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Method for jointly analyzing air gap discharge process by means of optical and electric field signals

A technology of joint analysis and discharge process, which is used in optical methods for testing, electrostatic field measurement, and dielectric strength testing.

Inactive Publication Date: 2019-07-05
NORTH CHINA ELECTRIC POWER UNIV (BAODING) +2
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Problems solved by technology

[0002] In the current research results, high-speed cameras and photomultiplier tubes are mostly used to observe the intensity of corona under impulse voltage. At optical time, it is impossible to read more detailed information during the discharge process, while the space electric field can not only record the electric field changes during the entire discharge process, but also deduce the starting time and intensity of the corona through the electric field changes

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  • Method for jointly analyzing air gap discharge process by means of optical and electric field signals
  • Method for jointly analyzing air gap discharge process by means of optical and electric field signals
  • Method for jointly analyzing air gap discharge process by means of optical and electric field signals

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Embodiment Construction

[0013] The embodiments will be described in detail below in conjunction with the accompanying drawings.

[0014] In the present invention, the operating impulse voltage with an amplitude of 84kV is repeatedly applied to measure the amplitude ΔE at the point where the electric field jumps, and the pulse amplitude ΔP of the ultraviolet instantaneous light power generated by the streamer, and each interval is a certain time to ensure that the discharge process The generated space charge is sufficiently dissipated.

[0015] Such as figure 1 Shown is the comparison diagram of electric field and light pulse, and the amplitudes of ΔE and ΔP are counted.

[0016] figure 2 It is the correspondence diagram of the electric field jump and the instantaneous light power of the streamer. Depend on figure 2 It can be seen that under the same standard operating impulse voltage, the variation amplitude of the electric field jump value ΔE is within 18.1-34.9kV / m, and the variation amplitud...

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Abstract

The invention belongs to the technical field of electric field measurement, and particularly relates to a method for jointly analyzing an air gap discharge process by means of optical and electric field signals. The method comprises the steps of applying voltages of different amplitudes multiple times, and measuring ultraviolet transient optical power emitted by halos and amplitude at an electricfield jumping position, and determining an initial moment of the halo and severity of corona ionization by utilizing spatial electric field changes. The voltages of different amplitudes are applied repeatedly at each interval of certain time, thereby ensuring that spatial charges generated in the discharging process are sufficiently dissipated. Through comparing the electric field changes obtainedthrough measurement by means of an electric field sensor with the corona luminous intensity measured by means of a photomultiplier tube, the effectiveness of the severity of the corona measured by means of an electric field sensor is illustrated.

Description

technical field [0001] The invention belongs to the technical field of electric field measurement, in particular to a method for jointly analyzing an air gap discharge process with optical and electric field signals. Background technique [0002] In current research results, high-speed cameras and photomultiplier tubes are mostly used to observe the intensity of corona under impulse voltage. Optical time cannot read more detailed information during the discharge process, while the space electric field can not only record the electric field changes during the entire discharge process, but also deduce the starting time and intensity of the corona through the electric field changes. Therefore, using the electric field sensor to observe the change of the space electric field and the corona intensity during the discharge process can judge the starting time of the corona and the severity of the corona. Contents of the invention [0003] In view of the above problems, the presen...

Claims

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Application Information

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IPC IPC(8): G01R31/12G01R29/12
CPCG01R29/12G01R31/1218
Inventor 律方成钦雨晨耿江海汪鑫宇格兴丁玉剑姚修远
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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