Developing a Remote Terminal Unit Circuit and Secure Wireless Transmission of Information

One of the most important issues in the modern control and power systems is real-time monitoring of the system to maintain normal operating conditions and bring the system closer to optimal operating conditions. The set of monitoring systems, from data collection units in substations to the telemetry, data transmission systems and computer systems in control centers is called the energy management systems. RTU is a device that is placed in places out of reach, it collects and stores certain information provided by the registrar and sensors connected to it in the form of codes, and it can be connected remotely if necessary to receive information or see it in real time. It is also possible to send messages remotely to the system and make changes to the location, such as turning on the relay to control the air conditioning system, lights or heater. There are foreign examples of this device with limited facilities and high prices in Iran. In this study, an attempt has been made to design and present a system that can be improved at the lowest price compared to the foreign model and with much higher features such as the use of mobile communications and the lack of need for an external modem.