Search

CN-121995318-A - Fault power equipment positioning method and device

CN121995318ACN 121995318 ACN121995318 ACN 121995318ACN-121995318-A

Abstract

The invention discloses a fault power equipment positioning method and device, wherein the method comprises the steps of obtaining sound signals received by three acoustic sensors in an acoustic sensor array, enabling the three acoustic sensors not to be located on the same straight line, enabling the sound signals to come from the same fault power equipment, determining a first distance, a second distance and a third distance between the fault power equipment and the three acoustic sensors according to the sound signals, selecting two groups of different acoustic sensor pairs from the three acoustic sensors, forming triangles with the fault power equipment respectively, calculating perpendicular lines and feet of the fault power equipment to the straight line where the acoustic sensor pairs are located, enabling the two acoustic sensor pairs to be the perpendicular lines and the feet, and determining azimuth information of the fault power equipment by utilizing the perpendicular lines and the feet. The invention can rapidly output the azimuth of the fault power equipment and improve the azimuth determining efficiency of the fault power equipment.

Inventors

  • LIU DONG
  • HAN BING
  • TIAN SHUHANG

Assignees

  • 中冶京诚数字科技(北京)有限公司
  • 中冶京诚工程技术有限公司
  • 北京京诚瑞达电气工程技术有限公司

Dates

Publication Date
20260508
Application Date
20251230

Claims (17)

  1. 1. A fault power device locating method, comprising: the method comprises the steps of obtaining sound signals received by three acoustic sensors in an acoustic sensor array, wherein the three acoustic sensors are not positioned on the same straight line, and the sound signals come from the same fault power equipment; According to the sound signals, determining first distances, second distances and third distances between the fault power equipment and the three acoustic sensors respectively; selecting two groups of different acoustic sensor pairs from the three acoustic sensors, respectively forming a triangle with the fault power equipment, and calculating the perpendicular line and the foot of the line from the fault power equipment to the acoustic sensor pairs, wherein the acoustic sensor pairs are two acoustic sensors; And determining azimuth information of the fault power equipment by using the vertical line and the foot drop.
  2. 2. The method of claim 1, further comprising, prior to acquiring the sound signals received by the three acoustic sensors in the acoustic sensor array: The method comprises the steps of receiving an audio abnormality judgment result sent by an embedded edge computing unit, wherein the embedded edge computing unit is arranged on a power equipment site and is used for collecting audio in real time and judging whether the audio is abnormal according to the periodicity of the audio; acquiring sound signals received by three acoustic sensors in an acoustic sensor array, comprising: and when the audio sent by the embedded computing unit is abnormal, acquiring sound signals received by three acoustic sensors in the acoustic sensor array.
  3. 3. The method of claim 1, wherein the sound signals received by the three acoustic sensors comprise a plurality of noise signals; Before determining the first distance, the second distance and the third distance between the fault power equipment and the three acoustic sensors according to the sound signals, the method further comprises: Distinguishing a plurality of noise signals by utilizing frequency characteristics of the sound signals after Fourier transformation and time period information of the received sound signals; According to the sound signal, determining a first distance, a second distance and a third distance between the fault power equipment and the three acoustic sensors respectively comprises: And according to each noise signal, determining a first distance, a second distance and a third distance between the fault power equipment and the three acoustic sensors respectively.
  4. 4. The method of claim 1, wherein selecting two different acoustic sensor pairs from the three acoustic sensors, forming triangles with the faulty power device, respectively, and calculating a vertical line and a foot of a straight line where the faulty power device is located to the acoustic sensor pairs, includes: for a set of acoustic sensor pairs, triangulating with the faulty power device, calculating the plumb and foot-drop of the faulty power device to the line in which the set of acoustic sensor pairs are located, as follows: The two acoustic sensors of the acoustic sensor pair form a straight line segment, a point Q is selected on the straight line segment, so that the absolute value of Lq1-Lq1 ' is smaller than a set threshold value, the point Q is taken as a foot drop, a connecting line of fault power equipment and the point Q is taken as a vertical line to be output, the point Q is obtained by calculating a straight line segment differentiation straight line segment 1 and a straight line segment 2, lq1 is obtained by calculating a first distance and a straight line segment 1, lq1 ' is obtained by calculating a second distance and a straight line segment 2, and the distances from the fault power equipment to the two acoustic sensors of the acoustic sensor pair are respectively the first distance and the second distance.
  5. 5. The method of claim 4, wherein Lq1 is calculated using a first distance and straight line segment 1 and Lq1 ' is calculated using a second distance and straight line segment 2 based on a predetermined gradient root-finding method, wherein the gradient root-finding method is as follows: considering the first distance or the second distance as a right triangle hypotenuse c, and considering the straight line segment 1 or the straight line segment 2 as one right angle side a of the right triangle, solving the other right angle side b of the right triangle according to the following steps 1 to 12: step 1, making the maximum value b_max=c of the right-angle side b, and making the minimum value b_min=c-a of the right-angle side b; Step 2, taking the middle points of b_max and b_min as the predicted value, wherein B (1) = (b_max+b_min)/2, and calculating a predicted value error Err (1) = c×c-a×a-B (1) ×B (1); Step 3, comparing Err (1) with a preset error threshold Err_set; step 4, if Err (1) is less than or equal to err_set, outputting b=b (1); step 5, if Err (1) is larger than Err_set, judging whether Err (1) is larger than 0; step 6, if Err (1) is greater than 0, let b_max=b (1) -Err (1); step 7, if Err (1) is less than or equal to 0, let b_min=b (1) +err (1); Step 8, calculating a new estimated value of B (2) = (b_max+b_min)/2, and calculating an estimated value error Err (2) = c×c-a×a-B (2) ×B (2); Step 9, comparing Err (2) with Err_set, if Err (2) is smaller than or equal to Err_set, outputting b=B (2), otherwise, entering step 10; step 10, calculating a new estimated value by using the estimated value error calculated in the previous two times, wherein B (x) = (B (x-2) -B (x-1))/(Err (x-2) -Err (x-1))X (0-Err (x-1)) +B (x-1), and calculating error Err (x) =c×c-a×a-B (x) ×B (x), wherein the initial value of x is 3; Step 11, if Err (x) is less than or equal to err_set, outputting b=b (x); step 12, if Err (x) is greater than err_set, let x=x+1, and return to step 10.
  6. 6. The method of claim 1, wherein determining the azimuth information of the faulty power device using the plumb line and the foot, comprises: and determining the azimuth information of the fault power equipment by taking the foot drop as a pole and the vertical line as a pole diameter in a plane taking the straight line section where the different acoustic sensor pairs are as a normal vector and the foot drop.
  7. 7. The method of claim 1, wherein the electrical device comprises one or any combination of a transformer, a generator, a high voltage switchgear, a gas insulated switchgear, a circuit breaker, an insulator, a lightning arrester.
  8. 8. A fault power device locating apparatus, comprising: The system comprises a data acquisition module, a data processing module and a data processing module, wherein the data acquisition module is used for acquiring sound signals received by three acoustic sensors in an acoustic sensor array, and the three acoustic sensors are not positioned on the same straight line; The system comprises a vertical line drop calculation module, a fault power device detection module and a fault power device detection module, wherein the vertical line drop calculation module is used for determining a first distance, a second distance and a third distance between the fault power device and three acoustic sensors respectively according to sound signals; And the azimuth determining module is used for determining azimuth information of the fault power equipment by using the vertical line and the foot drop.
  9. 9. The apparatus as recited in claim 8, further comprising: The device comprises an acoustic sensor array, an edge processing module, an embedded edge computing unit, a data acquisition module, a power equipment site, a data processing module and a data processing module, wherein the acoustic sensor array is used for acquiring sound signals received by three acoustic sensors in the acoustic sensor array; the data acquisition module is specifically used for: and when the audio sent by the embedded computing unit is abnormal, acquiring sound signals received by three acoustic sensors in the acoustic sensor array.
  10. 10. The apparatus of claim 8, wherein the sound signals received by the three acoustic sensors comprise a plurality of noise signals; Further comprises: the noise source distinguishing module is used for distinguishing a plurality of noise signals by utilizing frequency characteristics after Fourier transformation of the sound signals and time period information of the received sound signals before the vertical line drop calculation module determines the first distance, the second distance and the third distance between the fault power equipment and the three acoustic sensors respectively according to the sound signals; The plumb line drop foot calculation module is specifically used for: And according to each noise signal, determining a first distance, a second distance and a third distance between the fault power equipment and the three acoustic sensors respectively.
  11. 11. The apparatus of claim 8, wherein the plumb line foot calculation module is specifically configured to: for a set of acoustic sensor pairs, triangulating with the faulty power device, calculating the plumb and foot-drop of the faulty power device to the line in which the set of acoustic sensor pairs are located, as follows: The two acoustic sensors of the acoustic sensor pair form a straight line segment, a point Q is selected on the straight line segment, so that the absolute value of Lq1-Lq1 ' is smaller than a set threshold value, the point Q is taken as a foot drop, a connecting line of fault power equipment and the point Q is taken as a vertical line to be output, the point Q is obtained by calculating a straight line segment differentiation straight line segment 1 and a straight line segment 2, lq1 is obtained by calculating a first distance and a straight line segment 1, lq1 ' is obtained by calculating a second distance and a straight line segment 2, and the distances from the fault power equipment to the two acoustic sensors of the acoustic sensor pair are respectively the first distance and the second distance.
  12. 12. The apparatus of claim 11, wherein the vertical drop calculation module is specifically configured to calculate Lq1 using a first distance and a straight line segment 1 and Lq1 ' using a second distance and a straight line segment 2 based on a preset gradient root method, where the gradient root method is as follows: considering the first distance or the second distance as a right triangle hypotenuse c, and considering the straight line segment 1 or the straight line segment 2 as one right angle side a of the right triangle, solving the other right angle side b of the right triangle according to the following steps 1 to 12: step 1, making the maximum value b_max=c of the right-angle side b, and making the minimum value b_min=c-a of the right-angle side b; Step 2, taking the middle points of b_max and b_min as the predicted value, wherein B (1) = (b_max+b_min)/2, and calculating a predicted value error Err (1) = c×c-a×a-B (1) ×B (1); Step 3, comparing Err (1) with a preset error threshold Err_set; step 4, if Err (1) is less than or equal to err_set, outputting b=b (1); step 5, if Err (1) is larger than Err_set, judging whether Err (1) is larger than 0; step 6, if Err (1) is greater than 0, let b_max=b (1) -Err (1); step 7, if Err (1) is less than or equal to 0, let b_min=b (1) +err (1); Step 8, calculating a new estimated value of B (2) = (b_max+b_min)/2, and calculating an estimated value error Err (2) = c×c-a×a-B (2) ×B (2); Step 9, comparing Err (2) with Err_set, if Err (2) is smaller than or equal to Err_set, outputting b=B (2), otherwise, entering step 10; step 10, calculating a new estimated value by using the estimated value error calculated in the previous two times, wherein B (x) = (B (x-2) -B (x-1))/(Err (x-2) -Err (x-1))X (0-Err (x-1)) +B (x-1), and calculating error Err (x) =c×c-a×a-B (x) ×B (x), wherein the initial value of x is 3; Step 11, if Err (x) is less than or equal to err_set, outputting b=b (x); step 12, if Err (x) is greater than err_set, let x=x+1, and return to step 10.
  13. 13. The apparatus of claim 8, wherein the position determination module is specifically configured to: and determining the azimuth information of the fault power equipment by taking the foot drop as a pole and the vertical line as a pole diameter in a plane taking the straight line section where the different acoustic sensor pairs are as a normal vector and the foot drop.
  14. 14. The apparatus of claim 8, wherein the electrical device comprises one or any combination of a transformer, a generator, a high voltage switchgear, a gas insulated switchgear, a circuit breaker, an insulator, a lightning arrester.
  15. 15. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the method of any of claims 1 to 7 when executing the computer program.
  16. 16. A computer readable storage medium, characterized in that the computer readable storage medium stores a computer program which, when executed by a processor, implements the method of any of claims 1 to 7.
  17. 17. A computer program product, characterized in that the computer program product comprises a computer program which, when executed by a processor, implements the method of any of claims 1 to 7.

Description

Fault power equipment positioning method and device Technical Field The invention relates to the technical field of power, in particular to a fault power equipment positioning method and device. Background The high-voltage reactive compensation is mainly used for users of nonlinear loads in power grids, such as industrial fields of power electronic equipment including rectification, variable-frequency speed regulation, medium-frequency heating, metallurgical electrolysis, chemical electrolysis and the like, traffic fields of electrified railways, underground railways, trolleybuses and the like, IT industrial fields sensitive to broadcasting, postal service, communication and harmonic interference, and fields of exhibition centers, commercial buildings and the like with strict requirements on electric energy quality. The method is widely applied to places and industries such as electric power, automobiles, metallurgy, mechanical manufacturing, chemical industry, papermaking, coal, shipbuilding, communication, airports, large-scale venues, high-rise buildings and the like. When high-voltage current passes through the fixed reactive compensation system, air discharge or high-frequency electromagnetic vibration is generated at the cable junction, between the capacitor itself, the reactor itself, and the cable. Because this equipment belongs to high-voltage equipment, its week has all set up protective fence or wall, and this equipment during normal operating, personnel must not get into inside the equipment, prevents to take place the incident. When the power equipment on the site fails, various electromagnetic vibration sounds exist on the site, but the specific direction of noise cannot be positioned because the inside of the site cannot be accessed, so that great trouble is brought to fault positioning and preventive maintenance. In the prior art, a method for preliminary positioning through the external thermal imager exists, but the external thermal imager has poor measurement precision and plays a small role in practical application. Still slower, inefficiency is achieved when the worker locates the faulty power device. Disclosure of Invention The embodiment of the invention provides a fault power equipment positioning method, which is used for rapidly outputting the position of the fault power equipment and improving the position determining efficiency of the fault power equipment, and comprises the following steps: the method comprises the steps of obtaining sound signals received by three acoustic sensors in an acoustic sensor array, wherein the three acoustic sensors are not positioned on the same straight line, and the sound signals come from the same fault power equipment; According to the sound signals, determining first distances, second distances and third distances between the fault power equipment and the three acoustic sensors respectively; selecting two groups of different acoustic sensor pairs from the three acoustic sensors, respectively forming a triangle with the fault power equipment, and calculating the perpendicular line and the foot of the line from the fault power equipment to the acoustic sensor pairs, wherein the acoustic sensor pairs are two acoustic sensors; And determining azimuth information of the fault power equipment by using the vertical line and the foot drop. The embodiment of the invention also provides a fault power equipment positioning device, which is used for rapidly outputting the position of the fault power equipment and improving the position determining efficiency of the fault power equipment, and comprises the following components: The system comprises a data acquisition module, a data processing module and a data processing module, wherein the data acquisition module is used for acquiring sound signals received by three acoustic sensors in an acoustic sensor array, and the three acoustic sensors are not positioned on the same straight line; The system comprises a vertical line drop calculation module, a fault power device detection module and a fault power device detection module, wherein the vertical line drop calculation module is used for determining a first distance, a second distance and a third distance between the fault power device and three acoustic sensors respectively according to sound signals; And the azimuth determining module is used for determining azimuth information of the fault power equipment by using the vertical line and the foot drop. The embodiment of the invention also provides computer equipment, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor realizes the fault power equipment positioning method when executing the computer program. The embodiment of the invention also provides a computer readable storage medium, wherein the computer readable storage medium stores a computer program, and the computer program realizes the fault power equipm