Method and system for determining wire corona noise generated by wire in corona cage

Abstract

The invention discloses a method and system for determining wire corona noise generated by a wire in a corona cage, and the method comprises the steps: measuring the noise transmitted into the corona cage by an electric reactor under the condition that the wire in the corona cage is dismounted, and obtaining the noise data of the electric reactor at different voltage levels; performing curve fitting on the reactor noise data under different voltage levels to obtain a reactor noise fitting function; acquiring first noise data under a target voltage based on the electric reactor noise fitting function; measuring the noise in the corona cage under the target voltage under the condition that a wire in the corona cage is not removed so as to obtain total noise data; and on the basis of the total noise data and the first noise data, obtaining wire corona noise generated by a wire in the corona cage under the target voltage. Accurate data can be provided for model selection of transmission conductors and tower design, and the method can be applied to design of power grid transmission lines and environmental protection of power transmission and transformation projects.

Description

Technical Field

[0001] The present invention relates to the technical field of noise measurement in power transmission and transformation projects, and more particularly to a method and system for determining conductor corona noise generated by conductors in a corona cage. Background Art

[0002] With the rapid development of power grid construction, transmission line corridors are becoming increasingly congested, and ultra-high voltage (UHV) and ultra-high voltage (UHV) lines inevitably pass through residential areas. At the same time, as public awareness of environmental protection grows, acoustic environmental issues are attracting increasing attention. Audible noise generated by transmission lines is perceptible to the human body and can have a direct impact on residents' lives. Currently, audible noise has become a decisive factor in the design of my country's ultra-high voltage (UHV) AC transmission lines. The accuracy of its calculation method also directly affects project costs and environmental protection levels. Corona cage noise testing is the cornerstone of transmission line noise control, and its data reliability depends on accurate interference identification and suppression.

[0003] One inventor uses Fourier transforms, cross-spectral analysis, and averaging to process interfering noise. This method is suitable for single sound sensors to deal with non-stationary noise. Another inventor uses a noise cancellation device combined with a driver and inertial measurement device to predict and compensate for noise. The prediction algorithm and sensor technology mentioned may also be applicable to background noise removal, but are primarily targeted at electronic devices. Another inventor proposed a background noise cancellation method based on location information, which uses the terminal's location and time information to determine the noise cancellation strategy and combines a distributed architecture with big data classification. This method is suitable for noise processing in mobile communications. Another inventor uses noise energy integration to eliminate background noise. The patent involves measuring factory reverberation time and is primarily used for eliminating factory noise. Another technology focuses on background noise removal in speech recognition systems, which captures the sound intensity of noise and command sounds and performs specific calculations.

[0004] Corona cage tests often involve a wide range of high-voltage electrical equipment. High-voltage reactors, among them, generate significant noise during operation, interfering with noise measurements during corona cage tests. Reactor noise originates from the periodic expansion and contraction of the core in an alternating magnetic field, generating vibration noise. Simultaneously, current flowing through the windings generates electromagnetic forces, causing vibrations in the windings or supporting structure. Reactor noise has a dominant frequency concentrated around 100Hz and 200Hz, and may be accompanied by high-frequency harmonics (e.g., above 1kHz) originating from current harmonics or localized magnetic saturation. The aforementioned methods cannot accurately eliminate the background noise generated by the reactor to determine conductor corona noise.

[0005] Therefore, a method is needed to determine the wire corona noise generated by the wires in the corona cage. Summary of the Invention

[0006] The present invention provides a method and system for determining the wire corona noise generated by the wire in the corona cage, so as to solve the problem of how to determine the wire corona noise of the wire in the corona cage.

[0007] In order to solve the above problem, according to one aspect of the present invention, a method for determining wire corona noise generated by a wire in a corona cage is provided, the method comprising:

[0008] With the conductors inside the corona cage removed, the noise transmitted from the reactor into the corona cage was measured to obtain reactor noise data at different voltage levels.

[0009] Perform curve fitting on the reactor noise data at different voltage levels to obtain the reactor noise fitting function;

[0010] acquiring first noise data at a target voltage based on the reactor noise fitting function;

[0011] Without removing the wires in the corona cage, measuring the noise in the corona cage at the target voltage to obtain total noise data;

[0012] The wire corona noise generated by the wire in the corona cage at the target voltage is obtained based on the total noise data and the first noise data.

[0013] Preferably, curve fitting is performed on the reactor noise data at different voltage levels to obtain a reactor noise fitting function, comprising:

[0014] The reactor noise data at different voltage levels are curve fitted using the least squares method, difference method or polynomial fitting method to obtain the reactor noise fitting function.

[0015] Preferably, the noise transmitted from the reactor to the corona cage is measured when the wires in the corona cage are removed, and the noise data of the reactor at different voltage levels are obtained, comprising: measuring the noise transmitted from the reactor to the corona cage using a noise sensor when the wires in the corona cage are removed, and obtaining the noise data of the reactor at different voltage levels; and / or

[0016] Without removing the wires in the corona cage, measuring the noise in the corona cage at the target voltage to obtain total noise data, comprising: without removing the wires in the corona cage, measuring the noise in the corona cage at the target voltage using a noise sensor to obtain total noise data;

[0017] Wherein, the noise sensor is placed on the inner wall of the corona cage.

[0018] Preferably, obtaining the wire corona noise generated by the wire in the corona cage at the target voltage based on the total noise data and the first noise data comprises:

[0019]

[0020] Among them, L p总 is the total noise data; L p1 is the first noise data; L p2 Corona noise of the conductor.

[0021] According to another aspect of the present invention, a system for determining wire corona noise generated by a wire in a corona cage is provided, the system comprising:

[0022] Reactor noise data measurement unit, used to measure the noise transmitted from the reactor into the corona cage when the wires in the corona cage are removed, and obtain reactor noise data at different voltage levels;

[0023] A curve fitting unit is used to perform curve fitting on reactor noise data at different voltage levels to obtain a reactor noise fitting function;

[0024] a first noise data acquiring unit, configured to acquire first noise data at a target voltage based on the reactor noise fitting function;

[0025] a total noise data acquisition unit, configured to measure the noise in the corona cage at the target voltage without removing the wires in the corona cage, so as to acquire total noise data;

[0026] The wire corona noise determining unit is configured to obtain the wire corona noise generated by the wire in the corona cage at the target voltage based on the total noise data and the first noise data.

[0027] Preferably, the curve fitting unit performs curve fitting on the reactor noise data at different voltage levels to obtain a reactor noise fitting function, including:

[0028] The reactor noise data at different voltage levels are curve fitted using the least squares method, difference method or polynomial fitting method to obtain the reactor noise fitting function.

[0029] Preferably, the reactor noise data measuring unit measures the noise transmitted from the reactor to the corona cage when the wires in the corona cage are removed, and obtains the reactor noise data at different voltage levels, comprising: measuring the noise transmitted from the reactor to the corona cage using a noise sensor when the wires in the corona cage are removed, and obtaining the reactor noise data at different voltage levels; and / or

[0030] The total noise data acquisition unit measures the noise in the corona cage at the target voltage without removing the wires in the corona cage to obtain the total noise data, comprising: measuring the noise in the corona cage at the target voltage using a noise sensor without removing the wires in the corona cage to obtain the total noise data;

[0031] Wherein, the noise sensor is placed on the inner wall of the corona cage.

[0032] Preferably, the wire corona noise acquiring unit acquires the wire corona noise generated by the wire in the corona cage at the target voltage based on the total noise data and the first noise data, comprising:

[0033]

[0034] Among them, L p总 is the total noise data; L p1 is the first noise data; L p2 Corona noise of the conductor.

[0035] According to another aspect of the present invention, a computer-readable storage medium is provided, on which a computer program is stored. When the program is executed by a processor, any step of a method for determining wire corona noise generated by a wire in a corona cage is implemented.

[0036] According to another aspect of the present invention, the present invention provides an electronic device, including:

[0037] The computer-readable storage medium described above; and

[0038] One or more processors are configured to execute the program in the computer-readable storage medium.

[0039] The present invention provides a method and system for determining conductor corona noise generated by conductors within a corona cage, comprising: measuring the noise transmitted from a reactor into the corona cage with the conductors removed, obtaining reactor noise data at different voltage levels; performing curve fitting on the reactor noise data at different voltage levels to obtain a reactor noise fitting function; obtaining first noise data at a target voltage based on the reactor noise fitting function; measuring the noise within the corona cage at the target voltage without removing the conductors within the corona cage to obtain total noise data; and obtaining conductor corona noise generated by the conductors within the corona cage at the target voltage based on the total noise data and the first noise data. The present invention can efficiently and accurately measure the corona discharge noise of transmission conductors in corona cage tests, thereby providing accurate data for transmission conductor selection and tower design, and can be applied to the design of power grid transmission lines and the environmental protection of power transmission and transformation projects. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] A more complete understanding of exemplary embodiments of the present invention may be obtained by referring to the following drawings:

[0041] Figure 1 Flowchart of a method 100 for determining wire corona noise generated by a wire in a corona cage according to an embodiment of the present invention;

[0042] Figure 2 Schematic diagram of measurement results and fitting curves of sensors in a corona cage according to an embodiment of the present invention;

[0043] Figure 3 FIG. 3 is a schematic structural diagram of a system 300 for determining wire corona noise generated by a wire in a corona cage according to an embodiment of the present invention. DETAILED DESCRIPTION

[0044] Exemplary embodiments of the present invention will now be described with reference to the accompanying drawings. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided to provide a thorough and complete disclosure of the present invention and to fully convey the scope of the present invention to those skilled in the art. The terminology used in the exemplary embodiments shown in the accompanying drawings is not intended to limit the present invention. In the accompanying drawings, identical elements are denoted by the same reference numerals.

[0045] Unless otherwise specified, the terms used herein (including technical terms) have the meanings commonly understood by those skilled in the art. In addition, it is understood that terms defined in commonly used dictionaries should be understood to have the same meanings as those in the context of the relevant fields, and should not be understood as idealized or overly formal meanings.

[0046] Figure 1 FIG. 1 is a flow chart of a method 100 for determining the wire corona noise generated by a wire in a corona cage according to an embodiment of the present invention. Figure 1 As shown, the method for determining conductor corona noise generated by conductors within a corona cage, provided in an embodiment of the present invention, can efficiently and accurately measure the corona discharge noise of transmission conductors during corona cage tests, thereby providing accurate data for transmission conductor selection and tower design. This method can be applied to the design of power grid transmission lines and the environmental protection of power transmission and transformation projects. The method 100 for determining conductor corona noise generated by conductors within a corona cage, provided in an embodiment of the present invention, begins at step 101. In step 101, with the conductors within the corona cage removed, the noise propagated from the reactor into the corona cage is measured to obtain reactor noise data at different voltage levels.

[0047] Preferably, the method measures the noise transmitted from the reactor into the corona cage when the wires in the corona cage are removed, and obtains the reactor noise data at different voltage levels, including: measuring the noise transmitted from the reactor into the corona cage using a noise sensor when the wires in the corona cage are removed, and obtaining the reactor noise data at different voltage levels; wherein the noise sensor is placed on the inner wall of the corona cage.

[0048] In this embodiment of the present invention, the wires in the corona cage are removed, while the other test circuits remain unchanged. A noise sensor on the corona cage wall measures the noise generated by the entire power supply (i.e., the reactor) and the noise level propagating to the noise collection location within the corona cage. By varying the voltage, reactor noise data is obtained at different voltage levels.

[0049] In step 102 , curve fitting is performed on reactor noise data at different voltage levels to obtain a reactor noise fitting function.

[0050] Preferably, curve fitting is performed on the reactor noise data at different voltage levels to obtain a reactor noise fitting function, comprising:

[0051] The reactor noise data at different voltage levels are curve fitted using the least squares method, difference method or polynomial fitting method to obtain the reactor noise fitting function.

[0052] In the embodiment of the present invention, the reactor noise data at different voltage levels are subjected to curve fitting based on the least square method, difference method or polynomial fitting method, thereby obtaining the reactor noise fitting function. Figure 2 shown.

[0053] In step 103 , first noise data at a target voltage is acquired based on the reactor noise fitting function.

[0054] In an embodiment of the present invention, in order to obtain the wire corona noise generated by the wire in the corona cage at the target voltage, it is necessary to first obtain the first noise data generated by the reactor at the target voltage. Therefore, the target voltage is substituted into the reactor noise fitting function to obtain the first noise data.

[0055] In step 104 , without removing the wires in the corona cage, the noise in the corona cage at the target voltage is measured to obtain total noise data.

[0056] In step 105 , wire corona noise generated by the wire in the corona cage at the target voltage is obtained based on the total noise data and the first noise data.

[0057] Preferably, obtaining the wire corona noise generated by the wire in the corona cage at the target voltage based on the total noise data and the first noise data comprises:

[0058]

[0059] Among them, L p总 is the total noise data; L p1 is the first noise data; L p2 Corona noise of the conductor.

[0060] Preferably, the noise in the corona cage at the target voltage is measured without removing the wires in the corona cage to obtain total noise data, comprising: measuring the noise in the corona cage at the target voltage using a noise sensor without removing the wires in the corona cage to obtain total noise data; wherein the noise sensor is placed on the inner wall of the corona cage.

[0061] In an embodiment of the present invention, without removing the wires in the corona cage, the noise in the corona cage at the target voltage is measured to obtain total noise data. The total noise data is generated when the wire corona noise and the reactor noise coexist. Therefore, by eliminating the reactor noise, the wire corona noise can be obtained. Therefore, after obtaining the total noise data and the first noise data, the method is used to obtain the total noise data. The corona noise of the conductor generated by the conductor in the corona cage under the target voltage is calculated. The method of the invention can efficiently and accurately measure the corona discharge noise of the transmission conductor in the corona cage test.

[0062] Figure 3 FIG. 3 is a schematic diagram of a system 300 for determining the wire corona noise generated by a wire in a corona cage according to an embodiment of the present invention. Figure 3 As shown, the system 300 for determining the conductor corona noise generated by the conductor in the corona cage provided by the embodiment of the present invention includes: a reactor noise data measuring unit 301, a curve fitting unit 302, a first noise data acquiring unit 303, a total noise data acquiring unit 304 and a conductor corona noise determining unit 305.

[0063] Preferably, the curve fitting unit 302 is configured to perform curve fitting on reactor noise data at different voltage levels to obtain a reactor noise fitting function.

[0064] Preferably, the curve fitting unit 302 performs curve fitting on the reactor noise data at different voltage levels to obtain a reactor noise fitting function, including:

[0065] The reactor noise data at different voltage levels are curve fitted using the least squares method, difference method or polynomial fitting method to obtain the reactor noise fitting function.

[0066] Preferably, the first noise data acquiring unit 303 is configured to acquire first noise data at a target voltage based on the reactor noise fitting function.

[0067] Preferably, the total noise data acquiring unit 304 is configured to measure the noise in the corona cage at the target voltage without removing the wires in the corona cage, so as to acquire the total noise data.

[0068] Preferably, the wire corona noise determining unit 305 is configured to obtain the wire corona noise generated by the wire in the corona cage at the target voltage based on the total noise data and the first noise data.

[0069] Preferably, the reactor noise data measuring unit 301 measures the noise transmitted from the reactor to the corona cage when the wires in the corona cage are removed, and obtains the reactor noise data at different voltage levels, including: measuring the noise transmitted from the reactor to the corona cage using a noise sensor when the wires in the corona cage are removed, and obtaining the reactor noise data at different voltage levels; and / or

[0070] The total noise data acquisition unit 304 measures the noise in the corona cage at the target voltage without removing the wires in the corona cage to obtain total noise data, including: measuring the noise in the corona cage at the target voltage using a noise sensor without removing the wires in the corona cage to obtain total noise data;

[0071] Wherein, the noise sensor is placed on the inner wall of the corona cage.

[0072] Preferably, the conductor corona noise acquiring unit 305 acquires the conductor corona noise generated by the conductor in the corona cage at the target voltage based on the total noise data and the first noise data, including:

[0073]

[0074] Among them, L p总 is the total noise data; L p1 is the first noise data; L p2 Corona noise of the conductor.

[0075] The system 300 for determining the wire corona noise generated by the wire in the corona cage according to the embodiment of the present invention corresponds to the method 100 for determining the wire corona noise generated by the wire in the corona cage according to another embodiment of the present invention, and will not be described in detail here.

[0076] According to another aspect of the present invention, a computer-readable storage medium is provided, on which a computer program is stored. When the program is executed by a processor, any step of a method for determining wire corona noise generated by a wire in a corona cage is implemented.

[0077] According to another aspect of the present invention, the present invention provides an electronic device, including:

[0078] The computer-readable storage medium described above; and

[0079] One or more processors are configured to execute the program in the computer-readable storage medium.

[0080] The present invention has been described with reference to a few embodiments. However, it is apparent to those skilled in the art that other embodiments than the ones disclosed above are equally within the scope of the present invention.

[0081] Generally, all terms used in this disclosure are to be interpreted according to their ordinary meaning in the art, unless explicitly defined otherwise herein. All references to "a / the / the [device, component, etc.]" are to be interpreted openly as referring to at least one instance of the device, component, etc., unless explicitly stated otherwise. The steps of any method disclosed herein do not necessarily need to be performed in the exact order disclosed, unless explicitly stated otherwise.

[0082] It will be understood by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Thus, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0083] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowcharts and / or block diagrams, as well as combinations of processes and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowcharts and / or block diagrams. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0084] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0085] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 The steps for the function specified in one or more boxes.

[0086] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered by the scope of protection of the present invention.

Claims

1. A method for determining the wire corona noise generated by the wire in the corona cage, characterized in that: The method comprises: With the conductors inside the corona cage removed, the noise transmitted from the reactor into the corona cage was measured to obtain reactor noise data at different voltage levels. Perform curve fitting on the reactor noise data at different voltage levels to obtain the reactor noise fitting function; acquiring first noise data at a target voltage based on the reactor noise fitting function; Without removing the wires in the corona cage, measuring the noise in the corona cage at the target voltage to obtain total noise data; The wire corona noise generated by the wire in the corona cage at the target voltage is obtained based on the total noise data and the first noise data.

2. The method according to claim 1, characterized in that Perform curve fitting on the reactor noise data at different voltage levels to obtain the reactor noise fitting function, including: The reactor noise data at different voltage levels are curve fitted using the least squares method, difference method or polynomial fitting method to obtain the reactor noise fitting function.

3. The method according to claim 1, characterized in that Measuring the noise transmitted from the reactor into the corona cage when the wires in the corona cage are removed, and obtaining the reactor noise data at different voltage levels, including: measuring the noise transmitted from the reactor into the corona cage using a noise sensor when the wires in the corona cage are removed, and obtaining the reactor noise data at different voltage levels; and / or Without removing the wires in the corona cage, measuring the noise in the corona cage at the target voltage to obtain total noise data, comprising: without removing the wires in the corona cage, measuring the noise in the corona cage at the target voltage using a noise sensor to obtain total noise data; Wherein, the noise sensor is placed on the inner wall of the corona cage.

4. The method according to claim 1, wherein Acquiring wire corona noise generated by the wire in the corona cage at the target voltage based on the total noise data and the first noise data, comprising: Among them, L p总 is the total noise data; L p1 is the first noise data; L p2 Corona noise of the conductor.

5. A system for determining the wire corona noise generated by the wire in the corona cage, characterized in that The system comprises: Reactor noise data measurement unit, used to measure the noise transmitted from the reactor into the corona cage when the wires in the corona cage are removed, and obtain reactor noise data at different voltage levels; A curve fitting unit is used to perform curve fitting on reactor noise data at different voltage levels to obtain a reactor noise fitting function; a first noise data acquiring unit, configured to acquire first noise data at a target voltage based on the reactor noise fitting function; a total noise data acquisition unit, configured to measure the noise in the corona cage at the target voltage without removing the wires in the corona cage, so as to acquire total noise data; The wire corona noise determining unit is configured to obtain the wire corona noise generated by the wire in the corona cage at the target voltage based on the total noise data and the first noise data.

6. The system according to claim 5, characterized in that The curve fitting unit performs curve fitting on the reactor noise data at different voltage levels to obtain a reactor noise fitting function, including: The reactor noise data at different voltage levels are curve fitted using the least squares method, difference method or polynomial fitting method to obtain the reactor noise fitting function.

7. The system according to claim 5, characterized in that The reactor noise data measuring unit measures the noise transmitted from the reactor to the corona cage when the wires in the corona cage are removed, and obtains the reactor noise data at different voltage levels, including: measuring the noise transmitted from the reactor to the corona cage using a noise sensor when the wires in the corona cage are removed, and obtaining the reactor noise data at different voltage levels; and / or The total noise data acquisition unit measures the noise in the corona cage at the target voltage without removing the wires in the corona cage to obtain the total noise data, comprising: measuring the noise in the corona cage at the target voltage using a noise sensor without removing the wires in the corona cage to obtain the total noise data; Wherein, the noise sensor is placed on the inner wall of the corona cage.

8. The system according to claim 5, characterized in that The wire corona noise acquisition unit acquires the wire corona noise generated by the wire in the corona cage at the target voltage based on the total noise data and the first noise data, including: Among them, L p总 is the total noise data; L p1 is the first noise data; L p2 Corona noise of the conductor.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps of the method according to any one of claims 1 to 4 are implemented.

10. An electronic device, characterized in that: include: The computer-readable storage medium of claim 9; as well as One or more processors are configured to execute the program in the computer-readable storage medium.

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