Fifth International Conference on AC and DC Power Transmission : 17-20 September 1991 : venue, the Institution of Electrical Engineers, Savoy Place, London WC2R 0BL, UK / organised by the Power Division of the Institution of Electrical Engineers in association with CIGRE (British National Committee), EUREL, Institute of Electrical and Electronics Engineers (United Kingdom and Republic of Ireland Section). (IEE conference publication, 1991)