Design and implementation of 220kV Double Main Transfer system switchgear interlocks using PLC programming

With the aid of a Programmable Logic Controller (PLC), the switchgear interlocks of the Double Main Transfer bus were designed in this paper. Here, we primarily concentrate on managing and regulating a bus configuration known as a Double Main Transfer (DMT) type bus in a substation that operates at a 220kV voltage level. Conventional techniques for regulating interlocks are considered dangerous because they involve human interaction in substations that contain transformers, overhead power lines, primary power lines, secondary power lines and other electrical equipment that runs at extremely high voltage. To ensure safe and secure communication between deterministic & non deterministic control applications, programmable automation in control systems offers a scalable solution. This allows for an improvement in productivity, operation optimization and downtime minimization while maintaining safety. The primary goal of this project is to create a prototype model of a 220 kV DMT substation and use ladder logic in a PLC to regulate its operation.