CN109459662A - High-tension cable defect state evaluation system - Google Patents
High-tension cable defect state evaluation system Download PDFInfo
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- CN109459662A CN109459662A CN201811447606.4A CN201811447606A CN109459662A CN 109459662 A CN109459662 A CN 109459662A CN 201811447606 A CN201811447606 A CN 201811447606A CN 109459662 A CN109459662 A CN 109459662A
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- tension cable
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- defect state
- cable defect
- evaluation system
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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
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/083—Locating faults in cables, transmission lines, or networks according to type of conductors in cables, e.g. underground
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
-
- 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
- G01R31/1263—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 of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1272—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 of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The present invention relates to power safety technique fields, more particularly to high-tension cable defect state evaluation system, including high-tension cable temperature collecting cell, terminal and transition joint shelf depreciation and shield circulating current acquisition unit, load current acquisition unit, signal acquisition process unit and high-tension cable defect state assessment unit；High-tension cable defect state assessment unit receives complete temperature, shelf depreciation, circulation and the load current data of signal acquisition process cell processing by GPRS network, and off-line testing data is combined to complete the assessment of high-tension cable defect state.This system can identify number of drawbacks type, by the use of this system, substantially increase the accuracy rate of electric cable stoppage state assessment, reduce economic loss to a certain extent.
Description
Technical field
The present invention relates to power safety technique fields, more particularly to high-tension cable defect state evaluation system.
Background technique
As the quickening that urbanization is gone down town promotes, high-tension cable is excellent with ground space, power supply reliability height etc. is not take up
Gesture has been widely used in city 110kV and the above high-tension line.Since the manufacturing, construction and installation, running environment etc. are all
Multifactor, defect inevitably occurs in the process of running for high-tension cable, brings potentially to the reliability service of electric system
Security risk.Therefore, it in order to avoid electric system failure due to caused by high-tension cable defect, needs to know high-tension cable defect
It is not studied.
The research about electric cable stoppage identification is studied mainly around shelf depreciation at present, has pertinent literature using under non-
Sampling shearing wavelet domain Enhancement Method identifies cable partial discharge signal graph, to judge the defect type of cable；Or
Different frequency oscillating wave voltage is had studied to the Characteristics of Partial Discharge of electric cable stoppage, and carries out the mould of defect using BP neural network
Formula identification；Or the local discharge characteristic parameter extracting method based on ultrasonic method, and defect recognition is carried out using support vector machines.
The above research and utilization shelf depreciation is an effective method to the defect recognition in terms of cable insulation, but except this it
Outside, there is also a plurality of types of defects such as oversheath loss, conductor joint heatings, the feature for only relying on partial discharge is difficult to high-tension cable
Number of drawbacks type.
As on-line monitoring technique is widely applied in high-tension cable operation management, shelf depreciation, shield circulating current and electricity
The cables principal states characteristic quantity such as cable temperature has realized the real-time acquisition of data, transimission and storage.In addition, the daily electricity of operation maintenance personnel
Cable maintenance is also accumulated from a large amount of off-line data, therefore considers to analyze existing data, establishes high-tension cable defect shape
State assessment device and system.
Summary of the invention
For the shortcoming of high-tension cable defect state assessment, the present invention provides that a kind of accuracy is higher, index is more
Source and the defect state evaluation system that high-tension cable defect comprehensively, objectively can be analyzed and be tested and assessed.This system can identify more
Kind defect type is substantially increased the accuracy rate of electric cable stoppage state assessment, is reduced to a certain extent by the use of this system
Economic loss.
The technical scheme is that；High-tension cable defect state evaluation system, including high-tension cable temperature collecting cell,
Terminal and transition joint shelf depreciation and shield circulating current acquisition unit, load current acquisition unit, signal acquisition process unit and
High-tension cable defect state assessment unit；It is complete that high-tension cable temperature collecting cell by optical fiber temperature-measurement device acquires high-tension cable in real time
The temperature data of line；Shelf depreciation and shield circulating current acquisition unit are real by HFCT local discharge sensor and circulation sensor respectively
When acquisition hv cable termination and transition joint ground line on shelf depreciation and circulating data；Load current acquisition unit passes through
Current sensor acquires cable load current data；Signal acquisition process unit is responsible for completing high-tension cable items monitoring data
Acquisition and pretreatment；High-tension cable defect state assessment unit is complete by GPRS network reception signal acquisition process cell processing
Temperature, shelf depreciation, circulation and load current data, and off-line testing data is combined to complete the assessment of high-tension cable defect state.
Further, off-line testing data include ac voltage withstanding test front and back insulation resistance of main, dielectric dissipation factor, oversheath
Insulation resistance, copper shield resistance and conductor resistance compare incrementss.
Further, temperature data includes cable conductor temperature, A, B, C phase cable conductor temperature difference.
Further, circulating data includes shield circulating current, shield circulating current and load current ratio, and Partial Discharge Data includes part
Discharge capacity, partial discharge pulse's density.
Further, cable load current data include running current.
Further, the high-tension cable defect state assessment unit includes the following steps the process of data；
S1: according to historical statistical data, high-tension cable defect sample library is established；
S2: sorting out continuity status index sample from historical statistical data, to index sample using competitive agglomeration algorithm to it
Sliding-model control is carried out, cluster centre and subordinating degree function are obtained；
S3: the threshold value of setting minimum support and confidence level, the foundation as search frequent item set；
S4: the frequent item set for meeting support and confidence threshold value is excavated using Apriori algorithm, and according to these frequent episodes
Collection establishes the correlation rule of high-tension cable defect recognition；
S5: the off-line testing number that the monitoring data obtained from high-tension cable defect state assessment unit, off-line test are obtained
Continuous state index in is updated in subordinating degree function, maximum membership degree is calculated, to obtain the affiliated of the state index
The Boolean type data for obtaining generic are compared classification with the correlation rule of acquisition, determine the defect class of high-tension cable
Type.
The beneficial effects of the invention are as follows；
1, the present invention using on-line monitoring technique to high-tension cable defect test and assess needed for online monitoring data and operation/maintenance data into
It has gone real-time acquisition, transimission and storage, and off-line testing data has been integrated, provided for the assessment of high-tension cable defect state
Data basis；
2, the present invention not only judges electric cable stoppage by shelf depreciation information compared to current research, herein in connection with
The information such as temperature, circulation, load current, each off-line testing data, so that the assessment of electric cable stoppage state is more comprehensive and accurate；
3, the present invention lacks high-tension cable based on correlation rule and competitive agglomeration algorithm on the basis of these multi-source heterogeneous data
It is trapped into and has gone comprehensive and accurate analysis assessment, can identify number of drawbacks type.
Detailed description of the invention
Fig. 1 is the schematic diagram of this system.
Fig. 2 is the data mode index of system acquisition.
Fig. 3 is the process schematic diagram of high-tension cable defect state assessment unit.
Specific embodiment
The attached figures are only used for illustrative purposes and cannot be understood as limitating the patent；In order to better illustrate this embodiment, attached
Scheme certain components to have omission, zoom in or out, does not represent the size of actual product；To those skilled in the art,
The omitting of some known structures and their instructions in the attached drawings are understandable.Being given for example only property of positional relationship is described in attached drawing
Illustrate, should not be understood as the limitation to this patent.
Embodiment 1:
As shown in Figure 1, high-tension cable defect state evaluation system, including high-tension cable temperature collecting cell, terminal and in indirectly
Head shelf depreciation and shield circulating current acquisition unit, load current acquisition unit, signal acquisition process unit and high-tension cable defect
State assessment unit；High-tension cable temperature collecting cell is acquired the temperature number of high-tension cable all fronts by optical fiber temperature-measurement device 1 in real time
According to；By HFCT local discharge sensor 2 and circulation sensor 3, acquisition is high in real time respectively for shelf depreciation and shield circulating current acquisition unit
Voltage cable terminal and shelf depreciation and circulating data on transition joint ground line；Load current acquisition unit passes through current sense
Device 4 acquires cable load current data；Signal acquisition process unit be responsible for complete high-tension cable items monitoring data acquisition and
Pretreatment；High-tension cable defect state test and assess unit by the complete temperature of GPRS network reception signal acquisition process cell processing,
Shelf depreciation, circulation and load current data, and off-line testing data is combined to complete the assessment of high-tension cable defect state.
Wherein the number that returns of the online monitoring data of each system has n, is obtained on each cable using multiple times number monitorings
Monitoring data, and by signal acquisition process unit arrangement upload to high-tension cable defect state test and assess unit in carry out data
It compares.
Wherein, as shown in Fig. 2, a large amount of off-line testing numbers of the online monitoring data obtained by evaluation system, historical accumulation
According to composition high-tension cable defect Evaluation index system.Wherein, online monitoring data includes shield circulating current, shield circulating current and load electricity
Flow ratio, partial discharge quantity, partial discharge pulse's density, cable conductor temperature, A, B, C phase cable conductor temperature difference, running current；From
Thread test data include ac voltage withstanding test front and back insulation resistance of main, dielectric dissipation factor, oversheath insulation resistance, copper shield
Resistance and conductor resistance compare incrementss.
Off-line testing data are tested, obtained in oversheath test and D.C. resistance test in ac voltage withstanding respectively, right
Power cable periodically can be tested as above.
Wherein, the acquisition and pretreatment that analog-digital converter realizes data can be used in the signal acquisition process unit of system.
As shown in figure 3, high-tension cable defect state assessment unit includes the following steps the process of data；
S1: according to historical statistical data, high-tension cable defect sample library is established；
S2: sorting out continuity status index sample from historical statistical data, to index sample using competitive agglomeration algorithm to it
Sliding-model control is carried out, cluster centre and subordinating degree function are obtained；
S3: the threshold value of setting minimum support and confidence level, the foundation as search frequent item set；
S4: the frequent item set for meeting support and confidence threshold value is excavated using Apriori algorithm, and according to these frequent episodes
Collection establishes the correlation rule of high-tension cable defect recognition；
S5: the off-line testing number that the monitoring data obtained from high-tension cable defect state assessment unit, off-line test are obtained
Continuous state index in is updated in subordinating degree function, maximum membership degree is calculated, to obtain the affiliated of the state index
The Boolean type data for obtaining generic are compared classification with the correlation rule of acquisition, determine the defect class of high-tension cable
Type.
Historical data in step sl is the electric cable stoppage type found in the daily cable maintenance of operation maintenance personnel, root
The factually common defect in border establishes high-tension cable defect sample library.
Embodiment 2；
The present embodiment is similar to Example 1, institute the difference is that, high-tension cable defect state assessment unit can be used MCU reality
It is existing, it is realized using the process that programmed algorithm tests and assesses high-tension cable defect state, and the on-line monitoring number of each sensor acquisition
It is pre-processed according to signal acquisition process unit is input to (as encrypted or carrying out analog-to-digital conversion), by signal acquisition after having handled
Reason unit transmit data in MCU, while be manually entered off-line testing data enter in MCU with online monitoring data form test
Data carry out processing comparison with high-tension cable defect state evaluation system achievement data in MCU using test data, last defeated
Boolean type data and the correlation rule of foundation compare out, determine the defect type of corresponding high-tension cable.By the system integration
In the device, it can be combined to a high-tension cable defect inspection device, last result be output on screen and is shown, directly
It sees and is illustrated, convenient and efficient, height is intelligent.
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pair
The restriction of embodiments of the present invention.For those of ordinary skill in the art, may be used also on the basis of the above description
To make other variations or changes in different ways.There is no necessity and possibility to exhaust all the enbodiments.It is all this
Made any modifications, equivalent replacements, and improvements etc., should be included in the claims in the present invention within the spirit and principle of invention
Protection scope within.
Claims (6)
1. high-tension cable defect state evaluation system, which is characterized in that including high-tension cable temperature collecting cell, terminal and centre
Connector shelf depreciation and shield circulating current acquisition unit, load current acquisition unit, signal acquisition process unit and high-tension cable lack
The state of falling into assessment unit；High-tension cable temperature collecting cell is acquired the temperature of high-tension cable all fronts by optical fiber temperature-measurement device (1) in real time
Degree evidence；Shelf depreciation and shield circulating current acquisition unit are real by HFCT local discharge sensor (2) and circulation sensor (3) respectively
When acquisition hv cable termination and transition joint ground line on shelf depreciation and circulating data；Load current acquisition unit passes through
Current sensor (4) acquires cable load current data；Signal acquisition process unit is responsible for completing high-tension cable items monitoring number
According to acquisition and pretreatment；High-tension cable defect state assessment unit receives the complete temperature of signal acquisition process cell processing, office
Portion's electric discharge, circulation and load current data, and off-line testing data is combined to complete the assessment of high-tension cable defect state.
2. high-tension cable defect state evaluation system according to claim 1, which is characterized in that off-line testing data include
Ac voltage withstanding test front and back insulation resistance of main, dielectric dissipation factor, oversheath insulation resistance, copper shield resistance and conductor resistance
Compare incrementss.
3. high-tension cable defect state evaluation system according to claim 1, which is characterized in that temperature data includes cable
Conductor temperature, A, B, C phase cable conductor temperature difference.
4. high-tension cable defect state evaluation system according to claim 1, which is characterized in that circulating data includes sheath
Circulation, shield circulating current and load current ratio, Partial Discharge Data include partial discharge quantity, partial discharge pulse's density.
5. high-tension cable defect state evaluation system according to claim 1, which is characterized in that cable load current data
Including running current.
6. high-tension cable defect state evaluation system according to claim 1, which is characterized in that the high-tension cable defect
State assessment unit includes the following steps the process of data；
S1: according to historical statistical data, high-tension cable defect sample library is established；
S2: sorting out continuity status index sample from historical statistical data, to index sample using competitive agglomeration algorithm to it
Sliding-model control is carried out, cluster centre and subordinating degree function are obtained；
S3: the threshold value of setting minimum support and confidence level, the foundation as search frequent item set；
S4: the frequent item set for meeting support and confidence threshold value is excavated using Apriori algorithm, and according to these frequent episodes
Collection establishes the correlation rule of high-tension cable defect recognition；
S5: the off-line testing number that the monitoring data obtained from high-tension cable defect state assessment unit, off-line test are obtained
Continuous state index in is updated in subordinating degree function, maximum membership degree is calculated, to obtain the affiliated of the state index
The Boolean type data for obtaining generic are compared classification with the correlation rule of acquisition, determine the defect class of high-tension cable
Type.
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| CN201811447606.4A CN109459662B (en) | 2018-11-29 | 2018-11-29 | High-voltage cable defect state evaluation system |
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| CN111579978A (en) * | 2020-05-18 | 2020-08-25 | 刘柱华 | System and method for realizing relay fault identification based on artificial intelligence technology |
| CN111965497A (en) * | 2020-06-22 | 2020-11-20 | 内蒙古大唐国际托克托发电有限责任公司 | High-voltage cable early defect joint diagnosis method |
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