Optimizing Loss Reduction Trough a Converted HVAC Transmission Line

Losses are an important parameter of consideration for mitigation and thereby enhancing the Available Transfer Capability of Power Systems. Loss mitigation is a two stage process the first stage is the Planning phase and the second stage is the Operational phase. This book discusses briefly the Planning phase activities. This is described in chapter one. Therefore a need thus arises to consider transmission line alternatives that could substantially increase the power transfer capability of existing high voltage alternating current (HVAC) transmission lines. The power transfer capability of HVAC lines is limited by the reactive power needed by the line. However, when HVDC is applied, the only loss on the line is due to the resistance of the conductors, thus it is expected that more power will be transferred across the line compared to a HVAC system. In chapter two a methodology will be developed showing how to convert a HVAC line to a HVDC line. The various methods of mitigating the losses in the Operational phase have been presented also in chapter one with emphasis on one technique whereby a converted existing HVAC transmission line has to carry direct current (DC).