Dynamic voltage restoration is a way to make sure that electricity is distributed at the correct level. Electric companies put electricity into the power grid, and that electricity is supposed to be sent to homes and buildings with the correct voltage (strength). If the voltage is too high or too low, it can be bad for the buildings that get the electricity and can even cause a power blackout.
Dynamic voltage restoration helps make sure the voltage stays at the correct level. It does this by automatically turning equipment like power generators on and off as needed. For example, if the voltage is too low, the equipment will turn on and provide more electricity. If the voltage is too high, the equipment will turn off and take some electricity away. This makes sure that the voltage stays at the same level, a level that is safe for the buildings and homes that get the electricity.