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Several HVDC installations are presently undergoing refurbishment, while others have already been through refurbishment, and this paper will review the various strategies being adopted by the owners to extending the life of their plant. The projects covered by the paper include Nelson River (2000 MW Overhead Line Transmission), Konti-Skan Pole 1 (380 MW Cable + Line Transmission), McNeill (150 MW...
The South West scheme is an important part of the development of the Swedish national grid and is a key facility to enable the production of renewable energy, in accordance with Swedish and EU energy policy. It will reinforce the AC network, increase operational reliability, and deal with transmission limitations in southern Sweden and between Sweden and Norway. The paper describes the first phase...
The power transmission utility in Uruguay (UTE) has commissioned an HVDC station at the Melo substation to provide a link to the transmission system in Brazil. Uruguay's indigenous hydro power resources have been almost fully exploited and can be an un-predictable source due to prolonged dry seasons. By linking to the much larger Brazilian power system, Uruguay will be able to have access to large...
This paper considers the challenges faced by power system planners and operators with regards to heavily loaded transmission corridors which constrain power flows within the AC system, that is, they are ‘bottlenecks’ within the AC system. Particular reference is made to long distance inter-area AC transmission lines. The addition of back-to-back HVDC schemes within these AC transmission circuits is...
The use of HVDC as an effective means of transmitting electrical energy now has a 50 year history since the first modern schemes were developed. Technological advances have resulted in HVDC becoming a reliable and efficient means of power transmission, both in competition with, and complementary to, AC transmission schemes. This paper will consider the opportunities and also some of the challenges...
The key to the provision of reliable and stable electricity supplies is the control of the real and reactive power flows in the network. A range of well proven power electronic converters are available which can provide automatic control, either for long distance bulk power transfers or for the integration of distributed generation into the network. The presentation will describe two families of converters...
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