I'm designing a power supply. I want a high voltage large power DC output regulated, from a wide range of pv input voltage

Using high frequency transformer curcuits, how do I solve the output variations coused by varying voltage input

 

High voltage large power means nothing to a design engineer.
You need to state some numbers, input voltage, output voltage and wattage.

 

What the TS is seeking is a regulated output inverter driving a rectifier/filter package. And fed from a solar power array. Now how high the voltage will affect the design of the transformer, as will the output of the solar cell array affect the design of the primary. HOW regulated is not specified and so I am selecting allowing a 5% variation above and below the target voltage.