Transient and steady-state dc behavior of oil-impregnated pressboard

The use of renewable energy is a key topic in the global energy market. Wind parks are being built all over the world, especially offshore, and large hydroelectric power stations are producing enormous amounts of electrical energy. Yet, the regions abounding in renewable energy frequently do not coincide with the consumption sites of energy. Therefore, energy has to be transported over long distances. For this purpose, high voltage direct current (HVDC) transmission up to 1,100 kV is an efficient option.