To forecast the electromagnetic environment of HVDC transmission line, based on upstream finite element method (FEM) a corresponding analysis and forecasting software is developed.

In cross-country transmission lines, savings in the cost of HVDC lines can offset the higher cost of HVDC terminals when com-pared with HVAC transmission line.

This paper describes an on - line controller for the fast and flexible control of the HVDC transmission system based on fuzzy logic and ANN.