Automatic Smartcity Power Consumption Control Unit

Abstract

The probability of a transformer to get overloaded in the night times is very high due to high residential uses. In such case, one phase of transmission line is pulled off to protect the transformer due to which single phase users are affected more than who consume more electricity(3 phase users). In this project to avoid this conflict in smart cities and to maintain 24*7 power supply to high emergency areas the tripping of transformer load is prioritized into five. Initially when heating of transformer is detected alternate Street lights is switched off. If the overloading continues 3 phase supply of industrial lines are pulled off and 1 phase supply is given. If the sensor still indicates the transformer heat, 1 phase supply of 3 phase users who consume more power exceeding the tolerance limit is pulled off. If overloading still continues every 1 phase line from the transformer is tripped except the high emergency areas (hospitals, fire station and control rooms). The high emergency areas are to be supplied with 24*7 power supply and in worst case if the transformer fails to provide power supply, generator backup is provided for the high emergency areas and to alternate street lights. The switching of loads after the transformer reaching normal state is also automated based on priority from highest to lowest. The whole arrangement is automated, monitored and controlled by PLC and SCADA unit.