It can be improved. Household voltage stabilizers are used to prevent the grid voltage from being too low or too high in an instant to prevent a breakdown or overcurrent from burning out household appliances.
The reason for your situation is that there are many users and there are dips and peaks in power consumption, so it is very appropriate to 'use a voltage regulator to improve it. However, there is no obvious effect when there is a lack of electricity during the dry season.