged for preventing the lightning arrester from being broken down and damaged; when there is very high lightning strike voltage, the gap is broken down and discharged, thereby protecting the lightning arrester. This scheme is currently being widely applied in the field of high voltage power transmission and transformation.
The leakage current of the gap arrester is very small when the gap arrester normally works, and from the view of different arrester manufacturer parameters, the leakage current of a new arrester is no longer between dozens and hundreds of microamperes, and along with the increase of the number of times of lightning strikes in the use process of the arrester, the leakage current of the arrester is also increased, and when the leakage current is increased to milliampere level, the replacement of the arrester is basically required. Therefore, the detection of the leakage current of the lightning arrester becomes an important index for determining the operating state of the lightning arrester.
The traditional lightning arrester online monitoring leakage current mainly passes through a mechanical pointer type milliammeter, although the current can be seen in the scheme, manual timing meter reading records are needed, and due to the fact that the installation heights of certain towers are high, the distance is far away, a telescope is needed to read the meter, great inconvenience is brought to statistical work, and a wireless passive stable and reliable lightning arrester online monitor is designed to have great prospect in the digital process today.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: in order to solve the problems existing in the traditional lightning arrester online monitoring of leakage current, the invention provides a wireless passive online monitor with a gap lightning arrester, which realizes the digitization of the lightning arrester state detection.
In order to achieve the purpose, the invention provides the following technical scheme: the invention provides a wireless passive on-line monitor with a gap arrester, which comprises
The monitor module is used for monitoring the leakage current, the discharge times and the discharge time of the gap arrester;
the leakage current acquisition module is connected with the monitor module and is used for providing power supply for the monitor module by the acquired leakage current in an electromagnetic induction mode;
the control module is connected with the leakage current acquisition module and is used for finishing DA conversion on leakage current so as to acquire the current leakage current;
the system comprises a Lora data transmission module, the Lora data transmission module is wirelessly connected with a monitor module, the Lora data transmission module is connected with a control module and used for sending data monitored by the monitor module to the control module in a Lora wireless transmission mode.
Further, the monitor module comprises an input terminal ACIN _ FPIN and an output terminal ACIN _ WK, and a current series circuit and a voltage dependent resistor protection circuit are arranged between the input terminal ACIN _ FPIN and the output terminal ACIN _ WK in parallel. The current series circuit is used for taking electricity and storing electric energy, and is used for detecting leakage current and lightning stroke counting, and the voltage dependent resistor protection circuit prevents overvoltage.
Further, the leakage current collection module comprises a terminal BLQ2 and a terminal QDL, wherein the terminal BLQ2 and the terminal QDL are both connected with a two-stage amplification circuit, and the two-stage amplification circuit is connected with the control module. And the induced current from the monitor module is amplified through the two-stage amplifying circuit, and DA conversion is completed through the control module, so that the current leakage current is obtained.
Further, the control module comprises a single chip microcomputer U2 and an internet service provider ISP, wherein a terminal 1 of the internet service provider ISP is connected with a +3.3V power supply, a terminal 4 of the internet service provider ISP is grounded, terminals 2 and 3 of the internet service provider ISP are respectively connected with terminals 9 and 10 of the single chip microcomputer U2, terminals 1, 2, 12, 13, 14, 15 and 16 of the single chip microcomputer U2 are all connected with the Lora data transmission module, a terminal 6 of the single chip microcomputer U2 is connected with the +3.3V power supply, a terminal 8 of the single chip microcomputer U2 is grounded, a capacitor C1 is connected between terminals 6 and 8 of the single chip microcomputer U2, and a terminal 7 of the single chip microcomputer U2 is grounded after being connected with a resistor R23 and a light emitting diode D4 in series. The control module plays a role in data aggregation and uploads the data to the Internet service provider ISP, the Internet service provider ISP establishes a data service system, collects, processes and stores information, regularly maintains and updates the information, and provides information content service for users through a network.
Further, the Lora number passes the module and includes triode Q1, linear voltage regulation module and Lora module M1, triode Q1's base passes through resistance R3 and connects the control module, and its collector is connected Lora module M1's terminal 3, its projecting pole connects +3.3V power, Lora module M1's terminal 1 connects ANT wiring end J3, and its terminal 2, 9 and 16 all ground connection, and its terminal 4, 5, 12, 13, 14 and 15 all connect the control module, ground connection behind the terminal 3 connection electric capacity C3 of Lora module M1. The linear voltage stabilizing module provides electric energy for the monitor module, and the control module controls the conduction of the triode Q1, so that the Lora module is started to send data once.
The invention has the beneficial effects that: the invention provides a wireless passive online monitor with a gap arrester, which is characterized in that a passive wireless intelligent arrester counter collects data such as leakage current, discharge times, discharge time and the like of the arrester, and transmits the state sensing information of the arrester to a data aggregation node in a LoRa wireless communication mode, so that the state detection of the arrester is digitized, the upgrading of the traditional online monitoring of the arrester is completed, and the wireless passive online monitor is stable and reliable.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a functional block diagram of the present invention;
FIG. 2 is a circuit diagram of a monitor module;
FIG. 3 is a circuit diagram of a leakage current collection module;
FIG. 4 is a circuit diagram of a control module;
fig. 5 is a circuit diagram of the Lora data transmission module.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
As shown in figure 1, the invention provides a wireless passive online monitor with gap lightning arrester, which comprises
The monitor module is used for monitoring the leakage current, the discharge times and the discharge time of the gap arrester;
the leakage current acquisition module is connected with the monitor module and is used for providing power supply for the monitor module by the acquired leakage current in an electromagnetic induction mode;
the control module is connected with the leakage current acquisition module and is used for finishing DA conversion on leakage current so as to acquire the current leakage current;
the system comprises a Lora data transmission module, the Lora data transmission module is wirelessly connected with a monitor module, the Lora data transmission module is connected with a control module and used for sending data monitored by the monitor module to the control module in a Lora wireless transmission mode.
As shown in fig. 2, the monitor module includes an input terminal ACIN _ FPIN and an output terminal ACIN _ WK, between which a current series circuit and a voltage dependent resistor protection circuit are disposed in parallel. 10D330K is the piezo-resistor protection circuit, prevents the excessive pressure, can connect a arrester valve block in parallel at the piezo-resistor periphery simultaneously and play double overvoltage protection. J101 is mechanically counted, Ma + and Ma-are connected with a milliammeter, 2 TV1013-1H W-shaped inductors and 2Ma/2Ma voltage transformers are connected in series in the whole current loop, wherein L1 is used for taking electricity, the electric energy is stored in a farad capacitor C2 through the one-way conductivity of a rectifier bridge SS14, and L2 is used for detecting leakage current and lightning stroke counting.
As shown in fig. 3, the leakage current collecting module includes a terminal BLQ2 and a terminal QDL, both the terminal BLQ2 and the terminal QDL are induced currents on the inductor L2 in fig. 2, both the terminal BLQ2 and the terminal QDL are connected to a two-stage amplifying circuit, and the two-stage amplifying circuit is connected to the control module. The induced current from the delta inductor L2 is amplified through the two-stage amplifying circuit, DA conversion is completed through the control module, and therefore the current leakage current is obtained.
As shown in fig. 4 and 5, the control module includes a single chip microcomputer U2 and an internet service provider ISP, the single chip microcomputer U2 employs STC15W408AS, a terminal 1 of the internet service provider ISP is connected to a +3.3V power supply, a terminal 4 of the internet service provider ISP is grounded, terminals 2 and 3 of the internet service provider ISP are connected to terminals 9 and 10 of STC15W408AS, a terminal 6 of STC15W408AS is connected to a +3.3V power supply, a terminal 8 of STC15W408AS is grounded, a capacitor C1 is connected between terminals 6 and 8 of STC15W408AS, and a terminal 7 of STC15W408AS is grounded after being connected to a series resistor R23 and a light emitting diode D4. The control module plays a role in data aggregation and uploads the data to the Internet service provider ISP, the Internet service provider ISP establishes a data service system, collects, processes and stores information, regularly maintains and updates the information, and provides information content service for users through a network.
The Lora digital transmission module comprises a triode Q1, a linear voltage stabilizing module and an Anxin Ra-01Lora module M1, the base of the triode Q1 is connected with a terminal 2 of the STC15W408AS through a resistor R3, the collector of the triode Q1 is connected with a terminal 3 of the Anxin Ra-01Lora module M1, the emitter of the triode Q1 is connected with a +3.3V power supply, a terminal 1 of the Anxin Ra-01Lora module M1 is connected with an ANT terminal J3, terminals 2, 9 and 16 of the Anxin Ra-01Lora module M1 are all grounded, terminals 4, 5, 12, 13, 16 and 1 of the STC15W408AS are respectively connected with terminals 13, 12, 14, 15, 16 and 1, and a terminal 3 of the Anxin Ra-01Lora module M1 is connected with a capacitor C3 and then grounded. Electric energy in the farad capacitor C2 obtains a 3.3V power supply through the linear voltage-stabilizing module SC662K-3.3, the power supply end is controlled by the STC15W408AS to be conducted by the Q1, the STC15W408AS is awakened at regular time (time interval >2H), and the Lora module is started to send data once.
The invention provides a wireless passive online monitor with a gap arrester, which collects electric energy from leakage current through a voltage transformer and gathers the electric energy to a Faraday capacitor to complete charging so as to collect and send data; transmitting the acquired data of the leakage current and the lightning stroke counting to a nearby data sink node through Lora data transmission counting; the digitization of the state detection of the lightning arrester is realized, the upgrade of the traditional online monitoring of the lightning arrester is completed, and the lightning arrester is stable and reliable.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (5)
1. The utility model provides a wireless passive on-line monitoring ware of band gap arrester which characterized in that: comprises that
The monitor module is used for monitoring the leakage current, the discharge times and the discharge time of the gap arrester;
the leakage current acquisition module is connected with the monitor module and is used for providing power supply for the monitor module by the acquired leakage current in an electromagnetic induction mode;
the control module is connected with the leakage current acquisition module and is used for finishing DA conversion on leakage current so as to acquire the current leakage current;
the system comprises a Lora data transmission module, the Lora data transmission module is wirelessly connected with a monitor module, the Lora data transmission module is connected with a control module and used for sending data monitored by the monitor module to the control module in a Lora wireless transmission mode.
2. The wireless passive online monitor with gap arrestor of claim 1, wherein: the monitor module comprises an input end ACIN _ FPIN and an output end ACIN _ WK, wherein a current series circuit and a voltage dependent resistor protection circuit are arranged between the input end ACIN _ FPIN and the output end ACIN _ WK in parallel.
3. The wireless passive online monitor with gap arrestor of claim 1, wherein: the leakage current collection module comprises a terminal BLQ2 and a terminal QDL, wherein the terminal BLQ2 and the terminal QDL are connected with a two-stage amplification circuit, and the two-stage amplification circuit is connected with the control module.
4. The wireless passive online monitor with gap arrestor of claim 1, wherein: the control module comprises a single chip microcomputer U2 and an Internet service provider ISP, wherein a terminal 1 of the Internet service provider ISP is connected with a +3.3V power supply, a terminal 4 of the Internet service provider ISP is grounded, terminals 2 and 3 of the Internet service provider ISP are respectively connected with terminals 9 and 10 of a single chip microcomputer U2, terminals 1, 2, 12, 13, 14, 15 and 16 of the single chip microcomputer U2 are all connected with the Lora data transmission module, a terminal 6 of the single chip microcomputer U2 is connected with the +3.3V power supply, a terminal 8 of the single chip microcomputer U2 is grounded, a capacitor C1 is connected between terminals 6 and 8 of the single chip microcomputer U2, and a terminal 7 of the single chip microcomputer U2 is grounded after being connected with a resistor R23 and a light emitting diode D4 in series.
5. The wireless passive online monitor with gap arrestor of claim 1, wherein: the Lora number passes the module and includes triode Q1, linear voltage regulation module and Lora module M1, triode Q1's base passes through resistance R3 and connects control module, and its collecting electrode is connected Lora module M1's terminal 3, its projecting pole connects +3.3V power, Lora module M1's terminal 1 connects ANT wiring end J3, and its terminal 2, 9 and 16 are all grounded, and its terminal 4, 5, 12, 13, 14 and 15 are all connected control module, ground connection behind the terminal 3 connection electric capacity C3 of Lora module M1.
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| CN202010527302.XA CN111650459A (en) | 2020-06-11 | 2020-06-11 | Wireless passive online monitor with gap lightning arrester |
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| CN202010527302.XA CN111650459A (en) | 2020-06-11 | 2020-06-11 | Wireless passive online monitor with gap lightning arrester |
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Application publication date: 20200911 |