MULTI-VOLTAGE POWER TRANSFORMER FOR A HIGH-VOLTAGE ELECTRIC POWER TRANSMISSION NETWORK (POLITRAFO)

摘要

The invention relates to a multi-voltage power transformer for a high-voltage electric power transmission network (Politrafo), which is of compact design and which has different selectable input and/or output voltage levels, such as to provide different transformation ratios. The invention can be used to interconnect high-voltage electric systems at multiple transformation points. The inventive transformer is suitable for use in case of an emergency as a contingency plan in substations requiring same, since it can be configured with different input and/or output voltage levels and can be connected to different electric power transmission systems in a high-voltage network which require same owing to a failure or some other incident. The multi-voltage autotransformer takes the form of a power transformer having design characteristics which optimise the conjunction of possibilities for different values in terms of input and/output voltage and maximum power in accordance with rail transport restrictions.