CN117763471A - Digital power distribution network fault processing system and method - Google Patents
Digital power distribution network fault processing system and method Download PDFInfo
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Abstract
The invention discloses a digital power distribution network fault processing system and a digital power distribution network fault processing method, which relate to the technical field of fault processing and solve the problem of decision errors caused by the fact that linkage abnormality is not considered, wherein the abnormal nodes are locked based on specific numerical values of monitoring data of different nodes of the digital power distribution network, and then whether the abnormal nodes belong to a single group of abnormal nodes or the linkage abnormal nodes is determined; for a single group of abnormal nodes, directly adopting test current to perform internal resistance heating test, determining an internal resistance heating curve, generating corresponding processing signals based on the numerical change of the internal resistance heating curve, and displaying the processing signals; aiming at the linkage abnormal node, the synchronous abnormal node is preferentially determined, then step-by-step test is carried out, and other abnormal nodes are not needed to be analyzed on the premise of locking the abnormal node, so that the comprehensiveness of numerical analysis of the abnormal node is improved, and the overall effect of fault processing of the power distribution network is improved.
Description
Technical Field
The invention relates to the technical field of fault processing, in particular to a system and a method for processing faults of a digital power distribution network.
Background
The distribution network refers to a power network that receives electric energy from a power transmission network or a regional power plant, and distributes the electric energy locally or step by step according to voltage through a distribution facility.
The patent publication No. CN115800216A discloses a digital power distribution network fault processing system, which relates to the technical field of power distribution networks and comprises an information acquisition module, a device connection module, an information integration module, a three-dimensional model construction module, a virtual model module, a fault influence estimation module, an optimal processing scheme generation module and a processing scheme providing module; according to the digital power distribution network fault processing system, a fault equipment condition acquisition module judges equipment faults according to abnormal data and abnormal operation conditions, a fault type determination module judges fault types according to equipment fault information, a fault simulation module loads the acquired power distribution network equipment fault information onto a virtual model, a preprocessing scheme module selects corresponding multiple solutions according to fault equipment and fault types, and a processing scheme judgment module carries out simulation implementation on the multiple fault processing schemes and selects an optimal solution, so that the power distribution network faults can be rapidly solved.
When the digital power distribution network performs fault processing, it is generally required to determine whether the corresponding point is in a fault state according to the point location data generated by the corresponding point location, and then personnel dispatch is performed.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a digital power distribution network fault processing system and method, which solve the problem of decision errors caused by the fact that linkage abnormality is not considered.
In order to achieve the above purpose, the invention is realized by the following technical scheme: a digital power distribution network fault handling system comprising:
the data analysis end checks the monitored power parameter with a preset interval, and judges whether the node belongs to an abnormal node or not based on a checking result, wherein the specific mode is as follows:
calibrating power parameters of different nodes as DL i Wherein i represents different nodes, determining the power parameter DL i Whether the electric power parameter belongs to a preset interval, wherein the end point values of the preset interval are preset values, if the electric power parameter belongs to the preset interval, no processing is performed, and if the electric power parameter does not belong to the preset interval, the electric power parameter is calibrated to be an abnormal parameter;
based on the time point of occurrence of the abnormal parameter, a group of monitoring periods T1 are confirmed backwards, wherein T1 is a preset value, specific times of occurrence of the abnormal parameter in the monitoring period T1 are confirmed, if the specific times are more than or equal to 5, the node is marked as an abnormal node, otherwise, the node is not marked;
an abnormal point position classifying end for identifying whether the points interconnected before and after the abnormal point position have abnormal conditions or not, and calibrating the abnormal point position as a single group of abnormal point positions or linkage abnormal point positions based on the identification result;
the linkage point position determining end is used for analyzing whether the fluctuation conditions of the power parameters of different points in the linkage abnormal point positions are consistent, and based on analysis results, the abnormal point positions are marked as synchronous abnormal point positions or single group of abnormal point positions, and the specific mode is as follows:
defining a group of processing periods T2, wherein T2 is a preset value, and constructing a power parameter fluctuation curve of a corresponding point location based on the power parameter monitored by the processing period T2;
comparing the fluctuation trend of the power parameter fluctuation curves of different points, if the fluctuation trend is the same in the same time period, calibrating adjacent points as synchronous abnormal points, otherwise, calibrating adjacent abnormal points as a single group of abnormal points;
the point position testing terminal is used for carrying out power testing on the abnormal point positions, determining an internal resistance heating curve based on the testing data, judging whether the internal resistance heating problem exists or not based on the internal resistance heating curve, and generating corresponding processing signals.
Preferably, the point location testing terminal directly performs power testing on a single group of abnormal point locations, determines an internal resistance heating curve based on test data, then determines whether an internal resistance heating problem exists based on the internal resistance heating curve, randomly selects one group of point locations for testing if the point location testing is free of problems, directly marks the other point location as a fault point location and displays the fault point location, performs one-to-one testing if the synchronous abnormal point locations have multiple groups, and does not need to test the other point locations again if the corresponding fault point locations are tested; the specific method is as follows:
inputting test current into the abnormal point positions, wherein the test current is preset current, carrying out periodic test on a single group of abnormal point positions based on the test current, and recording an internal resistance heating curve generated in the period;
determining trend change values among different temperature points of the internal resistance heating curve, wherein the trend change values = vertical coordinate differences of adjacent points +.;
if the trend change value is more than Y1, wherein Y1 is a preset value, calibrating the line segments of the adjacent points as abnormal temperature line segments, otherwise, not performing any calibration;
determining the ratio of the abnormal temperature line segment to the internal resistance heating curve, wherein the ratio=the line length of the abnormal temperature line segment +.1-2, and if the ratio is more than Y2, generating an internal resistance heating abnormal signal and displaying the internal resistance heating abnormal signal through a display end;
if the ratio is less than or equal to Y2, no processing signal is generated.
Preferably, the method for processing the faults of the digital power distribution network comprises the following steps:
step one, checking the power parameter with a preset interval based on the monitored power parameter, and judging whether the node belongs to an abnormal node or not based on a checking result;
step two, based on the calibrated abnormal point, identifying whether the points interconnected before and after the abnormal point have abnormal conditions, if not, calibrating the abnormal point as a single group of abnormal points, directly executing a point testing terminal, and if so, calibrating the abnormal point as a linkage abnormal point;
step three, carrying out power test on a single group of abnormal point positions, determining an internal resistance heating curve based on test data, then judging whether an internal resistance heating problem exists based on the internal resistance heating curve, and generating a corresponding processing signal;
fourth, the power parameters marked as different points in the linkage abnormal point are monitored again, whether fluctuation conditions of the power parameters of the different points are consistent or not is analyzed, and if the fluctuation conditions are consistent, adjacent abnormal points are marked as synchronous abnormal points;
and fifthly, randomly selecting one group of points to test if the synchronous abnormal points are located, directly marking the other point as a fault point and displaying if the synchronous abnormal points are not in a problem, carrying out one-to-one test if the synchronous abnormal points are in a plurality of groups, and testing other points without retesting if the corresponding fault points are tested.
The invention provides a digital power distribution network fault processing system and method. Compared with the prior art, the method has the following beneficial effects:
according to the invention, the data of different nodes of the digital power distribution network are monitored, the abnormal nodes are locked based on the specific numerical values of the monitoring, and whether the abnormal nodes belong to a single group of abnormal nodes or are linked with the abnormal nodes is determined;
for a single group of abnormal nodes, directly adopting test current to perform internal resistance heating test, determining an internal resistance heating curve, generating corresponding processing signals based on the numerical change of the internal resistance heating curve, and displaying the processing signals;
aiming at the linkage abnormal node, the synchronous abnormal node is preferentially determined, then step-by-step test is carried out, and other abnormal nodes are not needed to be analyzed on the premise of locking the abnormal node, so that the comprehensiveness of numerical analysis of the abnormal node is improved, and the overall effect of fault processing of the power distribution network is improved.
Drawings
FIG. 1 is a schematic diagram of a principal frame of the present invention;
FIG. 2 is a schematic flow chart of the method of the present invention;
FIG. 3 is a flow chart of generating an internal resistance heating abnormality signal according to the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
Referring to fig. 1, the application provides a digital power distribution network fault processing system, which comprises a node monitoring end, a data analysis end, an abnormal point location classification end, a point location testing end, a linkage point location determining end and a display end;
the node monitoring end is electrically connected with the data analysis end input node, the data analysis end is electrically connected with the abnormal point position classification end input node, the abnormal point position classification end is electrically connected with the point position testing end and the linkage point position determining end input node respectively, the linkage point position determining end is electrically connected with the point position testing end input node, and the point position testing end is electrically connected with the display end input node;
the node monitoring terminal monitors the power parameters of different nodes in the digital power distribution network, and transmits the power parameters of different nodes generated in the monitoring process to the data analysis terminal, wherein the power parameters can be understood as power distribution parameters, current parameters or voltage parameters which are one of a plurality of groups of parameters, and the power parameters are set by an operator;
the data analysis end checks the power parameter with a preset interval based on the monitored power parameter, and judges whether the node belongs to an abnormal node based on a check result, wherein the specific mode for judging is as follows:
calibrating power parameters of different nodes as DL i Wherein i represents different nodes, determining the power parameter DL i Whether the electric power parameter belongs to a preset interval or not, wherein the endpoint values of the preset interval are preset values, the specific values are all determined by an operator according to experience, if the electric power parameter belongs to the preset interval, no processing is performed, and if the electric power parameter does not belong to the preset interval, the electric power parameter is calibrated to be an abnormal parameter;
based on the time point of occurrence of the abnormal parameter, a group of monitoring periods T1 are confirmed backwards, wherein T1 is a preset value, the specific value is drawn by an operator according to experience, the specific times of occurrence of the abnormal parameter in the monitoring period T1 are confirmed, if the specific times are more than or equal to 5, the node is marked as an abnormal node, otherwise, the node is not marked;
examples: corresponding parameters can appear corresponding fluctuation conditions in the monitoring process, when the fluctuation parameters appear too many times, the node value is represented to be abnormal, so that the node belongs to an abnormal node, fault analysis is needed, fault determination is carried out by adopting the mode, the condition of misjudgment caused by fluctuation of the value can be effectively avoided, and the accuracy of fault determination is improved.
The abnormal point position classifying end identifies whether the points interconnected before and after the abnormal point position exist abnormal conditions based on the calibrated abnormal point positions, if not, the abnormal point position is calibrated as a single group of abnormal point positions, the point position testing end is directly executed, if so, the abnormal point position is calibrated as a linkage abnormal point position, and the linkage point position determining end is executed;
referring to fig. 3, the point location testing terminal performs power testing on a single group of abnormal points, determines an internal resistance heating curve based on test data, then determines whether there is an internal resistance heating problem based on the internal resistance heating curve, and generates a corresponding processing signal, and displays the processing signal through the display terminal, wherein the specific mode of determining is as follows:
inputting test current into the single-group abnormal point positions, wherein the test current is preset current, the values of the test current are all determined by an operator according to experience, the single-group abnormal point positions are subjected to periodic test based on the test current, and an internal resistance heating curve generated in the period is recorded;
determining trend change values among different temperature points of the internal resistance heating curve, wherein the trend change values are slopes, the trend change values = vertical coordinate differences of adjacent points/(horizontal coordinate differences of adjacent points), and the coordinate differences are values of the latter point minus values of the former point;
if the trend change value is more than Y1, wherein Y1 is a preset value, the specific value is drawn by an operator according to experience, the line segments of adjacent points are marked as abnormal temperature line segments, otherwise, no marking is carried out;
determining the ratio of the abnormal temperature line segment to the internal resistance heating curve, wherein the ratio=the line length of the abnormal temperature line segment +.1.2 the line length of the internal resistance heating curve, if the ratio is more than Y2, wherein Y2 is a preset value, the specific value is drawn by an operator according to experience, an internal resistance heating abnormal signal is generated, and the internal resistance heating abnormal signal is displayed through a display end, otherwise, no processing signal is generated;
examples: firstly, when the corresponding point position is abnormal, an abnormality analysis is needed to lock the internal temperature of the abnormal point position, if the temperature change is abnormal, the change trend value of the abnormal point position is abnormal, the abnormal calibration is needed for the corresponding line segment with the abnormal change trend value, the abnormal temperature line segment is locked from the calibration result, and then, based on the specific duty ratio of the abnormal temperature line segment, for example: in the internal resistance heating curves, the specific proportion of the abnormal temperature line segments is 1/2, wherein Y2 is generally 0.3 and exceeds 0.3, an internal resistance heating abnormal signal is generated and displayed, and an operator carries out corresponding processing based on the abnormal signal to timely complete fault maintenance processing work.
Example two
In the specific implementation process of the embodiment, compared with the first embodiment, the specific difference is that the embodiment mainly performs fault analysis on the linkage abnormal point to determine whether the linkage abnormal point has a synchronous abnormal point;
the linkage point position determining end monitors the power parameters calibrated as different point positions in the linkage abnormal point positions again and analyzes whether the fluctuation conditions of the power parameters of the different point positions are consistent, if so, the adjacent abnormal point positions are calibrated as synchronous abnormal point positions, otherwise, the corresponding abnormal point positions are calibrated as single group of abnormal point positions, the single group of abnormal point positions are tested through the point position testing end, and the specific mode of analysis is as follows:
defining a group of processing periods T2, wherein T2 is a preset value, the specific value of the processing period T2 is drawn by an operator according to experience, and a power parameter fluctuation curve of a corresponding point position is constructed based on the power parameters monitored by the processing period T2;
and comparing the fluctuation trend of the power parameter fluctuation curves of different points, if the fluctuation trend is the same in the same time period, calibrating adjacent points as synchronous abnormal points, otherwise, calibrating adjacent abnormal points as single-group abnormal points, wherein the trend is the same in the corresponding time period, namely, when the numerical segments of the adjacent points are in a climbing state, the trend is the same, namely, the trend is different, and when the trend is different in the same time period, the trend of the numerical segments is different, namely, the numerical segments do not belong to the synchronous abnormal points.
The point position testing terminal is used for directly carrying out electric power testing on a single group of abnormal point positions, determining an internal resistance heating curve based on test data, then judging whether an internal resistance heating problem exists or not based on the internal resistance heating curve, randomly selecting one group of point positions for testing if the point position is in a synchronous abnormal point position, directly marking the other point position as a fault point position and displaying if the point position is in a non-problematic state, carrying out one-to-one testing if a plurality of groups of synchronous abnormal point positions exist, and otherwise, not testing the other point positions again.
With reference to fig. 2, the application further includes a method for processing faults of the digital power distribution network, which includes the following steps:
step one, checking the power parameter with a preset interval based on the monitored power parameter, and judging whether the node belongs to an abnormal node or not based on a checking result;
step two, based on the calibrated abnormal point, identifying whether the points interconnected before and after the abnormal point have abnormal conditions, if not, calibrating the abnormal point as a single group of abnormal points, directly executing a point testing terminal, and if so, calibrating the abnormal point as a linkage abnormal point;
step three, carrying out power test on a single group of abnormal point positions, determining an internal resistance heating curve based on test data, then judging whether an internal resistance heating problem exists based on the internal resistance heating curve, and generating a corresponding processing signal;
fourth, the power parameters marked as different points in the linkage abnormal point are monitored again, whether fluctuation conditions of the power parameters of the different points are consistent or not is analyzed, and if the fluctuation conditions are consistent, adjacent abnormal points are marked as synchronous abnormal points;
and fifthly, randomly selecting a group of points to test aiming at the synchronous abnormal points, if the point testing has no problem, directly marking the other point as a fault point and displaying, if the synchronous abnormal points have a plurality of groups, carrying out one-to-one testing, and if the corresponding fault point is tested, not testing the other points again.
Example III
This embodiment includes all of the implementations of the two sets of embodiments described above.
Some of the data in the above formulas are numerical calculated by removing their dimensionality, and the contents not described in detail in the present specification are all well known in the prior art.
The above embodiments are only for illustrating the technical method of the present invention and not for limiting the same, and it should be understood by those skilled in the art that the technical method of the present invention may be modified or substituted without departing from the spirit and scope of the technical method of the present invention.
Claims (9)
1. The utility model provides a digital distribution network fault handling system which characterized in that includes:
the data analysis end checks the monitored power parameter with a preset interval and judges whether the node belongs to an abnormal node or not based on a checking result;
an abnormal point position classifying end for identifying whether the points interconnected before and after the abnormal point position have abnormal conditions or not, and calibrating the abnormal point position as a single group of abnormal point positions or linkage abnormal point positions based on the identification result;
the linkage point position determining end is used for analyzing whether the fluctuation conditions of the power parameters of different points in the linkage abnormal point positions are consistent or not, and calibrating the abnormal point positions as synchronous abnormal point positions or single group of abnormal point positions based on an analysis result;
the point position testing terminal is used for carrying out power testing on the abnormal point positions, determining an internal resistance heating curve based on the testing data, judging whether the internal resistance heating problem exists or not based on the internal resistance heating curve, and generating corresponding processing signals.
2. The fault handling system for a digital power distribution network according to claim 1, wherein the identifying means for the abnormal point location classification terminal includes:
if no abnormal point positions of the front-back interconnection exist, the abnormal point positions are marked as a single group of abnormal point positions, and a point position testing end is directly executed;
if there is an abnormal point of the front-back interconnection, the abnormal point is marked as a linkage abnormal point, and a linkage point determining end is executed.
3. The fault handling system of claim 1, wherein the determining the linkage point location, analyzing the power parameter fluctuation of different points in the linkage abnormal point location comprises:
if the two abnormal points are consistent, calibrating the adjacent abnormal points as synchronous abnormal points;
otherwise, the corresponding abnormal point positions are marked as a single group of abnormal point positions, and the testing is carried out through the point position testing terminal.
4. The fault handling system for a digital power distribution network according to claim 3, wherein the specific way for the determining end of the linkage point location to analyze whether the fluctuation conditions of the power parameters of different point locations are consistent is as follows:
defining a group of processing periods T2, wherein T2 is a preset value, and constructing a power parameter fluctuation curve of a corresponding point location based on the power parameter monitored by the processing period T2;
and comparing the fluctuation trend of the power parameter fluctuation curves of different points, if the fluctuation trend is the same in the same time period, calibrating adjacent points as synchronous abnormal points, otherwise, calibrating adjacent abnormal points as a single group of abnormal points.
5. The fault handling system for a digital power distribution network according to claim 1, wherein the specific way for the data analysis end to determine whether the node belongs to an abnormal node is:
calibrating power parameters of different nodes as DL i Wherein i represents different nodes, determining the power parameter DL i Whether the electric power parameter belongs to a preset interval, wherein the end point values of the preset interval are preset values, if the electric power parameter belongs to the preset interval, no processing is performed, and if the electric power parameter does not belong to the preset interval, the electric power parameter is calibrated to be an abnormal parameter;
based on the time point of occurrence of the abnormal parameter, a group of monitoring periods T1 are confirmed backwards, wherein T1 is a preset value, specific times of occurrence of the abnormal parameter in the monitoring period T1 are confirmed, if the specific times are more than or equal to 5, the node is marked as an abnormal node, and otherwise, no marking is carried out.
6. The system according to claim 1, wherein the point location testing terminal directly performs power testing on a single group of abnormal points, determines an internal resistance heating curve based on test data, then determines whether there is an internal resistance heating problem based on the internal resistance heating curve, randomly selects a group of point locations for testing if there is no problem in the point location testing, directly marks another point location as a fault point location and displays the fault point location if there is a plurality of groups of abnormal point locations, performs one-to-one testing if there is a corresponding fault point location, and does not need to test the other point locations again if there is a corresponding fault point location.
7. The fault handling system for a digital power distribution network according to claim 6, wherein the point location testing terminal performs the specific testing method as follows:
inputting test current into the abnormal point positions, wherein the test current is preset current, carrying out periodic test on a single group of abnormal point positions based on the test current, and recording an internal resistance heating curve generated in the period;
determining trend change values among different temperature points of the internal resistance heating curve, wherein the trend change values = vertical coordinate differences of adjacent points +.;
if the trend change value is more than Y1, wherein Y1 is a preset value, calibrating the line segments of the adjacent points as abnormal temperature line segments, otherwise, not performing any calibration;
and determining the ratio of the abnormal temperature line segment to the internal resistance heating curve, wherein the ratio=the line length of the abnormal temperature line segment +.1.2, and if the ratio is more than Y2, wherein Y2 is a preset value, generating an internal resistance heating abnormal signal, and displaying through a display end.
8. The fault handling system for a digital power distribution network according to claim 7, wherein the specific manner in which the point location testing terminal performs the test further comprises:
if the ratio is less than or equal to Y2, no processing signal is generated.
9. A method for processing faults of a digital power distribution network, which is applied to a system for processing faults of the digital power distribution network according to any one of claims 1 to 8, and is characterized by comprising the following steps:
step one, checking the power parameter with a preset interval based on the monitored power parameter, and judging whether the node belongs to an abnormal node or not based on a checking result;
step two, based on the calibrated abnormal point, identifying whether the points interconnected before and after the abnormal point have abnormal conditions, if not, calibrating the abnormal point as a single group of abnormal points, directly executing a point testing terminal, and if so, calibrating the abnormal point as a linkage abnormal point;
step three, carrying out power test on a single group of abnormal point positions, determining an internal resistance heating curve based on test data, then judging whether an internal resistance heating problem exists based on the internal resistance heating curve, and generating a corresponding processing signal;
fourth, the power parameters marked as different points in the linkage abnormal point are monitored again, whether fluctuation conditions of the power parameters of the different points are consistent or not is analyzed, and if the fluctuation conditions are consistent, adjacent abnormal points are marked as synchronous abnormal points;
and fifthly, randomly selecting one group of points to test if the synchronous abnormal points are located, directly marking the other point as a fault point and displaying if the synchronous abnormal points are not in a problem, carrying out one-to-one test if the synchronous abnormal points are in a plurality of groups, and testing other points without retesting if the corresponding fault points are tested.
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