CN102095916A - Wireless communication measuring system for current of build-in arrester - Google Patents
Wireless communication measuring system for current of build-in arrester Download PDFInfo
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- CN102095916A CN102095916A CN2010105609056A CN201010560905A CN102095916A CN 102095916 A CN102095916 A CN 102095916A CN 2010105609056 A CN2010105609056 A CN 2010105609056A CN 201010560905 A CN201010560905 A CN 201010560905A CN 102095916 A CN102095916 A CN 102095916A
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Abstract
The invention provides a wireless communication measuring system for current of a build-in arrester, which is used for measuring the current or the voltage flowing through arrester cores. The system mainly consists of multiple measuring transducers, a relay transducer, a central controller and an upper PC (Personal Computer). The system is characterized in that the measuring transducers which are respectively placed inside multiple arrester cores are in series connection with resistor discs inside the arrester, and the measuring transducers send the measured result on the current flowing through the cores inside the arrester to the relay transducer through a wireless transmission module for signal conditioning. The measuring transducers provided by the invention are built inside the arrester cores, measured parameters are all information related to the interior of the arrester, and the interference of outside information is avoided.
Description
Technical field
The present invention relates to a kind of built-in lightning arrester electric current radio communication measuring system, belong to lightning arrester current measurement field.
Background technology
According to GB11032 " AC system metal oxide arrester " standard-required, zinc oxide resistance sheet should carry out artificial accelerated aging test, must decide the size that applies the aging voltage amplitude according to its voltage distribution situation before the test, therefore measuring the voltage distribution situation of lightning arrester, is its aging key that applies the size of voltage magnitude of decision.In addition, in recent years in the electrical equipment online monitoring system that releases according to State Grid Corporation of China, the lightning arrester on-line monitoring also needs to measure the internal current of lightning arrester, measure the system of lightning arrester internal current at present, the basic optical Fiber Method that adopts is carried out, and general principles is as follows: utilize current sensor that the electric current that flows through lightning arrester core body is measured, and be converted to light signal, be sent in the upper PC by optical fiber then and handle, reach the measurement purpose.This method is widely used in the lightning arrester current measurement field because its antijamming capability is strong.But in the experiment with measuring of MOA Potential distribution in the past, obtained good application based on the equipment of optical fiber communication, but because characteristics such as many, the survey sensor of signal way of the required measurement of test and testing laboratory's distance, to draw the 20-30m long optical fiber of multichannel through numbering down when adopting this type of device measuring simultaneously, to spend great amount of manpower and time when wiring and take-up, also need additionally to provide the through hole of drawing optical fiber for pot type MOA, therefore can not seal fully, apply less than shortcomings such as rated voltages when causing testing.
In view of this, be necessary to provide a kind of built-in lightning arrester electric current radio communication measuring system, to satisfy the commercial Application needs.
Summary of the invention
The objective of the invention is: in order to solve defectives such as the wiring cost height that has lightning arrester internal current wired measuring mode now and have, length consuming time, thereby provide a kind of built-in lightning arrester electric current radio communication measuring system, measure and adopt wireless communication mode, thereby avoided complicated wiring process, and survey sensor of the present invention is built in lightning arrester inside, thereby can accurately measure the lightning arrester internal current, avoid the interference of external information.
Technical scheme of the present invention is: a kind of built-in lightning arrester electric current radio communication measuring system, be used to measure the curtage that flows through lightning arrester core body, it is mainly by a plurality of survey sensors, relay sensor, central control unit and upper PC are formed, survey sensor is identical with the relay sensor hardware configuration, by the signal collection modulation module, the A/D converting unit, control module, the power source conversion Voltage stabilizing module, wireless transport module is formed, the data that a plurality of survey sensors record are sent to relay sensor by wireless transport module, by relay sensor signal is handled the back again and be sent to central control unit by wireless transport module, central control unit is by wireless transport module, usb bus switching administrative unit, USB interface, voltage transformation module is formed, central control unit is transmitted the measuring command of upper PC to relay sensor, and receive the data that survey sensor returns, be connected by USB interface between central control unit and the upper PC, upper PC is responsible for measuring system is carried out the parameter setting, it is characterized in that, described a plurality of survey sensor is positioned over a plurality of lightning arrester core bodies inside respectively, and connect with the resistor disc of lightning arrester inside, the electric current that survey sensor flows through the inner core body of the lightning arrester that records is sent to relay sensor by wireless transport module and carries out signal condition.
Aforesaid built-in lightning arrester electric current radio communication measuring system is characterized in that the signal collection modulation module of described survey sensor and relay sensor is to utilize the small resistor sampling method to carry out signal extraction, selects the direct insertion precision resistance of 250 Ω for use.
Aforesaid built-in lightning arrester electric current radio communication measuring system, it is characterized in that, the chip that the control module of described survey sensor and relay sensor and A/D converting unit adopt is the MSP430F chip, and its inside comprises timer, serial line interface, operational amplifier, 10 A/D converters, house dog, fundamental clock, supply voltage monitoring function module.
Aforesaid built-in lightning arrester electric current radio communication measuring system, it is characterized in that, the chip that the wireless transport module of described survey sensor and relay sensor adopts is the X472 rf chip, adopts SPI synchronous serial interface communication protocol to communicate between MSP430F chip and the X472 rf chip.
Aforesaid built-in lightning arrester electric current radio communication measuring system, it is characterized in that, the power source conversion Voltage stabilizing module of the survey sensor of described survey sensor and relay sensor adopts rated voltage 3.6V, ceiling voltage 4.2V, capacity is the lithium battery power supply of 250mAh, and selects the linear voltage regulator NCP500 of fixing output to do the DC/DC conversion.
Aforesaid built-in lightning arrester electric current radio communication measuring system is characterized in that, the usb bus connect chip that described central control unit adopts is USB2 SPI, and peripheral component is 1 12M crystal and 2 electric capacity.
The invention has the beneficial effects as follows: the advantage of the application of comparing with traditional wired measuring system is embodied in: (1) high flexibility, owing to there is not the restriction of cable, can use flexibly at different local mobile workings, and be easy to test is adjusted.(2) test is arranged simply, has eliminated loaded down with trivial details work such as test site wiring, has reduced the requirement to manpower, has shortened test period.(3) the environmental restraint factor is little, and in communication range, non-conductive barrier (as body of wall, non-metal shell and stilt etc.) is very little to the use influence of system, has avoided getting through the hole, removes problems such as moving barrier.(4) low cost, with transmission mediums such as tens meters long optical fibers, cable and comparing with their matching used reception components and parts, wireless communication chips has tangible price advantage.(5) low-power consumption sends the power consumption of electromagnetic power consumption less than optical fiber communication equipment during communication, increased the service time of measuring system effectively, reduces cell charging times and prolongs its serviceable life.(6) duplex communication in order to reduce the use way of optical fiber, is adopted duplex communication in the optical fiber communication equipment, and Wireless Telecom Equipment can carry out two-way communication with upper PC, the therefore more operation of efficient stable.
Compare with existing wireless measurement, it is advantageous that: survey sensor of the present invention is built in lightning arrester core body inside, and the parameter of measurement all is the information of lightning arrester inside, has avoided the interference of external information.For lightning arrester, the lightning arrester core body inner parameter is important more than external parameter, and these parameters comprise the electric current that flows through the inner core body of lightning arrester, temperature, voltage, leakage current etc.
Description of drawings
Fig. 1 is the principle of work block diagram of the built-in lightning arrester electric current radio communication measuring system that provides of the embodiment of the invention.
Fig. 2 is the structured flowchart of survey sensor of the present invention.
Fig. 3 is the control module of survey sensor of the present invention and relay sensor and the control linkage mode synoptic diagram of the chip MSP430F that the A/D converting unit is adopted.
Fig. 4 is the signal collection modulation circuit diagram of survey sensor of the present invention.
Fig. 5 is the connection diagram of the wireless transport module and the MSP430F chip of survey sensor of the present invention.
Fig. 6 is the usb bus connect chip USB2SPI of central control unit employing of the present invention and the connection diagram of wireless transmission chip X472.
Fig. 7 is the working routine process flow diagram of survey sensor of the present invention.
Embodiment
Below in conjunction with drawings and Examples the built-in lightning arrester electric current of the present invention radio communication measuring system is described in further detail.
As shown in Figure 1, the embodiment of the invention provides a kind of built-in lightning arrester electric current radio communication measuring system, comprises a plurality of survey sensors, relay sensor, central control unit and upper PC four parts composition.The circuit part of survey sensor mainly comprises conversion of signals modulate circuit, A/D converter, control module, wireless communication module and power source conversion Voltage stabilizing module.The hardware configuration of relay sensor is identical with the structure of survey sensor.Survey sensor is positioned over lightning arrester core body inside, size and lightning arrester resistor disc consistent size, and connect with resistor disc, this survey sensor is a conductor, thus it insert the overall performance that can not influence lightning arrester.Below the technical scheme of each several part is introduced respectively:
Survey sensor adopts the small resistor sampling method to carry out signal extraction, and electric current converts voltage signal to through behind the resistance, nurses one's health by amplifier then, delivers to and carries out analog to digital conversion in the A/D converter.The precision of this part and stability directly have influence on the precision and the stability of system.The effective value of MOA input current generally 0-4mA (amplitude ± 5.656mA) between, and the range of A/D conversion chip is 0-1.5V, so the value of resistance value is 1.5/0.005656=265 Ω, selects the direct insertion precision resistance of 250 Ω for use.
Control module and A/D converter, according to measuring system low-power consumption and the little demand of volume, adopt the MSP430F single-chip microcomputer as control and processing unit, this single-chip microcomputer is a super low-power consumption microcontroller, CPU adopts 16 reduced instruction set computers on operational performance, and integrated 16 bit registers and constant generator, having shortened instruction time, register only needs a cpu clock cycle to the operation registers time; On developing instrument, support the JTAG debugging, its emulator is a very simple parallel port converter; Aspect super low-power consumption, supply voltage is between 1.8-3.6V, an activity pattern and five kinds of low-power consumption modes are provided, under 1MHz major clock 2.2V supply voltage, the working current that is in activity pattern is 250 μ A, and the electric current that is under the standby mode is 0.7 μ A, from standby mode to the time of waking up less than 1 μ s, various modes matches, and can prolong the working time and the serviceable life of battery to greatest extent.Aspect system combination, in conjunction with the high performance analog technology, its chip integration has become different functional modules such as timer, multiple serial line interface, operational amplifier, 10 A/D converters, house dog, fundamental clock, supply voltage monitoring, and abundant interrupt function, can be configured by register according to demands of applications, simplified the design of hardware widely, thereby made very little that the size of sensor can design.Peripheral module links to each other with CPU with control bus by data, address, can control and handle them easily by instruction.The concrete control linkage mode of MSP430F chip is seen accompanying drawing 3.
The transmission range of measuring system is taken all factors into consideration in the selection of wireless communication module and the power consumption of antijamming capability and survey sensor determines.Working sensor is in the pot type MOA inside that envelope is covered, and the distance of operation room is arrived between 20-40 rice in the testing ground, during test, because voltage is higher, electromagnetic interference (EMI) such as shelf depreciation is arranged.Comprehensive above factor is considered, the chip of selection 2.4G working frequency range, and penetration capacity and transmission range can both be guaranteed, and can avoid electromagnetic interference (EMI) such as shelf depreciation effectively.Wireless communication chips is selected the X472 rf chip for use, and the MSK modulation system that is an X472 low-cost monolithic aims at low-consumption wireless and uses and design in the transceiver of one.The RF transceiver is integrated configurable modulator-demodular unit of height that data transmission rate can reach 500ksps.By the forward error recovery option of opening chip integration one-tenth performance is got a promotion.X472 penetrates for processing data packets, data buffering, burst transfers of data, quality of connection demonstration, hardware CRC check, mass-sending and wireless awakening etc. provides hardware supported widely.The oscillatory circuit coupling of radio transmitting and receiving chip is very important, adopts the SPI synchronous serial interface to communicate between single-chip microcomputer and the X472.
Power pack adopts rated voltage 3.6V, and ceiling voltage 4.2V, capacity are the lithium battery power supply of 250mAh, and the operating voltage range of single-chip microcomputer and wireless module all is 1.8V-3.6V, and the standard supply voltage is 3.3V.In order to obtain stable operating voltage, select the linear voltage regulator NCP500 of fixing output to do the DC/DC conversion, the output voltage precision can reach 2.5%, thereby provides stable supply voltage for sensor.This short chip enable response time, and pressure drop is low, comprises a voltage reference unit, error amplifier, PMOS power transistor and electric current restriction and temperature limitation holding circuit.
Adopt this usb bus connect chip of USB2SPI in the hardware design of centralized control unit, itself and X472 connected mode are as shown in Figure 6.Peripheral component only needs 1 12M crystal and 2 electric capacity, and hardware connects simple.The USB2 chip is supported 4 line system SPI synchronous serial interfaces, and CS line, SCK line, DIN line and DOUT line are provided, and can realize the equipment read-write to the SPI class interface easily.
The software section of measuring system mainly shows that by survey sensor program and upper PC application configuration and graphical interfaces two parts form.Software section all adopts modular design, finishes different functions by calling of subfunction.Thereby dirigibility, legibility, maintainability and the extendibility of program have been strengthened.
The survey sensor program design: the MSP430 single-chip microcomputer uses IAR Embedded Workbench software as development platform, it can provide strong development environment for the target processor of different model, and select for each target processor provides instrument, specifically comprise: have the text editor of grammer expressive ability, based on standard C language and have compiler, assembler, connector, function library manager and the debugger C-SPY of MSP430 characteristic.Can set up, edit, compile, connect and debug project efficiently by corresponding environment setting.The survey sensor program flow diagram is seen Fig. 7.
At first to the crystal oscillator of inside, respectively use pin, SPI communication, house dog and A/D converter etc. partly to carry out initialization, the SPI mouth by single-chip microcomputer is configured the register parameters of X472 chip then.
Because the power consumption of X472 chip is relatively large, being in the receiving mode electric current is 15.6mA, is in the minimum 11.5mA of sending mode electric current, when the electric current under idle condition has also reached 1.8mA.Can not well satisfy the requirement of survey sensor low-power consumption, WOR (electromagnetic wave activation) mode of operation that for this reason adopts chip to provide, under the intervention that does not need MCU, can the cycle wake and detect the arrival whether the active data bag is arranged up from sleep pattern, handle subsequently, when being under the sleep pattern, the total current of sensor only between 0.1mA-0.2mA, thereby solved the excessive problem of power consumption.Single-chip microcomputer is not operated under the low-power consumption mode when having interruption, at this moment, system power dissipation CPU is closed in order to reduce, all clocks all stop, but can wake up by outer interruption, having no progeny in entering at first makes X472 withdraw from the WOR pattern, is operated in idle condition, wait for 30 seconds, if do not receive order, enter the WOR pattern once more, and withdraw from interruption.All transmitting-receiving orders and data acquisition and processes such as data compression and transmission are all finished in interrupt routine.Enter the low-power consumption mode of single-chip microcomputer after all tasks are finished dealing with in the interruption once more.For fear of the interference of other communications facility homogenous frequency signal and finish multiple signals and host computer communicates, must formulate the high-level communications protocol of sensor and host computer, protocol section will two save and be introduced down.
The graphical interfaces display design: way, wakeup time and the transfer address setting of carrying out sensor in the hurdle is being set, and wakeup time for the unit maximal value is 3599, adopts space character to separate with the second when using a plurality of transfers address; After sensor installs, its hardware address is inserted in the address field of list box, measured and finish the maximal value that shows the measurement electric current in the after-current hurdle, just often show the signal intensity that receives and send in communication the status bar, can quote wrong type when makeing mistakes; For the connection status of testing single-sensor can be in the address text box on test hurdle its hardware address of input, the hit testing button will show its communications status in the state text box; Measure the interface and have two graphic presentation frames, first is used for showing the Potential distribution curve of MOA, and second is used for the monitor signal waveform; Their coordinate figure can be provided with by the text box input in the display field of below, can also select whether to want simultaneously the mean value curve of video data; Even coefficient of current unevenness and current average show in result bar; After measurement is finished, can use save button that all measurement data and configuration data are preserved also can use and preserve picture buttons and be stored as picture format.
The course of work of the embodiment of the invention is: survey sensor is placed between the resistor disc of lightning arrester inside, after power-frequency voltage puts on lightning arrester, survey sensor will pass through electric current, the size of this electric current is exactly the size of current that flows through lightning arrester inside, survey sensor is with the wireless transport module of this electric current by inside, signal is sent to relay sensor carries out signal condition, signal after the processing is sent to centralized control unit again, carry out 2 times of signal and handle, be sent to upper PC at last.
Claims (6)
1. built-in lightning arrester electric current radio communication measuring system, be used to measure the curtage that flows through lightning arrester core body, it is mainly by a plurality of survey sensors, relay sensor, central control unit and upper PC are formed, survey sensor is identical with the relay sensor hardware configuration, by the signal collection modulation module, the A/D converting unit, control module, the power source conversion Voltage stabilizing module, wireless transport module is formed, the data that a plurality of survey sensors record are sent to relay sensor by wireless transport module, by relay sensor signal is handled the back again and be sent to central control unit by wireless transport module, central control unit is by wireless transport module, usb bus switching administrative unit, USB interface, voltage transformation module is formed, central control unit is transmitted the measuring command of upper PC to relay sensor, and receive the data that survey sensor returns, be connected by USB interface between central control unit and the upper PC, upper PC is responsible for measuring system is carried out the parameter setting, it is characterized in that, described a plurality of survey sensor is positioned over a plurality of lightning arrester core bodies inside respectively, and connect with the resistor disc of lightning arrester inside, the electric current that survey sensor flows through the inner core body of the lightning arrester that records is sent to relay sensor by wireless transport module and carries out signal condition.
2. built-in lightning arrester electric current radio communication measuring system according to claim 1, it is characterized in that, the signal collection modulation module of described survey sensor and relay sensor is to utilize the small resistor sampling method to carry out signal extraction, selects the direct insertion precision resistance of 250 Ω for use.
3. built-in lightning arrester electric current radio communication measuring system according to claim 1, it is characterized in that, the chip that the control module of described survey sensor and relay sensor and A/D converting unit adopt is the MSP430F chip, and its inside comprises timer, serial line interface, operational amplifier, 10 A/D converters, house dog, fundamental clock, supply voltage monitoring function module.
4. built-in lightning arrester electric current radio communication measuring system according to claim 3, it is characterized in that, the chip that the wireless transport module of described survey sensor and relay sensor adopts is the X472 rf chip, adopts SPI synchronous serial interface communication protocol to communicate between MSP430F chip and the X472 rf chip.
5. built-in lightning arrester electric current radio communication measuring system according to claim 1, it is characterized in that, the power source conversion Voltage stabilizing module of the survey sensor of described survey sensor and relay sensor adopts rated voltage 3.6V, ceiling voltage 4.2V, capacity is the lithium battery power supply of 250mAh, and selects the linear voltage regulator NCP500 of fixing output to do the DC/DC conversion.
6. built-in lightning arrester electric current radio communication measuring system according to claim 1 is characterized in that, the usb bus connect chip that described central control unit adopts is USB2 SPI, and peripheral component is 1 12M crystal and 2 electric capacity.
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| CN2010105609056A CN102095916A (en) | 2010-11-25 | 2010-11-25 | Wireless communication measuring system for current of build-in arrester |
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| CN2010105609056A CN102095916A (en) | 2010-11-25 | 2010-11-25 | Wireless communication measuring system for current of build-in arrester |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103079188A (en) * | 2013-01-09 | 2013-05-01 | 北京屏芯科技有限公司 | Method and system for realizing short distance wireless communication signal automatic roaming |
| CN107831380A (en) * | 2017-10-13 | 2018-03-23 | 国网辽宁省电力有限公司电力科学研究院 | A kind of wireless rapid detection system of arrester Potential distribution and Temperature Distribution and method |
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| CN201344961Y (en) * | 2008-12-16 | 2009-11-11 | 河海大学常州校区 | Remote wireless security monitoring device for distributed lightening arresters |
| CN101848469A (en) * | 2009-03-25 | 2010-09-29 | 张健 | Repeater system and method for wireless sensor network |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103079188A (en) * | 2013-01-09 | 2013-05-01 | 北京屏芯科技有限公司 | Method and system for realizing short distance wireless communication signal automatic roaming |
| CN107831380A (en) * | 2017-10-13 | 2018-03-23 | 国网辽宁省电力有限公司电力科学研究院 | A kind of wireless rapid detection system of arrester Potential distribution and Temperature Distribution and method |
| CN107831380B (en) * | 2017-10-13 | 2023-12-15 | 国网辽宁省电力有限公司电力科学研究院 | Wireless rapid detection system and method for potential distribution and temperature distribution of lightning arrester |
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Application publication date: 20110615 |