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The active filtering and regeneration systems used in active DC traction substations must allow the natural transition from filtering to regeneration mode and vice versa. In the both operation modes, active filtering and regeneration, the grid current must be sinusoidal. Consequently, the magnitude of the fundamental network current is necessary in the control part, in order to generate the reference...
This paper is focused on a practical solution to convert a classical DC railway traction substation with unidirectional power flow into a bidirectional substation having the capability of power quality improvement through the active filtering function. The case of 12-pulse parallel rectifier in the traction substation is taken into consideration and the new functions are performed by an IGBT-based...
Summary form only given. Superconductor technologies offer solutions to critical problems facing the power transmission and distribution grid today and will play a major role in the smart and high capacity grid of the future. The best known of these technologies is superconductor underground power transmission cable. By virtue of its high current density and low losses, it offers high power capacity,...
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