CN107015073B - Absolute phase sequence measurement system and method - Google Patents
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Abstract
The invention provides an absolute phase sequence measurement system, a reference measurement device acquires phase voltage data of a bus in a transformer substation and phase sequence names of the bus as reference data, a measurement terminal acquires phase voltage data of any line in a power supply range of the transformer substation, the measurement terminal compares the acquired phase voltage data with the reference data and combines the phase sequence names of the bus to obtain the phase sequence names of the phases of the line.
Description
Technical Field
The invention relates to an absolute phase sequence measurement system and method.
Background
In a medium-voltage and low-voltage three-phase alternating current power grid system, due to inconsistent arrangement and transposition of three-phase line wires or due to incorrect wiring of the three-phase line wires on equipment, the phase sequence names marked by nameplates between a transformer substation and a distribution transformer and between different distribution transformers are inconsistent with the actual voltage phases, so that confusion in maintenance and management is caused, and equipment or personal accidents are most likely to be generated. The prior art usually uses a nuclear phase meter to check whether two different live conductors are in phase or out of phase, but this approach does not determine the phase sequence names of the phases of the live conductors, and this approach usually selects the live conductor close to the power supply side as a reference, and the phase sequence names of this live conductor may have been wrong, so a more reliable reference needs to be found to make the phase sequence and phase sequence name measurements.
Disclosure of Invention
The invention aims at overcoming the defects of the prior art, and provides an absolute phase sequence measuring system and method, which are used for determining the phase sequence name of any line belonging to the power supply range of a transformer substation by taking the phase sequence of a bus in the transformer substation as a reference.
The invention is realized by the following technical scheme:
the absolute phase sequence measurement system comprises a reference measurement device for acquiring bus phase voltage data and bus phase sequence names of a transformer substation, a measurement terminal for acquiring branch phase voltage data in a power supply range of the transformer substation, and a server which is in communication connection with the reference measurement device and used for storing the bus phase voltage data and the bus phase sequence names, wherein the measurement terminal is connected with the server through a wireless communication network and used for acquiring the bus phase voltage data and the bus phase sequence names from the server and determining the phase sequence names of the branch phases according to the branch phase voltage data, the bus phase voltage data and the bus phase sequence names.
The invention can be realized by the following technical scheme:
the absolute phase sequence measurement system comprises a reference measurement device for acquiring bus phase voltage data and bus phase sequence names of a transformer substation, a measurement terminal for acquiring branch phase voltage data in a power supply range of the transformer substation, and a server which is in communication connection with the reference measurement device and used for storing the bus phase voltage data and the bus phase sequence names, wherein the measurement terminal is connected with the server through a wireless communication network and used for acquiring the bus phase voltage data and the bus phase sequence names from the server, determining the phase sequence names of the branch phases according to the branch phase voltage data, the bus phase voltage data and the bus phase sequence names, the reference measurement device comprises a first voltage acquisition module for acquiring bus phase voltage, a first singlechip connected with the first voltage acquisition module, a first GPS clock module and a communication module, wherein the first GPS clock module is used for sending a 1PPS pulse signal to the first voltage acquisition module at each specific UTC time point, the first voltage acquisition module is started according to the trigger signal, continuously acquiring phase voltage cycle waveforms of a plurality of buses, and the first singlechip is used for calculating phase voltage cycle waveforms according to the acquired phase voltage values and phase voltage phase frequency values and phase voltage waveform values and communication time values of the buses through the communication modules each time.
Further, the measurement terminal comprises a second voltage acquisition module for acquiring the phase voltages of the branch lines, a second single chip microcomputer connected with the second voltage acquisition module, a second GPS clock module and a wireless communication module, wherein the second GPS clock module is respectively connected with the second single chip microcomputer, the second GPS clock module sends a 1PPS pulse signal to the second voltage acquisition module at a specific UTC time point to serve as a trigger signal, the second voltage acquisition module is started according to the trigger signal, the second single chip microcomputer continuously acquires phase voltage cycle waveforms of a plurality of the branch lines, the second single chip microcomputer calculates the effective value, the frequency and the phase angle of each phase voltage of the branch lines according to the acquired phase voltage cycle waveforms, the voltage acquisition time and the calculation result are stored locally as the phase voltage data of the branch lines, and the bus phase voltage data and the phase voltage effective value, the frequency and the phase angle of each phase of the branch lines are respectively checked through the wireless communication module to determine the phase sequence names of each phase of the branch lines.
Further, the first voltage acquisition module comprises three voltage acquisition sensing elements and corresponding acquisition circuits, and can acquire the three-phase voltage of the bus at the same time; the second voltage acquisition module comprises three voltage acquisition sensing elements and corresponding acquisition circuits, and can acquire the branch three-phase voltage at the same time.
Further, the specific UTC time point is a UTC time integer seconds or a UTC time integer minutes.
Further, the first GPS clock module comprises a first GPS module and a first crystal oscillator clock connected with the first GPS module, and the precision of the first crystal oscillator clock is less than or equal to +/-5 ppm.
Further, the second GPS clock module comprises a second GPS module and a second crystal oscillator clock connected with the second GPS module, and the precision of the second crystal oscillator clock is less than or equal to +/-5 ppm.
Further, the phase sequence names of the phases of the buses are obtained according to the phase sequence of the main equipment of the transformer substation or the phase color identification plate of each phase of the buses, and the main equipment of the transformer substation comprises a transformer or a mutual inductor.
The invention can be realized by the following technical scheme:
an absolute phase sequence measurement method, comprising the steps of:
A. determining the phase sequence names of all phases of the bus according to the phase sequence of the main equipment of the transformer substation or the phase color identification plates of all phases of the bus;
B. when each specific UTC time point arrives, the first acquisition module continuously acquires the phase voltage cycle waveforms of the bus, and when a specific UTC time point arrives, the second acquisition module continuously acquires the phase voltage cycle waveforms of the branch line;
C. according to the collected busbar phase voltage cycle waveform, calculating the effective value, frequency fs and phase angle of each busbar phase voltage, combining the calculation result and the corresponding voltage collection time Ts with the phase sequence names of each busbar phase to form a one-dimensional array Ps [8] = { Ts, fs, usa, Φsa, usb, Φsb, usc and Φsc } as reference data to be uploaded to a server, wherein Ts is the voltage collection time, fs is the busbar voltage frequency, usa is the effective value of busbar A phase voltage, Φsa is the busbar A phase angle, usb is the effective value of busbar B phase voltage, and Φsb is the busbar B phase angle; usc is the effective value of the bus C-phase voltage, and Φsc is the phase angle of the bus C-phase;
D. the method comprises the steps that a server sequentially stores n one-dimensional arrays according to receiving time to form an array Ps [ n ] [8] = { Tsn, fsn, usan, Φsan, usbn, Φsbn, uscn and Φscn }, wherein Tsn is the bus voltage frequency corresponding to the nth voltage acquisition time, fsn is the bus A phase voltage effective value corresponding to the nth voltage acquisition time, usan is the bus A phase voltage effective value corresponding to the nth voltage acquisition time, usbn is the bus B phase voltage effective value corresponding to the nth voltage acquisition time, and Φsbn is the bus B phase angle corresponding to the nth voltage acquisition time; uscn is the effective value of the C-phase voltage of the bus corresponding to the nth voltage acquisition time, and phi scn is the phase angle of the C-phase of the bus corresponding to the nth voltage acquisition time;
E. according to the collected branch phase voltage cycle waveform, calculating effective value, frequency ft and phase angle of branch phase voltage, and combining settlement result and correspondent voltage collection time Tt into one-dimensional array Pt 8]= { Tt, ft, ut1, Φt1, ut2, Φt2, ut3, Φt3} as measurement numberIs stored locally, wherein Tt is the voltage acquisition time, ft is the branch voltage frequency, us1 is the effective value of the first phase voltage of the branch, phi s1 For the phase angle of the first phase of the branch line, U s2 Is the effective value of the second phase voltage of the branch line, phi s2 Phase angles of the second phase of the branch line; u (U) s3 Is the effective value of the third phase voltage of the branch line, phi s3 Phase angles for the spur third phase;
F. the corresponding reference data when the voltage acquisition time is the same (namely Tt=tsm) are acquired from the server, and the measured data are compared with the reference data, specifically:
f1, when the phase angle difference of A, B, C three-phase voltages in the reference data is within the range of 120 degrees+/-epsilon, indicating that the busbar phase voltage is normally collected, and entering a step F2, wherein epsilon is the allowable deviation value of the phase voltage phase difference caused by the neutral point deviation of the three-phase alternating voltage, and the value range is epsilon less than or equal to 15 degrees;
f2, judging whether ft=fsm is met, if yes, indicating that the branch line and the bus belong to the same alternating current synchronous power grid, and entering a step F3;
f3, judging whether delta phi=arccos [ cos (phi ti-phi sjm +theta) ]isless than or equal to delta, if yes, determining that the phase sequence name of the branch line 3 corresponding to phi ti is the same as the phase sequence name of the bus 1 corresponding to phi sjm at the moment, and outputting the determined phase sequence name, otherwise, outputting phase sequence unsynchronized information, wherein m=1, 2, …, n, i=1, 2,3, j=a, b, c, and theta are phase difference compensation values caused by the difference of wiring groups of the voltage conversion equipment between the bus voltage acquisition point and the branch line acquisition point, and the value of delta is determined by the errors of the reference measurement device and the measurement terminal, the errors of the voltage conversion equipment, and the line length between the bus voltage acquisition point and the branch line voltage acquisition point.
Further, the specific UTC time point is a UTC time integer seconds or a UTC time integer minutes.
The invention has the following beneficial effects:
1. the reference measuring device obtains phase voltage data of buses in the transformer substation and phase sequence names of the buses as reference data, the measuring terminal obtains phase voltage data of any line in a power supply range of the transformer substation, the measuring terminal compares the obtained phase voltage data with the reference data, and the phase sequence names of the phases of the line are obtained by combining the phase sequence names of the buses.
2. The reference measuring device collects phase voltage waveforms of buses at each specific UTC time point, calculates a plurality of groups of bus phase voltage data according to the phase voltage waveforms collected for a plurality of times, uploads the phase voltage waveforms to the server, and the measuring terminal collects phase voltage waveforms of a circuit at a certain specific UTC time point, and downloads corresponding bus phase voltage data from the server for comparison after calculating the circuit phase voltage data, so that one reference measuring device can simultaneously support a plurality of measuring terminals to conduct absolute phase sequence measurement without being limited by a place and time to be measured.
3. The reference measuring device and the measuring terminal upload and download data in a non-real-time communication mode, high-reliability and high-speed network transmission data are not needed, and the accuracy of phase sequence measurement is not influenced by factors such as communication network bandwidth, data transmission delay and the like, so that networking development cost and communication cost are reduced.
4. The reference measuring device and the measuring terminal have low time keeping precision requirements, and the use requirements can be met by adopting a crystal oscillator clock with the precision less than or equal to +/-5 ppm, so that the cost is greatly reduced.
5. The method can obtain the result by comparing the effective voltage value, the frequency and the phase angle in the bus phase voltage data and the line phase voltage data, and is simple and effective.
Drawings
The invention is described in further detail below with reference to the accompanying drawings.
Fig. 1 is a schematic diagram of a system structure according to the present invention.
Detailed Description
In an area outside a transformer substation in a power distribution network, the phase sequence names of all phases of any branch lines are determined according to the voltage data of all phases of a transformer substation bus and the phase sequence names of all phases as references, the phase sequence names of all phases of the branch lines obtained in the mode are absolute phase sequences of all phases of the branch lines, as shown in figure 1, the absolute phase sequence measurement device comprises a reference measurement device 2 for obtaining the voltage data of all phases of a transformer substation bus 1 and the phase sequence names of all phases of the bus 1, a measurement terminal 4 for obtaining the voltage data of all phases of the branch line 3 in the power supply range of the transformer substation, a server 5 which is in communication connection with the reference measurement device 2 and is used for storing the voltage data of all phases of the bus 1 and the phase sequence names of all phases of the bus 1, the phase sequence names of all phases of the bus 1 in the transformer substation are obtained according to the phase color identification plates of all phases of the bus 1, the reference measurement device 2 comprises a first voltage acquisition module 21 for acquiring the phase voltage of the bus 1, a first single chip microcomputer 22 connected with the first voltage acquisition module 21, a first GPS clock module 23 and a communication module 24 which are respectively connected with the first single chip microcomputer, the measurement terminal 4 comprises a second voltage acquisition module 41 for acquiring the phase voltage of the branch line 3, a second single chip microcomputer 42 connected with the second voltage acquisition module 41, a second GPS clock module 43 and a wireless communication module 44 which are respectively connected with the second single chip microcomputer 42, the first voltage acquisition module 21 comprises three voltage acquisition sensing elements and corresponding acquisition circuits, the three voltage acquisition sensing elements are respectively and permanently connected with a phase line A, B, C and a zero line N on the low-voltage side of the transformer station transformer 11, the acquisition of the phase A, the phase B and the phase C voltages of the bus 1 can be synchronously carried out, the high-voltage side of the transformer station transformer 11 is connected with the bus 1, the second voltage acquisition module 41 comprises three voltage acquisition sensing elements and corresponding acquisition circuits, the three voltage acquisition sensing elements are respectively and temporarily connected with a phase line A, B, C and a zero line N of a low-voltage side circuit of the power-consumption side transformer 31, the first phase, the second phase and the third phase of the branch line 3 can be acquired simultaneously, the high-voltage side of the power-consumption side transformer 31 is connected with the branch line 1, the first GPS clock module 23 comprises a first GPS module and a first crystal oscillator clock connected with the first GPS module, the precision of the first crystal oscillator clock is +/-5 ppm, the second GPS clock module 43 comprises a second GPS module and a second crystal oscillator clock connected with the second GPS module, the precision of the second crystal oscillator clock is +/-5 ppm, the measurement terminal 4 can be connected with any branch line 3 in a power supply range of a transformer substation, and different branch lines 3 can be connected with different measurement terminals 4.
The absolute phase sequence measurement method comprises the following steps:
A. determining the phase sequence name of the three-phase line of the bus 1 according to the phase color signboard of the three-phase line of the bus 1;
B. the first GPS clock module 23 receives UTC time signals from the GPS satellites 6, when each UTC time arrives for an integer number of seconds, the first GPS clock module 23 sends 1PPS pulse signals to the first voltage acquisition module 21 as trigger signals, the first voltage acquisition module 21 is started according to the trigger signals, continuously acquires phase voltage cycle waveforms of 5 buses 1, A, B, C three-phase voltages of the buses 1 are simultaneously acquired for about 0.1s, acquired data are transmitted to the first singlechip 22, the second GPS clock module 43 receives UTC time signals from the GPS satellites 6, when a certain UTC time arrives for an integer number of seconds, the second clock module 33 sends 1PPS pulse signals to the second voltage acquisition module 41 as trigger signals, the second voltage acquisition module 41 is started according to the trigger signals, continuously acquires phase voltage cycle waveforms of 5 branch lines 3, A, B, C three-phase voltages of the branch lines 3 are simultaneously acquired for about 0.1s, and acquired data are transmitted to the second singlechip 42;
C. the first singlechip 22 calculates the effective value, the frequency fs and the phase angle of each phase voltage of the bus 1 according to the received three-phase voltage cycle waveform of the bus 1, combines the calculated result and the corresponding voltage acquisition time Ts with the phase sequence names of the three-phase lines of the bus 1 to form a one-dimensional array Ps [8] = { Ts, fs, usa, Φsa, usb, Φsb, usc and Φsc } as reference data to be uploaded to the server 5, wherein Ts is the voltage acquisition time, fs is the bus voltage frequency, usa is the bus A phase voltage effective value, Φsa is the bus A phase angle, usb is the bus B phase voltage effective value, and Φsb is the bus B phase angle; usc is the effective value of the bus C-phase voltage, and Φsc is the phase angle of the bus C-phase;
D. the server 5 sequentially stores the received n one-dimensional arrays according to the receiving time to form an array Ps [ n ] [8] = { Tsn, fsn, usan, Φsan, usbn, Φsbn, uscn and Φscn }, wherein Tsn is the nth voltage acquisition time, fsn is the bus voltage frequency corresponding to the nth voltage acquisition time, usan is the bus A phase voltage effective value corresponding to the nth voltage acquisition time, Φsan is the bus A phase angle corresponding to the nth voltage acquisition time, usbn is the bus B phase voltage effective value corresponding to the nth voltage acquisition time, and Φsbn is the bus B phase angle corresponding to the nth voltage acquisition time; uscn is the effective value of the C-phase voltage of the bus corresponding to the nth voltage acquisition time, and phi scn is the phase angle of the C-phase of the bus corresponding to the nth voltage acquisition time;
E. the second singlechip 42 calculates effective values, frequency ft and phase angles of voltages of each phase of the branch 3 according to the received three-phase voltage cycle waveforms of the branch 3, and forms a one-dimensional array Pt [8] = { Tt, ft, ut1, phi t1, ut2, phi t2, ut3 and phi t3} with corresponding voltage acquisition time Tt as measurement data to be stored locally, wherein Tt is the voltage acquisition time, ft is the branch voltage frequency, us1 is the branch first-phase voltage effective value, phi s1 is the branch first-phase angle, us2 is the branch second-phase voltage effective value, and phi s2 is the branch second-phase angle; us3 is the third phase voltage effective value of the branch, Φs3 is the third phase angle of the branch;
F. the second singlechip 42 obtains, from the server 5, reference data corresponding to the same voltage acquisition time (i.e. tt=tsm), and compares the measured data with the reference data, specifically:
f1, when the phase angle difference of A, B, C three-phase voltages in the reference data is within the range of 120 degrees+/-epsilon, indicating that the phase voltage acquisition of the bus 1 is normal, and entering a step F2, wherein epsilon is the allowable deviation value of the phase voltage phase difference caused by the neutral point deviation of the three-phase alternating voltage, and the value is epsilon=5 degrees;
f2, judging whether ft=fsm is met, if yes, indicating that the branch line 3 and the bus 1 belong to the same alternating current synchronous power grid, and entering a step F3;
f3, judging whether delta phi=arccos [ cos (phi ti-phi sjm +theta) ]isless than or equal to delta, if yes, determining that the phase sequence name of the branch line 3 corresponding to phi ti is the same as the phase sequence name of the bus 1 corresponding to phi sjm at the moment, and outputting the determined phase sequence name, otherwise, outputting phase sequence unsynchronized information, wherein m=1, 2, …, n, i=1, 2,3, j=a, b, c, and theta are phase difference compensation values caused by the difference of wiring groups of voltage conversion equipment (such as a transformer and a transformer) between the voltage acquisition point of the bus 1 and the voltage acquisition point of the branch line 3, and the value of delta is determined by the errors of the reference measurement device 2 and the measurement terminal 3, the errors of the voltage conversion equipment, and the line length between the voltage acquisition point of the bus 1 and the voltage acquisition point of the branch line 3.
The foregoing description is only illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, i.e., the invention is not to be limited to the details of the claims and the description, but rather is to cover all modifications which are within the scope of the invention.
Claims (7)
1. An absolute phase sequence measurement system, characterized by: comprises a reference measuring device for acquiring bus phase voltage data and bus phase sequence names of a transformer substation, a measuring terminal for acquiring branch phase voltage data in a power supply range of the transformer substation, and a server which is in communication connection with the reference measuring device and used for storing the bus phase voltage data and the bus phase sequence names, wherein the measuring terminal is connected with the server through a wireless communication network and used for acquiring the bus phase voltage data and the bus phase sequence names from the server and determining the phase sequence names of the branch phases according to the branch phase voltage data, the bus phase voltage data and the bus phase sequence names, the reference measurement device comprises a first voltage acquisition module, a first singlechip, a first GPS clock module and a communication module, wherein the first voltage acquisition module is used for acquiring phase voltages of buses, the first singlechip is connected with the first voltage acquisition module, the first GPS clock module is respectively connected with the first singlechip, the first GPS clock module sends a 1PPS pulse signal to the first voltage acquisition module at each specific UTC time point to serve as a trigger signal, the first voltage acquisition module is started according to the trigger signal to continuously acquire phase voltage cycle waveforms of a plurality of buses, the first singlechip calculates effective values, frequencies and phase angles of each phase voltage of the buses according to the acquired phase voltage cycle waveforms, takes each voltage acquisition time and calculation result as bus phase voltage data, and uploads the bus phase voltage data to the server through the communication module;
the absolute phase sequence measurement method comprises the following steps:
A. determining the phase sequence names of all phases of the bus according to the phase sequence of the main equipment of the transformer substation or the phase color identification plates of all phases of the bus;
B. when each specific UTC time point arrives, the first voltage acquisition module continuously acquires the phase voltage cycle waveforms of the bus, and when a specific UTC time point arrives, the second voltage acquisition module continuously acquires the phase voltage cycle waveforms of the branch line;
C. according to the collected busbar phase voltage cycle waveform, calculating the effective value, frequency fs and phase angle of each busbar phase voltage, combining the calculation result and the corresponding voltage collection time Ts with the phase sequence names of each busbar phase to form a one-dimensional array Ps [8] = { Ts, fs, usa, Φsa, usb, Φsb, usc and Φsc } as reference data to be uploaded to a server, wherein Ts is the voltage collection time, fs is the busbar voltage frequency, usa is the effective value of busbar A phase voltage, Φsa is the busbar A phase angle, usb is the effective value of busbar B phase voltage, and Φsb is the busbar B phase angle; usc is the effective value of the bus C-phase voltage, and Φsc is the phase angle of the bus C-phase;
D. the method comprises the steps that a server sequentially stores n one-dimensional arrays according to receiving time to form an array Ps [ n ] [8] = { Tsn, fsn, usan, Φsan, usbn, Φsbn, uscn and Φscn }, wherein Tsn is an nth voltage acquisition time, fsn is bus voltage frequency corresponding to the nth voltage acquisition time, usan is bus A phase voltage effective value corresponding to the nth voltage acquisition time, Φsan is bus A phase angle corresponding to the nth voltage acquisition time, usbn is bus B phase voltage effective value corresponding to the nth voltage acquisition time, and Φsbn is bus B phase angle corresponding to the nth voltage acquisition time; uscn is the effective value of the C-phase voltage of the bus corresponding to the nth voltage acquisition time, and phi scn is the phase angle of the C-phase of the bus corresponding to the nth voltage acquisition time;
E. calculating effective values, frequency ft and phase angles of each phase voltage of the branch line according to the acquired branch line phase voltage cycle waveforms, and forming a one-dimensional array Pt [8] = { Tt, ft, ut1, phi t1, ut2, phi t2, ut3 and phi t3} by using settlement results and corresponding voltage acquisition moments Tt as measurement data to be stored locally, wherein Tt is the voltage acquisition moment, ft is the branch line voltage frequency, us1 is the branch line first phase voltage effective value, phi s1 is the branch line first phase angle, us2 is the branch line second phase voltage effective value and phi s2 is the branch line second phase angle; us3 is the third phase voltage effective value of the branch, Φs3 is the third phase angle of the branch;
F. obtaining corresponding reference data from the server when the voltage acquisition time is the same, and comparing the measured data with the reference data, specifically:
f1, when the phase angle difference of A, B, C three-phase voltages in the reference data is within the range of 120 degrees+/-epsilon, indicating that the busbar phase voltage is normally collected, and entering a step F2, wherein epsilon is the allowable deviation value of the phase voltage phase difference caused by the neutral point deviation of the three-phase alternating voltage, and the value range is epsilon less than or equal to 15 degrees;
f2, judging whether ft=fsm is met, if yes, indicating that the branch line and the bus belong to the same alternating current synchronous power grid, and entering a step F3;
f3, judging whether delta phi=arccos [ cos (phi ti-phi sjm +theta) ]isless than or equal to delta, if yes, determining that the phase sequence name of the branch line 3 corresponding to phi ti is the same as the phase sequence name of the bus 1 corresponding to phi sjm at the moment, and outputting the determined phase sequence name, otherwise, outputting phase sequence unsynchronized information, wherein m=1, 2, …, n, i=1, 2,3, j=a, b, c, and theta are phase difference compensation values caused by the difference of wiring groups of the voltage conversion equipment between the bus voltage acquisition point and the branch line acquisition point, and the value of delta is determined by the errors of the reference measurement device and the measurement terminal, the errors of the voltage conversion equipment, and the line length between the bus voltage acquisition point and the branch line voltage acquisition point.
2. An absolute phase sequence measurement system according to claim 1, wherein: the measuring terminal comprises a second voltage acquisition module for acquiring the branch line phase voltage, a second singlechip connected with the second voltage acquisition module, a second GPS clock module and a wireless communication module, wherein the second GPS clock module is respectively connected with the second singlechip, the second GPS clock module sends a 1PPS pulse signal to the second voltage acquisition module at a specific UTC time point to serve as a trigger signal, the second voltage acquisition module is started according to the trigger signal to continuously acquire phase voltage cycle waveforms of a plurality of branch lines, the second singlechip calculates effective values, frequencies and phase angles of the phase voltages of the branch lines according to the acquired phase voltage cycle waveforms, the voltage acquisition time and calculation results are stored locally as branch line phase voltage data, and the bus phase voltage data and the voltage effective values, frequencies and phase angles in the branch line phase voltage data are respectively checked through the wireless communication module to determine the phase sequence names of the phases of the branch lines.
3. An absolute phase sequence measurement system according to claim 2, wherein: the first voltage acquisition module comprises three voltage acquisition sensing elements and corresponding acquisition circuits, and can acquire the three-phase voltage of the bus at the same time; the second voltage acquisition module comprises three voltage acquisition sensing elements and corresponding acquisition circuits, and can acquire the branch three-phase voltage at the same time.
4. An absolute phase sequence measurement system according to claim 1 or 2 or 3, characterized in that: the specific UTC time point is UTC time integer seconds or UTC time integer fractions.
5. An absolute phase sequence measurement system according to claim 1 or 2 or 3, characterized in that: the first GPS clock module comprises a first GPS module and a first crystal oscillator clock connected with the first GPS module, and the precision of the first crystal oscillator clock is less than or equal to +/-5 ppm.
6. An absolute phase sequence measurement system according to claim 2 or 3, characterized in that: the second GPS clock module comprises a second GPS module and a second crystal oscillator clock connected with the second GPS module, and the precision of the second crystal oscillator clock is less than or equal to +/-5 ppm.
7. An absolute phase sequence measurement system according to claim 2 or 3, characterized in that: the names of the phase sequences of the buses are obtained according to the phase sequences of main equipment of the transformer substation or the phase color identification plates of the phases of the buses, and the main equipment of the transformer substation comprises a transformer or a mutual inductor.
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| CN112798878A (en) * | 2021-02-25 | 2021-05-14 | 山东科汇电力自动化股份有限公司 | Line transposition automatic phase sequence identification method based on voltage synchronous comparison |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103823111A (en) * | 2013-12-03 | 2014-05-28 | 国家电网公司 | Remote network unified phase color identification system |
| WO2014131074A1 (en) * | 2013-02-28 | 2014-09-04 | Locamate Pty Ltd | System and method for determining a user device location |
| CN104092738A (en) * | 2014-06-25 | 2014-10-08 | 国网福建南安市供电有限公司 | Long-distance nuclear phase system and method based on wireless Internet |
| US8970204B1 (en) * | 2013-01-15 | 2015-03-03 | Walter S. Bierer | Long range phasing voltmeter |
| CN105301437A (en) * | 2015-09-18 | 2016-02-03 | 江苏省电力公司常州供电公司 | GPS synchronous time service-based substation transformer secondary polarity detection method |
| CN206292310U (en) * | 2016-12-20 | 2017-06-30 | 王成楷 | A kind of absolute phase sequence measuring system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9733335B2 (en) * | 2014-11-13 | 2017-08-15 | Symbol Technologies, Llc | RFID tag locationing using dynamic beacon tag association |
-
2016
- 2016-12-20 CN CN201611186191.0A patent/CN107015073B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8970204B1 (en) * | 2013-01-15 | 2015-03-03 | Walter S. Bierer | Long range phasing voltmeter |
| WO2014131074A1 (en) * | 2013-02-28 | 2014-09-04 | Locamate Pty Ltd | System and method for determining a user device location |
| CN103823111A (en) * | 2013-12-03 | 2014-05-28 | 国家电网公司 | Remote network unified phase color identification system |
| CN104092738A (en) * | 2014-06-25 | 2014-10-08 | 国网福建南安市供电有限公司 | Long-distance nuclear phase system and method based on wireless Internet |
| CN105301437A (en) * | 2015-09-18 | 2016-02-03 | 江苏省电力公司常州供电公司 | GPS synchronous time service-based substation transformer secondary polarity detection method |
| CN206292310U (en) * | 2016-12-20 | 2017-06-30 | 王成楷 | A kind of absolute phase sequence measuring system |
Non-Patent Citations (1)
| Title |
|---|
| 张春 ; 莫霄雁 ; 金向东 ; .三相电力线网络远程核相系统(下).电子技术.2006,(第06期),第51-54页. * |
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