Is this an academic assignment? If so, I will not give you a complete solution, but I will provide some hints and suggestions.
A more conventional way of describing a circuit like this would be: A constant current source with output current = 1 A and a compliance voltage range of 0 to +32 VDC.
Is the protection fuse intended to protect the 220 VAC source or the output?
1. You will need to sense the current. A series resistor is simple and inexpensive but adds a voltage drop. If connected on the high side (the point which can go to 32 V), a level shifter may also be needed. On the low side it makes going to zero volts at the output difficult (although not impossible). Hall effect devices may overcome some of those difficulties but theyhave noise and drift problems.
2. The system will require feedback comparing the measured current to a reference which represents the 1 ampere target current. The details depend on the sensing circuit, accuracy, stability, and other parameters.
3.Consider the power dissipation. It will almost certainly exceed 32 W at some operating point. Many simulators have limited or no capability to model the power and thermal effects.
4. Consider how the circuit works at zero volts output. Many circuits work well down to 1-2 V but not below that. You may nedd a negative power supply or bias voltage for some parts of the circuit.
Lynn
