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Networking Observation and Data Analysis of Corona Current Near the Ground

Author: DaiZuo
Tutor: ZhangYiJun
School: Chinese Academy of Meteorological Sciences
Course: Atmospheric Physics and Atmospheric Environment
Keywords: Corona current Point discharge Environment field Thunderstorm
CLC: TM835
Type: Master's thesis
Year: 2010
Downloads: 18
Quote: 0
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Abstract


In this paper, the metal tip will generate a strong electric field environment of the principle of corona discharge , combined with wireless data transmission technology , developed by the corona current measuring instrument and its wireless networking Observing System . Relying on China ? Field lightning test base in Guangzhou , the corona current observing systems on our southern summer thunderstorms trial observation period of four months , the results show that the system is able to achieve a certain area within the corona current networking observations. Obtained by simultaneous observation data analysis on the corona current and environment field , the electric field threshold value of the measurement system in the positive and negative environment field generating corona current and the positive and negative corona current with the positive , negative environmental farm relationship : Negative -4kV / m, the electric field of the environment of the corona onset threshold the negative environmental electric field with a negative corona current relationship of the formula I = -0 .00585 E ( E 4) ; positive corona onset threshold value is 3.5kV / m electric field of the environment , being environment field with positive corona current relationship I = 0 .009 E ( E -3.5 ) . The analysis results show that the use of corona current measurement can truly accurate inversion of the environment of a strong electric field strength , the corona current networking Observing System has important applications in thunderstorms process of observation and warning . Erection environment in order to analyze the influence of the corona current measurement results , by an electrostatic field mode simulation study , the results showed that : a table with state-of-the-art sensors with the surrounding surface features horizontal distance d and both the ratio of the height difference Δh the land acquisition shielding of the electric field at the tip of the measuring instruments erection location assurance d / Δh is greater than 2.25 , the surface features of the electric field at the tip of the shielding effect is reduced to less than 20% , for the continued development of the corona current networking observation techniques and methods to provide a theoretical basis .

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CLC: > Industrial Technology > Electrotechnical > High Voltage Engineering > High voltage test equipment and measurement techniques > High - voltage measurement technique
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