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If not well designed, high voltage composite insulators are prone to ageing and failure due to corona and electric field stress. Particular care is required designing areas where the metal end connections meet the insulator core, otherwise a large electric field enhancement is observed. It is difficult to completely eradicate corona on any insulator, thus manufacturers try and minimise this phenomenon...
In this paper, the voltage-sharing performance of MOA (metal-oxide surge arrester) for 1000 kV UHV GIS is discussed using the secondary development of the finite element and boundary element numerical method by 3D simulation, ensuring the non-uniform rate of the voltage distribution can be controlled within 10%, reaches the requirements of electric field distribution and the voltage distribution on...
Having three-phase conductors arranged in inverted-delta mode in the same tower window,750 kV compact double circuit transmission line, which is built in China for the first time, has the seriously distorted voltage and electric field distribution of insulator strings, because of great mutual influence among three phases due to small phase spacing, so it is important to carry out the research on voltage-sharing...
The use of 2D finite element analysis (FEA) to predict PD magnitudes for ellipsoidal and spheroidal cavities has been demonstrated for well over a decade. However the introduction of an arbitrary defect, such as a track along an interface, converts even an axisymmetric 2D geometry to 3D, and prediction of PD from such arbitrary defects was not possible prior to the practicability of routine 3D FEA...
A novel method for seawater desalination based on the rotation coupling electromagnetic theory is proposed and the concept of electric mesh grid is given. The desalination function of electric mesh grid is realized by the electric field which is produced by network of high-density with the charge of the contrary sign. The process principle of electric mesh grid is introduced. The field distribution...
A model of capacitive voltage transformer (CVT) was developed. The model covers a representation of capacitors, their material properties, both dielectrics and conductors. 2D simulations by using FEA are achieved, imposing physical operating conditions on the physical model. Electric field and stored energy are computed with a total deviation lesser than 1% respect to analytical calculations, which...
Converting transformer bushing is the key equipment to develop the ultra-high voltage power transmission project. The electric field distribution in the bushing is correlative to resistivity, temperature and etc. Especially, the electric field distribution relatively centralizes on the bushing outlet terminal for its complex structure. In this paper, finite element analysis (FEA) is used to calculate...
The paper presents a study into the potentials and electric field distribution on insulator strings, which are used for suspension of overhead transmission lines of 400 kV and are stressed by power frequency voltage. The investigated insulator strings are used by the Public Power Corporation of Greece in high voltage transmission networks. The finite element analysis (FEA) program OPERA was used to...
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