TECHNICAL PROBLEMS ASSOCIATED WITH DEVELOPING
HVDC CONVERTER STATIONS FOR VOLTAGES ABOVE 600 kV
IEEE Transactions on Power Delivery, PWRD-2 (1):
174-181 (1987)Abstract
This paper reviews the technical problems
anticipated in the design construction and operation
of HVDC converter stations in the voltage range ±
600-1200 kV. It is based on a literature review and
discussions with experts from manufacturers and utilities.
It concludes that 800 kV is a clearly feasible
voltage step with existing knowledge, 1000 kV is practicable
with further research effort, but that 1200 kV
is unlikely to be economically feasible without a
technological breakthrough.
The principal problems identified are:
l) The behaviour of external insulation in bad
weather, especially in polluted situations
2) Transformer insulation
Controlled gas insulation
3) Surge arrester limitations
Methods of controlling overvoltages.
