CN106597133A - Method and device for recognition and identification of low-voltage power grid single-phase line phase sequence - Google Patents
Method and device for recognition and identification of low-voltage power grid single-phase line phase sequence Download PDFInfo
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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Abstract
The invention relates to a method and a device for recognition and identification of a low-voltage power grid single-phase line phase sequence. The device comprises a voltage signal recorder and a mobile phone, wherein the mobile phone is connected with the voltage signal recorder in a wireless communication manner and is provided with phase sequence classification software. The voltage signal recorder is a handheld portable terminal and comprises a measuring pen, a transformer unit, a zero-crossing monitoring unit, an MCU unit, a power supply unit, an RTC unit, a button unit, a display unit and a camera module. The voltage signal recorder measures the voltage of a branch circuit through the measuring pen and performs scanning through the camera for acquiring address information of a measuring point. The voltage signal recorder is connected with the phase sequence classification software on the mobile phone in a Bluetooth communication manner, thereby realizing data exchange. The measured data are automatically uploaded to the phase sequence classification software through Bluetooth communication. The phase sequences of the measured signals are automatically classified to four classes on the mobile phone, namely an A phase, a B phase, a C phase and an unidentified phase. The method and the device effectively settle a phase sequence identification problem.
Description
Technical field
The present invention relates to low-voltage network technical field, more particularly to a kind of low voltage electric network uniline phase sequence identification point
Class method and device.
Background technology
With the development of social economy, low-voltage customer is to electricity consumption reliability and the requirement more and more higher of power quality, country
Management and improvement of the electrical network to user's energy consumption is also paid attention to further.There are problems that substantial amounts of low-voltage in rural area at present, study carefully it
Reason, nothing more than three-phase load unbalance, power factor be relatively low, harmonic content is larger, the wherein relatively low harmonic of power factor contains
Amount is larger can to realize local compensation by compensation device, but for three-phase load unbalance, then needs single-phase by changing
The phase sequence of user is adjusting.For substantial amounts of old circuit, there is Late reformation, cannot confirm that existing single-phase load connects
The accurate phase sequence for entering, causes commutation work to be normally carried out.
It is existing to survey mutually and phase checking device, only for three-phase line, by gather three-phase voltage signal confirm A, B, C phase it
Between phase relation confirming the separate of three-phase, uniline is felt simply helpless, there is no a kind of effective means to uniline
Separate distinguished and classified.Patent of the present invention is related to the identification of low voltage electric network uniline phase sequence and sorting technique, Ke Yi
In one measure the cycle, the voltage signal of each branched line node under same transformator is measured at any time, you can according to three-phase
The phase relation of voltage carries out split-phase classification to tested branched line, need to only determine the phase sequence of one of branch signal, so that it may
To automatically determine the phase sequence of all branches, with simple to operate, the features such as easy to carry.
The content of the invention
In view of this, it is an object of the invention to provide a kind of low voltage electric network uniline phase sequence method for identifying and classifying and dress
Put, the method can classify to the phase sequence of single-phase branched line, be controlling for power system low voltage electric network three-phase load unbalance
Reason provides basic data.
The present invention is realized using following methods：A kind of low voltage electric network uniline phase sequence method for identifying and classifying, its feature exists
In：Comprise the following steps：
Step S1：Gathered in the 2ms of the one A phase node in distribution transformer 0.4kV sides using a voltage signal monitor
Voltage negative growth zero-acrross ing moment, records the difference of adjacent 2 negative growth zero-acrross ing moments closest to the temporal information of 0.02s, is designated as t0；
Step S2：Again all phase sequences to be determined in distribution transformer 0.4kV sides are gathered using the voltage signal monitor
N measurement point 2ms in voltage negative growth zero-acrross ing moment, record the difference of adjacent 2 negative growth zero-acrross ing moments closest to 0.02s
Temporal information, be designated as t1, t2..., tx..., tn；
Step S3：The data transfer for collecting a to mobile phone is carried out into phase sequence classification, and calculates Phase-Sequence Difference
△tx=(| tx-t0The % of | × 10000) (10000 × T)
Wherein, △ txIt is Phase-Sequence Difference；T=0.02s is the power-frequency voltage cycle；% represents complementation；
Step S4：Judge △ txWhich belong within span：If △ is tx∈(Δt0°, Δ t0°+ ε), measurement point x with
Known phase sequence homophase, is identified as A phases；If △ is tx∈(Δt120°- ε, Δ t120°+ ε), measurement point x is more delayed than known phase sequence 120 °,
It is identified as B phases；If △ is tx∈(Δt240°- ε, Δ t240°+ ε), measurement point x is more delayed than known phase sequence 240 °, is identified as C phases；Record
The phase sequence information of n measurement point.
Step S5：Return to step S3, and execution step S3 and step S4 are circulated, until x=n, exports analysis report.
Further, the difference of adjacent 2 negative growth zero-acrross ing moments of step S1 and step S2 closest to 0.02s when
Between information txDetermine as follows：
tx=tm, x=0,1 ..., n
M=index (min | ti-ti-1- 0.02 |), m ∈ i, i=1,2 ..., 10
Wherein, n is the measure dot number of phase sequence to be determined；Index represents retrieval elements function；Electricity in 2ms to be collected
Pressure negative growth zero-acrross ing moment has 11, and m is the difference of adjacent 2 negative growth zero-acrross ing moments closest to 0.02s moment points.
Further, step S4 specifically includes following steps：
Step S41：For three-phase voltage waveform, advanced 120 ° of the B phases of A phases, 240 ° of advanced C phases；In the same manner, the advanced C phases of B phases
120 °, 240 ° of advanced A phases；Advanced 120 ° of the A phases of C phases, 240 ° of advanced B phases；If x-th measurement point is A phases, for the ripple of homophase
Shape, the negative growth zero crossing moment of the two differs only by k power frequency period T, i.e.,：
tx=t0±kT
Wherein, k is integer；T=0.02s.
Δt0°Determine as follows：
Δt0°=(| tx-t0The % of | × 10000) (10000 × T)=0
In the same manner, if x-th measuring node is B phases, due to A phase 120 ° of B phases in advance, then
tx=t0±(k+1/3)T
Δt120°Determine as follows：
Δt120°=(| tx-t0The % of | × 10000) (10000T)=1/3 × 10000T ≈ 67
If x-th measuring node is C phases, due to A phase 240 ° of C phases in advance, then
tx=t0±(k+2/3)T
Δt240°Determine as follows：
Δt240°=(| tx-t0The % of | × 10000) (10000T)=2/3 × 10000T ≈ 133
Step S42：It is contemplated that the frequency error and measurement error of electrical network, error threshold ε determines as follows：
ε=εm+max(εs,εe)=2ms
Wherein, mains frequency fluctuation maximum error εs=1/49.5-1/50.5=0.0004s；Instrument measuring precision εe=
1ms；Measurement error εm=1ms；Measurement error is cumulative errors, and the error of first measurement point and last measurement point is most
Greatly, error does not allow more than 0.5ms in a measure the cycle, and certainty of measurement is 1ms, therefore actual maximum measurement error is 1ms；
Step S43：If phase sequence known to the measurement point of collection is B phases or C phases, return to step S41 is surveyed using same step
Each node phase sequence information.
The present invention is also realized using below scheme：A kind of low voltage electric network uniline phase sequence recognizes sorter, including one
Voltage signal monitor and one is by the coupled mobile phone for being provided with phase sequence classification software of communication；The electricity
Pressure signal recorder is a hand-portable terminal, including measurement test pencil, transformer unit, zero passage monitoring means, MCU mono-
Unit, power supply unit, RTC units, push-button unit, display unit, camera module；The voltage signal monitor passes through measurement table
The voltage of measurement branches circuit, then scanned by photographic head, obtains the address information of measurement point, by Blue-tooth communication method with
Phase sequence classification software connection on mobile phone, carries out the interaction of data, and the data of measurement are automatically uploaded to phase sequence by Bluetooth communication
Classification software, four classes are divided on mobile phone by the phase sequence of measurement signal automatically：A phase, B phase, C phase and unidentified phase, if passing through
Not, the phase sequence classification software is reclassified the sequence of a manual modification wherein phase automatically.
Further, the measurement test pencil is made up of red test pencil with black test pencil, respectively contact measurement 220V branch lines
The L and N-terminal on road, it is still effective in the case of reversal connection；The 220V voltage signals of Jing measurement test pencil collections pass through single-phase transformer units
Small voltage is converted into, zero passage monitoring means is entered after filtering, sine wave is transformed into into the synperiodic square-wave signal of same phase,
The signal enters the external interrupt pin of MCU units after high speed photo coupling isolation.
Further, the MCU units by high performance ARM singlechip groups into it is monitored after square-wave signal trailing edge
The moment that wave recording occurs, and the address information on synchronous recording waveform sequence number and institute's survey line road, and uploaded by blue tooth interface
To mobile phone, and the bar code or 2 D code information of Line Address are surveyed by camera module identification；The RTC units to for
MCU units provide accurate temporal information, and time degree of accuracy is 1ms, and error is less than 0.5ms in 1 measure the cycle.
Further, the push-button unit includes 6 mechanical keys, including starting key, setting button, detection/confirm
Button, removing/return button, on turn over button and under turn over button；The starting key is used to start shooting and control of shutting down；It is described to set
Button is put including four options：Sequencing starts, phase sequence is arranged, bluetooth connection, and address is arranged；By above turn over button, under turn over button
Coordinating with acknowledgement key carries out corresponding function；Sequencing startupoptions are this to open the batch phase sequence test job, instrument
The DATA REASONING work of batch is recompiled, and will record hereafter all of measurement data；Phase sequence setting options were to test
Cheng Zhong, arranges certain measurement circuitry for A, B, C any one phase sequence, is set in the case of the known branched line phase sequence
Put, arranged by last time and be defined, and remove the phase sequence for above arranging；Bluetooth connection option is to open blue tooth interface, and handss
Machine carries out pairing connection；Address setting options selecting Address Recognition, be manually entered and be not input into；Detection/the confirmation is pressed
Key is confirmed whether to record or remove this test letter after terminating to open the detection of branched line, detection according to test result
Breath；The removing/return button is to remove test information or return from function menu；Turn on described button with it is described under turn over by
Key is to check test data or function menu.
Further, the display unit includes a color LCD screen, to show test information and function menu, coordinates
Push-button unit starts test or query-related information；Said supply unit includes 5V rechargeable lithium battaries and coupled
Power-switching circuit, to the power supply that 5V and 3.3V are provided for system.
Further, the phase sequence classification software includes digital independent, information classification, phase sequence modification and information transmission four
Individual functional unit；The digital independent component selects reading to be stored in letter to set up the connection with voltage signal monitor
Any data message of batch on number monitor；Described information classification component to according to phase sequence sorting algorithm, to measurement data
Phase sequence classified automatically；The phase sequence modification component to some measurement point of manual modification phase sequence, other measurement points
Phase sequence reclassified according to phase sequence sorting algorithm；Described information transfer assembly is to send sorted data to long-range number
According to storehouse, enter row information secondary maintenance.
Further, the phase sequence sorting algorithm that the voltage signal monitor is carried out with mobile phone is comprised the following steps：
Step S1：Start the test of batch phase sequence：New tables of data is set up, the sequence number of measurement point is zeroed；
Step S2：Detection data：Proceeded as follows according to the content that information is arranged：Link address identification is selected, is first used
Photographic head scanning recognition address of node information to be measured, including the table number bar code information or 2 D code information on ammeter, for
This operation is skipped in the selection of zero-address information；Selection is manually entered information, manually the input information on phase sequence classification software, and will
Information is passed to voltage signal monitor, for zero-address information can select skip this operation；Not input information is selected, then
Skip this operation；Then judge whether there is control source on test pencil, if not having, point out to be not detected by voltage；If there is voltage defeated
Enter, the time of the signal generation of 10 cycles of continuous measurement, take closest that signal for 50Hz of signal frequency, and tracer signal
Sequence number, moment for occurring of address information, trailing edge and signal frequency, and store data in internal memory；By display screen
Show record information；If the frequency of signal is less than 49Hz, remind whether user is recorded, in user the situation of record is confirmed
Under, record related data；
When completing to be detected again after above step next time, data record sequence number Jia 1 automatically；
In detection process, the phase sequence of any measuring node is set at any time, and deletes what is arranged before this batch measurement
Phase sequence information, phase sequence information is by being defined that last time is arranged；
Step S3：After being completed, the batch measurement data is all uploaded in mobile phone by Blue-tooth communication method
Phase sequence is classified software, being capable of manual modification phase sequence information again in phase sequence classification software；
Step S4：Mobile phone carries out phase sequence classification, specifically includes following steps：
Step S41：All of measurement point is scanned, last measurement point for confirming phase sequence is extracted, as the 0th
Measurement point, other measurement points are adjusted to subsequent node；
It is assumed that certain confirms that the phase sequence of the node of phase sequence is m phases, wherein m=A, B, C, there is the moment for T in signal0；
Step S42：A measurement point is extracted, the node signal occurs the moment for Tn；Judge whether it meets following criterion
One of condition：
Criterion one：(|Tn-TiThe %10000T of | × 10000)≤ε, % represent and rem, similarly hereinafter；
Criterion two：67-ε≤(|Tn-TiThe %10000T of | × 10000)≤67+ ε；
Criterion three：133-ε≤(|Tn-TiThe %10000T of | × 10000)≤133+ ε；
If meeting criterion one, the measurement point and the 0th measurement point homophase；If meeting criterion two, the measurement point is delayed
0th 120 ° of measurement point；If meeting criterion three, delayed 0th 240 ° of the measurement point of the measurement point；If being unsatisfactory for three criterion bars
Part, then be classified as other, in fact it could happen that measurement error, it is also possible to the 0th measurement point is not belonging to same transformator
Under measurement point；
Step S43：Judge whether all nodes confirm to finish, if not finishing, jump to step S42, if finish performing step
Rapid S44；
Step S44：According to judged result, measuring node is divided into into four classes, A phase, B phase, C phase and other nodes, output point
Analysis report；
Step S45：The phase sequence of each measuring node is recognized one by one, and is sorted out, if the one of node of manual modification
Phase sequence, according to delayed phase relation, software is sequentially adjusted according to the phase place of following each node of relation pair：By A phases manually
B phases are adjusted to, then original B phase nodes are automatically regulated to be C phases, former C phases node is automatically regulated to be A phases；A phases are manually adjusted as C phases,
Then original B phase nodes are automatically regulated to be A phases, and former C phases node is automatically regulated to be B phases；B phases are manually adjusted as A phases, then original C phases are saved
Point is automatically regulated to be B phases, and former A phases node is automatically regulated to be C phases；B phases are manually adjusted as C phases, then original C phase node adjust automaticallies
For A phases, former A phases node is automatically regulated to be B phases；C phases are manually adjusted as A phases, then original A phase nodes are automatically regulated to be B phases, former A
Phase node is automatically regulated to be C phases；C phases are manually adjusted as B phases, then original A phase nodes are automatically regulated to be C phases, and former B phases node is automatic
It is adjusted to A phases；The node for belonging to other node type attributes is adjusted, and according to step S44 one time is recalculated.
Compared to prior art, the invention has the advantages that：The present invention is in clearly one of measuring node phase
In the case of position, by stand-alone device, the moment of the generation of the voltage trailing edge of other measurement points is recorded at any time, by phase sequence point
Class algorithm automatically to same transformator under multiple measuring nodes classified automatically, it is effective to solve asking for phase sequence identification
Topic.Current technology means there is no method to solve the problems, such as extensive node phase sequence identification.
Description of the drawings
Fig. 1 is the schematic flow sheet of the phase sequence method for identifying and classifying of the present invention.
Fig. 2 is the principle schematic that the phase sequence of the present invention recognizes sorter.
Fig. 3 is the principle schematic of the voltage signal monitor of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawings and embodiment the present invention will be further described.
The present embodiment provides a kind of low voltage electric network uniline phase sequence method for identifying and classifying, and applicable situation is that low pressure 380V is matched somebody with somebody
Electric line, measures 220V phase voltages, and all single-phase measurement point under same three-phase transformer is classified, as shown in figure 1,
Comprise the following steps：
Step S1：Gathered in the 2ms of the one A phase node in distribution transformer 0.4kV sides using a voltage signal monitor
Voltage negative growth zero-acrross ing moment, the difference for recording adjacent 2 negative growth zero-acrross ing moments (is accurate to closest to the temporal information of 0.02s
Ms), it is designated as t0；
Step S2：Again all phase sequences to be determined in distribution transformer 0.4kV sides are gathered using the voltage signal monitor
N measurement point 2ms in voltage negative growth zero-acrross ing moment, record the difference of adjacent 2 negative growth zero-acrross ing moments closest to 0.02s
Temporal information (being accurate to ms), be designated as t1, t2..., tx..., tn；
Step S3：The data transfer for collecting a to mobile phone is carried out into phase sequence classification, and calculates Phase-Sequence Difference
△tx=(| tx-t0The % of | × 10000) (10000 × T)
Wherein, △ txIt is Phase-Sequence Difference；T=0.02s is the power-frequency voltage cycle；% represents complementation；
Step S4：Judge △ txWhich belong within span：If △ is tx∈(Δt0°, Δ t0°+ ε), measurement point x with
Known phase sequence homophase, is identified as A phases；If △ is tx∈(Δt120°- ε, Δ t120°+ ε), measurement point x is more delayed than known phase sequence 120 °,
It is identified as B phases；If △ is tx∈(Δt240°-ε, Δ t240°+ ε), measurement point x is more delayed than known phase sequence 240 °, is identified as C phases；Record
The phase sequence information of n measurement point；
Step S5：Return to step S3, and execution step S3 and step S4 are circulated, until x=n, exports analysis report.
In the present embodiment, the difference of adjacent 2 negative growth zero-acrross ing moments of step S1 and step S2 is closest to 0.02s
Temporal information txDetermine as follows：
tx=tm, x=0,1 ..., n
M=index (min | ti-ti-1- 0.02 |), m ∈ i, i=1,2 ..., 10
Wherein, n is the measure dot number of phase sequence to be determined；Index represents retrieval elements function；Electricity in 2ms to be collected
Pressure negative growth zero-acrross ing moment has 11, and m is the difference of adjacent 2 negative growth zero-acrross ing moments closest to 0.02s moment points.
In the present embodiment, step S4 specifically includes following steps：
Step S41：For three-phase voltage waveform, advanced 120 ° of the B phases of A phases, 240 ° of advanced C phases；In the same manner, the advanced C phases of B phases
120 °, 240 ° of advanced A phases；Advanced 120 ° of the A phases of C phases, 240 ° of advanced B phases；If x-th measurement point is A phases, for the ripple of homophase
Shape, the negative growth zero crossing moment of the two differs only by k power frequency period T, i.e.,：
tx=t0±kT
Wherein, k is integer；T=0.02s.
Δt0°Determine as follows：
Δt0°=(| tx-t0The % of | × 10000) (10000 × T)=0
In the same manner, if x-th measuring node is B phases, due to A phase 120 ° of B phases in advance, then
tx=t0±(k+1/3)T
Δt120°Determine as follows：
Δt120°=(| tx-t0The % of | × 10000) (10000T)=1/3 × 10000T ≈ 67
If x-th measuring node is C phases, due to A phase 240 ° of C phases in advance, then
tx=t0±(k+2/3)T
Δt240°Determine as follows：
Δt240°=(| tx-t0The % of | × 10000) (10000T)=2/3 × 10000T ≈ 133
Step S42：It is contemplated that the frequency error and measurement error of electrical network, error threshold ε determines as follows：
ε=εm+max(εs,εe)=2ms
Wherein, mains frequency fluctuation maximum error εs=1/49.5-1/50.5=0.0004s；Instrument measuring precision εe=
1ms；Measurement error εm=1ms；Measurement error is cumulative errors, and the error of first measurement point and last measurement point is most
Greatly, error does not allow more than 0.5ms in a measure the cycle, and certainty of measurement is 1ms, therefore actual maximum measurement error is 1ms；
Step S43：If phase sequence known to the measurement point of collection is B phases or C phases, return to step S41 is surveyed using same step
Each node phase sequence information.
In the present embodiment, a kind of low voltage electric network uniline phase sequence recognizes sorter, as shown in Figures 2 and 3, including
One voltage signal monitor and one is by the coupled mobile phone for being provided with phase sequence classification software of communication；It is described
Voltage signal monitor is a hand-portable terminal, including measurement test pencil, transformer unit, zero passage monitoring means, MCU mono-
Unit, power supply unit, RTC units, push-button unit, display unit, camera module；The voltage signal monitor passes through measurement table
The voltage of measurement branches circuit, then scanned by photographic head, obtains the address information of measurement point, by Blue-tooth communication method with
Phase sequence classification software connection on mobile phone, carries out the interaction of data, and the data of measurement are automatically uploaded to phase sequence by Bluetooth communication
Classification software, four classes are divided on mobile phone by the phase sequence of measurement signal automatically：A phase, B phase, C phase and unidentified phase, if passing through
Not, the phase sequence classification software is reclassified the sequence of a manual modification wherein phase automatically.
In the present embodiment, the measurement test pencil is made up of red test pencil with black test pencil, contact measurement 220V point respectively
The L and N-terminal of branch line, it is still effective in the case of reversal connection；The 220V voltage signals of Jing measurement test pencil collections pass through single-phase transformer
Cell translation enters zero passage monitoring means into small voltage, after filtering, and sine wave is transformed into into the synperiodic square wave of same phase
Signal, the signal enters the external interrupt pin of MCU units after high speed photo coupling isolation.
In the present embodiment, the MCU units by high performance ARM singlechip groups into, its monitor square-wave signal decline
Along the moment that rear wave recording occurs, and the address information on synchronous recording waveform sequence number and institute's survey line road, and by blue tooth interface
Mobile phone is uploaded to, and the bar code or 2 D code information of Line Address are surveyed by camera module identification；The RTC units are used
To provide accurate temporal information as MCU units, time degree of accuracy is 1ms, and error is less than 0.5ms in 1 measure the cycle.
In the present embodiment, the push-button unit include 6 mechanical keys, including starting key, arrange button, detection/
Confirm button, remove/return button, on turn over button and under turn over button；The starting key is used to start shooting and control of shutting down；Institute
Stating setting button includes four options：Sequencing starts, phase sequence is arranged, bluetooth connection, and address is arranged；By above turn over button, under turn over
Button and acknowledgement key coordinate carries out corresponding function；Startupoptions are sequenced is to open the batch phase sequence test job, instrument
This batch of DATA REASONING work is recompiled, and will record hereafter all of measurement data；Phase sequence setting options are to survey
During examination, certain measurement circuitry is set for A, B, C any one phase sequence, if carrying out in the case of the known branched line phase sequence
Arrange, arranged by last time and be defined, and remove the phase sequence for above arranging；Bluetooth connection option to open blue tooth interface, and
Mobile phone carries out pairing connection；Address setting options selecting Address Recognition, be manually entered and be not input into；Detection/the confirmation
Button is confirmed whether to record or remove this test letter after terminating to open the detection of branched line, detection according to test result
Breath；The removing/return button is to remove test information or return from function menu；Turn on described button with it is described under turn over by
Key is to check test data or function menu.
In the present embodiment, the display unit includes a color LCD screen, to show test information and function menu,
Push-button unit is coordinated to start test or query-related information；Said supply unit include a 5V rechargeable lithium battaries and and its
Connected power-switching circuit, to the power supply that 5V and 3.3V are provided for system.
In the present embodiment, the phase sequence classification software includes that digital independent, information classification, phase sequence modification and information are passed
Send four functional units；The digital independent component selects to read storage to set up the connection with voltage signal monitor
The data message of any batch on signal recorder；Described information classification component to according to phase sequence sorting algorithm, to measurement
The phase sequence of data is classified automatically；The phase sequence modification component to some measurement point of manual modification phase sequence, other survey
The phase sequence of amount point is reclassified according to phase sequence sorting algorithm；Described information transfer assembly is sorted data to be sent to far
Journey data base, enters row information secondary maintenance.
In the present embodiment, the phase sequence sorting algorithm that the voltage signal monitor is carried out with mobile phone is comprised the following steps：
Step S1：Start the test of batch phase sequence：New tables of data is set up, the sequence number of measurement point is zeroed；
Step S2：Detection data：Proceeded as follows according to the content that information is arranged：Link address identification is selected, is first used
Photographic head scanning recognition address of node information to be measured, including the table number bar code information or 2 D code information on ammeter, for
This operation is skipped in the selection of zero-address information；Selection is manually entered information, manually the input information on phase sequence classification software, and will
Information is passed to voltage signal monitor, for zero-address information can select skip this operation；Not input information is selected, then
Skip this operation；Then judge whether there is control source on test pencil, if not having, point out to be not detected by voltage；If there is voltage defeated
Enter, the time of the signal generation of 10 cycles of continuous measurement, take closest that signal for 50Hz of signal frequency, and tracer signal
Sequence number, moment for occurring of address information, trailing edge and signal frequency, and store data in internal memory；By display screen
Show record information；If the frequency of signal is less than 49Hz, remind whether user is recorded, in user the situation of record is confirmed
Under, record related data；
When completing to be detected again after above step next time, data record sequence number Jia 1 automatically；
In detection process, the phase sequence of any measuring node is set at any time, and deletes what is arranged before this batch measurement
Phase sequence information, phase sequence information is by being defined that last time is arranged；
Step S3：After being completed, the batch measurement data is all uploaded in mobile phone by Blue-tooth communication method
Phase sequence is classified software, being capable of manual modification phase sequence information again in phase sequence classification software；
Step S4：Mobile phone carries out phase sequence classification, specifically includes following steps：
Step S41：All of measurement point is scanned, last measurement point for confirming phase sequence is extracted, as the 0th survey
Amount point, other measurement points are adjusted to subsequent node；
It is assumed that certain confirms that the phase sequence of the node of phase sequence is m phases, wherein m=A, B, C, there is the moment for T in signal0；
Step S42：A measurement point is extracted, the node signal occurs the moment for Tn；Judge whether it meets following criterion
One of condition：
Criterion one：(|Tn-TiThe %10000T of | × 10000)≤ε, % represent and rem, similarly hereinafter；
Criterion two：67-ε≤(|Tn-TiThe %10000T of | × 10000)≤67+ ε；
Criterion three：133-ε≤(|Tn-TiThe %10000T of | × 10000)≤133+ ε；
If meeting criterion one, the measurement point and the 0th measurement point homophase；If meeting criterion two, the measurement point is delayed
0th 120 ° of measurement point；If meeting criterion three, delayed 0th 240 ° of the measurement point of the measurement point；If being unsatisfactory for three criterion bars
Part, then be classified as other, in fact it could happen that measurement error, it is also possible to the 0th measurement point is not belonging to same transformator
Under measurement point；
Step S43：Judge whether all nodes confirm to finish, if not finishing, jump to step S42, if finish performing step
Rapid S44；
Step S44：According to judged result, measuring node is divided into into four classes, A phase, B phase, C phase and other nodes, output point
Analysis report；
Step S45：The phase sequence of each measuring node is recognized one by one, and is sorted out, if the one of node of manual modification
Phase sequence, according to delayed phase relation, software is sequentially adjusted according to the phase place of following each node of relation pair：By A phases manually
B phases are adjusted to, then original B phase nodes are automatically regulated to be C phases, former C phases node is automatically regulated to be A phases；A phases are manually adjusted as C phases,
Then original B phase nodes are automatically regulated to be A phases, and former C phases node is automatically regulated to be B phases；B phases are manually adjusted as A phases, then original C phases are saved
Point is automatically regulated to be B phases, and former A phases node is automatically regulated to be C phases；B phases are manually adjusted as C phases, then original C phase node adjust automaticallies
For A phases, former A phases node is automatically regulated to be B phases；C phases are manually adjusted as A phases, then original A phase nodes are automatically regulated to be B phases, former A
Phase node is automatically regulated to be C phases；C phases are manually adjusted as B phases, then original A phase nodes are automatically regulated to be C phases, and former B phases node is automatic
It is adjusted to A phases；The node for belonging to other node type attributes is adjusted, and according to step S44 one time is recalculated.
The foregoing is only presently preferred embodiments of the present invention, all impartial changes done according to scope of the present invention patent
With modification, should all belong to the covering scope of the present invention.
Claims (10)
1. a kind of low voltage electric network uniline phase sequence method for identifying and classifying, it is characterised in that：Comprise the following steps：
Step S1：Voltage in the 2ms of the one A phase node in distribution transformer 0.4kV sides is gathered using a voltage signal monitor
Negative growth zero-acrross ing moment, records the difference of adjacent 2 negative growth zero-acrross ing moments closest to the temporal information of 0.02s, is designated as t0；
Step S2：Gather n of all phase sequences to be determined in distribution transformer 0.4kV sides using the voltage signal monitor again
Voltage negative growth zero-acrross ing moment in measurement point 2ms, record the difference of adjacent 2 negative growth zero-acrross ing moments closest to 0.02s when
Between information, be designated as t1, t2..., tx..., tn；
Step S3：The data transfer for collecting a to mobile phone is carried out into phase sequence classification, and calculates Phase-Sequence Difference
△tx=(| tx-t0The % of | × 10000) (10000 × T)
Wherein, △ txIt is Phase-Sequence Difference；T=0.02s is the power-frequency voltage cycle；% represents complementation；
Step S4：Judge △ txWhich belong within span：If △ is tx∈(Δt0°, Δ t0°+ ε), measurement point x with it is known
Phase sequence homophase, is identified as A phases；If △ is tx∈(Δt120°- ε, Δ t120°+ ε), measurement point x is more delayed than known phase sequence 120 °, identification
For B phases；If △ is tx∈(Δt240°- ε, Δ t240°+ ε), measurement point x is more delayed than known phase sequence 240 °, is identified as C phases；Record n
The phase sequence information of measurement point.
Step S5：Return to step S3, and execution step S3 and step S4 are circulated, until x=n, exports analysis report.
2. a kind of low voltage electric network uniline phase sequence method for identifying and classifying according to claim 1, it is characterised in that：It is described
Temporal information t of the difference of adjacent 2 negative growth zero-acrross ing moments of step S1 and step S2 closest to 0.02sxIt is true as follows
It is fixed：
tx=tm, x=0,1 ..., n
M=index (min | ti-ti-1- 0.02 |), m ∈ i, i=1,2 ..., 10
Wherein, n is the measure dot number of phase sequence to be determined；Index represents retrieval elements function；Voltage negative in 2ms to be collected
Increase zero-acrross ing moment and have 11, m is the difference of adjacent 2 negative growth zero-acrross ing moments closest to 0.02s moment points.
3. a kind of low voltage electric network uniline phase sequence method for identifying and classifying according to claim 1, it is characterised in that：It is described
Step S4 specifically includes following steps：
Step S41：For three-phase voltage waveform, advanced 120 ° of the B phases of A phases, 240 ° of advanced C phases；In the same manner, advanced 120 ° of the C phases of B phases,
Advanced 240 ° of A phases；Advanced 120 ° of the A phases of C phases, 240 ° of advanced B phases；If x-th measurement point is A phases, for the waveform of homophase, the two
The negative growth zero crossing moment differ only by k power frequency period T, i.e.,：
tx=t0±kT
Wherein, k is integer；T=0.02s.
Δt0°Determine as follows：
Δt0°=(| tx-t0The % of | × 10000) (10000 × T)=0
In the same manner, if x-th measuring node is B phases, due to A phase 120 ° of B phases in advance, then
tx=t0±(k+1/3)T
Δt120°Determine as follows：
Δt120°=(| tx-t0The % of | × 10000) (10000T)=1/3 × 10000T ≈ 67
If x-th measuring node is C phases, due to A phase 240 ° of C phases in advance, then
tx=t0±(k+2/3)T
Δt240°Determine as follows：
Δt240°=(| tx-t0The % of | × 10000) (10000T)=2/3 × 10000T ≈ 133
Step S42：It is contemplated that the frequency error and measurement error of electrical network, error threshold ε determines as follows：
ε=εm+max(εs,εe)=2ms
Wherein, mains frequency fluctuation maximum error εs=1/49.5-1/50.5=0.0004s；Instrument measuring precision εe=1ms；Survey
Amount error εm=1ms；Measurement error is that the error of cumulative errors, first measurement point and last measurement point is maximum, one
Error does not allow more than 0.5ms in measure the cycle, and certainty of measurement is 1ms, therefore actual maximum measurement error is 1ms；
Step S43：If phase sequence known to the measurement point of collection is B phases or C phases, return to step S41 surveys each section using same step
Point phase sequence information.
4. a kind of low voltage electric network uniline phase sequence recognizes sorter, it is characterised in that：Including a voltage signal monitor with
And one by communication it is coupled be provided with phase sequence classify software mobile phone；The voltage signal monitor is one
Individual hand-portable terminal, including measurement test pencil, transformer unit, zero passage monitoring means, MCU units, power supply unit, RTC be mono-
Unit, push-button unit, display unit, camera module；The voltage signal monitor is by measurement test pencil measurement branches circuit
Voltage, then scanned by photographic head, the address information of measurement point is obtained, by the phase sequence classification on Blue-tooth communication method and mobile phone
Software connects, and carries out the interaction of data, and the data of measurement are automatically uploaded to phase sequence classification software by Bluetooth communication, on mobile phone
Automatically the phase sequence of measurement signal is divided into into four classes：A phase, B phase, C phase and unidentified phase, if manually changing a wherein phase
Not, the phase sequence classification software is reclassified sequence automatically.
5. a kind of low voltage electric network uniline phase sequence according to claim 4 recognizes sorter, it is characterised in that：It is described
Measurement test pencil is made up of red test pencil with black test pencil, respectively the L and N-terminal of contact measurement 220V branched lines, in the case of reversal connection
It is still effective；The 220V voltage signals of Jing measurement test pencil collections are converted into small voltage by single-phase transformer units, by filtering
Enter zero passage monitoring means afterwards, sine wave be transformed into into the synperiodic square-wave signal of same phase, the signal by high speed photo coupling every
From the external interrupt pin of rear entrance MCU units.
6. a kind of low voltage electric network uniline phase sequence according to claim 4 recognizes sorter, it is characterised in that：It is described
MCU units by high performance ARM singlechip groups into, it monitors the moment that wave recording after square-wave signal trailing edge occurs, and
Synchronous recording waveform sequence number and the address information on institute's survey line road, and mobile phone is uploaded to by blue tooth interface, and by imaging head mould
The bar code or 2 D code information of Line Address is surveyed in group identification；The RTC units for MCU units to provide the accurate time
Information, time degree of accuracy is 1ms, and error is less than 0.5ms in 1 measure the cycle.
7. a kind of low voltage electric network uniline phase sequence according to claim 4 recognizes sorter, it is characterised in that：It is described
Push-button unit include 6 mechanical keys, including starting key, arrange button, detection/confirm button, remove/return button, on
Turn over button and under turn over button；The starting key is used to start shooting and control of shutting down；The setting button includes four options：Survey
Sequence starts, phase sequence is arranged, bluetooth connection, and address is arranged；By above turn over button, under turn over button and acknowledgement key coordinate carry out it is corresponding
Function；Sequencing startupoptions work again to open the batch phase sequence test job, instrument for this batch of DATA REASONING
Coding, will record hereafter all of measurement data；Phase sequence setting options are in test process, to arrange certain measurement circuitry
A, B, C any one phase sequence, is configured in the case of the known branched line phase sequence, is arranged by last time and is defined, and
The phase sequence that removing is above arranged；Bluetooth connection option carries out pairing connection to open blue tooth interface, and mobile phone；Address arranges choosing
Selecting Address Recognition, it is manually entered and is not input into；The detection/confirmation button to open the detection of branched line,
Detection is confirmed whether to record or remove this test information after terminating according to test result；The removing/return button is to clear
Return except test information or from function menu；Turn on described button with it is described under turn over button to check test data or function dish
It is single.
8. a kind of low voltage electric network uniline phase sequence according to claim 4 recognizes sorter, it is characterised in that：It is described
Display unit includes a color LCD screen, to show test information and function menu, coordinates push-button unit to start test or look into
Ask relevant information；Said supply unit includes a 5V rechargeable lithium battaries and coupled power-switching circuit, to
For the power supply that system provides 5V and 3.3V.
9. a kind of low voltage electric network uniline phase sequence according to claim 4 recognizes sorter, it is characterised in that：It is described
Phase sequence classification software includes digital independent, information classification, four functional units of phase sequence modification and information transmission；The data are read
Component is taken to set up the connection with voltage signal monitor, and selects to read the number for being stored in any batch on signal recorder
It is believed that breath；Described information classification component according to phase sequence sorting algorithm, to be classified automatically to the phase sequence of measurement data；It is described
Phase sequence modification component to some measurement point of manual modification phase sequence, the phase sequence of other measurement points is according to phase sequence sorting algorithm weight
New classification；Described information transfer assembly enters row information secondary maintenance to send sorted data to remote data base.
10. a kind of low voltage electric network uniline phase sequence according to claim 4 recognizes sorter, it is characterised in that：Institute
The phase sequence sorting algorithm that state voltage signal monitor is carried out with mobile phone is comprised the following steps：
Step S1：Start the test of batch phase sequence：New tables of data is set up, the sequence number of measurement point is zeroed；
Step S2：Detection data：Proceeded as follows according to the content that information is arranged：Link address identification is selected, first with shooting
Head scanning recognition address of node information to be measured, including the table number bar code information or 2 D code information on ammeter, for without ground
This operation is skipped in the selection of location information；Selection is manually entered information, manually the input information on phase sequence classification software, and by information
Be passed to voltage signal monitor, for zero-address information can select skip this operation；Not input information is selected, is then skipped
This operation；Then judge whether there is control source on test pencil, if not having, point out to be not detected by voltage；If there is control source, even
The time that the signal of 10 cycles of continuous measurement occurs, take closest that signal for 50Hz of signal frequency, and the sequence of tracer signal
Number, moment for occurring of address information, trailing edge and signal frequency, and store data in internal memory；Shown by display screen
Record information；If the frequency of signal is less than 49Hz, remind whether user is recorded, in the case where user confirms record,
Record related data；
When completing to be detected again after above step next time, data record sequence number Jia 1 automatically；
In detection process, the phase sequence of any measuring node is set at any time, and deletes the phase sequence arranged before this batch measurement
Information, phase sequence information is by being defined that last time is arranged；
Step S3：After being completed, the batch measurement data is all uploaded to the phase sequence in mobile phone by Blue-tooth communication method
Classification software, being capable of manual modification phase sequence information again in phase sequence classification software；
Step S4：Mobile phone carries out phase sequence classification, specifically includes following steps：
Step S41：All of measurement point is scanned, last measurement point for confirming phase sequence is extracted, as the 0th measurement
Point, other measurement points are adjusted to subsequent node；
It is assumed that certain confirms that the phase sequence of the node of phase sequence is m phases, wherein m=A, B, C, there is the moment for T in signal0；
Step S42：A measurement point is extracted, the node signal occurs the moment for Tn；Judge its whether meet following criterion it
One：
Criterion one：(|Tn-TiThe %10000T of | × 10000)≤ε, % represent and rem, similarly hereinafter；
Criterion two：67-ε≤(|Tn-TiThe %10000T of | × 10000)≤67+ ε；
Criterion three：133-ε≤(|Tn-TiThe %10000T of | × 10000)≤133+ ε；
If meeting criterion one, the measurement point and the 0th measurement point homophase；If meeting criterion two, the measurement point is delayed 0th
120 ° of measurement point；If meeting criterion three, delayed 0th 240 ° of the measurement point of the measurement point；If being unsatisfactory for three criterions,
It is classified as other, in fact it could happen that measurement error, it is also possible to the survey that is not belonging to the 0th measurement point under same transformator
Amount point；
Step S43：Judge whether all nodes confirm to finish, if not finishing, jump to step S42, if finishing execution step
S44；
Step S44：According to judged result, measuring node is divided into into four classes, A phase, B phase, C phase and other nodes, output analysis report
Accuse；
Step S45：The phase sequence of each measuring node is recognized one by one, and is sorted out, if the phase of the one of node of manual modification
Sequence, according to delayed phase relation, software is sequentially adjusted according to the phase place of following each node of relation pair：A phases are manually adjusted
For B phases, then original B phase nodes are automatically regulated to be C phases, and former C phases node is automatically regulated to be A phases；A phases are manually adjusted as C phases, then it is former
B phase nodes are automatically regulated to be A phases, and former C phases node is automatically regulated to be B phases；B phases are manually adjusted as A phases, then original C phases node from
Dynamic to be adjusted to B phases, former A phases node is automatically regulated to be C phases；B phases are manually adjusted as C phases, then original C phase nodes are automatically regulated to be A
Phase, former A phases node is automatically regulated to be B phases；C phases are manually adjusted as A phases, then original A phase nodes are automatically regulated to be B phases, and former A phases are saved
Point is automatically regulated to be C phases；C phases are manually adjusted as B phases, then original A phase nodes are automatically regulated to be C phases, former B phases node adjust automatically
For A phases；The node for belonging to other node type attributes is adjusted, and according to step S44 one time is recalculated.
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