A Galerkin model to study the field distribution in electrical components employing nonlinear stress grading materials
A Galerkin model to study the field distribution in electrical components employing nonlinear stress grading materials
复制标题
用于研究采用非线性应力分级材料的电气元件中的场分布的伽辽金模型
DOI：
--
复制
发表时间：
1999
期刊：
影响因子：
--
通讯作者：
M. Vitelli
中科院分区：
文献类型：
--
作者：
L. Egiziano;V. Tucci;C. Petrarca;M. Vitelli
提出了一种有效的模型，用于评估内部的电场动力学的电气元件，使用非线性应力梯度材料。该模型，在一个数值程序中实现，允许通过采用Galerkin方法的拉普拉斯方程和扩散方程的解决方案。二维域，即使是非常复杂的形状和有限厚度的分级材料被适当地考虑，允许一个准确的电场分布的评估和不同类型的非线性对应力分级效率的影响的良好理解。所提出的技术已被应用到研究内的场分布的电缆终端配备了应力控制管和悬挂帽和针玻璃绝缘子覆盖防电晕层。正弦电源频率和标准脉冲电压的数值结果阐明了不同的作用，电阻和电容的贡献，在确定的整体电位图。
An effective model is presented for the evaluation of the electric field dynamics inside electrical components, using nonlinear stress grading materials. The model, implemented in a numerical procedure, permits the solution of the Laplace equation and the diffusion equation by adopting the Galerkin method. Two-dimensional domains, even of very complex shapes and the finite thickness of the grading materials are properly taken into account, allowing an accurate evaluation of the electric field distribution and a sound understanding of the influence of the different types of nonlinearities on the stress grading efficiency. The proposed technique has been applied to study the field distributions inside a cable termination equipped with a stress control tube and in a suspension cap-and-pin glass insulator covered with an anti-corona layer. Numerical results for sinusoidal power frequency and standard impulse voltages elucidate the different role of resistive and capacitive contributions in determining the overall potential maps.