Research on the Electromagnetic Characteristics of UHV-VSC Converter Valve

The characteristics of electromagnetic field for UHV-VSC converter valve are studied in this paper. The 3D electric field simulation model is established, and the indirect coupling method which takes the influence of water circuit on the overall electric field distribution into account is adopted. And the electric field distribution of the key positions of the UHV-VSC converter valve under different working conditions is calculated and evaluated, the results indicate the water circuit has some influence on the overall electrical insulation of valve tower. Besides, according to the arrangement of current carrying circuit and the material permeability of different equipment, a 3D simplified magnetic simulation model of valve tower is also set up. It was found that the material characteristic of power module shell has great influence on the overall magnetic field distribution of UHV-VSC converter valve.