CN110161326A - A kind of more network live nuclear-phase methods and system at a distance - Google Patents
A kind of more network live nuclear-phase methods and system at a distance Download PDFInfo
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- CN110161326A CN110161326A CN201910342438.0A CN201910342438A CN110161326A CN 110161326 A CN110161326 A CN 110161326A CN 201910342438 A CN201910342438 A CN 201910342438A CN 110161326 A CN110161326 A CN 110161326A
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- 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
Abstract
The invention discloses a kind of remote more network live nuclear-phase methods and systems, and for the nuclear phase of multiple power grids, kernel phase system includes signal transmitter and wave tracer.Nuclear-phase method includes: the voltage signal that the current signal sent using the current transformer that signal transmitter receives corresponding power grid and voltage transformer are sent, and passes to wave tracer after being converted；By wave tracer to drafting phase sequence waveform diagram after the current signal and the corresponding waveform progress time-labeling of voltage signal after conversion；The corresponding phase sequence waveform diagram of each power grid is analyzed, determines the phase sequence between multiple power grids.It can be seen that, nuclear-phase method provided by the invention, the nuclear phase of power grid is after carrying out time-labeling to received current signal and voltage signal, the phase sequence waveform diagram of drafting determines, and then the phase verification of multiple power grids of any position may be implemented, realize the phase verification of remote power grid, for this process without having a power failure, applicability is good.
Description
Technical field
The present invention relates to the grid-connected nuclear phase field of power grid more particularly to a kind of remote more network live nuclear-phase methods and it is
System.
Background technique
With the fast development of power grid, the power plants such as each large size electric field, small power station, photovoltaic are when being incorporated to major network operation, all
The phase of the phase and major network of carrying out power plant is checked, to guarantee to have common phase that can just be incorporated into the power networks, if phase
Difference, gently then may cause user side generator reversion, it is heavy then cause generation phase fault, generate serious consequence.
Physics nuclear-phase method is used in current nuclear-phase method, needs to have a power failure to corresponding transmission line of electricity, use will insulate
Mode carry out nuclear phase, the phase that this mode is only capable of checking out route both ends is consistent.Nuclear phase is being carried out using electrification nuclear phase instrument
When, the phase of verification is generally acknowledged that less than 30 degree or is same-phase less than 15 degree, other are non-same-phase, in this way
The distance of verification is smaller, and phase verification is realized usually in same substation.
But in current rural area distribution, local power network independent operating, connect in power grid multiple substations, and route
Longer, each substation connects multiple small power stations or photovoltaic station etc. simultaneously and is incorporated into the power networks.When carrying out nuclear phase work at this time, according to
Traditional nuclear phase mode carries out grid-connected nuclear phase work, and cable run is needed to be in all insulation, full-shield state, work process
Complexity, the working time that has a power failure extend, easily adversely affect to operation of power networks.
Summary of the invention
The present invention provides a kind of remote more network live nuclear-phase methods and system, with solve existing nuclear-phase method without
Method is suitable for remote situation, problem poor for applicability.
In a first aspect, the present invention provides a kind of remote more network live nuclear-phase methods, the method is applied to nuclear phase
System, each kernel phase system are connected with a power grid, and the power grid is equipped with multiple voltage transformers and multiple current transformers；
The kernel phase system includes wave tracer and several signal transmitters；One end of each signal transmitter respectively with waveform
Recorder connection, the other end of each signal transmitter respectively with the secondary singal of each voltage transformer of corresponding power grid
End is connected with the secondary singal end of each current transformer；It the described method comprises the following steps:
The current signal of corresponding power grid is sent to signal transmitter using each current transformer；
The voltage signal of corresponding power grid is sent to signal transmitter using each voltage transformer；
Conversion process is carried out to each corresponding current signal and voltage signal using the signal transmitter, and, it will
Current signal and voltage signal after conversion are sent to wave tracer；
Time mark is carried out using the corresponding waveform of current signal and voltage signal of the wave tracer to corresponding power grid
Note；
According to the current signal and voltage signal after time-labeling, the corresponding phase sequence waveform diagram of each power grid is drawn；
The phase sequence waveform diagram corresponding to each power grid is analyzed, and determines the phase sequence between multiple power grids.
Optionally, described that the corresponding phase sequence waveform diagram of each power grid is analyzed, determine the phase between multiple power grids
The process of sequence, comprising:
According to the corresponding phase sequence waveform diagram of each power grid, the collective reference time between each wave tracer is determined
Starting point；
According to the collective reference start time, the waveform including at least two periods of each wave tracer is chosen
Figure；
According to the current data and voltage data in each waveform diagram, the current data and voltage data are judged
Whether phase sequence is consistent；
When the current data is consistent with the phase sequence of voltage data, determine electric in the corresponding wave tracer of each power grid
Press the phase difference between data；
If the phase difference is less than preset threshold, determine that the phase sequence between multiple power grids is identical.
Optionally, described according to the corresponding phase sequence waveform diagram of each power grid, it determines common between each wave tracer
The process of zero-time, comprising:
Determine the time range of the waveform recording of the corresponding phase sequence waveform diagram of each power grid；
If there are intersections between the time range of each waveform recording, by any one in the intersection corresponding period
Time point is as the collective reference start time between corresponding multiple wave tracers.
Optionally, described when current data is consistent with the phase sequence of voltage data, determine the corresponding waveform note of each power grid
Record the process of the phase difference in instrument between voltage data, comprising:
In the corresponding waveform diagram of each power grid, the first time zero passage point moment of each waveform diagram is determined；
According to the first time zero passage point moment of multiple waveform diagrams, time difference △ t is determined；
According to the time difference △ t and formula ψ=360* △ t/0.02, the corresponding wave tracer of each power grid is determined
Phase difference between middle voltage data.
Second aspect, the present invention also provides a kind of remote more network live kernel phase systems, each kernel phase systems
It is connected with a power grid, the power grid is equipped with multiple voltage transformers and multiple current transformers；The kernel phase system includes
Wave tracer and several signal transmitters；One end of each signal transmitter is connect with wave tracer respectively, each
The other end of the signal transmitter is mutual with the secondary singal end of each voltage transformer of corresponding power grid and each electric current respectively
The secondary singal end of sensor connects；Wherein,
The signal transmitter is used to receive the current signal and voltage transformer of the correspondence power grid of current transformer transmission
The voltage signal of the correspondence power grid of transmission；And for carrying out conversion process to each corresponding current signal and voltage signal,
And by after conversion current signal and voltage signal be sent to wave tracer；
The wave tracer is used to carry out time mark to the corresponding waveform of the current signal and voltage signal of corresponding power grid
Note；And according to the current signal and voltage signal after time-labeling, draw the corresponding phase sequence waveform diagram of each power grid；
And the corresponding phase sequence waveform diagram of each power grid is analyzed, determine the phase sequence between multiple power grids.
Optionally, the wave tracer includes GPS clock processing unit and signal processing unit；
The GPS clock processing unit is used to determine each waveform according to the corresponding phase sequence waveform diagram of each power grid
Collective reference start time between recorder；And according to the collective reference start time, choose each wave tracer
The waveform diagram including at least two periods；
The signal processing unit is used for according to the current data and voltage data in each waveform diagram, described in judgement
Whether current data is consistent with the phase sequence of voltage data；And when the current data is consistent with the phase sequence of voltage data, really
Determine the phase difference in the corresponding wave tracer of each power grid between voltage data；And it is less than default threshold in the phase difference
In the case where value, determine that the phase sequence between multiple power grids is identical.
Optionally, the GPS clock processing unit is also used to determine the waveform note of the corresponding phase sequence waveform diagram of each power grid
The time range of record；And there are in the case where intersection between the time range of each waveform recording, when intersection is corresponding
Between any one time point in section as the collective reference start time between corresponding multiple wave tracers.
Optionally, the signal processing unit is also used in the corresponding waveform diagram of each power grid, determines each wave
The first time zero passage point moment of shape figure；And the first time zero passage point moment according to multiple waveform diagrams, determine time difference △ t；With
And according to the time difference △ t and formula ψ=360* △ t/0.02, determine voltage in the corresponding wave tracer of each power grid
Phase difference between data.
From the above technical scheme, a kind of remote more network live nuclear-phase methods provided in an embodiment of the present invention and it is
System, for the nuclear phase of multiple power grids, each kernel phase system is connected with a power grid, the one of each signal transmitter in kernel phase system
End connect respectively with wave tracer, the other end of each signal transmitter respectively with each voltage transformer of corresponding power grid
Secondary singal end is connected with the secondary singal end of each current transformer.Nuclear-phase method includes: to utilize signal transmitter reception pair
The voltage signal that the current signal and voltage transformer for answering the current transformer of power grid to send are sent, and passed to after being converted
Wave tracer；By wave tracer to after conversion current signal and the corresponding waveform of voltage signal carry out time-labeling after draw
Phase sequence waveform diagram processed；The corresponding phase sequence waveform diagram of each power grid is analyzed, determines the phase sequence between multiple power grids.It can
To see, nuclear-phase method provided by the invention, the nuclear phase of power grid is after carrying out time-labeling to received current signal and voltage signal,
The phase sequence waveform diagram of drafting determines, and then the phase verification of multiple power grids of any position may be implemented, that is, realizes remote
Power grid phase verification, for this process without having a power failure, applicability is good.
Detailed description of the invention
In order to illustrate more clearly of technical solution of the present invention, letter will be made to attached drawing needed in the embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without any creative labor,
It is also possible to obtain other drawings based on these drawings.
Fig. 1 is the flow chart of remote more network live nuclear-phase methods provided in an embodiment of the present invention；
Fig. 2 is the structural schematic diagram of kernel phase system provided in an embodiment of the present invention；
Fig. 3 (a) is the inconsistent waveform diagram of Liang Ge substation a phase sequence provided in an embodiment of the present invention；
Fig. 3 (b) is the inconsistent waveform diagram of Liang Ge substation b phase sequence provided in an embodiment of the present invention；
Fig. 3 (c) is the inconsistent waveform diagram of Liang Ge substation c phase sequence provided in an embodiment of the present invention；
Fig. 4 (a) is the consistent waveform diagram of Liang Ge substation a phase sequence provided in an embodiment of the present invention；
Fig. 4 (b) is the consistent waveform diagram of Liang Ge substation b phase sequence provided in an embodiment of the present invention；
Fig. 4 (c) is the consistent waveform diagram of Liang Ge substation c phase sequence provided in an embodiment of the present invention.
Specific embodiment
Fig. 1 is the flow chart of remote more network live nuclear-phase methods provided in an embodiment of the present invention.
Referring to Fig. 1, a kind of remote more network live nuclear-phase methods provided in an embodiment of the present invention, the method is applied to
Kernel phase system, each kernel phase system are connected with a power grid, and power grid is equipped with multiple voltage transformers 2 and multiple current transformers
3.As shown in Fig. 2, power grid (1) connects a kernel phase system, power grid so that remote power grid adjacent to two carries out nuclear phase as an example
(2) another kernel phase system is connected.Kernel phase system includes wave tracer 1 and several signal transmitters 6；Each signal transmitter
6 one end is connect with wave tracer 1 respectively, the other end of each signal transmitter 6 respectively with each voltage of corresponding power grid
The secondary singal end of mutual inductor 2 is connected with the secondary singal end of each current transformer 3.
Specifically, current transformer 3 is arranged on the equipment bus 4 of corresponding power grid, and the difference of each equipment bus 4 is opposite
One current transformer 3 should be set, A1, B1, C1 in power grid as shown in Figure 2 (1), A2, B2, C2 in power grid (2).Every
Test connecting line 5 is connected on different equipment buses 4, and voltage transformer 2 is arranged on test connecting line 5, as shown in Figure 2
Power grid (1) in VA1, VB1, VC1, VA2, VB2, VC2 in power grid (2), i.e., in test connecting line 5 and equipment component bus
Voltage transformer 2 and current transformer 3 are in series on 4.Wave tracer 1 is connected by test connecting line 5 and signal transmitter 6
It connecing, wave tracer 1 and signal transmitter 6 are connect by testing connecting line 5 with voltage transformer 2 and current transformer 3 respectively,
Each signal transmitter 6 is used to receive the voltage signal of corresponding voltage transformer 2, while receiving corresponding current transformer 3
Current signal.
When kernel phase system is applied in the environment of remote more power grids, nuclear-phase method the following steps are included:
S 1, the current signal of corresponding power grid is sent to signal transmitter using each current transformer；
S2, the voltage signal of corresponding power grid is sent to signal transmitter using each voltage transformer；
In more power grid environments, as shown in Fig. 2, two power grids are apart from each other, it is mutual that multiple electric currents can be set on equipment bus 4
Sensor 3, meanwhile, it can correspond to and multiple voltage transformers 2 are set on test connecting line 5.In application, in different power grids, root
According to the range of current transformer 3 and the range of voltage transformer 2, suitable signal transmitter 6 is chosen, will pass through signal transmission
Device 6 can be accurately received the current signal of current transformer 3 and the voltage signal of voltage transformer 2.
The three-phase current signal of power grid is sent to signal transmitter 6 by each current transformer 3, meanwhile, each voltage is mutual
The three-phase voltage signal of power grid is sent to signal transmitter 6 by sensor 3, so that signal transmitter 6 believes current signal and voltage
Number the input requirements for meeting wave tracer 1 are converted to, to carry out efficient nuclear phase process.
In the present embodiment, 1:1 converter and 1:10 converter is can be used in signal transmitter 6.Wherein, 1:1 converter refers to survey
The voltage or current signal of amount do not reduce, and 1:10 converter refers to that the voltage of measurement or current signal reduce 10 times, in order to number
According to processing.
S3, conversion process is carried out to each corresponding current signal and voltage signal using signal transmitter, and, it will turn
Current signal and voltage signal after changing are sent to wave tracer；
Signal transmitter 6 carries out conversion process to the voltage signal current signal that receives, i.e., signal is amplified or
It reduces, so that treated voltage signal and current signal can satisfy the input requirements of wave tracer 1, by waveform recording
To treated, voltage signal current signal carries out nuclear phase processing to instrument 1.
S4, time mark is carried out using the corresponding waveform of current signal and voltage signal of the wave tracer to corresponding power grid
Note；
S5, according to the current signal and voltage signal after time-labeling, draw the corresponding phase sequence waveform of each power grid
Figure；
6N data channel is included at least in wave tracer 1,6N group data can be handled simultaneously, to improve nuclear phase
The utilization rate of system improves nuclear phase efficiency.
Specifically, wave tracer 1 includes GPS clock processing unit 7 and signal processing unit；GPS clock processing unit 7
For carrying out time-labeling processing to current signal and the corresponding waveform of voltage signal, signal processing unit according to electric current for believing
Number and voltage signal draw phase sequence waveform diagram.
Wave tracer 1 has GPS time adjustment function, corresponding to current signal and voltage signal by GPS clock processing unit 7
Waveform carry out time-labeling, i.e., current signal and voltage signal are synchronized, in order to it is subsequent draw map accuracy.
After time-labeling, by the current signal and voltage signal drafting phase sequence wave after signal processing unit time-labeling
Shape figure.Wherein, the corresponding phase sequence waveform diagram of each power grid.
S6, the corresponding phase sequence waveform diagram of each power grid is analyzed, determines the phase sequence between multiple power grids.
The corresponding phase sequence waveform diagram of different power grids is analyzed, determines the phase sequence of two neighboring power grid, it can be true
It protects when carrying out nuclear phase, power station does not have a power failure, to guarantee the stable operation of power grid.
Specifically, in the present embodiment, each phase sequence waveform diagram is analyzed, determines the phase sequence between multiple power grids
Process, comprising:
S61, according to the corresponding phase sequence waveform diagram of each power grid, determine the collective reference time between each wave tracer
Starting point；
The corresponding phase sequence waveform diagram of each power grid is handled, for the phase sequence convenient for judging adjacent multiple power grids,
The present embodiment is chosen at the waveform diagram in same time period and compares, to improve the accuracy of judging phase order.
Collective reference start time refers to the common time starting point of two waveform times, in the present embodiment, according to phase sequence wave
Shape figure determines the process of the collective reference time between the corresponding each wave tracer 1 of each power grid, comprising:
S611, determine the corresponding phase sequence waveform diagram of each power grid waveform recording time range；
If S612, each waveform recording time range between there are intersection, by appointing in the intersection corresponding period
A time point anticipate as the collective reference start time between corresponding multiple wave tracers.
In multiple phase sequence waveform diagrams of drafting, the time range of the waveform in each phase sequence waveform diagram is chosen.If carrying out
There are intersections between the corresponding time range of multiple power grids of nuclear phase, then the intersection is common reference time section, and at this
Any one time point in reference time section can be used as from the collective reference time between corresponding multiple wave tracers 1
Point.For example, any time point in the common reference time section can be used as this if carrying out nuclear phase processing to two power grids
Collective reference start time between the corresponding wave tracer of two power grids, i.e. between two wave tracers；If to three
Power grid carries out nuclear phase processing, then any time point in the common reference time section can be used as the corresponding wave of three power grids
Collective reference start time between shape recorder, i.e. between three wave tracers.
For example, the time range for the corresponding waveform recording of phase sequence waveform diagram that first power grid generates is 17:19:
11.38784054 arriving 17:19:13.38784054；The time for the corresponding waveform recording of phase sequence waveform diagram that second power grid generates
Range is 17:18:38.79069306 to 17:19:12.79069306, then when the corresponding common reference of two phase sequence waveform diagrams
Between section be 17:19:11.38784054 to 17:19:12.79069306, in 17:19:11.38784054 to 17:19:
Any one time point in 12.79069306 can be from the collective reference time between the corresponding wave tracer of two power grids
Point.
S62, according to collective reference start time, choose the waveform including at least two periods of each wave tracer
Figure；
S63, according to the current data and voltage data in each waveform diagram, judge the phase sequence of current data and voltage data
It is whether consistent；
Using collective reference start time as initial point, choose from at least two of each 1 start recording of wave tracer
The waveform in period shows current data and voltage data in the waveform.
According to the current data and voltage data of each phase sequence waveform diagram of above-mentioned determination, each wave tracer 1 is determined
The phase sequence of middle electric current and voltage judges whether the electric current inside corresponding power grid is consistent with the phase sequence of voltage.If
Electric current is consistent with the phase sequence of voltage, then test data is correct, otherwise should test Develop Data again.
For example, the phase sequence of electric current is A, B, C in power grid (1), the phase sequence of voltage is A, B, C in power grid (1),
Then illustrate that the current data in power grid (1) is consistent with the phase sequence of voltage data.
Judge whether current data is consistent with the phase sequence of voltage data, can occur to avoid the phenomenon that misconnection equipment, to mention
The accuracy of high nuclear phase.
S64, when current data is consistent with the phase sequence of voltage data, determine in the corresponding wave tracer of each power grid electric
Press the phase difference between data；
When judging the phase sequence of multiple power grids, the phase difference generated according to multiple power grids is needed to be judged, and then every
When the electric current of a power grid is consistent with voltage phase sequence, the phase in the corresponding wave tracer 1 of each power grid between voltage data is determined
Potential difference.
In the present embodiment, the current data inside same power grid is consistent with the phase sequence of voltage data with the following method
When, determine the phase difference in the corresponding wave tracer of multiple power grids between voltage data:
S641, in the corresponding waveform diagram of each power grid, determine the first time zero passage point moment of each waveform diagram；
S642, the first time zero passage point moment according to multiple waveform diagrams, determine time difference △ t；
S643, according to time difference △ t and formula ψ=360* △ t/0.02, determine the corresponding wave tracer of each power grid
Phase difference between middle voltage data.
For carrying out nuclear phase to two power grids, it is first determined go out the first time zero crossing of power grid (1) corresponding waveform diagram
Moment Tn1, meanwhile, determine the first time zero passage point moment TN of the corresponding waveform diagram of power grid (2)2, then calculate two waveform diagrams
Time difference △ t, i.e., according to formula △ t=Tn1-TN2, determine time difference △ t.
Finally, according to formula ψ=360* △ t/0.02, determine in the corresponding wave tracer of two power grids voltage data it
Between phase difference.
If S65, phase difference are less than preset threshold, determine that the phase sequence between multiple power grids is identical.
After calculating the phase difference between the corresponding voltage data of each power grid, it is default to judge whether phase difference is less than
Threshold value, in the present embodiment, preset threshold may be set to 10 degree.If phase difference is less than 10 degree, it is determined that between multiple power grids
Phase sequence is same phase, if it is greater than or equal to 10 degree, it is determined that the phase sequence between multiple power grids is different phases.
From the above technical scheme, a kind of remote more network live nuclear-phase methods provided in an embodiment of the present invention, are answered
For kernel phase system, for the nuclear phase of multiple power grids, each kernel phase system is connected with a power grid, each signal in kernel phase system
One end of conveyer 6 is connect with wave tracer 1 respectively, and the other end of each signal transmitter 6 is every with corresponding power grid respectively
The secondary singal end of a voltage transformer 2 is connected with the secondary singal end of each current transformer 3.Nuclear-phase method includes: to utilize
The voltage letter that the current signal and voltage transformer 2 that the current transformer 3 that signal transmitter 6 receives corresponding power grid is sent are sent
Number, and wave tracer 1 is passed to after being converted；By the current signal and voltage signal pair after 1 pair of wave tracer conversion
The waveform answered draws phase sequence waveform diagram after carrying out time-labeling；The corresponding phase sequence waveform diagram of each power grid is analyzed, is determined
Phase sequence between multiple power grids.As it can be seen that nuclear-phase method provided by the invention, the nuclear phase of power grid is to received current signal
After carrying out time-labeling with voltage signal, the phase sequence waveform diagram of drafting is determined, and then multiple electricity of any position may be implemented
The phase of net is checked, that is, realizes the phase verification of remote power grid, for this process without having a power failure, applicability is good.
The beneficial effect that can be obtained in order to better illustrate the present invention, is illustrated using following specific embodiments.
For example, the phase sequence of Fengqing substation and Ya Lian substation need to be checked.
S 1, it is sent by the corresponding each current transformer 3 of signal transmitter reception Fengqing substation in the substation of Fengqing
Current signal and the voltage signal that sends of each voltage transformer 2, and, signal transmitter in You Yalian substation receives
The voltage signal that the current signal and each voltage transformer 2 that the corresponding each current transformer 3 of Ya Lian substation is sent are sent.
The voltage signal received and current signal are converted and sent by the signal transmitter in S2, Fengqing substation
To corresponding wave tracer, the signal transmitter in Ya Lian substation is turned the voltage signal received and current signal
It changes and is sent to corresponding wave tracer；
S3, by the voltage signal and the corresponding waveform of current signal after 1 pair of wave tracer in the substation of Fengqing conversion
Time-labeling is carried out, the corresponding phase sequence waveform diagram of Fengqing substation is drawn；By 1 pair of wave tracer conversion in Ya Lian substation
The corresponding waveform of voltage signal and current signal afterwards carries out time-labeling, draws the corresponding phase sequence waveform diagram of Ya Lian substation.
S4, the phase sequence waveform diagram of Fengqing substation and Ya Lian substation is analyzed, determines that Fengqing substation and Asia practice
Phase sequence between substation.
When carrying out nuclear phase, the phase of voltage data is indicated by waveform diagram, and only choosing includes two in phase sequence waveform diagram
The waveform in period.
As shown in Fig. 3 (a), the voltage a phase waveform of Fengqing substation and the voltage a phase waveform of Ya Lian substation are shown；Such as
Shown in Fig. 3 (b), the voltage b phase waveform of Fengqing substation and the voltage b phase waveform of Ya Lian substation are shown；As shown in Fig. 3 (c),
The voltage c phase waveform of Fengqing substation and the voltage c phase waveform of Ya Lian substation are shown.
As can be seen from Figure, a phase of Liang Ge substation is not overlapped, and b phase is not overlapped, and c phase is not overlapped, two changes
The phase difference difference in power station is larger, is greater than 10 degree, hence, it can be determined that the phase sequence of the Liang Ge substation is inconsistent.
As shown in Fig. 4 (a), the voltage a phase waveform of Fengqing substation and the voltage a phase waveform of Ya Lian substation are shown；Such as
Shown in Fig. 4 (b), the voltage b phase waveform of Fengqing substation and the voltage b phase waveform of Ya Lian substation are shown；As shown in Fig. 4 (c),
The voltage c phase waveform of Fengqing substation and the voltage c phase waveform of Ya Lian substation are shown.
As can be seen from Figure, a of Liang Ge substation coincides, and b coincides, and c coincides, the phase difference of Liang Ge substation
Differ smaller, less than 10 degree, hence, it can be determined that the phase sequence of the Liang Ge substation is consistent.
As shown in Fig. 2, a kind of remote more network live kernel phase systems provided in an embodiment of the present invention, for realizing Fig. 1
Shown in remote more network live nuclear-phase methods, each kernel phase system is connected with a power grid, and the power grid is equipped with
Multiple voltage transformers and multiple current transformers；The kernel phase system includes wave tracer 1 and several signal transmitters 6；
One end of each signal transmitter 6 is connect with wave tracer 1 respectively, the other end point of each signal transmitter 6
It is not connected with the secondary singal end of each voltage transformer 2 of corresponding power grid and the secondary singal end of each current transformer 3；Its
In,
The signal transmitter 6 is used to receive the current signal and mutual induction of voltage of the correspondence power grid of the transmission of current transformer 3
The voltage signal for the correspondence power grid that device 2 is sent；And for being carried out at conversion to each corresponding current signal and voltage signal
Reason, and by after conversion current signal and voltage signal be sent to wave tracer 1；
The wave tracer 1 is used to carry out time mark to the corresponding waveform of the current signal and voltage signal of corresponding power grid
Note；And according to the current signal and voltage signal after time-labeling, draw the corresponding phase sequence waveform diagram of each power grid；
And the corresponding phase sequence waveform diagram of each power grid is analyzed, determine the phase sequence between multiple power grids.
Optionally, the wave tracer 1 includes GPS clock processing unit 7 and signal processing unit；
The GPS clock processing unit 7 is used to determine each waveform according to the corresponding phase sequence waveform diagram of each power grid
Collective reference start time between recorder 1；And according to the collective reference start time, choose each waveform recording
The waveform diagram including at least two periods of instrument；
The signal processing unit is used for according to the current data and voltage data in each waveform diagram, described in judgement
Whether current data is consistent with the phase sequence of voltage data；And when the current data is consistent with the phase sequence of voltage data, really
Determine the phase difference in the corresponding wave tracer 1 of each power grid between voltage data；And it is less than default threshold in the phase difference
In the case where value, determine that the phase sequence between multiple power grids is identical.
Optionally, the GPS clock processing unit 7 is also used to determine the waveform note of the corresponding phase sequence waveform diagram of each power grid
The time range of record；And there are in the case where intersection between the time range of each waveform recording, when intersection is corresponding
Between any one time point in section as the collective reference start time between corresponding multiple wave tracers 1.
Optionally, the signal processing unit is also used in the corresponding waveform diagram of each power grid, determines each wave
The first time zero passage point moment of shape figure；And the first time zero passage point moment according to multiple waveform diagrams, determine time difference △ t；With
And according to the time difference △ t and formula ψ=360* △ t/0.02, determine electric in the corresponding wave tracer 1 of each power grid
Press the phase difference between data.
Those skilled in the art after considering the specification and implementing the invention disclosed here, will readily occur to of the invention its
Its embodiment.This application is intended to cover any variations, uses, or adaptations of the invention, these modifications, purposes or
Person's adaptive change follows general principle of the invention and including the undocumented common knowledge in the art of the present invention
Or conventional techniques.The description and examples are only to be considered as illustrative, and true scope and spirit of the invention are by appended
Claim is pointed out.
It should be understood that the present invention is not limited to the precise structure already described above and shown in the accompanying drawings, and
And various modifications and changes may be made without departing from the scope thereof.The scope of the present invention is limited only by the attached claims.
Same and similar part may refer to each other between each embodiment in this specification.Especially for remote more
For network live kernel phase system embodiment, since it is substantially similar to the method embodiment, so be described relatively simple, it is related
Place is referring to the explanation in embodiment of the method.
Claims (8)
1. a kind of remote more network live nuclear-phase methods, which is characterized in that the method is applied to kernel phase system, each nuclear phase
System is connected with a power grid, and the power grid is equipped with multiple voltage transformers and multiple current transformers；The kernel phase system
Including wave tracer and several signal transmitters；One end of each signal transmitter is connect with wave tracer respectively,
The other end of each signal transmitter respectively with the secondary singal end of each voltage transformer of corresponding power grid and each electricity
The secondary singal end of current transformer connects；It the described method comprises the following steps:
The current signal of corresponding power grid is sent to signal transmitter using each current transformer；
The voltage signal of corresponding power grid is sent to signal transmitter using each voltage transformer；
Conversion process is carried out to each corresponding current signal and voltage signal using the signal transmitter, and, it will convert
Current signal and voltage signal afterwards is sent to wave tracer；
Time-labeling is carried out using the corresponding waveform of current signal and voltage signal of the wave tracer to corresponding power grid；
According to the current signal and voltage signal after time-labeling, the corresponding phase sequence waveform diagram of each power grid is drawn；
The phase sequence waveform diagram corresponding to each power grid is analyzed, and determines the phase sequence between multiple power grids.
2. the method according to claim 1, wherein described divide the corresponding phase sequence waveform diagram of each power grid
Analysis, determines the process of the phase sequence between multiple power grids, comprising:
According to the corresponding phase sequence waveform diagram of each power grid, from determining the collective reference time between each wave tracer
Point；
According to the collective reference start time, the waveform diagram including at least two periods of each wave tracer is chosen；
According to the current data and voltage data in each waveform diagram, the phase sequence of the current data and voltage data is judged
It is whether consistent；
When the current data is consistent with the phase sequence of voltage data, voltage number in the corresponding wave tracer of each power grid is determined
Phase difference between；
If the phase difference is less than preset threshold, determine that the phase sequence between multiple power grids is identical.
3. according to the method described in claim 2, it is characterized in that, described according to the corresponding phase sequence waveform diagram of each power grid, really
The process of collective reference start time between fixed each wave tracer, comprising:
Determine the time range of the waveform recording of the corresponding phase sequence waveform diagram of each power grid；
If there are intersections between the time range of each waveform recording, by any one time in the intersection corresponding period
Point is as the collective reference start time between corresponding multiple wave tracers.
4. according to the method described in claim 2, it is characterized in that, described consistent with the phase sequence of voltage data in current data
When, determine the process of the phase difference in the corresponding wave tracer of each power grid between voltage data, comprising:
In the corresponding waveform diagram of each power grid, the first time zero passage point moment of each waveform diagram is determined；
According to the first time zero passage point moment of multiple waveform diagrams, time difference △ t is determined；
According to the time difference △ t and formula ψ=360* △ t/0.02, determine electric in the corresponding wave tracer of each power grid
Press the phase difference between data.
5. a kind of remote more network live kernel phase systems, which is characterized in that each kernel phase system is connected with a power grid,
The power grid is equipped with multiple voltage transformers and multiple current transformers；The kernel phase system includes wave tracer and several
Signal transmitter；One end of each signal transmitter is connect with wave tracer respectively, each signal transmitter
The other end respectively with the secondary singal end at the secondary singal end of each voltage transformer of corresponding power grid and each current transformer
Connection；Wherein,
The signal transmitter is used to receive the current signal of the correspondence power grid of current transformer transmission and voltage transformer is sent
Correspondence power grid voltage signal；And for carrying out conversion process to each corresponding current signal and voltage signal, and will
Current signal and voltage signal after conversion are sent to wave tracer；
The wave tracer is used to carry out time-labeling to the corresponding waveform of the current signal and voltage signal of corresponding power grid；With
And according to the current signal and voltage signal after time-labeling, draw the corresponding phase sequence waveform diagram of each power grid；And
The phase sequence waveform diagram corresponding to each power grid is analyzed, and determines the phase sequence between multiple power grids.
6. system according to claim 5, which is characterized in that the wave tracer include GPS clock processing unit and
Signal processing unit；
The GPS clock processing unit is used to determine each waveform recording according to the corresponding phase sequence waveform diagram of each power grid
Collective reference start time between instrument；And according to the collective reference start time, choose the packet of each wave tracer
Include the waveform diagram at least two periods；
The signal processing unit is used to judge the electric current according to the current data and voltage data in each waveform diagram
Whether data are consistent with the phase sequence of voltage data；And when the current data is consistent with the phase sequence of voltage data, determine every
Phase difference in the corresponding wave tracer of a power grid between voltage data；And it is less than preset threshold in the phase difference
In the case of, determine that the phase sequence between multiple power grids is identical.
7. system according to claim 6, which is characterized in that the GPS clock processing unit is also used to determine each electricity
Net the time range of the waveform recording of corresponding phase sequence waveform diagram；And exist between the time range of each waveform recording
In the case where intersection, using any one time point in the intersection corresponding period as between corresponding multiple wave tracers
Collective reference start time.
8. system according to claim 6, which is characterized in that the signal processing unit is also used to corresponding in each power grid
The waveform diagram in, determine the first time zero passage point moment of each waveform diagram；And the first time mistake according to multiple waveform diagrams
The zero point moment determines time difference △ t；And it according to the time difference △ t and formula ψ=360* △ t/0.02, determines each
Phase difference in the corresponding wave tracer of power grid between voltage data.
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| CN116683450A (en) * | 2023-07-21 | 2023-09-01 | 连云港海连送变电工程有限公司 | Intelligent power monitoring network directional phase sequence checking method and device |
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