CN115453288B - Partial discharge monitoring system of high-voltage switch cabinet - Google Patents
Partial discharge monitoring system of high-voltage switch cabinet Download PDFInfo
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- CN115453288B CN115453288B CN202211123236.5A CN202211123236A CN115453288B CN 115453288 B CN115453288 B CN 115453288B CN 202211123236 A CN202211123236 A CN 202211123236A CN 115453288 B CN115453288 B CN 115453288B
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 13
- 238000001514 detection method Methods 0.000 claims abstract description 143
- 238000012545 processing Methods 0.000 claims abstract description 17
- 230000002159 abnormal effect Effects 0.000 claims abstract description 10
- 238000007405 data analysis Methods 0.000 claims abstract description 10
- 238000004891 communication Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 19
- 238000010586 diagram Methods 0.000 claims description 9
- 238000013507 mapping Methods 0.000 claims description 5
- 230000000875 corresponding effect Effects 0.000 description 24
- 238000009413 insulation Methods 0.000 description 8
- 230000015556 catabolic process Effects 0.000 description 6
- 230000005856 abnormality Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- 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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- 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
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3272—Apparatus, systems or circuits therefor
- G01R31/3274—Details related to measuring, e.g. sensing, displaying or computing; Measuring of variables related to the contact pieces, e.g. wear, position or resistance
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00001—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Human Computer Interaction (AREA)
- Theoretical Computer Science (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The invention discloses a high-voltage switch cabinet partial discharge monitoring system, which relates to the technical field of switch cabinet monitoring and comprises a monitoring center, and is characterized in that the monitoring center is in communication connection with a data acquisition module, a data processing module, a data analysis module and a positioning early warning module; through setting up the detection node in high tension switchgear, according to the current flow direction, confirm the incidence relation between the detection node to according to the discharge data of detection node obtained, judge whether the electric power operation of detection node is normal, if abnormal, confirm the position that leads to electric power operation abnormal fast according to the incidence relation between the detection node, thereby can realize the effective monitoring to the electric power running state inside the high tension switchgear, can lock fast when the electric power running state of high tension switchgear is unusual again and produce the position that electric power operation is unusual.
Description
Technical Field
The invention relates to the technical field of switch cabinet monitoring, in particular to a high-voltage switch cabinet partial discharge monitoring system.
Background
Practices in recent years show that partial discharge is a main cause of insulation degradation of a switch cabinet and finally insulation accidents. Insulation faults are often accompanied by the generation of partial discharges. The partial discharge is the discharge which occurs between the electrodes but does not penetrate the electrodes, and is characterized in that the phenomenon of repeated breakdown and extinction occurs under the action of high electric field intensity due to the weakness in the insulation of equipment or the defect in the production process, and the partial discharge is represented by the breakdown of gas in the insulation, the partial breakdown of solid or liquid medium in a small range, the partial breakdown discharge caused by the concentration of field intensity at the edge and sharp corner part of the metal surface, and the like; the insulation of electrical equipment continuously generates partial discharge under the operating voltage, and the weak discharge generates accumulated effect, so that the dielectric property of the insulation is gradually deteriorated and partial defects are enlarged, and finally the whole insulation breakdown is caused, so that the partial discharge is a potential hidden trouble for a switch cabinet;
if the discharge condition inside the high-voltage switch cabinet is effectively monitored, and when the power operation abnormality occurs in the high-voltage switch cabinet, the position causing the abnormality can be rapidly determined, which is a problem to be solved, and therefore, the high-voltage switch cabinet partial discharge monitoring system is provided.
Disclosure of Invention
The invention aims to provide a partial discharge monitoring system of a high-voltage switch cabinet.
The aim of the invention can be achieved by the following technical scheme: the high-voltage switch cabinet partial discharge monitoring system comprises a monitoring center, wherein the monitoring center is in communication connection with a data acquisition module, a data processing module, a data analysis module and a positioning early warning module;
the data acquisition module comprises a plurality of data acquisition terminals and is used for acquiring discharge data of each detection node in the high-voltage switch cabinet;
the data processing module is used for processing the discharge data obtained by the data acquisition module to obtain discharge judgment coefficients of all the detection nodes;
the data analysis module is used for analyzing the power running state of the position of each detection node in the high-voltage switch cabinet according to the received discharge judgment coefficient of each detection node;
and the positioning early warning module is used for determining the position of abnormal power operation according to the received early warning information.
Further, the process of acquiring the discharge data by the data acquisition module includes:
setting detection nodes in the high-voltage switch cabinet, setting corresponding data acquisition terminals in each detection node, and marking the power operation relation of the detection nodes to form a node relation diagram;
and acquiring discharge data of each detection node in real time through a data acquisition terminal, wherein the discharge data comprises output voltage and output current.
Further, detecting the power operation relationship of the node includes:
marking two adjacent detection nodes;
respectively marking the marked two detection nodes as an upper detection node and a lower detection node according to the current flow direction, and associating the upper detection node with the lower detection node;
and outputting the association relations among all the detection nodes, and obtaining a node relation diagram.
Further, the process of the data processing module for processing the discharge data includes:
establishing a two-dimensional coordinate system of time with respect to current and voltage;
respectively generating a voltage change curve and a current change curve according to the obtained output voltage and output current of the detection node, and mapping the generated voltage change curve and current change curve into a two-dimensional coordinate system to obtain a discharge data change diagram of the detection node;
obtaining output voltage and output current corresponding to a voltage change curve and a current change curve in a corresponding discharge data change graph of the upper detection node;
acquiring output voltage and output current corresponding to a voltage change curve and a current change curve in a discharge data change graph of all lower detection nodes associated with the upper detection node;
and obtaining the discharge judgment coefficient between the upper detection node and the lower detection node associated with the upper detection node.
Further, the process of analyzing the power running state of the position of each detection node in the high-voltage switch cabinet by the data analysis module comprises the following steps:
setting a discharge data comparison table, matching the obtained discharge judgment coefficient with the discharge data comparison table to obtain the power running state of the corresponding detection node, judging whether the power running between the lower detection nodes associated with the upper detection node is normal according to the obtained power running state, if so, not performing any operation, and if not, marking the upper detection node and the corresponding lower detection node and obtaining early warning information associated with the power running state.
Further, the process of determining the abnormal position of the power operation by the positioning early warning module comprises the following steps:
establishing a three-dimensional coordinate system, and mapping the internal structure of the high-voltage switch cabinet into the three-dimensional coordinate system to obtain a high-voltage switch cabinet model;
marking corresponding positions in the high-voltage switch cabinet model in a three-dimensional coordinate system according to the positions of all the detection nodes, and obtaining the three-dimensional coordinates of all the detection nodes;
marking an upper detection node and a corresponding lower detection node which generate early warning information according to the received early warning information;
and acquiring three-dimensional coordinates of the marked upper detection node and the marked lower detection node, and highlighting a line between the upper detection node and the marked lower detection node in the high-voltage switch cabinet model.
Compared with the prior art, the invention has the beneficial effects that: through setting up the detection node in high tension switchgear, according to the current flow direction, confirm the incidence relation between the detection node to according to the discharge data of detection node obtained, judge whether the electric power operation of detection node is normal, if abnormal, confirm the position that leads to electric power operation abnormal fast according to the incidence relation between the detection node, thereby can realize the effective monitoring to the electric power running state inside the high tension switchgear, can lock fast when the electric power running state of high tension switchgear is unusual again and produce the position that electric power operation is unusual.
Drawings
Fig. 1 is a schematic diagram of the present invention.
Detailed Description
As shown in fig. 1, the partial discharge monitoring system of the high-voltage switch cabinet comprises a monitoring center, wherein the monitoring center is in communication connection with a data acquisition module, a data processing module, a data analysis module and a positioning early warning module;
the data acquisition module comprises a plurality of data acquisition terminals and is used for acquiring discharge data in the high-voltage switch cabinet, and the specific process comprises the following steps:
selecting a high-voltage switch cabinet, arranging detection nodes in the high-voltage switch cabinet, and arranging corresponding data acquisition terminals in each detection node; marking the power operation relation of the detection nodes to form a node relation graph;
it should be further noted that, in the implementation process, the power operation relationship of the detection node specifically includes:
marking two adjacent detection nodes; it should be further noted that, in the implementation process, two adjacent detection nodes refer to that the two detection nodes pass through in sequence according to the current flow direction, and no other detection node exists between the two detection nodes;
respectively marking the marked two detection nodes as an upper detection node and a lower detection node according to the current flow direction, and associating the upper detection node with the lower detection node; it should be further noted that, in the implementation process, one upper detection node may be associated with multiple lower detection nodes at the same time, and one lower detection node may also be associated with multiple upper detection nodes at the same time;
outputting the association relations among all the detection nodes, and obtaining a node relation diagram;
each data acquisition terminal is marked with a number i, wherein i=1, 2, … …, n, n is an integer;
acquiring discharge data of each detection node in real time through a data acquisition terminal, wherein the discharge data comprises output voltage and output current;
the output voltage and output current are respectively labeled I i And U i ；
And uploading the obtained discharge data to a data processing module.
The data processing module is used for processing the discharge data obtained by the data acquisition module;
the process of the data processing module for processing the discharge data comprises the following steps:
establishing a two-dimensional coordinate system of time with respect to current and voltage;
respectively generating a voltage change curve and a current change curve according to the obtained output voltage and output current of the detection node with the reference number i, and mapping the generated voltage change curve and current change curve into a two-dimensional coordinate system to obtain a discharge data change diagram of the detection node with the reference number i;
marking a detection node with the reference number of i, marking the detection node as an upper detection node, and changing corresponding discharge data of the upper detection nodeMarking the graph, and obtaining output voltage and output current corresponding to a voltage change curve and a current change curve in the discharge data change graph of the upper detection node, which are respectively marked as I i And U i ；
Acquiring all lower detection nodes associated with the upper detection node, and marking the lower detection nodes associated with the upper detection node as j, wherein j=0, 1,2, … …, m, m is an integer, and m is more than or equal to 0;
obtaining a discharge data change graph with the reference number j, and respectively marking output voltages and output currents corresponding to a voltage change curve and a current change curve in the discharge data change graph with the reference number j as XU i And XI j ；
Obtaining a discharge judgment coefficient between an upper detection node with a reference number i and a lower detection node with a reference number j, wherein the discharge judgment coefficient comprises a voltage judgment coefficient and a current judgment coefficient; the voltage judgment coefficient and the current judgment coefficient between the upper detection node with the reference number i and the lower detection node with the reference number j are respectively marked as YX j And LX j ；
Wherein YX j ＝(U i -XU j )/(U i *UK j ) Wherein UK j Representing the voltage scaling factor of the lower detection node referenced j associated with the upper detection node referenced i, and 0 < K j ＜1；
Wherein LX j ＝(I i -I 0 )/(I i *IK j ) Wherein I 0 For the current threshold, IK j A current scaling factor representing a lower detection node associated with an upper detection node labeled i;
and sending the obtained discharge judgment coefficients of the detection nodes to a data analysis module.
The data analysis module is used for analyzing the power running state of the position of each detection node in the high-voltage switch cabinet according to the received discharge judgment coefficient of each detection node, and the specific analysis process comprises the following steps:
setting a discharge data comparison table, and matching the obtained discharge judgment coefficient with the discharge data comparison table to obtain the power running state of the corresponding detection node;
specifically, different voltage scaling factor ranges and current scaling factor ranges are set for the voltage and the current, respectively;
corresponding scoring ranges are arranged in each voltage proportional coefficient range and each current proportional coefficient range; it should be further noted that, in the implementation process, the score value of the scoring range is positively correlated with the corresponding voltage scaling factor and current scaling factor;
setting different power running states according to the scoring range; it should be further noted that, in the implementation process, the scoring ranges corresponding to different power operation states are different, and the different power operation states indicate whether the operation of the corresponding detection nodes is normal;
setting associated early warning information for the specified power running state;
matching the obtained current proportional coefficient and voltage proportional coefficient of the lower detection node associated with the upper detection node with the reference number i with different voltage proportional coefficient ranges and current proportional coefficient ranges in a discharge data comparison table, and marking the corresponding voltage proportional coefficient ranges and current proportional coefficient ranges according to the matching result;
obtaining corresponding scoring ranges according to the marked voltage proportion coefficient ranges and the marked current proportion coefficient ranges, respectively obtaining corresponding scores of voltage and current, summarizing and summing the scores to obtain a total scoring value;
and according to the obtained total score value, obtaining a corresponding power running state, judging whether power running between the lower detection nodes with the reference number j, which are associated with the upper detection node with the reference number i, is normal according to the obtained power running state, if so, not performing any operation, if not, marking the upper detection node and the corresponding lower detection node, obtaining early warning information associated with the power running state, and sending the early warning information to a positioning early warning module.
The positioning early warning module is used for determining the abnormal position of the power according to the received early warning information;
specifically, a three-dimensional coordinate system is established, and the internal structure of the high-voltage switch cabinet is mapped into the three-dimensional coordinate system to obtain a high-voltage switch cabinet model;
marking corresponding positions in the high-voltage switch cabinet model in a three-dimensional coordinate system according to the positions of all the detection nodes, and obtaining the three-dimensional coordinates of all the detection nodes;
marking an upper detection node and a corresponding lower detection node which generate early warning information according to the received early warning information;
and acquiring three-dimensional coordinates of the marked upper detection node and the marked lower detection node, and highlighting a line between the upper detection node and the marked lower detection node in the high-voltage switch cabinet model, so as to determine the position of the abnormal power operation in the high-voltage switch cabinet.
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 (1)
1. The high-voltage switch cabinet partial discharge monitoring system comprises a monitoring center and is characterized in that the monitoring center is in communication connection with a data acquisition module, a data processing module, a data analysis module and a positioning early warning module;
the data acquisition module comprises a plurality of data acquisition terminals and is used for acquiring discharge data of each detection node in the high-voltage switch cabinet;
the data processing module is used for processing the discharge data obtained by the data acquisition module to obtain discharge judgment coefficients of all the detection nodes;
the data analysis module is used for analyzing the power running state of the position of each detection node in the high-voltage switch cabinet according to the received discharge judgment coefficient of each detection node;
the positioning early warning module is used for determining the position of abnormal power operation according to the received early warning information;
the process of acquiring discharge data by the data acquisition module comprises the following steps:
setting detection nodes in the high-voltage switch cabinet, setting corresponding data acquisition terminals in each detection node, and marking the power operation relation of the detection nodes to form a node relation diagram;
acquiring discharge data of each detection node in real time through a data acquisition terminal, wherein the discharge data comprises output voltage and output current;
the power operation relation of the detection node comprises:
marking two adjacent detection nodes;
respectively marking the marked two detection nodes as an upper detection node and a lower detection node according to the current flow direction, and associating the upper detection node with the lower detection node;
outputting the association relations among all the detection nodes, and obtaining a node relation diagram;
the process of the data processing module for processing the discharge data comprises the following steps:
establishing a two-dimensional coordinate system of time with respect to current and voltage;
respectively generating a voltage change curve and a current change curve according to the obtained output voltage and output current of the detection node, and mapping the generated voltage change curve and current change curve into a two-dimensional coordinate system to obtain a discharge data change diagram of the detection node;
obtaining output voltage and output current corresponding to a voltage change curve and a current change curve in a corresponding discharge data change graph of the upper detection node;
acquiring output voltage and output current corresponding to a voltage change curve and a current change curve in a discharge data change graph of all lower detection nodes associated with the upper detection node;
obtaining a discharge judgment coefficient between the upper detection node and the lower detection node associated with the upper detection node;
the process of analyzing the power running state of the position of each detection node in the high-voltage switch cabinet by the data analysis module comprises the following steps:
setting a discharge data comparison table, matching the obtained discharge judgment coefficient with the discharge data comparison table to obtain a power running state of a corresponding detection node, judging whether power running between lower detection nodes associated with an upper detection node is normal according to the obtained power running state, if so, not performing any operation, and if not, marking the upper detection node and the corresponding lower detection node and obtaining early warning information associated with the power running state;
the process of determining the abnormal power operation position by the positioning early warning module comprises the following steps:
establishing a three-dimensional coordinate system, and mapping the internal structure of the high-voltage switch cabinet into the three-dimensional coordinate system to obtain a high-voltage switch cabinet model;
marking corresponding positions in the high-voltage switch cabinet model in a three-dimensional coordinate system according to the positions of all the detection nodes, and obtaining the three-dimensional coordinates of all the detection nodes;
marking an upper detection node and a corresponding lower detection node which generate early warning information according to the received early warning information;
and acquiring three-dimensional coordinates of the marked upper detection node and the marked lower detection node, and highlighting a line between the upper detection node and the marked lower detection node in the high-voltage switch cabinet model.
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