Effects of humidity on variation of negative corona-generated space charge in rod to plane electrode

The Journal of Engineering

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[1] State Grid Chongqing Nan'an Power Supply Company, Chongqing 400060, People's Republic of China;State Grid Tianjin Dongli Electric Power Supply Company, Tianjin 300300, People's Republic of China;State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, People's Republic of China;

关键词: corona;    plasma transport processes;    space charge;    Poisson equation;    ionisation;    electric fields;    negative fluid model;    charged-particle density;    effective ionisation coefficient;    electron generation rate;    relative humidity;    negative ions;    negative corona-generated space charge;   

DOI  :  10.1049/joe.2018.8426

来源: publisher

【 摘 要 】

The variation of negative corona-generated space charge related to the humidity has been systematically calculated and analysed by computational approaches. A negative fluid model in which the humidity could be adjusted was established to calculate the charged-particle density and electric field under different applied voltages. The continuity equations were solved by a flux-corrected transport algorithm and the Poisson equation was computed by the successive over relaxation method. The variations of important parameters due to humidity were discussed including ionisation coefficient, attachment coefficient, effective ionisation coefficient and electron generation rate. Each of them increases with the rise in relative humidity (RH). The particles densities of electrons, positive ions and negative ions when RH is 50, 80 and 90% were also calculated, respectively, which decreased as RH increased.

【 授权许可】

CC BY