From project conception to completion, various aspects of the design process affect power. For details, see this link in the Vivado Design Suite User Guide: Power Analysis and Optimization (UG907).
Power Tip: During the design
process, you can compare the total power of the design to the power budget using the
set_operating_conditions -design_power_budget <Power in
Watts> XDC constraint. If the power budget is exceeded, early
intervention is the easiest way to correct design power.