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Strategy for Over Voltage

I want to understand the strategy of over voltage protection. Suppose i detect the over voltage using software and then control the outputs by switching off, then the system comes back to normal voltage. But again if i do full operation it again goes to over voltage. I really do not understand how to brake this loop. This kind of scenario is it possible? Please suggest me some solutions.
 
A common overvoltage detector is crowbar circuit that uses a voltage detector to trigger the SCR and short the output to ground in a few microseconds when the overvoltage occurs.
That then typically blows a fuse or puts the supply into current limit.
You then have to remove the voltage to reset the circuit.

A software solution may not be fast enough to protect the circuit from the overvoltage.
It likely needs to shut down the voltage within a few microseconds for good protection, and I don't know if the software can operate that fast.
If it is fast enough, then you could just lock out the circuit after it trips, and require a manual reset to prevent it from cycling.
 
I want to understand the strategy of over voltage protection. Suppose i detect the over voltage using software and then control the outputs by switching off, then the system comes back to normal voltage. But again if i do full operation it again goes to over voltage. I really do not understand how to brake this loop. This kind of scenario is it possible? Please suggest me some solutions.

What size voltage levels and what is the source and ac or dc etc.
 
Why is it a problem?
How does it get overvolt level?
Any associated equipment would normally be fed via regulators.
Ok, that is true but the idea is to write software where in if any component fails and over voltage happens, how do i handle. As you told the study has to be done of how this scenario may happen.
Apart from what has been said: Usually voltage drops when a power system is loaded, voltage doesn't rise in that case. It rises when the load is removed.
In case of regenerative braking the battery will be charged
 
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