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In order to analyze the potential and electric field distribution of one 330kV AC terminal tower with composite cross-arms, the full three-dimensional (3D) finite-element method (FEM) model was established for numerical simulation, using software ANSYS. The influences of tower, earth, wires and inter-phase interaction were considered. The distributions of potential and electric field on the cross-arms,...
GIS disconnector contains various special components, such as moving electrode, insulated pull rod, basin-type insulator, which are sensitive to the electric field. Due to the mechanical movement, which is realized when the conversion between open and closed states of circuit, it's possible to produce some metal, nonmetal particles, or mechanical damage on components, etc. This paper mainly focuses...
Bushing used for gas insulated switch-gears is a key equipment in GIS, which mainly uses SF6 as its insulating material. The electric field strength inside the bushing and at the surface of the bushing sheath could significantly influence the safety and stable operation. Firstly, the model of a 1000kV bushing inflated with SF6 is built. Finite element analysis is adopted to calculate the distribution...
Converter valve possesses the function of AC-DC voltage conversion and power transmission. It is an important device in the valve hall of UHVDC converter station. Since the corona discharge has a serious impact on the safe and stable operation of converter valve, it is necessary to analyze its surface electric field (E-field) distribution. In this paper, the structure characteristics of three typical...
The converter quadrivalve is one of the key devices in a ±400kV converter station valve hall at an altitude of 3820m in western China. The complex structure of quadrivalve may lead to serious electric field distortion when without well-designed shields. Besides, in view of high altitude, corona discharge is easier to occur, which threatens the secure operation of HVDC system. In this paper, the structure...
The valve winding in the converter transformer withstands several types of voltage, including the AC, DC, and the combined AC-DC voltage. It is important to consider the effects of voltage type to the electric field distribution. In this paper, a combined AC-DC source was constructed. The electric field distribution of oil paper insulation model was measured by Kerr electro-optic effect, under combined...
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