CN117516755A - Passive electrified temperature rise test system and test method for composite insulator - Google Patents
Passive electrified temperature rise test system and test method for composite insulator Download PDFInfo
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- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K17/00—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations
- G06K17/0022—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations arrangements or provisious for transferring data to distant stations, e.g. from a sensing device
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- G—PHYSICS
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
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- G01K1/022—Means for indicating or recording specially adapted for thermometers for recording
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/02—Means for indicating or recording specially adapted for thermometers
- G01K1/024—Means for indicating or recording specially adapted for thermometers for remote indication
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
- G01K1/143—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations for measuring surface temperatures
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- G—PHYSICS
- G01—MEASURING; TESTING
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- G01K13/00—Thermometers specially adapted for specific purposes
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
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- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
- G06K7/10297—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves arrangements for handling protocols designed for non-contact record carriers such as RFIDs NFCs, e.g. ISO/IEC 14443 and 18092
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- H—ELECTRICITY
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Abstract
The invention discloses a passive electrified temperature rise test system and a test method for a composite insulator, wherein the system comprises the following components: the system comprises an electronic tag, a reader, a receiving antenna, a transmitting antenna and a data management analysis system, wherein the electronic tag comprises a passive temperature measuring chip and a communication antenna, the reader transmits radio frequency signals with certain frequency through the transmitting antenna, when the electronic tag enters a working area of the transmitting antenna, induced current is generated, and the electronic tag obtains energy to be activated; the electronic tag sends out the self-identification and the acquired temperature information through a communication antenna; the passive live temperature rise test system receives a carrier signal sent from the electronic tag through a receiving antenna, and the carrier signal is transmitted to a reader through an antenna regulator, and the reader demodulates and decodes the received carrier signal to obtain real-time temperature data and sends the real-time temperature data to the data management analysis system; the data management analysis system is used for analyzing the real-time temperature data and judging the state of the composite insulator according to the analysis result.
Description
Technical Field
The invention relates to the technical field of composite insulator temperature rise detection, in particular to a passive live temperature rise test system and a passive live temperature rise test method for a composite insulator.
Background
The composite insulator is one of the most numerous and most diverse parts in the transmission line, and is mainly affected by partial discharge, thermal aging, ultraviolet aging, atmospheric corrosion and the like in operation, various problems are unavoidable in materials, and the safety performance of the composite insulator with long operation time can be further reduced, and the safety and stability of a power grid are seriously affected. The current temperature is still one of the important indicators for determining the operational status of the composite insulator. In the temperature measurement technology commonly used at present, the contact temperature measurement is mainly a thermocouple technology, although the technology can accurately measure the temperature, the live detection cannot be realized due to the wired connection of the sensors, the infrared temperature measurement technology commonly used for non-contact temperature measurement is greatly influenced by the field test condition, a single active wireless temperature measurement sensor is high in price, the active wireless temperature measurement sensor can partially meet the temperature measurement requirement of a composite insulator, the general volume and the weight of the sensor are large, the long-term maintenance difficulty is brought due to the fact that the battery is required to supply power, and in addition, the leakage and explosion risks are brought to the application of the battery, so that the popularization is not facilitated.
The main method for obtaining the temperature rise information of the composite insulator is an infrared point temperature or imaging technology, the temperature information of the detail part is easy to miss, the equipment is high in price, the accuracy and consistency of infrared temperature measurement are easy to be influenced by operators, environment and materials of the test surface, and finally the judgment of the running state of the composite insulator is influenced. The active wireless temperature sensor can partially meet the temperature measurement requirement of the composite insulator, but the sensor of the type is large in general volume and weight, and can bring long-term maintenance difficulty due to battery power supply, and in addition, the application of the battery can bring the risks of liquid leakage and explosion, so that the sensor is not beneficial to popularization.
Aiming at the composite insulator electrified temperature rise test system, the following problems need to be solved:
1) The problem that the sensor of the thermocouple technology cannot realize live detection due to wired connection is solved, and wireless live detection is realized.
2) The problem of infrared imaging temperature is accurate low is solved.
3) The problem that the existing sensor is active, battery power supply can bring long-term maintenance difficulty is solved, and in addition, the battery application can bring risks of liquid leakage and explosion.
Disclosure of Invention
In order to solve at least one of the problems described in the background art, the invention provides a passive live temperature rise test system and a test method for a composite insulator.
According to one aspect of the present invention, there is provided a passive live temperature rise test system for a composite insulator, comprising:
temperature rise detection device, receiving antenna, transmitting antenna and data management analysis system of composite insulator, wherein
The temperature rise detection device comprises an electronic tag and a reader, wherein the electronic tag comprises a passive temperature measurement chip and a communication antenna, the reader sends radio frequency signals with certain frequency through the transmitting antenna, and when the electronic tag enters a working area of the transmitting antenna, induced current is generated, and the electronic tag obtains energy to be activated; the electronic tag sends out the self-identification and the acquired temperature information of the composite insulator through a communication antenna; the passive live temperature rise test system receives a carrier signal sent from the electronic tag through a receiving antenna, and the carrier signal is transmitted to a reader through an antenna regulator, the reader demodulates and decodes the received carrier signal to obtain real-time temperature data, and the real-time temperature data is sent to the data management analysis system;
the data management analysis system is used for receiving the real-time temperature data uploaded by the reader, analyzing the real-time temperature data, and judging the state of the composite insulator according to the analysis result, so that early warning of the temperature is realized.
Optionally, a temperature sensing module and an a/D converter are arranged in the passive temperature measuring chip, the temperature sensing module is used for collecting temperature information of the composite insulator, and the a/D converter is used for converting signal values of the temperature sensing module into digital signals.
Optionally, the temperature sensing module comprises a temperature collector, a collecting antenna and a temperature sensor, wherein the temperature collector is used for collecting temperature data of the sensor through the collecting antenna and uploading the temperature data to the data management analysis system.
Optionally, the temperature collector comprises a DSP processor, a radio frequency transmitter module, a receiver module, a receiving/transmitting switching and antenna selecting switch module, an RS485 interface module and a power supply module.
Optionally, the DSP processor works in a time division multiple access and time division multiple access manner to collect each temperature sensor in turn.
Optionally, the passive temperature measuring chip adopts a dual-band working mode, wherein the energy acquisition of the passive temperature measuring chip adopts 2.4GHz band working and the communication of the passive temperature measuring chip adopts 800MHz band working.
Optionally, the internal radio frequency module of the reader is designed according to the ISO18000-6C standard, so that the passive temperature measuring chip is found and filtered.
Optionally, the reader is a handheld reader, and is composed of a main control module, an RF transceiver module, a display module, a real-time clock module, an expansion memory module, a USB interface module, a serial communication interface module, an ethernet interface module, a keyboard module and a power supply system.
According to a further aspect of the present invention, there is provided a testing method suitable for use in the passive live temperature rise testing system for composite insulators of claim 1, comprising:
the reader sends radio frequency signals with a certain frequency through the transmitting antenna;
when the electronic tag enters the working area of the transmitting antenna, induced current is generated, and the energy obtained by the electronic tag is activated;
the electronic tag sends out the self-identification and the acquired temperature information of the composite insulator through a communication antenna;
the passive live temperature rise test system receives a carrier signal sent from the electronic tag through a receiving antenna and transmits the carrier signal to the reader through an antenna regulator;
the reader demodulates and decodes the received carrier signals to obtain real-time temperature data, and sends the real-time temperature data to the data management analysis system;
the data management analysis system is used for receiving the real-time temperature data uploaded by the reader, analyzing the real-time temperature data, and judging the state of the composite insulator according to the analysis result, so that early warning of the temperature is realized.
Optionally, the reader internal radio frequency module is designed according to the ISO18000-6C standard.
The invention provides a system for testing the electrified temperature rise of a composite insulator, which can be conveniently installed at a specific part of the composite insulator, collect the surface temperature in an electrified manner, realize early warning of the temperature by analysis, judge the state of the composite insulator and provide an overhaul strategy.
Drawings
Exemplary embodiments of the present invention may be more completely understood in consideration of the following drawings:
fig. 1 is a schematic structural diagram of a passive live temperature rise test system for a composite insulator according to an exemplary embodiment of the present invention;
FIG. 2 is a schematic diagram of a package of a passive temperature measurement chip according to an exemplary embodiment of the present invention;
FIG. 3 is a block diagram of an implantable passive temperature measurement chip according to an exemplary embodiment of the present invention;
FIG. 4 is a schematic diagram of a dual band mode of operation provided by an exemplary embodiment of the present invention;
FIG. 5 is a diagram of an exemplary system physical architecture provided by an exemplary embodiment of the present invention;
FIG. 6 is a network block diagram of a passive live temperature rise test system provided in an exemplary embodiment of the invention;
fig. 7 is a schematic diagram illustrating the operation of a passive live temperature rise test system according to an exemplary embodiment of the present invention.
Detailed Description
Hereinafter, exemplary embodiments according to the present invention will be described in detail with reference to the accompanying drawings. It should be apparent that the described embodiments are only some embodiments of the present invention and not all embodiments of the present invention, and it should be understood that the present invention is not limited by the example embodiments described herein.
It should be noted that: the relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise.
Through researches, the RFID tag has the advantages of non-contact automatic identification, no environmental influence, wide application range and the like, and the RFID tag technology is developed greatly. The RFID tag can identify a target object, but does not have sensing capability, the MEMS sensor can measure the environmental quantities such as temperature, pressure, magnetic field or other chemical characteristics of the target object, and if the RFID tag is combined with the MEMS sensor, the functions of an RFID system can be better expanded, and the temperature rise information measurement of the composite insulator is realized.
Fig. 1 shows a schematic structural diagram of a passive live temperature rise test system for a composite insulator provided by the invention. As shown in fig. 1, a passive live temperature rise test system for a composite insulator includes: the temperature rise detection device comprises an electronic tag and a reader, wherein the electronic tag comprises a passive temperature measurement chip and a communication antenna, the reader sends radio frequency signals with a certain frequency through the transmission antenna, and when the electronic tag enters a working area of the transmission antenna, induced current is generated, and energy obtained by the electronic tag is activated; the electronic tag sends out the self-identification and the acquired temperature information of the composite insulator through a communication antenna; the passive live temperature rise test system receives a carrier signal sent from the electronic tag through a receiving antenna, and the carrier signal is transmitted to a reader through an antenna regulator, the reader demodulates and decodes the received carrier signal to obtain real-time temperature data, and the real-time temperature data is sent to the data management analysis system; the data management analysis system is used for receiving the real-time temperature data uploaded by the reader, analyzing the real-time temperature data, and judging the state of the composite insulator according to the analysis result, so that early warning of the temperature is realized.
In the embodiment of the invention, the used radio frequency identification technology is an automatic identification technology based on a wireless radio frequency communication mode. The radio frequency identification technology takes radio frequency communication and large-scale integrated circuit technology as cores, utilizes basic principles of inductive coupling and back scattering of electromagnetic waves and the like to automatically identify static and moving targets, acquires information data of the targets in real time, and realizes target tracking and information sharing in the global scope by combining with the internet technology.
The working principle of the radio frequency identification system can be divided into two types of inductive coupling and electromagnetic wave backscattering according to the signal and energy transmission modes between the reader and the tag. Inductive coupling is achieved by a spatially high-frequency alternating electromagnetic field according to the law of electromagnetic induction. The backscattering of electromagnetic wave is similar to radar model, according to the electromagnetic wave space propagation rule, the electromagnetic wave emitted by the reader is reflected after encountering the tag, and the tag sends tag information to the reader through backscattering modulation mode.
The basic workflow of the system is: the reader sends radio frequency signals with a certain frequency through the transmitting antenna, when the electronic tag enters the working area of the transmitting antenna, induced current is generated, and the electronic tag obtains energy to be activated; the electronic tag sends out information such as self identification and temperature through an antenna; the system receiving antenna receives the carrier wave signal sent from the electronic tag, and the carrier wave signal is transmitted to the reader through the antenna regulator, and the reader demodulates and decodes the received signal and then transmits the signal to the background main system for relevant processing.
Optionally, a temperature sensing module and an a/D converter are arranged in the passive temperature measuring chip, the temperature sensing module is used for collecting temperature information of the composite insulator, and the a/D converter is used for converting signal values of the temperature sensing module into digital signals.
In the embodiment of the invention, the temperature sensing module and the A/D converter are arranged in the passive temperature measuring chip, the A/D converter is used for converting the signal value of the temperature sensing module into a digital signal, and the radio frequency module in the reader is designed according to the ISO18000-6C standard to realize standard instructions such as the discovery and the filtration of the passive chip tag. The tag chip wire bonding is mainly used for hard substrate antenna tags, such as PCB and ceramic-based ultrahigh frequency tags. The tag chip is relatively distributed with two input ends, one end of the lead wire is bonded to the input end of the chip, the other end is bonded to the feed end of the antenna, and the two lead wires are approximately in a plane. A single bonding wire with the diameter of 1mil generates parasitic inductance of about 0.3n H in the 1GHz frequency band, the parasitic resistance is almost zero and can be ignored, and the influence of the length of the gold wire is small. In the 900MHz band where the UHF tag operates, the calculated impedance is about 1Ω, with little effect relative to the matching impedance of about 200Ω. Therefore, the wire bonding has little effect on the impedance matching of the tag chip and the antenna, the tag performance is hardly affected,
the ACA conductive adhesive is a mixed jelly of conductive metal particles and polymers, and is solidified under the action of pressure and heat, so that the connection between the antenna and the chip is realized. The ACA conductive paste bonding is as shown in FIG. 2, the electrical connection is achieved by physical contact between the metal particles and the antenna feed point and the chip bump, while no metallurgical bond is formed between the conductive particles, between the conductive particles and the antenna feed point, and between the conductive particles and the chip bump, and the conductive path is filled with a polymer dielectric. Thus, the junction forms a capacitance model, such that parasitic capacitance exists.
The overall frame of the chip package is formed by the HTCC ceramic housing and the metal cover plate into a closed cavity, as shown in fig. 3. The radio frequency identification chip is placed in the nitrogen environment of the closed cavity, the PAD salient points of the chip are communicated with the external ceramic antenna through the metal through holes of the metal ball and the ceramic shell, and the metal cover plate and the metal layer of the ceramic inner wall form a metal shielding metal cavity which plays a role in blocking an electric field and a magnetic field, so that the intensity of an electromagnetic field generated by the external environment in the vertical direction relative to the radio frequency identification chip is cut off. And simultaneously, electromagnetic signals excited by the radio frequency identification chip can be received and transmitted through the ceramic antenna. The structure ensures normal operation of the high-temperature environment and has the advantage of strong electromagnetic interference resistance.
Optionally, the passive temperature measuring chip adopts a dual-band working mode, wherein the energy acquisition of the passive temperature measuring chip adopts 2.4GHz band working and the communication of the passive temperature measuring chip adopts 800MHz band working.
In the embodiment of the invention, the passive temperature measuring chip of the UHF-RFID electronic tag adopts a dual-band working mode, namely, the chip energy acquisition is carried out by adopting 2.4GHz, and the chip communication is carried out by adopting 800MHz, as shown in figure 4, the problem of insufficient single-band energy supply can be solved by adopting the working mode, and the communication distance is greatly increased.
Optionally, the temperature sensing module comprises a temperature collector, a collecting antenna and a temperature sensor, wherein the temperature collector is used for collecting temperature data of the sensor through the collecting antenna and uploading the temperature data to the data management analysis system.
In the embodiment of the invention, the physical architecture of the passive live temperature rise test system comprises arrangement of energy supply modules, formulation of a communication protocol, a data analysis module and the like. By means of the internet of things technology, the substation multi-composite insulator monitoring and inspection system collects state information with identification information and has the functions of state early warning, state evaluation, overhaul suggestion and the like. The system is mainly realized by an electronic tag (comprising a passive temperature measuring chip and a communication antenna), a data reading terminal (reader) and a data management analysis system, and the physical architecture of a typical system is shown in fig. 5.
The passive live temperature rise test system adopts layered design, forms a service development and operation support environment of a transformer substation composite insulator key point temperature test technology based on a unified technical architecture, provides basic service and general service functions for various service systems, realizes information resource sharing and service coordination, and is shown in a system structure diagram in figure 6.
Optionally, the temperature collector comprises a DSP processor, a radio frequency transmitter module, a receiver module, a receiving/transmitting switching and antenna selecting switch module, an RS485 interface module and a power supply module.
Optionally, the DSP processor works in a time division multiple access and time division multiple access manner to collect each temperature sensor in turn.
In the embodiment of the invention, the temperature collector is used for collecting the temperature data of the sensor and uploading the data to the host. The temperature collector is composed of a DSP processor, a radio frequency transmitter module, a receiver module, a receiving/transmitting switching and antenna selecting switch module, an RS485 interface module and a power supply module. The DSP works in a time division multiple access and time division multiple access mode and collects all the sensors in turn.
In the embodiment of the invention, the passive live temperature rise test system adopts a background C/S architecture design, and can realize the purposes of measuring the current temperature value of the composite insulator, judging whether to alarm, recording and analyzing the collected historical temperature value, and setting the upper and lower alarm limits and the alarm function of each composite insulator. The method can analyze and sort the demands of users, and extract the temperature monitoring system according to the principles of rapidness, accuracy, convenience, good operation and identification.
Optionally, the reader is a handheld reader, and is composed of a main control module, an RF transceiver module, a display module, a real-time clock module, an expansion memory module, a USB interface module, a serial communication interface module, an ethernet interface module, a keyboard module and a power supply system.
In the embodiment of the invention, as shown in fig. 7, a reader sends a radio frequency signal with a certain frequency through a transmitting antenna, and when an electronic tag enters a working area of the transmitting antenna, induced current is generated, and the energy obtained by the electronic tag is activated; the electronic tag sends out information such as self identification and temperature through an antenna; the system receiving antenna receives the carrier wave signal sent from the electronic tag, and the carrier wave signal is transmitted to the reader through the antenna regulator, and the reader demodulates and decodes the received signal and then transmits the signal to the background main system for relevant processing.
The invention meets the actual field operation requirement of the electric company, can greatly improve the field management level of the composite insulator, saves a great deal of manpower and material resources, effectively improves the working efficiency and the maintenance quality, reduces the maintenance cost, has good social benefit and economic benefit,
the composite insulator electrified rising test system uses a non-contact automatic identification technology to avoid faults caused by contact; the reading distance is far (the furthest can reach more than 5 m); the power supply is not needed, maintenance and maintenance are not needed, the service life can be as long as 10 years, and the price is low; can realize complete sealing, thus having good waterproof, dustproof, antifouling, electromagnetic interference preventing performances and the like.
According to the invention, the traditional UHF-RFID electronic tag is added into the temperature sensing module, and meanwhile, an A/D converter is added, so that the signal value of the temperature sensing module is converted into a digital signal, and the internal radio frequency module of the reader is designed according to the ISO18000-6C standard, thereby realizing standard instructions such as the discovery and the filtration of the passive chip tag. The equipment main control module can realize operations such as multiple identity authentication on the passive chip tag based on SM7 algorithm recommended by the national password administration, so as to ensure safety, stability and high efficiency of the communication process. The outside of the equipment adopts various communication interfaces, and can realize a communication mode based on PCSC communication so as to be used by a cross-platform multi-system. The temperature sensing module, the tag chip, the antenna and the supporting capacitor are packaged to form a novel miniaturized and metal-resistant electronic tag (passive wireless temperature sensor). The UHF-RFID temperature measuring chip adopts a dual-band working mode, namely, the chip energy acquisition and the chip communication are respectively carried out by adopting 2 frequency bands, so that the problem of insufficient single-band energy supply is solved, and the communication distance is increased.
The passive temperature sensor and the reader realize the space (non-contact) coupling of radio frequency signals through the coupling element, and realize the energy transfer and the data exchange in the coupling channel according to the time sequence relationship.
The main chip of the passive temperature sensor accords with international standards ISO18000-6C and EPC Class Gen2, adopts a dual-band working mode (800 MHz and 2.4 GHz), namely, the chip energy acquisition and the chip communication are respectively carried out by adopting 2 frequency bands, thereby solving the problem of insufficient single-frequency band energy supply and improving the communication distance.
In the embodiment of the invention, the energy acquisition is a key part of the passive sensor, and converts the magnetic field energy or electromagnetic energy induced on the antenna into electric energy which can be applied internally, and also converts alternating current into direct current. The conversion efficiency directly influences the working distance of the tag chip and the accuracy of communication. Passive temperature sensors are driven by electromagnetic field energy from a handheld reader command signal, which greatly reduces the cost of the tag, but limits the read distance because the reader command signal is an instantaneous signal that provides limited energy. The invention improves the energy acquisition mode of the passive temperature sensor by combining the power temperature inspection work, wherein the passive temperature sensor chip adopts a dual-band work mode, namely, the chip energy acquisition and the chip communication are respectively carried out by adopting two frequency bands of 2.4GHz and 800 MHz. When a patrol personnel arrives at the transformer substation site, the handheld reader continuously radiates 2.4GHz electromagnetic waves to the area with the radius of about 30m, the UHF-RFID tag analog front end continuously collects and stores the energy in a longer period of time, the energy is far greater than the instantaneous energy provided by a reader command signal in a traditional mode, and when the handheld reader transmits a temperature reading command through 800MHz, the temperature data returns through an 800MHz frequency channel. Therefore, the problem of insufficient single-band energy supply is solved by the working mode, and the communication distance is increased.
In the embodiment of the invention, the handheld reader mainly comprises a main control module, an RF transceiver module, a display module, a real-time clock module, an expansion memory module, a USB interface module, a serial communication interface module, an Ethernet interface module, a keyboard module, a power supply system and the like. The patrol personnel completes the acquisition and display of the temperature information of the radio frequency tag in a certain area, stores corresponding data in a memory of the reader, and transmits the data to a background server through a serial communication interface after being connected with a computer.
In the embodiment of the invention, reasonable architecture design is carried out aiming at a passive live temperature rise test system of the whole equipment, and the reasonable architecture design comprises arrangement design of energy supply modules, formulation of communication protocols, study of data analysis modules and the like; an interactive analysis platform for multi-station hierarchical distributed data integration, storage and analysis of the transformer equipment is developed.
In the embodiment of the invention, the C/S architecture is a typical two-layer architecture, which is called Client/Server in full, namely a Client Server architecture, wherein the Client comprises one or more programs running on a user' S computer, and the number of the Server is two, one is a database Server, and the Client accesses data of the Server through database connection; the other is a Socket server, and the program of the server communicates with the program of the client through Socket.
The C/S architecture can also be considered a thick client architecture. As the client needs to implement most of the business logic and interface presentation. In such an architecture, the persistence of data is achieved by interaction with the database (typically an implementation of SQL or stored procedures) as part of the client is subject to significant stress, both because the display logic and the transaction are contained therein, thereby meeting the needs of the actual project.
In the embodiment of the invention, by analyzing the heating principle, the heating position and the corresponding possible faults of the composite insulator, the reasonable sensor deployment principle of the composite insulator is summarized, and the optimal monitoring effect is obtained on the premise of effectively reducing the consumption of the sensor, and the deployment and installation modes are divided into the following two modes:
a) Design and installation of composite insulator umbrella skirt flexible sensor
The installation process is off-line power outage installation, firstly, an umbrella skirt at a part to be installed is cleaned by an absolute ethyl alcohol cotton piece, after alcohol air drying is finished after cleaning, heat conduction silica gel is uniformly smeared on the installation, and then the flexible temperature sensor is stuck to the surface of the umbrella skirt, and no bubbles are left between the flexible sensor and the umbrella skirt.
B) Composite insulator core rod and hardware sensor design and installation
And designing a passive temperature sensor and a clamping scheme aiming at the core rod and the hardware fitting according to the actual measurement result of the temperature field of the fault insulator. When the temperature measuring position is selected, the problems of temperature measuring accuracy and operation feasibility are required to be considered.
In order to avoid influencing the surface electric field of the composite insulator and ensure that the composite insulator can still safely run after the sensor is installed, a core rod sensor clamp is prepared by adopting a PC-ABS material 3D printing forming technology, and the sensor has the advantages of ABS toughness, high strength and heat resistance of PC materials, and no influence on the surface electric field distribution of the insulator, and is installed.
And after the sensor is installed, temperature monitoring can be performed. The method is characterized in that in the safe distance of a test site, the handheld reader is close to the temperature sensor, the distance and the direction between the reader and the sensor are adjusted until stable temperature and ID data are displayed, and the temperature of the composite insulator is obtained in real time in an electrified mode.
According to the invention, a traditional UHF-RFID electronic tag is added into a temperature sensing module, an A/D converter is added, a signal value of the temperature sensing module is converted into a digital signal, and meanwhile, the temperature sensing module is respectively prepared into an anti-metal sensor suitable for hardware fitting temperature measurement and a flexible sensor suitable for umbrella skirt temperature measurement according to the temperature measurement requirement of a composite insulator to realize the temperature measurement of the composite insulator;
the core rod sensor clamp is prepared by adopting a PC-ABS material 3D printing forming technology, and has the toughness of ABS and the high strength and heat resistance of PC material without affecting the electric field distribution on the surface of the insulator;
the temperature measuring chip of the UHF-RFID electronic tag adopts a dual-band working mode, namely, the chip energy acquisition adopts 2.4GHz, and the chip communication adopts 800 MHz.
The invention adopts layered design to form a service development and operation support environment of a transformer substation composite insulator key point temperature test technology based on a unified technical architecture, provides basic service and universal service functions for various service systems, and realizes information resource sharing and service coordination. The invention refines the main functions of the passive electrified temperature rise test system:
(1) the real-time monitoring function can check the current temperature value and state (normal, early warning and the like) of each node
(2) Fault diagnosis, providing two methods of surface temperature test and relative temperature measurement to analyze the collected temperature data, graph display, etc.
(3) Historical data, queries providing all of the historical data, analysis, graphical display, and the like.
(4) Expert diagnosis alarms in real time, and directly checks relevant information of the node in the current alarm state.
(5) Device node management, which can add, delete, modify and manage all node devices.
(6) User management, which adds, deletes, edits and inquires the administrator of the system.
(7) Data are imported, and the actual measured temperature data are imported through an excel document for analysis.
The invention finally realizes:
1) The novel radio frequency chip sensor is developed, can be applied to complex electromagnetic environments, has a wireless communication distance of more than 4m, and realizes acquisition and transmission of passive temperature data of key points of the composite insulator;
2) The handheld sensor communication terminal which can be applied to the complex electromagnetic environment is developed, the handheld sensor communication terminal comprises a high-gain directional antenna, the key point temperature of the composite insulator can be accurately read in a long distance, each monitoring point has a unique ID, and the handheld sensor communication terminal can be infinitely expanded in theory;
3) And a background monitoring system is developed, massive temperature measurement data are received and processed, and warning is realized for the exceeding temperature of the composite insulator.
In conclusion, the live temperature rise test system for the composite insulator can realize the electronization, informatization and intellectualization of field operation, so that the working efficiency is improved to the greatest extent. Real-time temperature data of the composite insulator collected by the RFID temperature measuring equipment can realize abnormal prediction and early warning of the composite insulator, so that staff is prompted that the power equipment possibly fails, overhaul or replacement is arranged in advance, and larger economic loss of the composite insulator caused by sudden failure can be avoided to a certain extent.
The foregoing description has been presented for purposes of illustration and description. Furthermore, this description is not intended to limit embodiments of the invention to the form disclosed herein. Although a number of example aspects and embodiments have been discussed above, a person of ordinary skill in the art will recognize certain variations, modifications, alterations, additions, and subcombinations thereof.
Claims (10)
1. A passive live temperature rise test system for a composite insulator, comprising: temperature rise detection device, receiving antenna, transmitting antenna and data management analysis system of composite insulator, wherein
The temperature rise detection device comprises an electronic tag and a reader, wherein the electronic tag comprises a passive temperature measurement chip and a communication antenna, the reader sends radio frequency signals with certain frequency through the transmitting antenna, and when the electronic tag enters a working area of the transmitting antenna, induced current is generated, and the electronic tag obtains energy to be activated; the electronic tag sends out the self-identification and the acquired temperature information of the composite insulator through a communication antenna; the passive live temperature rise test system receives a carrier signal sent from the electronic tag through a receiving antenna, and the carrier signal is transmitted to a reader through an antenna regulator, the reader demodulates and decodes the received carrier signal to obtain real-time temperature data, and the real-time temperature data is sent to the data management analysis system;
the data management analysis system is used for receiving the real-time temperature data uploaded by the reader, analyzing the real-time temperature data, and judging the state of the composite insulator according to the analysis result, so that early warning of the temperature is realized.
2. The method of claim 1, wherein a temperature sensing module and an a/D converter are disposed in the passive temperature measuring chip, the temperature sensing module is used for collecting temperature information of the composite insulator, and the a/D converter is used for converting signal values of the temperature sensing module into digital signals.
3. The method of claim 2, wherein the temperature sensing module comprises a temperature collector, a collection antenna, and a temperature sensor, wherein the temperature collector is configured to collect temperature data of the sensor via the collection antenna and upload the temperature data to the data management analysis system.
4. The method of claim 3, wherein the temperature harvester comprises a DSP processor, a radio frequency transmitter module, a receiver module, a transmit/receive switching and antenna selection switch module, an RS485 interface module, and a power module.
5. The method of claim 4, wherein the DSP processor operates in a time division multiple access, time division multiple access manner to acquire the respective temperature sensors in turn.
6. The method of claim 1, wherein the passive thermometry chip operates in a dual band mode, wherein the passive thermometry chip energy harvesting operates in a 2.4GHz band and the passive thermometry chip communication operates in an 800MHz band.
7. The method of claim 1, wherein the reader internal radio frequency module is designed according to ISO18000-6C standard to enable discovery and filtering of passive thermometric chips.
8. The method of claim 7, wherein the reader is a handheld reader, and comprises a main control module, an RF transceiver module, a display module, a real-time clock module, an expansion memory module, a USB interface module, a serial communication interface module, an ethernet interface module, a keyboard module, and a power system.
9. A test method suitable for use in the passive live temperature rise test system for composite insulators of claim 1, comprising:
the reader sends radio frequency signals with a certain frequency through the transmitting antenna;
when the electronic tag enters the working area of the transmitting antenna, induced current is generated, and the energy obtained by the electronic tag is activated;
the electronic tag sends out the self-identification and the acquired temperature information of the composite insulator through a communication antenna;
the passive live temperature rise test system receives a carrier signal sent from the electronic tag through a receiving antenna and transmits the carrier signal to the reader through an antenna regulator;
the reader demodulates and decodes the received carrier signals to obtain real-time temperature data, and sends the real-time temperature data to the data management analysis system;
the data management analysis system is used for receiving the real-time temperature data uploaded by the reader, analyzing the real-time temperature data, and judging the state of the composite insulator according to the analysis result, so that early warning of the temperature is realized.
10. The method of claim 9, wherein the reader internal radio frequency module is designed in accordance with ISO18000-6C standard.
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| CN117952141A (en) * | 2024-03-26 | 2024-04-30 | 四川凯路威科技有限公司 | Carrier power supply type RFID tag circuit and data receiving and transmitting method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117952141A (en) * | 2024-03-26 | 2024-04-30 | 四川凯路威科技有限公司 | Carrier power supply type RFID tag circuit and data receiving and transmitting method |
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