PLC Based Automatic Load Sharing and Under Voltage Detection

Electric power distribution system is a significant part of electrical power systems in rescue of electricity to customers. Automation in the distribution field allows utilities to realize flexible control of distribution systems, which can be use to improve efficiency, reliability, and quality of electric facility. By the help of this paper we present a model of automatic distribution system. In any substation when numbers of incoming feeders to any substation are more than one then we can transfer total output feeder to any number of incoming feeder without interrupting power supply in case of failure of any one or more than feeder. In this case, Incoming feeder must be design to carry total output feeder's current. In case of manual ON/OFF operations the time span between failures of supply at any incoming feeder to the transfer of load to another feeder is much more. So user can't get reliable power supply. So in this project I am working to get automatic operations of circuit breaker using Programmable Logic Control system. In this project, the bus coupler and circuit breaker of output feeder are Made ON/OFF by Programmable Logic Control system. Programmable Logic Control programming will be so that it will detect the failure of any incoming feeder and respectively the output feeders (circuit breakers) will operate.