int(formatDateTime(convertFromUtc(utcnow(),'GMT Standard Time'),'HH'))The expression uses utcnow() to get the current utc datetime. It's passed into the convertFromUtc function as the first argument. The second argument is the region.
Finally, I use formatDateTime to format it using 'HH' which is 24 hour format. This outputs a string value. The int function is used to parse the string value to an integer type.
My flow has a condition that would only perform a sequence of actions between the hours of 6pm and 7am.
@or(less(variables('CurrentHour'), 7),greater(variables('CurrentHour'), 18))