CN207689618U - A kind of power cable device for monitoring and analyzing - Google Patents

Abstract

The utility model provides a power cable monitoring and analyzing device, which includes 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, and the integrated front-end monitoring device includes a DSP high-speed data acquisition system , the server includes a noise removal and interference suppression module, a feature parameter extraction module, a pattern recognition module, a fault type determination module and a query display module. The utility model aims at the research on the temperature rise effect of large-section cables under typical channel conditions, the research on thermal stress and thermal deformation, and the adverse effects of thermal deformation on cable insulation, and proposes a method for measuring and analyzing parameters such as deformation and displacement generated by cables during operation. And the early warning device can detect abnormal conditions caused by thermomechanical effects in time, reduce the probability of cable failures caused by thermomechanical effects, reduce the major losses caused by high-voltage large-section cable failures, and improve the reliability of cable operation.

Description

A power cable monitoring and analysis device

technical field

The utility model belongs to the technical field of cable monitoring, in particular to a power cable monitoring and analyzing device.

Background technique

The problem of thermomechanical effect is inevitable in the development and application of high voltage cable lines, and the failure induced by thermomechanical effect has become one of the main failure causes of high voltage cables. Under the action of thermomechanical effect, the cable will repeatedly bend and deform, which will cause fatigue strain on the cable metal sheath, cause the loss of the cable body and its accessories, and cause power failure. Especially as the selection of the cable cross-section becomes larger and the voltage level is higher and higher, the thermomechanical effect generated by the cable will also become larger and larger. If no effective countermeasures are taken, it will lead to cable arching and displacement. , excessive bending or even damage the cable. In order to reduce the harm of thermomechanical effects to cables, reduce the failure rate of cables, and provide safe and stable operation of cables, it is very necessary to study thermomechanical effects.

Theoretically, it is impossible to take measures to completely eliminate the thermomechanical effect during construction, and it always exists during operation. At present, there is no research on the monitoring of thermomechanical effect during operation and the corresponding device results at home and abroad.

Utility model content

In order to discover the existence of thermomechanical effects in time and avoid cable faults caused by them, the utility model proposes a device consisting of 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. The server includes removing The power cable monitoring device of the noise suppression interference module, feature parameter extraction module, pattern recognition module, fault type determination module and query display module reduces the major losses caused by high-voltage large-section cable faults and improves the reliability of cable operation.

The utility model is specifically a power cable monitoring and analysis device, the power cable monitoring and analysis device includes 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, the current sensor It is used to detect the load current, the temperature sensor is used to detect the temperature of the outer sheath, and the displacement sensor is used to detect the displacement deformation of the cable; the integrated front-end monitoring device includes a DSP high-speed data acquisition system, the current sensor, the The temperature sensor and the displacement sensor transmit the detection signal to the DSP high-speed data acquisition system, and the DSP high-speed data acquisition system also has a power frequency reference signal; the high-speed digital storage oscilloscope is respectively connected with the current sensor, the The temperature sensor is connected to the displacement sensor, and the detection signals of the current sensor, the temperature sensor and the displacement sensor are displayed; the DSP high-speed data acquisition system is connected to the high-speed digital storage oscilloscope, and the trigger signal is used to The high-speed digital storage oscilloscope is triggered and started. The server includes a noise removal and interference suppression module, a characteristic parameter extraction module, a pattern recognition module, a fault type determination module and a query display module, the noise removal and interference suppression module, the characteristic parameter extraction module, the pattern recognition module, the The module for determining the fault type and the query display module are sequentially connected; the DSP high-speed data acquisition system is connected to the module for removing noise and suppressing interference through an optical cable, and transmits a detection signal and a power frequency reference signal to the module for removing noise and suppressing interference. module; the module for removing noise and suppressing interference removes noise from the detection signal by means of wavelet transform or FFT transform; the feature parameter extraction module receives the signal transmitted from the module for removing noise and suppressing interference, and performs data statistics, Waveform matching and wavelet analysis; the pattern recognition module receives the signal transmitted from the feature parameter extraction module, and identifies the signal through the ART2 neural network; the determination fault type module receives the signal transmitted from the pattern recognition module Pattern recognition information, and determine the fault type through the expert system; the query display module receives the fault type information transmitted from the fault type determination module, and displays the fault type situation, and the operator can also actively pass the query The display module inquires about the fault condition of the cable; the module for determining the fault type is also connected to the signal alarm module, and transmits the fault type information to the signal alarm module, and the signal alarm module sends a corresponding type of alarm according to the fault type information Alarm.

Further, the temperature sensor is a fiber grating temperature sensor.

Further, the power cable monitoring and analysis device is used for monitoring and analyzing the position of the telescopic arc of the intermediate joint of the tunnel high-voltage cable line, the cable turning point, the cable terminal point, and the serpentine laying point.

Description of drawings

Figure 1 is a schematic diagram of the structure and composition of a power cable monitoring and analyzing device of the present invention.

Detailed ways

The specific implementation of a power cable monitoring and analysis device of the present invention will be described in detail below in conjunction with the accompanying drawings.

As shown in Figure 1, the power cable monitoring and analysis device of the present invention includes 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, and the current sensor is used to detect load current , the temperature sensor is used to detect the temperature of the outer sheath, and the displacement sensor is used to detect the displacement deformation of the cable; the integrated front-end monitoring device includes a DSP high-speed data acquisition system, the current sensor, the temperature sensor and the The displacement sensor transmits the detection signal to the DSP high-speed data acquisition system, and the DSP high-speed data acquisition system also has a power frequency reference signal; the high-speed digital storage oscilloscope is respectively connected with the current sensor, the temperature sensor and the The displacement sensor is connected to display the 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 The oscilloscope performs a trigger start.

The server includes a noise removal and interference suppression module, a characteristic parameter extraction module, a pattern recognition module, a fault type determination module and a query display module, the noise removal and interference suppression module, the characteristic parameter extraction module, the pattern recognition module, the The module for determining the fault type and the query display module are sequentially connected; the DSP high-speed data acquisition system is connected to the module for removing noise and suppressing interference through an optical cable, and transmits a detection signal and a power frequency reference signal to the module for removing noise and suppressing interference. module; the module for removing noise and suppressing interference removes noise from the detection signal by means of wavelet transform or FFT transform; the feature parameter extraction module receives the signal transmitted from the module for removing noise and suppressing interference, and performs data statistics, Waveform matching and wavelet analysis; the pattern recognition module receives the signal transmitted from the feature parameter extraction module, and identifies the signal through the ART2 neural network; the determination fault type module receives the signal transmitted from the pattern recognition module Pattern recognition information, and determine the fault type through the expert system; the query display module receives the fault type information transmitted from the fault type determination module, and displays the fault type situation, and the operator can also actively pass the query The display module queries the fault condition of the cable; the module for determining the fault type is also connected to the signal alarm module, and transmits the fault type information to the signal alarm module, and the signal alarm module sends a corresponding type of alarm according to the fault type information Alarm.

The temperature sensor is a fiber grating temperature sensor.

The power cable monitoring and analyzing device is used for monitoring and analyzing the telescopic arc position of the middle joint of the tunnel high-voltage cable line, the cable turning point, the cable terminal point and the serpentine laying point.

Finally, it should be noted that the combination of the above embodiments only illustrates the technical solutions of the present utility model rather than limiting them. Those skilled in the art should understand that those skilled in the art can modify or equivalently replace the specific embodiments of the present utility model, but these modifications or changes are within the protection scope of the pending claims.

Claims (2)

1. A power cable monitoring and analysis device, characterized in that, the power cable monitoring and analysis device includes 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, the current The sensor is used to detect the load current, the temperature sensor is used to detect the temperature of the outer sheath, and the displacement sensor is used to detect the displacement deformation of the cable; the integrated front-end monitoring device includes a DSP high-speed data acquisition system, the current sensor, The temperature sensor and the displacement sensor transmit the detection signal to the DSP high-speed data acquisition system; the high-speed digital storage oscilloscope is connected with the current sensor, the temperature sensor and the displacement sensor respectively, and the current The detection signals of the sensor, the temperature sensor and the displacement sensor are displayed; 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 by a trigger signal; The server includes a noise removal and interference suppression module, a characteristic parameter extraction module, a pattern recognition module, a fault type determination module and a query display module, the noise removal and interference suppression module, the characteristic parameter extraction module, the pattern recognition module, the Described definite fault type module and described inquiry display module are sequentially connected; Described DSP high-speed data acquisition system is connected to described removing noise and suppressing interference module by optical cable; fault type information, and the fault type situation is displayed, and the operator can also actively query the fault condition of the cable through the query display module; the fault type determination module is also connected to the signal alarm module, and the fault type information The signal is transmitted to the signal alarm module, and the signal alarm module sends a corresponding type of alarm signal according to the fault type information. 2. A power cable monitoring and analyzing device according to claim 1, wherein the temperature sensor is a fiber grating temperature sensor.