CN108663603B - Distributed wave recording graphical analysis method, device, equipment and medium - Google Patents
Distributed wave recording graphical analysis method, device, equipment and medium Download PDFInfo
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- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/085—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution lines, e.g. overhead
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- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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Abstract
The invention discloses a distributed wave recording graphical analysis method, which comprises the following steps: synchronizing the distributed wave recording curves to be synchronized to obtain a synchronous wave recording curve; displaying a dynamic loop diagram according to the mapping relation between the synchronous wave recording curve and primary equipment of the direct-current power transmission system; and automatically positioning and displaying the fault on the dynamic loop diagram according to the protection principle. The method is used for realizing rapid positioning and solving of faults in a short time, so that the power restoration speed is improved, and the safe operation of a power grid is ensured.
Description
Technical Field
The invention relates to the field of power systems, in particular to a distributed wave recording graphical analysis method, a distributed wave recording graphical analysis device, equipment and a medium.
Background
Modern power systems are large and complex power generation, transmission and utilization systems. In the operation and production process of the system, tens to hundreds of generator sets operate every day in a medium-scale power grid, thousands of power transmission lines are connected with hundreds of substations with different voltage levels, and power sources are continuously transmitted to users.
The fault recording data is the main basis of fault analysis, can be applied to fault type judgment, fault distance measurement, protection behavior analysis, fault playback, equivalence verification in an accident state and the like, and is very important information in a fault information system. The analog channel sampling sequence in the fault recording data comprises electric quantities before and after the fault, and the electric quantities before the fault are utilized for matching and fusing fault recording files at two ends of the power transmission line; the failure phase determination, the failure distance measurement, and the like use the electrical quantities after the failure.
When a direct current transmission system breaks down, fault recording waves distributed in each device are transmitted to operators in a centralized mode, the recording waves of each device have different time lengths and sampling rates, the operators need to manually arrange and analyze numerous discrete information such as the fault recording waves, the faults cannot be quickly positioned and solved in a short time, and therefore power supply speed recovery and power grid safe operation are affected.
Disclosure of Invention
In view of the above problems, the present invention provides a distributed wave recording graphical analysis method, which can accurately implement wave recording curve synchronization.
In a first aspect, the present invention provides a distributed wave recording graphical analysis method, including:
synchronizing the distributed wave recording curves to be synchronized to obtain a synchronous wave recording curve;
displaying a dynamic loop diagram according to the mapping relation between the synchronous wave recording curve and primary equipment of the direct-current power transmission system;
automatically positioning and displaying faults on the dynamic loop diagram according to a protection principle; wherein the content of the first and second substances,
the displaying a dynamic loop diagram according to the mapping relationship between the synchronous recording curve and the primary equipment of the direct-current power transmission system comprises:
mapping the synchronous wave recording curve and primary equipment of the direct-current power transmission system to obtain a mapping line;
acquiring a preset time value;
performing interpolation of a preset time interval on the preset time value to obtain a detection time interval;
acquiring the electrical quantity of the mapping line within the detection time interval;
displaying, hiding or displaying the line in the dynamic loop diagram according to the electrical quantity, and identifying the fault in a graphical manner;
the automatic fault positioning display on the dynamic loop diagram according to the protection principle comprises the following steps:
acquiring a fault point on the dynamic loop diagram according to a protection principle;
automatically positioning and displaying the fault on the dynamic loop diagram according to the fault point;
the obtaining of the fault point on the dynamic loop diagram according to the protection principle includes:
when the current value is higher than a preset value, acquiring an overcurrent fault point;
when the total current of the same node or the generalized node is not zero, acquiring a region leakage current fault point;
when the voltage is higher than a preset value, acquiring an overvoltage fault point:
when the switch is disconnected and current exists, acquiring a switch failure point;
and when the switch is closed and the current is zero, and the current in the adjacent range is not zero, acquiring a switch malfunction fault point.
In a first possible implementation manner of the first aspect, the displaying, hiding, or displaying the line in the dynamic loop diagram and identifying the fault according to the electrical quantity includes:
when the current value is not 0 and the switch is closed, displaying the circuit;
when the current value is 0 and the switch is closed, the circuit is hidden;
when the current value is 0 and the switch is disconnected, the circuit is hidden;
when the current value is not 0 and the switch is off, the line is displayed and a fault is identified.
In a second possible implementation manner of the first aspect, the mapping the synchronous recording curve and the primary equipment of the dc power transmission system to obtain a mapping line includes:
when detecting that a wave recording curve representing the current or the voltage of the primary equipment of the direct current transmission system already exists, mapping the wave recording curve with the primary equipment of the direct current transmission system to obtain a mapping line.
In a third possible implementation manner of the first aspect, the mapping the synchronous recording curve and the primary equipment of the dc power transmission system to obtain a mapping line further includes:
when more than two wave recording curves representing the current or voltage of the primary equipment of the direct-current power transmission system are detected to exist, acquiring errors between the wave recording curves;
when errors among the wave recording curves are smaller than a preset value, acquiring a sampling point union set of the wave recording curves to acquire a mapping circuit;
and marking the fault of the electric line at the position when a few errors among the wave recording curves are larger than a preset value so as to obtain the mapping line.
In a second aspect, the present invention further provides a distributed wave recording graphical analysis apparatus, including:
the synchronization module is used for synchronizing the distributed wave recording curves to be synchronized to acquire a synchronous wave recording curve;
the circuit diagram display module is used for displaying a dynamic circuit diagram according to the mapping relation between the synchronous recording curve and the primary equipment of the direct-current power transmission system;
the positioning display module is used for automatically positioning and displaying the fault on the dynamic loop diagram according to the protection principle; wherein the content of the first and second substances,
the loop diagram display module includes:
a mapping line obtaining unit, configured to map the synchronous recording curve and the primary equipment of the dc power transmission system to obtain a mapping line;
the device comprises a preset time acquisition unit, a time setting unit and a time setting unit, wherein the preset time acquisition unit is used for acquiring a preset time value;
a detection interval acquisition unit, configured to perform a preset time interval interpolation on the preset time value to acquire a detection time interval;
an electrical quantity obtaining unit, configured to obtain an electrical quantity within the detection time interval of the mapping line;
the display unit is used for displaying, hiding or displaying the line in the dynamic circuit diagram according to the electrical quantity and graphically identifying the fault;
the positioning display module includes:
a fault point obtaining unit, configured to obtain a fault point on the dynamic loop diagram according to a protection principle;
the positioning display unit is used for automatically positioning and displaying the fault on the dynamic loop diagram according to the fault point;
the failure point acquisition unit includes:
when the current value is higher than a preset value, acquiring an overcurrent fault point;
when the total current of the same node or the generalized node is not zero, acquiring a region leakage current fault point;
when the voltage is higher than a preset value, acquiring an overvoltage fault point;
when the switch is disconnected and current exists, acquiring a switch failure point;
and when the switch is closed and the current is zero, and the current in the adjacent range is not zero, acquiring a switch malfunction fault point.
In a third aspect, an embodiment of the present invention further provides a distributed wave recording graphical analysis device, including a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, where the processor, when executing the computer program, implements the distributed wave recording graphical analysis method according to any one of the above.
In a fourth aspect, the embodiment of the present invention further provides a computer-readable storage medium, where the computer-readable storage medium includes a stored computer program, and when the computer program runs, the apparatus where the computer-readable storage medium is located is controlled to execute any one of the above-mentioned methods for analyzing the distributed wave recording graphically.
One of the above technical solutions has the following advantages: synchronizing the distributed wave recording curves to be synchronized to obtain a synchronous wave recording curve; displaying a dynamic loop diagram according to the mapping relation between the synchronous wave recording curve and primary equipment of the direct-current power transmission system; the electric quantity on the recording curve is displayed in a circuit diagram mode, the recording curve can be more visually and conveniently known, the fault is automatically positioned and displayed on the dynamic circuit diagram according to the protection principle, and the fault is quickly positioned and solved in a short time, so that the power supply recovery speed is increased, and the safe operation of a power grid is ensured.
Drawings
FIG. 1 is a schematic flow chart of a distributed wave recording graphical analysis method according to a first embodiment of the present invention;
FIG. 2 is a graph illustrating a matching function according to a first embodiment of the present invention;
FIG. 3 is an enlarged view of a matching function curve according to a first embodiment of the present invention;
FIG. 4 is a comparison diagram of a synchronous pre-oscillometric curve according to the first embodiment of the present invention;
FIG. 5 is a comparison of recording curves after synchronization according to the first embodiment of the present invention;
FIG. 6 is a schematic flow chart of another distributed wave recording graphical analysis method according to a second embodiment of the present invention;
FIG. 7 is a schematic illustration of a prior art circuit display;
FIG. 8 is an abstract line drawing illustration provided by a second embodiment of the present invention;
FIG. 9 is a dynamic loop diagram of a second embodiment of the present invention for a pole 1 double valve set metallic loop test at steady state;
fig. 10 is a dynamic loop diagram of a bipolar three-valve set operation mode test at a steady-state moment according to a second embodiment of the invention;
FIG. 11 is a schematic flow chart of another distributed wave recording graphical analysis method according to a third embodiment of the present invention;
fig. 12 is a schematic structural diagram of a distributed wave recording graphical analysis apparatus according to a fourth embodiment of the present invention;
fig. 13 is a schematic diagram of a distributed wave recording patterning analysis apparatus according to a fifth embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention provides a distributed wave recording graphical analysis method, which is used for realizing rapid positioning and solving of faults in a short time, so that the power restoration speed is improved and the safe operation of a power grid is ensured, and the detailed description is respectively provided below.
Example one
Referring to fig. 1, a schematic flow chart of a distributed wave recording graphical analysis method according to a first embodiment of the present invention is shown;
and S11, synchronizing the distributed wave recording curves to be synchronized to obtain the synchronous wave recording curves.
It should be noted that, the calculation between different physical quantities not at the same time is meaningless, so the time scales are not aligned, the electrical quantities are not consistent in time, the calculation by using a formula is not possible, the problem cannot be analyzed, and the recording curve synchronization is required here.
In this embodiment, the distributed recording includes a plurality of recording files from a plurality of apparatuses for controlling and protecting, each apparatus for controlling and protecting corresponds to a corresponding recording file, and each recording curve in each recording file has the same start-stop time and sampling rate, that is, each recording curve in each file is synchronous, but each recording curve in different recording files does not necessarily have the same valueIf a plurality of different recording files are to be synchronized, only one of the recording files is used as a reference recording file, a certain recording curve a in the reference recording file is used as a reference recording curve, and a recording curve b is selected from other recording files to be synchronized1，b2，b3，…，bnAnd synchronizing with the recording curve a respectively to realize the synchronization of all the recording files.
It should be noted that the synchronous recording curve includes the reference recording curve and the recording curve to be synchronized.
In this embodiment, a method for realizing synchronization of recording curves has an idea of detecting a sudden change characteristic quantity of a recording curve, and the method utilizes partial characteristics of the curve instead of all characteristics; the other idea is to calculate the matching degree of the two recording curves by using a matching function aiming at the whole recording curve, find the optimal matching time of the two recording curves, and finally complete the synchronization of the recording curves, which is not specifically limited in the present invention.
Specifically, the polar bus current ID L H of S1P1PPR and the polar bus current ID L H of S1P1CCP1 obtained in the engineering experiment in North-Yunnan province are respectively used as wave recording curves a and b, wherein b lags behind a for 1S, aiming at the whole wave recording curves, the matching degree of the two wave recording curves is calculated by using a matching function, the optimal matching time is searched, the wave recording curve synchronization is realized, FIGS. 2 and 3 show that the matching function m (tau) is in a form of low middle and high two sides, m is minimum when tau is-1S, and at the time, tau is the optimal matching point, FIGS. 4 and 5 show that the curves before synchronization have a difference of 1S, and the curves after synchronization almost completely coincide,
and S12, displaying a dynamic loop diagram according to the mapping relation between the synchronous wave recording curve and the primary equipment of the direct current transmission system.
In this embodiment, the primary equipment of the dc power transmission system includes a generator (motor), a transformer, a circuit breaker, a disconnector, an automatic switch, a contactor, a knife switch, a bus, a power transmission line, a power cable, a reactor, and the like, which is not particularly limited in this respect.
In this embodiment, the voltage of each node, the line current, and the switch state are obtained, the values of variables such as the effective value, the fundamental wave amplitude, and the nth harmonic amplitude are optionally performed, and the dynamic display mode of the line is determined according to the current, the voltage, or the switch state in the line, which is not specifically limited in this embodiment.
In this embodiment, the dynamic loop diagram is a primary loop diagram, and clearly and intuitively displays the voltage, the current, the switch information and the like at any time point.
And S13, automatically positioning and displaying the fault on the dynamic loop diagram according to the protection principle.
In the embodiment of the present invention, the protection principle includes overcurrent protection, overvoltage protection, current differential protection, switch malfunction protection, and the like, which is not specifically limited in the present invention.
In the embodiment of the present invention, the automatic fault location display includes a current value color changing process, a voltage value color changing process, a line color changing process, a sign prompt, an alarm prompt, and the like, which is not specifically limited in this invention.
In this embodiment, according to the protection principle, when a fault is detected in the dynamic loop diagram, fault location is immediately started, so that automatic fault location can be quickly performed according to the synchronized recording curve. The fault positioning and solving speed is effectively accelerated.
The embodiment has the following beneficial effects:
synchronizing the distributed wave recording curves to be synchronized to obtain a synchronous wave recording curve; displaying a dynamic loop diagram according to the mapping relation between the synchronous wave recording curve and primary equipment of the direct-current power transmission system; the electric quantity on the recording curve is displayed in a circuit diagram mode, the recording curve can be more visually and conveniently known, the fault is automatically positioned and displayed on the dynamic circuit diagram according to the protection principle, and the fault is quickly positioned and solved in a short time, so that the power supply recovery speed is increased, and the safe operation of a power grid is ensured.
In a second embodiment, on the basis of the first embodiment, referring to fig. 6, a schematic flow chart of another distributed wave recording graphical analysis method provided by the second embodiment of the present invention is shown;
preferably, the displaying a dynamic loop diagram according to the mapping relationship between the synchronous recording curve and the primary equipment of the dc power transmission system includes:
and S21, mapping the synchronous wave recording curve and the primary equipment of the direct current transmission system to obtain a mapping line.
In this embodiment, the synchronous recording curve includes the reference recording curve and a recording curve to be synchronized, and the primary device of the dc power transmission system includes a generator (motor), a transformer, a circuit breaker, an isolation switch, an automatic switch, a contactor, a knife switch, a bus, a power transmission line, a power cable, a reactor, and the like, which is not limited in this respect.
Specifically, taking the north-west-Yunnan direct-current engineering as an example, the wave recording of the control and protection equipment is distributed on a plurality of hosts, and the wave recording comprises direct-current station control DCC, direct-current pole control PCP1 and PCP2, direct-current pole protection PPR1 and PPR2, direct-current valve control CCP11, CCP12, CCP21, CCP22, direct-current valve protection CPR11, CPR12, CPR21 and CPR22, wherein each set of station control, pole control and valve control is equal to A, B redundancy, each set of pole protection and valve protection is equal to A, B, C redundancy, and meanwhile, the double stations have a completely symmetrical structure, so that 64 control and protection hosts in total generate wave recording. In addition, the system also has direct current filter protection, direct current valve control and RTDS wave recording generated in the FPT and DPT test process. By analyzing the wave recording file structure of the Yunnan-northwest direct current protection device, the wave recording of the Yunnan-northwest direct current protection device can be synchronized with the wave recording of the control protection device according to the table 1 by taking S1P1PPR1 as a reference file; according to the table 2, the wave recording synchronization of the RTDS control and protection equipment can be realized; finally, all the distributed wave recording is completely synchronized,
TABLE 1
TABLE 2
According to the table 3, the wave recording synchronization of the station 1 pole 2 and the station 2 pole 1/pole 2 and the station 1 pole 1, the wave recording synchronization of all the wave recording except DCC in the same pole, and the synchronization of DCC and PCP can be realized.
TABLE 3
It should be noted that in practice the dc converter station loop exists in a fixed form, see fig. 7, which is a circuit diagram of a dc transmission converter station in fig. 7, where there are 4 valve areas, 2 pole areas, 1 bipolar area, node voltage (e.g., UD L) and line current (e.g., IDCH), both having fixed names, line switches also have fixed connections, but fig. 7 has several problems:
firstly, the display is too complicated, and the ac switch and the grounding knife switch in fig. 7 are not the most important areas when the dc control protection fails.
Second, fig. 7 shows that the switches and the knife switches are closed in red and open in green, which is too messy to analyze the change of the circuit structure when the fault occurs.
And thirdly, the node voltage and the line current are not displayed in real time in the figure 7, and the analysis is not convenient.
Based on the above problem of fig. 7, an abstract diagram of an embodiment of the present invention is provided.
Referring to fig. 8, the abstract circuit diagram provided in the embodiment of the present invention includes all the connecting lines, but when the abstract circuit diagram is actually operated, all the connecting lines are not connected, some of the connecting lines are closed according to an operation mode, and some of the connecting lines are opened, which is not specifically limited in the present invention.
Referring to table 3, the variables represent the meanings:
for example, for UD L, the time length of UD L for the wave recording of a valve control host is 3s, the sampling frequency is 10kHz, the UD L time length of a PCP is 6s, the sampling frequency is 5kHz, and the UD L time length and the sampling frequency of an RTDS can be customized.
Preferably, mapping the synchronous recording curve and the primary equipment of the direct-current power transmission system to obtain a mapping line includes:
when detecting that a wave recording curve representing the current or the voltage of the primary equipment of the direct current transmission system already exists, mapping the wave recording curve with the primary equipment of the direct current transmission system to obtain a mapping line.
Preferably, the mapping the synchronous recording curve and the primary equipment of the dc power transmission system to obtain a mapping line further includes:
when more than two wave recording curves representing the current or voltage of the primary equipment of the direct-current power transmission system are detected to exist, acquiring errors between the wave recording curves;
when errors among the wave recording curves are smaller than a preset value, acquiring a sampling point union set of the wave recording curves to acquire a mapping circuit;
and marking the fault of the electric line at the position when a few errors among the wave recording curves are larger than a preset value so as to obtain the mapping line.
Specifically, in the present embodiment, for the current/voltage of the line:
firstly, if a plurality of recording files exist and only one recording curve representing the current/voltage exists, the two are directly mapped.
If a plurality of curves exist, merging the curves, wherein a merging principle is as follows: 1. if the errors of the several calculated curves are smaller than the specified value (for example, the error is calculated by the least square method), the two curves are considered to be superposed, and the sampling point is the union of the two curves. 2. If the error between the curves is less than the error value, the most of the curves is taken as the correct value, and the "current exists the correct and wrong values" is recorded in the fault list for reference, which is not specifically limited by the present invention. 3. If the differences of the curves are not consistent, the fault list records "there is an error value in the current" for reference, and the reference is marked in the circuit diagram, which is not specifically limited by the present invention.
And thirdly, if no corresponding curve exists, recording the current nonexistence value in the fault list for reference, and marking the current nonexistence value in the circuit diagram, wherein the current nonexistence value is not specifically limited in the invention.
And S22, acquiring a preset time value.
It should be noted that the oscillograph has an x-axis distribution, i.e., a time axis distribution, and a certain point in the oscillograph is specified, so that all the voltages, currents, and states of the switch and the switch at that time can be obtained, that is, all information of the complete abstract diagram is obtained, and thus a specific time value needs to be determined to serve as a time entry point.
And S23, carrying out preset time interval interpolation on the preset time value to obtain a detection time interval.
In this embodiment, for each selected preset time value t, assuming that the preset time interval is 20ms, adding corresponding lagrangian interpolation points of t and t-20ms, and constructing an accurate 20ms interval, as shown in fig. 7, where the selected 20ms example is a commonly used calculation time window for most electrical characteristics, such as an effective value, a harmonic spectrum, and the like, the length of the time window is not specifically limited in the present invention. The emphasis is on the "accurate" feature, because the 20ms time window cannot be directly obtained only by the existing discrete sampling points without interpolation or other processing, and then the electrical quantity characteristic cannot be accurately calculated.
And S24, acquiring the electrical quantity in the detection time interval of the mapping line.
The detection time interval is configured to calculate an electrical quantity related to the time interval period, for example, a voltage-current effective value, which is a basis for subsequent determination.
And S25, displaying, hiding or displaying the lines in the dynamic circuit diagram according to the electrical quantity, and identifying faults in a graphical mode.
Preferably, the displaying, hiding or displaying the lines in the dynamic loop diagram according to the electrical quantity and graphically identifying the fault comprises:
when the current value is not 0 and the switch is closed, displaying the circuit;
when the current value is 0 and the switch is closed, the circuit is hidden;
when the current value is 0 and the switch is disconnected, the circuit is hidden;
when the current value is not 0 and the switch is off, the line is displayed and a fault is identified.
In this embodiment, based on the synchronized recording, according to the principle of the differential current in the area, the leakage current can be determined and identified, and simultaneously, according to other protection principles, all types of faults such as overvoltage, overcurrent and the like can be determined and displayed, and referring to fig. 9, a dynamic loop diagram showing the steady-state time of the test of the operation mode of the metal loop of the pole 1 double-valve group is shown. Fig. 10 shows a dynamic loop diagram at a steady state time of a bipolar three-valve group (pole 1 cross valve group) operation mode test, and judges that the station 1 pole 1 direct current bus switch state is abnormal, and a station 2 pole 1 has a differential current fault. Therefore, the embodiment of the invention constructs the dynamic loop diagram and displays the fault information, and can effectively accelerate the judgment and the solution of the fault.
The embodiment has the following beneficial effects: mapping the synchronous wave recording curve and primary equipment of the direct-current power transmission system to obtain a mapping line; acquiring a preset time value; performing interpolation of a preset time interval on the preset time value to obtain a detection time interval; acquiring the electrical quantity of the mapping line within the detection time interval; and displaying, hiding or displaying the line in the dynamic circuit diagram according to the electrical quantity and identifying the fault. Based on the mapping relation between the recording and the primary loop, a dynamic loop diagram hiding a no-flow path is constructed, and the voltage, the current and the switch information at any time point are clearly and visually displayed.
In a third embodiment, on the basis of the first embodiment, referring to fig. 11, a schematic flow chart of another distributed wave recording graphical analysis method provided by a third embodiment of the present invention is shown;
preferably, the displaying of the fault automatic location on the dynamic loop diagram according to the protection principle comprises:
s31, acquiring fault points on the dynamic loop diagram according to a protection principle;
and S32, automatically positioning and displaying the fault on the dynamic loop diagram according to the fault point.
Preferably, the acquiring the fault point on the dynamic loop diagram according to the protection principle includes:
when the current value is higher than a preset value, acquiring an overcurrent fault point;
when the total current of the same node or the generalized node is not zero, acquiring a region leakage current fault point;
when the voltage is higher than a preset value, acquiring an overvoltage fault point;
when the switch is disconnected and current exists, acquiring a switch failure point;
and when the switch is closed and the current is zero, and the current in the adjacent range is not zero, acquiring a switch malfunction fault point.
Specifically, referring to fig. 9 and 10, the voltage, current, and switch states of all lines have been described in fig. 9 and 10. Firstly, the current is higher than a fixed value, which is called overcurrent protection, and the current value can be subjected to color change treatment, and the invention is not particularly limited to this; the total current of all outlets of two adjacent sections or the same generalized node is not zero, which is called current differential protection and indicates that the area has leakage current, and the area can be framed out, and the invention does not specifically limit the area; third, the voltage is higher than the fixed value, called as overvoltage protection, and the voltage value can be discolored, which is not limited in the invention; fourthly, the switch is in an off state, but current exists, which indicates that the switch refuses to operate, and the line can be discolored, and the invention is not particularly limited to this; fifthly, the switch state is closed but the current is 0, and meanwhile, the current in the adjacent range is not zero, which indicates that the switch is in misoperation, and the line can be subjected to color change treatment, and the invention is not particularly limited to this; and sixthly, the basic protection is combined with working condition and time judgment, so that all types of fault judgment can be combined, and meanwhile, the judgment result can be directly displayed on a graph, so that the operation current situation is more visual.
The embodiment has the following beneficial effects: the automatic positioning and identifying method for the fault is realized by utilizing the protection principle, and the fault positioning and solving speed is effectively accelerated.
Referring to fig. 12, fig. 12 is a schematic structural diagram of a distributed wave recording graphical analysis apparatus according to a fourth embodiment of the present invention, including:
the synchronization module 41 is configured to synchronize the distributed recording curves to be synchronized to obtain a synchronized recording curve;
a loop diagram display module 42, configured to display a dynamic loop diagram according to a mapping relationship between the synchronous recording curve and primary equipment of the dc power transmission system;
and the positioning display module 43 is used for performing automatic fault positioning display on the dynamic loop diagram according to the protection principle.
Preferably, the circuit diagram display module 42 includes:
a mapping line obtaining unit, configured to map the synchronous recording curve and the primary equipment of the dc power transmission system to obtain a mapping line;
the device comprises a preset time acquisition unit, a time setting unit and a time setting unit, wherein the preset time acquisition unit is used for acquiring a preset time value;
a detection interval acquisition unit, configured to perform preset time interval interpolation on the preset time value to acquire a detection time interval;
an electrical quantity obtaining unit, configured to obtain an electrical quantity within the detection time interval of the mapping line;
and the display unit is used for displaying, hiding or displaying the line in the dynamic circuit diagram according to the electrical quantity and graphically identifying the fault.
Preferably, the display unit includes: when the current value is not 0 and the switch is closed, displaying the circuit;
when the current value is 0 and the switch is closed, the circuit is hidden;
when the current value is 0 and the switch is disconnected, the circuit is hidden;
when the current value is not 0 and the switch is off, the line is displayed and a fault is identified.
Preferably, the circuit diagram display module 42 includes:
when detecting that a wave recording curve representing the current or the voltage of the primary equipment of the direct current transmission system already exists, mapping the wave recording curve with the primary equipment of the direct current transmission system to obtain a mapping line.
Preferably, the circuit diagram display module 42 further includes:
when more than two wave recording curves representing the current or voltage of the primary equipment of the direct-current power transmission system are detected to exist, acquiring errors between the wave recording curves;
when errors among the wave recording curves are smaller than a preset value, acquiring a sampling point union set of the wave recording curves to acquire a mapping circuit;
and marking the fault of the electric line at the position when a few errors among the wave recording curves are larger than a preset value so as to obtain the mapping line.
Preferably, the positioning display module 43 includes:
a fault point obtaining unit, configured to obtain a fault point on the dynamic loop diagram according to a protection principle;
and the positioning display unit is used for automatically positioning and displaying the fault on the dynamic loop diagram according to the fault point.
Preferably, the failure point acquiring unit includes:
when the current value is higher than a preset value, acquiring an overcurrent fault point;
when the total current of the same node or the generalized node is not zero, acquiring a region leakage current fault point;
when the voltage is higher than a preset value, acquiring an overvoltage fault point;
when the switch is disconnected and current exists, acquiring a switch failure point;
and when the switch is closed and the current is zero, and the current in the adjacent range is not zero, acquiring a switch malfunction fault point.
The embodiment has the following beneficial effects:
based on the mapping relation between the recording and the primary loop, a dynamic loop diagram hiding a no-flow path is constructed, the voltage, the current and the switch disconnecting link information at any time point are clearly and visually displayed, meanwhile, the fault automatic positioning and identifying method is realized by utilizing the protection principle, and the fault positioning and solving speed is effectively accelerated.
Referring to fig. 13, fig. 13 is a schematic diagram of a distributed wave recording graphical analysis apparatus according to a fifth embodiment of the present invention, configured to execute the distributed wave recording graphical analysis method according to the embodiment of the present invention, and as shown in fig. 13, the terminal apparatus for distributed wave recording graphical analysis includes: at least one processor 11, such as a CPU, at least one network interface 14 or other user interface 13, a memory 15, at least one communication bus 12, the communication bus 12 being used to enable connectivity communications between these components. The user interface 13 may optionally include a USB interface, and other standard interfaces, wired interfaces. The network interface 14 may optionally include a Wi-Fi interface as well as other wireless interfaces. The memory 15 may comprise a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory. The memory 15 may optionally comprise at least one memory device located remotely from the aforementioned processor 11.
In some embodiments, memory 15 stores the following elements, executable modules or data structures, or a subset thereof, or an expanded set thereof:
an operating system 151, which contains various system programs for implementing various basic services and for processing hardware-based tasks;
and (5) a procedure 152.
Specifically, the processor 11 is configured to call the program 152 stored in the memory 15 to execute the distributed wave recording graphics analysis method according to the above embodiment.
The Processor may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. The general-purpose processor can be a microprocessor or the processor can be any conventional processor and the like, the processor is a control center of the distributed wave recording graphical analysis method, and various interfaces and lines are used for connecting various parts of the whole distributed wave recording graphical analysis method.
The memory may be used to store the computer programs and/or modules, and the processor may be configured to implement the various functions of the electronic device for distributed wave recording graphical analysis by executing or executing the computer programs and/or modules stored in the memory and invoking the data stored in the memory. The memory may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, a text conversion function, etc.), and the like; the storage data area may store data (such as audio data, text message data, etc.) created according to the use of the cellular phone, etc. In addition, the memory may include high speed random access memory, and may also include non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), at least one magnetic disk storage device, a Flash memory device, or other volatile solid state storage device.
The distributed recording graphical analysis integrated module can be stored in a computer readable storage medium if the module is realized in the form of a software functional unit and sold or used as an independent product. Based on such understanding, all or part of the flow of the method according to the embodiments of the present invention may also be implemented by a computer program, which may be stored in a computer-readable storage medium, and when the computer program is executed by a processor, the steps of the method embodiments may be implemented. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer readable medium may contain content that is subject to appropriate increase or decrease as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media does not include electrical carrier signals and telecommunications signals as is required by legislation and patent practice.
It should be noted that the above-described device embodiments are merely illustrative, where the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. In addition, in the drawings of the embodiment of the apparatus provided by the present invention, the connection relationship between the modules indicates that there is a communication connection between them, and may be specifically implemented as one or more communication buses or signal lines. One of ordinary skill in the art can understand and implement it without inventive effort.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
It should be noted that, in the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and in a part that is not described in detail in a certain embodiment, reference may be made to the related descriptions of other embodiments. Further, those skilled in the art will appreciate that the embodiments described in the specification are preferred and that acts and simulations are necessarily required in accordance with the invention.
Claims (7)
1. A distributed wave recording graphical analysis method is characterized by comprising the following steps:
synchronizing the distributed wave recording curves to be synchronized to obtain a synchronous wave recording curve;
displaying a dynamic loop diagram according to the mapping relation between the synchronous wave recording curve and primary equipment of the direct-current power transmission system;
automatically positioning and displaying faults on the dynamic loop diagram according to a protection principle; wherein the content of the first and second substances,
the displaying a dynamic loop diagram according to the mapping relationship between the synchronous recording curve and the primary equipment of the direct-current power transmission system comprises:
mapping the synchronous wave recording curve and primary equipment of the direct-current power transmission system to obtain a mapping line;
acquiring a preset time value;
performing interpolation of a preset time interval on the preset time value to obtain a detection time interval;
acquiring the electrical quantity of the mapping line within the detection time interval;
displaying, hiding or displaying the line in the dynamic loop diagram according to the electrical quantity, and identifying the fault in a graphical manner;
the automatic fault positioning display on the dynamic loop diagram according to the protection principle comprises the following steps:
acquiring a fault point on the dynamic loop diagram according to a protection principle;
automatically positioning and displaying the fault on the dynamic loop diagram according to the fault point;
the obtaining of the fault point on the dynamic loop diagram according to the protection principle includes:
when the current value is higher than a preset value, acquiring an overcurrent fault point;
when the total current of the same node or the generalized node is not zero, acquiring a region leakage current fault point;
when the voltage is higher than a preset value, acquiring an overvoltage fault point:
when the switch is disconnected and current exists, acquiring a switch failure point;
and when the switch is closed and the current is zero, and the current in the adjacent range is not zero, acquiring a switch malfunction fault point.
2. The distributed wave recording graphical analysis method according to claim 1, wherein the displaying, hiding or displaying lines in the dynamic loop diagram and graphically identifying faults according to the electrical quantity comprises:
when the current value is not 0 and the switch is closed, displaying the circuit;
when the current value is 0 and the switch is closed, the circuit is hidden;
when the current value is 0 and the switch is disconnected, the circuit is hidden;
when the current value is not 0 and the switch is off, the line is displayed and a fault is identified.
3. The distributed wave recording graphical analysis method according to claim 1, wherein the mapping the synchronous wave recording curve and the primary equipment of the direct-current power transmission system to obtain a mapping line comprises:
when detecting that a wave recording curve representing the current or the voltage of the primary equipment of the direct current transmission system already exists, mapping the wave recording curve with the primary equipment of the direct current transmission system to obtain a mapping line.
4. The distributed wave recording graphical analysis method according to claim 1, wherein the mapping the synchronous wave recording curve and the primary equipment of the direct current transmission system to obtain a mapping line further comprises:
when more than two wave recording curves representing the current or voltage of the primary equipment of the direct-current power transmission system are detected to exist, acquiring errors between the wave recording curves;
when errors among the wave recording curves are smaller than a preset value, acquiring a sampling point union set of the wave recording curves to acquire a mapping circuit;
and marking the fault of the electric line at the position when a few errors among the wave recording curves are larger than a preset value so as to obtain the mapping line.
5. A distributed wave recording graphical analysis device is characterized by comprising:
the synchronization module is used for synchronizing the distributed wave recording curves to be synchronized to acquire a synchronous wave recording curve;
the circuit diagram display module is used for displaying a dynamic circuit diagram according to the mapping relation between the synchronous recording curve and the primary equipment of the direct-current power transmission system;
the positioning display module is used for automatically positioning and displaying the fault on the dynamic loop diagram according to the protection principle; wherein the content of the first and second substances,
the loop diagram display module includes:
a mapping line obtaining unit, configured to map the synchronous recording curve and the primary equipment of the dc power transmission system to obtain a mapping line;
the device comprises a preset time acquisition unit, a time setting unit and a time setting unit, wherein the preset time acquisition unit is used for acquiring a preset time value;
a detection interval acquisition unit, configured to perform a preset time interval interpolation on the preset time value to acquire a detection time interval;
an electrical quantity obtaining unit, configured to obtain an electrical quantity within the detection time interval of the mapping line;
the display unit is used for displaying, hiding or displaying the line in the dynamic circuit diagram according to the electrical quantity and graphically identifying the fault;
the positioning display module includes:
a fault point obtaining unit, configured to obtain a fault point on the dynamic loop diagram according to a protection principle;
the positioning display unit is used for automatically positioning and displaying the fault on the dynamic loop diagram according to the fault point;
the failure point acquisition unit includes:
when the current value is higher than a preset value, acquiring an overcurrent fault point;
when the total current of the same node or the generalized node is not zero, acquiring a region leakage current fault point;
when the voltage is higher than a preset value, acquiring an overvoltage fault point;
when the switch is disconnected and current exists, acquiring a switch failure point;
and when the switch is closed and the current is zero, and the current in the adjacent range is not zero, acquiring a switch malfunction fault point.
6. A distributed wave recording graphical analysis apparatus comprising a processor, a memory and a computer program stored in the memory and configured to be executed by the processor, the processor implementing the distributed wave recording graphical analysis method of any one of claims 1 to 4 when executing the computer program.
7. A computer-readable storage medium, comprising a stored computer program, wherein the computer program, when executed, controls an apparatus in which the computer-readable storage medium is located to perform the distributed wave recording graphical analysis method according to any one of claims 1 to 4.
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Effective date of registration: 20210712 Address after: No. 11, Kexiang Road, Science City, Huangpu District, Guangzhou City, Guangdong Province Patentee after: China South Power Grid International Co.,Ltd. Patentee after: CHINA SOUTHERN POWER GRID Co.,Ltd. Address before: No. 11, Kexiang Road, Science City, Huangpu District, Guangzhou City, Guangdong Province Patentee before: China South Power Grid International Co.,Ltd. Patentee before: POWER GRID TECHNOLOGY RESEARCH CENTER. CHINA SOUTHERN POWER GRID Patentee before: CHINA SOUTHERN POWER GRID Co.,Ltd. |