Due to the dielectric film with charges from corona discharge of high-voltage direct current (HVDC) overhead lines, the electric field near the greenhouses covered by the dielectric film can be distorted. The electric field at some position on the ground level can be measured under the dielectric film. However, the distribution characteristics of the electric field cannot be obtained. In this article, based on the measurement results of some defined points, an algorithm to calculate the ion flow field with the presence of a dielectric film is proposed. Poisson’s equation and the current continuity equation are iteratively solved by the finite-element method (FEM) and the divergence theorem, respectively. The experiment validates the validity of the hybrid method. The research is helpful to understand the influence of charged dielectric film fully.

中文翻译：

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有限元与发散定理的混合方法分析包括电介质膜累积电荷在内的离子流场

由于介电膜带有来自高压直流电（HVDC）架空线的电晕放电的电荷，因此被介电膜覆盖的温室附近的电场可能会失真。可以在电介质膜下测量地平面上某个位置的电场。但是，不能获得电场的分布特性。本文基于一些定义点的测量结果，提出了一种在存在介电膜的情况下计算离子流场的算法。泊松方程和电流连续性方程分别通过有限元方法（FEM）和散度定理迭代求解。实验验证了混合方法的有效性。该研究有助于充分了解带电介质膜的影响。