Control Logic for the Changeover of a Spare Transformer Unit at "El Furrial" Substation 400/230/34.5 kV

"El Furrial" 400/115 kV substation project extension includes the implementation of a control logic which will allow an automatic autotransformer spare unit changeover in a three single-phase autotransformer bank 400/230/34.5 kV, 450 MVA. In order to develop an automatic control logic for the spare unit changeover in a three single-phase autotransformer bank, CVG EDELCA has made modifications to the control and protection principles in the "El Furrial" 400/115 kV substation. Through the control logic for a spare unit changeover in a single phase autotransformer bank at "El Furrial" substation, it is foreseen to maintain periodically in operation the four autotransformers units and to obtain a time reduction in maintenance issues and it will improve the flexibility of the electrical system as well as increase quality of service to one of the most important clients in Venezuela, the oil industry