CN207181515U - A kind of transformer station's over-voltage monitoring system based on wireless collection technology - Google Patents
A kind of transformer station's over-voltage monitoring system based on wireless collection technology Download PDFInfo
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Abstract
The utility model belongs to technical field of electric automation, more particularly to a kind of transformer station's over-voltage monitoring system based on wireless collection technology.It includes two parts：Test probe part and receive probe segment.The utility model due to provided with A/D convertor circuit cause analog signal amount it is relatively stable become data signal amount, realized by the High Speed Analog collection inside ARM and good record carried out to the detail section of primary signal.The stable sampling of analog sampling circuit is realized, reaches good energy-saving effect, the influence from high voltage electric field Parameters variation can be resisted, there is preferable quiet, dynamic property.The radio detection of test result is realized, avoids the coaxial cable wiring that test site is cumbersome, the person electric shock for preventing to carry out the wired calibration tape of high-tension apparatus progress is potentially possible, and test data is accurate, reliably.The original hardware transform link of overvoltage signal is simplified, improves the flexibility of complete machine, the device can produce extensively as product, considerable benefit.
Description
Technical field
The utility model belongs to technical field of electric automation, more particularly to a kind of transformer station based on wireless collection technology
Over-voltage monitoring system.
Background technology
By to power system research and its O＆M experience, the tolerance of the insulating properties and overvoltage of each link of power network
Key effect is played in the horizontal health operation to power network.Once generation overvoltage, electrical apparatus insulation characteristic is gently then caused to deteriorate, weight
Then cause power grid accident.It is therefore desirable to be monitored and study to Hyper-Voltage of Power Systems, accident is instructed according to test result
Analysis, rational basis are provided for further lifting dielectric level.The method being widely used at present is to overvoltage through bottom shielding of bushing
Tested, connected using applied voltage sensor and capacitive device, partial pressure is carried out to original overvoltage, will be excessively electric after decay
Pressure is tested, and can be very good to reflect original waveform, but fault oscillograph samples signal by coaxial cable excessively,
Coaxial cable needs additional impedance to be matched, and wiring process is cumbersome, once capacitive apparatus imperfect earth, will cause high-voltage signal
Oscillograph is accessed, threatens tester's personal safety.Simultaneously because when being gathered using wired mode, primary voltage waveform it is long away from
From cable on generate decay, result in the distortion of waveform.
Utility model content
The utility model is directed to above-mentioned problems of the prior art, there is provided a kind of change based on wireless collection technology
Power station over-voltage monitoring system.Purpose is to need cumbersome coaxial cable wiring to solve conventional test site, has been prevented pair
The person electric shock that the wired calibration tape of high-tension apparatus progress comes is potentially possible, and overvoltage signal collection phase is carried out in a manner of wireless collection
The HFS of primary signal can preferably be reduced by being gathered for traditional wire mode, while realize good measuring accuracy.
Technical scheme is used by the utility model solves its technical problem：
A kind of transformer station's over-voltage monitoring system based on wireless collection technology, including two parts：Test probe part
With receive probe segment, wherein sensor assembly and sample circuit, boostrap circuit, clamp circuit at the same be connected amplifying circuit according to
Secondary connection, amplifying circuit are connected with signal sending end ARM core boards；Signal hair is integrated with signal sending end ARM core boards
Sending end CPU, signal sending end A/D module, signal sending end SPI modules, signal sending end communication module；Signal sending end ARM cores
Core is connected with memory circuitry, and signal sending end ARM core boards are connected with signal sending end wireless module, and signal is sent
End wireless module is connected with signal sending end antenna；Signal receiving end antenna is connected with signal receiving end wireless module, letter
Number receiving terminal wireless module is connected with signal receiving end ARM core boards, and signal receiving end ARM core boards include signal receiving end
CPU, signal receiving end A/D module, signal receiving end SPI modules, signal receiving end communication module；Signal receiving end ARM core boards
Turn USB circuit with serial ports to be connected, serial ports turns USB circuit and with PC remotely monitors is connected.
The sensor assembly is capacitive probe component, and sample circuit is connected to after system overvoltage is decayed, corresponding
R3 in test probe partial circuit, R3 one end connect boostrap circuit, corresponding test probe partial circuit 1.2V reference source circuits
In R1, other end connection clamp circuit, the R2 in corresponding test probe partial circuit；Wherein DW1, DW2 are relative to connect, one end
Be connected with R2 output end, the other end with output be connected；R1 one end is connected with system power supply, another list and a reference source
Chip REF1 output is connected；A reference source REF1 other end ground connection；R2 output is connected with R5 output, connects simultaneously
The anti-phase ratio input of amplifying circuit, i.e. discharge circuit；U1 in-phase proportion input is connected with R6, R6 another termination
Ground；R9 both ends be connected respectively to U1A anti-phase ratio input pin IN- and output pin OUT, U1A with compared with
Example input pin IN+ is grounded by R6；Output end is connected to signal sending end ARM core boards, i.e. transmitting terminal microcontroller；Signal
Signal sending end CPU7, signal sending end A/D module, signal sending end SPI modules, signal are integrated with transmitting terminal ARM core boards
Transmitting terminal communication module；Analog signal after conversion is connected to signal sending end CPU pin PA0；Signal sending end ARM cores
Core and memory circuitry, i.e. FeRAM memory chip are connected；Wherein CPU pin PB8 is connected with ferroelectricity storage core pin CS
Connect；CPU pin PB9 is connected with ferroelectricity storage core pin SO；CPU pin PB13 is connected with ferroelectricity storage core pin SI
Connect；CPU pin PB14 is connected with ferroelectricity storage core pin SCK；CPU pin PB15 and ferroelectricity storage core pin HOLD phases
Connection；Signal sending end ARM core boards and signal sending end wireless module, i.e. transmitting terminal wifi circuits are connected；Wherein CPU's
Pin PA9 is connected with transmitting terminal wireless module RXD pins；CPU pin PA10 is connected with transmitting terminal wireless module TXD pins
Connect；Signal sending end wireless module is connected with signal sending end antenna.
The signal receiving end antenna is that receiving terminal wifi circuits are connected with signal receiving end wireless module, and signal receives
End wireless module is that receiving terminal microcontroller is connected with signal receiving end ARM core boards, the wherein TXD of receiving terminal wifi circuits
Pin is connected with the PA10 pins of receiving terminal microcontroller, RXD pins and the receiving terminal microcontroller of receiving terminal wifi circuits
PA9 pins be connected；Signal receiving end ARM core boards are that receiving terminal microcontroller includes signal receiving end CPU, and signal receives
Hold A/D module, signal receiving end SPI modules, signal receiving end communication module；Signal receiving end ARM core boards turn USB with serial ports
Circuit is connected, and the RXD pins that pin PA2 and the USB of receiving terminal microcontroller turn serial port circuit are connected, receiving terminal microcontroller
The TXD pins that pin PA3 and the USB of device turn serial port circuit are connected, USB turn the pin XI, XO of serial port circuit respectively with crystal
Oscillator CY1 is connected, and connects two electric capacity C1, C4 ground connection；USB turns the pin UD- of serial port circuit, and UD+ is connected to USB and connect
Mouth is simultaneously connected with computer.
The test probe part：Using signal sending end ARM core boards as control core, signal sending end ARM core boards
By signal sending end CPU7, signal sending end A/D module, signal sending end SPI modules, signal sending end communication module, signal hair
Sending end wireless module, signal sending end antenna composition；Test probe is based partially on wireless wifi network construction forms and forms fieldbus
Structure.
It is described to receive probe segment：The 2.4G frequency ranges that signal receiving end antenna is sent to test probe signal sending end antenna
Wireless signal received, and be connected to signal receiving end ARM core boards, and enter line asynchronous through signal receiving end communication module
The decoding of signal of communication, test is obtained to the original waveform of overvoltage signal, and the waveform is turned into USB circuit conversion by serial ports
It is connected for the usb signal of standard with PC remotely monitors.
The PC remotely monitors refer to computer.
The advantages of the utility model and beneficial effect are：
1st, A/D convertor circuit cause analog signal amount it is relatively stable become data signal amount, pass through the high speed inside ARM
Analog acquisition realizes has carried out good record to the detail section of primary signal.
2nd, introducing high precision reference source and PID control preferably realizes the stable sampling of analog sampling circuit.Although system
It is battery powered, voltage changes with the power consumption of system constantly, but the voltage waveform moment that sampling obtains is stable in actual value.
3rd, detected using voltage triggered principle, system enters sleep pattern during system non-output voltage signal, reaches
Good energy-saving effect.
4th, control system has preferable antijamming capability, can preferably resist the shadow from high voltage electric field Parameters variation
Ring, there is preferable quiet, dynamic property.
5th, the radio detection of test result is realized, the cumbersome coaxial cable wiring of test site is avoided, has prevented pair
The person electric shock that the wired calibration tape of high-tension apparatus progress comes is potentially possible, and test data is accurate, reliably.
6th, most functions are realized using software programming, simplify the original hardware transform link of overvoltage signal,
Improve the flexibility of complete machine.
7th, system is based on high speed ARM microprocessor, and portable one chip microcomputer samples, wireless internet of things technology, greatly
The means such as data analysis, the Typical over-voltage waveform sample tested according to transformer station, it is follow-up transmission line of electricity lightning protection, transformer station
Overvoltage protection, the planning of science activities of power system and design provide analysis foundation.
8th, the device can produce extensively as product, considerable benefit.
Brief description of the drawings
With reference to specific embodiment of the utility model and accompanying drawing, the utility model is described in further detail,
Embodiment described in the utility model is only the utility model part of the embodiment, rather than whole embodiments.Base
Embodiment in the utility model, the institute that those of ordinary skill in the art are obtained under the premise of creative work is not made
There is other embodiment, belong to the scope of the utility model protection.
Fig. 1 is test probe part-structure schematic diagram in Tthe utility model system；
Fig. 2 is to receive probe segment structural representation in Tthe utility model system；
Fig. 3 is the utility model test probe part circuit structure principle schematic；
Fig. 4 is that the utility model receives probe segment circuit structure principle schematic；
Fig. 5 is the monitor curve figure that Tthe utility model system detects overvoltage signal；
Fig. 6 is Tthe utility model system workflow diagram.
In figure：Sensor assembly 1, sample circuit 2, boostrap circuit 3, clamp circuit 4, amplifying circuit 5, signal sending end
ARM core boards 6, signal sending end CPU7, signal sending end A/D module 8, signal sending end SPI modules 9, signal sending end communication
Module 10, signal sending end wireless module 11, signal sending end antenna 12, signal receiving end ARM core boards 13, signal receiving end
CPU14, signal receiving end A/D module 15, signal receiving end SPI modules 16, signal receiving end communication module 17, signal receiving end
Wireless module 18, signal receiving end antenna 19, power supply circuit 20, memory circuitry 21, serial ports turn USB circuit 22, and PC is remotely supervised
Depending on 23, sampling resistor 24, bi-directional voltage stabilizing circuit 25,1.2V reference source circuits 26, discharge circuit 27, transmitting terminal wifi circuits 28,
Transmitting terminal microcontroller 29, FeRAM memory chip 30, transmitting terminal mu balanced circuit 31, USB interface 32, USB turn serial port circuit 33, connect
Receiving end wifi circuits 34, receiving terminal microcontroller 35, receiving terminal mu balanced circuit 36.
Embodiment
The utility model is a kind of transformer station's over-voltage monitoring system based on wireless collection technology, and the utility model is based on
Wireless collection technology, overvoltage are the important indicators evaluated line insulation, determine the safety and stability fortune of electrical equipment
OK.The key factor that research is selection electrical insulation strength, but the equal base of traditional detection means are carried out to the overvoltage of power system
Waveform acquisition is carried out in wired mode.The utility model is based on high speed ARM microprocessor, and portable one chip microcomputer is adopted
The means such as sample, wireless internet of things technology, big data analysis, it successfully have developed the over-voltage monitoring analysis based on wireless collection technology
System.The cumbersome coaxial cable wiring of test site is avoided, has prevented the person that high-tension apparatus is carried out wired calibration tape and come
Get an electric shock potentially possible, test data is accurate, reliably.The Typical over-voltage waveform sample tested according to transformer station, it is follow-up defeated
Electric line lightning protection, transformer station's overvoltage protection, the planning of science activities of power system and design provide analysis foundation.
The key factor that research is selection electrical insulation strength, but traditional detection hand are carried out for the overvoltage of power system
Section is based on wired mode and carries out waveform acquisition.And the utility model is to be based on wireless collection technology, overvoltage is exhausted to power network
The important indicator that edge is evaluated, determine the safe and stable operation of electrical equipment.
As depicted in figs. 1 and 2, Fig. 1 is that test probe part is tied in Tthe utility model system to Tthe utility model system structure
Structure schematic diagram, Fig. 2 are to receive probe segment structural representation in Tthe utility model system.Tthe utility model system includes two portions
Point：Test probe part and receive probe segment.
Sensor assembly 1 is capacitive probe component in Tthe utility model system, is connected to after system overvoltage is decayed
Sample circuit 2, correspond to the R3 in test probe partial circuit, R3 one end connection boostrap circuit 3, corresponding test probe partial circuit
R1 in 1.2V reference source circuits 26, other end connection clamp circuit 4, corresponds to the R2 in test probe partial circuit 25.Wherein
DW1, DW2 are relative to connect, and one end is connected with R2 output end, and the other end is connected with the output of 1.2V reference source circuits 26.
R1 one end is connected with system power supply, and another list is connected with benchmark source chip REF1 output.The a reference source REF1 other end
Ground connection.R2 output is connected with R5 output, while connects amplifying circuit 5, i.e. the anti-phase ratio input of discharge circuit 27.
U1 in-phase proportion input is connected with R6, R6 other end ground connection.The anti-phase ratio that R9 both ends are connected respectively to U1A is defeated
Enter to hold pin IN- and output pin OUT, U1A in-phase proportion input pin IN+ to be grounded by R6.Output terminates to
Signal sending end ARM core boards 6, i.e. transmitting terminal microcontroller 29.Signal transmission is integrated with signal sending end ARM core boards 6
Hold CPU7, signal sending end A/D module 8, signal sending end SPI modules 9, signal sending end communication module 10.By the mould after conversion
Intend signal and be connected to signal sending end CPU7 pin PA0, and handled inside CPU7.Signal sending end ARM core boards 6
With memory circuitry 21, i.e. FeRAM memory chip 30 is connected.Wherein CPU pin PB8 is connected with ferroelectricity storage core pin CS
Connect；CPU pin PB9 is connected with ferroelectricity storage core pin SO；CPU pin PB13 is connected with ferroelectricity storage core pin SI
Connect；CPU pin PB14 is connected with ferroelectricity storage core pin SCK；CPU pin PB15 and ferroelectricity storage core pin HOLD
It is connected；Signal sending end ARM core boards 6 and signal sending end wireless module 11, i.e. transmitting terminal wifi circuits 28 are connected.Its
Middle CPU pin PA9 is connected with transmitting terminal wireless module RXD pins；CPU pin PA10 and transmitting terminal wireless module TXD
Pin is connected.Signal sending end wireless module 11 is connected with signal sending end antenna 12.
Signal receiving end antenna 19 is that receiving terminal wifi circuits 34 are connected with signal receiving end wireless module 18, and signal connects
Receiving end wireless module 18 is that receiving terminal microcontroller 35 is connected with signal receiving end ARM core boards 13, wherein receiving terminal wifi
The TXD pins of circuit 34 are connected with the PA10 pins of receiving terminal microcontroller 35, the RXD pins of receiving terminal wifi circuits 34 with
The PA9 pins of receiving terminal microcontroller 35 are connected.Signal receiving end ARM core boards 13 are that receiving terminal microcontroller 35 includes letter
Number receiving terminal CPU14, signal receiving end A/D module 15, signal receiving end SPI modules 16, signal receiving end communication module 17.Letter
Number receiving terminal ARM core boards 13 turn USB circuit 22 with serial ports and are connected, and the pin PA2 and USB of receiving terminal microcontroller 35 turn string
The RXD pins of mouth circuit 33 are connected, and the pin PA3 and USB of receiving terminal microcontroller 35 turns the TXD pin phases of serial port circuit 33
Connection, the pin XI, XO that USB turns serial port circuit 33 are connected with crystal oscillator CY1 respectively, and connect two electric capacity C1, C4
Ground connection.The pin UD-, UD+ that USB turns serial port circuit 33 are connected to USB interface 32 and are connected with computer.And according to receiving
Gathered data communicated with PC remotely monitors 23.
（1）Test probe part：It is control core with signal sending end ARM core boards 6, signal sending end ARM core boards 6
By signal sending end CPU7, signal sending end A/D module 8, signal sending end SPI modules 9, signal sending end communication module 10, letter
Number transmitting terminal wireless module 11, signal sending end antenna 12 form.Test probe is based partially on wireless wifi network construction forms and formed
Field-bus structure.Sampling resistor 2 sends the analog signal collected to boostrap circuit 3.Boostrap circuit serves benchmark electricity
The effect of translational shifting, the zero reference electrical level transfer of complete machine is fixed into positive reference level to reach ac signal acquisition as defined in
Purpose.The input voltage of simultaneity factor passes through clamp circuit 4, the effect of short circuit input signal is played, to protect subsequent conditioning circuit not
Can be because being damaged more than rated voltage.Signal connection is input to operational amplifier 5 afterwards, input signal is put
Greatly so that input signal is amplified to rational range value.Then computing, processing, storage are carried out to the data of input；Further according to adopting
The size of the overvoltage signal collected, asynchronous communication is exported by the end of transmitting terminal communication module 10 of signal sending end ARM core boards 6
Signal, control signal transmitting terminal wireless module 11 send the wireless signal of 2.4G frequency ranges, and are sent through signal sending end antenna 12.
（2）Receive probe segment：The 2.4G that signal receiving end antenna 19 is sent to test probe signal sending end antenna 12
The wireless signal of frequency range is received, and is connected to signal receiving end ARM core boards 13, and through signal receiving end communication module 17
The decoding of asynchronous communication signal is carried out, obtains test to the original waveform of overvoltage signal, and the waveform is turned into USB by serial ports
The usb signal that circuit 22 is converted to standard is connected with PC remotely monitors 23, and PC remotely monitors 23 it is shown above go out collection
The Raw waveform signals arrived, remote monitoring is realized to facilitate.
The PC remotely monitors 23 refer to the computer that artificially can directly send manipulation order.Real-time display is each on screen
Kind collection signal intensity and result of calculation, can also store historical data.For increase data storage depth, ARM core boards general
The data stored are turned USB circuit 22 by serial ports and sent out by current overvoltage data storage into memory circuitry 21
The program being sent in host computer is calculated and handled, and the curve of drafting pattern can intuitively react the screen in host computer
On.
The PC remotely monitors 23 have two functions, and one is establishment, transmission program, and the program finished is passed to
The signal sending end ARM core boards 6 of test probe；Another is operation in-service monitoring, i.e., carries out system using LCD display pictures
Operating condition show, accident alarming list display, history parameters query display etc..
As shown in Figure 3 and Figure 4, Fig. 3 is the utility model test probe part circuit structure to the utility model circuit theory
Principle schematic, Fig. 4 are that the utility model receives probe segment circuit structure principle schematic.The utility model is the system of being directed to
The collection of overvoltage signal when overvoltage occurs, and the technical method based on high speed microprocessor ARM collection signals is devised,
Wirelessly carrying out the transmission of signal realizes the accurate measurement of over-voltage monitoring.
The utility model test probe part circuit structure be by：Sampling resistor 24；Bi-directional voltage stabilizing circuit 25；1.2V benchmark
Source circuit 26, discharge circuit 27, wifi circuits 28, transmitting terminal microcontroller 29, FeRAM memory chip 30, transmitting terminal mu balanced circuit
31 compositions.
The utility model probe receiver part circuit structure be by：USB interface 32；USB turns serial port circuit 33；Receive
Hold wifi circuits 34；Transmitting terminal microcontroller 35；Receiving terminal mu balanced circuit 36 forms.
According to wireless collection transformer station over-voltage monitoring method, the specific implementation process of whole system and long-range by PC
The operating procedure that control is implemented in monitoring 23 is as follows：
A. first, three-phase alternating current is sampled by sampling resistor 24.
B. bi-directional voltage stabilizing circuit 25 is made up of two voltage-stabiliser tube Opposite direction connections, can be to any the half of the AC signal of input
Week plays a part of amplitude limit, and in the case where positive half cycle input signal is too high, then voltage-regulator diode DW1 equivalent resistance is significantly
Degree reduces, and in the case where negative half period input signal is too high, then voltage-regulator diode DW2 equivalent resistance significantly reduces, and rises
To the effect of short circuit input signal, then the electric current increase of R2 resistance is now flowed through, by the voltage energy of the too high amplitude of input point
Load is on R2, to protect subsequent conditioning circuit not damaged because of more than rated voltage.
C. 1.2V reference source circuits 26 are made up of R1 and 1.2V a reference sources LM385-1V2, wherein, R1 one end and system electricity
Source is connected, and the other end is connected with benchmark source chip so that gathers the zero reference electrical level transfer of signal to the 1.2V bases of stabilization
Quasi- level, to reach the purpose of ac signal acquisition.
D. discharge circuit 27 is constituted anti-phase scaling circuit, input signal is put by OPAMP, R5, R6, R9
Greatly so that input signal is amplified to rational range value, and the circuit is R9/R5 to the multiplication factor of input signal, and wherein R6 is
Balance resistance, play a part of balancing input impedance.
E. transmitting terminal microcontroller 29 and receiving terminal microcontroller 35 are ARM chip STM32, and it is reasonable to be carried out by C language
Change programming, realize and real-time circulation chain collection is carried out with FIFO first-in first-outs to the voltage signal of input, deposited using ferroelectricity
Chip 30 is stored up, has both increased considerably storage depth, while meets high speed signal storage, when overvoltage occurs for system, is
System sends alarm signal, while overvoltage signal waveform is sent into transmitting terminal wifi circuits 28.
F. power supplies of the PW chips 662k of transmitting terminal mu balanced circuit 31 and receiving end mu balanced circuit 36 to system carries out voltage stabilizing, its
Middle C3 plays the effect to system voltage filtering, and the stability of system work is greatly improved.
G. the wireless signal sent by the receiving end/sending end wifi circuits 28 of receiving terminal wifi circuits 34, and signal is connected
Receiving terminal microcontroller 35 is connected to, implementation difference, and the test result that will correspond to probe are carried out according to the address of different equipment
After PC software processing, it is shown on LCD.
The monitor curve figure of overvoltage signal is detected as shown in figure 5, Fig. 5 is Tthe utility model system.As shown in fig. 6,
Fig. 6 is Tthe utility model system workflow diagram.
A kind of transformer station's over-voltage monitoring system work process based on wireless collection technology of the utility model is as follows：
Starting working condition is that transformer switch does not close a floodgate, and now ARM is powered, and detects the AD values of simulation input pin,
And according to the AD average values of continuous acquisition 64 times as this reference voltage AD0, continuous detection AD pin input voltages afterwards
Situation, once magnitude of voltage exceed initialization start threshold voltage U0, that is, start continuously by the sampled value of 12 precision preserve to
Internal RAM.After internal RAM is write completely, wirelessly Wave data by this test is sent to main frame, and this is surveyed
Test result writes FRAM.Because actual test needs to detect A, B, C three-phase for moment of closing a floodgate simultaneously, in order to avoid data
Conflict is sent, therefore after A, B, C data buffering area write full, timesharing sends the data to main frame, in order to which main frame is carried out at data
Reason and waveform are shown.
Wherein test probe part：The overvoltage signal waveform occurred in power system is wirelessly monitored with
Send.Overvoltage signal is subjected to data acquisition, data storage, data query, data show, the function such as acquisition mode setting.
Wave data after conversion is delivered to the CPU of ARM core boards analog input signal end；Then the data of input are transported
Calculate, handle, storage；Further according to the size of the overvoltage signal collected, sent by the signal of signal sending end ARM core boards 6
The end of communication module 10 output asynchronous communication signal is held, control signal transmitting terminal wireless module 11 sends the wireless communication of 2.4G frequency ranges
Number, and sent through signal sending end antenna 12.
Wherein receive probe segment：The 2.4G that signal receiving end antenna 19 is sent to test probe signal sending end antenna 12
The wireless signal of frequency range is received, and is connected to signal receiving end ARM core boards 13, and through signal receiving end communication module 17
The decoding of asynchronous communication signal is carried out, obtains test to the original waveform of overvoltage signal, and the waveform is turned into USB by serial ports
The usb signal that circuit 22 is converted to standard is connected with PC remotely monitors 23, and PC remotely monitors 23 it is shown above go out collection
The Raw waveform signals arrived.
Claims (6)
1. a kind of transformer station's over-voltage monitoring system based on wireless collection technology, it is characterized in that：Including two parts：Test is visited
Head point and receive probe segment, wherein sensor assembly and sample circuit, boostrap circuit, clamp circuit while be connected amplification
Circuit is sequentially connected, and amplifying circuit is connected with signal sending end ARM core boards；It is integrated with signal sending end ARM core boards
Signal sending end CPU, signal sending end A/D module, signal sending end SPI modules, signal sending end communication module；Signal is sent
End ARM core boards are connected with memory circuitry, and signal sending end ARM core boards are connected with signal sending end wireless module,
Signal sending end wireless module is connected with signal sending end antenna；
Signal receiving end antenna is connected with signal receiving end wireless module, signal receiving end wireless module and signal receiving end
ARM core boards are connected, and signal receiving end ARM core boards include signal receiving end CPU, signal receiving end A/D module, signal and connect
Receiving end SPI modules, signal receiving end communication module；Signal receiving end ARM core boards turn USB circuit with serial ports and are connected, serial ports
Turn USB circuit with PC remotely monitors to be connected.
2. a kind of transformer station's over-voltage monitoring system based on wireless collection technology according to claim 1, it is characterized in that：
The sensor assembly is capacitive probe component, and sample circuit, corresponding test probe are connected to after system overvoltage is decayed
R3 in partial circuit, R3 one end connect boostrap circuit, correspond to the R1 in test probe partial circuit 1.2V reference source circuits, separately
One end connects clamp circuit, corresponds to the R2 in test probe partial circuit；The relative series connection of wherein DW1, DW2, one end and R2's is defeated
Go out end to be connected, the other end with output be connected；R1 one end is connected with system power supply, another list and benchmark source chip REF1
Output be connected；A reference source REF1 other end ground connection；R2 output is connected with R5 output, while connects amplification electricity
The anti-phase ratio input on road, i.e. discharge circuit；U1 in-phase proportion input is connected with R6, R6 other end ground connection；R9
Both ends be connected respectively to U1A anti-phase ratio input pin IN- and output pin OUT, U1A in-phase proportion it is defeated
Enter to hold pin IN+ to be grounded by R6；Output end is connected to signal sending end ARM core boards, i.e. transmitting terminal microcontroller；Signal is sent
Signal sending end CPU7, signal sending end A/D module, signal sending end SPI modules, signal transmission are integrated with the ARM core boards of end
Hold communication module；Analog signal after conversion is connected to signal sending end CPU pin PA0；Signal sending end ARM core boards
With memory circuitry, i.e. FeRAM memory chip is connected；Wherein CPU pin PB8 is connected with ferroelectricity storage core pin CS；
CPU pin PB9 is connected with ferroelectricity storage core pin SO；CPU pin PB13 is connected with ferroelectricity storage core pin SI；
CPU pin PB14 is connected with ferroelectricity storage core pin SCK；CPU pin PB15 is connected with ferroelectricity storage core pin HOLD
Connect；Signal sending end ARM core boards and signal sending end wireless module, i.e. transmitting terminal wifi circuits are connected；Wherein CPU's draws
Pin PA9 is connected with transmitting terminal wireless module RXD pins；CPU pin PA10 is connected with transmitting terminal wireless module TXD pins
Connect；Signal sending end wireless module is connected with signal sending end antenna.
3. a kind of transformer station's over-voltage monitoring system based on wireless collection technology according to claim 1, it is characterized in that：
The signal receiving end antenna is that receiving terminal wifi circuits are connected with signal receiving end wireless module, signal receiving end is wireless mould
Block is that receiving terminal microcontroller is connected with signal receiving end ARM core boards, and wherein the TXD pins of receiving terminal wifi circuits are with connecing
The PA10 pins of receiving end microcontroller are connected, the RXD pins of receiving terminal wifi circuits and the PA9 pins of receiving terminal microcontroller
It is connected；Signal receiving end ARM core boards are that receiving terminal microcontroller includes signal receiving end CPU, signal receiving end A/D module,
Signal receiving end SPI modules, signal receiving end communication module；Signal receiving end ARM core boards turn USB circuit with serial ports and are connected
Connect, the RXD pins that pin PA2 and the USB of receiving terminal microcontroller turn serial port circuit are connected, the pin of receiving terminal microcontroller
The TXD pins that PA3 turns serial port circuit with USB are connected, USB turn the pin XI, XO of serial port circuit respectively with crystal oscillator CY1
It is connected, and connects two electric capacity C1, C4 ground connection；USB turns the pin UD- of serial port circuit, UD+ be connected to USB interface and with meter
Calculation machine is connected.
4. a kind of transformer station's over-voltage monitoring system based on wireless collection technology according to claim 1, it is characterized in that：
The test probe part：Using signal sending end ARM core boards as control core, signal sending end ARM core boards are sent out by signal
Sending end CPU7, signal sending end A/D module, signal sending end SPI modules, signal sending end communication module, signal sending end is wireless
Module, signal sending end antenna composition；Test probe is based partially on wireless wifi network construction forms and forms field-bus structure.
5. a kind of transformer station's over-voltage monitoring system based on wireless collection technology according to claim 1, it is characterized in that：
It is described to receive probe segment：The wireless communication for the 2.4G frequency ranges that signal receiving end antenna is sent to test probe signal sending end antenna
Number received, and be connected to signal receiving end ARM core boards, and asynchronous communication signal is carried out through signal receiving end communication module
Decoding, obtain test to the original waveform of overvoltage signal, and the waveform turned into USB circuit by serial ports and is converted to standard
Usb signal is connected with PC remotely monitors.
6. a kind of transformer station's over-voltage monitoring system based on wireless collection technology according to claim 1, it is characterized in that：
The PC remotely monitors refer to computer.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107328989A (en) * | 2017-08-23 | 2017-11-07 | 国网辽宁省电力有限公司电力科学研究院 | A kind of transformer station's over-voltage monitoring system and method based on wireless collection technology |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107328989A (en) * | 2017-08-23 | 2017-11-07 | 国网辽宁省电力有限公司电力科学研究院 | A kind of transformer station's over-voltage monitoring system and method based on wireless collection technology |
| CN107328989B (en) * | 2017-08-23 | 2024-02-09 | 国网辽宁省电力有限公司电力科学研究院 | Transformer substation overvoltage monitoring system and method based on wireless acquisition technology |
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