An electricity generation and distribution system consists of an AC generator, a step-up transformer, transmission lines and a series of step-down transformers providing AC electricity to the end users. The system has the following characteristics: (i) (ii) Generator power output-48.4 MW Generator voltage output-24.2 kV rms Generator frequency - 50 Hz Transformer efficiency - 100% The system is represented in the schematic of Figure below. Assume it is operating at maximum power output. (iii) (iv) Step-up transformer loop ratio - 1:10 Total resistance of transmission lines-6.00 £2 Series of step-down transformers: effective overall loop ratio - 1000:1 generator I step-up transformer resistance of transmission lines 6.00 12 step-down transformer Determine the peak-to-peak voltage of the output of the generator. On a graph paper provided, sketch a graph of 'Voltage output (kV) versus Time (s)' for the generator. Show two complete cycles. Determine the rms current in the primary coil of the step-up transformer. If there are 20 turns of wire in the primary coil of the step-up transformer, how many turns of wire are in the secondary coil of the step-up transformer? Justify your answer.

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Single Phase Transformer

A single-phase transformer is a type of power transformer. It is an electrical device that accepts converts the single phase alternating power into single phase alternating power. In this power conversion the voltage is stepped up or down. If the voltage is stepped up, the current will be stepped down and if the voltage is stepped down, the current will be stepped up.