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CN-122017544-A - Three-phase signal positioning method and device for circuit breaker and electronic equipment

CN122017544ACN 122017544 ACN122017544 ACN 122017544ACN-122017544-A

Abstract

A three-phase signal positioning method, a device and electronic equipment of a circuit breaker relate to the field of power equipment and can simply and rapidly position three-phase signals. The three-phase signal positioning method of the circuit breaker comprises the steps of obtaining electromagnetic wave signals received by an omnidirectional antenna and electromagnetic wave signals received by three directional antennas respectively, denoising the electromagnetic wave signals received by the omnidirectional antenna to obtain effective signals, extracting first signals, second signals and third signals from the electromagnetic wave signals received by the three directional antennas respectively based on the effective signals, extracting peaks of the first signals, the second signals and the third signals, arranging the peaks according to time sequence to obtain a peak matrix, determining the time sequence of the three-phase signals according to the time sequence of the maximum peak in the peak matrix, and extracting A, B, C three-phase signals from the first signals, the second signals and the third signals according to the time sequence of the three-phase signals.

Inventors

  • HE SHUN

Assignees

  • 云南电网有限责任公司电力科学研究院

Dates

Publication Date
20260512
Application Date
20260104

Claims (10)

  1. 1. The utility model provides a three-phase signal positioning method of circuit breaker, its characterized in that is provided with array antenna around the circuit breaker, array antenna includes three directional antenna and an omnidirectional antenna, and three directional antenna openly faces the A, B, C looks of circuit breaker respectively, and an omnidirectional antenna sets up in circuit breaker B looks horizontal front, the method includes: Acquiring electromagnetic wave signals received by an omnidirectional antenna and electromagnetic wave signals respectively received by three directional antennas; denoising the electromagnetic wave signals received by the omnidirectional antenna to obtain effective signals; Extracting a first signal, a second signal and a third signal from electromagnetic wave signals respectively received by three directional antennas based on the effective signals; Extracting peaks of the first signal, the second signal and the third signal, and arranging the peaks in time sequence to obtain a peak matrix; And determining the time sequence of the three-phase signal according to the time sequence of the maximum peak value in the peak value matrix, and extracting A, B, C three-phase signals from the first signal, the second signal and the third signal according to the time sequence of the three-phase signal.
  2. 2. The method for positioning a three-phase signal of a circuit breaker according to claim 1, wherein determining the timing of the three-phase signal according to the timing at which the maximum peak value in the peak matrix is located comprises: And determining the phase corresponding to the time sequence of the maximum peak value according to the directional antennas corresponding to the first signal, the second signal and the third signal and the time sequence of the maximum peak value in the peak value matrix.
  3. 3. The method for positioning a three-phase signal of a circuit breaker according to claim 1, further comprising, after arranging the peaks in time sequence to obtain a peak matrix: and normalizing the peak matrix according to the maximum peak value of each directional antenna.
  4. 4. The method for positioning three-phase signals of a circuit breaker according to claim 1, wherein each row in the peak matrix is a first signal, a second signal and a third signal in sequence, and each column is a first time sequence, a second time sequence and a third time sequence in sequence, and determining the time sequence of the three-phase signals according to the time sequence of the maximum peak in the peak matrix comprises: If the time sequence of the maximum peak value of the first signal is the first time sequence, the signal of the first time sequence is the circuit breaker A phase signal; If the time sequence of the maximum peak value of the first signal is the second time sequence, the signal of the second time sequence is the circuit breaker A phase signal; If the time sequence of the maximum peak value of the first signal is the third time sequence, the signal of the third time sequence is the circuit breaker A phase signal.
  5. 5. The method for locating three-phase signals of a circuit breaker according to claim 1, wherein extracting peaks of the first signal, the second signal and the third signal, and arranging the peaks in time sequence to obtain a peak matrix comprises: Acquiring the receiving capability difference of the directional antenna; And separating peaks of the first signal, the second signal and the third signal according to the acceptance difference to obtain a peak matrix.
  6. 6. The method for positioning a three-phase signal of a circuit breaker according to claim 1, further comprising, after extracting A, B, C three-phase signals from the first signal, the second signal, and the third signal according to the timing sequence of the three-phase signals: And detecting the faults of A, B, C three phases of the circuit breaker according to the A, B, C three-phase signals.
  7. 7. The method of claim 1, wherein the directional antenna and the omni-directional antenna are microstrip antennas.
  8. 8. A circuit breaker three-phase signal positioning device, comprising: The array antenna comprises three directional antennas and an omni-directional antenna, and is used for receiving electromagnetic wave signals generated when the circuit breaker acts; the first signal extraction module is used for denoising the electromagnetic wave signals received by the omnidirectional antenna to obtain effective signals; The second signal extraction module is used for extracting a first signal, a second signal and a third signal from electromagnetic wave signals respectively received by the three directional antennas based on the effective signals; The peak value extraction module is used for extracting peaks of the first signal, the second signal and the third signal, and arranging the peaks in time sequence to obtain a peak value matrix; The signal positioning module is used for determining the time sequence of the three-phase signal according to the time sequence of the maximum peak value in the peak value matrix, and extracting A, B, C three-phase signals from the first signal, the second signal and the third signal according to the time sequence of the three-phase signal.
  9. 9. The circuit breaker three-phase signal positioning apparatus of claim 8 wherein three directional antennas are each facing forward toward A, B, C phases of the circuit breaker, and one omni-directional antenna is disposed horizontally forward of B phases of the circuit breaker.
  10. 10. An electronic device comprising a processor and a memory, the memory having stored therein one or more computer programs, the one or more computer programs comprising instructions, which when executed by the electronic device, cause the electronic device to perform the circuit breaker three-phase signal positioning method of any of claims 1-7.

Description

Three-phase signal positioning method and device for circuit breaker and electronic equipment Technical Field The application relates to the field of power equipment, in particular to a three-phase signal positioning method and device for a circuit breaker and electronic equipment. Background The breaking process of the circuit breaker can radiate electromagnetic wave signals to the outer space of the arc extinguishing chamber, the breaking capacity of the circuit breaker is related to various factors such as gas characteristics, mechanical characteristics, insulating structures and the like, and meanwhile, the factors also determine the electromagnetic wave signals radiated in the space in the breaking process of the circuit breaker. In the operation process of the circuit breaker with good arc extinguishing characteristics, excessive discharge signals are not generated, and abnormal electromagnetic wave signals are generated for the circuit breaker with high ablation degree. Therefore, the electromagnetic wave signals radiated into the space during the action of the circuit breaker are rich in information, and the arc extinguishing characteristics of the circuit breaker can be estimated by utilizing the radiated electromagnetic wave signals. For the extracted electromagnetic wave signal radiated by the action of the circuit breaker, the signal is composed of signals sent by three-phase arc-extinguishing chambers of the circuit breaker, so that the arc-extinguishing performance of the whole three phases can be only represented, and if only one or two-phase arc-extinguishing chambers are degraded, the degraded phases cannot be positioned. The method is particularly important for positioning the three-phase fault signals, is a major key point and pain point of fault analysis and maintenance of the current circuit breaker, and can greatly improve the maintenance efficiency of the high-voltage circuit breaker equipment and can reduce the power failure time and improve the power supply stability if the problem can be accurately and rapidly distinguished after the circuit breaker breaks down. In the electric signal positioning in the field of electric power engineering, the positioning of a partial discharge source by an ultrahigh frequency method is closest to the three-phase signal separation positioning of a circuit breaker, the basic idea is a time difference method (TIME DIFFERENCE of Arrival, TDOA), a plurality of ultrahigh frequency sensors placed at different positions of a transformer are utilized to receive the partial discharge signal, an equation is established by solving the time delay between the different sensors, and the spatial positioning algorithm is utilized to perform the spatial positioning of the partial discharge source. The traditional time difference positioning-based method has higher requirements on the sampling rate and the arrangement spacing of the sensors, is very dependent on high-precision time delay estimation, needs to process multipath interference and noise influence, and is high in algorithm complexity and long in calculation time consumption. Disclosure of Invention The application provides a three-phase signal positioning method and device for a circuit breaker and electronic equipment, which can position a signal source without depending on signal precision. In a first aspect, the present application provides a method for positioning a three-phase signal of a circuit breaker, where an array antenna is disposed around the circuit breaker, the array antenna includes three directional antennas and an omni-directional antenna, the three directional antennas face toward A, B, C phases of the circuit breaker respectively, and the omni-directional antenna is disposed in front of a B-phase of the circuit breaker, and the method specifically includes: Acquiring electromagnetic wave signals received by an omnidirectional antenna and electromagnetic wave signals respectively received by three directional antennas; denoising the electromagnetic wave signals received by the omnidirectional antenna to obtain effective signals; Extracting a first signal, a second signal and a third signal from electromagnetic wave signals respectively received by three directional antennas based on the effective signals; Extracting peaks of the first signal, the second signal and the third signal, and arranging the peaks in time sequence to obtain a peak matrix; And determining the time sequence of the three-phase signal according to the time sequence of the maximum peak value in the peak value matrix, and extracting A, B, C three-phase signals from the first signal, the second signal and the third signal according to the time sequence of the three-phase signal. According to the three-phase signal positioning method of the circuit breaker, electromagnetic wave signals generated by the circuit breaker are received through the compact array antenna comprising four antennas, and the corresponding phases o