CN107402331A - Low pressure is wireless phase checking device and its method - Google Patents
Low pressure is wireless phase checking device and its method Download PDFInfo
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- CN107402331A CN107402331A CN201710805694.XA CN201710805694A CN107402331A CN 107402331 A CN107402331 A CN 107402331A CN 201710805694 A CN201710805694 A CN 201710805694A CN 107402331 A CN107402331 A CN 107402331A
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000012545 processing Methods 0.000 claims abstract description 25
- 238000012937 correction Methods 0.000 claims abstract description 19
- 238000005070 sampling Methods 0.000 claims abstract description 16
- 230000003993 interaction Effects 0.000 claims abstract description 13
- 238000012795 verification Methods 0.000 claims abstract description 11
- 230000005540 biological transmission Effects 0.000 claims abstract description 10
- 238000001514 detection method Methods 0.000 claims description 14
- 230000002441 reversible effect Effects 0.000 claims description 12
- 238000013508 migration Methods 0.000 claims description 10
- 230000005012 migration Effects 0.000 claims description 10
- 238000005259 measurement Methods 0.000 claims description 6
- 230000001360 synchronised effect Effects 0.000 claims description 5
- 238000012935 Averaging Methods 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/18—Indicating phase sequence; Indicating synchronism
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
Abstract
The invention discloses a kind of wireless phase checking device of low pressure, including main frame and slave, data interaction is carried out by wireless signal between the main frame and slave；The main frame is identical with the structure of slave, include signal gathering unit, zero passage sampling unit, data processing unit, the man-machine interaction unit being connected with each other with data processing unit, data transmission unit, phase verification unit, signal gathering unit, zero passage sampling unit, phase verification unit are sequentially connected, remote point-to-point transmission nuclear phase operation is realized by way of wireless telecommunications, save human cost, the working time is shortened, improves operating efficiency.The invention also discloses a kind of wireless nuclear-phase method of low pressure, while main frame monitors zero cross signal with slave and mutually sends time synchronizing signal respectively, main frame also carries out error correction counting, and then improve nuclear phase precision, most phase data is shown in main frame with slave, facilitating staff's observation and operation at last.
Description
Technical field
The present invention relates to a kind of electric power phase checking device and nuclear-phase method, is used for intelligent transformer substation voltage more particularly to one kind
The wireless phase checking device of low pressure and nuclear-phase method of secondary nuclear phase.
Background technology
Put into operation in the early stage of newly-built transformer station with the operation such as the regular maintenance of transformer station, maintenance, renewal of the equipment, often need
The phase at circuit both ends is checked.The instrument being commonly used at present is phase voltammetric meter, and phase voltammetric meter is all
Detection signal enters same equipment, when two test points apart from it is distant when need to use cable to be signally attached to phase
Volt ampere meter, it is often necessary to work in advance, prepare the cable of appropriate length, it is inadequate not so to occur temporary cable, and operation pole is not
It is convenient, the working time is wasted, substantially reduces operating efficiency, it is difficult to ensure substation equipment, the normal operation of system.
Therefore need badly and provide a kind of new low pressure phase checking device and nuclear-phase method to solve the above problems.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of wireless phase checking device of low pressure and its method, easy to operate,
Operating efficiency is high.
In order to solve the above technical problems, one aspect of the present invention is：There is provided a kind of low pressure wireless nuclear phase dress
Put, including main frame and slave, data interaction is carried out by wireless signal between the main frame and slave；
The main frame is identical with the structure of slave, including signal gathering unit, zero passage sampling unit, data processing list
Member, the man-machine interaction unit being connected with each other with data processing unit, data transmission unit, phase verification unit, signal acquisition list
Member, zero passage sampling unit, phase verification unit are sequentially connected；
The zero passage sampling unit include zero cross detection circuit, level shifting circuit, the zero cross detection circuit include according to
First order amplifying circuit, second level amplifying circuit, the Zero-cross comparator circuit of secondary series connection, the input connection of first order amplifying circuit
There are pressure limited protection circuit, power end to be connected with zero migration calibration circuit.
In a preferred embodiment of the present invention, in the zero cross detection circuit,
The first order amplifying circuit includes voltage comparator U1, resistance R1, R2, and resistance R1 one end connection U1's is reverse
Input, other end ground connection, resistance R2 one end connection U1 reverse input end, other end connection U1 output end；
The second level amplifying circuit includes voltage comparator U2, resistance R3, R4, and resistance R3 one end connection U2's is reverse
Input, other end ground connection, resistance R4 one end connection U2 reverse input end, other end connection U2 output end；
The Zero-cross comparator circuit includes zero-crossing comparator U3, resistance R5, and resistance R5 is connected in parallel on U3 power end and output
Between end；
One end connection signal input part of the pressure limited protection circuit, other end ground connection, using two diodes in parallel, its
In the positive pole of a diode be connected with the negative pole of another diode；
The zero migration calibration circuit is using zero migration calibration potentiometer Rv1.
In a preferred embodiment of the present invention, the signal gathering unit uses voltage transformer or/and Current Mutual Inductance
Device continuous sampling signal, the signal of collection include voltage signal, current signal, the voltage class ranges of voltage signal for 10V-
500V, the measurement range of current signal is 10mA -10A.
In a preferred embodiment of the present invention, the data processing unit uses ARM single-chip microcomputers, small volume, and function is more.
In order to solve the above technical problems, another technical solution used in the present invention is：There is provided a kind of based on described wireless
The wireless nuclear-phase method of phase checking device, comprises the following steps：Error correction is provided with the data processing unit of the main frame to determine
When device, be provided with zero-crossing timing timer in the data processing unit of the slave,
(1) host supervision sends very first time synchronizing signal to after zero cross signal to slave, and starts error correction
Timer；Now the slave synchronous averaging zero-crossing timing timer and zero passage monitoring, and return the second time synchronized to main frame
Signal；
(2) the second time synchronizing signal that the main frame returns according to slave, error correction timer count is stopped, and will
The error correction time data of gained is sent to slave；Now slave monitors to stop zero-crossing timing timer during zero cross signal；
(3) slave calculates phase difference value by zero-crossing timing data and error correction time data and shown, and
The phase data is sent to main frame；
(4) main frame receives the phase data, and is shown on man-machine interaction unit.
In a preferred embodiment of the present invention, the calculation formula of the phase difference value is as follows：
D=(t1-t2)/T*360 °
Wherein, d is phase difference, and t1 is zero-crossing timing, and t2 is the error correction time, and T is the zero cross signal cycle.
The beneficial effects of the invention are as follows：
(1) present invention being used cooperatively by main frame and slave, realizes at remote 2 points by the way of wireless telecommunications
Between nuclear phase operation, nuclear phase experiment neatly can be carried out to Circuit Fault on Secondary Transformer low pressure, it is existing in work to eliminate staff
The workload of field arranging signal cable, not only make it that operating process is simple, nuclear phase result is accurate, and saves human cost,
The working time is shortened, improves operating efficiency；
(2) the wireless nuclear-phase method can carry out the measurement of phase difference to the circuit of identical electric voltage frequency, and method is simple, core
The phase degree of accuracy is high, intuitively shows the phase difference at circuit both ends by the man-machine interaction unit of main frame, greatly facilitates work people
Observation and operation of the member to nuclear phase result, it is practical.
Brief description of the drawings
Fig. 1 is the structured flowchart of the wireless preferred embodiment of phase checking device one of low pressure of the present invention；
Fig. 2 is the circuit diagram of the zero cross detection circuit；
Fig. 3 is the nuclear-phase method flow chart of the wireless phase checking device of the low pressure.
Embodiment
Presently preferred embodiments of the present invention is described in detail below in conjunction with the accompanying drawings, so that advantages and features of the invention energy
It is easier to be readily appreciated by one skilled in the art, apparent is clearly defined so as to be made to protection scope of the present invention.
Referring to Fig. 1, the embodiment of the present invention includes：
A kind of wireless phase checking device of low pressure, including main frame and slave, pass through wireless telecommunications between the main frame and slave
Mode carries out the interactive operation of the data such as the phase of point-to-point transmission, voltage, electric current, frequency.
The main frame is identical with the structure of slave, including signal gathering unit, zero passage sampling unit, data processing list
Member, the man-machine interaction unit being connected with each other with data processing unit, data transmission unit, phase verification unit, signal acquisition list
Member, zero passage sampling unit, phase verification unit are sequentially connected.The signal gathering unit uses voltage transformer or/and electric current
Transformer continuous sampling signal, the signal of collection include voltage signal, current signal, and the voltage class ranges of voltage signal are
10V -500V, the measurement range of current signal is 10mA -10A.The data processing unit uses ARM single-chip microcomputers, small volume,
Function is more.
Voltage x current amplitude signal outside the signal gathering unit continuous sampling, is converted to digital data transmission to mistake
Zero sampling unit, the zero passage sampling unit include zero cross detection circuit, level shifting circuit, and the zero cross detection circuit is to mistake
Zero-signal is amplified, and level shifting circuit carries out level conversion processing, and sine wave signal is converted into meet that phase verification is single
The square-wave signal of the Transistor-Transistor Logic level of first signal input interface requirement.The phase verification unit will obtain from zero passage sampling unit
The machine zero cross signal and data processing unit from data transmission unit obtain to machine zero cross signal carry out time difference calculating, will
Result of calculation is transferred to data processing unit, and data processing unit passes time difference data conversion into phase data by data
Defeated unit to machine with carrying out data interaction.In addition, phase verification unit is built-in with phase alignment mechanism, for correcting zero passage data
Caused error in transmittance process, to ensure the accurate of phase data.The data transmission unit can receive the zero passage to machine
Data-signal and voltage x current quantized signal, pass to data processing unit, and can be by the machine mistake that data processing unit provides
Zero data signal and voltage x current quantized signal are transmitted to machine.The man-machine interaction unit can receive the behaviour of operating personnel's input
Instruct and the display of data, operational order is sent to data processing unit, data processing unit performs operational order, entered
The handover operation of row voltage, current measurement passage.
With reference to Fig. 2, the zero cross detection circuit include be sequentially connected in series first order amplifying circuit, second level amplifying circuit,
Zero-cross comparator circuit, the input of first order amplifying circuit is connected with pressure limited protection circuit, power end is connected with zero migration school
Quasi- circuit.The first order amplifying circuit includes voltage comparator U1, resistance R1, R2, and resistance R1 one end connection U1's is reverse
Input, other end ground connection, resistance R2 one end connection U1 reverse input end, other end connection U1 output end；Described
Second amplifying circuit includes voltage comparator U2, resistance R3, R4, resistance R3 one end connection U2 reverse input end, the other end
Ground connection, resistance R4 one end connection U2 reverse input end, other end connection U2 output end；The Zero-cross comparator circuit includes
Zero-crossing comparator U3, resistance R5, resistance R5 are connected in parallel between U3 power end and output end；One end of the pressure limited protection circuit
Connect signal input part, other end ground connection, using two diodes in parallel, the positive pole of one of diode and another two pole
The negative pole connection of pipe；Preferably, double diode D1 can be used, D1 uses paster switching diode BAV199, or uses two
The mode of discrete diode positive-negative connected；The zero migration calibration circuit is using zero migration calibration potentiometer Rv1.
The zero cross detection circuit can provide zero passage detection precision during small-signal input, and D1 mainly carries to input interface
For protective effect, pressure limiting is carried out to input zero cross signal Vin, prevents overtension from burning circuit.U3 is quick zero-crossing comparator,
By input signal compared with reference to zero-signal, Vout is output zero cross signal.Input signal to zero-crossing comparator U3 it
Between add two-stage amplifying circuit, the main purpose of this two-stage amplifying circuit be improve input signal slope, make small-signal
Slope bring up to it is suitable with the slope of big signal, make finally from zero-crossing comparator U3 output Vout signal precision meet using will
Ask.In addition, increasing zero migration calibration potentiometer Rv1 at first order amplifying circuit U1, two-stage amplifying circuit is adjusted by Rv1
Potential shift amount, improve the accuracy of detection of circuit.
Error correction timer is provided with the data processing unit of the main frame, is set in the data processing unit of slave
Zero-crossing timing timer is equipped with, with reference to Fig. 3, the nuclear-phase method of the wireless phase checking device comprises the following steps：
(1) host supervision sends very first time synchronizing signal to after zero cross signal to slave, and starts error correction
Timer；Now the slave synchronous averaging zero-crossing timing timer and zero passage monitoring, and return the second time synchronized to main frame
Signal；
(2) the second time synchronizing signal that the main frame returns according to slave, error correction timer count is stopped, and will
The error correction time data of gained is sent to slave；Now slave monitors to stop zero-crossing timing timer during zero cross signal；
(3) slave calculates phase difference value by zero-crossing timing data and error correction time data and shown, and
The phase data is sent to main frame；Wherein, the calculation formula of the phase difference value is as follows：
D=(t1-t2)/T*360 °
Wherein, d is phase difference (unit：Degree), t1 is zero-crossing timing, and t2 is the error correction time, and T is zero cross signal week
Phase；
(4) main frame receives the phase data, and is shown in man-machine interaction unit.
The present invention can carry out the measurement of phase difference to the circuit of identical electric voltage frequency, be made by the cooperation of main frame and slave
With, the nuclear phase operation of remote point-to-point transmission is realized by the way of wireless telecommunications, can be neatly low to Circuit Fault on Secondary Transformer
Pressure carries out nuclear phase experiment, eliminates workload of the staff in working site arranging signal cable, not only causes operating process
Simply, nuclear phase result is accurate, and saves human cost, shortens the working time, improves operating efficiency.
Embodiments of the invention are the foregoing is only, are not intended to limit the scope of the invention, it is every to utilize this hair
The equivalent structure or equivalent flow conversion that bright specification and accompanying drawing content are made, or directly or indirectly it is used in other related skills
Art field, is included within the scope of the present invention.
Claims (6)
1. a kind of wireless phase checking device of low pressure, it is characterised in that including main frame and slave, pass through nothing between the main frame and slave
Line signal carries out data interaction；
The main frame is identical with the structure of slave, including signal gathering unit, zero passage sampling unit, data processing unit, with
Man-machine interaction unit, data transmission unit, the phase verification unit of data processing unit interconnection, signal gathering unit, mistake
Zero sampling unit, phase verification unit are sequentially connected；
The zero passage sampling unit includes zero cross detection circuit, level shifting circuit, and the zero cross detection circuit includes going here and there successively
First order amplifying circuit, second level amplifying circuit, the Zero-cross comparator circuit of connection, the input connection of first order amplifying circuit are limited
Voltage protection circuit, power end are connected with zero migration calibration circuit.
2. the wireless phase checking device of low pressure according to claim 1, it is characterised in that in the zero cross detection circuit,
The first order amplifying circuit includes voltage comparator U1, resistance R1, R2, resistance R1 one end connection U1 reverse input
End, other end ground connection, resistance R2 one end connection U1 reverse input end, other end connection U1 output end；
The second level amplifying circuit includes voltage comparator U2, resistance R3, R4, resistance R3 one end connection U2 reverse input
End, other end ground connection, resistance R4 one end connection U2 reverse input end, other end connection U2 output end；
The Zero-cross comparator circuit includes zero-crossing comparator U3, resistance R5, resistance R5 be connected in parallel on U3 power end and output end it
Between；
One end connection signal input part of the pressure limited protection circuit, other end ground connection, using two diodes in parallel, wherein one
The positive pole of individual diode is connected with the negative pole of another diode；
The zero migration calibration circuit is using zero migration calibration potentiometer Rv1.
3. the wireless phase checking device of low pressure according to claim 1, it is characterised in that the letter of the signal gathering unit collection
Number include voltage signal, current signal, the voltage class ranges of voltage signal are 10V -500V, the measurement range of current signal
For 10mA -10A.
4. the wireless phase checking device of low pressure according to claim 1, it is characterised in that the data processing unit uses ARM
Single-chip microcomputer.
5. based on the wireless nuclear-phase method of the wireless phase checking device of low pressure described in claim 1, comprise the following steps：The main frame
Data processing unit in be provided with error correction timer, being provided with zero-crossing timing in the data processing unit of the slave determines
When device,
(1) host supervision sends very first time synchronizing signal to after zero cross signal to slave, and starts error correction timing
Device；Now the slave synchronous averaging zero-crossing timing timer and zero passage monitoring, and return the second time synchronizing signal to main frame；
(2) the second time synchronizing signal that the main frame returns according to slave, error correction timer count is stopped, and by gained
Error correction time data be sent to slave；Now slave monitors to stop zero-crossing timing timer during zero cross signal；
(3) slave calculates phase difference value by zero-crossing timing data and error correction time data and shown, and should
Phase data is sent to main frame；
(4) main frame receives the phase data, and is shown on man-machine interaction unit.
6. wireless nuclear-phase method according to claim 5, it is characterised in that the calculation formula of the phase difference value is as follows：
D=(t1-t2)/T*360 °
Wherein, d is phase difference, and t1 is zero-crossing timing, and t2 is the error correction time, and T is the zero cross signal cycle.
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| CN201710805694.XA CN107402331A (en) | 2017-09-08 | 2017-09-08 | Low pressure is wireless phase checking device and its method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710805694.XA CN107402331A (en) | 2017-09-08 | 2017-09-08 | Low pressure is wireless phase checking device and its method |
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Family
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| CN201710805694.XA Pending CN107402331A (en) | 2017-09-08 | 2017-09-08 | Low pressure is wireless phase checking device and its method |
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Cited By (2)
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| CN109521303A (en) * | 2018-12-07 | 2019-03-26 | 武汉纳思系统技术有限公司 | A kind of modular wireless multiple pass and method |
| CN110208603A (en) * | 2019-06-05 | 2019-09-06 | 江南大学 | A kind of transformer voltage phase difference measuring apparatus and measurement method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109521303A (en) * | 2018-12-07 | 2019-03-26 | 武汉纳思系统技术有限公司 | A kind of modular wireless multiple pass and method |
| CN109521303B (en) * | 2018-12-07 | 2020-09-18 | 武汉纳思系统技术有限公司 | Modular wireless multi-channel and method |
| CN110208603A (en) * | 2019-06-05 | 2019-09-06 | 江南大学 | A kind of transformer voltage phase difference measuring apparatus and measurement method |
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