I would like to ask you all that, can we discharge the energy from a capacitor, at a constant rate?

Question

this question is to answer for my self. I need to store, high voltage dc from lightening. I need to find the process or method/circuit for the discharge of this stored electricity. which may, in future, will help to save energy..

Answer 1

yes

Answer 2

No.  The rate of discharge is a function of the voltage at any given time, and the resistance of the load.  As the capacitor discharges, its voltage decreases.

From the practical standpoint, you would not be able to build a capacitor capable of withstanding the tremendous voltage of a lightning strike.

Answer 3

It seems to me that you would rather want to connect the capacitor to deliver a constant output voltage, so you could use it for real-world purposes.

The way that you would do that is to make a switching regulator to convert the voltage of the capacitor (whatever it is at that moment) to a constant value (say, 48 Volts).  Then, as the capacitor discharged, it would supply more current to the regulator, as the regulator kept its output voltage steady (48 Volts continuous), to provide a power supply that could be useful for many purposes.

The problem is, if you set it up to always deliver energy at a constant rate, then the voltage would fluctuate all over the place, and it would not be very useful to you.