Automation of 11 kv substation using raspberry pi
Electricity plays an inevitable role in the development of the nation. In the conventional methodology, substation automation is done by using PLCs and SCADA systems, but for a small substation automation, this system is considerably expensive. This project adopts low cost automation solutions based on recent IOT technology using embedded processors like raspberry pi for automation of a small 11 kV substation. This gives the advantage of cost reduction plus a plethora of connectivity options. In this paper, Codesys IEC 61131-3 software is used to convert a Raspberry pi as a soft PLC. Analog and digital parameters from field are monitored and controlled using GPIOs pins, interfacing relays and communication ports available in raspberry pi. The automation sequences for control monitoring and protection of the system is defined using ladder diagram programming in IEC 61131-3 Codesys development platform. User interface and HMI screens are developed using Codesys web visualization segment which can be accessed both locally as well as over a wired or wireless network.