CN-122017680-A - Power line detection method, device, system, apparatus, storage medium, and program product

Abstract

The embodiment of the application provides a power line detection method, a device, a system, equipment, a storage medium and a program product. The method comprises the steps of detecting a magnetic field signal and a first ultrasonic signal, which are generated after a detection electric signal transmitted by a transmitting pen passes through an electric power circuit, carrying out frequency spectrum analysis on the magnetic field signal, determining the frequency distribution of an electromagnetic interference signal according to an analysis result, filtering signals in a frequency band indicated by the frequency distribution of the first ultrasonic signal to obtain a second ultrasonic signal, and determining fault information of the electric power circuit according to the second ultrasonic signal. The method is used for improving the anti-interference capability of the detection system on electromagnetic influence, so as to achieve the technical effect of improving the accuracy of the power line fault detection result.

Inventors

• YANG LIMEI
• LI LINGYONG
• LIU JINGYE

Assignees

• 广东电网有限责任公司梅州供电局

Dates

Publication Date

20260512

Application Date

20260115

Claims (13)

1. 1. A power line detection method applied to a receiving pen in a detection system, comprising: receiving a magnetic field signal and a first ultrasonic signal, wherein the magnetic field signal and the first ultrasonic signal are generated after a detection signal emitted by a transmitting pen passes through a power line; Performing spectrum analysis on the magnetic field signal, and determining the frequency distribution of an electromagnetic interference signal according to an analysis result, wherein the electromagnetic interference signal is generated by an external magnetic field environment of a power line; filtering the first ultrasonic signal to obtain a second ultrasonic signal, wherein the first ultrasonic signal is in a frequency band indicated by the frequency distribution; And determining fault information of the power line according to the second ultrasonic signal.
2. 2. The method of claim 1, wherein the detected electrical signal comprises an excitation signal of a predetermined frequency band.
3. 3. The method of claim 1, wherein the performing a spectral analysis on the magnetic field signal and determining a frequency distribution of the electromagnetic interference signal based on the analysis result comprises: Transforming the magnetic field signal in the time domain to the frequency domain by utilizing short-time Fourier transform to obtain a spectrogram of the magnetic field signal; and determining the frequency distribution corresponding to the electromagnetic interference signal from the spectrogram according to the frequency domain characteristics of the electromagnetic interference signal.
4. 4. The method of claim 1, wherein said determining fault information for the power line from the second ultrasonic signal comprises: Amplifying the second ultrasonic signal; And sending prompt information in response to the amplified amplitude difference of the second ultrasonic signals in the two adjacent detection periods being greater than a preset amplitude threshold, wherein the prompt information indicates that partial discharge exists in the power line.
5. 5. The method according to any one of claims 1-4, further comprising: And responding to the fact that the frequency band indicated by the frequency distribution at least partially falls into the frequency band of the detection electric signal, and the intensity of the electromagnetic interference signal is larger than a preset intensity threshold value, sending an instruction for adjusting the frequency band of the detection electric signal to the transmitting pen through the wireless communication module, wherein the instruction comprises a target frequency band to be adjusted and is used for indicating the transmitting pen to transmit the detection electric signal in the target frequency band.
6. 6. The method according to any one of claims 1-4, further comprising: And receiving the frequency band information of the detection electric signal transmitted by the transmitting pen, and displaying the frequency band indicated by the frequency band information in a display screen.
7. 7. The method according to any one of claims 1-4, further comprising: receiving a detection electric signal parameter adjustment instruction of a user, and sending frequency band and/or amplitude information indicated by the detection electric signal parameter adjustment instruction to the transmitting pen through a wireless communication module.
8. 8. A power line detection apparatus, a reception pen provided in a detection system, comprising: the detection unit is used for receiving a magnetic field signal and a first ultrasonic signal, wherein the magnetic field signal and the first ultrasonic signal are generated after a detection signal emitted by the emission pen passes through a power line; The frequency spectrum analysis unit is used for carrying out frequency spectrum analysis on the magnetic field signals and determining the frequency distribution of electromagnetic interference signals according to analysis results, wherein the electromagnetic interference signals are generated by an external magnetic field environment of a power line; the filtering unit is used for filtering the signals in the frequency band indicated by the frequency distribution from the first ultrasonic signals to obtain second ultrasonic signals; and the fault determining unit is used for determining fault information of the power line according to the second ultrasonic signal.
9. 9. A power line detection system is characterized by comprising a transmitting pen and a receiving pen, The transmitting pen transmits a detection electric signal with a preset frequency band at a first end of the power line according to a transmitting instruction, and the detection electric signal is used as an excitation signal of the power line; The receiving pen detects magnetic field signals and first ultrasonic signals, the magnetic field signals and the first ultrasonic signals are generated after detection electric signals transmitted by the transmitting pen pass through the electric power circuit, the magnetic field signals are subjected to spectrum analysis, the frequency distribution of electromagnetic interference signals is determined according to analysis results, signals in a frequency band indicated by the frequency distribution are filtered out of the first ultrasonic signals, second ultrasonic signals are obtained, and fault information of the electric power circuit is determined according to the second ultrasonic signals.
10. 10. The system of claim 9, wherein the transmitting pen and the receiving pen are provided with a composite electromagnetic shielding structure consisting of at least two electromagnetic shielding layers.
11. 11. The power line detection device is characterized by comprising a memory and a processor; The memory stores computer-executable instructions; The processor executing computer-executable instructions stored in the memory, causing the processor to perform the method of any one of claims 1-7.
12. 12. A computer readable storage medium having stored therein computer executable instructions which when executed by a processor are adapted to carry out the method of any one of claims 1-7.
13. 13. A computer program product comprising a computer program which, when executed by a processor, implements the method of any of claims 1-7.

Description

Power line detection method, device, system, apparatus, storage medium, and program product Technical Field The present application relates to the field of power technology, and in particular, to a method, apparatus, system, device, storage medium, and program product for detecting a power line. Background The power distribution engineering detection is an important link for guaranteeing the safe operation of the power system, and the power line detection belongs to one important detection in the power distribution engineering detection. Because the power line generally performs signal transmission in a complex electromagnetic environment, the power line is easily subjected to electromagnetic interference when being detected by using a related technology, and thus the fault detection result is affected. Therefore, how to improve the anti-interference capability of the detection system to electromagnetic influence when detecting the power line, so as to improve the accuracy of the power line fault detection result, is a problem to be solved. Disclosure of Invention The embodiment of the application provides a power line detection method, a device, a system, equipment, a storage medium and a program product, which are used for solving the problems. In a first aspect, an embodiment of the present application provides a method for detecting a power line, which is applied to a receiving pen in a detection system, including: receiving a magnetic field signal and a first ultrasonic signal, wherein the magnetic field signal and the first ultrasonic signal are generated after a detection signal emitted by a transmitting pen passes through a power line; Performing spectrum analysis on the magnetic field signal, and determining the frequency distribution of an electromagnetic interference signal according to an analysis result, wherein the electromagnetic interference signal is generated by an external magnetic field environment of a power line; filtering the first ultrasonic signal to obtain a second ultrasonic signal, wherein the first ultrasonic signal is in a frequency band indicated by the frequency distribution; And determining fault information of the power line according to the second ultrasonic signal. In a possible implementation manner, the detection electric signal includes an excitation signal of a preset frequency band. In one possible implementation manner, the performing spectrum analysis on the magnetic field signal, and determining the frequency distribution of the electromagnetic interference signal according to the analysis result includes: Transforming the magnetic field signal in the time domain to the frequency domain by utilizing short-time Fourier transform to obtain a spectrogram of the magnetic field signal; and determining the frequency distribution corresponding to the electromagnetic interference signal from the spectrogram according to the frequency domain characteristics of the electromagnetic interference signal. In a possible implementation manner, the determining fault information of the power line according to the second ultrasonic signal includes: Amplifying the second ultrasonic signal; And sending prompt information in response to the amplified amplitude difference of the second ultrasonic signals in the two adjacent detection periods being greater than a preset amplitude threshold, wherein the prompt information indicates that partial discharge exists in the power line. In one possible embodiment, the method further comprises: And responding to the fact that the frequency band indicated by the frequency distribution at least partially falls into the frequency band of the detection electric signal, and the intensity of the electromagnetic interference signal is larger than a preset intensity threshold value, sending an instruction for adjusting the frequency band of the detection electric signal to the transmitting pen through the wireless communication module, wherein the instruction comprises a target frequency band to be adjusted and is used for indicating the transmitting pen to transmit the detection electric signal in the target frequency band. In one possible embodiment, the method further comprises: And receiving the frequency band information of the detection electric signal transmitted by the transmitting pen, and displaying the frequency band indicated by the frequency band information in a display screen. In one possible embodiment, the method further comprises: receiving a detection electric signal parameter adjustment instruction of a user, and sending frequency band and/or amplitude information indicated by the detection electric signal parameter adjustment instruction to the transmitting pen through a wireless communication module. In a second aspect, an embodiment of the present application provides a power line detection apparatus, a receiving pen disposed in a detection system, including: the detection unit is used for receiving a magnetic field signal and a fi