CN107894553B - Power cable monitoring and analyzing device - Google Patents
Power cable monitoring and analyzing device Download PDFInfo
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- CN107894553B CN107894553B CN201711082878.4A CN201711082878A CN107894553B CN 107894553 B CN107894553 B CN 107894553B CN 201711082878 A CN201711082878 A CN 201711082878A CN 107894553 B CN107894553 B CN 107894553B
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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
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- 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
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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
- G01R31/088—Aspects of digital computing
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mathematical Physics (AREA)
- Theoretical Computer Science (AREA)
- Locating Faults (AREA)
- Testing Or Calibration Of Command Recording Devices (AREA)
Abstract
The invention provides a power cable monitoring and analyzing device which comprises a current sensor, a temperature sensor, a displacement sensor, an integrated front-end monitoring device, a high-speed digital storage oscilloscope, a server and a signal alarm module, wherein the integrated front-end monitoring device comprises a DSP high-speed data acquisition system, and the server comprises a noise removal interference suppression module, a characteristic parameter extraction module, a mode identification module, a fault type determination module and a query display module. Aiming at the research of the temperature rise effect, the research of thermal stress and thermal deformation and the adverse effect of thermal deformation on cable insulation under the typical channel condition, the invention provides a device for measuring, analyzing and early warning parameters such as deformation, displacement and the like generated by a cable in operation, so that abnormal conditions caused by the thermo-mechanical effect are found in time, the probability of occurrence of faults of the cable caused by the thermo-mechanical effect is reduced, the serious loss caused by faults of the high-voltage large-section cable is reduced, and the reliability of the cable operation is improved.
Description
Technical Field
The invention belongs to the technical field of cable monitoring, and particularly relates to a power cable monitoring and analyzing device.
Background
The problem of the thermo-mechanical effect is unavoidable in the development of high-voltage cable lines, and the failure induced by the thermo-mechanical effect has become one of the main failure causes of the high-voltage cable. The cable will repeatedly bend and deform under the action of the thermo-mechanical effect, so that the cable metal sheath generates fatigue strain, the cable body and accessories thereof are lost, and power failure occurs. In particular, as the section of the cable is selected to be larger and the voltage level is higher, the thermo-mechanical effect generated by the cable will be larger and larger, and if no effective countermeasures are taken, the cable will arch, shift, bend excessively and even damage the cable. In order to reduce the damage of the thermo-mechanical effect to the cable, reduce the failure rate of the cable, provide a safe and stable operation level of the cable, and research on the thermo-mechanical effect is necessary.
In theory, the thermo-mechanical effect cannot be completely eliminated in construction, and the thermo-mechanical effect is always present in operation, so that no research and corresponding device results for monitoring the thermo-mechanical effect in operation are available at home and abroad.
Disclosure of Invention
Aiming at the research of the temperature rise effect, the thermal stress and the thermal deformation of the large-section cable under the typical channel condition and the adverse effect of the thermal deformation on the cable insulation, the invention provides a device for measuring, analyzing and early warning parameters such as deformation, displacement and the like generated by the cable in operation, and timely discovers the abnormal condition caused by the thermal mechanical effect, takes measures to reduce the probability of the occurrence of faults of the cable caused by the thermal mechanical effect, reduce the serious loss caused by the faults of the high-voltage large-section cable, and improve the reliability of the cable operation.
The invention particularly relates to a power cable monitoring and analyzing device which comprises a current sensor, a temperature sensor, a displacement sensor, an integrated front-end monitoring device, a high-speed digital storage oscilloscope, a server and a signal alarm module, wherein the current sensor is used for detecting load current, the temperature sensor is used for detecting the temperature of an outer sheath, and the displacement sensor is used for detecting the displacement deformation of a cable; the integrated front-end monitoring device comprises a DSP high-speed data acquisition system, the current sensor, the temperature sensor and the displacement sensor transmit detection signals to the DSP high-speed data acquisition system, and the DSP high-speed data acquisition system is also provided with a power frequency reference signal; the high-speed digital storage oscilloscope is respectively connected with the current sensor, the temperature sensor and the displacement sensor and displays detection signals of the current sensor, the temperature sensor and the displacement sensor; the DSP high-speed data acquisition system is connected to the high-speed digital storage oscilloscope, and the high-speed digital storage oscilloscope is triggered and started through a trigger signal. The server comprises a noise suppression interference removal module, a characteristic parameter extraction module, a mode identification module, a fault type determining module and a query display module, wherein the noise suppression interference removal module, the characteristic parameter extraction module, the mode identification module, the fault type determining module and the query display module are sequentially connected in sequence; the DSP high-speed data acquisition system is connected to the noise suppression interference removal module through an optical cable, and transmits detection signals and power frequency reference signals to the noise suppression interference removal module; the noise-removing interference-suppressing module performs noise removal on the detection signal in a wavelet transformation or FFT transformation mode; the characteristic parameter extraction module receives the signals transmitted from the noise suppression interference removal module and sequentially performs data statistics, waveform matching and wavelet analysis; the mode identification module receives the signals transmitted from the characteristic parameter extraction module and identifies the signals through an ART2 neural network; the fault type determining module receives the mode identification information transmitted from the mode identification module and determines the fault type through an expert system; the inquiry display module receives the fault type information transmitted from the fault type determining module, displays the fault type condition and can actively inquire the fault condition of the cable through the inquiry display module; the fault type determining module is also connected to the signal alarming module and transmits fault type information to the signal alarming module, and the signal alarming module sends out corresponding type alarming signals according to the fault type information.
Further, the temperature sensor is a fiber bragg grating temperature sensor.
Further, the power cable monitoring and analyzing device is used for monitoring and analyzing the expansion arc position, the cable turning position, the cable terminal position and the snakelike laying position of the middle joint of the tunnel high-voltage cable line.
Drawings
Fig. 1 is a schematic structural diagram of a power cable monitoring and analyzing device according to the present invention.
Detailed Description
A specific embodiment of a power cable monitoring and analyzing device according to the present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1, the power cable monitoring and analyzing device comprises a current sensor, a temperature sensor, a displacement sensor, an integrated front-end monitoring device, a high-speed digital storage oscilloscope, a server and a signal alarm module, wherein the current sensor is used for detecting load current, the temperature sensor is used for detecting the temperature of an outer sheath, and the displacement sensor is used for detecting the displacement deformation quantity of a cable; the integrated front-end monitoring device comprises a DSP high-speed data acquisition system, the current sensor, the temperature sensor and the displacement sensor transmit detection signals to the DSP high-speed data acquisition system, and the DSP high-speed data acquisition system is also provided with a power frequency reference signal; the high-speed digital storage oscilloscope is respectively connected with the current sensor, the temperature sensor and the displacement sensor and displays detection signals of the current sensor, the temperature sensor and the displacement sensor; the DSP high-speed data acquisition system is connected to the high-speed digital storage oscilloscope, and the high-speed digital storage oscilloscope is triggered and started through a trigger signal.
The server comprises a noise suppression interference removal module, a characteristic parameter extraction module, a mode identification module, a fault type determining module and a query display module, wherein the noise suppression interference removal module, the characteristic parameter extraction module, the mode identification module, the fault type determining module and the query display module are sequentially connected in sequence; the DSP high-speed data acquisition system is connected to the noise suppression interference removal module through an optical cable, and transmits detection signals and power frequency reference signals to the noise suppression interference removal module; the noise-removing interference-suppressing module performs noise removal on the detection signal in a wavelet transformation or FFT transformation mode; the characteristic parameter extraction module receives the signals transmitted from the noise suppression interference removal module and sequentially performs data statistics, waveform matching and wavelet analysis; the mode identification module receives the signals transmitted from the characteristic parameter extraction module and identifies the signals through an ART2 neural network; the fault type determining module receives the mode identification information transmitted from the mode identification module and determines the fault type through an expert system; the inquiry display module receives the fault type information transmitted from the fault type determining module, displays the fault type condition and can actively inquire the fault condition of the cable through the inquiry display module; the fault type determining module is also connected to the signal alarming module and transmits fault type information to the signal alarming module, and the signal alarming module sends out corresponding type alarming signals according to the fault type information.
The temperature sensor is a fiber bragg grating temperature sensor.
The power cable monitoring and analyzing device is used for monitoring and analyzing the expansion arc position of the middle joint, the cable turning position, the cable terminal position and the snakelike laying position of the tunnel high-voltage cable line.
Finally, it should be noted that the above-mentioned embodiments are merely illustrative of the technical solution of the invention and not limiting thereof. It will be understood by those skilled in the art that modifications and equivalents may be made to the particular embodiments of the invention, which are within the scope of the claims appended hereto.
Claims (3)
1. The power cable monitoring and analyzing device is characterized by comprising a current sensor, a temperature sensor, a displacement sensor, an integrated front-end monitoring device, a high-speed digital storage oscilloscope, a server and a signal alarm module, wherein the current sensor is used for detecting load current, the temperature sensor is used for detecting the temperature of an outer sheath, and the displacement sensor is used for detecting the displacement deformation of the cable; the integrated front-end monitoring device comprises a DSP high-speed data acquisition system, the current sensor, the temperature sensor and the displacement sensor transmit detection signals to the DSP high-speed data acquisition system, and the DSP high-speed data acquisition system is also provided with a power frequency reference signal; the high-speed digital storage oscilloscope is respectively connected with the current sensor, the temperature sensor and the displacement sensor and displays detection signals of the current sensor, the temperature sensor and the displacement sensor; the DSP high-speed data acquisition system is connected to the high-speed digital storage oscilloscope, and the high-speed digital storage oscilloscope is triggered and started through a trigger signal;
the server comprises a noise suppression interference removal module, a characteristic parameter extraction module, a mode identification module, a fault type determining module and a query display module, wherein the noise suppression interference removal module, the characteristic parameter extraction module, the mode identification module, the fault type determining module and the query display module are sequentially connected in sequence; the DSP high-speed data acquisition system is connected to the noise suppression interference removal module through an optical cable, and transmits detection signals and power frequency reference signals to the noise suppression interference removal module; the noise-removing interference-suppressing module performs noise removal on the detection signal in a wavelet transformation or FFT transformation mode; the characteristic parameter extraction module receives the signals transmitted from the noise suppression interference removal module and sequentially performs data statistics, waveform matching and wavelet analysis; the mode identification module receives the signals transmitted from the characteristic parameter extraction module and identifies the signals through an ART2 neural network; the fault type determining module receives the mode identification information transmitted from the mode identification module and determines the fault type through an expert system; the inquiry display module receives the fault type information transmitted from the fault type determining module, displays the fault type condition and can actively inquire the fault condition of the cable through the inquiry display module; the fault type determining module is also connected to the signal alarming module and transmits fault type information to the signal alarming module, and the signal alarming module sends out corresponding type alarming signals according to the fault type information.
2. The power cable monitoring and analyzing device according to claim 1, wherein the temperature sensor is a fiber grating temperature sensor.
3. A power cable monitoring and analysis device according to claim 2, characterized in that the power cable monitoring and analysis device is used for monitoring and analysis of the middle joint telescoping arc position, cable turns, cable ends and serpentine runs of a tunnel high voltage cable line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711082878.4A CN107894553B (en) | 2017-11-07 | 2017-11-07 | Power cable monitoring and analyzing device |
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| CN201711082878.4A CN107894553B (en) | 2017-11-07 | 2017-11-07 | Power cable monitoring and analyzing device |
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| CN107894553A CN107894553A (en) | 2018-04-10 |
| CN107894553B true CN107894553B (en) | 2023-09-26 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109344359A (en) * | 2018-09-25 | 2019-02-15 | 海南大学 | A kind of sea water anticorrosive cable and its production method, detection method |
| CN110631683A (en) * | 2019-09-26 | 2019-12-31 | 华北水利水电大学 | Building rigid part strain safety monitoring method |
| CN110631682A (en) * | 2019-09-26 | 2019-12-31 | 华北水利水电大学 | Strain safety monitoring method for cable tunnel bearing body |
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